1. The over-torsion detection device adopting spring resetting is characterized by comprising a lower seat (1), wherein the lower seat (1) is connected with an upper seat (3) capable of rotating around a vertical shaft through a first rotating connection mechanism (2), a vertical passing channel (41) positioned in the middle is arranged after the lower seat (1) and the upper seat (3) are assembled together, an accommodating space (42) is arranged between the upper end of the lower seat (1) and the lower end of the upper seat (3), the lower seat (1) is connected with a transverse shaft (51) positioned in the accommodating space (42), a sliding block (52), a first compression spring (53) used for elastically pressing the sliding block (52) from one side and a second compression spring (54) used for elastically pressing the sliding block (52) from the other side are arranged on the transverse shaft (51), and the elastic coefficients of the first compression spring (53) and the second compression spring (54) are different, the upper seat (3) is connected with a shifting fork (6) which is arranged in the accommodating space (42) and is used for rotating along with the upper seat (3), the shifting fork (6) is provided with a fork opening (61) used for forking the sliding block (52), and a displacement sensor assembly (7) used for detecting whether the lower seat (1) and the upper seat (3) rotate excessively relatively is further arranged between the lower seat (1) and the upper seat (3).

2. The spring-return-based overtorque detection device according to claim 1, wherein a waterproof case (10) covering the accommodation space (42) is connected to the outer periphery of the upper seat (3), or a waterproof case (10) covering the accommodation space (42) is connected to the outer periphery of the lower seat (1).

3. The over-twisting detection device adopting the spring return as claimed in claim 1, wherein the displacement sensor assembly (7) comprises a sensing plate (71) arranged at the lower end of the upper seat (3) and a sensor switch (72) arranged at the upper end of the lower seat (1) and used for detecting whether the sensing plate (71) is above the sensing plate, and the sensing plate (71) is arc-shaped so as to be away from the position above the sensor switch (72) when the lower seat (1) and the upper seat (3) rotate excessively relatively.

4. The over-twisting detection device adopting the spring return as claimed in claim 1, wherein the lower seat (1) is provided with a shaft hole seat (81) for allowing two ends of the transverse shaft (51) to pass through, and two ends of the transverse shaft (51) are connected with pre-tightening nuts (82).

5. The spring-return over-twist detection device according to claim 1, wherein the number of the shift forks (6) is two, the upper and lower ends of the slider (52) are respectively provided with a vertical cylinder (521), the vertical cylinder (521) is sleeved with a drag reduction bearing (522), and the fork opening (61) is used for being forked outside the drag reduction bearing (522).

6. The spring-return-based over-torque detection device according to claim 5, wherein the transverse shafts (51) connected to the lower seat (1) are arranged in a centrosymmetric manner, each transverse shaft (51) is provided with a sliding block (52), a first compression spring (53) for elastically pressing the sliding block (52) from one side, and a second compression spring (54) for elastically pressing the sliding block (52) from the other side, the two first compression springs (53) are arranged in a centrosymmetric manner, the two second compression springs (54) are arranged in a centrosymmetric manner, and the shifting fork (6) is correspondingly provided with two fork openings (61).

7. An over-twisting detection device adopting spring return according to any one of claims 1-6, characterized in that the middle of the lower seat (1) is provided with a first annular wall body (12) extending upwards, the middle of the upper seat (3) is provided with a second annular wall body (32) extending downwards for enclosing the first annular wall body (12), the first rotary connection mechanism (2) is a deep groove ball bearing arranged between the inner side wall of the second annular wall body (32) and the outer side wall of the first annular wall body (12), and the shift fork (6) is arranged on the outer side wall of the second annular wall body (32).

8. The spring-return-based torsion detection device according to claim 7, wherein the number of the deep groove ball bearings is two, the outer sidewall of the lower end of the first annular wall (12) is provided with a first annular step (121) for limiting the inner ring of the first deep groove ball bearing, the inner sidewall of the lower end of the second annular wall (32) is provided with a second annular step (321) for clamping on the outer ring of the first deep groove ball bearing, the inner sidewall of the upper end of the second annular wall (32) is provided with a third annular step (322) for limiting the outer ring of the second deep groove ball bearing, and the inner ring of the second deep groove ball bearing is used for clamping on the outer sidewall of the first annular wall (12).

Background

The centrally-driven mud scraper and suction machine requires the used over-torque protection device to act quickly and reliably due to the structural characteristics of the centrally-driven mud scraper and suction machine, has long service life, can adapt to the influences of high and low temperatures, rain and snow weather and the like during outdoor work, can quickly detect reversal and torque overload, and can output electric signals for controlling a system to alarm and stop operating;

most of common mechanical overtorque protection devices such as torque limiters in the market at present are friction plate type, ball type or thimble type structures, can not quickly detect reverse rotation (the reverse rotation torque value is equal to the forward rotation torque and then can react, and the mud scraper is damaged at this moment), and the conventional model can not output an electric signal, and the model capable of outputting the electric signal is imported equipment and is expensive; in addition, the over-twisting protection device using the torsion spring is thick in wire diameter, difficult to manufacture, poor in size precision and difficult to completely position, so that the over-twisting protection device is easy to loosen, left-handed and right-handed springs need to be customized respectively to adapt to opposite rotation directions, and the application range is narrow.

Disclosure of Invention

The invention overcomes the defects of the technology and provides the over-twisting detection device adopting the spring for resetting.

In order to achieve the purpose, the invention adopts the following technical scheme:

an over-torsion detection device adopting spring resetting comprises a lower seat 1, wherein the lower seat 1 is connected with an upper seat 3 capable of rotating around a vertical shaft through a first rotating connection mechanism 2, a vertical passing channel 41 positioned in the middle is arranged after the lower seat 1 and the upper seat 3 are assembled together, an accommodating space 42 is arranged between the upper end of the lower seat 1 and the lower end of the upper seat 3, the lower seat 1 is connected with a transverse shaft 51 positioned in the accommodating space 42, the transverse shaft 51 is provided with a sliding block 52, a first compression spring 53 used for elastically pressing the sliding block 52 from one side and a second compression spring 54 used for elastically pressing the sliding block 52 from the other side, the elastic coefficients of the first compression spring 53 and the second compression spring 54 are different, the upper seat 3 is connected with a shifting fork 6 positioned in the accommodating space 42 and used for rotating along with the upper seat 3, the shifting fork 6 is provided with a fork opening 61 used for forking the sliding block 52, and a displacement sensor assembly 7 for detecting whether the lower seat 1 and the upper seat 3 rotate excessively relatively is further arranged between the lower seat and the upper seat.

Preferably, a waterproof case 10 for covering the accommodating space 42 is connected to the outer periphery of the upper seat 3, or a waterproof case 10 for covering the accommodating space 42 is connected to the outer periphery of the lower seat 1.

Preferably, the displacement sensor assembly 7 includes a sensing plate 71 disposed at a lower end of the upper seat 3 and a sensor switch 72 disposed at an upper end of the lower seat 1 for detecting whether the sensing plate 71 is above the sensing plate, and the sensing plate 71 is arc-shaped so as to be away from a position above the sensor switch 72 when the lower seat 1 and the upper seat 3 rotate excessively relatively.

Preferably, the lower base 1 is provided with a shaft hole base 81 for allowing two ends of the transverse shaft 51 to pass through, and two ends of the transverse shaft 51 are connected with a pre-tightening nut 82.

Preferably, the two shifting forks 6 are vertically distributed in parallel, the upper end and the lower end of the sliding block 52 are respectively provided with a vertical cylinder 521, the vertical cylinder 521 is sleeved with a drag reduction bearing 522, and the fork opening 61 is used for being forked outside the drag reduction bearing 522.

Preferably, the two transverse shafts 51 connected to the lower seat 1 are arranged in a central symmetrical manner, each transverse shaft 51 is provided with a sliding block 52, a first compression spring 53 for elastically pressing the sliding block 52 from one side, and a second compression spring 54 for elastically pressing the sliding block 52 from the other side, the two first compression springs 53 are arranged in a central symmetrical manner, the two second compression springs 54 are arranged in a central symmetrical manner, and the shifting fork 6 is correspondingly provided with two fork openings 61.

Preferably, the middle part of lower seat 1 is equipped with the first annular wall body 12 of upwards extending, the middle part of upper seat 3 is equipped with downwardly extending and is used for enclosing the outer second annular wall body 32 of first annular wall body 12, first rotation coupling mechanism 2 is for setting up the inside wall of second annular wall body 32 with deep groove ball bearing between the lateral wall of first annular wall body 12, shift fork 6 sets up second annular wall body 32 lateral wall.

Preferably, the number of the deep groove ball bearings is two, the outer side wall of the lower end of the first annular wall body 12 is provided with a first annular step 121 used for limiting the inner ring of the first deep groove ball bearing on the first annular step, the inner side wall of the lower end of the second annular wall body 32 is provided with a second annular step 321 used for clamping the outer ring of the first deep groove ball bearing, the inner side wall of the upper end of the second annular wall body 32 is provided with a third annular step 322 used for limiting the outer ring of the second deep groove ball bearing on the second annular step, and the inner ring of the second deep groove ball bearing is used for clamping the outer side wall of the first annular wall body 12.

Compared with the prior art, the invention has the beneficial effects that:

1. the structure of the scheme is simple and easy to realize, and the arrangement of the first rotating connecting mechanism is convenient for the upper seat to rotate relative to the lower seat during the over-torque detection; the displacement sensor assembly is arranged to detect whether the upper seat and the lower seat rotate excessively relatively, and output a signal outwards when the upper seat and the lower seat rotate excessively relatively so as to facilitate external over-torsion protection control; the arrangement of the first compression spring and the second compression spring is convenient for resetting between the upper seat and the lower seat after over-torsion protection after a motor stops rotating, in addition, because the elastic coefficients of the first compression spring and the second compression spring are different, the resistance of the compression spring when the upper seat rotates forwards relative to the lower seat is different from the resistance of the compression spring when the upper seat rotates backwards relative to the lower seat, in specific implementation, the situation with larger resistance can be used for detecting whether the transmission shaft mechanism rotates forwards or not over-torsion, and the situation with smaller resistance is used for detecting whether the transmission shaft mechanism rotates backwards or not over-torsion, so when the reverse rotation over-torsion is detected, the upper seat can rotate and rotate over relative to the lower seat more easily, and can trigger a displacement sensor assembly to input signals outwards more quickly so as to facilitate external over-torsion protection control, and the practicability is good.

2. The setting of shift fork about the present case, the more balanced centre gripping slider of being convenient for, the fork mouth passes through drag reduction bearing and drives the slider motion, it has reduced resistance each other, is favorable to making shift fork rotation, slider lateral motion more smooth and easy.

3. The first annular step, the second annular step and the third annular step are convenient for positioning the deep groove ball bearing and are beneficial to specific implementation.

Drawings

Fig. 1 is one of the structural diagrams of the present case.

Fig. 2 is a second structural diagram of the present invention.

Fig. 3 is a view of the lower seat of fig. 1.

Fig. 4 is a top view of fig. 1.

Fig. 5 is a diagram of a use state of the present disclosure.

Detailed Description

The features of the present invention and other related features are further described in detail below by way of examples to facilitate understanding by those skilled in the art:

as shown in fig. 1 to 5, an over-twisting detection device adopting spring return comprises a lower seat 1, the lower seat 1 is connected with an upper seat 3 capable of rotating around a vertical shaft through a first rotating connection mechanism 2, a vertical passage 41 located in the middle is arranged after the lower seat 1 and the upper seat 3 are assembled together, an accommodating space 42 is arranged between the upper end of the lower seat 1 and the lower end of the upper seat 3, the lower seat 1 is connected with a horizontal shaft 51 located in the accommodating space 42, the horizontal shaft 51 is provided with a sliding block 52, a first compression spring 53 for elastically pressing the sliding block 52 from one side and a second compression spring 54 for elastically pressing the sliding block 52 from the other side, the elastic coefficients of the first compression spring 53 and the second compression spring 54 are different, the upper seat 3 is connected with a shifting fork 6 located in the accommodating space 42 and used for rotating together with the upper seat 3, the shifting fork 6 is provided with a fork opening 61 for forking the sliding block 52, and a displacement sensor assembly 7 for detecting whether the lower seat 1 and the upper seat 3 rotate excessively relatively is further arranged between the lower seat 1 and the upper seat 3.

The device is suitable for being connected with a driving device of a central driving mud scraping and sucking machine, wherein in the figure 5, the lower seat 1 is connected with a second-stage speed reducer positioned on the lower side, the upper seat 3 is connected with a first-stage speed reducer positioned on the upper side, and a transmission shaft mechanism between the first-stage speed reducer and the second-stage speed reducer passes through the vertical passing channel 41.

As mentioned above, the structure of the scheme is simple and easy to realize, and the arrangement of the first rotating connecting mechanism 2 is convenient for the upper seat 3 to rotate relative to the lower seat 1 during the over-torsion detection; the displacement sensor assembly 7 is arranged to detect whether the upper seat 3 and the lower seat 1 rotate excessively relative to each other, and output a signal outwards when the upper seat 3 and the lower seat rotate excessively relative to each other so as to facilitate external over-torsion protection control; the first compression spring 53 and the second compression spring 54 are provided to facilitate the return between the upper seat 3 and the lower seat 1 after the over-torque protection, such as the motor stopping, and, in addition, because the elastic coefficients of the first compression spring 53 and the second compression spring 54 are different, the resistance of the compression spring when the upper seat 3 rotates forwards relative to the lower seat 1 is different from the resistance of the compression spring when the upper seat 3 rotates backwards relative to the lower seat 1, in specific implementation, the situation with larger resistance can be used for detecting whether the transmission shaft mechanism rotates forwards or not in an over-twisting way, and the situation with smaller resistance is used for detecting whether the reverse rotation of the transmission shaft mechanism is over-twisted, so that when the reverse rotation over-twisted is detected, the upper seat 3 can more easily rotate relative to the lower seat 1 and rotate excessively, the displacement sensor assembly 7 can be triggered to input signals outwards more quickly so as to facilitate external over-torque protection control, and the practicability is good.

As described above, in practical implementation, the waterproof housing 10 for covering the accommodating space 42 is connected to the outer periphery of the upper seat 3, or the waterproof housing 10 for covering the accommodating space 42 is connected to the outer periphery of the lower seat 1.

As shown in fig. 1 and 2, the displacement sensor assembly 7 includes a sensing plate 71 disposed at a lower end of the upper seat 3 and a sensor switch 72 disposed at an upper end of the lower seat 1 for detecting whether the sensing plate 71 is above the upper end, the sensing plate 71 is arc-shaped so as to be away from a position above the sensor switch 72 when the lower seat 1 and the upper seat 3 rotate excessively, and in particular, the arc-shaped length of the sensing plate 71 can be changed to suit a specific application.

As shown in fig. 2, the lower base 1 is provided with a shaft hole seat 81 through which both ends of the transverse shaft 51 pass, and both ends of the transverse shaft 51 are connected with a pre-tightening nut 82, so that when the lower base is specifically assembled, the transverse shaft 51 is fixed after the first compression spring 53, the slider 52 and the second compression spring 54 are assembled on the transverse shaft 51, and therefore, the lower base has good practicability.

As described above, in the specific implementation, the two shifting forks 6 are vertically and parallelly distributed, the upper end and the lower end of the slider 52 are respectively provided with the vertical cylinder 521, the drag reduction bearing 522 is sleeved on the vertical cylinder 521, and the fork opening 61 is used for being forked outside the drag reduction bearing 522.

As mentioned above, the arrangement of the upper and lower shifting forks 6 facilitates the relatively balanced clamping of the sliding block 52, and the fork openings 61 drive the sliding block 52 to move through the drag reduction bearings 522, so that the mutual resistance is reduced, and the rotation of the shifting forks 6 and the relatively smooth transverse movement of the sliding block 52 are facilitated.

As shown in fig. 2, in a specific implementation, two transverse shafts 51 connected to the lower seat 1 are arranged in a central symmetrical manner, each transverse shaft 51 is provided with a sliding block 52, a first compression spring 53 for elastically pressing the sliding block 52 from one side, and a second compression spring 54 for elastically pressing the sliding block 52 from the other side, the two first compression springs 53 are arranged in a central symmetrical manner, the two second compression springs 54 are arranged in a central symmetrical manner, and the shift fork 6 is correspondingly provided with two fork openings 61.

As shown in fig. 1, 3, and 4, in specific implementation, a first annular wall 12 extending upward is disposed in the middle of the lower seat 1, a second annular wall 32 extending downward and surrounding the first annular wall 12 is disposed in the middle of the upper seat 3, the first rotating connection mechanism 2 is a deep groove ball bearing disposed between an inner side wall of the second annular wall 32 and an outer side wall of the first annular wall 12, so as to facilitate specific implementation, and the shift fork 6 is disposed on an outer side wall of the second annular wall 32.

As described above, in specific implementation, there are two deep groove ball bearings, as shown in fig. 3, the outer side wall of the lower end of the first annular wall 12 is provided with a first annular step 121 for limiting the inner ring of the first deep groove ball bearing thereon, as shown in fig. 4, the inner side wall of the lower end of the second annular wall 32 is provided with a second annular step 321 for being clamped on the outer ring of the first deep groove ball bearing, the inner side wall of the upper end of the second annular wall 32 is provided with a third annular step 322 for limiting the outer ring of the second deep groove ball bearing thereon, and the inner ring of the second deep groove ball bearing is used for being clamped on the outer side wall of the first annular wall 12.

As described above, the first annular step 121, the second annular step 321, and the third annular step 322 facilitate positioning of the deep groove ball bearing, which is beneficial to specific implementation.

As described above, the present disclosure is directed to an over-twisting detection device using a spring for return, and all technical solutions having the same or similar structure to the present disclosure should be considered as falling within the scope of the present disclosure.