Tool clamp for hydraulic valve body machining

Abstract

The utility model belongs to the technical field of hydraulic valve body machining, and discloses a hydraulic valve body machining tool clamp which comprises a bottom plate, a rotating assembly, a base plate and a rotating frame, two sliding plates are arranged on the rotating frame in a sliding mode, a driving assembly is arranged on the rotating frame, sliding rods are arranged on the sliding plates in a sliding mode, and first clamping plates are arranged at the ends of the two sliding rods. The sliding rods are sleeved with compression springs, two second clamping plates are slidably arranged on the sliding plate, clamping columns are arranged on the sides, close to the sliding plate, of the tops of the second clamping plates, two inclined plates are symmetrically arranged on the top of the first clamping plate, strip-shaped holes are formed in the inclined plates, the length direction of the strip-shaped holes is consistent with that of the inclined plates, and the clamping columns are in sliding fit with the strip-shaped holes. The driving assembly drives the two sliding plates to synchronously slide towards the middle of the rotating frame, after the first clamping plate makes contact with the hydraulic valve body, the driving assembly continues to drive the sliding plates to slide, the clamping columns slide in the strip-shaped holes, the second clamping plates are driven to move towards the first clamping plate, the four second clamping plates are clamped to the two sides of the hydraulic valve body, and it is guaranteed that the hydraulic valve body is stably clamped.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valve body processing technology, and in particular to a tooling fixture for hydraulic valve body processing. Background Technology

[0002] Hydraulic valves for construction machinery are components that control the flow, direction, and pressure of hydraulic oil output by an engine-driven hydraulic pump through various valve structures. Existing hydraulic valves require various machining processes during manufacturing, such as drilling positioning holes in the valve body. A fixture is a device used in mechanical manufacturing to fix the workpiece in the correct position for machining or inspection. Fixtures are required in all machining processes of the hydraulic valve body. When machining the reference surface of the hydraulic valve body, it is necessary to position the hydraulic valve body.

[0003] Chinese utility model patent CN220740209U discloses a hydraulic valve block clamping fixture, including a bottom support, a first vertical rod support, a second vertical rod support, a flipping plate, and clamping components. Four identical sets of clamping components are symmetrically distributed about the center line of the flipping plate. Each set of clamping components forms a clamping fixture in pairs. Each clamping component includes a dual-axis cylinder, which is fixedly installed at the top of the flipping plate. A telescopic rod is fixedly installed at the movable end of the dual-axis cylinder. A movable plate is fixedly installed on the outer side of the telescopic rod. A fixed clamping plate is fixedly installed on the outer side of the movable plate. A sliding groove is formed on the outer side of the movable plate, and the movable clamping plate is slidably installed on the outer side of the movable plate. An outer slider and an inner slider are fixedly installed on the back of the movable clamping plate. A second drive motor is fixedly installed on the outer side of the movable plate. A transmission screw is fixedly installed on the output shaft of the second drive motor, passing through the inner slider, and the transmission screw and the inner slider are threaded together. To clamp a workpiece, two dual-axis cylinders are needed to drive two movable plates closer together. Then, two drive motors drive the transmission screw to rotate, causing the two movable clamping plates to move and clamp the workpiece.

[0004] Regarding the aforementioned technologies, the inventors believe that the following drawbacks exist: During the use of the device, two dual-axis cylinders and two drive motors are required to clamp a single workpiece. This design results in a large number of power units being used, leading to relatively high overall production costs and poor stability. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a tooling fixture for machining hydraulic valve bodies.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a tooling fixture for machining a hydraulic valve body, comprising a base plate, on which two vertically arranged base plates are spaced apart, and a rotating frame is horizontally rotatably arranged between the two base plates. A rotating component for driving the rotating frame to rotate is provided on one of the base plates. Two sliding plates are slidably arranged on the rotating frame, and a driving component for driving the two sliding plates to slide synchronously toward the center of the rotating frame is provided on the rotating frame. A sliding rod is slidably arranged on the sliding plate, and a first clamping plate is provided at each adjacent end of the two sliding rods. A compression spring is sleeved on the rod body of the sliding rod located between the first clamping plate and the sliding plate. Two second clamping plates are slidably arranged on the sliding plate along the length direction of the sliding plate. A locking post is provided on the top of the second clamping plate near the side of the sliding plate. Two inclined plates are symmetrically arranged on the top of the first clamping plates. A strip-shaped hole is opened on the inclined plate, and the length direction of the strip-shaped hole is consistent with the length direction of the inclined plate. The locking post is slidably engaged with the strip-shaped hole.

[0007] By adopting the above technical solution, a base plate, a rotating frame, a rotating assembly, a driving assembly, a sliding rod, and a first clamping plate are set up. The hydraulic valve body is placed between two first clamping plates. The driving assembly drives the two sliding plates to slide synchronously towards the center of the rotating frame. When the two first clamping plates contact the hydraulic valve body, the first clamping plates are blocked and stop moving. The driving assembly continues to drive the sliding plates to slide. At this time, the locking pin slides in the slotted hole, driving the second clamping plate to move towards the first clamping plate. The four second clamping plates clamp the hydraulic valve body on both sides, ensuring that the hydraulic valve body is stably clamped. During the processing, the rotating frame is driven to rotate by the rotating assembly to adjust the angle of the hydraulic valve body for easy processing. The clamping action can be completed by only one driving assembly, which reduces production costs while maintaining high stability.

[0008] Furthermore, the drive assembly includes fixed blocks spaced apart on the rotating frame, with a bidirectional threaded rod rotatably mounted on both fixed blocks. A connecting frame is mounted on each of the two sliding plates on opposite sides. A control post is mounted on the side of the connecting frame away from the sliding plate, and a connecting block is mounted on the side of the control post away from the connecting frame. The two connecting blocks are respectively helically connected to both ends of the bidirectional threaded rod via threaded holes. A driven wheel is fixedly sleeved on the bidirectional threaded rod. A drive motor is mounted on the rotating frame, and a driving wheel is mounted on the output shaft of the drive motor. The driving wheel meshes with the driven wheel.

[0009] By adopting the above technical solution, a fixed block, a bidirectional threaded rod, a connecting frame, a control column, and a drive motor are set up. The drive motor drives the driving wheel to rotate. Since the driving wheel meshes with the driven wheel, the rotation of the driven wheel drives the bidirectional threaded rod to rotate. Since the two connecting blocks are respectively connected to the two ends of the bidirectional threaded rod through threaded holes, the rotation of the bidirectional threaded rod can drive the two connecting blocks to move synchronously towards the center of the rotating frame or synchronously away from the center of the rotating frame. The movement of the connecting blocks drives the control column, the connecting frame, and the sliding plate to move.

[0010] Furthermore, the rotating frame is provided with grooves at intervals, the openings of two grooves are opposite each other, and sliding blocks are provided on both sides of the slide plate, the sliding blocks being slidably disposed in the corresponding grooves.

[0011] By adopting the above technical solution, and setting up chutes and sliding blocks, the stability of the skateboard sliding is ensured.

[0012] Furthermore, the skateboard is provided with two slide rails spaced apart, the length direction of the slide rails is consistent with the length direction of the skateboard, and the second clamping plate is slidably connected to the corresponding slide rail through a slider.

[0013] By adopting the above technical solution and setting up slide rails and sliders, the stability of the second clamping plate sliding is ensured.

[0014] Furthermore, the rotating frame is provided with two mounting seats at intervals, and the mounting seats are provided with sliding holes, and the control column is slidably connected to the sliding holes.

[0015] By adopting the above technical solution, mounting bases and sliding holes are set to restrict the control column and ensure its stability.

[0016] Furthermore, the slide plate has a through hole, the sliding rod is slidably connected to the through hole, and a baffle is provided on the side of the sliding rod away from the first clamping plate.

[0017] By adopting the above technical solution, a through hole and a baffle are set. The baffle limits the sliding rod and prevents the compression spring from being too strong and pushing the sliding rod out of the through hole.

[0018] Furthermore, the distance from the side of the inclined plate connected to the first clamping plate to the sliding rod is less than the distance from the other side of the inclined plate to the sliding rod.

[0019] Furthermore, trunnions are provided on both sides of the rotating frame, and the trunnions are rotatably connected to the corresponding base plate.

[0020] By adopting the above technical solution, trunnions are provided on both sides of the rotating frame to ensure the stability of the rotating frame's rotation.

[0021] Furthermore, the rotating assembly includes a connecting seat disposed on the substrate, on which a rotary motor is horizontally disposed, and the output shaft of the rotary motor is connected to an adjacent trunnion.

[0022] By adopting the above technical solution, a connecting seat and a rotary motor are set up. The rotary motor drives the trunnion to rotate, so that the rotating frame rotates.

[0023] Furthermore, the connecting frame includes a connecting plate connected to the control column, and a connecting column is provided on the side of the connecting plate away from the control column. There are four connecting columns, which are arranged in a rectangular array. The end of each connecting column away from the connecting plate is connected to the sliding plate.

[0024] By adopting the above technical solution, a connecting plate and a connecting column are set up. The connecting column connects the connecting plate and the sliding plate, so that there is a certain gap between the connecting plate and the sliding plate, providing space for the sliding rod to slide.

[0025] In summary, this utility model has the following beneficial effects:

[0026] 1. In this application, a base plate, a rotating frame, a rotating assembly, a driving assembly, a sliding rod, and a first clamping plate are provided. The hydraulic valve body is placed between two first clamping plates. The driving assembly drives the two sliding plates to slide synchronously toward the center of the rotating frame. When the two first clamping plates contact the hydraulic valve body, the first clamping plates are blocked and stop moving. The driving assembly continues to drive the sliding plates to slide. At this time, the locking pin slides in the slotted hole, driving the second clamping plate to move toward the first clamping plate. The four second clamping plates clamp the hydraulic valve body on both sides, ensuring that the hydraulic valve body is stably clamped. During the processing, the rotating frame is driven to rotate by the rotating assembly to adjust the angle of the hydraulic valve body, which facilitates processing. The clamping action can be completed by only one driving assembly, which reduces production costs while maintaining high stability.

[0027] 2. In this application, a fixed block, a bidirectional threaded rod, a connecting frame, a control column, and a drive motor are provided. The drive motor drives the driving wheel to rotate. Since the driving wheel meshes with the driven wheel, the rotation of the driven wheel drives the bidirectional threaded rod to rotate. Since the two connecting blocks are respectively connected to the two ends of the bidirectional threaded rod through threaded holes, the rotation of the bidirectional threaded rod can drive the two connecting blocks to move synchronously towards the center of the rotating frame or synchronously away from the center of the rotating frame. The movement of the connecting blocks drives the control column, the connecting frame, and the sliding plate to move. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the rotating frame according to an embodiment of the present invention;

[0030] Figure 3 This is a structural schematic diagram of the rotating frame from another angle according to an embodiment of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the skateboard, the first clamping plate, and the second clamping plate in an embodiment of this utility model.

[0032] In the diagram: 10. Base plate; 11. Base plate; 20. Rotating frame; 21. Slide groove; 22. Sliding block; 23. Mounting seat; 24. Trunnion; 30. Rotating assembly; 31. Connecting seat; 32. Rotary motor; 40. Slide plate; 41. Sliding rod; 42. First clamping plate; 43. Compression spring; 44. Second clamping plate; 45. Locking post; 46. Inclined plate; 47. Strip hole; 48. Slide rail; 49. Baffle; 50. Drive assembly; 51. Fixing block; 52. Bidirectional threaded rod; 53. Connecting frame; 531. Connecting plate; 532. Connecting column; 54. Control column; 55. Connecting block; 56. Driven wheel; 57. Drive motor; 58. Driving wheel. Detailed Implementation

[0033] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] like Figure 1-4 As shown in the illustration, this application discloses a tooling fixture for machining a hydraulic valve body, including a base plate 10, a base plate 11, a rotating frame 20, a rotating assembly 30, a driving assembly 50, a sliding rod 41, and a first clamping plate 42. There are two base plates 11, horizontally spaced apart and vertically arranged on the base plate 10. The rotating frame 20 is horizontally rotatably positioned between the two base plates 11. The rotating assembly 30 is mounted on one of the base plates 11 and drives the rotating frame 20 to rotate. Two sliding plates 40 are slidably mounted on the rotating frame 20, with the sliding direction of the sliding plates 40 aligned with the length direction of the rotating frame 20. The driving assembly 50 is mounted on the rotating frame 20 and drives the two sliding plates 40 to slide synchronously towards the center of the rotating frame 20. A sliding rod 41 is slidably mounted on the sliding plate 40, perpendicular to the surface of the sliding plate 40. A first clamping plate 42 is mounted at each adjacent end of the two sliding rods 41, and the first clamping plate 42 is parallel to the sliding plate 40. The hydraulic valve body is placed between the two first clamping plates 42, and the two sliding plates 40 are driven synchronously to slide towards the middle of the rotating frame 20 by the drive assembly 50.

[0035] Two second clamping plates 44 are slidably disposed on the skateboard 40 along the length of the skateboard 40. The two second clamping plates 44 are located on both sides of the first clamping plate 42, and the surface of the second clamping plates 44 is perpendicular to the surface of the skateboard 40. A locking post 45 is provided on the top of the second clamping plate 44 near the side of the slide plate 40. Two inclined plates 46 are symmetrically arranged on the top of the first clamping plate 42. The inclined plates 46 have strip holes 47, the length of which is consistent with the length of the inclined plates 46. The locking post 45 slides into the strip holes 47. The slide plate 40 slides, causing the first clamping plate 42 to move. When the two first clamping plates 42 come into contact with the hydraulic valve body, the first clamping plates 42 are blocked and stop moving. The drive component 50 continues to drive the slide plate 40 to slide. At this time, the slide plate 40 moves closer to the first clamping plate 42. The locking post 45 slides in the strip holes 47, causing the second clamping plate 44 to move towards the first clamping plate 42. The four second clamping plates 44 clamp the hydraulic valve body on both sides, ensuring that the hydraulic valve body is stably clamped. During the processing, the rotating component 30 drives the rotating frame 20 to rotate to adjust the angle of the hydraulic valve body, which facilitates processing. The clamping action can be completed by only one drive component 50, which reduces production costs and has high stability. A compression spring 43 is fitted on the sliding rod 41 located between the first clamping plate 42 and the slide plate 40. One end of the compression spring 43 is connected to the slide plate 40 and the other end is connected to the first clamping plate 42. When the slide plate 40 moves closer to the first clamping plate 42, the compression spring 43 is compressed. After the hydraulic valve body is processed, the drive assembly 50 drives the slide plate 40 to reset. Under the action of the elastic force, the compression spring 43 pushes the sliding rod 41 and the first clamping plate 42 to reset. The locking pin 45 slides in the strip hole 47, driving the second clamping plate 44 to reset.

[0036] Specifically, the rotating frame 20 is provided with grooves 21 spaced apart, the length direction of the grooves 21 is consistent with the length direction of the rotating frame 20, and the openings of the two grooves 21 are opposite each other. Sliding blocks 22 are provided on both sides of the slide plate 40, and the sliding blocks 22 are slidably disposed within the corresponding grooves 21 to ensure the stability of the slide plate 40. Two slide rails 48 are provided on the slide plate 40 spaced apart, the length direction of the slide rails 48 is consistent with the length direction of the slide plate 40. The second clamping plate 44 is slidably connected to the corresponding slide rail 48 via a slider to ensure the stability of the second clamping plate 44. A through hole is provided on the slide plate 40, and the sliding rod 41 is slidably connected to the through hole. A baffle 49 is provided on the side of the sliding rod 41 away from the first clamping plate 42, which limits the sliding rod 41 to prevent the compression spring 43 from having excessive force and pushing the sliding rod 41 out of the through hole. The distance from the side of the inclined plate 46 connected to the first clamping plate 42 to the sliding rod 41 is less than the distance from the other side of the inclined plate 46 to the sliding rod 41.

[0037] In configuration, the drive assembly 50 includes fixed blocks 51 spaced apart on the rotating frame 20. A bidirectional threaded rod 52 is rotatably mounted on both fixed blocks 51, with the length of the bidirectional threaded rod 52 aligned with the length of the rotating frame 20. Connecting frames 53 are provided on opposite sides of the two sliding plates 40. A control post 54 is located on the side of the connecting frame 53 away from the sliding plate 40, and a connecting block 55 is located on the side of the control post 54 away from the connecting frame 53. The two connecting blocks 55 are screwed to both ends of the bidirectional threaded rod 52 via threaded holes, allowing the rotation of the bidirectional threaded rod 52 to drive the two connecting blocks 55 to move synchronously towards the center of the rotating frame 20 or synchronously away from the center of the rotating frame 20. The movement of the connecting blocks 55 causes the control post 54, connecting frame 53, and sliding plate 40 to move. A driven wheel 56 is fixedly sleeved on the bidirectional threaded rod 52. A drive motor 57 is mounted on the rotating frame 20. A driving wheel 58 is mounted on the output shaft of the drive motor 57. The driving wheel 58 meshes with the driven wheel 56. The drive motor 57 drives the driving wheel 58 to rotate, causing the driven wheel 56 to rotate and thus rotating the bidirectional threaded rod 52. Two mounting seats 23 are spaced apart on the rotating frame 20. Each mounting seat 23 has a sliding hole. The control post 54 is slidably connected to the sliding hole, which restricts the control post 54 and ensures its stability.

[0038] The connecting frame 53 includes a connecting plate 531 connected to the control column 54. There are four connecting columns 532 on the side of the connecting plate 531 away from the control column 54. The four connecting columns 532 are arranged in a rectangular array. The end of the connecting column 532 away from the connecting plate 531 is connected to the slide plate 40. The connecting column 532 connects the connecting plate 531 and the slide plate 40, so that there is a certain gap between the connecting plate 531 and the slide plate 40, providing space for the sliding rod 41 to slide.

[0039] In a specific configuration, trunnions 24 are provided on both sides of the rotating frame 20. The trunnions 24 are rotatably connected to the corresponding base plate 11 to ensure the stability of the rotation of the rotating frame 20. The rotating assembly 30 includes a connecting seat 31 provided on the base plate 11. A rotary motor 32 is horizontally provided on the connecting seat 31. The output shaft of the rotary motor 32 is connected to the adjacent trunnion 24. The rotary motor 32 drives the trunnion 24 to rotate, thereby causing the rotating frame 20 to rotate.

[0040] The working principle of the tooling fixture for machining a hydraulic valve body in this embodiment is as follows: The hydraulic valve body is placed between two first clamping plates 42. Then, the drive motor 57 is started to drive the driving wheel 58 to rotate, causing the driven wheel 56 to rotate and drive the bidirectional threaded rod 52 to rotate. This causes the two connecting blocks 55 to move synchronously towards the center of the rotating frame 20, driving the control column 54, connecting frame 53, and sliding plate 40 to move. When the two first clamping plates 42 come into contact with the hydraulic valve body, the first clamping plates 42 are blocked and stop moving. The drive motor 57 continues to drive the sliding plate 40 to slide. At this time, the sliding plate 40 moves closer to the first clamping plates 42, and the locking column 45 slides in the slotted hole 47, driving the second clamping plate 44 to move towards the first clamping plate 42. The four second clamping plates 44 clamp the hydraulic valve body on both sides, ensuring that the hydraulic valve body is stably clamped. During the machining process, the rotary motor 32 is started to drive the trunnion 24 and the rotating frame 20 to rotate, so as to adjust the angle of the hydraulic valve body for easy machining. When the slide plate 40 approaches the first clamping plate 42, the compression spring 43 is compressed. After processing, the drive motor 57 drives the bidirectional threaded rod 52 to rotate in the opposite direction, so that the slide plate 40 is reset. Under the action of elastic force, the compression spring 43 pushes the sliding rod 41 and the first clamping plate 42 to reset. The locking pin 45 slides in the strip hole 47, driving the second clamping plate 44 to reset.

[0041] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A tooling fixture for machining a hydraulic valve body, characterized in that: Includes a base plate (10), on which two vertically arranged base plates (11) are spaced apart. A rotating frame (20) is horizontally rotatably arranged between the two base plates (11). A rotating component (30) for driving the rotating frame (20) to rotate is provided on one of the base plates (11). Two sliding plates (40) are slidably arranged on the rotating frame (20). A driving component (50) for driving the two sliding plates (40) to slide synchronously toward the center of the rotating frame (20) is provided on the rotating frame (20). Sliding rods (41) are slidably arranged on the sliding plates (40). Each adjacent end of the two sliding rods (41) is provided with a... The first clamping plate (42) has a compression spring (43) sleeved on the rod body of the sliding rod (41) located between the first clamping plate (42) and the sliding plate (40). Two second clamping plates (44) are slidably arranged on the sliding plate (40) along the length direction of the sliding plate (40). A locking post (45) is provided on the top of the second clamping plate (44) near the side of the sliding plate (40). Two inclined plates (46) are symmetrically arranged on the top of the first clamping plate (42). A strip hole (47) is opened on the inclined plate (46). The length direction of the strip hole (47) is consistent with the length direction of the inclined plate (46). The locking post (45) is slidably engaged with the strip hole (47).

2. The tooling fixture for machining a hydraulic valve body according to claim 1, characterized in that: The drive assembly (50) includes fixed blocks (51) spaced apart on the rotating frame (20). A bidirectional threaded rod (52) is rotatably mounted on both fixed blocks (51). A connecting frame (53) is provided on each of the two sliding plates (40) on opposite sides. A control column (54) is provided on the side of the connecting frame (53) away from the sliding plate (40). A connecting block (55) is provided on the side of the control column (54) away from the connecting frame (53). The two connecting blocks (55) are respectively screwed to both ends of the bidirectional threaded rod (52) through threaded holes. A driven wheel (56) is fixedly sleeved on the bidirectional threaded rod (52). A drive motor (57) is provided on the rotating frame (20). A drive wheel (58) is provided on the output shaft of the drive motor (57). The drive wheel (58) meshes with the driven wheel (56).

3. The tooling fixture for machining a hydraulic valve body according to claim 1, characterized in that: The rotating frame (20) is provided with grooves (21) spaced apart, with the openings of the two grooves (21) facing each other. Sliding blocks (22) are provided on both sides of the sliding plate (40), and the sliding blocks (22) are slidably disposed in the corresponding grooves (21).

4. The tooling fixture for machining a hydraulic valve body according to claim 1, characterized in that: The slide plate (40) is provided with two slide rails (48) spaced apart. The length direction of the slide rails (48) is consistent with the length direction of the slide plate (40). The second clamping plate (44) is slidably connected to the corresponding slide rail (48) through a slider.

5. A tooling fixture for machining a hydraulic valve body according to claim 2, characterized in that: The rotating frame (20) is provided with two mounting seats (23) spaced apart. The mounting seats (23) are provided with sliding holes, and the control column (54) is slidably connected to the sliding holes.

6. A tooling fixture for machining a hydraulic valve body according to claim 1, characterized in that: The slide plate (40) has a through hole, the sliding rod (41) is slidably connected to the through hole, and a baffle (49) is provided on the side of the sliding rod (41) away from the first clamping plate (42).

7. A tooling fixture for machining a hydraulic valve body according to claim 1, characterized in that: The distance from the side of the inclined plate (46) connected to the first clamping plate (42) to the sliding rod (41) is less than the distance from the other side of the inclined plate (46) to the sliding rod (41).

8. A tooling fixture for machining a hydraulic valve body according to claim 1, characterized in that: The rotating frame (20) is provided with trunnions (24) on both sides, and the trunnions (24) are rotatably connected to the corresponding base plate (11).

9. A tooling fixture for machining a hydraulic valve body according to claim 8, characterized in that: The rotating assembly (30) includes a connecting seat (31) disposed on a base plate (11), and a rotary motor (32) is horizontally disposed on the connecting seat (31). The output shaft of the rotary motor (32) is connected to an adjacent trunnion (24).

10. A tooling fixture for machining a hydraulic valve body according to claim 2, characterized in that: The connecting frame (53) includes a connecting plate (531) connected to the control column (54). A connecting column (532) is provided on the side of the connecting plate (531) away from the control column (54). There are four connecting columns (532), which are arranged in a rectangular array. The end of each connecting column (532) away from the connecting plate (531) is connected to the slide plate (40).

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