Numerical control bending machine special for steel plate

Abstract

The utility model discloses a special numerical control bending machine for a steel plate, which belongs to the technical field of steel plate processing equipment and comprises a supporting seat frame, a worktable, a bending driving mechanism, a jacking action mechanism, a self-locking limiting mechanism and a numerical control module, a workbench is arranged on the supporting seat frame, and a bending driving mechanism is arranged in the supporting seat frame and movably connected with the workbench. The jacking action mechanism is arranged on the side face of the supporting seat frame and movably arranged on the workbench. The self-locking limiting mechanism is arranged on the other side face of the supporting seat frame relative to the jacking action mechanism. And the numerical control module is arranged on the supporting seat frame and is in control connection with the bending driving mechanism, the jacking action mechanism and the self-locking limiting mechanism. The numerical control bending machine special for the steel plate solves the technical problem of how to enable the steel plate to be self-locked and limited when the steel plate is bent.

Description

Technical Field

[0001] The utility model relates to the technical field of steel plate processing equipment, in particular to a special numerical control bending machine for steel plates. Background Art

[0002] Steel plate is a flat sheet of steel formed by pouring molten steel and pressing it after cooling. It has flat and rectangular shapes and can be directly rolled or cut from wide steel strips. Due to its excellent performance and wide range of applications, steel plate plays an important role in many fields, including construction, machinery, automobiles, ships, chemicals, petroleum, and healthcare. For example, in the construction field, steel plate can be used to manufacture the load-bearing components and enclosures of steel structures; in the machinery field, steel plate is the basic material for the manufacture of various mechanical parts and components; and in the automotive field, steel plate is widely used in the manufacture of components such as car bodies and chassis.

[0003] Steel plate bending is the process of mechanically bending steel plates to form specific shapes and angles. The principle behind steel plate bending is to apply external pressure to the steel plate, causing it to bend through elastic and plastic deformation. By adjusting parameters such as the press brake's die shape, bending force, and bending speed, the bending angle and shape of the steel plate can be precisely controlled.

[0004] Based on this, Chinese patent CN211386397U discloses a steel plate bending machine, which includes a door-shaped frame, a horizontal workbench fixed on the frame, and a limit mechanism provided on one side of the frame at the workbench, and an automatic discharging mechanism provided on both sides of the frame at the workbench and one end close to the limit mechanism; the automatic discharging mechanism includes a support frame vertically slidingly connected to both sides of the workbench, the support frame is horizontally arranged, and a push plate is slidably connected to the support frame, the push plate is tightly pressed against the end of the workbench and the top is flush with the workbench, hydraulic cylinders are provided on both sides of the bottom of the support frame, the cylinder body of the hydraulic cylinder is fixed on the side wall of the workbench, the piston rod end of the hydraulic cylinder is fixedly connected to the top of the support frame, and the support frame is connected to a drive assembly for driving the push plate to slide along the top of the support frame. This steel plate bending machine has the effect of replacing the traditional staff manually taking out the steel plates, saving time and effort for the staff.

[0005] However, the steel plate bending machine disclosed above still has the technical problem that it cannot effectively fix the steel plate during bending. Specifically, the steel plate bending machine disclosed above is connected to a screw by rotating the side wall of its workbench, and a limit plate is threadedly connected to the screw. A guide rod is fixed on the workbench and arranged parallel to the axial direction of the screw in the length direction. The limit plate is slidably connected to the guide rod, and the screw is rotated to drive the limit plate to slide horizontally along the axial direction of the screw, so that the distance from the limit plate to the workbench can be adjusted, and the steel plate can be bent at different positions. However, this type of adjustable limit plate cannot limit the front, back and upper part of the steel plate. Generally speaking, when bending a steel plate, in addition to the area to be bent and pressed, the positioning area and the workbench area need to limit at least three degrees of freedom of the steel plate to avoid displacement during the bending action, thereby affecting the processing accuracy of the bending process. Utility Model Content

[0006] Based on this, it is necessary to provide a special CNC bending machine for steel plates to solve the technical problem of how to make the steel plates self-locking and limited when being bent.

[0007] A special CNC bending machine for steel plates, comprising: a supporting frame, a workbench, a bending drive mechanism, a pressing action mechanism, a self-locking limit mechanism and a CNC module; the workbench is arranged on the supporting frame, the bending drive mechanism is arranged in the supporting frame, and the bending drive mechanism is movably connected to the workbench; the pressing action mechanism is arranged on the side of the supporting frame, and the pressing action mechanism is movably arranged on the workbench; the self-locking limit mechanism is arranged on the other side of the supporting frame relative to the pressing action mechanism; the CNC module is arranged on the supporting frame, and the CNC module is respectively controlled and connected with the bending drive mechanism, the pressing action mechanism and the self-locking limit mechanism.

[0008] Furthermore, the supporting frame comprises a frame, a plurality of brackets and a plurality of guide wheel structures.

[0009] Furthermore, the workbench is provided on the top of the seat frame, and a plurality of brackets are evenly distributed on the side of the seat frame, and the top of each bracket is movably connected to a guide wheel structure.

[0010] Furthermore, the bending drive mechanism includes a bending seat frame, a bending drive cylinder, a bending telescopic rod, a bending connection part, a bending action plate, an action plate traction link and a traction connection part.

[0011] Furthermore, the bending seat frame is fixedly connected to the seat frame, and the lower part of the bending drive cylinder is connected to the bending seat frame; the bending drive cylinder is drivingly connected to the bending telescopic rod, and one end of the bending telescopic rod is movably connected to the bending connection part; the bending connection part is connected to the bending action plate; the two action plate traction links are relatively arranged at the two end sides of the bending action plate, and each action plate traction link is movably connected to one traction connection part; the two traction connections are relatively arranged on both sides of the top of the seat frame.

[0012] Furthermore, the pressing action mechanism comprises a pressing support, a pressing driving cylinder, a pressing telescopic rod, a pressing lifting connecting rod, a lifting guide rail frame, a pressing action frame and a pressing part.

[0013] Furthermore, the top pressure support is connected to the side of the seat frame, the top pressure drive cylinder is arranged in the top pressure support, and the top pressure drive cylinder is drivably connected to the top pressure telescopic rod; the upper part of the top pressure telescopic rod is connected to the top pressure lifting connecting rod, the top pressure lifting connecting rod is movably arranged in the lifting guide rail frame, and the top pressure lifting connecting rod is connected to the top pressure action frame.

[0014] Furthermore, the end side of the pressing action frame is movably connected to the side surface of the lifting guide rail frame, the pressing part is provided at the lower part of the pressing action frame, and the pressing part is movably provided on the workbench.

[0015] Furthermore, the self-locking limiting mechanism comprises a self-locking seat frame, a self-locking drive cylinder, a self-locking telescopic rod, a limiting connecting rod locking claw and a locking claw connecting portion.

[0016] Furthermore, the self-locking seat frame is fixedly arranged on the side surface of the supporting seat frame, the bottom of the self-locking drive cylinder body is movably connected to the self-locking seat frame, and the self-locking drive cylinder body is driven and connected to the self-locking telescopic rod; the top of the self-locking telescopic rod is movably connected to the side surface of the limiting link locking claw, and the lower part of the limiting link locking claw is movably connected to the locking claw connecting part, and the locking claw connecting part is connected to the top side surface of the supporting seat frame.

[0017] In summary, the utility model special CNC bending machine for steel plates is respectively provided with a supporting seat frame, a workbench, a bending drive mechanism, a top pressing mechanism, a self-locking limit mechanism and a CNC module; the workbench is arranged on the supporting seat frame, the bending drive mechanism is arranged in the supporting seat frame, and the bending drive mechanism is movably connected to the workbench; the top pressing mechanism is arranged on the side of the supporting seat frame, and the top pressing mechanism is movably arranged on the workbench; the self-locking limit mechanism is arranged on the other side of the supporting seat frame relative to the top pressing mechanism; the CNC module is arranged on the supporting seat frame, and the CNC module is respectively controlled and connected with the bending drive mechanism, the top pressing mechanism and the self-locking limit mechanism. The utility model special CNC bending machine for steel plates can fully limit the steel plate when the steel plate is bent, so as to avoid the problem that the steel plate shifts during bending and affects the bending accuracy; therefore, the utility model special CNC bending machine for steel plates solves the technical problem of how to make the steel plate self-locking and limited when being bent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a CNC bending machine for steel plates of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model's special CNC bending machine for steel plates from another direction;

[0020] Figure 3 This is a schematic diagram of the structure of the utility model's special CNC bending machine for steel plates from another direction;

[0021] Figure 4 This is a schematic diagram of the exploded structure of the other direction of the structure of the special CNC bending machine for steel plates of the utility model. DETAILED DESCRIPTION

[0022] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0025] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0028] Please also refer to Figures 1 to 4 The utility model is a special CNC bending machine for steel plates, comprising: a supporting frame 1, a workbench 2, a bending drive mechanism 3, a top pressing mechanism 4, a self-locking limit mechanism 5 and a CNC module 6; the workbench 2 is arranged on the supporting frame 1, the bending drive mechanism 3 is arranged in the supporting frame 1, and the bending drive mechanism 3 is movably connected to the workbench 2; the top pressing mechanism 4 is arranged on the side of the supporting frame 1, and the top pressing mechanism 4 is movably arranged on the workbench 2; the self-locking limit mechanism 5 is arranged on the other side of the supporting frame 1 relative to the top pressing mechanism 4; the CNC module 6 is arranged on the supporting frame 1, and the CNC module 6 is respectively controlled and connected with the bending drive mechanism 3, the top pressing mechanism 4 and the self-locking limit mechanism 5.

[0029] Specifically, when the CNC bending machine for steel plates of the present invention is in operation, an external steel plate to be bent is transferred onto the workbench 2. After the steel plate flows to a preset area on the workbench 2, the CNC module 6 controls the self-locking limit mechanism 5 to lock and limit the steel plate, using the upper surface of the workbench 2 to limit the steel plate's lower degree of freedom, and the self-locking limit mechanism 5 to limit the steel plate's upper degree of freedom, front-back degree of freedom, and lateral degree of freedom, respectively. Thus, the steel plate can be fully locked and limited. Next, the pressing mechanism 4, under the control of the preset program of the CNC module 6, moves to abut the upper portion of the steel plate, and the bending drive mechanism 3 bends one side of the steel plate. After the bending operation is completed, the bending drive mechanism 3 and the pressing mechanism 4 are reset, and the self-locking limit mechanism 5 releases the limit connection on the steel plate. Afterwards, the operator can remove the bent steel plate. It can be seen that the utility model of the special CNC bending machine for steel plates can fully limit the connection of the steel plate when bending the steel plate, so as to avoid the problem that the steel plate shifts during bending and affects the bending accuracy.

[0030] Furthermore, the support frame 1 comprises a frame 101, a plurality of brackets 102, and a plurality of guide wheel structures 103. The workbench 2 is disposed on the top of the frame 101, and a plurality of brackets 102 are evenly distributed on the sides of the frame 101. The top of each bracket 102 is movably connected to a guide wheel structure 103. Specifically, each guide wheel structure 103 can rotate around the top of its corresponding bracket 102, and the upper rolling plane of each guide wheel structure 103 is parallel to or coplanar with the upper plane of the workbench 2. Thus, the steel plate to be processed can be guided to a predetermined area on the workbench 2 for processing.

[0031] Furthermore, the bending drive mechanism 3 includes a bending seat frame 301, a bending drive cylinder 302, a bending telescopic rod 303, a bending connection part 304, a bending action plate 305, an action plate traction link 306 and a traction connection part 307; the bending seat frame 301 is fixedly connected to the seat frame 101, and the lower part of the bending drive cylinder 302 is connected to the bending seat frame 301; the bending drive cylinder 302 is drivingly connected to the bending telescopic rod 303, and one end of the bending telescopic rod 303 is movably connected to the bending connection part 304; the bending connection part 304 is connected to the bending action plate 305; the two action plate traction links 306 are relatively arranged at the two end sides of the bending action plate 305, and each action plate traction link 306 is movably connected to one traction connection part 307; the two traction connections 307 are relatively arranged on both sides of the top of the seat frame 101.

[0032] Specifically, the bending drive cylinder 302 can be either an oil cylinder or a pneumatic cylinder, with an oil cylinder being preferred. Its bottom is hingedly connected to the bending base 301 to facilitate its swing during bending. The bending telescopic rod 303 has a piston (not shown) at one end, which is movably mounted within the bending drive cylinder 302. Its other end is hingedly connected to the bending connection portion 304. The numerical control module 6 comprises necessary components such as a circuit board and connecting circuits, and is controllably connected to the bending drive cylinder 302. Thus, when the bending drive cylinder 302 drives the bending telescopic rod 303 to extend or shorten, the bending telescopic rod 303 can vertically elevate or reposition the bending connection 304. When the bending connection 304 is elevated, it can drive the bending action plate 305 to bend along the swing axis of the action plate traction link 306 and the traction connection 307. When the bending connection is pulled and reset, the bending action plate 305 also follows its reset. Furthermore, the bending action plate 305 can bend a steel plate positioned on the workbench 2.

[0033] Furthermore, the pressing mechanism 4 comprises a pressing support 401, a pressing drive cylinder 402, a pressing telescopic rod 403, a pressing lifting connecting rod 404, a lifting guide rail frame 405, a pressing action frame 406 and a pressing portion 407; the pressing support 401 is connected to the side of the seat frame 101, the pressing drive cylinder 402 is arranged in the pressing support 401, and the pressing drive cylinder 402 is drivingly connected to the pressing telescopic rod 403; the pressing The upper part of the pressing telescopic rod 403 is connected to the top pressing lifting link 404, and the top pressing lifting link 404 is movably set in the lifting guide wire rail frame 405. The top pressing lifting link 404 is connected to the top pressing action frame 406; the end side of the top pressing action frame 406 is movably connected to the side surface of the lifting guide wire rail frame 405, and the bottom part of the top pressing action frame 406 is provided with the top pressing part 407, and the top pressing part 407 is movably set on the workbench 2.

[0034] Specifically, the numerical control module 6 is controlled and connected to the top-pressing drive cylinder 402, which can also be an oil cylinder or a pneumatic cylinder. Therefore, when the top-pressing drive cylinder 402 drives the top-pressing telescopic rod 403 to extend or shorten, the top-pressing telescopic rod 403 can be linked with the top-pressing action frame 406 through the top-pressing lifting connecting rod 404, thereby driving the top-pressing action frame to rise or fall. More specifically, the middle portion of the lifting guide rail frame 405 can be slotted to allow the top-pressing lifting connecting rod 404 to be movably arranged therein, and the linear rails on the side of the lifting guide rail frame 405 can connect it to the side of the top-pressing action frame 406, thereby guiding the lifting and lowering movement of the lifting guide rail frame 405. Thus, the pressing portion 407 can be driven by the top-pressing action frame 406 to perform top-pressing and limiting on the steel plate to be bent.

[0035] Furthermore, the self-locking limit mechanism 5 has a self-locking seat frame 501, a self-locking drive cylinder 502, a self-locking telescopic rod 503, a limit link locking claw 504 and a locking claw connecting part 505; the self-locking seat frame 501 is fixedly arranged on the side of the supporting seat frame 1, and the bottom of the self-locking drive cylinder 502 is movably connected to the self-locking seat frame 501, and the self-locking drive cylinder 502 is driven and connected to the self-locking telescopic rod 503; the top of the self-locking telescopic rod 503 is movably connected to the side of the limit link locking claw 504, and the lower part of the limit link locking claw 504 is movably connected to the locking claw connecting part 505, and the locking claw connecting part 505 is connected to the top side of the supporting seat frame 1.

[0036] Specifically, the numerical control module 6 is driven and connected to the self-locking drive cylinder 502; the self-locking drive cylinder 502 can be an oil cylinder or an air cylinder, so that the self-locking drive cylinder 502 can drive the self-locking telescopic rod 503 to extend or shorten under the control of the numerical control module 6; and when the self-locking telescopic rod 503 is extended or shortened, it can drive the limit link locking claw 504 to swing along the connection between it and the locking claw connecting part 505, and then, the steel plate placed on the workbench 2 is limitedly clamped or released.

[0037] To sum up, the utility model is a special CNC bending machine for steel plates, which is respectively provided with a supporting frame 1, a workbench 2, a bending drive mechanism 3, a top pressing mechanism 4, a self-locking limit mechanism 5 and a CNC module 6; the workbench 2 is arranged on the supporting frame 1, the bending drive mechanism 3 is arranged in the supporting frame 1, and the bending drive mechanism 3 is movably connected to the workbench 2; the top pressing mechanism 4 is arranged on the side of the supporting frame 1, and the top pressing mechanism 4 is movably arranged on the workbench 2; the self-locking limit mechanism 5 is arranged on the other side of the supporting frame 1 relative to the top pressing mechanism 4; the CNC module 6 is arranged on the supporting frame 1, and the CNC module 6 is controlled and connected with the bending drive mechanism 3, the top pressing mechanism 4 and the self-locking limit mechanism 5 respectively. The utility model of the special CNC bending machine for steel plates can fully limit the connection of the steel plate when bending the steel plate, so as to avoid the problem that the steel plate shifts during bending and affects the bending accuracy; therefore, the utility model of the special CNC bending machine for steel plates solves the technical problem of how to make the steel plate self-locking and limited when being bent.

[0038] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A CNC bending machine for steel plates, characterized in that: It comprises: a support frame (1), a workbench (2), a bending drive mechanism (3), a top-pressing mechanism (4), a self-locking limit mechanism (5) and a numerical control module (6); the workbench (2) is arranged on the support frame (1), the bending drive mechanism (3) is arranged in the support frame (1), and the bending drive mechanism (3) is movably connected to the workbench (2); the top-pressing mechanism (4) is arranged on the side of the support frame (1), and the top-pressing mechanism (4) is movably arranged on the workbench (2); the self-locking limit mechanism (5) is arranged on the other side of the support frame (1) relative to the top-pressing mechanism (4); the numerical control module (6) is arranged on the support frame (1), and the numerical control module (6) is respectively controlled and connected with the bending drive mechanism (3), the top-pressing mechanism (4) and the self-locking limit mechanism (5).

2. The CNC bending machine for steel plates according to claim 1, characterized in that: The supporting seat frame (1) comprises a seat frame (101), a plurality of brackets (102) and a plurality of guide wheel structures (103).

3. The CNC bending machine for steel plates according to claim 2, characterized in that: The workbench (2) is arranged on the top of the seat frame (101), and a plurality of brackets (102) are evenly distributed on the side of the seat frame (101), and the top of each bracket (102) is movably connected to a guide wheel structure (103).

4. The CNC bending machine for steel plates according to claim 3, characterized in that: The bending drive mechanism (3) comprises a bending seat frame (301), a bending drive cylinder (302), a bending telescopic rod (303), a bending connection part (304), a bending action plate (305), an action plate traction connecting rod (306) and a traction connection part (307).

5. The CNC bending machine for steel plates according to claim 4, characterized in that: The bending seat frame (301) is fixedly connected to the seat frame (101), and the lower part of the bending drive cylinder (302) is connected to the bending seat frame (301); the bending drive cylinder (302) is drivingly connected to the bending telescopic rod (303), and one end of the bending telescopic rod (303) is movably connected to the bending connection part (304); the bending connection part (304) is connected to the bending action plate (305); two action plate traction links (306) are relatively arranged at the two end sides of the bending action plate (305), and each action plate traction link (306) is movably connected to a corresponding traction connection part (307); the two traction connection parts (307) are relatively arranged on both sides of the top of the seat frame (101).

6. The CNC bending machine for steel plates according to claim 5, characterized in that: The pressing mechanism (4) comprises a pressing support (401), a pressing drive cylinder (402), a pressing telescopic rod (403), a pressing lifting connecting rod (404), a lifting guide rail frame (405), a pressing action frame (406) and a pressing portion (407).

7. The CNC bending machine for steel plates according to claim 6, characterized in that: The top-pressing support (401) is connected to the side of the seat frame (101), the top-pressing driving cylinder (402) is arranged in the top-pressing support (401), and the top-pressing driving cylinder (402) is drivingly connected to the top-pressing telescopic rod (403); the upper part of the top-pressing telescopic rod (403) is connected to the top-pressing lifting connecting rod (404), the top-pressing lifting connecting rod (404) is movably arranged in the lifting guide rail frame (405), and the top-pressing lifting connecting rod (404) is connected to the top-pressing action frame (406).

8. The CNC bending machine for steel plates according to claim 7, characterized in that: The end side of the pressing action frame (406) is movably connected to the side surface of the lifting guide rail frame (405), and the pressing part (407) is provided at the lower part of the pressing action frame (406), and the pressing part (407) is movably provided on the workbench (2).

9. The CNC bending machine for steel plates according to claim 1, characterized in that: The self-locking limiting mechanism (5) comprises a self-locking seat frame (501), a self-locking driving cylinder (502), a self-locking telescopic rod (503), a limiting connecting rod locking claw (504) and a locking claw connecting portion (505).

10. The CNC bending machine for steel plates according to claim 9, characterized in that: The self-locking seat frame (501) is fixedly arranged on the side of the supporting seat frame (1); the bottom of the self-locking drive cylinder (502) is movably connected to the self-locking seat frame (501); the self-locking drive cylinder (502) is drivably connected to the self-locking telescopic rod (503); the top of the self-locking telescopic rod (503) is movably connected to the side of the limiting connecting rod locking claw (504); the lower part of the limiting connecting rod locking claw (504) is movably connected to the locking claw connecting part (505); and the locking claw connecting part (505) is connected to the top side of the supporting seat frame (1).

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