Anti-slip suspension clamp

Abstract

The invention discloses an anti-slip suspension clamp, and relates to the technical field of suspension clamps, the anti-slip suspension clamp comprises a telegraph pole used for clamping a cable, the telegraph pole fixes the cable on a base, the cable is prevented from deviating on the base, a clamping assembly is provided with a locking assembly for locking the cable, and the locking assembly is provided with a locking assembly for locking the cable. When the cable moves on the base, the locking assembly is triggered to work, the locking assembly rapidly locks the cable, and the cable is fixed to the base, the anti-skid device further comprises an anti-skid assembly fixed to the telegraph pole, the anti-skid assembly is fixed to the telegraph pole, the clamping assembly is fixed to the anti-skid assembly, the anti-skid assembly is provided with a first locking plate and an insertion plate, and the insertion plate is inserted into the anti-skid assembly. When the anti-skid assembly slides on the telegraph pole, the first locking plate and the inserting plate are triggered, fixation between the anti-skid assembly and the telegraph pole is enhanced, the stability of the anti-skid assembly is improved, and anti-skid of the suspension clamp and the cable can be achieved without arranging an additional driving source.

Description

Technical Field

[0001] The present invention relates to the technical field of suspension wire clamps, and in particular to an anti-slip suspension wire clamp. Background Art

[0002] Suspension clamps are electrical devices used in power transmission lines. Their main function is to fix overhead transmission lines to poles or towers, allowing the wires to hang vertically without being subjected to excessive mechanical stress. At the same time, they allow the wires to move freely within a certain range to cope with vibrations and swings caused by environmental conditions such as temperature changes or wind.

[0003] Suspension clamps need to provide sufficient clamping force to secure cables or ropes. If the clamping force is insufficient, especially when the load changes, the clamp may not be able to hold the cable firmly, causing it to slip. Over time, the material of the suspension clamp may wear, age, or become damaged, resulting in a reduction in its clamping capacity. This can make the clamp more likely to slip when under load. Adding an anti-slip feature to the suspension clamp ensures that the conductor is firmly fixed in the suspension clamp, reducing the risk of conductors falling due to slipping and reducing the risk of accidents. In adverse weather conditions such as strong winds, the anti-slip feature can effectively resist the shaking of the conductor and prevent the line from breaking or falling off.

[0004] Chinese invention patent publication number CN106549352A discloses an anti-slip suspension wire clamp. This device improves the wire clamp body by providing multiple sets of transverse serrations on the middle arc section of the bottom surface of the body to increase the support force of the suspension wire clamp on the wire, thereby achieving anti-slip effect on the wire. First, this device has a poor anti-slip effect on the wire, and at the same time, it cannot quickly notify maintenance personnel to stop when the wire slides. Second, when the suspension wire clamp is installed on the wire pole, it cannot be guaranteed that the suspension wire clamp will not slide down the wire pole. Summary of the Invention

[0005] In response to the above technical problems, the present invention discloses an anti-slip suspension wire clamp.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: an anti-slip suspension wire clamp, including a telephone pole, a detachable anti-slip component on the telephone pole, the anti-slip component including a locking ring 1 and a locking ring 2, the locking ring 1 and the locking ring 2 are connected and fixed to the telephone pole by a nut 3, a swing rod and a trigger mechanism are provided on the locking ring 2, a plug plate is provided on the swing rod, the trigger mechanism controls the swing rod to rotate on the locking ring 2, the swing rod is provided with a plug plate, the plug plate is pressed on the telephone pole, the locking ring 1 is provided with a pressing mechanism and a locking plate 1, the pressing mechanism drives the locking plate 1 to press on the telephone pole, and the anti-slip is avoided by pressing the plug plate and the locking plate 1. The sliding assembly slides on the electric pole, and a clamping assembly is provided on the locking ring. The clamping assembly includes a base, a mounting rod and a connecting rod are provided on the base, and the clamping assembly is connected to the anti-slip assembly through the connecting rod. A cable and a locking assembly are provided on the base. When the cable slides on the base, the locking assembly presses the cable onto the base. The locking assembly includes two sets of mounting frames and support rings. The mounting frame is detachably mounted on the mounting rod, and a locking mechanism is provided on the mounting frame. The support ring is mounted on the cable, and the support ring is connected to the locking mechanism through a connecting column. The locking mechanism locks the cable to the base, and alarms are provided on both the locking assembly and the anti-slip assembly.

[0007] Furthermore, a pressing plate three is provided on the nut three, a spring four is provided between the nut three and the pressing plate three, and the pressing plate three is always in contact with the locking ring two.

[0008] Furthermore, the trigger mechanism includes a limit frame slidably mounted on the locking ring 2, a locking plate 2 is slidably set on the limit frame, the locking plate 2 is tightly attached to the electric pole, a limit column 2 is set on the swing rod, and the swing rod cannot rotate when the limit column 2 is inserted into the limit frame, and a torsion spring is set at the rotation position of the swing rod and the locking ring 2.

[0009] Furthermore, the pressing mechanism includes a contact wheel rotatably mounted on a locking ring, a toggle lever is provided on the contact wheel, the contact wheel is always in contact with the electric pole, a locking frame is provided on the locking ring, an air intake chamber, an air intake airbag and a locking plate are provided in the locking frame, when the air intake airbag is pressed, the air intake chamber is inflated, and after the air intake chamber is inflated, the locking plate is pushed to press on the electric pole.

[0010] Furthermore, a pressing block is slidably provided in the locking frame, a spring five is provided between the pressing block and the locking frame, the pressing block presses the air intake airbag, and the toggle rod pushes the pressing block to slide.

[0011] Furthermore, one-way valves are provided at both upper and lower ends of the air inlet airbag.

[0012] Furthermore, the locking mechanism includes a locking rod slidably mounted on the mounting frame, a second spring is provided between the locking rod and the mounting frame, a locking column is slidably provided on the mounting frame, the locking column fixes the locking rod, a third spring is provided between the locking column and the mounting frame, and the locking rod locks the cable.

[0013] Furthermore, a mounting plate is provided on the mounting frame, and a limiting column 1 is slidably provided on the mounting plate, and the limiting column blocks a pair of locking columns. A connecting groove is provided on the limiting column 1, and the connecting column is connected to the connecting groove. When the connecting column moves, it pushes the limiting column 1 to move, and the limiting column 1 releases the blocking of the locking column, and the locking column releases the fixation of the locking rod.

[0014] The beneficial effects of the present invention compared with the prior art are as follows: the locking assembly provided in the present invention provides anti-slip protection for the cable, automatically fixes the cable on the clamping assembly, and prevents the cable from sliding on the base, causing the cable to fall off. The anti-slip assembly provided in the present invention is installed on the utility pole. At the same time, the locking plate and the plug plate provided on the anti-slip assembly are quickly fixed to the utility pole when the anti-slip assembly slides, and the anti-slip assembly is firmly fixed on the utility pole, preventing the anti-slip assembly from continuing to slide and causing the cable to fall, causing danger. At the same time, the locking assembly and the anti-slip assembly provided in the present invention are both provided with alarms for maintenance personnel to quickly carry out maintenance. The anti-slip functional mechanisms provided on the locking assembly and the anti-slip assembly are both completed by mechanical power, and there is no need to set up an additional driving source, which reduces manufacturing costs and maintenance cycles, and improves the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the overall structure of the present invention.

[0016] Figure 2 for Figure 1 Structural cross-section view in the AA direction.

[0017] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 4 It is a schematic diagram of the structure of the clamping assembly of the present invention.

[0019] Figure 5 for Figure 4 Structural cross-section view in the middle BB direction.

[0020] Figure 6 It is a schematic diagram of the local structure of the clamping assembly of the present invention.

[0021] Figure 7It is a schematic structural diagram of the locking assembly of the present invention.

[0022] Figure 8 This is a front view of the locking assembly structure of the present invention.

[0023] Figure 9 for Figure 8 Structural cross-section view in the CC direction.

[0024] Figure 10 It is a schematic diagram of the partial structure of the locking assembly of the present invention.

[0025] Figure 11 This is a left view of the anti-slip assembly structure of the present invention.

[0026] Figure 12 Schematic diagram of the local structure of the anti-slip component of the present invention Figure 1 .

[0027] Figure 13 Schematic diagram of the local structure of the anti-slip component of the present invention Figure 2 .

[0028] Figure numerals: 1-telephone pole; 2-clamping assembly; 3-locking assembly; 4-anti-slip assembly; 201-base; 202-cable; 203-mounting rod; 204-U-shaped ring; 205-nut 1; 206-pressing plate 1; 207-spring 1; 208-connecting rod; 209-pressing plate 2; 210-nut 2; 211-limiting block; 212-bolt; 301-support ring; 302-mounting frame; 303-locking hole; 304-pressing rod; 305-locking rod; 306-spring 2; 307-positioning column; 308-limiting column 1; 309-locking Column; 310-spring three; 311-mounting plate; 312-connecting groove; 313-connecting column; 401-locking ring one; 402-locking frame; 403-locking ring two; 404-nut three; 405-spring four; 406-pressing plate three; 407-swing rod; 408-limiting frame; 409-intake chamber; 410-locking pin; 411-intake airbag; 412-contact wheel; 413-toggle rod; 414-pressing block; 415-spring five; 416-locking plate one; 417-connecting shaft; 418-insertion plate; 419-locking plate two; 420-nut four. DETAILED DESCRIPTION

[0029] refer to Figures 1 to 13The anti-slip suspension wire clamp shown includes an anti-slip component 4 fixed on the utility pole 1, and a locking plate 416 and an inserting plate 418 are provided on the anti-slip component 4. When the anti-slip component 4 slides on the utility pole 1, the locking plate 416 and the inserting plate 418 move quickly to fix the anti-slip component 4 on the utility pole 1 to prevent the anti-slip component 4 from sliding on the utility pole 1. The anti-slip component 4 is provided with a clamping component 2 for placing the cable 202, and the clamping component 2 is provided with a locking component 3 for fixing the cable 202. When the cable 202 slides on the base 201, the cable 202 is quickly fixed to prevent the cable 202 from sliding on the base 201 and falling off.

[0030] The clamping assembly 2 includes a base 201, both ends of the base 201 are provided with mounting rods 203, the mounting rods 203 are provided with limit blocks 211, the base 201 is placed with a cable 202, the base 201 is detachably provided with two sets of U-shaped rings 204, the U-shaped rings 204 are fixed to the base 201 by nuts 210, and the lower end of the anti-slip assembly 4 of the base 201 is provided with a pressing plate 209. When the nuts 210 are tightened, the U-shaped rings 204 drive the pressing plate 209 to press the cable 202. Press the cable 202 onto the base 201. A bolt 212 is provided on the base 201. The bolt 212 is fixed to the base 201 through a nut 205. Two sets of pressing plates 206 are also provided on the base 201. A spring 207 is provided between the pressing plate 206 and the base 201. The spring 207 fits with the connecting rod 208 to prevent the connecting rod 208 from sliding on the bolt 212. The connecting rod 208 is installed on the bolt 212, and the connecting rod 208 is connected to the connecting shaft 417.

[0031] The locking assembly 3 includes two sets of mounting brackets 302, each of which is provided with a locking hole 303. When the mounting bracket 302 is mounted on the mounting rod 203, the locking hole 303 is aligned with the limit block 211, and then the limit block 211 is fixed to the locking hole 303 by screws to complete the installation of the mounting bracket 302. A set of locking rods 305 are slidably provided at both ends of the mounting bracket 302, and a spring 2 306 is provided between the locking rod 305 and the mounting bracket 302. A locking column 309 is slidably provided on the side of the mounting bracket 302, and a spring is provided between the locking column 309 and the mounting bracket 302. The third 310, the locking column 309 is inserted into the locking rod 305 to fix the locking rod 305. When the locking column 309 is pulled out of the locking rod 305, the locking rod 305 moves due to the deformation recovery force of the spring 2 306. The two sets of locking rods 305 are close to each other to clamp the cable 202 to prevent the cable 202 from sliding. A mounting plate 311 is provided on the side of the mounting frame 302. A limiting column 308 is slidably provided on the mounting plate 311. A connecting groove 312 is provided on the limiting column 308. The limiting column 308 blocks the locking column 309 to prevent the locking column 309 from sliding. The locking rod 305 is pulled out, and the locking assembly 3 also includes a support ring 301. A notch is provided on the side of the support ring 301. A pressing rod 304 and a positioning column 307 are slidingly provided in the support ring 301. The pressing rod 304 presses the positioning column 307, and the positioning column 307 presses the cable 202. Pressing the pressing rod 304 causes the pressing rod 304 to drive the positioning column 307 to press on the cable 202. After fixing the pressing rod 304, the cable 202 is clamped. At this time, the support ring 301 is installed on the cable 202, and the cable 202 drives the support ring 301 when sliding on the base 201. 01 moves synchronously, a connecting column 313 is also provided on the support ring 301, and the connecting column 313 is inserted into the connecting groove 312. When the support ring 301 moves, the support ring 301 drives the connecting column 313 to move, and the connecting column 313 drives the limiting column 308 to slide on the mounting plate 311. When the limiting column 308 slides, the limit on the locking column 309 is released. After the locking column 309 is reset, the locking rod 305 clamps the cable 202, and an alarm is also provided on the locking assembly 3. The locking rod 305 fixes the cable 202 and sounds an alarm to remind the maintenance personnel to repair it as soon as possible.

[0032] The anti-slip assembly 4 includes a locking ring 1 401 and a locking ring 2 403. The locking ring 1 401 and the locking ring 2 403 are installed on the electric pole 1 and tightened by the nut 3 404 to achieve fixation. A pressing plate 3 406 is provided on the nut 3 404. A spring 405 is provided between the pressing plate 3 406 and the nut 3 404. When the nut 3 404 is tightened, the pressing plate 3 406 is always in close contact with the locking ring 2 403 to prevent the nut 3 404 from loosening. A connecting shaft 417 and a locking frame 402 are provided on the locking ring 1 401. An air inlet cavity 409 is provided inside the locking frame 402. A locking plate 1 is slidably provided on the locking frame 402. 416, the locking plate 1 416 is communicated with the air inlet chamber 409, and the locking frame 402 is also provided with an air inlet airbag 411, which is communicated with the air inlet chamber 409. When the air inlet airbag 411 is pressed, the air inlet chamber 409 is inflated, and the locking plate 1 416 is pressed and moved by the gas, and the locking plate 1 416 is pressed against the electric pole 1 to increase the pressure to prevent the anti-skid component 4 from sliding down. A contact wheel 412 is rotatably provided on the locking ring 1 401, and a plurality of groups of toggle rods 413 are provided in the contact wheel 412. The contact wheel 412 is in contact with the electric pole 1, and a pressing block 414 is slidingly provided in the locking frame 402, and the pressing block 414 is in contact with the lock A spring 5 415 is provided between the fixed frame 402, and the toggle rod 413 and the pressing block 414 are intermittently fitted. When the anti-slip component 4 descends, the contact wheel 412 is fitted with the electric pole 1, and the contact wheel 412 rotates at this time, and the contact wheel 412 drives the toggle rod 413 to rotate, and the toggle rod 413 drives the pressing block 414 to slide back and forth, and the pressing block 414 presses the air intake bag 411 to achieve inflation of the air intake chamber 409. Both ends of the air intake bag 411 are provided with a one-way valve to prevent air leakage in the air intake chamber 409. A swing rod 407 is rotatably provided on the locking ring 2 403, and the rotation axis position of the swing rod 407 is provided with a Torsion spring, a plug plate 418 is provided on the swing rod 407, a limiting column 2 is provided on the swing rod 407, a limiting frame 408 is slidably provided on the locking ring 2 403, the lower end of the limiting frame 408 is intermittently connected to the limiting column 2, and the swing rod 407 cannot rotate when the limiting column 2 is inserted in the limiting frame 408, and a locking plate 2 419 is slidably provided on the upper end of the limiting frame 408, and the locking plate 2 419 and the limiting frame 408 are fixed by a nut 420, and the locking plate 2 419 is always in close contact with the electric pole 1, and an alarm is also provided on the anti-slip component 4, and an alarm is sounded when the locking plate 1 416 and the plug plate 418 work, reminding the maintenance personnel to repair as soon as possible.

[0033] Working principle: When working, install the locking ring 1 401 and the locking frame 402 on the electric pole 1, and tighten the nut 3 404 to make the pressing plate 3 406 and the locking ring 2 403 close together. In the initial state, the limiting column 2 on the swing rod 407 is inserted into the limiting frame 408, and the torsion spring in the swing rod 407 is in a compressed state. Screw the nut 420 to make the locking plate 2 419 close to the electric pole 1. At this time, the installation of the anti-slip component 4 is completed, and the connecting rod 208 is installed on the connecting shaft 417. Fix the base 201 to the connecting rod 208 by means of bolts 212 and nuts 205. At this time, the pressing plate 1 206 fixes the connecting rod 208 by means of the force of spring 1 207 to prevent the connecting rod 208 from moving on the bolts 212. Pass the cable 202 through the base 201 and the pressing plate 2 209. Then, insert the two sets of U-shaped rings 204 into the base 201 and tighten the nuts 210 to fix the cable 202 on the base 201. This completes the installation of the clamping assembly 2.

[0034] When the locking assembly 3 is installed on the clamping assembly 2, the mounting bracket 302 is installed on the mounting rod 203 so that the locking hole 303 is aligned with the limit block 211, and the limit block 211 is fixed to the locking hole 303 by screws to complete the installation of the mounting bracket 302. In the initial state, the locking column 309 is inserted into the locking rod 305, and the limit column 1 308 blocks the locking column 309. After the support ring 301 is put on the cable 202, the sliding support ring 301 moves on the cable 202, and the support ring 301 drives the connecting column 313 to be inserted into the connecting groove 312. After fixing the connecting column 313, the pressing rod 304 is pushed to move, and the pressing rod 304 drives the positioning column 307 to fit with the base 201. After fixing the pressing rod 304, the two sets of positioning columns 307 complete the clamping of the cable 202, complete the fixation of the support ring 301, and at the same time complete the connection between the connecting column 313 and the connecting groove 312.

[0035] When the anti-skid assembly 4 slides and falls on the electric pole 1, the locking ring 2 403 and the locking ring 1 401 fall down at the same time. Since the locking plate 2 419 is in close contact with the electric pole 1, and the limit frame 408 is in sliding connection with the locking ring 2 403, the locking plate 2 419 drives the limit frame 408 to prevent it from falling. At this time, the locking ring 2 403 drives the swing rod 407 to fall down, and the limit column 2 of the swing rod 407 is disconnected from the limit frame 408. The torsion spring set on the swing rod 407 resets and drives the swing rod 407 to rotate. The swing rod 407 drives the plug plate 418 to press quickly on the electric pole 1, increasing the resistance of the anti-skid assembly 4 to fall. When the locking ring 1 40 When the utility pole 1 is lowered, the locking ring 401 drives the contact wheel 412 to descend. Since the contact wheel 412 is in contact with the utility pole 1, the contact wheel 412 rotates at this time, and the contact wheel 412 drives the toggle rod 413 to rotate. The toggle rod 413 contacts the pressing block 414 and pushes the pressing block 414 to slide back and forth on the locking frame 402. The pressing block 414 presses the air intake bag 411, and the air intake bag 411 inflates the air intake chamber 409. The air intake chamber 409 pushes the locking plate 416 to move. The locking plate 416 is in close contact with the utility pole 1, completing the fixation of the anti-skid component 4 and preventing the anti-skid component 4 from sliding down. At the same time, an alarm is sounded through the alarm to enable maintenance personnel to carry out maintenance.

[0036] When the cable 202 slides and deviates on the base 201, the cable 202 drives the support ring 301 to move, the support ring 301 drives the connecting column 313 to move, and the connecting column 313 drives the limiting column 1 308 to slide on the mounting plate 311. The limiting column 1 308 releases the blocking of the locking column 309. At this time, the locking column 309 pops out from the locking rod 305, and the two sets of locking rods 305 approach each other to clamp the cable 202. Since the mounting frame 302 is fixed to the base 201, the mounting frame 302 also fixes the cable 202, thereby achieving the stability of the cable 202 and preventing the cable 202 from sliding. While the locking rod 305 clamps, an alarm is sounded through the alarm of the locking assembly 3.

[0037] The present invention is not limited to the above-mentioned specific implementation methods. Various changes made by technicians in the relevant technical field based on the above-mentioned conception without creative work are all within the scope of protection of the present invention.

Claims

1. An anti-slip suspension wire clamp, comprising a utility pole (1), wherein the utility pole (1) is detachably provided with an anti-slip component (4), characterized in that: The anti-slip assembly (4) includes a locking ring 1 (401) and a locking ring 2 (403), wherein the locking ring 1 (401) and the locking ring 2 (403) are connected and fixed to the electric pole (1) through a nut 3 (404), and a swing rod (407) and a trigger mechanism are provided on the locking ring 2 (403), and a plug plate (418) is provided on the swing rod (407), and the trigger mechanism controls the swing rod (407) to rotate on the locking ring 2 (403). 07) is provided with an inserting plate (418), the inserting plate (418) is pressed on the electric pole (1), the locking ring (401) is provided with a pressing mechanism and a locking plate (416), the pressing mechanism drives the locking plate (416) to press on the electric pole (1), and the anti-slip component (4) is prevented from sliding on the electric pole (1) by pressing the inserting plate (418) and the locking plate (416). The locking ring (401) is provided with a clamping component (2), the clamping component (2) includes a base (201), the base (201) is provided with a mounting rod (203) and a connecting rod (208), the clamping assembly (2) is connected to the anti-slip assembly (4) via the connecting rod (208), the base (201) is provided with a cable (202) and a locking assembly (3), when the cable (202) slides on the base (201), the locking assembly (3) presses the cable (202) on the base (201), and the locking assembly (3) includes two sets of mounting rods (203) and connecting rods (208). A mounting frame (302) and a support ring (301), wherein the mounting frame (302) is detachably mounted on the mounting rod (203), a locking mechanism is provided on the mounting frame (302), the support ring (301) is mounted on the cable (202), the support ring (301) is connected to the locking mechanism via a connecting column (313), the locking mechanism locks the cable (202) on the base (201), and an alarm is provided on both the locking component (3) and the anti-slip component (4).

2. The anti-slip suspension wire clamp according to claim 1, characterized in that: A pressing plate three (406) is provided on the nut three (404), a spring four (405) is provided between the nut three (404) and the pressing plate three (406), and the pressing plate three (406) is always in contact with the locking ring two (403).

3. The anti-slip suspension wire clamp according to claim 2, characterized in that: The trigger mechanism includes a limit frame (408) slidably mounted on a second locking ring (403), a second locking plate (419) slidably arranged on the limit frame (408), the second locking plate (419) is in close contact with the electric pole (1), a second limit column is arranged on the swing rod (407), the swing rod (407) cannot rotate when the second limit column is inserted into the limit frame (408), and a torsion spring is arranged at the rotation position of the swing rod (407) and the second locking ring (403).

4. The anti-slip suspension wire clamp according to claim 3, characterized in that: The pressing mechanism includes a contact wheel (412) rotatably mounted on a locking ring (401), a toggle rod (413) being provided on the contact wheel (412), the contact wheel (412) always being in contact with the electric pole (1), a locking frame (402) being provided on the locking ring (401), an air intake chamber (409), an air intake airbag (411) and a locking plate (416) being provided in the locking frame (402), the air intake airbag (411) inflating the air intake chamber (409) when pressed, and after the air intake chamber (409) is inflated, pushing the locking plate (416) to press on the electric pole (1).

5. The anti-slip suspension clamp according to claim 4, characterized in that: A pressing block (414) is slidably provided in the locking frame (402), a spring (415) is provided between the pressing block (414) and the locking frame (402), the pressing block (414) presses the air intake airbag (411), and the toggle rod (413) pushes the pressing block (414) to slide.

6. The anti-slip suspension clamp according to claim 5, characterized in that: One-way valves are provided at both the upper and lower ends of the air inlet bag (411).

7. The anti-slip suspension clamp according to claim 1, characterized in that: The locking mechanism includes a locking rod (305) slidably mounted on the mounting frame (302), a second spring (306) being provided between the locking rod (305) and the mounting frame (302), a locking column (309) being slidably provided on the mounting frame (302), the locking column (309) fixing the locking rod (305), a third spring (310) being provided between the locking column (309) and the mounting frame (302), and the locking rod (305) locking the cable (202).

8. The anti-slip suspension wire clamp according to claim 7, characterized in that: The mounting frame (302) is provided with a mounting plate (311), and a limiting column (308) is slidably provided on the mounting plate (311), and the limiting column (308) blocks the locking column (309). The limiting column (308) is provided with a connecting groove (312), and the connecting column (313) is connected to the connecting groove (312). When the connecting column (313) moves, it pushes the limiting column (308) to move, and the limiting column (308) releases the blocking of the locking column (309), and the locking column (309) releases the fixation of the locking rod (305).

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