CN224002972U - Driving connection mechanism - Google Patents

Abstract

The application discloses a driving connection mechanism, and relates to the technical field of power systems. The driving connecting mechanism comprises a driving mechanism, a push-pull rod and a valve cylinder mechanism, wherein the valve cylinder mechanism is provided with a piston rod, the driving mechanism is provided with a driving shaft, the piston rod, the push-pull rod and the driving shaft are linearly connected to form a connecting link, a switching assembly is connected between the piston rod and the push-pull rod and between the push-pull rod and the driving shaft, and the switching assembly is provided with spherical pairs connected along the connecting direction of the connecting link. The application can avoid the phenomenon of blocking when the valve cylinder mechanism and the driving mechanism are driven.

Description

Driving connection mechanism

Technical Field

The application relates to the technical field of power systems, in particular to a driving connection mechanism.

Background

As shown in fig. 1-2, a power system generally comprises a valve cylinder mechanism 1, a push-pull rod 2 and a driving mechanism 3. The valve cylinder mechanism 1 is integrally formed with a control valve 1-1 and a power cylinder 1-2, the power cylinder 1-2 having a piston rod 1-21. The drive mechanism 3 has a drive shaft 3-1. The piston rod 1-21, the push-pull rod 2 and the drive shaft 3-1 are linearly connected to form a connection link S1. Generally, the control valve 1-1 controls the power cylinder 1-2 to extend or retract the piston rod 1-21 of the power cylinder 1-2 to drive the push-pull rod 2, so that the push-pull rod 2 drives the driving shaft 3-1 to move away from or close to the power cylinder 1-2 along the axial direction of the driving shaft 3-1, and further enables the driving mechanism 3 to act.

However, as shown in fig. 1-2, the valve rod mechanism 1 and the driving mechanism 3 are separately installed, so that it is difficult to ensure that the piston rod 1-21 of the valve cylinder mechanism 1 and the driving shaft 3-1 of the driving mechanism 3 are on the same axis during installation, which can cause the easy occurrence of a seizing phenomenon in the transmission between the valve cylinder mechanism 1 and the driving mechanism 3, thereby causing easy deformation and cracking of the push-pull rod 2.

Therefore, how to avoid the jamming phenomenon during the transmission between the valve cylinder mechanism and the driving mechanism is still a technical problem to be solved by those skilled in the art.

Disclosure of utility model

In view of the above, the present application provides a driving connection mechanism, which includes a driving mechanism, a push-pull rod and a valve cylinder mechanism, wherein the valve cylinder mechanism has a piston rod;

The piston rod, the push-pull rod and the driving shaft are linearly connected to form a connecting link, a switching assembly is connected between the piston rod and the push-pull rod and between the push-pull rod and the driving shaft, and the switching assembly is provided with spherical pairs connected along the connecting direction of the connecting link.

The application has the beneficial effects that compared with the prior art, the adapter assembly is provided with the spherical pair connected along the connecting direction of the connecting link, so that the piston rod and the push-pull rod can rotate relatively, and the push-pull rod and the driving shaft can rotate relatively. Therefore, even if the piston rod of the valve cylinder mechanism and the driving shaft of the driving mechanism are not on the same axis, the push-pull rod can rotate relative to the piston rod and the driving shaft so as to release radial bending force on the push-pull rod, and therefore the phenomenon of blocking can be avoided when the valve cylinder mechanism and the driving mechanism are driven.

Drawings

FIG. 1 is a schematic diagram of a prior art connection between a valve cylinder mechanism and a drive mechanism;

FIG. 2 is an enlarged schematic view of area A of FIG. 1;

FIG. 3 is a schematic view of the drive connection mechanism of the present application;

FIG. 4 is a schematic illustration of an assembled configuration of the push-pull rod, second adapter assembly and drive shaft of the present application;

FIG. 5 is a schematic illustration of an assembled configuration of the push-pull rod, the second adapter assembly and the drive shaft of the present application, wherein the second adapter assembly is partially cut away to expose the internal structure of the second adapter assembly;

FIG. 6 is an enlarged schematic view of region B of FIG. 5;

FIG. 7 is a schematic view of the assembled configuration of the piston rod, first adapter assembly and push-pull rod of the present application.

Reference numerals illustrate:

A valve cylinder mechanism 1, a control valve 1-1, a power cylinder 1-2, a piston rod 1-21, a push-pull rod 2, a driving mechanism 3, a driving shaft 3-1 and a connecting link S1;

The driving connection mechanism 10, the driving mechanism 100, the driving shaft 110, the mounting frame 120, the linkage assembly 130, the push-pull rod 200, the valve cylinder mechanism 300, the power cylinder 310, the piston rod 311, the control valve 320, the switching assembly 400, the first switching assembly 400a, the second switching assembly 400b, the spherical pair 401, the connection link S2, the length adjusting assembly 500, the screw 510, the adjusting nut 520, the receiving head 530 and the receiving groove 531;

the slot-shaped head 410, the avoiding slot 411, the supporting arm 412, the switching hole 413, the switching shaft 420, the clamping head 421, the pin hole 422, the matching head 430, the sleeving hole 431, the clamping block 432, the annular clamping slot 433, the first sleeving body 441, the second sleeving body 442, the first limiting spacer 451, the second limiting spacer 452, the elastic clamping ring 460, the cotter pin 470, the gasket 480, the first direction L, the second direction D1 and the third direction D2.

Detailed Description

The present application will be described in further detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present application to those skilled in the art. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the application. All other embodiments, based on the embodiments of the application, which are obtained by a person of ordinary skill in the art without making any inventive effort, are within the scope of the application.

Referring to fig. 3-7, the drive connection mechanism 10 of the present application includes a drive mechanism 100, a push-pull rod 200, and a valve cylinder mechanism 300. The valve cylinder mechanism 300 has a piston rod 311. The drive mechanism 100 has a drive shaft 110.

The piston rod 311, the push-pull rod 200 and the driving shaft 110 are linearly connected to form a connection link S2. An adapter assembly 400 is connected between the piston rod 311 and the push-pull rod 200 and between the push-pull rod 200 and the drive shaft 110. The adapter assembly 400 has a spherical pair 401 connected in the connection direction of the connection link S2.

It should be noted that the linear connection means that the piston rod 311, the push-pull rod 200, and the driving shaft 110 are sequentially connected. The connection direction between any adjacent two of the piston rod 311, the push-pull rod 200 and the driving shaft 110 may be referred to as the connection direction of the connection link S2. For example, and without limitation, the connection direction between the piston rod 311 and the push-pull rod 200 may be the direction in which the piston rod 311 is sequentially connected to the push-pull rod 200 along the connection link S2, or may be the direction in which the push-pull rod 200 is sequentially connected to the piston rod 311 along the connection link S2.

In the above manner, the adapter assembly 400 has the spherical pair 401 connected along the connection direction of the connection link S2, so that the piston rod 311 and the push-pull rod 200 can rotate relatively, and the push-pull rod 200 and the driving shaft 110 can rotate relatively. In this way, even if the piston rod 311 of the valve cylinder mechanism 300 is not on the same axis with the driving shaft 110 of the driving mechanism 100, the push-pull rod 200 can rotate relative to the piston rod 311 and the driving shaft 110 to release the radial bending force on the push-pull rod 200, so that the locking phenomenon can be avoided during the transmission between the valve cylinder mechanism 300 and the driving mechanism 100.

Alternatively, as shown in fig. 3-7, at least one connection link S2 may be formed between the valve cylinder mechanism 300 and the drive mechanism 100. As shown in fig. 3, two connection links S2 may be formed between the valve cylinder mechanism 300 and the driving mechanism 100, but is not limited thereto. In other examples, one, three, six, or other number of connection links S2 may be formed between the valve cylinder mechanism 300 and the drive mechanism 100.

Alternatively, as shown in fig. 3-7, the drive mechanism 100 includes a mounting bracket 120, a drive shaft 110, and a linkage assembly 130. The driving shaft 110 is slidably disposed on the mounting frame 120 along the axial direction of the driving shaft 110, and the linkage assembly 130 is disposed on the mounting frame 120 and is in transmission connection with the driving shaft 110.

The piston rod 311 of the valve cylinder mechanism 300 is used to extend or retract along the axial direction of the piston rod 311 to drive the push-pull rod 200, so that the push-pull rod 200 drives the driving shaft 110 to move away from or close to the valve cylinder mechanism 300 along the axial direction of the driving shaft 110. When the drive shaft 110 moves away from or toward the valve cylinder mechanism 300 in the axial direction of the drive shaft 110, the drive shaft 110 can move the linkage assembly 130.

Alternatively, as shown in fig. 3-7, the valve cylinder mechanism 300 may be integrated with a control valve 320 and a power cylinder 310, the power cylinder 310 having a piston rod 311. The power cylinder 310 includes, but is not limited to, a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder. The control valve 320 is used for controlling the power cylinder 310 to extend or retract the piston rod 311 of the power cylinder 310 to drive the push-pull rod 200, so that the push-pull rod 200 drives the driving shaft 110 to move away from or close to the power cylinder 310 along the axial direction of the driving shaft 110, and further, the driving mechanism 100 is enabled to act.

The valve cylinder mechanism 300 may be referred to in the description of the conventional valve cylinder mechanism, and will not be described here. By way of example and not limitation, the valve train 300 may be referred to in, but is not limited to, the disclosure of the valve train in the patent application publication No. CN213064123U, CN215109810U, CN207634784U or CN 219712496U.

Alternatively, as shown in FIGS. 3-7, linkage assembly 130 may be configured to convert periodic linear reciprocating movement of drive shaft 110 away from and toward valve cylinder mechanism 300 into other forms of mechanical movement for driving other mechanical components. Such other forms of mechanical movement include, but are not limited to, one or more of reciprocating oscillation, in-situ rotation, pivoting, and elevating movement. It should be noted that, the driving mechanism 100 may refer to the related descriptions of the existing driving mechanism, and will not be described herein.

Alternatively, as shown in fig. 3 to 7, the adapter assembly 400 includes a grooved head 410, an adapter shaft 420, and a fitting head 430 that are linearly connected in the connection direction of the connection link S2.

The slot-shaped head 410 is provided with an avoidance slot 411, two side walls of the avoidance slot 411 are formed into two support arms 412, the switching shaft 420 is arranged in the avoidance slot 411, and two ends of the switching shaft 420 are respectively detachably connected with the two support arms 412. The fitting head 430 is disposed in the avoiding slot 411 and provided with a socket hole 431, and the socket hole 431 is sleeved outside the adaptor shaft 420. The spherical pair 401 is formed between the adapter shaft 420 and the fitting head 430.

By the mode, the method has at least the following two beneficial effects. In the first aspect, the push-pull rod 200 is more convenient to assemble and disassemble. Specifically, when the push-pull rod 200 needs to be removed, the adapter shaft 420 is removed, so that the fitting head 430 can be pulled away from the avoiding slot 411, so that the fitting head 430 is separated from the slot-shaped head 410, and the push-pull rod 200 can be conveniently removed. When the push-pull rod 200 is required to be installed, the above steps of removing the push-pull rod 200 are performed in reverse. In the second aspect, the connection between the push-pull rod 200 and the piston rod 311 or the driving shaft 110 is more stable, and the push-pull rod is not easy to fall off. Specifically, the spherical pair 401 is formed between the adapter shaft 420 and the fitting head 430. Thus, the adapter 430 does not substantially fall off the adapter shaft 420 when the adapter shaft 420 is not removed.

Alternatively, as shown in fig. 3-7, the adapter assembly 400 includes a first socket 441 and a second socket 442. The first socket 441 is sleeved outside the adapter shaft 420, and the second socket 442 is sleeved inside the socket hole 431.

The spherical pair 401 is formed between the first socket 441 and the second socket 442. One of the first socket 441 and the second socket 442 is a concave ball socket, and the other is a convex ball socket. The sphere of the concave spherical sleeve is smaller than the sphere of the convex spherical sleeve, so that the sphere of the concave spherical sleeve can move on the sphere of the convex spherical sleeve.

The spherical pair 401 is easily worn out and needs to be replaced frequently. In this way, when the spherical pair 401 wears, the first socket 441 and the second socket 442 need to be replaced again, and the entire replacement of the adapter assembly 400 is not required, so that the maintenance cost can be reduced.

Optionally, as shown in fig. 3-7, the adapter assembly 400 includes a first spacing spacer 451 and a second spacing spacer 452. The first spacing spacer 451 and the second spacing spacer 452 are located in the avoidance slot 411 and are respectively sleeved outside the adapter shaft 420.

The first sleeve body 441 is clamped between the first spacing spacer 451 and the second spacing spacer 452, so that the first sleeve body 441 is spaced from the two support arms 412 by the first spacing spacer 451 and the second spacing spacer 452.

In this way, when the push-pull rod 200 rotates relative to the piston rod 311 and the driving shaft 110, the abrasion caused by the direct contact between the first socket 441 and the supporting arm 412 can be avoided, so that the service life of the supporting arm 412 can be prolonged, and the rotation sensitivity of the push-pull rod 200 relative to the piston rod 311 and the driving shaft 110 can be improved.

Optionally, as shown in fig. 3-7, the side wall of the socket hole 431 is provided with a catch 432 and an annular catch 433. The blocking block 432 and the annular blocking groove 433 are respectively disposed at two sides of the second socket 442 along the axial direction of the adaptor shaft 420.

The blocking block 432 is arranged on the inner side wall of the sleeve hole 431 in a protruding mode and is matched with the second sleeve body 442 in a blocking mode. The adapter assembly 400 includes an elastic collar 460, and the elastic collar 460 is clamped in the annular clamping groove 433 and is in clamping engagement with the second socket 442.

In this manner, the second socket 442 can be removed from the fitting head 430 from the side of the second socket 442 facing away from the catch 432 in the axial direction of the adapter shaft 420 when the fitting head 430 is removed from the adapter shaft 420 and the elastic collar 460 is removed from the annular catch 433. So that the convenience of the second socket 442 can be improved.

Alternatively, as shown in fig. 3 to 7, the two support arms 412 are provided with a switching hole 413, and both ends of the switching shaft 420 pass through the switching hole 413. One end of the adapter shaft 420 is provided with a chuck 421, and the chuck 421 is clamped on the outer side of the supporting arm 412. The other end of the adapter shaft 420 is provided with a pin hole 422. The adapter assembly 400 includes a cotter pin 470, wherein the cotter pin 470 is inserted into the pin hole 422 and is clamped to the outer side of the support arm 412.

In the above manner, the first socket body 441 and the second socket body 442 can be quickly and conveniently detached by the following first to fifth steps. In the first step, when the cotter 470 is pulled out of the pin hole 422, the cotter 470 is released from the pin hole 422 by the deformation, and the cotter 470 is released from the outer side of the support arm 412. The second step is to withdraw the adapter shaft 420 from the fitting head 430, so that the adapter shaft 420 is separated from the first socket body 441. The third step is to withdraw the fitting head 430 from the avoiding slot 411, so as to bring the first socket body 441 and the second socket body 442 in the socket hole 431 together out of the avoiding slot 411. The fourth step is to remove the elastic collar 460 from the annular slot 433 to release the snap fit of the elastic collar 460 to the second socket 442. The fifth step is to detach the second socket 442 from the fitting head 430 along the axial direction of the adapter shaft 420 from the side of the second socket 442 facing away from the blocking block 432, so as to drive the first socket 441 in the socket hole 431 to be detached from the fitting head 430 together.

Optionally, as shown in fig. 3-7, a spacer 480 is disposed between the cotter 470 and the outer side of the support arm 412 and between the chuck 421 and the outer side of the support arm 412, and the spacer 480 is sleeved on the adapter shaft 420.

Alternatively, as shown in fig. 3 to 7, the slot-shaped head 410 has a first direction L, a second direction D1, and a third direction D2 that are perpendicular to each other. The first direction L is an extending direction of the escape slot 411 from the end surface of the slot head 410 into the slot head 410. The second direction D1 is an axial direction of the adapter shaft 420. The escape slots 411 may penetrate both sides of the slot-shaped head 410 in the third direction D2.

In this way, the fitting head 430 may be pulled out of or put into the avoidance slot 411 from any one of both sides of the slot-shaped head 410 along the third direction D2, thus facilitating the disassembly and assembly of the fitting head 430.

Alternatively, as shown in fig. 3-7, the adapter assembly 400 between the piston rod 311 and the push-pull rod 200 is a first adapter assembly 400a, and the adapter assembly 400 between the push-pull rod 200 and the driving shaft 110 is a second adapter assembly 400b. The second direction D1 of the first adapter assembly 400a is perpendicular to the second direction D1 of the second adapter assembly 400b. So that the maximum rotatable range of the push-pull rod 200 relative to the piston rod 311 and the driving shaft 110 about the first direction L, the second direction D1 and the third direction D2 is more uniform, but is not limited thereto.

In one example, the slot-shaped head 410 of the first adapter assembly 400a is disposed at an end of the piston rod 311 near the push-pull rod 200, and the mating head 430 of the first adapter assembly 400a is disposed at an end of the push-pull rod 200 near the piston rod 311. In other alternative examples, the coupling head 430 of the first adapter assembly 400a is disposed at an end of the piston rod 311 near the push-pull rod 200, and the slotted head 410 of the first adapter assembly 400a is disposed at an end of the push-pull rod 200 near the piston rod 311.

In one example, the coupling head 430 of the second adapter assembly 400b is disposed at an end of the push-pull rod 200 near the driving shaft 110, and the slot-shaped head 410 of the second adapter assembly 400b is disposed at an end of the driving rod near the push-pull rod 200. In other alternative examples, the slotted head 410 of the second adapter assembly 400b is disposed at an end of the push-pull rod 200 near the drive shaft 110, and the mating head 430 of the second adapter assembly 400b is disposed at an end of the drive rod near the push-pull rod 200.

Alternatively, as shown in fig. 3 to 7, one of the piston rod 311, the push-pull rod 200, the driving shaft 110 and the adapter assembly 400 is the first one, and one of the piston rod 311, the push-pull rod 200, the driving shaft 110 and the adapter assembly 400 adjacent to the first one is the second one.

The driving connection mechanism 10 includes a length adjusting assembly 500, the length adjusting assembly 500 is disposed between the first and second sides, and the length adjusting assembly 500 includes a screw 510, an adjusting nut 520, and a receiving head 530 connected between the first and second sides along a connection direction of the connection link S2.

The accommodating head 530 is provided with an accommodating groove 531, and the adjusting nut 520 is rotatably disposed on the accommodating head 530 corresponding to the accommodating groove 531. The adjusting nut 520 is screwed with the screw 510. The adjusting nut 520 can rotate around the screw 510 relative to the accommodating head 530 to drive the screw 510 into or out of the accommodating groove 531.

Through the above manner, when the adjusting nut 520 drives the screw 510 to enter the accommodating groove 531, the overall length of the connecting link S2 can be reduced, and when the adjusting nut 520 drives the screw 510 to withdraw from the accommodating groove 531, the overall length of the connecting link S2 can be increased. Thus, the overall length of the connection link S2 can be adjusted, so that the valve cylinder mechanism 300 and the driving mechanism 100 which are separately installed at different intervals can be adapted, and the application range is wider.

Alternatively, in an example, the first may be the piston rod 311 and the second may be the first adapter assembly 400a, but is not limited thereto. In another example, the first may be the first adapter assembly 400a and the second may be the push-pull rod 200, but is not limited thereto. In yet another example, the first may be the push-pull rod 200 and the second may be the second adapter assembly 400b, but is not limited thereto. In yet another example, the first may be the second adapter assembly 400b and the second may be the drive shaft 110, but is not limited thereto.

It should be noted that, in an example, the screw 510 may be disposed at an end of the first member near the second member, and the receiving head 530 may be disposed at an end of the second member near the first member, but is not limited thereto. In another example, the receiving head 530 may be disposed at an end of the first body near the second body, and the screw 510 may be disposed at an end of the second body near the first body, but is not limited thereto.

The foregoing is only the embodiments of the present application, and the patent scope of the application is not limited thereto, but is also covered by the patent protection scope of the application, as long as the equivalent structures or equivalent processes of the present application and the contents of the accompanying drawings are changed, or the present application is directly or indirectly applied to other related technical fields.

Claims (10)

1. The driving connection mechanism is characterized by comprising a driving mechanism, a push-pull rod and a valve cylinder mechanism, wherein the valve cylinder mechanism is provided with a piston rod;

The piston rod, the push-pull rod and the driving shaft are linearly connected to form a connecting link, a switching assembly is connected between the piston rod and the push-pull rod and between the push-pull rod and the driving shaft, and the switching assembly is provided with spherical pairs connected along the connecting direction of the connecting link.

2. The drive connection mechanism of claim 1, wherein the adapter assembly comprises a slotted head, an adapter shaft, and a mating head that are linearly connected along a connection direction of the connection link;

The groove-shaped head is provided with an avoidance groove, two side walls of the avoidance groove are formed into two supporting arms, the switching shaft is arranged in the avoidance groove, two ends of the switching shaft are respectively detachably connected with the two supporting arms, the matching head is arranged in the avoidance groove and is provided with a sleeving hole, the sleeving hole is sleeved outside the switching shaft, and the spherical pair is formed between the switching shaft and the matching head.

3. The drive connection mechanism of claim 2, wherein the adapter assembly comprises a first socket and a second socket, the first socket is externally sleeved on the adapter shaft, and the second socket is internally sleeved in the socket hole;

The spherical pair is formed between the first sleeve joint body and the second sleeve joint body, one of the first sleeve joint body and the second sleeve joint body is a concave spherical sleeve, the other one of the first sleeve joint body and the second sleeve joint body is a convex spherical sleeve, and the spherical surface of the concave spherical sleeve is smaller than the spherical surface of the convex spherical sleeve, so that the spherical surface of the concave spherical sleeve can move on the spherical surface of the convex spherical sleeve.

4. The drive connection mechanism according to claim 3, wherein the adapter assembly comprises a first limit spacer and a second limit spacer, wherein the first limit spacer and the second limit spacer are positioned in the avoidance groove and respectively sleeved outside the adapter shaft;

The first sleeve joint body is clamped between the first limiting spacer bush and the second limiting spacer bush, and the first sleeve joint body and the two supporting arms are arranged in a spaced mode through the first limiting spacer bush and the second limiting spacer bush.

5. The drive connection mechanism according to claim 4, wherein the side wall of the socket hole is provided with a clamping block and an annular clamping groove, and the clamping block and the annular clamping groove are respectively arranged at two sides of the second socket body along the axial direction of the switching shaft;

The switching component comprises an elastic clamping ring, wherein the elastic clamping ring is clamped in the annular clamping groove and is clamped and matched with the second sleeve joint body;

When the fitting head is detached from the transfer shaft and the elastic clamping ring is detached from the annular clamping groove, the second sleeve joint body can be detached from the fitting head along the axial direction of the transfer shaft from one side, facing away from the clamping block, of the second sleeve joint body.

6. The driving connection mechanism according to claim 5, wherein two support arms are provided with a transfer hole, two ends of the transfer shaft penetrate through the transfer hole, one end of the transfer shaft is provided with a clamping head which is clamped on the outer side of the support arm, the other end of the transfer shaft is provided with a pin hole, and the transfer assembly comprises a cotter pin which penetrates through the pin hole and is clamped on the outer side of the support arm.

7. The drive connection mechanism according to claim 2, wherein the slot-shaped head has a first direction, a second direction and a third direction which are perpendicular to each other, the first direction being an extending direction of the escape slot from an end face of the slot-shaped head toward the inside of the slot-shaped head, the second direction being an axial direction of the adapter shaft, the escape slot penetrating through both sides of the slot-shaped head in the third direction.

8. The drive connection mechanism of claim 7, wherein the adapter assembly between the piston rod and the push-pull rod is a first adapter assembly and the adapter assembly between the push-pull rod and the drive shaft is a second adapter assembly, and wherein a second direction of the first adapter assembly is perpendicular to a second direction of the second adapter assembly.

9. The drive connection mechanism according to claim 1, wherein the drive mechanism comprises a mounting frame and a linkage assembly, wherein the drive shaft is slidably arranged on the mounting frame along the axial direction of the drive shaft, and the linkage assembly is arranged on the mounting frame and is in transmission connection with the drive shaft;

The piston rod of the valve cylinder mechanism is used for extending or retracting along the axial direction of the piston rod to drive the push-pull rod, so that the push-pull rod drives the driving shaft to be far away from or close to the valve cylinder mechanism along the axial direction of the driving shaft, and when the driving shaft is far away from or close to the valve cylinder mechanism along the axial direction of the driving shaft, the driving shaft can drive the linkage assembly to move.

10. The drive connection mechanism of claim 1, wherein one of the piston rod, the push-pull rod, the drive shaft, and the adapter assembly is a first one and one of the piston rod, the push-pull rod, the drive shaft, and the adapter assembly adjacent to the first one is a second one;

The driving connection mechanism comprises a length adjusting component, the length adjusting component is arranged between the first part and the second part, and the length adjusting component comprises a screw rod, an adjusting nut and a storage head, wherein the screw rod, the adjusting nut and the storage head are connected between the first part and the second part along the connection direction of the connection link;

The accommodating head is provided with an accommodating groove, the adjusting nut is rotatably arranged on the accommodating head corresponding to the accommodating groove, the adjusting nut is in threaded connection with the screw rod, and the adjusting nut can rotate around the screw rod relative to the accommodating head so as to drive the screw rod to enter or retract from the accommodating groove.