1. The utility model provides a safe firm type metal manipulator which characterized in that: the device comprises a transmission mechanism (1), a pre-tightening plate (2), a clamping plate (3), a resetting mechanism (4) and a pressing mechanism (5), wherein the transmission mechanism (1) is arranged above the clamping plate (3), the pressing mechanism (5) and the resetting mechanism (4) are arranged between the pre-tightening plate (2) and the clamping plate (3), the pre-tightening plate (2) is arranged on the inner side of the clamping plate (3), the transmission mechanism (1) comprises a mounting plate (12), the middle part of the upper surface of the mounting plate (12) is fixedly connected with a first motor (11), the output end of the first motor (11) penetrates through the mounting plate (12), the output end of the first motor (11) is rotatably connected with the mounting plate (12), the output end of the first motor (11) is fixedly connected with a clamping gear (16), the lower surface of the mounting plate (12) is slidably connected with a movable plate (13), and clamping racks (15) are arranged on two sides of the clamping gear (16) in a meshed manner, one end, far away from the clamping gear (16), of the clamping rack (15) is fixedly connected to the side wall of the moving plate (13), a abdicating groove (14) is formed in the side wall of the moving plate (13), the clamping rack (15) can slide along the abdicating groove (14), a fixing block (17) is fixedly connected to the lower end of the moving plate (13), and the fixing block (17) is fixedly connected with the outer wall of the clamping plate (3);

the reset mechanism (4) comprises a sliding block (41) and a reset rod (42), a transmission hole (31) is formed in the side wall of the clamping plate (3), one end of the sliding block (41) is fixedly connected to the side wall of the pre-tightening plate (2), the other end of the sliding block (41) penetrates through the transmission hole (31), the sliding block (41) is in sliding connection with the transmission hole (31), a reset groove (34) is formed in the inner wall of the clamping plate (3), the reset groove (34) is arranged on two sides of the sliding block (41), one end of the reset rod (42) is rotatably connected to the side wall of the sliding block (41), the other end of the reset rod (42) is arranged in the reset groove (34), and the reset rod (42) is in sliding connection with the side wall of the reset groove (34);

the reset mechanism (4) further comprises a friction plate (43) and a reset spring (44), the friction plate (43) is fixedly connected to one end, arranged in the reset groove (34), of the reset rod (42), two side portions of the friction plate (43) are in sliding connection with the reset groove (34), the reset spring (44) is arranged in the reset groove (34), one end of the reset spring (44) is fixedly connected to the outer wall of one side, far away from the reset rod (42), of the friction plate (43), and the other end of the reset spring (44) is fixedly connected to the bottom of the reset groove (34);

sliding block (41) lower surface middle part fixedly connected with transmission rack (45), transmission rack (45) are equipped with change gear (32), and change gear (32) rotate to be connected between transmission hole (31) both sides wall, and change gear (32) and transmission rack (45) meshing setting.

2. A safe and robust metal manipulator as claimed in claim 1, wherein: hold-down mechanism (5) are including lower rack plate (51), and the intracavity bottom of drive hole (31) is arranged in to lower rack plate (51) one end, and lower rack plate (51) and drive hole (31) lateral wall sliding connection, and under direction gear (32) was arranged in to lower rack plate (51), and lower rack plate (51) and direction gear (32) meshing setting.

3. A safe and robust metal manipulator as claimed in claim 2, wherein: hold-down mechanism (5) still include driving plate (52) and back-push board (53), and driving plate (52) fixed connection is arranged in the one end bottom in transmission hole (31) outside in rack plate (51) down, and driving plate (52) bottom fixed connection is on back-push board (53) upper surface, and pinch-off blades (3) lateral wall still is equipped with back-push hole (33), and back-push board (53) run through back-push hole (33), and back-push board (53) and back-push hole (33) sliding connection.

4. A safe and robust metal manipulator as claimed in claim 3, wherein: the pressing mechanism (5) further comprises a hydraulic cylinder (54) and a abutting inclined block (55), the hydraulic cylinder (54) is fixedly connected to the side wall of the end, far away from the transmission plate (52), of the reverse push plate (53), the telescopic end of the hydraulic cylinder (54) is fixedly connected with the abutting inclined block (55), a pre-tightening hole (23) is formed in the side wall of the pre-tightening plate (2), and the abutting inclined block (55) can slide along the side wall of the pre-tightening hole (23).

5. A safe and robust metal manipulator as claimed in claim 4, wherein: one side of the pre-tightening plate (2) far away from the clamping plate (3) is provided with an anti-skidding groove (21), the anti-skidding groove (21) is communicated with the pre-tightening hole (23), the anti-skidding plate (22) is connected with the anti-skidding groove (21) in a sliding mode, the lower end of the anti-skidding plate (22) is arranged in the pre-tightening hole (23), the lower end of the anti-skidding plate (22) is provided with an inclined plane matched with the abutting inclined block (55), and the abutting inclined block (55) can abut against the inclined plane at the lower end of the anti-skidding plate (22).

Background

The mechanical fingers can imitate some action functions of human hands and arms, and are used for grabbing, carrying objects or operating an automatic operating device of a tool according to a fixed program.

The manipulator is when snatching the square shape express delivery, because the multi-purpose paper case of express delivery encapsulates, the manipulator is snatching when pressing from both sides tightly, the too big express delivery box that then can press from both sides of clamp force, the clamp force undersize, the phenomenon that drops then can appear in the handling, cause the damage to the express delivery, at manipulator in transport express delivery case in-process, the phenomenon can appear rocking in machinery, because rocking of manipulator appears the phenomenon that the express delivery box dropped more easily in the handling, cause the damage to the article in the express delivery box.

Disclosure of Invention

The safe and stable metal manipulator can avoid the phenomenon that a carton is clamped to be broken by the manipulator due to too large clamping force in the carrying process of an express box body, articles in the carton are damaged, meanwhile, the manipulator can shake in the clamping and carrying process, the phenomenon that the express box drops in the carrying process is avoided, and further the phenomenon that the articles in the express box are damaged is avoided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a safe and stable metal manipulator comprises a transmission mechanism, a pre-tightening plate, a clamping plate, a reset mechanism and a pressing mechanism, wherein the transmission mechanism is arranged above the clamping plate, the pressing mechanism and the reset mechanism are both arranged between the pre-tightening plate and the clamping plate, the pre-tightening plate is arranged on the inner side of the clamping plate, the transmission mechanism comprises a mounting plate, the middle part of the upper surface of the mounting plate is fixedly connected with a first motor, the output end of the first motor penetrates through the mounting plate, the output end of the first motor is rotatably connected with the mounting plate, the output end of the first motor is fixedly connected with a clamping gear, the lower surface of the mounting plate is slidably connected with a movable plate, clamping racks are arranged on two sides of the clamping gear in a meshed mode, one end, far away from the clamping gear, of each clamping rack is fixedly connected to the side wall of the movable plate, a abdicating groove is formed in the side wall of the movable plate, each clamping rack can slide in the abdicating groove, the lower end of the movable plate is fixedly connected with a fixed block, and the fixed block is fixedly connected with the outer wall of the clamping plate.

Specifically, canceling release mechanical system includes sliding block and release link, and clamp plate lateral wall is equipped with the transmission hole, and sliding block one end fixed connection is at the pretension board lateral wall, and the other end of sliding block passes the transmission hole, and sliding block and transmission hole sliding connection, and the clamp plate inner wall is equipped with the reset groove, and the sliding block both sides are arranged in to the reset groove, and the one end of release link rotates to be connected at the sliding block lateral wall, and the reset groove is arranged in to the other end of release link, and release link and reset groove lateral wall sliding connection.

The reset mechanism further comprises a friction plate and a reset spring, the friction plate is fixedly connected to one end of the reset rod, the end of the friction plate is arranged in the reset groove, two sides of the friction plate are connected with the reset groove in a sliding mode, the reset spring is arranged in the reset groove, one end of the reset spring is fixedly connected to the outer wall of the friction plate, which is far away from one side of the reset rod, and the other end of the reset spring is fixedly connected to the bottom of the reset groove.

Specifically, the middle part of the lower surface of the sliding block is fixedly connected with a transmission rack, the transmission rack is provided with a turning gear, the turning gear is rotatably connected between two side walls of the transmission hole, and the turning gear is meshed with the transmission rack.

Specifically, hold-down mechanism includes rack plate down, and rack plate one end is arranged in the intracavity bottom in transmission hole down, and rack plate and transmission hole lateral wall sliding connection down, and under the direction gear was arranged in to rack plate down, and rack plate and direction gear meshing setting down.

The pressing mechanism further comprises a driving plate and a reverse pushing plate, the driving plate is fixedly connected with the lower rack plate and is arranged at the bottom of one end of the outer side of the transmission hole, the bottom of the driving plate is fixedly connected to the upper surface of the reverse pushing plate, the side wall of the clamping plate is further provided with a reverse pushing hole, the reverse pushing plate penetrates through the reverse pushing hole, and the reverse pushing plate is connected with the reverse pushing hole in a sliding mode.

Specifically, hold-down mechanism still includes the pneumatic cylinder and supports tight sloping block, and pneumatic cylinder fixed connection keeps away from the lateral wall of driving plate one end at the reverse push pedal, and the flexible end fixedly connected with of pneumatic cylinder supports tight sloping block, and the pretension board lateral wall is equipped with pretension hole, supports tight sloping block and can follow the side wall of pretension hole and slide.

Specifically, the one side that pinch-off plate was kept away from to the pretension board is equipped with the antiskid groove, and the antiskid groove link up with the pretension hole and sets up, and antiskid inslot portion sliding connection has the antiskid ribbed tile, and the pretension is arranged in to the antiskid ribbed tile lower extreme downthehole, and the antiskid ribbed tile lower extreme is equipped with and supports the inclined plane of tight sloping block looks adaptation, supports tight sloping block can support tightly with the inclined plane of antiskid ribbed tile lower extreme.

The invention has the beneficial effects that:

(1) according to the safe and stable metal manipulator, the lower rack plate drives the transmission plate to move towards the direction close to the side wall of the clamping plate, the lower end of the transmission plate drives the reverse push plate to synchronously move along the reverse push hole, the reverse push plate drives the hydraulic cylinder to synchronously move, the hydraulic cylinder drives the abutting inclined block to synchronously move, the abutting inclined block enters the pre-tightening hole, and the abutting inclined block extrudes the inclined plane at the lower end of the anti-slip plate, so that the anti-slip plate slides upwards along the direction of the anti-slip groove, meanwhile, the anti-slip plate generates upward friction force on the bottom of the side wall of an express box body, the phenomenon that the express box body shakes or falls in the carrying process of the manipulator is further avoided, and the phenomenon that articles in the express box body are damaged is avoided.

(2) According to the safe and stable metal manipulator, when the two clamping plates are far away from each other, the reset spring restores the original state, the reset spring pushes the friction plate to return to the original position, the friction plate pushes one end of the reset rod to return to the original position, the reset rod pushes the sliding block to return to the initial position, in the process, the pre-tightening plate is always in abutting contact with the express box body, the express box body is slowly released and placed, the phenomenon that the express box body shakes and topples over in the process of suddenly releasing and placing is avoided, meanwhile, the pre-tightening plate is more stable in the process of separating from the express box body, and articles in the express box body are further protected.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic perspective view of a safe and stable metal manipulator provided by the present invention.

Fig. 2 is a front cross-sectional view of fig. 1 provided in accordance with the present invention.

Fig. 3 is a cross-sectional view taken along the direction M-M of fig. 1 according to the present invention.

FIG. 4 is a connection diagram of the slider and the reset lever according to the present invention.

Fig. 5 is an enlarged view of a portion a of fig. 1 according to the present invention.

Fig. 6 is an enlarged view of the invention at B in fig. 2.

Fig. 7 is an enlarged view of the invention at C in fig. 2.

In the figure: 1. a transmission mechanism; 11. a first motor; 12. mounting a plate; 13. moving the plate; 14. a yielding groove; 15. clamping the rack; 16. clamping the gear; 17. a fixed block; 2. pre-tightening the plate; 21. an anti-slip groove; 22. an anti-skid plate; 23. pre-tightening the hole; 3. a clamping plate; 31. a drive bore; 32. a change gear; 33. reversely pushing the hole; 34. a reset groove; 4. a reset mechanism; 41. a slider; 42. a reset lever; 43. a friction plate; 44. a return spring; 45. a drive rack; 5. a hold-down mechanism; 51. a lower rack plate; 52. a drive plate; 53. a back-push plate; 54. a hydraulic cylinder; 55. the inclined block is tightly propped.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-7, a safe and stable metal manipulator comprises a transmission mechanism 1, a pre-tightening plate 2, a clamping plate 3, a reset mechanism 4 and a pressing mechanism 5, wherein the transmission mechanism 1 is arranged above the clamping plate 3, the pressing mechanism 5 and the reset mechanism 4 are both arranged between the pre-tightening plate 2 and the clamping plate 3, the pre-tightening plate 2 is arranged inside the clamping plate 3, the transmission mechanism 1 comprises a mounting plate 12, a first motor 11 is fixedly connected to the middle of the upper surface of the mounting plate 12, the output end of the first motor 11 penetrates through the mounting plate 12, the output end of the first motor 11 is rotatably connected with the mounting plate 12, a clamping gear 16 is fixedly connected to the output end of the first motor 11, a moving plate 13 is slidably connected to the lower surface of the mounting plate 12, clamping racks 15 are engaged with both sides of the clamping gear 16, one ends of the clamping racks 15, which are far away from the clamping gear 16, are fixedly connected to the side wall of the moving plate 13, the side wall of the movable plate 13 is provided with a abdicating groove 14, a clamping rack 15 can slide along the abdicating groove 14, the lower end of the movable plate 13 is fixedly connected with a fixed block 17, the fixed block 17 is fixedly connected with the outer wall of a clamping plate 3, a reset mechanism 4 is arranged to ensure that a pre-tightening plate 2 always keeps a contact and abutting state in the process of clamping the express box body, the pre-tightening plate 2 always keeps a contact state with the express box body in the process of loosening and placing, the express box body is slowly loosened and placed, the express box body is prevented from shaking in the process of loosening and placing, articles in the express box body are further protected, the express box body is ensured to be more stable in the process of carrying, the pressing mechanism 5 is arranged to ensure that the bottom of the side wall of the express box body generates upward friction force after the pre-tightening plate 2 is clamped, and further, the damage phenomenon of articles in the express box is avoided, a larger movement range is provided for the clamping rack 15 through the arrangement of the abdicating groove 14, the first motor 11 is started, when the output end of the first motor 11 rotates clockwise, the output end of the first motor 11 drives the clamping gear 16 to rotate clockwise, the clamping gear 16 drives the clamping racks 15 on two sides to move oppositely, the two moving plates 13 are pulled to approach each other simultaneously, the moving plates 13 drive the fixed blocks 17 to move synchronously, the two clamping plates 3 are pushed to approach each other through the fixed blocks 17, the express box is clamped, in the process that the two clamping plates 3 approach each other, the two pre-tightening plates 2 are driven to move oppositely at the same time, the two pre-tightening plates 2 contact and clamp the express box body firstly, the carton is prevented from being clamped by a manipulator due to overlarge clamping force, in the process that the two clamping plates 3 continue to move oppositely, the sliding block 41 slides along the transmission hole 31, the clamping plate 3 is close to the pre-tightening plate 2, when the output end of the first motor 11 rotates anticlockwise, the output end of the first motor 11 drives the clamping gear 16 to rotate anticlockwise, the clamping gear 16 drives the clamping racks 15 on two sides to move back to back, the two movable plates 13 are pushed to be away from each other, the movable plates 13 drive the fixed blocks 17 to move synchronously, the two clamping plates 3 are pushed to be away from each other through the fixed blocks 17, and loosening and placing actions after the express box is carried are achieved.

Specifically, the reset mechanism 4 includes a sliding block 41 and a reset rod 42, the side wall of the clamping plate 3 is provided with a transmission hole 31, one end of the sliding block 41 is fixedly connected to the side wall of the pre-tightening plate 2, the other end of the sliding block 41 penetrates through the transmission hole 31, the sliding block 41 is slidably connected with the transmission hole 31, the inner wall of the clamping plate 3 is provided with a reset groove 34, the reset groove 34 is arranged on two sides of the sliding block 41, one end of the reset rod 42 is rotatably connected to the side wall of the sliding block 41, the other end of the reset rod 42 is arranged in the reset groove 34, the reset rod 42 is slidably connected with the side wall of the reset groove 34, the two clamping plates 3 continue to move in opposite directions, the sliding block 41 slides along the transmission hole 31, the clamping plates 3 are close to the pre-tightening plate 2, the sliding block 42 is close to the sliding block and moves synchronously with the reset rod 41, and the reset rod 42 and the sliding block 41 rotate relatively.

Specifically, the reset mechanism 4 further comprises a friction plate 43 and a reset spring 44, the friction plate 43 is fixedly connected to one end of the reset rod 42 disposed in the reset groove 34, two side portions of the friction plate 43 are slidably connected with the reset groove 34, the reset spring 44 is disposed in the reset groove 34, one end of the reset spring 44 is fixedly connected to the outer wall of one side of the friction plate 43 away from the reset rod 42, the other end of the reset spring 44 is fixedly connected to the bottom of the reset groove 34, the reset rod 42 and the sliding block 41 rotate relatively, one end of the reset rod 42 disposed in the reset groove 34 pushes the friction plate 43 to move towards the bottom of the reset groove 34, friction is generated between the friction plate 43 and two side walls of the reset groove 34, so as to ensure that the pretightening plate 2 moves more stably, avoid the phenomenon that the pretightening plate 2 shakes, avoid the drop phenomenon of the express box, further ensure that the articles in the express box are not damaged, the friction plate 43 extrudes the reset spring 44, reset spring 44 is compressed, and through reset spring 44's elasticity promotion friction plate 43 and release link 42, guarantee to be in the tight state of support through release link 42 and sliding block 41 in the clamping process, sliding block 41 promotes pretension board 2, guarantees to be in contact and the tight state of support with the express delivery box always in the clamping process pretension board 2, avoids the manipulator to press from both sides the carton because of the clamp force is too big.

Specifically, the middle part of the lower surface of the sliding block 41 is fixedly connected with a transmission rack 45, the transmission rack 45 is provided with a change gear 32, the change gear 32 is rotatably connected between two side walls of the transmission hole 31, the change gear 32 is meshed with the transmission rack 45, the transmission rack 45 is driven to move synchronously when the sliding block 41 moves, and the transmission rack 45 drives the change gear 32 to rotate anticlockwise.

Specifically, hold-down mechanism 5 includes lower rack plate 51, and lower rack plate 51 one end is arranged in the intracavity bottom of drive hole 31, and lower rack plate 51 and drive hole 31 lateral wall sliding connection, and lower rack plate 51 is arranged in under change gear 32, and lower rack plate 51 and change gear 32 meshing setting, and drive rack 45 drives change gear 32 anticlockwise rotation, drives down rack plate 51 through change gear 32 and moves to the direction opposite with sliding block 41.

Specifically, hold-down mechanism 5 still includes driving plate 52 and back-push plate 53, driving plate 52 fixed connection is in the one end bottom of arranging the drive hole 31 outside in rack plate 51 down, driving plate 52 bottom fixed connection is on back-push plate 53 upper surface, 3 lateral walls of clamp plate still are equipped with back-push hole 33, back-push plate 53 runs through back-push hole 33, and back-push plate 53 and back-push hole 33 sliding connection, make down rack plate 51 unanimous with the motion of back-push plate 53 through setting up driving plate 52, lower rack plate 51 drives driving plate 52 and moves to being close to 3 lateral walls directions of clamp plate, driving plate 52 lower extreme drives back-push plate 53 along the synchronous motion of back-push hole 33.

Specifically, the pressing mechanism 5 further comprises a hydraulic cylinder 54 and a abutting inclined block 55, the hydraulic cylinder 54 is fixedly connected to the side wall of the counter plate 53 far away from one end of the transmission plate 52, the telescopic end of the hydraulic cylinder 54 is fixedly connected with the abutting inclined block 55, the side wall of the pre-tightening plate 2 is provided with the pre-tightening hole 23, the abutting inclined block 55 can slide along the side wall of the pre-tightening hole 23, the counter plate 53 drives the hydraulic cylinder 54 to move synchronously, the hydraulic cylinder 54 drives the abutting inclined block 55 to move synchronously, and the abutting inclined block 55 enters the pre-tightening hole 23.

Specifically, the one side that pinch-off plate 3 was kept away from to pretension board 2 is equipped with antiskid groove 21, antiskid groove 21 link up the setting with pretension hole 23, antiskid groove 21 inside sliding connection has antiskid ribbed tile 22, antiskid ribbed tile 22 lower extreme is arranged in pretension hole 23, antiskid ribbed tile 22 lower extreme is equipped with and supports the inclined plane of tight sloping block 55 looks adaptation, support tight sloping block 55 can support tightly with the inclined plane of antiskid ribbed tile 22 lower extreme, support tight sloping block 55 and get into pretension hole 23 in, and support the inclined plane of tight sloping block 55 extrusion antiskid ribbed tile 22 lower extreme, make antiskid ribbed tile 22 upwards slide along antiskid groove 21 direction, antiskid ribbed tile 22 produces ascending frictional force to express delivery box lateral wall bottom simultaneously, further avoid the express delivery box to appear rocking or the phenomenon that drops in this manipulator handling, the article of having avoided the express delivery incasement appear damaging the phenomenon.

When the express box is used, the first motor 11 is started, when the output end of the first motor 11 rotates clockwise, the output end of the first motor 11 drives the clamping gear 16 to rotate clockwise, the clamping gear 16 drives the clamping racks 15 on the two sides to move in opposite directions, the two moving plates 13 are pulled to approach each other at the same time, the moving plates 13 drive the fixed blocks 17 to move synchronously, the two clamping plates 3 are pushed to approach each other through the fixed blocks 17, so that the express box is clamped, in the process that the two clamping plates 3 approach each other, the two pre-tightening plates 2 are simultaneously driven to move in opposite directions, the two pre-tightening plates 2 contact and clamp the express box body first, the carton is prevented from being clamped and broken by a manipulator due to overlarge clamping force, in the process that the two clamping plates 3 continue to move in opposite directions, the sliding block 41 slides along the transmission hole 31, the clamping plates 3 approach the pre-tightening plates 2, and the reset rod 42 approaches the sliding block 41 and moves synchronously, and the reset rod 42 and the sliding block 41 rotate relatively, one end of the reset rod 42, which is arranged in the reset groove 34, pushes the friction plate 43 to move towards the bottom of the reset groove 34, friction force is generated between the friction plate 43 and two side walls of the reset groove 34, so that the pre-tightening plate 2 can move more stably, the pre-tightening plate 2 can be prevented from shaking, the express box can be prevented from falling off, further, articles in the express box can be prevented from being damaged, the friction plate 43 extrudes the reset spring 44, the reset spring 44 is compressed, the friction plate 43 and the reset rod 42 are pushed by the elasticity of the reset spring 44, the pre-tightening plate 2 and the sliding block 41 can be kept in a tight state in the clamping process, the sliding block 41 pushes the pre-tightening plate 2, the pre-tightening plate 2 and the express box can be kept in a tight state all the time in the clamping process, the carton can be prevented from being broken due to the overlarge clamping force of a manipulator, and the sliding block 41 can drive the rack 45 to move synchronously, the transmission rack 45 drives the direction change gear 32 to rotate anticlockwise, the lower rack plate 51 is driven by the direction change gear 32 to move in the direction opposite to the sliding block 41, the lower rack plate 51 drives the transmission plate 52 to move in the direction close to the side wall of the clamping plate 3, the lower end of the transmission plate 52 drives the counter plate 53 to move synchronously along the counter hole 33, the counter plate 53 drives the hydraulic cylinder 54 to move synchronously, the hydraulic cylinder 54 drives the abutting inclined block 55 to move synchronously, the abutting inclined block 55 enters the pre-tightening hole 23, and the abutting inclined block 55 extrudes the inclined plane at the lower end of the antiskid plate 22, so that the antiskid plate 22 generates upward friction force on the bottom of the side wall of the express box body, the phenomenon that the express box body shakes or falls off in the mechanical arm carrying process is further avoided, and the phenomenon that articles in the express box body are damaged is avoided;

when the output end of the first motor 11 rotates anticlockwise, the output end of the first motor 11 drives the clamping gear 16 to rotate anticlockwise, the clamping gear 16 drives the clamping racks 15 on the two sides to move back and forth, the two moving plates 13 are pushed to be away from each other, the moving plates 13 drive the fixed blocks 17 to move synchronously, the two clamping plates 3 are pushed to be away from each other through the fixed blocks 17, the releasing and placing action after the express box is carried is realized, when the two clamping plates 3 are away from each other, the reset spring 44 restores the original state, the reset spring 44 pushes the friction plate 43 to return to the original position, the friction plate 43 pushes one end of the reset rod 42 to return to the original position, the reset rod 42 pushes the sliding block 41 to return to the original position, the pretightening plate 2 is always in contact with the express box in the process, the express box is slowly released and placed, and the shake of the express box in the releasing and placing process is avoided, further protect the inside article of express delivery box.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.