Double-sided switching clamping device and double-clamping surface clamping plate

Abstract

The present invention discloses a double-sided switchable clamping device and a double-clamping surface clamping plate, including a mounting plate, on which a left clamping arm and a right clamping arm are slidably arranged. A clamping cylinder for driving the relative movement of the two is arranged between the left clamping arm and the right clamping arm. The inner sides of the left clamping arm and the right clamping arm are rotatably provided with clamping plates through a rotating mechanism. The outer end surface of the clamping plate is concave towards its rotation center, and at least one set of first clamping blocks and second clamping blocks are arranged on the outer end surface. Both the first clamping blocks and the second clamping blocks are concave surfaces concave along their central axes and switch the clamping of cylindrical workpieces by rotation. The present invention integrates the perpendicular first clamping blocks and second clamping blocks on the clamping plate, so that the clamping plate can respectively clamp the cleaned and uncleaned rotors by rotation, and can avoid mutual contamination between different rotors, greatly reducing the equipment cost and equipment volume.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical clamping, and particularly to a double-sided switching clamping device and a double-clamping surface clamping plate. Background Art

[0002] The motor rotor generally refers to the rotating component in a motor. The motor rotor is an important part of the motor and is usually divided into two types: the motor rotor and the generator rotor. In the actual production and processing process, before pasting the permanent magnet on the motor rotor, it is usually necessary to clean the grease, dirt, etc. adhered to its surface to make it reach the required cleanliness, so as to reduce the friction between the rotor and other components after assembly, thereby extending the service life.

[0003] Currently, an automatic cleaning line for cleaning stations is mainly used to clean the motor rotor, and a truss manipulator is used for clamping and switching during loading and unloading. This makes the manipulator need to clamp both the un-cleaned motor rotor and the cleaned motor rotor. In order to avoid cross-contamination of the rotor by the clamping plate and affect the product cleanliness requirements, the same clamping plate cannot be used to grab the un-cleaned rotor and the rotor after cleaning is completed. However, if the form of a double-claw mechanism is used, the overall volume of the structure will be too large, which not only cannot adapt to the grasping of various workpiece postures, but also will occupy too much space and further increase the manufacturing cost.

[0004] Therefore, how to separately clamp the cleaned motor rotor and the un-cleaned motor rotor is an urgent problem to be solved currently. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a double-sided switching clamping device and a double-clamping surface clamping plate.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] Double-sided switching clamping device, including a mounting plate, a slide rail is provided below the mounting plate, a left clamping arm and a right clamping arm are slidably arranged on the slide rail, a clamping cylinder for driving the two to move relatively is arranged between the left clamping arm and the right clamping arm, clamping plates are rotatably arranged on the inner sides of the left clamping arm and the right clamping arm through rotating mechanisms, the outer end faces of the clamping plates are concave towards their rotation centers, and at least one set of first clamping blocks and second clamping blocks are arranged on the outer end faces, both the first clamping blocks and the second clamping blocks are concave surfaces concave along their central axes, and the central axes of the two are perpendicular to each other, and they are switched between a first state and a second state by rotation. In the first state, the first clamping blocks are arranged vertically and are used for clamping a columnar workpiece placed horizontally, the second clamping blocks are arranged horizontally and do not contact the columnar workpiece; in the second state, the clamping plate rotates 90° relative to the first state, the second clamping blocks are arranged vertically and are used for clamping a columnar workpiece placed horizontally, the first clamping blocks are arranged horizontally and do not contact the columnar workpiece.

[0008] Preferably, two sets of the first clamping blocks and two sets of the second clamping blocks are arranged on the outer end face, and the two sets of the first clamping blocks and the second clamping blocks are respectively arranged on both sides of the rotation center relatively.

[0009] Preferably, each set of the first clamping blocks and the second clamping blocks are composed of two symmetrically arranged support blocks, and the surfaces of the support blocks are flat and are fixedly arranged on the outer end face obliquely.

[0010] Preferably, there is a gap between the first clamping blocks and the second clamping blocks, and the side wall of the gap is an eight-shaped with the width expanding outwards, and the included angle range of the concave surfaces of the first clamping blocks and the second clamping blocks is 70°-150°.

[0011] Preferably, the clamping plate rotates clockwise by ° to switch from the first state to the second state, and the clamping plate rotates counterclockwise by ° to switch from the second state to the first state.

[0012] Preferably, the clamping plate is square, and a first limiting block for restricting its rotation is respectively arranged at the upper left corner and the lower right corner of the clamping plate, a blocking block matching with the first limiting block is fixedly arranged on one side surface of the clamping plate, and the blocking block abuts against any one of the first limiting blocks after rotation.

[0013] Preferably, a first buffer is arranged on the side of the first limiting block in contact with the blocking block, both sides of the blocking block are inclined surfaces, and jacks matching with the first buffer are arranged on the inclined surfaces.

[0014] Preferably, the rotation mechanism at least includes a driving cylinder, a connecting plate, a rack and a gear. The driving cylinder and the rack are arranged in parallel and are respectively fixed to the connecting plate. The driving cylinder drives the connecting plate to drive the rack to move horizontally. The gear is arranged below the rack and meshes with it. The rack drives the gear to rotate. The rotation center of the clamping plate is connected to the gear, and the two rotate synchronously.

[0015] Preferably, a limiting groove parallel to both of them is arranged between the driving cylinder and the rack. A guiding shaft moving along it is slidably arranged in the limiting groove, and the end of the guiding shaft is fixed to the connecting plate.

[0016] Preferably, the end of the driving rod of the driving cylinder is T-shaped, and the upper end of the connecting plate has an arc-shaped notch matching the end of the driving rod. The driving rod is clamped in the arc-shaped notch.

[0017] The double-clamping surface clamping plate includes a clamping plate. The outer end surface of the clamping plate is concave towards its axis, and two groups of the first clamping blocks and two groups of the second clamping blocks perpendicular to each other are arranged on the outer end surface. The two groups of the first clamping blocks and the second clamping blocks are respectively arranged on both sides of the axis relatively. Each group of the first clamping blocks and the second clamping blocks are composed of two symmetrically arranged supporting blocks. The surface of the supporting block is flat and is fixedly arranged on the outer end surface obliquely, so that the first clamping blocks and the second clamping blocks form a concave surface concave along their central axes.

[0018] The beneficial effects of the present invention are mainly reflected in:

[0019] 1. The first clamping blocks and the second clamping blocks perpendicular to each other are integrated on the clamping plate, so that the clamping plate can clamp the cleaned and uncleaned rotors respectively by rotation, and can avoid mutual contamination between different rotors. There is no need to assemble multiple clamping plates, which greatly simplifies the equipment cost and the equipment volume, and greatly improves the applicability of clamping.

[0020] 2. The concave structures of the first clamping blocks and the second clamping blocks can, on the one hand, avoid simultaneous contact with the rotor and cause contamination, and on the other hand, can improve the matching degree with the outer peripheral wall of the rotor and improve the stability of grasping the rotor.

[0021] 3. The rotation mechanism is adopted, so that the clamping plate switches the first clamping blocks and the second clamping blocks by rotation, which is convenient and fast. And the first limiting block is set to limit the position of the clamping plate, effectively ensuring that the clamping plate rotates to the specified position to realize the clamping of rotors in different states.

[0022] 4. The driving cylinder and the rack are arranged in parallel and are connected by a connecting plate, which shortens the radial distance between the driving cylinder and the rack, reduces the radial length of the rotation mechanism, and simplifies the equipment volume.

[0023] 5. Set a guide shaft to enhance the stability of the movement between the driving cylinder and the rack.

[0024] 6. Adopt a rotating structure with a gear-rack combination. Such a rotating structure has a large bearing capacity, a long service life, and high transmission accuracy in the cooperation between gear 16 and rack 15, and rotates smoothly.

[0025] 7. Slide the left clamping arm and the right clamping arm under the mounting plate, which can be moved to adjust and position the positions of the left clamping arm and the right clamping arm, so as to achieve precise positioning for clamping the rotor.

[0026] 8. First buffers are provided on both the first limit block and the slide rail to prevent hard contact between the left and right clamping arms and / or the clamping plates and the first limit block during the movement, and improve the stability of the movement / rotation of the left and right clamping arms and / or the clamping plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The technical solution of the present invention will be further described below with reference to the drawings:

[0028] Figure 1 : Schematic diagram of an embodiment of the present invention;

[0029] Figure 2 : Figure 1 Enlarged schematic diagram of part A in ;

[0030] Figure 3 : Schematic diagram of the present invention in the use state;

[0031] Figure 4 : Front view of an embodiment of the present invention;

[0032] Figure 5 : Partial structural schematic diagram of an embodiment of the present invention;

[0033] Figure 6 : Partial cross-sectional view of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The present invention will be described in detail below with reference to the specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present invention.

[0035] In the description of the solution, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. And in the description of the solution, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0036] As Figures 1 to 6 shown, the present invention discloses a double-sided switching clamping device, including a mounting plate 6. There is a slide rail 2 below the mounting plate 6. A left clamping arm 3 and a right clamping arm 4 are slidably arranged on the slide rail 2. A clamping cylinder 5 for driving the two to move relatively is arranged between the left clamping arm 3 and the right clamping arm 4. The inner sides of the left clamping arm 3 and the right clamping arm 4 are each rotatably provided with a clamping plate 1 through a rotating mechanism. The outer end face of the clamping plate 1 is concave towards its rotation center, and at least one set of first clamping blocks 7 and second clamping blocks 8 are provided on the outer end face. Both the first clamping blocks 7 and the second clamping blocks 8 are concave surfaces concave along their central axes, and the central axes of the two are perpendicular to each other, and they switch between a first state and a second state by rotation. In the first state, the first clamping blocks 7 are vertically arranged and are used for clamping a columnar workpiece placed horizontally. The second clamping blocks 8 are horizontally arranged and do not contact the columnar workpiece. In the second state, the clamping plate 1 rotates 90° relative to the first state. The second clamping blocks 8 are vertically arranged and are used for clamping a columnar workpiece placed horizontally. The first clamping blocks 7 are horizontally arranged and do not contact the columnar workpiece.

[0037] The columnar workpiece in the present invention is a motor rotor 21. In other feasible embodiments, the present invention can also be used to clamp other suitable columnar workpieces. The present invention integrates the mutually perpendicular first clamping blocks 7 and second clamping blocks 8 on the clamping plate 1. The clamping plate 1 can switch the first clamping blocks 7 and the second clamping blocks 8 by rotation. The first clamping blocks 7 and the second clamping blocks 8 are respectively used for clamping a cleaned motor rotor and an uncleaned motor rotor, so that the same clamping plate 1 can clamp two types of motor rotors respectively, and can avoid mutual contamination between different rotors, greatly simplifying the equipment cost and equipment volume.

[0038] Specifically, as Figure 1 、 Figure 2As shown in the figure, on the outer end face of the clamping plate 1 in the present invention, there are provided two groups of the first clamping blocks 7 and two groups of the second clamping blocks 8, and the two groups of the first clamping blocks 7 and the second clamping blocks 8 are respectively arranged oppositely on both sides of the rotation center. In the present preferred embodiment, the first clamping block 7 and the second clamping block 8 are isosceles right triangles, and the right-angled sides of the two are adjacent to each other to form the square clamping plate 1. Such an arrangement structure can save the area of the clamping plate 1 to the greatest extent and streamline the volume of the clamping plate 1. Of course, in other feasible embodiments, the first clamping block 7, the second clamping block 8, and the clamping plate 1 can also be other suitable shapes, such as a sector, a circle, etc.

[0039] Furthermore, each group of the first clamping blocks 7 and the second clamping blocks 8 is composed of two symmetrically arranged support blocks 9, and the surfaces of the support blocks 9 are flat and are obliquely fixed on the outer end face to form the first clamping blocks 7 and the second clamping blocks 8 that are concave along the central axis. There is a gap between the support blocks 9 in the present preferred embodiment. In this way, only one shape of the support block 9 is needed to form the first clamping block 7 and the second clamping block 8 respectively, which can reduce the manufacturing cost. Of course, in other feasible embodiments, the first clamping block 7 and the second clamping block 8 can also be directly provided with an inwardly concave support block that matches them. The inwardly concave structure of the first clamping block 7 and the second clamping block 8 can, on the one hand, prevent the first clamping block 7 and the second clamping block 8 from simultaneously contacting the cleaned / uncleaned motor rotor, resulting in contamination between the cleaned motor rotor and the uncleaned motor rotor; on the other hand, the inwardly concave first clamping block 7 and second clamping block 8 can improve the matching degree with the cylindrical outer peripheral wall of the motor rotor, support the upper and lower parts of the outer peripheral wall of the motor rotor, improve the stability of grasping the rotor, and prevent the motor rotor from slipping.

[0040] In the present invention, the included angle range of the concave surfaces of the first clamping block 7 and the second clamping block 8 is 70° - 150°, such as Figure 4 the included angle in the shown preferred embodiment is 140°.

[0041] There is a gap 10 between the first clamping block 7 and the second clamping block 8, and the side wall of the gap 10 is in an eight-shaped form with the width expanding outwards to ensure that the first clamping block 7 and the second clamping block 8 do not simultaneously contact the motor rotor.

[0042] As Figure 5 and Figure 6As shown, the rotation mechanism in the present invention at least includes a driving cylinder 13, a connecting plate 14, a rack 15 and a gear 16. The driving cylinder 13 and the rack 15 are arranged in parallel and are respectively fixed to the connecting plate 14. The driving cylinder 13 drives the connecting plate 14 to drive the rack 15 to move horizontally. The gear 16 is arranged below the rack 15 and meshes with it. The rack 15 drives the gear 16 to rotate. The rotation center of the clamping plate 1 is connected to the gear 16, and the two rotate synchronously. Such a set structure can further shorten the radial distance between the driving cylinder 13 and the rack 15, thereby shortening the radial length of the entire rotation mechanism and streamlining and reducing the volume of the left clamping arm 3 and the right clamping arm 4. The rotation mechanism adopts the cooperation mode of the rack 15 and the gear 16. Such a rotation structure has a large bearing capacity, a long service life, and high transmission precision and smooth rotation in the cooperation of the gear 16 and the rack 15. The rotation center of the clamping plate 1 is pivotally connected to the gear 16, and the installation is convenient and fast.

[0043] Further, in order to improve the stability of the driving cylinder 13 driving the rack 15 to move synchronously through the connecting plate 14, a limiting groove 1701 parallel to both of them is provided between the driving cylinder 13 and the rack 15. A guiding shaft 17 moving along it is slidably arranged in the limiting groove 1701, and the end of the guiding shaft 17 is fixed to the connecting plate 14.

[0044] In order to facilitate the installation and disassembly between the driving cylinder 13 and the connecting plate 14, the end of the driving rod 1301 of the driving cylinder 13 is T-shaped, and the upper end of the connecting plate 14 has an arc-shaped notch 1401 matching the end of the driving rod 1301. The driving rod 1301 is clamped in the arc-shaped notch 1401.

[0045] As Figure 3 shown, only the first clamping block 7 or the second clamping block 8 in the vertical direction clamps in the present invention. The clamped motor rotor is placed horizontally, and the first clamping block 7 or the second clamping block 8 in the horizontal direction does not contact the motor rotor. Therefore, each time the clamping plate 1 rotates 90° to switch the first clamping block 7 and the second clamping block 8.

[0046] In order to shorten the length of the rack 15 to the greatest extent and reduce the width of the left clamping arm 3 and the right clamping arm 4, the clamping plate 1 rotates 90° clockwise to switch from the first state to the second state, and the clamping plate 1 rotates 90° counterclockwise to switch from the second state to the first state. That is, when the rack 15 translates forward, it can drive the clamping plate 1 to rotate clockwise, and when the rack 15 translates backward, it can drive the clamping plate 1 to rotate counterclockwise.

[0047] As Figure 5As shown, a first limiting block 11 for restricting its rotation is respectively provided at the upper left corner and the lower right corner of the clamping plate 1. A stop block 12 matching the first limiting block 11 is fixedly provided on one side surface of the clamping plate 1, and after the stop block 12 rotates, it abuts against any one of the first limiting blocks 11. The setting of the first limiting block 11 can effectively limit the rotation angle of the clamping plate 1, avoid its excessive rotation, and ensure that the motor rotor is clamped by the first clamping block 7 or the second clamping block 8.

[0048] Furthermore, a first buffer 1101 is provided on the side of the first limiting block 11 in contact with the stop block 12. Both sides of the stop block 12 are inclined surfaces, and jacks 1201 matching the first buffer 1101 are provided on the inclined surfaces. When the clamping plate 1 rotates, one side of the stop block 12 contacts the first buffer 1101, and the end of the first buffer 1101 extends into the jack 1201. The setting of the first buffer 1101 avoids hard contact between the stop block 12 and the first limiting block 11 and improves the rotation stability of the clamping plate 1.

[0049] Similarly, a second limiting block 18 is provided on the slide rail 2, a second buffer 1801 is provided on the second limiting block 18, and the left clamping arm 3 and the right clamping arm 4 are slidably arranged on the slide rail 2 through a connecting block 19, and the connecting block 19 contacts the second buffer 1801 to play a buffering role.

[0050] In the present invention, the clamping cylinder 5 is fixedly provided on the left clamping arm 3, and the cylinder shaft of the clamping cylinder 5 is fixed to the right clamping arm 4 to drive the left clamping arm 3 and the right clamping arm 4 to move relatively.

[0051] In addition, in order to improve the relative movement stability of the left clamping arm 3 and the right clamping arm 4, two slide rails 2 are provided below the mounting plate 6, and the left clamping arm 3 and the right clamping arm 4 are slidably arranged on the slide rails 2. In other feasible embodiments, multiple slide rails 2 can be provided according to the widths of the left clamping arm 3 and the right clamping arm 4. And, support plates are provided between the left clamping arm 3 and the right clamping arm 4 and the mounting plate 6 to improve the strength of the left clamping arm 3 and the right clamping arm 4 and improve their stability.

[0052] For the convenience of actual use, a connecting plate 20 for installation connection is further provided above the mounting plate 6.

[0053] The working principle of the present invention is as follows:

[0054] First, the overall device is set on the upstream station (not shown in the figure) through the connecting plate 20. The left clamping arm 3 and the right clamping arm 4 move to the inlet of the cleaning machine (not shown in the figure). At this time, the clamping plate 1 is in the first state. The first clamping block 7 is vertically arranged and is used to clamp the unwashed motor rotor at the inlet. The second clamping block 8 is horizontally arranged and does not contact the unwashed motor rotor.

[0055] Then, after the cleaning is completed, the left clamping arm 3 and the right clamping arm 4 move to the outlet of the cleaning machine. The rotating mechanism drives the clamping plate 1 to rotate 90°, so that the clamping plate 1 switches to the second state. At this time, the second clamping block 8 is vertically arranged and is used to clamp the washed motor rotor. The first clamping block 7 is horizontally arranged and does not contact the washed motor rotor.

[0056] It should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0057] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention. They are not intended to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. Double-sided switchable clamping device, Characterized in that: It is used to separately clamp the cleaned motor rotor and the uncleaned motor rotor, including a mounting plate. There is a slide rail below the mounting plate. Symmetric left and right clamping arms are slidably arranged on the slide rail. A clamping cylinder for driving the two to move relatively is arranged between the left and right clamping arms. The inner sides of the left and right clamping arms are rotatably provided with clamping plates through a rotating mechanism. The outer ends of the clamping plates are concave towards their rotation centers, and at least one set of first clamping blocks and second clamping blocks are arranged on the outer end surfaces. The first clamping blocks and the second clamping blocks have the same structure, both having support surfaces symmetrically extending outward along their central axes, and the central axes of the first clamping blocks and the second clamping blocks are perpendicular to each other. The setting directions of the support surfaces are both at an angle with the plane formed by the central axes of the first clamping blocks and the second clamping blocks; The clamping device has two states. In the first state, the first clamping block is used to clamp a columnar workpiece placed horizontally, and the second clamping block does not contact the columnar workpiece; In the second state, the rotating mechanism drives the clamping plate to rotate 90° relative to the first state. The second clamping block is used to clamp a columnar workpiece placed horizontally, and the first clamping block does not contact the columnar workpiece; Two sets of the first clamping blocks and two sets of the second clamping blocks are arranged on the outer end surface. The two sets of the first clamping blocks and the second clamping blocks are respectively arranged on both sides of the rotation center; Each set of the first clamping blocks and the second clamping blocks is composed of two symmetrically arranged support blocks. The surfaces of the support blocks are flat and inclined and fixed on the outer end surface, so that the first clamping blocks and the second clamping blocks form a concave surface concave along their central axes; There is a gap between the first clamping block and the second clamping block, and the side wall of the gap is in an eight-shaped with the width expanding outward. The included angle range of the concave surfaces of the first clamping block and the second clamping block is 70°-150°; The first clamping block and the second clamping block are isosceles right triangles, and their right sides are adjacent to form a square clamping plate; The overall device is arranged on the upper process station through a connecting plate. The left and right clamping arms move to the feeding port of the cleaning machine. At this time, the clamping plate is in the first state, the first clamping block is vertically arranged and is used to clamp the uncleaned motor rotor at the feeding port, and the second clamping block is horizontally arranged and does not contact the uncleaned motor rotor; After cleaning is completed, the left and right clamping arms move to the discharging port of the cleaning machine. The rotating mechanism drives the clamping plate to rotate 90°, so that the clamping plate switches to the second state. At this time, the second clamping block is vertically arranged and is used to clamp the cleaned motor rotor, and the first clamping block is horizontally arranged and does not contact the cleaned motor rotor.

2. The double-sided switchable clamping device according to claim 1, Characterized in that: The clamping plate (1) rotates 90° clockwise to switch from the first state to the second state, and the clamping plate (1) rotates 90° counterclockwise to switch from the second state to the first state.

3. The double-sided switchable clamping device according to claim 2, It is characterized in that: The clamping plate is square, and a first limiting block for restricting its rotation is respectively arranged at the upper left corner and the lower right corner of the clamping plate. A stop block matching the first limiting block is fixedly arranged on one side surface of the clamping plate, and the stop block abuts against any one of the first limiting blocks after rotation.

4. The double-sided switchable clamping device according to claim 3, It is characterized in that: A first buffer is arranged on the side of the first limiting block in contact with the stop block. Both sides of the stop block are inclined surfaces, and jacks matching the first buffer are arranged on the inclined surfaces.

5. The double-sided switchable clamping device according to claim 1, It is characterized in that: The rotation mechanism at least includes a driving cylinder, a connecting plate, a rack and a gear. The driving cylinder and the rack are arranged in parallel and are respectively fixedly connected to the connecting plate. The driving cylinder drives the connecting plate to drive the rack to move horizontally. The gear is arranged below the rack and meshes with it. The driving rack drives the gear to rotate, and the rotation center of the clamping plate is connected to the gear, and the two rotate synchronously.

6. The double-sided switchable clamping device according to claim 5, It is characterized in that: A limiting groove parallel to both of them is arranged between the driving cylinder and the rack. A guiding shaft moving along the limiting groove is slidably arranged in the limiting groove, and the end of the guiding shaft is fixedly connected to the connecting plate.

7. The double-sided switchable clamping device according to claim 6, It is characterized in that: The end of the driving rod of the driving cylinder is T-shaped, and an arc-shaped notch matching the end of the driving rod is arranged at the upper end of the connecting plate. The driving rod is clamped in the arc-shaped notch.

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