Tool bearing device for PLC maintenance

Abstract

The utility model relates to the technical field of PLC maintenance, in particular to a tool bearing device for PLC maintenance, which comprises a device frame body, stable anti-slip mechanisms are arranged on the surface of the device frame body, and a classified storage mechanism is arranged in a containing frame. And position adjusting mechanisms are arranged on the inner walls of the first arc-shaped block, the second arc-shaped block and the fixing frame. According to the tool bearing device, the overall stability of the tool bearing device is higher when the tool bearing device is used, tools can be stored in the containing frame in a classified mode when the tool bearing device is used, and the tools are more convenient to take through the tool bearing device; and when the tool bearing device is used, the position of the containing frame can be adjusted according to use requirements, the user can take the tools more conveniently through the position of the containing frame, and the tool bearing device is more convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of PLC maintenance, specifically to a tool bearing device for PLC maintenance. BACKGROUND

[0002] PLC programmable logic controller, it adopts a kind of programmable memory, for its internal storage program, execute logic operation, sequence control, timing, count and arithmetic operation etc. the instruction of user-oriented, and control various types of machinery or production process by digital or analog input / output, PLC uses tool when maintenance, and tool needs to use a kind of tool bearing device for PLC maintenance when storing.

[0003] The existing tool bearing device can rarely protect the tool when in use, so that the tool is easily damaged during the use of the bearing device. In addition, the existing tool bearing device also has some shortcomings to some extent. The stability of the tool bearing device is required to be high when in use, and the stability of the existing tool bearing device is not good enough when in use. This greatly reduces the overall stability of the tool bearing device when in use. The tool needs to be stored in a classified manner when the tool bearing device is in use. The existing tool bearing device usually does not have the function of storing tools in a classified manner when in use. This makes it difficult to store tools in the inside of the containing frame when the tool bearing device is in use, making it inconvenient to take tools when the tool bearing device is in use. The position of the containing frame needs to be adjusted when the tool bearing device is in use. The existing tool bearing device is not convenient to adjust the position of the containing frame. This makes it inconvenient for users to take tools when the position of the containing frame is adjusted, making it inconvenient to use the tool bearing device. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a tool bearing device for PLC maintenance to solve the problem of poor stability and stability when the tool bearing device is in use, the function of storing tools in a classified manner is not usually available, and it is not convenient to adjust the position of the containing frame.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tool support device for PLC maintenance, comprising a device frame, a fixing frame mounted on the top surface of the device frame, a first arc-shaped block and a second arc-shaped block on each surface of the fixing frame, the first arc-shaped blocks being threadedly fastened to the surfaces of the second arc-shaped blocks by screws, a holding frame on one side of each fixing frame, the surface of the holding frame being fixed to the surface of the second arc-shaped block, a door being provided on the surface of the holding frame, and the door being detachably connected to the holding frame. The surface of each holding frame is provided with a slot for holding items. The surface of each device frame is provided with a stabilizing anti-slip mechanism. The stabilizing anti-slip mechanism includes a push-pull rod, a stabilizing suction cup, a fixing clip, a compression spring, a sliding plate, and a guide groove. The holding frame is provided with a classification storage mechanism. The classification storage mechanism includes a guide slider, a holding box, and a classification storage group. The inner walls of the first arc-shaped block, the second arc-shaped block, and the fixing frame are all provided with a position adjustment mechanism. The position adjustment mechanism includes a fixing groove, a fixing block, and a position adjustment component.

[0006] Preferably, each surface of the device frame is provided with a push-pull rod, one end of which passes through the device frame and extends to the bottom of the device frame. A sliding plate is installed on the surface of the push-pull rod. A guide groove is provided on the inner wall of the device frame. The guide groove and the surface of the sliding plate slide against each other. A fixing clip is installed on the surface of the sliding plate. The fixing clip is engaged with the inner wall of the device frame.

[0007] Preferably, the inner wall of the device frame is equipped with a compression spring, one end of which is fixed to the surface of the sliding plate. The push-pull rod slides in cooperation with the inner wall of the device frame, and a stabilizing suction cup for preventing slippage is installed on the surface of the bottom of the push-pull rod.

[0008] Preferably, the categorized storage group is located inside the holding frame. The categorized storage group consists of a clamping plate, an elastic device, and a partition plate. The holding frame is equipped with a holding box for holding items. Guide sliders are installed on both sides of the holding box, and the guide sliders slide against the inner wall of the holding frame.

[0009] Preferably, the interior of the holding box is equipped with a partition for separating tools, and clamping plates for holding the tools and preventing them from shaking are provided on both sides of the partition. The surfaces on both sides of the partition are equipped with equally spaced elastic members, one end of which is fixed to the surface of the clamping plate.

[0010] Preferably, the position adjusting assembly is arranged on the inner wall of the first arc block, the second arc block and the fixing frame, and is composed of an arc clamping groove, an arc clamping piece and an extension spring.

[0011] Preferably, the surface of the fixing block is provided with the arc clamping piece, the arc clamping piece and the inner wall of the fixing block are in sliding fit with each other, and the surface of the fixing frame is provided with arc clamping grooves at equal intervals.

[0012] Preferably, the surfaces of the arc clamping groove and the arc clamping piece are in clamping fit with each other, the surface of the arc clamping piece is provided with the extension spring, and one end of the extension spring is fixed to the inner wall of the fixing block.

[0013] Compared with the prior art, the tool bearing device for PLC maintenance can not only make the device frame body stably stop at a specified position when the tool bearing device is used, but also make the overall stability of the tool bearing device when used higher, so that the tool bearing device can store tools in the interior of the containing frame in a classified manner when used, and the tool bearing device is more convenient for taking tools, and the position of the containing frame can be adjusted according to the use requirement when the tool bearing device is used, so that the position of the containing frame is more convenient for a user to take tools, and the tool bearing device is more convenient to use.

[0014] 1. By setting the stable anti-walking mechanism, the user pushes the push-pull rod downward, so that the push-pull rod slides on the inner wall of the device frame body, the fixing clamp under normal state is clamped to the inner wall of the device frame body, so that the push-pull rod drives the stable suction cup away from the ground, when the user pushes the push-pull rod downward, the push-pull rod drives the sliding plate to slide in the interior of the device frame body, the sliding plate slides in the guide groove under the action of the guide groove, the fixing clamp is away from the inner wall of the device frame body, so that the push-pull rod drives the stable suction cup to move downward to contact the ground, since the stable suction cup adopts a negative pressure suction cup structure, under the joint action of the push-pull rod and the stable suction cup, the device frame body can be prevented from walking when parking, so that the tool bearing device can stably stop at a specified position when used, and the overall stability of the tool bearing device when used is higher.

[0015] 2、By being provided with the classified storage mechanism, the user pulls the door body, takes the door body from the surface of the containing frame, pulls the containing box inside the containing frame, makes the containing box drive the guide sliding block to slide inside the containing frame, respectively places the tools inside the containing box, separates the tools under the action of the partition plate, drives the clamping plate to move under the elastic force of the elastic device on the surface of the partition plate, makes the elastic device drive the clamping plate to move to contact the surface of the tool, clamps and fixes the tool inside the containing box under the joint action of the elastic device and the clamping plate, avoids the phenomenon that the tools collide with each other inside the containing box, realizes the classified storage function of the tool bearing device on the tools, so that the tool bearing device can classify and store the tools inside the containing frame when used, makes the tool bearing device more convenient when taking the tools;

[0016] 3、By being provided with the position adjusting mechanism, the first arc block and the second arc block drive the fixed block to slide inside the fixed slot, guide the first arc block and the second arc block under the joint action of the fixed slot and the fixed block, at this time, drive the arc-shaped clamping piece to move under the elastic force of the extension spring, make the extension spring drive the arc-shaped clamping piece to clamp inside the corresponding arc-shaped clamping slot, adjust the position of the first arc block and the second arc block under the clamping action of the arc-shaped clamping piece and the arc-shaped clamping slot, then the user tightens the screw on the surface of the first arc block, thereby fixing the containing frame on the surface of the fixed frame, thereby adjusting the height position of the containing frame, realizes the function that the tool bearing device adjusts the position of the containing frame, so that the tool bearing device can adjust the position of the containing frame according to the use needs when used, makes the position of the containing frame more convenient for the user to take the tools, makes the tool bearing device more convenient when used. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is three-dimensional structure schematic view of the utility model;

[0018] Figure 2 It is main view cross section structure schematic view of the utility model;

[0019] Figure 3 It is the utility model's Figure 2 Enlarged structure schematic view of stable anti-walking mechanism;

[0020] Figure 4 It is the utility model's Figure 2 Enlarged structure schematic view of classified storage mechanism;

[0021] Figure 5 It is enlarged structure schematic view of position adjusting mechanism of the utility model.

[0022] In the diagram: 1. Device frame; 101. Fixing frame; 102. First arc-shaped block; 103. Second arc-shaped block; 104. Door; 105. Container frame; 106. Placement slot; 2. Stabilizing and anti-slipping mechanism; 21. Push-pull rod; 22. Stabilizing suction cup; 23. Fixing clip; 24. Compression spring; 25. Sliding plate; 26. Guide slot; 3. Classification and storage mechanism; 31. Guide slider; 32. Container box; 33. Classification and storage group; 331. Clamping plate; 332. Elastic device; 333. Divider plate; 4. Position adjustment mechanism; 41. Fixing slot; 42. Fixing block; 43. Position adjustment component; 431. Arc-shaped slot; 432. Arc-shaped clip; 433. Extension spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] The structure of the tool carrier device for PLC maintenance provided by this utility model is as follows: Figure 1 and Figure 2 As shown, the device includes a frame 1. A mounting bracket 101 is installed on the top surface of the frame 1. Each mounting bracket 101 has a first arc-shaped block 102 and a second arc-shaped block 103. The first arc-shaped block 102 is threadedly fastened to the surface of the second arc-shaped block 103 by screws. Each side of the mounting bracket 101 has a holding frame 105. The surface of the holding frame 105 is fixed to the surface of the second arc-shaped block 103. The surface of the holding frame 105 has a door 104. The door 104 and the holding frame 105 are detachably connected. Each surface of the holding frame 105 has a placement slot 106 for holding items.

[0025] Furthermore, such as Figure 2 and Figure 3As shown, the surface of the device frame body 1 is provided with a stable anti-walking mechanism 2, the inside of the stable anti-walking mechanism 2 contains a push-pull rod 21, a stable suction cup 22, a fixed clamping piece 23, a compression spring 24, a sliding plate 25 and a guide groove 26, the surface of the device frame body 1 is provided with a push-pull rod 21, one end of the push-pull rod 21 penetrates through the device frame body 1 and extends to the lower side of the device frame body 1, the surface of the push-pull rod 21 is installed with a sliding plate 25, the inner wall of the device frame body 1 is provided with a guide groove 26, the surface of the guide groove 26 and the sliding plate 25 are slidably connected, the surface of the sliding plate 25 is installed with a fixed clamping piece 23, the fixed clamping piece 23 and the inner wall of the device frame body 1 are clamped and matched, the inner wall of the device frame body 1 is installed with a compression spring 24, one end of the compression spring 24 is fixed to the surface of the sliding plate 25, the push-pull rod 21 and the inner wall of the device frame body 1 are slidably connected, the surface of the bottom position of the push-pull rod 21 is installed with a stable suction cup 22 for anti-walking.

[0026] In implementation, the user pushes the push-pull rod 21 downward, so that the push-pull rod 21 slides on the inner wall of the device frame body 1, the fixed clamping piece 23 in the normal state is clamped to the inner wall of the device frame body 1, so that the push-pull rod 21 drives the stable suction cup 22 to move away from the ground, when the user pushes the push-pull rod 21 downward, at this time, the push-pull rod 21 drives the sliding plate 25 to slide in the device frame body 1, the sliding plate 25 is driven to move in the device frame body 1 under the elastic force of the compression spring 24, at this time, the sliding plate 25 slides in the guide groove 26, the sliding plate 25 is guided under the action of the guide groove 26, the fixed clamping piece 23 moves away from the inner wall of the device frame body 1, so that the push-pull rod 21 drives the stable suction cup 22 to move downward to contact the ground, because the stable suction cup 22 adopts a negative pressure suction cup structure, under the joint action of the push-pull rod 21 and the stable suction cup 22, it can ensure that the device frame body 1 will not appear the walking phenomenon when it is parked, so as to realize the function of stable anti-walking of the tool carrying device.

[0027] Further, as shown in Figure 2 and Figure 4 , the inside of the containing frame 105 is provided with a classified storage mechanism 3, the inside of the classified storage mechanism 3 contains a guide sliding block 31, a containing box 32 and a classified storage group 33, the classified storage group 33 is arranged in the inside of the containing frame 105, the classified storage group 33 is composed of a clamping plate 331, a spring 332 and a partition plate 333, the inside of the containing frame 105 is provided with a containing box 32 for containing articles, the surfaces of the two sides of the containing box 32 are installed with guide sliding blocks 31, the guide sliding blocks 31 and the inner wall of the containing frame 105 are slidably connected, the inside of the containing box 32 is installed with partition plates 333 for separating tools, the two sides of the partition plate 333 are provided with clamping plates 331 for clamping and preventing shaking of the tools, the surfaces of the two sides of the partition plate 333 are installed with springs 332 at equal intervals, one end of the spring 332 is fixed to the surface of the clamping plate 331.

[0028] In implementation, the user pulls the door body 104, removes the door body 104 from the surface of the containing frame 105, and then pulls the containing box 32 inside the containing frame 105, so that the containing box 32 drives the guide sliding block 31 to slide inside the containing frame 105. The tools are placed in the containing box 32, and are separated by the separating plate 333. The clamping plate 331 is driven to move by the elastic force of the elastic device 332 on the surface of the separating plate 333, so that the elastic device 332 drives the clamping plate 331 to move to contact the surface of the tool. The tool is clamped and fixed in the containing box 32 by the elastic device 332 and the clamping plate 331, so as to avoid the phenomenon of mutual collision of the tools in the containing box 32, so as to realize the function of classified storage of the tool carrying device.

[0029] Further, as shown in Figure 2 and Figure 5 , the first arc block 102, the second arc block 103 and the inner wall of the fixed frame 101 are provided with a position adjusting mechanism 4. The position adjusting mechanism 4 comprises a fixed groove 41, a fixed block 42 and a position adjusting assembly 43. The position adjusting assembly 43 is arranged on the inner wall of the first arc block 102, the second arc block 103 and the fixed frame 101. The position adjusting assembly 43 is composed of an arc-shaped clamping groove 431, an arc-shaped clamping piece 432 and an extension spring 433. The inner wall of the first arc block 102 and the second arc block 103 is provided with the fixed block 42. The surface of the fixed frame 101 is provided with the fixed groove 41. The surface of the fixed groove 41 and the fixed block 42 is slidably connected. The surface of the fixed block 42 is provided with the arc-shaped clamping piece 432. The arc-shaped clamping piece 432 and the inner wall of the fixed block 42 are slidably connected. The surface of the fixed frame 101 is provided with arc-shaped clamping grooves 431 at equal intervals. The arc-shaped clamping grooves 431 and the surface of the arc-shaped clamping piece 432 are connected. The surface of the arc-shaped clamping piece 432 is provided with the extension spring 433. One end of the extension spring 433 is fixed to the inner wall of the fixed block 42.

[0030] In implementation, the first arc block 102 and the second arc block 103 drive the fixed block 42 to slide inside the fixed groove 41, and the fixed groove 41 and the fixed block 42 jointly guide the first arc block 102 and the second arc block 103, at this time, the extension spring 433 drives the arc-shaped clamping piece 432 to move under the elastic force of the extension spring 433, so that the extension spring 433 drives the arc-shaped clamping piece 432 to be clamped inside the corresponding arc-shaped clamping groove 431, and the position of the first arc block 102 and the second arc block 103 is adjusted under the clamping cooperation of the arc-shaped clamping piece 432 and the arc-shaped clamping groove 431, then the user tightens the screw on the surface of the first arc block 102, thereby fixing the containing frame 105 on the surface of the fixed frame 101, thereby adjusting the height position of the containing frame 105, to realize the function of the tool carrying device to adjust the position of the containing frame 105.

[0031] Working principle: in use, first push the device frame body 1 to the specified position, then the user pushes the push-pull rod 21 downward, so that the push-pull rod 21 slides in the inner wall of the device frame body 1, and the fixed clamping piece 23 is clamped to the inner wall of the device frame body 1 in the normal state, so that the push-pull rod 21 drives the stable suction cup 22 to move away from the ground, when the user pushes the push-pull rod 21 downward, at this time, the push-pull rod 21 drives the sliding plate 25 to slide inside the device frame body 1, and the sliding plate 25 moves inside the device frame body 1 under the elastic force of the compression spring 24, at this time, the sliding plate 25 slides inside the guide groove 26, and the guide groove 26 guides the sliding plate 25, the fixed clamping piece 23 moves away from the inner wall of the device frame body 1, so that the push-pull rod 21 drives the stable suction cup 22 to move downward to contact the ground, because the stable suction cup 22 adopts a negative pressure suction cup structure, under the joint action of the push-pull rod 21 and the stable suction cup 22, the device frame body 1 can be prevented from rolling when parked, to realize the function of the tool carrying device to prevent rolling, thereby making the tool carrying device stable when parked at the specified position, and the overall stability of the tool carrying device is higher when in use.

[0032] Subsequently, the user will be placed in the first arc block 102 and the second arc block 103 respectively on the surface of the fixed frame 101, and then tighten the screws, respectively fixed in the surface of the fixed frame 101, the user will be placed in the different tools in the placing slot 106 inside, then the user pulls the door body 104, the door body 104 is taken off from the surface of the containing frame 105, and then pulls the containing box 32 inside the containing frame 105, so that the containing box 32 drives the guide slider 31 to slide in the containing frame 105, the tools are placed in the containing box 32, and the tools are separated under the action of the elastic force of the elastic device 332 on the surface of the partition plate 333, the clamping plate 331 is driven to move under the action of the elastic device 332, so that the elastic device 332 drives the clamping plate 331 to move to contact with the surface of the tool, and the tool is clamped and fixed in the containing box 32 under the joint action of the elastic device 332 and the clamping plate 331, to avoid the phenomenon that the tools collide with each other in the containing box 32, so as to realize the function of the tool carrying device for classifying and storing the tools, so that the tool carrying device can classify and store the tools in the containing frame 105 when used, and the tool carrying device is more convenient to take the tools.

[0033] Subsequently, when the user needs to adjust the position of the containing frame 105, the user unscrews the screws on the surface of the first arc block 102, and then pulls the containing frame 105, so that the containing frame 105 drives the first arc block 102 and the second arc block 103 to move up and down on the surface of the fixed frame 101, at this time, the first arc block 102 and the second arc block 103 drive the fixed block 42 to slide in the fixed slot 41, and the first arc block 102 and the second arc block 103 are guided under the joint action of the fixed slot 41 and the fixed block 42, at this time, the arc-shaped clamping piece 432 is driven to move under the elastic force of the extension spring 433, so that the extension spring 433 drives the arc-shaped clamping piece 432 to be clamped into the corresponding arc-shaped clamping slot 431, and the position of the first arc block 102 and the second arc block 103 is adjusted under the clamping action of the arc-shaped clamping piece 432 and the arc-shaped clamping slot 431, then the user tightens the screws on the surface of the first arc block 102, so as to fix the containing frame 105 on the surface of the fixed frame 101, so as to adjust the height position of the containing frame 105, so as to realize the function of the tool carrying device for adjusting the position of the containing frame 105, so that the tool carrying device can adjust the position of the containing frame 105 according to the use needs when used, so that the position of the containing frame 105 is more convenient for the user to take the tools, so that the tool carrying device is more convenient to use, and finally completes the use of the tool carrying device.

[0034] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A tool carrying device for PLC repair, comprising a device frame body (1), characterized in that: The surface of the top position of the device frame body (1) is provided with a fixing frame (101), the surface of the fixing frame (101) is provided with a first arc block (102), the surface of the fixing frame (101) is provided with a second arc block (103), the first arc block (102) is fastened with the surface of the second arc block (103) through screws, one side of the fixing frame (101) is provided with a containing frame (105), the surface of the containing frame (105) is fixed with the surface of the second arc block (103), the surface of the containing frame (105) is provided with a door body (104), the door body (104) and the containing frame (105) are detachably connected, the surface of the containing frame (105) is provided with a placing groove (106) for containing articles, the surface of the device frame body (1) is provided with a stable anti-walking mechanism (2), the stable anti-walking mechanism (2) comprises a push-pull rod (21), a stable suction cup (22), a fixing clamp (23), a compression spring (24), a sliding plate (25) and a guide groove (26), the inside of the containing frame (105) is provided with a classified storage mechanism (3), the inside of the classified storage mechanism (3) comprises a guide sliding block (31), a containing box (32) and a classified storage group (33), the inner wall of the first arc block (102), the second arc block (103) and the fixing frame (101) is provided with a position adjusting mechanism (4), the inside of the position adjusting mechanism (4) comprises a fixing groove (41), a fixing block (42) and a position adjusting assembly (43).

2. The tool carrier device for PLC maintenance according to claim 1, characterized in that: The surface of the device frame body (1) is provided with a push-pull rod (21), one end of the push-pull rod (21) penetrates through the device frame body (1) and extends below the device frame body (1), the surface of the push-pull rod (21) is provided with a sliding plate (25), the inner wall of the device frame body (1) is provided with a guide groove (26), the surface of the guide groove (26) and the sliding plate (25) are slidably connected, the surface of the sliding plate (25) is provided with a fixing clamp (23), the fixing clamp (23) and the inner wall of the device frame body (1) are detachably connected.

3. The tool carrier device for PLC maintenance according to claim 1, characterized in that: The inner wall of the device frame body (1) is provided with a compression spring (24), one end of the compression spring (24) is fixed with the surface of the sliding plate (25), the push-pull rod (21) and the inner wall of the device frame body (1) are slidably connected, the surface of the bottom position of the push-pull rod (21) is provided with a stable suction cup (22) for preventing walking.

4. The tool carrier device for PLC maintenance according to claim 1, characterized in that: The classified storage group (33) is arranged in the containing frame (105), the classified storage group (33) comprises a clamping plate (331), an elastic device (332) and a partition plate (333), the inside of the containing frame (105) is provided with a containing box (32) for containing articles, the surface of the containing box (32) is provided with a guide sliding block (31), the guide sliding block (31) and the inner wall of the containing frame (105) are slidably connected.

5. The tool carrier device for PLC maintenance according to claim 4, characterized in that: The inside of the containing box (32) is provided with a partition plate (333) for separating tools, both sides of the partition plate (333) are provided with a clamping plate (331) for clamping tools to prevent shaking, and the surface of both sides of the partition plate (333) is provided with an equal-interval elastic device (332), one end of the elastic device (332) is fixed to the surface of the clamping plate (331).

6. The tool carrier device for PLC maintenance according to claim 1, characterized in that: The position adjusting assembly (43) is arranged on the inner wall of the first arc block (102), the second arc block (103) and the fixing frame (101), the position adjusting assembly (43) is composed of an arc clamping groove (431), an arc clamping piece (432) and an extension spring (433), the inner wall of the first arc block (102) and the second arc block (103) is provided with a fixing block (42), the surface of the fixing frame (101) is provided with a fixing groove (41), and the surface of the fixing groove (41) and the fixing block (42) are slidably connected.

7. The tool carrier device for PLC maintenance according to claim 6, characterized in that: The surface of the fixing block (42) is provided with an arc clamping piece (432), the arc clamping piece (432) and the inner wall of the fixing block (42) are slidably connected, and the surface of the fixing frame (101) is provided with an equal-interval arc clamping groove (431).

8. The tool carrier device for PLC maintenance according to claim 7, characterized in that: The surface of the arc clamping groove (431) and the arc clamping piece (432) are connected, the surface of the arc clamping piece (432) is provided with an extension spring (433), and one end of the extension spring (433) is fixed to the inner wall of the fixing block (42).

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