1. The utility model provides a concertina type oral cavity mechanics of materials experiment pressure head which characterized in that includes:

the machine body (1), the machine body (1) is detachably arranged at the working end of the universal mechanical machine;

the telescopic cavity (2) is arranged in the machine body (1), and the telescopic cavity (2) is communicated with the bottom end of the machine body (1);

the telescopic mechanism (3) is arranged in the telescopic cavity (2);

the pressure plate mounting seat (4) is mounted in the telescopic cavity (2) and is close to the bottom end;

the pressing plate mechanism (5), the pressing plate mechanism (5) is located the bottom of the machine body (1), the pressing plate mechanism (5) is installed on the pressing plate installation seat (4), and the telescopic mechanism (3) is used for driving the pressing plate mechanism (5) to lift.

2. A telescopic oral cavity mechanics experimental indenter according to claim 1, wherein the pressing plate mechanism (5) comprises:

the pressing plate mounting groove (51), the pressing plate mounting groove (51) is arranged at the bottom end of the pressing plate mounting seat (4);

the return spring (52), the said return spring (52) is installed in the mounting groove of the said pressing plate (51);

the pressing plate (53), the pressing plate (53) is located organism (1) bottom, reset spring (52) with pressing plate (53) are connected, the work end of telescopic machanism (3) supports and locates pressing plate (53) top.

3. A telescopic oral cavity mechanics experimental head according to claim 2, wherein the telescopic mechanism (3) comprises:

the rotating shaft mounting groove (31) is formed in the top in the telescopic cavity (2);

the connecting rotating shaft (32), the connecting rotating shaft (32) is transversely installed in the rotating shaft installation groove (31);

the driving motor (33), the driving motor (33) is installed in the rotating shaft installation groove (31), and the output end of the driving motor (33) is connected with the connecting rotating shaft (32);

the two roller mounting ring seats (34) are positioned in the telescopic cavity (2) and close to the bottom end, and the roller mounting ring seats (34) are fixedly mounted at the top end of the pressure plate mounting seat (4);

a roller (35), said roller (35) being mounted transversely within said roller mounting ring seat (34);

a pulley (36), the pulley (36) being mounted on the connecting shaft (32);

the transmission belt (37) is arranged in the telescopic cavity (2), and the transmission belt (37) is respectively sleeved on the roller (35) and the belt wheel (36);

the two spline grooves (38) are oppositely arranged at two ends of the roller (35);

the transverse spline shafts (39) are arranged in equal number in the spline grooves (38), and the transverse spline shafts (39) are inserted into the spline grooves (38);

the first cam (30), the first cam (30) is installed on the transverse spline shaft (39), and the first cam (30) is abutted to the top end of the pressing plate (53).

4. A telescopic oral cavity mechanics experimental head according to claim 3, wherein said telescopic mechanism (3) further comprises:

the two installation seats (41) are symmetrically arranged in the telescopic cavity (2) by taking a transmission belt (37) as a center;

the vertical spline shaft (42), the vertical spline shaft (42) is vertically installed in the mounting seat (41);

the spline housing (43) is arranged in the telescopic cavity (2), the spline housing (43) is positioned above the mounting seat (41), and the spline housing (43) is sleeved outside the vertical spline shaft (42);

the lifting ring seat (44) is sleeved outside the spline sleeve (43);

the first motor (45), the first motor (45) is installed at the top end of the installation seat (41);

the first screw (46), the first screw (46) is vertically arranged in the telescopic cavity (2), one end of the first screw (46) is connected with the output end of the first motor (45), and the other end of the first screw (46) is connected with the top in the telescopic cavity (2);

the limiting rod is arranged in parallel with the first screw (46), one end of the limiting rod is connected with the inner top of the telescopic cavity (2), and the other end of the limiting rod is connected with the top end of the mounting seat (41);

the lifting screw block (47) is sleeved outside the first screw rod (46), the limiting rod penetrates through the lifting screw block (47), and the lifting ring seat (44) is fixedly connected with the lifting screw sleeve (47);

the fixing ring (48) is arranged in the telescopic cavity (2), the fixing ring (48) is sleeved outside the vertical spline shaft (42), the fixing ring (48) is positioned below the mounting seat (41), and the fixing ring (48) is fixedly connected with the bottom end of the mounting seat (41);

the two clamping rods (49) are symmetrically hinged outside the fixing ring (48) by taking the vertical spline shaft (42) as the center;

the thread groove is formed in the bottom end of the vertical spline shaft (42);

a second screw (40), wherein the second screw (40) is connected in the thread groove;

the connecting ring (21), the connecting ring (21) is sleeved outside the second screw (40);

the two overturning arms (22) are symmetrically hinged outside the connecting ring (21) by taking the second screw (40) as a center, and the ends, far away from the connecting ring (21), of the overturning arms (22) are hinged on the clamping rod (49);

the friction plate (23), the said friction plate (23) is mounted to the bottom end of the said second threaded spindle (40);

a friction block (24), the friction block (24) being mounted on the clamping bar (49);

the external thread is arranged on the transverse spline shaft (39);

the threaded sleeve (25) is sleeved on the external thread, the friction plate (23) is arranged close to the threaded sleeve (25), the threaded sleeve (25) is positioned between the two clamping rods (49), and the friction block (24) is arranged close to the friction sleeve (25);

the locking block (26), the locking block (26) is arranged at the end, far away from the roller (35), of the transverse spline shaft (39);

the two vertical grooves (27) are symmetrically arranged on the inner wall of the telescopic cavity (2);

the lifting seat (28) is connected in the vertical groove (27) in a sliding manner;

the second cam (29) is mounted at the inner end of the lifting seat (28) through a rotating shaft, and the long radius of the second cam (29) is larger than that of the first cam (30);

the locking groove (20) is formed in the inner end of the second cam (29), and the locking groove (20) is matched with the locking block (26);

the cross rod (54) is fixedly arranged in the vertical groove (27), and the cross rod (54) is positioned above the lifting seat (28);

the two transmission sleeves (55) are sleeved on the cross rod (54);

the first spring (56) is sleeved outside the cross rod (54), the first spring (56) is positioned between the two transmission sleeves (55), and two ends of the first spring (56) are respectively connected with the transmission sleeves (55);

the two first connecting arms (57) form a V-shaped structure, one end of each first connecting arm (57) is hinged to the lifting seat (28), and the other end of each first connecting arm (57) is hinged to the bottom end of the transmission sleeve (55);

one end of the lifting arm (58) is fixedly connected with the lifting screw block (47), and the other end of the lifting arm (58) extends into the vertical groove (27);

the two second connecting arms (59) form a V-shaped structure, one end of each second connecting arm (59) is hinged to the corresponding lifting arm (58), and the other end of each second connecting arm (59) is hinged to the top end of the corresponding transmission sleeve (55);

the two first bevel gears (50) are symmetrically arranged on the connecting rotating shaft (32) by taking a belt wheel (36) as a center;

the second bevel gear (61), the second bevel gear (61) is installed through the pivot in spline housing (43) top, the first bevel gear (50) setting of second bevel gear (61) adaptation.

5. A telescopic oral cavity mechanics experimental head according to claim 4, wherein said telescopic mechanism (3) further comprises:

the fixing columns are supported and installed between the mounting seat (41) and the inner top of the telescopic cavity (2).

6. The telescopic oral cavity mechanics of materials experiment pressure head of claim 4, characterized in that the bottom end of part of the vertical groove (27) is arranged through the side end of the machine body (1).

7. A telescopic oral cavity mechanics experimental head according to claim 6, wherein said telescopic mechanism (3) further comprises:

the baffle fixing seat (62) is connected in the vertical groove (27) in a sliding manner, and the baffle fixing seat (62) is connected with the outer end of the lifting seat (28);

the first installation groove (63) is formed in the end, far away from the lifting seat (28), of the baffle fixing seat (62);

the two supporting rod mounting grooves (64) are symmetrically formed in the end, far away from the lifting seat (28), of the baffle fixing seat (62) by taking the first mounting groove (63) as a center;

the baffle mounting seat (65) is mounted in the first mounting groove (63), and the baffle mounting seat (65) is exposed out of the notch of the first mounting groove (63);

the second mounting groove (66) is formed in the baffle mounting seat (65);

the top block mounting groove (67) is formed in the bottom end of the second mounting groove (66);

the mounting chamber (68) is arranged in the baffle mounting seat (65), and the mounting chamber (68) is positioned below the top block mounting groove (67);

the annular groove is formed in the end, far away from the top block mounting groove (67), of the inner wall of the mounting chamber (68);

an annular bladder (69), the annular bladder (69) mounted within the annular groove;

a first transmission plate (60), wherein the first transmission plate (60) is installed in the installation chamber (68), and the first transmission plate (60) is attached to an annular air bag (69);

one end of the transmission rod (71) extends into the mounting chamber (68) and is connected with the first transmission plate (60), and the other end of the transmission rod (71) extends into the top block mounting groove (67);

the ejector block (72) is installed in the ejector block installation groove (67), and the ejector block (72) is connected with the other end of the transmission rod (71);

the second spring (73) is positioned in the top block installation groove (67), the second spring (73) is sleeved on the transmission rod (71), one end of the second spring (73) is connected with the top block (72), and the other end of the second spring (73) is connected with the bottom end of the top block installation groove (67);

the turnover arm (74) is mounted in the second mounting groove (66) through a connecting shaft, the end, extending into the second mounting groove (66), of the turnover arm (74) is arranged in a semicircular manner, and the connecting shaft is eccentrically mounted on the turnover arm (74);

the reset torsion spring (75) is sleeved on the connecting shaft, one torsion arm end of the reset torsion spring (75) is connected with the turnover arm (74), and the other torsion arm end of the reset torsion spring (75) is connected with the inner wall of the second mounting groove (66);

the supporting rod (76) is arranged in the supporting rod mounting groove (64) through a third spring;

the pressing plate (77) is positioned at the end, far away from the lifting seat (28), of the baffle fixing seat (62), and the baffle mounting seat (65) penetrates through the pressing plate (77);

the second transmission plate (78) is arranged in the second installation groove (66), the end, away from the transmission rod (71), of the top block (72) is connected with the second transmission plate (78), and the overturning arm (74) is attached to the second transmission plate (78);

the locking rod mounting hole is communicated with the supporting rod mounting groove (64) and the first mounting groove (63);

the locking rod (79), the locking rod (79) is installed in the locking rod installation hole in a transmission way;

the locking groove (70) is formed in the inner end of the supporting rod (76), and the locking groove (70) is matched with the locking rod (79);

the air bag extending channel is formed in the side end of the baffle mounting seat (65), the air bag extending channel is communicated with the annular groove, and the lock rod (79) extends into the air bag extending channel;

a baffle (6), the baffle (6) being mounted on the invert arm (74).

8. A telescopic oral cavity mechanics experimental pressure head according to claim 7, characterized in that the baffle (6) is made of transparent material.

Background

In order to simulate the occlusion condition of teeth in the oral cavity to the jaw and detect the stress condition of the oral cavity material under different conditions, a universal mechanical machine is required to apply vertical downward pressure to the oral cavity material, and when the oral cavity material is tested by the universal mechanical machine, an experiment pressure head special for the oral cavity material is required to be adapted. The loading face of experiment pressure head is stable plane, can make the subject atress even, detects more scientifically, but the length of pressure head can not be adjusted in a flexible way to current experiment pressure head.

Disclosure of Invention

In order to achieve the purpose, the invention discloses a telescopic type oral cavity mechanics experiment pressure head, which comprises:

the machine body is detachably arranged at the working end of the universal mechanical machine;

the telescopic cavity is arranged in the machine body and communicated with the bottom end of the machine body;

the telescopic mechanism is arranged in the telescopic cavity;

the pressure plate mounting seat is mounted in the position, close to the bottom end, in the telescopic cavity;

the pressing plate mechanism is located at the bottom end of the machine body, the pressing plate mechanism is installed on the pressing plate installation seat, and the telescopic mechanism is used for driving the pressing plate mechanism to lift.

Preferably, the pressing plate mechanism includes:

the pressure plate mounting groove is formed in the bottom end of the pressure plate mounting seat;

the return spring is arranged in the pressure plate mounting groove;

the pressing plate is located at the bottom end of the machine body, the reset spring is connected with the pressing plate, and the working end of the telescopic mechanism is abutted to the top end of the pressing plate.

Preferably, the telescopic mechanism includes:

the rotating shaft mounting groove is formed in the top of the telescopic cavity;

the connecting rotating shaft is transversely arranged in the rotating shaft mounting groove;

the driving motor is arranged in the rotating shaft mounting groove, and the output end of the driving motor is connected with the connecting rotating shaft;

the two roller mounting ring seats are positioned in the telescopic cavity and close to the bottom end, and the roller mounting ring seats are fixedly mounted at the top end of the pressure plate mounting seat;

the roller is transversely arranged in the roller mounting ring seat;

the belt wheel is arranged on the connecting rotating shaft;

the transmission belt is arranged in the telescopic cavity and is respectively sleeved on the roller and the belt wheel;

the two spline grooves are oppositely arranged at two ends of the roller;

the transverse spline shafts are arranged in the spline grooves in equal quantity and are inserted into the spline grooves;

the first cam is arranged on the transverse spline shaft and abuts against the top end of the pressing plate.

Preferably, the telescopic mechanism further comprises:

the two mounting seats are symmetrically arranged in the telescopic cavity by taking the transmission belt as a center;

the vertical spline shaft is vertically arranged in the mounting seat;

the spline housing is arranged in the telescopic cavity, is positioned above the mounting seat and is sleeved outside the vertical spline shaft;

the lifting ring seat is sleeved outside the spline sleeve;

the first motor is arranged at the top end of the mounting seat;

the first screw is vertically arranged in the telescopic cavity, one end of the first screw is connected with the output end of the first motor, and the other end of the first screw is connected with the top in the telescopic cavity;

the limiting rod is arranged in parallel with the first screw rod, one end of the limiting rod is connected with the top of the telescopic cavity, and the other end of the limiting rod is connected with the top end of the mounting seat;

the lifting screw block is sleeved outside the first screw rod, the limiting rod penetrates through the lifting screw block, and the lifting ring seat is fixedly connected with the lifting screw sleeve;

the fixing ring is arranged in the telescopic cavity, the fixing ring is sleeved outside the vertical spline shaft, the fixing ring is positioned below the mounting seat, and the fixing ring is fixedly connected with the bottom end of the mounting seat;

the two clamping rods are symmetrically hinged outside the fixing ring by taking the vertical spline shaft as the center;

the thread groove is formed in the bottom end of the vertical spline shaft;

the second screw rod is connected in the thread groove;

the connecting ring is sleeved outside the second screw rod;

the two turnover arms are symmetrically hinged outside the connecting ring by taking the second screw as a center, and the ends, far away from the connecting ring, of the turnover arms are hinged on the clamping rod;

the friction plate is mounted at the bottom end of the second screw rod;

the friction block is arranged on the clamping rod;

the external thread is arranged on the transverse spline shaft;

the thread sleeve is sleeved on the external thread, the friction plate is arranged close to the thread sleeve, the thread sleeve is positioned between the two clamping rods, and the friction block is arranged close to the friction sleeve;

the locking block is arranged at the end, far away from the roller, of the transverse spline shaft;

the two vertical grooves are symmetrically formed in the inner wall of the telescopic cavity;

the lifting seat is connected in the vertical groove in a sliding manner;

the second cam is arranged at the inner end of the lifting seat through a rotating shaft, and the long radius of the second cam is larger than that of the first cam;

the locking groove is formed in the inner end of the second cam and is matched with the locking block;

the cross rod is fixedly arranged in the vertical groove and is positioned above the lifting seat;

the two transmission sleeves are sleeved on the cross rod;

the first spring is sleeved outside the cross rod and positioned between the two transmission sleeves, and two ends of the first spring are respectively connected with the transmission sleeves;

the two first connecting arms form a V-shaped structure, one end of each first connecting arm is hinged to the lifting seat, and the other end of each first connecting arm is hinged to the bottom end of the transmission sleeve;

one end of the lifting arm is fixedly connected with the lifting screw block, and the other end of the lifting arm extends into the vertical groove;

the two second connecting arms form a V-shaped structure, one end of each second connecting arm is hinged to the corresponding lifting arm, and the other end of each second connecting arm is hinged to the top end of the corresponding transmission sleeve;

the two first bevel gears are symmetrically arranged on the connecting rotating shaft by taking the belt wheel as a center;

the second helical gear is installed on the top end of the spline sleeve through a rotating shaft, and the second helical gear is matched with the first helical gear.

Preferably, the telescopic mechanism further comprises:

and the fixing columns are supported and installed between the mounting seat and the top in the telescopic cavity.

Preferably, the bottom end of part of the vertical groove penetrates through the side end of the machine body.

Preferably, the telescopic mechanism further comprises:

the baffle fixing seat is connected in the vertical groove in a sliding manner and is connected with the outer end of the lifting seat;

the first mounting groove is formed in the end, far away from the lifting seat, of the baffle fixing seat;

the two supporting rod mounting grooves are symmetrically formed in the baffle fixing seat far away from the lifting seat end by taking the first mounting groove as a center;

the baffle mounting seat is mounted in the first mounting groove and is exposed out of the notch of the first mounting groove;

the second mounting groove is formed in the baffle mounting seat;

the top block mounting groove is formed in the bottom end of the second mounting groove;

the mounting chamber is arranged in the baffle mounting seat and is positioned below the top block mounting groove;

the annular groove is formed in the inner wall of the mounting chamber and is far away from the end of the top block mounting groove;

an annular air bag mounted in the annular groove;

the first transmission plate is arranged in the mounting chamber and is attached to the annular air bag;

one end of the transmission rod extends into the mounting chamber and is connected with the first transmission plate, and the other end of the transmission rod extends into the top block mounting groove;

the ejecting block is arranged in the ejecting block mounting groove and is connected with the other end of the transmission rod;

the second spring is positioned in the top block mounting groove, the second spring is sleeved on the transmission rod, one end of the second spring is connected with the top block, and the other end of the second spring is connected with the bottom end of the top block mounting groove;

the turnover arm is installed in the second installation groove through a connecting shaft, the end, extending into the second installation groove, of the turnover arm is arranged in a semicircular manner, and the connecting shaft is eccentrically installed on the turnover arm;

the reset torsion spring is sleeved on the connecting shaft, one torsion arm end of the reset torsion spring is connected with the turnover arm, and the other torsion arm end of the reset torsion spring is connected with the inner wall of the second mounting groove;

the support rod is arranged in the support rod mounting groove through a third spring;

the pressing plate is positioned at the end, far away from the lifting seat, of the baffle fixing seat, and the baffle mounting seat penetrates through the pressing plate;

the second transmission plate is arranged in the second installation groove, the end, far away from the transmission rod, of the ejector block is connected with the second transmission plate, and the overturning arm is attached to the second transmission plate;

the locking rod mounting hole is communicated with the supporting rod mounting groove and the first mounting groove;

the locking rod is arranged in the locking rod mounting hole in a transmission way;

the locking groove is formed in the inner end of the supporting rod and is matched with the locking rod;

the air bag extending channel is formed in the side end of the baffle mounting seat and communicated with the annular groove, and the locking rod extends into the air bag extending channel;

the baffle is arranged on the turnover arm.

Preferably, the baffle is made of transparent materials.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a first schematic structural diagram of a telescoping mechanism according to the present invention;

FIG. 3 is a schematic structural view of a second telescoping mechanism according to the present invention;

FIG. 4 is an enlarged view of reference character A in FIG. 3;

FIG. 5 is a schematic view of the connection of a first connecting arm and a second connecting arm according to the present invention;

FIG. 6 is a third schematic structural view of a telescoping mechanism according to the present invention;

fig. 7 is an enlarged view of reference character B in fig. 6.

In the figure: 1. a body; 2. a telescoping chamber; 3. a telescoping mechanism; 4. a pressure plate mounting seat; 5. a platen mechanism; 6. a baffle plate; 21. a connecting ring; 22. a turning arm; 23. a friction plate; 24. a friction block; 25. a threaded sleeve; 26. a locking block; 27. a vertical slot; 28. a lifting seat; 29. a second cam; 20. a locking groove; 31. a rotating shaft mounting groove; 32. connecting the rotating shaft; 33. a drive motor; 34. a roller mounting ring seat; 35. a drum; 36. a pulley; 37. a transmission belt; 38. a spline groove; 39. a transverse spline shaft; 30. a first cam; 41. a mounting seat; 42. a vertical spline shaft; 43. a spline housing; 44. a lifting ring seat; 45. a first motor; 46. a first screw; 47. lifting screw blocks; 48. a fixing ring; 49. a clamping bar; 40. a second screw; 51. a pressure plate mounting groove; 52. a return spring; 53. pressing a plate; 54. a cross bar; 55. a transmission sleeve; 56. a first spring; 57. a first connecting arm; 58. a lifting arm; 59. a second connecting arm; 50. a first helical gear; 61. a second helical gear; 62. a baffle fixing seat; 63. a first mounting groove; 64. a supporting rod mounting groove; 65. a baffle mounting seat; 66. a second mounting groove; 67. a top block mounting groove; 68. an installation chamber; 69. an annular air bag; 60. a first drive plate; 71. a transmission rod; 72. a top block; 73. a second spring; 74. a turning arm; 75. a return torsion spring; 76. a support bar; 77. pressing a plate; 78. a second drive plate; 79. a lock lever; 70. and (4) locking the groove.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the present embodiment provides a telescopic oral cavity mechanics experiment pressure head, including:

the machine body 1 is detachably arranged at the working end of the universal mechanical machine;

the telescopic cavity 2 is arranged in the machine body 1, and the telescopic cavity 2 is communicated with the bottom end of the machine body 1;

the telescopic mechanism 3 is arranged in the telescopic cavity 2;

the pressure plate mounting seat 4 is mounted in the telescopic cavity 2 and is close to the bottom end;

the pressing plate mechanism 5 is located at the bottom end of the machine body 1, the pressing plate mechanism 5 is installed on the pressing plate installation seat 4, and the telescopic mechanism 3 is used for driving the pressing plate mechanism 5 to lift.

The working principle and the beneficial effects of the technical scheme are as follows:

the invention discloses a telescopic type oral cavity material mechanics experiment pressure head, wherein a machine body 1 is detachably arranged at the working end of a universal mechanics machine, the universal mechanics machine drives the machine body 1 to fall to a certain height away from a carrying platform, oral cavity materials are placed on the carrying platform, the pressing operation of a pressure plate mechanism 5 can be completed by selecting the universal mechanics machine or a telescopic mechanism 3, the universal mechanics machine drives the experiment pressure head to integrally press down, and the telescopic mechanism 3 positioned in a telescopic cavity 2 drives the pressure plate mechanism 5 to press down, so that the length of the experiment pressure head can be flexibly adjusted.

As shown in fig. 2, in one embodiment, the platen mechanism 5 includes:

the pressure plate mounting groove 51 is formed in the bottom end of the pressure plate mounting seat 4;

the return spring 52 is installed in the pressure plate installation groove 51;

the pressing plate 53 is located at the bottom end of the machine body 1, the return spring 52 is connected with the pressing plate 53, and the working end of the telescopic mechanism 3 is abutted to the top end of the pressing plate 53.

The working principle of the technical scheme is as follows:

the telescopic mechanism 3 in the telescopic cavity 2 works to abut against the top end of the pressing plate 53, and the reset spring 52 in the pressing plate mounting groove 51 is stretched to drive the pressing plate 53 to press down.

In one embodiment, the telescopic mechanism 3 comprises:

the rotating shaft installation groove 31 is formed in the top of the telescopic cavity 2;

the connecting rotating shaft 32 is transversely arranged in the rotating shaft mounting groove 31;

the driving motor 33, the driving motor 33 is installed in the rotating shaft installation groove 31, and the output end of the driving motor 33 is connected with the connecting rotating shaft 32;

the two roller mounting ring seats 34 are positioned in the telescopic cavity 2 and close to the bottom end, and the roller mounting ring seats 34 are fixedly mounted at the top end of the pressure plate mounting seat 4;

a roller 35, said roller 35 being mounted transversely within said roller mounting ring mount 34;

a pulley 36, the pulley 36 being mounted on the connecting shaft 32;

the transmission belt 37 is arranged in the telescopic cavity 2, and the transmission belt 37 is respectively sleeved on the roller 35 and the belt wheel 36;

the two spline grooves 38 are oppositely arranged at two ends of the roller 35;

a transverse spline shaft 39, the number of the transverse spline shafts 39 being equal to the number of the spline grooves 38, the transverse spline shaft 39 being inserted into the spline grooves 38;

and the first cam 30 is installed on the transverse spline shaft 39, and the first cam 30 is abutted to the top end of the pressure plate 53.

The working principle and the beneficial effects of the technical scheme are as follows:

driving motor 33 work, thereby the drive is installed and is rotated in pivot mounting groove 31 in the connection pivot 32 of driving motor 33 output, thereby the drive is installed and is rotated in connecting the epaxial band pulley 36 of pivot 32, band pulley 36 drives the cylinder 35 through drive belt 37 and rolls in cylinder installation ring seat 34, cylinder 35 drives transverse spline shaft 39 through spline groove 38 and rotates, thereby the drive is installed and is rotated in the first cam 30 on transverse spline shaft 39, first cam 30 supports and locates the clamp plate 53 top, thereby when first cam 30 centers on transverse spline shaft 39 circumferential direction, it is elevating movement to drive clamp plate 53, the completion is to the pushing down of oral cavity material on the objective platform, in order to play the flexible effect of clamp plate 53.

As shown in fig. 3 to 5, in one embodiment, the telescopic mechanism 3 further includes:

the two installation seats 41 are symmetrically arranged in the telescopic cavity 2 by taking the transmission belt 37 as a center;

the vertical spline shaft 42 is vertically installed in the installation seat 41;

the spline housing 43 is arranged in the telescopic cavity 2, the spline housing 43 is positioned above the mounting base 41, and the spline housing 43 is sleeved outside the vertical spline shaft 42;

the lifting ring seat 44 is sleeved outside the spline sleeve 43;

the first motor 45 is installed at the top end of the installation seat 41;

the first screw rod 46 is vertically arranged in the telescopic cavity 2, one end of the first screw rod 46 is connected with the output end of the first motor 45, and the other end of the first screw rod 46 is connected with the top in the telescopic cavity 2;

the limiting rod is arranged in parallel with the first screw 46, one end of the limiting rod is connected with the top of the telescopic cavity 2, and the other end of the limiting rod is connected with the top end of the mounting seat 41;

the lifting screw block 47 is sleeved outside the first screw rod 46, the limiting rod penetrates through the lifting screw block 47, and the lifting ring seat 44 is fixedly connected with the lifting screw sleeve 47;

the fixing ring 48 is arranged in the telescopic cavity 2, the fixing ring 48 is sleeved outside the vertical spline shaft 42, the fixing ring 48 is positioned below the mounting seat 41, and the fixing ring 48 is fixedly connected with the bottom end of the mounting seat 41;

the two clamping rods 49 are symmetrically hinged outside the fixing ring 48 by taking the vertical spline shaft 42 as the center;

the thread groove is formed at the bottom end of the vertical spline shaft 42;

the second screw 40, the said second screw 40 links to the said thread groove;

the connecting ring 21 is sleeved outside the second screw 40;

the two turnover arms 22 are symmetrically hinged outside the connecting ring 21 by taking the second screw 40 as a center, and the ends, far away from the connecting ring 21, of the turnover arms 22 are hinged on the clamping rods 49;

the friction plate 23 is mounted at the bottom end of the second screw 40;

the friction block 24, the said friction block 24 is mounted on the said clamping bar 49;

external threads which are opened on the transverse spline shaft 39;

the threaded sleeve 25 is sleeved on the external thread, the friction plate 23 is arranged close to the threaded sleeve 25, the threaded sleeve 25 is positioned between the two clamping rods 49, and the friction block 24 is arranged close to the friction sleeve 25;

a locking block 26, wherein the locking block 26 is arranged at the end of the transverse spline shaft 39 far away from the roller 35;

the two vertical grooves 27 are symmetrically arranged on the inner wall of the telescopic cavity 2;

the lifting seat 28 is connected in the vertical groove 27 in a sliding manner;

the second cam 29 is arranged at the inner end of the lifting seat 28 through a rotating shaft, and the long radius of the second cam 29 is larger than that of the first cam 30;

the locking groove 20 is formed in the inner end of the second cam 29, and the locking groove 20 is matched with the locking block 26;

a cross bar 54, wherein the cross bar 54 is fixedly installed in the vertical groove 27, and the cross bar 54 is positioned above the lifting seat 28;

the two transmission sleeves 55 are sleeved on the cross rod 54;

the first spring 56 is sleeved outside the cross rod 54, the first spring 56 is positioned between the two transmission sleeves 55, and two ends of the first spring 56 are respectively connected with the transmission sleeves 55;

the two first connecting arms 57 form a V-shaped structure, one end of each first connecting arm 57 is hinged to the lifting seat 28, and the other end of each first connecting arm 57 is hinged to the bottom end of the transmission sleeve 55;

one end of the lifting arm 58 is fixedly connected with the lifting screw block 47, and the other end of the lifting arm 58 extends into the vertical groove 27;

two second connecting arms 59, wherein the two second connecting arms 59 form a V-shaped structure, one end of each second connecting arm 59 is hinged to the corresponding lifting arm 58, and the other end of each second connecting arm 59 is hinged to the top end of the corresponding transmission sleeve 55;

the first bevel gears 50 are symmetrically arranged on the connecting shaft 32 by taking the belt wheel 36 as a center;

and the second bevel gear 61 is arranged at the top end of the spline housing 43 through a rotating shaft, and the second bevel gear 61 is matched with the first bevel gear 50.

The working principle and the beneficial effects of the technical scheme are as follows:

when the first cam 30 drives the pressing plate 53 to stretch but cannot press the oral cavity material on the loading platform, at this time, the first motor 45 works to further drive the first screw rod 46 installed at the output end of the first motor 45 to rotate, the first screw rod 46 drives the lifting screw block 47 sleeved thereon to do ascending motion along the limiting rod, the lifting screw block 47 synchronously drives the lifting ring seat 44 and the lifting arm 58 to do ascending motion, when the lifting ring seat 44 ascends, the spline sleeve 43 is driven to ascend, the spline sleeve drives the second helical gear 61 to ascend, the second helical gear 61 moves towards the direction close to the first helical gear 50, synchronously, the included angle between two second connecting arms 59 hinged with the lifting arm 58 becomes smaller, under the return action of the first spring 56, the two transmission sleeves 55 move towards each other, and further the included angle between the two first connecting arms 57 becomes smaller, the first connecting arms 57 push the lifting seat 28 to do descending motion along the vertical grooves 27, when the second bevel gear 61 and the first bevel gear 50 are engaged, the locking groove 20 is lowered to be opposite to the locking block 26, at this time, the first bevel gear 50 drives the second bevel gear 61 to rotate, the second bevel gear 61 drives the spline housing 43 to rotate in the lifting ring seat 44 through the rotating shaft, the spline housing 43 drives the vertical spline shaft 42 to rotate in the mounting seat 41, at this time, because the second screw 40 does not rotate, the second screw 40 extends out from the thread groove, the included angles of the two clamping rods 49 and the two turning arms 22 are all reduced, the thread sleeve 25 is limited by the friction plate 23 and the two friction blocks 24, at this time, the transverse spline shaft 39 is driven to extend out from the spline groove 38 through the matching of the thread sleeve 25 and the external thread, the transverse spline shaft 39 drives the locking block 26 to extend into the locking groove 20, so as to drive the second cam 29 to rotate by taking the rotating shaft as the center, the length radius of the second cam 29 is greater than that of the first cam 30, the second cam 29 abuts against the top end of the pressure plate 53, so that the expansion and contraction amount of the pressure plate 53 is increased, and the pressing distance of the pressure plate 23 is increased.

In one embodiment, the telescopic mechanism 3 further comprises:

and a plurality of fixing columns are supported and installed between the mounting seat 41 and the top in the telescopic cavity 2.

The beneficial effects of the above technical scheme are:

the setting of fixed post has improved the intensity in flexible chamber 2.

In one embodiment, the bottom end of a part of the vertical slots 27 is disposed through the side end of the machine body 1.

As shown in fig. 6 and 7, in one embodiment, the telescopic mechanism 3 further includes:

the baffle fixing seat 62 is connected in the vertical groove 27 in a sliding manner, and the baffle fixing seat 62 is connected with the outer end of the lifting seat 28;

the first installation groove 63 is formed in the end, far away from the lifting seat 28, of the baffle fixing seat 62;

the two support bar installation grooves 64 are symmetrically arranged at the end, away from the lifting seat 28, of the baffle fixing seat 62 by taking the first installation groove 63 as a center;

the baffle installation seat 65 is installed in the first installation groove 63, and the baffle installation seat 65 is exposed out of the notch of the first installation groove 63;

the second mounting groove 66 is formed in the baffle mounting seat 65;

the top block mounting groove 67 is formed in the groove bottom end of the second mounting groove 66;

the mounting chamber 68 is arranged in the baffle mounting seat 65, and the mounting chamber 68 is positioned below the top block mounting groove 67;

the annular groove is formed in the end, far away from the top block mounting groove 67, of the inner wall of the mounting chamber 68;

an annular bladder 69, the annular bladder 69 being mounted in the annular groove;

a first transmission plate 60, the first transmission plate 60 being mounted in the mounting chamber 68, the first transmission plate 60 being disposed adjacent to an annular air bag 69;

one end of the transmission rod 71 extends into the mounting chamber 68 and is connected with the first transmission plate 60, and the other end of the transmission rod 71 extends into the top block mounting groove 67;

the ejector block 72 is installed in the ejector block installation groove 67, and the ejector block 72 is connected with the other end of the transmission rod 71;

the second spring 73 is positioned in the top block installation groove 67, the second spring 73 is sleeved on the transmission rod 71, one end of the second spring 73 is connected with the top block 72, and the other end of the second spring 73 is connected with the bottom end of the top block installation groove 67;

the overturning arm 74 is installed in the second installation groove 66 through a connecting shaft, the overturning arm 74 extends into the second installation groove 66 and is arranged in a semicircular shape, and the connecting shaft is eccentrically installed on the overturning arm 74;

the reset torsion spring 75 is sleeved on the connecting shaft, one torsion arm end of the reset torsion spring 75 is connected with the turnover arm 74, and the other torsion arm end of the reset torsion spring 75 is connected with the inner wall of the second mounting groove 66;

the supporting rod 76 is arranged in the supporting rod mounting groove 64 through a third spring;

the pressing plate 77 is positioned at the end, away from the lifting seat 28, of the baffle fixing seat 62, and the baffle mounting seat 65 is arranged in a penetrating manner through the pressing plate 77;

the second transmission plate 78 is arranged in the second installation groove 66, the end, far away from the transmission rod 71, of the top block 72 is connected with the second transmission plate 78, and the overturning arm 74 is attached to the second transmission plate 78;

the locking rod mounting hole is communicated with the supporting rod mounting groove 64 and the first mounting groove 63;

the locking rod 79 is installed in the locking rod installation hole in a transmission mode;

the locking groove 70 is formed in the inner end of the supporting rod 76, and the locking groove 70 is matched with the locking rod 79;

the air bag extending channel is formed in the side end of the baffle mounting seat 65 and communicated with the annular groove, and the lock rod 79 extends into the air bag extending channel;

a baffle 6, said baffle 6 mounted on said invert arm 74.

The working principle and the beneficial effects of the technical scheme are as follows:

when the second cam 29 is used to increase the pressing distance of the pressing plate 53, the pressing plate 77 is manually pressed, so that the pressing plate 77 drives the supporting rod 76 to move in the supporting rod installation groove 64 in the contraction direction of the third spring, the overturning arm 74 loses the limit of the pressing plate 77, under the action of the reset torsion spring 75, the overturning arm 74 overturns around the connecting shaft, when the overturning arm 74 overturns downwards in the second installation groove 66, the second transmission plate 78 in the second installation groove 66 is pressed, so that the jacking block 72 in the jacking block installation groove 67 is driven to move in the contraction direction of the second spring 73, the jacking block 72 drives the first transmission plate 60 to press the annular air bag 69 in the annular groove in the installation chamber 68 through the transmission rod 71, the annular air bag 69 extends out of the air bag extension channel, so as to abut against the locking rod 79 to extend into the locking groove 70 along the locking rod installation hole, the locking rod 79 completes the limit of the supporting rod 76, and at the same time, upset arm 74 drives baffle 6 and turns over down to make baffle 6 perpendicular downwards, in order to shelter from the front end and the rear end of establishing the experiment pressure head, drive clamp plate 53 and push down when second cam 29, when clamp plate 53 crushed oral cavity material, baffle 6 sheltered from the front end and the rear end of establishing the experiment pressure head this moment, prevent that cracked oral cavity material from squirting out, cause the injury to the experimenter that lies in the experiment pressure head front end.

In one embodiment, the baffle 6 is made of a transparent material.

The beneficial effects of the above technical scheme are:

the baffle 6 is made of transparent material, so that observation is facilitated.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.