Bolt capacitor puncturing equipment

Abstract

The utility model discloses a bolt capacitor puncturing equipment, including puncturing table, puncturing installation mechanism, installation clamping mechanism and clamping auxiliary mechanism, puncturing installation mechanism includes longitudinal frame, hydraulic cylinder, bottom block, puncturing assembly, cooperation frame, clamping pipe and clamping rod, installation clamping mechanism includes clamping groove, embedding plate, inner tooth ring, ring tooth block and bi-directional tooth block, and the clamping auxiliary mechanism includes clamping groove, embedding plate, inner tooth ring, ring tooth block and bi-directional tooth block. According to the puncturing mounting mechanism, the design that a clamping rod penetrates through a matching frame and a bottom block and extends into a clamping pipe is adopted, rapid connection and separation between a puncturing assembly and the bottom block are achieved, the mounting and dismounting process is remarkably simplified through the design, tedious bolt connection is not needed, the maintenance efficiency is greatly improved, and the maintenance cost is reduced. According to the installation clamping mechanism, reliable locking of a clamping rod is achieved through precise meshing transmission of an annular gear block, an inner gear ring and a bidirectional gear block, when the annular gear block rotates, an embedded plate is driven to stretch into or be away from a clamping groove in the side wall of the clamping rod, and a locking or unlocking state is formed.

Description

Technical Field

[0001] This utility model relates to the field of piercing technology, and more specifically, to a bolt capacitor piercing device. Background Technology

[0002] In the existing field of bolt capacitor piercing technology, piercing equipment suffers from numerous design flaws. The most prominent problem is the inconvenience of installing and disassembling the piercing components, severely impacting equipment maintenance efficiency and ease of repair. These issues not only prolong downtime but also increase maintenance costs and operational complexity.

[0003] Traditional piercing equipment typically uses multiple fastening bolts for connection. The installation process requires tightening multiple connection points in a specific order, which is cumbersome and time-consuming. During installation, due to the lack of a precise guiding mechanism, it is difficult for operators to ensure the accurate positioning of the piercing components, and multiple fine adjustments are often required to achieve the desired result. The installation process usually requires the use of various special tools, such as wrenches and screwdrivers, which increases the complexity of operation and the difficulty of tool management.

[0004] Traditional designs typically require disassembling multiple connecting components in a specific order, which is cumbersome and prone to errors. When a malfunction occurs during production, it is impossible to quickly disassemble and replace the piercing components, extending downtime. Many designs do not consider the operating space requirements during disassembly, making it difficult to access certain connecting parts and increasing the difficulty of disassembly. Frequent installation and disassembly can cause fasteners to wear easily, gradually reducing connection stability and even leading to fastener damage. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a bolt capacitor piercing device to solve the technical problems mentioned in the background art, such as the inconvenience of installation and disassembly of the piercing component, and the inconvenience of maintenance or repair.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a bolt capacitor piercing device, comprising a piercing platform, a piercing installation mechanism, an installation clamping mechanism, and a clamping auxiliary mechanism. The piercing installation mechanism includes a longitudinal frame, a hydraulic cylinder, a base block, a piercing assembly, a mating frame, a clamping tube, and a clamping rod. The longitudinal frame is installed at the top end of the piercing platform, the hydraulic cylinder is installed at the top end of the longitudinal frame, the base block is installed at one end of the hydraulic cylinder, the mating frame is installed at the top end of the piercing assembly, the clamping tube is installed on the mating frame, and the clamping rod can pass through the mating frame and the base block and extend into the clamping tube to install the piercing assembly on the base block. The installation clamping mechanism includes a slot, an embedded plate, an internal toothed ring, a ring tooth block, and a bidirectional tooth block. The slot is located on the side wall of the clamping rod, the ring tooth block is installed at one end of the embedded plate, the ring tooth block is rotatably installed inside the side wall of the clamping tube, the internal toothed ring is rotatably limited and installed on the outer wall of the clamping tube, and the bidirectional tooth block is meshed between the ring tooth block and the internal toothed ring. The rotation of the ring tooth block causes the embedded plate to extend into or away from the slot.

[0009] The present invention is further configured such that the snap-fit ​​auxiliary mechanism includes an outer rotating sleeve, a rotating block, a positioning spring rod, and a positioning hole. The outer rotating sleeve is rotatably mounted on the outer wall of the snap-fit ​​tube. Multiple sets of rotating blocks are mounted on the bottom end of the outer rotating sleeve. The top end of the outer rotating sleeve and the bottom end of the inner toothed ring are connected in a mating manner. Multiple sets of positioning spring rods are arranged in a ring on the outer wall of the snap-fit ​​tube. The positioning hole is set on the rotating block. The positioning hole gradually inserts the positioning spring rod, so that the rotating block and the outer rotating sleeve rotate stably, thereby stably driving the inner toothed ring to rotate.

[0010] The present invention is further configured such that an adjustment frame is installed at the top end of the piercing platform, and the transmission belt assembly is installed at the top end of the adjustment frame. The adjustment frame provides support for the transmission belt assembly, thereby increasing the height adjustment capability.

[0011] The present invention is further configured such that an adjusting plate is installed at the top end of the transmission belt assembly, and a clamping assembly is installed at the top end of the adjusting plate, and a bolt is clamped on the clamping assembly. The adjusting plate is installed on the top of the transmission belt assembly, providing fine positioning and adjustment capabilities.

[0012] The present invention is further configured such that a lead screw adjustment assembly is laterally installed at the top end of the longitudinal frame, and a hydraulic cylinder is installed on the lead screw adjustment assembly, the lead screw adjustment assembly providing the hydraulic cylinder with precise lateral adjustment capability.

[0013] The present invention is further configured such that a connecting plate is installed at the bottom end of the side wall of the clamping tube, and the connecting plate is fixedly installed on the mating frame, thereby enhancing the overall structural rigidity.

[0014] The present invention is further configured such that a motion groove is provided in the side wall of the card tube, and the embedded plate and the bidirectional tooth block are rotatably installed in the motion groove, the motion groove limiting the rotation range of the embedded plate and the bidirectional tooth block.

[0015] The present invention is further configured such that two sets of clamping tubes are provided, and the clamping tubes are respectively installed crosswise on both sides of the mating frame, and the clamping rod passes through the other end of the mating frame and is fixedly engaged with the clamping tubes.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a bolt capacitor piercing device, which has the following beneficial effects:

[0018] This utility model features a perforation installation mechanism. It employs a design where a snap-fit ​​rod passes through the mounting bracket and the base block and extends into the snap-fit ​​tube, enabling rapid connection and separation between the perforation assembly and the base block. This design significantly simplifies the installation and disassembly process, eliminating the need for cumbersome bolt connections and greatly improving maintenance efficiency. In particular, the design of two sets of cross-installed snap-fit ​​tubes enhances connection stability while maintaining ease of operation, solving the problem of inconvenient installation and disassembly of perforation assemblies in traditional equipment.

[0019] This utility model is equipped with an installation locking mechanism. Through the precise meshing transmission of the ring tooth block, the internal tooth ring, and the bidirectional tooth block, a reliable locking of the locking rod is achieved. When the ring tooth block rotates, it drives the embedded plate to extend into or away from the locking groove on the side wall of the locking rod, forming a locked or unlocked state. This not only provides a firm locking effect and ensures stability during the piercing process, but also realizes a quick unlocking function, which facilitates the quick disassembly of the piercing assembly and improves the maintenance response speed of the equipment.

[0020] This utility model is equipped with a locking auxiliary mechanism. Through the cooperation of the outer rotating sleeve, rotating block, positioning spring rod, and positioning hole, a hierarchical locking system is formed. This allows the operator to achieve precise control of the internal gear ring through simple rotation, and prevents accidental loosening by progressively inserting the positioning spring rod through the positioning hole. This not only enhances the reliability of locking, but also provides a convenient operation method, allowing maintenance personnel to complete the installation and disassembly of the piercing component without professional tools, greatly reducing the technical requirements and operational difficulty. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of this utility model;

[0022] Figure 2 This is a schematic diagram of the bolt clamping structure in this utility model;

[0023] Figure 3 This is a structural schematic diagram of the installation method of the piercing component in this utility model;

[0024] Figure 4 This is a schematic diagram of the installation snap-fit ​​mechanism and snap-fit ​​auxiliary mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the mounting clipping mechanism and the clipping auxiliary mechanism in this utility model.

[0026] In the diagram: 1. Puncture platform; 2. Longitudinal frame; 3. Hydraulic cylinder; 4. Base block; 5. Puncture assembly; 6. Mating frame; 7. Clamping pipe; 8. Clamping rod; 9. Clamping groove; 10. Embedded plate; 11. Internal gear ring; 12. Ring gear block; 13. Bidirectional gear block; 14. Outer rotating sleeve; 15. Rotating block; 16. Positioning spring rod; 17. Positioning hole; 18. Adjusting frame; 19. Adjusting plate; 20. Clamping assembly; 21. Lead screw adjusting assembly; 22. Connecting plate; 23. Motion groove; 301. Transmission belt assembly. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-5 The bolt capacitor piercing device includes a piercing platform 1, a piercing installation mechanism, an installation clamping mechanism, and a clamping auxiliary mechanism. The piercing installation mechanism includes a longitudinal frame 2, a hydraulic cylinder 3, a base block 4, a piercing assembly 5, a mating frame 6, a clamping tube 7, and a clamping rod 8. The longitudinal frame 2 is installed at the top end of the piercing platform 1, the hydraulic cylinder 3 is installed at the top end of the longitudinal frame 2, the base block 4 is installed at one end of the hydraulic cylinder 3, the mating frame 6 is installed at the top end of the piercing assembly 5, the clamping tube 7 is installed on the mating frame 6, and the clamping rod 8 can pass through the mating frame 6 and the base block 4 and extend into... Inside the snap-fit ​​connector 7, the piercing assembly 5 is installed on the base block 4. The snap-fit ​​mechanism includes a snap-fit ​​groove 9, an insert plate 10, an internal toothed ring 11, a ring tooth block 12, and a bidirectional tooth block 13. The snap-fit ​​groove 9 is located on the side wall of the snap-fit ​​rod 8. The ring tooth block 12 is installed at one end of the insert plate 10 and is rotatably installed inside the side wall of the snap-fit ​​connector 7. The internal toothed ring 11 is rotatably installed on the outer wall of the snap-fit ​​connector 7. The bidirectional tooth block 13 is engaged between the ring tooth block 12 and the internal toothed ring 11. The rotation of the ring tooth block 12 causes the insert plate 10 to extend into or away from the snap-fit ​​groove 9.

[0031] In this embodiment, to facilitate the installation and removal of the piercing assembly 5, the piercing installation mechanism first provides vertical support through the longitudinal frame 2. The hydraulic cylinder 3 is installed on the top of the longitudinal frame 2 to provide the pressure and precise control required for piercing. During operation, the hydraulic cylinder 3 drives the bottom block 4 to move downward. The bottom block 4 is connected to the piercing assembly 5 through the snap-fit ​​rod 8. The snap-fit ​​rod 8 passes through the mating frame 6 and the bottom block 4 and extends into the snap-fit ​​tube 7 installed on the mating frame 6 to form a stable connection structure, ensuring that the piercing assembly 5 is firmly installed on the bottom block 4, providing a stable platform for precise piercing. The installation snap-fit ​​mechanism achieves the locking function through a precision gear meshing system. When it is necessary to lock the piercing position, rotate the inner toothed ring 11, and transmit the rotational force to the ring toothed block 12 through the bidirectional toothed block 13. The rotation of the ring toothed block 12 drives the embedded plate 10 to move, so that the embedded plate 10 extends into the slot 9 on the side wall of the snap-fit ​​rod 8 to form a firm lock. When unlocking, rotate the inner toothed ring 11 in the opposite direction to make the embedded plate 10 exit from the slot 9, release the snap-fit ​​rod 8, and allow the piercing assembly 5 to be installed, disassembled and adjusted.

[0032] The snap-fit ​​auxiliary mechanism includes an outer rotating sleeve 14, a rotating block 15, a positioning spring rod 16, and a positioning hole 17. The outer rotating sleeve 14 is rotatably mounted on the outer wall of the snap-fit ​​tube 7. Multiple sets of rotating blocks 15 are mounted on the bottom end of the outer rotating sleeve 14. The top end of the outer rotating sleeve 14 and the bottom end of the inner toothed ring 11 are connected in a mating manner. Multiple sets of positioning spring rods 16 are arranged in a ring on the outer wall of the snap-fit ​​tube 7. The positioning hole 17 is set on the rotating block 15. The positioning hole 17 gradually inserts the positioning spring rod 16, so that the rotating block 15 and the outer rotating sleeve 14 rotate stably, thereby stably driving the inner toothed ring 11 to rotate.

[0033] In this embodiment, the locking effect is enhanced by the cooperation between the outer rotating sleeve 14 and the inner toothed ring 11. The outer rotating sleeve 14 is rotatably mounted on the outer wall of the retaining tube 7, and its top is connected to the bottom of the inner toothed ring 11. During operation, the rotating block 15 mounted on the bottom of the outer rotating sleeve 14 is rotated, and the positioning hole 17 on the rotating block 15 is successively fitted into the positioning spring rod 16 on the outer wall of the retaining tube 7, producing a graded locking effect, so that the outer rotating sleeve 14 can rotate stably and drive the inner toothed ring 11 to rotate, preventing the locking state from being accidentally loosened and ensuring the stability during the piercing process.

[0034] Please see Figures 1-5As a supplementary embodiment of the bolt capacitor piercing device for the piercing installation mechanism, the installation clamping mechanism and the clamping auxiliary mechanism: An adjusting frame 18 is installed at the top end of the piercing platform 1, and a transmission belt assembly 301 is installed at the top end of the adjusting frame 18. An adjusting plate 19 is installed at the top end of the transmission belt assembly 301, and a clamping assembly 20 is installed at the top end of the adjusting plate 19. The bolt is clamped on the clamping assembly 20. A screw adjusting assembly 21 is installed laterally at the top end of the longitudinal frame 2, and a hydraulic cylinder 3 is installed on the screw adjusting assembly 21. A connecting plate 22 is installed at the bottom end of the side wall of the clamping pipe 7, and the connecting plate 22 is fixedly installed on the mating frame 6. A moving groove 23 is opened in the side wall of the clamping pipe 7, and the embedded plate 10 and the bidirectional toothed block 13 are rotatably installed in the moving groove 23. Two sets of clamping pipes 7 are provided, and the clamping pipes 7 are respectively cross-installed on both sides of the mating frame 6. The clamping rod 8 passes through the other end of the mating frame 6 and is fixedly clamped with the clamping pipe 7.

[0035] More specifically, the bolt is fixed to the adjusting plate 19 by the clamping assembly 20. The adjusting plate 19 is installed on top of the transmission belt assembly 301 for precise positioning. The position of the hydraulic cylinder 3 is adjusted laterally by the lead screw adjusting assembly 21. At the same time, the transmission belt assembly 301 and the adjusting frame 18 can be adjusted to ensure that the piercing position is accurately aligned with the target position of the bolt. The piercing assembly 5 is connected to the bottom block 4 by the mating frame 6. The clamping rod 8 passes through the mating frame 6 and the bottom block 4 and extends into the clamping tubes 7 installed crosswise on both sides to form a stable connection structure. The internal gear ring 11 is rotated. The ring tooth block 12 is rotated, causing the embedded plate 10 to extend into the slot 9 of the snap-fit ​​rod 8 and lock in place. Using the snap-fit ​​auxiliary mechanism, the rotating block 15 at the bottom of the outer rotating sleeve 14 is rotated, causing the positioning hole 17 to be fitted into the positioning spring rod 16 step by step, ensuring a stable and reliable locking state. The hydraulic cylinder 3 provides precise pressure and control, driving the piercing assembly 5 to perform precise piercing operation on the bolt capacitor. When it is necessary to disassemble the piercing assembly 5 for maintenance and repair, the outer rotating sleeve 14 is rotated in the opposite direction, causing the snap-fit ​​rod 8 to disengage from the snap-fit ​​tube 7, and the piercing assembly 5 can be disassembled.

[0036] In summary, when the overall equipment is in use or operation: when the piercing installation mechanism is in operation, it facilitates the installation and disassembly of the piercing assembly 5. The piercing installation mechanism first provides vertical support through the longitudinal frame 2. The hydraulic cylinder 3 is installed on the top of the longitudinal frame 2 to provide the pressure and precise control required for piercing. During operation, the hydraulic cylinder 3 drives the bottom block 4 to move downward. The bottom block 4 is connected to the piercing assembly 5 through the snap-fit ​​rod 8. The snap-fit ​​rod 8 passes through the mating frame 6 and the bottom block 4 and extends into the snap-fit ​​tube 7 installed on the mating frame 6, forming a stable connection structure to ensure that the piercing assembly 5 is firmly installed on the bottom block 4, providing a stable platform for precise piercing.

[0037] When the snap-fit ​​mechanism is in operation, it achieves a locking function through a precision gear meshing system. When the piercing position needs to be locked, the internal gear ring 11 is rotated, and the rotational force is transmitted to the ring gear block 12 through the bidirectional gear block 13. The rotation of the ring gear block 12 drives the embedded plate 10 to move, so that the embedded plate 10 extends into the slot 9 on the side wall of the snap-fit ​​rod 8, forming a firm lock. When unlocking, the internal gear ring 11 is rotated in the opposite direction, so that the embedded plate 10 is removed from the slot 9, releasing the snap-fit ​​rod 8, allowing the piercing assembly 5 to be installed, disassembled, and adjusted.

[0038] When the locking auxiliary mechanism is in operation, the locking effect is enhanced by the cooperation between the outer rotating sleeve 14 and the inner toothed ring 11. The outer rotating sleeve 14 is rotatably installed on the outer wall of the locking tube 7, and its top is connected to the bottom of the inner toothed ring 11. During operation, the rotating block 15 installed at the bottom of the outer rotating sleeve 14 is rotated. The positioning hole 17 on the rotating block 15 is successively fitted into the positioning spring rod 16 on the outer wall of the locking tube 7, producing a graded locking effect, so that the outer rotating sleeve 14 can rotate stably and drive the inner toothed ring 11 to rotate, preventing the locking state from being accidentally loosened and ensuring the stability during the piercing process.

[0039] The bolt is fixed to the adjusting plate 19 by the clamping assembly 20. The adjusting plate 19 is installed on top of the transmission belt assembly 301 for precise positioning. The position of the hydraulic cylinder 3 is adjusted laterally by the lead screw adjusting assembly 21. At the same time, the transmission belt assembly 301 and the adjusting frame 18 can be adjusted to ensure that the piercing position is accurately aligned with the target position of the bolt. The piercing assembly 5 is connected to the base block 4 through the mating frame 6. The clamping rod 8 passes through the mating frame 6 and the base block 4 and extends into the clamping tubes 7 installed crosswise on both sides to form a stable connection structure. The internal gear ring 11 is rotated to drive the ring. The toothed block 12 rotates, causing the embedded plate 10 to extend into the slot 9 of the snap-fit ​​rod 8 and lock into position. Using the snap-fit ​​auxiliary mechanism, the rotating block 15 at the bottom of the outer rotating sleeve 14 is rotated, causing the positioning hole 17 to be fitted into the positioning spring rod 16 step by step, ensuring a stable and reliable locking state. The hydraulic cylinder 3 provides precise pressure and control, driving the piercing assembly 5 to perform precise piercing operation on the bolt capacitor. When it is necessary to disassemble the piercing assembly 5 for maintenance and repair, the outer rotating sleeve 14 is rotated in the opposite direction, causing the snap-fit ​​rod 8 to disengage from the snap-fit ​​tube 7, and the piercing assembly 5 can be disassembled.

[0040] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bolt capacitor puncturing device, comprising a puncturing table (1), a puncturing mounting mechanism, a mounting clamping mechanism and a clamping auxiliary mechanism, characterized in that: The piercing installation mechanism includes a longitudinal frame (2), a hydraulic cylinder (3), a base block (4), a piercing assembly (5), a mating frame (6), a clamping tube (7), and a clamping rod (8). The longitudinal frame (2) is installed at the top end of the piercing platform (1), the hydraulic cylinder (3) is installed at the top end of the longitudinal frame (2), the base block (4) is installed at one end of the hydraulic cylinder (3), the mating frame (6) is installed at the top end of the piercing assembly (5), the clamping tube (7) is installed on the mating frame (6), and the clamping rod (8) can pass through the mating frame (6) and the base block (4) and extend into the clamping tube (7). The piercing assembly (5) is installed on the base block (4). The mounting and snapping mechanism includes a slot (9), an insert plate (10), an internal toothed ring (11), a ring tooth block (12), and a bidirectional tooth block (13). The slot (9) is set on the side wall of the snapping rod (8). The ring tooth block (12) is installed at one end of the insert plate (10). The ring tooth block (12) is rotatably installed in the side wall of the snapping tube (7). The internal toothed ring (11) is limited and rotatably installed on the outer wall of the snapping tube (7). The bidirectional tooth block (13) is meshed between the ring tooth block (12) and the internal toothed ring (11).

2. The bolted capacitor puncturing apparatus of claim 1, wherein: The snap-fit ​​auxiliary mechanism includes an outer rotating sleeve (14), a rotating block (15), a positioning spring rod (16), and a positioning hole (17). The outer rotating sleeve (14) is rotatably mounted on the outer wall of the snap-fit ​​tube (7). Multiple sets of rotating blocks (15) are mounted on the bottom end of the outer rotating sleeve (14). The top end of the outer rotating sleeve (14) and the bottom end of the inner toothed ring (11) are connected in a fit. Multiple sets of positioning spring rods (16) are arranged in a ring on the outer wall of the snap-fit ​​tube (7). The positioning hole (17) is set on the rotating block (15). The positioning hole (17) gradually fits the positioning spring rod (16) into the rotating block (15), so that the rotating block (15) and the outer rotating sleeve (14) rotate stably, thereby stably driving the inner toothed ring (11) to rotate.

3. The bolted capacitor puncturing apparatus of claim 1, wherein: An adjustment frame (18) is installed at the top end of the piercing platform (1), and a transmission belt assembly (301) is installed at the top end of the adjustment frame (18).

4. The bolted capacitor puncturing apparatus of claim 3, wherein: An adjusting plate (19) is installed at the top end of the transmission belt assembly (301), and a clamping assembly (20) is installed at the top end of the adjusting plate (19), and the bolt is clamped on the clamping assembly (20).

5. The bolted capacitor puncturing apparatus of claim 1, wherein: The top end of the longitudinal frame (2) is horizontally equipped with a lead screw adjustment assembly (21), and the hydraulic cylinder (3) is installed on the lead screw adjustment assembly (21).

6. The bolted capacitor puncturing apparatus of claim 1, wherein: A connecting plate (22) is installed at the bottom of the side wall of the card tube (7), and the connecting plate (22) is fixedly installed on the mating frame (6).

7. The bolted capacitor puncturing apparatus of claim 1, wherein: The side wall of the card tube (7) is provided with a motion groove (23), and the embedded plate (10) and the bidirectional tooth block (13) are rotatably installed in the motion groove (23).

8. The bolted capacitor puncturing apparatus of claim 1, wherein: The clamping tube (7) is provided in two sets, and the clamping tube (7) is installed crosswise on both sides of the mating frame (6). The clamping rod (8) passes through the other end of the mating frame (6) and is fixedly clamped to the clamping tube (7).

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