Climbing assisting device for electric power transmission line tower

Abstract

The invention discloses a climbing assisting device for a power transmission line tower, which comprises a climber, the climber is connected with an elastic power assisting mechanism, the elastic power assisting mechanism is connected with a seat frame, the elastic power assisting mechanism is symmetrically arranged on two sides of the seat frame, the elastic power assisting mechanism comprises a guide rod, one end of the guide rod is connected with the seat frame, and the other end of the guide rod is connected with the seat frame. The guide rod is provided with a limiting block and sleeved with a spring, one end of the spring is indirectly connected with the seat frame through the guide rod, and the other end of the spring is connected with the climber through a connecting mechanism. According to the invention, the elastic power-assisted mechanism is arranged, and the elastic characteristic of the spring is utilized to provide assistance for climbing. When a worker presses the seat frame downwards, the spring is compressed to store elastic potential energy, and after the downward pressing action is released, the spring recovers to the original shape to generate upward elastic force, and the upward elastic force is accurately transmitted to the climber through the connecting mechanism to drive the climber to move upwards. Through such cyclic operation, the worker can easily lift the climber to climb by virtue of the assistance, so that the physical output in the process of climbing the tower is effectively reduced, and the climbing efficiency is improved.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of electric power maintenance equipment, and in particular to a climbing assistance device for a power transmission line tower. Background Art

[0002] In the power transmission system, power poles are used to support the transmission lines. With the development of electricity, the power transmission flow has increased and the transmission voltage has been greatly improved, so the existing power poles are getting higher and higher, and the staff often need to climb the power poles to install, maintain, and inspect the equipment.

[0003] At present, although the existing climbing assistance equipment can help workers complete climbing tasks to a certain extent, it still has some shortcomings. For example, some equipment relies on pure manpower climbing, which consumes a lot of physical energy and has low work efficiency; some devices that use electric or hydraulic assistance have complex structures and high costs, and may have problems such as insufficient reliability and difficult maintenance in complex outdoor environments. Therefore, it is necessary to develop a device with a relatively simple structure, low cost and can effectively provide assistance for climbing to meet industry needs. Summary of the invention

[0004] The present invention mainly provides a climbing aid device for a power transmission line tower, which is used to solve the technical problems raised in the above-mentioned background technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A climbing aid device for a power transmission line tower, comprising a foot buckle, the foot buckle is connected to an elastic power-assisting mechanism, and the elastic power-assisting mechanism is connected to a seat frame;

[0007] The elastic power-assisting mechanism is symmetrically arranged on both sides of the seat frame, and the elastic power-assisting mechanism includes a guide rod, one end of which is connected to the seat frame, a limit block is provided on the guide rod, and a spring is sleeved on the guide rod, one end of the spring is indirectly connected to the seat frame through the guide rod, and the other end is connected to the foot buckle through a connecting mechanism.

[0008] Furthermore, the connecting mechanism includes a connecting block and a connecting groove, the connecting block is provided with a thread connected to an end of the spring away from the seat frame, the connecting groove is arranged on the outside of the foot buckle and is provided with a thread matching the connecting block.

[0009] Furthermore, the guide rod is a smooth cylinder, the length of the guide rod is greater than the free length of the spring, and the diameter of the guide rod is greater than the inner diameter of the spring. In addition, one end of the guide rod connected to the seat frame is provided with a thread.

[0010] Furthermore, the limiting block is located on a side of the guide rod away from the seat frame and its size is larger than the diameter of the guide rod.

[0011] Furthermore, the front portion of the seat frame is provided with an annular opening, the annular opening is provided with a clamping assembly, the top of the seat frame is provided with a folding backrest, the side wall of the seat frame is provided with a mounting hole and a safety buckle connection point, and the bottom of the seat frame is also provided with a support pad, and the mounting hole is detachably connected to one end of the guide rod.

[0012] Furthermore, a nut matching one end of the guide rod is provided in the mounting hole, and the nut can move up and down in the mounting hole.

[0013] Furthermore, the support pad is made of wear-resistant rubber and has an arc shape that matches the surface of the electric pole tower.

[0014] Furthermore, the foot buckle includes a buckle body, the buckle body is installed on the foot pedal, and the connecting groove of the connecting mechanism is arranged on the foot pedal.

[0015] Furthermore, an adjustment component is provided on the buckle body, and an anti-slip rubber pad is provided on the inner side of the buckle body.

[0016] Furthermore, the upper surface of the foot pedal is provided with anti-slip grooves, and a locking component is also arranged thereon.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] First, the present invention provides assistance for climbing by setting up an elastic assist mechanism and utilizing the elastic characteristics of the spring. When the worker presses down on the seat frame, the spring is compressed to store elastic potential energy. After releasing the downward pressure, the spring returns to its original state to generate an upward elastic force, which is accurately transmitted to the foot buckle through the connecting mechanism, driving the foot buckle to move upward. In this cyclic operation, the worker can lift the foot buckle more easily to climb with the help of this assist, effectively reducing the physical exertion in the process of climbing the pole tower and improving the climbing efficiency.

[0019] Secondly, the foot buckle provided in the present invention is provided with an anti-skid rubber pad inside the buckle body, which is made of a rubber material with a high friction coefficient, can fit tightly to the surface of the pole tower, and effectively prevent the foot buckle from sliding on the pole tower. The upper surface of the foot pedal is provided with anti-skid patterns, which increase the friction between the staff's feet and the foot pedal and prevent the feet from sliding on the foot pedal. These two layers of anti-skid measures ensure the stability of the staff during the climbing process from different angles and reduce the risk of accidents caused by sliding. The foot pedal is also provided with a locking assembly, which adopts a snap-on locking method, which is simple to operate, firmly locked, and easy to unlock. After the staff places their feet on the foot pedal and adjusts the position, they can fix their feet by operating the locking assembly to prevent the feet from accidentally slipping during the climbing process, thereby further enhancing safety.

[0020] Third, the side wall of the seat frame is equipped with a safety buckle connection point, where the staff can connect the safety belt they wear when climbing. Even if an unexpected situation occurs during the climbing process, causing the body to lose balance or the seat frame, foot buckle and other parts to malfunction, the safety belt can fix the staff on the seat frame to prevent falling from a height, greatly improving the safety of the climbing operation. The support pad at the bottom of the seat frame is made of wear-resistant rubber, and its shape is adapted to the surface of the electric pole tower. It can not only enhance the contact stability between the seat frame and the electric pole and prevent the seat frame from sliding on the electric pole, but also maintain its own integrity and functionality during long-term friction, avoiding safety hazards caused by the sliding of the seat frame and other situations.

[0021] Fourthly, the seat frame and the guide rod provided in the present invention are detachably connected through the mounting hole and the nut, and this connection method provides a certain flexibility. When the device is installed, one end of the guide rod can be conveniently inserted into the mounting hole and then fastened with the nut; when it is necessary to repair, replace parts or store, the nut can be easily unscrewed and the guide rod can be taken out of the mounting hole. The operation is relatively convenient, which reduces the difficulty of installation, maintenance and storage of the device. The connecting mechanism realizes a firm connection with the foot buckle by inserting the connecting block into the connecting groove on the outside of the foot buckle and fixing it detachably with a thread. This connection method not only ensures that the spring force is accurately transmitted to the foot buckle, but also facilitates the inspection, repair or replacement of parts of the connecting mechanism when necessary.

[0022] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the foot buckle structure of the present invention;

[0025] Figure 3 It is a top view of the foot buckle structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the elastic assist mechanism of the present invention;

[0027] Figure 5 It is a schematic diagram of the seat frame structure of the present invention;

[0028] Figure 6 It is a schematic diagram of the front structure of the seat frame of the present invention;

[0029] Figure 7 for Figure 5 Enlarged view of point A in the middle;

[0030] Figure 8 It is a structural schematic diagram of the seat frame of the present invention with the backrest folded in the standing state.

[0031] Description of the drawings: 1. Foot buckle; 101. Buckle body; 102. Foot pedal; 103. Adjustment assembly; 104. Anti-skid rubber pad; 105. Anti-skid pattern; 106. Locking assembly; 2. Elastic power-assisting mechanism; 201. Guide rod; 202. Limit block; 203. Spring; 3. Seat frame; 301. Annular opening; 302. Clamping assembly; 303. Folding backrest; 304. Mounting hole; 305. Safety buckle connection point; 306. Support pad; 307. Nut; 4. Connecting mechanism; 401. Connecting block; 402. Connecting groove. DETAILED DESCRIPTION

[0032] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0033] Example

[0034] Please refer to the attached Figure 1 , 4 As shown, a climbing aid device for a power transmission line tower includes a foot buckle 1, the foot buckle 1 is connected to an elastic power-assisting mechanism 2, the elastic power-assisting mechanism 2 is connected to a seat frame 3, the elastic power-assisting mechanism 2 is symmetrically arranged on both sides of the seat frame 3, the elastic power-assisting mechanism 2 includes a guide rod 201, one end of the guide rod 201 is connected to the seat frame 3 and is provided with a thread, a limit block 202 is provided on the guide rod 201, and a spring 203 is sleeved on the guide rod 201, one end of the spring 203 is indirectly connected to the seat frame 3 through the guide rod 201, and the other end is connected to the foot buckle 1 through a connecting mechanism 4. The connecting mechanism 4 includes a connecting block 401 and a connecting groove 402, the connecting block 401 is provided with a thread, which is connected to the end of the spring 203 away from the seat frame 3, and the connecting groove 402 is provided on the outside of the foot buckle 1 and is provided with a thread matching the connecting block 401.

[0035] It should be noted that the guide rod 201 is an important component of the elastic booster mechanism 2, and plays a key role in providing guidance for the spring 203 and limiting its range of motion. The guide rod 201 is made of high-strength stainless steel, and its shape is cylindrical. The surface is finely processed and has a high degree of smoothness. The length of the guide rod 201 is greater than the free length of the spring 203, ensuring that the spring 203 can move within its effective range in both the fully extended and the maximum compressed state, and avoiding abnormal situations such as the spring 203 being derailed. Its diameter matches the inner diameter of the spring 203, so that the spring 203 can be tightly sleeved on it, and can provide accurate guidance for the spring 203 during the expansion and contraction process of the spring 203, ensuring that the spring 203 is orderly telescopic along the axial direction of the guide rod 201, and preventing irregular deformation such as lateral bending or twisting. One end of the guide rod 201 is symmetrically connected to the seat frame 3 through a threaded detachable thread to ensure that it will not loosen or shift during use, and the size of the limit block 202 set at the other end is greater than the diameter of the guide rod 201, which is used to prevent the spring 203 from being over-compressed.

[0036] It should be noted that the spring 203 is the core component of the elastic booster mechanism 2, and is responsible for the important task of storing and releasing elastic potential energy. It is made of high-strength alloy spring steel, such as 60Si2Mn (silicon manganese spring steel) and other materials, and has good elasticity and fatigue resistance. This material can maintain stable mechanical properties during repeated compression and rebound, ensuring that reliable assistance is provided for the foot buckle 1. One end of the spring 203 is indirectly connected to the seat frame 3 through the guide rod 201, specifically, it is sleeved on the guide rod 201, and a connection relationship is established with the seat frame 3 by means of the guide rod 201. When the staff member presses the seat frame 3, the displacement of the seat frame 3 will be transmitted to the spring 203 through the guide rod 201, so that the spring 203 is compressed. The other end of the spring 203 is connected to the foot buckle 1 through the connecting mechanism 4, so that when the spring 203 returns to its original state and generates an upward elastic force, the elastic force can be transmitted to the foot buckle 1, pushing the foot buckle 1 to move upward, providing assistance for the staff member's climbing.

[0037] It should be noted that the parameters of the spring 203, such as the wire diameter, outer diameter, and number of turns, are determined according to factors such as the actual required power assist amount and the overall size of the device. Specifically, the wire diameter will affect the strength and elasticity of the spring 203, the outer diameter determines the overall size of the spring 203 and the coordination relationship with other components, and the number of turns is closely related to the elastic potential energy that the spring 203 can store. By reasonably adjusting these parameters, it can be ensured that the spring 203 can provide sufficient power assist for climbing and ensure its own stability and reliability during the process of being compressed and restored to its original state.

[0038] It should be noted that the connecting mechanism 4 achieves a firm connection with the foot buckle 1 by inserting the connecting block 401 into the connecting groove 402 on the outside of the foot buckle 1 and can be detachably fixed with the aid of a thread, thereby ensuring that when the spring 203 restores its original state and generates an upward elastic force, it can accurately transmit the elastic force to the foot buckle 1, so that the foot buckle 1 can obtain an upward thrust, and then move upward with the help of the friction force with the telephone pole, thereby providing assistance for the staff to climb.

[0039] Please refer to the attached Figure 5 , 6 As shown in , 7 and 8, the front portion of the seat frame 3 is provided with an annular opening 301, the annular opening 301 is provided with a clamping assembly 302, the top of the seat frame 3 is provided with a folding backrest 303, the side wall of the seat frame 3 is provided with a mounting hole 304 and a safety buckle connection point 305, and the bottom of the seat frame 3 is also provided with a support pad 306.

[0040] It should be noted that the folding backrest 303 provided on the top of the seat frame 3 provides a certain degree of comfort and support for the staff during the climbing process. When the staff takes a break from climbing or needs a short rest, the folding backrest 303 can be unfolded for use. It allows the staff to lean on it to reduce physical fatigue, which is particularly important when performing climbing operations for a long time or at a high altitude. Moreover, the folding backrest 303 adopts a foldable design, which can be folded up when not in use to avoid obstruction to normal climbing operations, and also facilitates the storage and carrying of the entire climbing aid device.

[0041] It should be noted that the safety buckle connection point 305 provided on the side wall of the seat frame 3 is an important setting to ensure the safety of the staff. When the staff uses the climbing aid to climb, they will connect the safety belt they wear to the safety buckle connection point 305. In this way, during the climbing process, even if an unexpected situation occurs that causes the staff to lose balance or the seat frame 3, the foot buckle 1 and other components fail, the safety belt can still fix the staff on the seat frame 3 to prevent the staff from falling from a height, thereby greatly improving the safety of the climbing operation.

[0042] It should be noted that the support pad 306 provided at the bottom of the seat frame 3 mainly serves to enhance the contact stability between the seat frame 3 and the surface of the electric pole. The support pad 306 is made of wear-resistant rubber and has an arc shape that matches the surface of the electric pole tower so that it can better fit the surface of the electric pole and enhance the contact stability with the electric pole. The wear-resistant rubber material has good wear resistance and anti-slip properties, and can maintain its integrity and functionality during long-term contact and friction with the surface of the electric pole, and will not wear out too quickly or deform due to frequent friction.

[0043] It should be noted that the mounting hole 304 provided on the side wall of the seat frame 3 plays a key role in the structural connection of the entire climbing aid device. It is detachably connected to one end of the guide rod 201, and a nut 307 matching one end of the guide rod 201 is provided in the mounting hole 304, and the nut 307 can move up and down in the mounting hole 304. This detachable connection mode realized by the mounting hole 304 and the nut 307 provides a certain flexibility for the connection between the seat frame 3 and the guide rod 201. During the installation of the device, one end of the guide rod 201 can be conveniently inserted into the mounting hole 304, and then fastened by the nut 307 to ensure the firmness of the connection. When the device needs to be repaired, parts replaced or stored, the nut 307 can be easily unscrewed and the guide rod 201 can be taken out of the mounting hole 304, which is relatively convenient to operate.

[0044] It should be noted that the nut 307 can move up and down in the mounting hole 304, so that when the spring 203 exerts different degrees of force on the guide rod 201 during the extension and retraction process, the nut 307 can adaptively adjust its position in the mounting hole 304 within a certain range, thereby avoiding problems such as stress concentration that may be caused by rigid connection. This adaptive adjustment helps to maintain the stability of the entire connection structure, ensuring that the guide rod 201 can still play its guiding role on the spring 203 under the action of various forces, and also protects the mounting hole 304 and the surrounding structure from being damaged due to excessive stress.

[0045] Please refer to the attached Figure 1 , 2 As shown in , 3, the foot buckle 1 includes a buckle body 101, the buckle body 101 is installed on the foot pedal 102, the connecting groove 402 of the connecting mechanism 4 is arranged on the foot pedal 102, the buckle body 101 is provided with an adjustment component 103, the inner side of the buckle body 101 is provided with a non-slip rubber pad 104, the upper surface of the foot pedal 102 is provided with an anti-slip pattern 105, and a locking component 106 is also arranged thereon.

[0046] It should be noted that the adjustment component 103 can adjust the clamping force between the buckle body 101 and the pole tower by adjusting the opening and closing angle and the extension length of the buckle body 101, so that the foot buckle 1 can better adapt to pole towers with different outer diameters and different climbing environments.

[0047] It should be noted that the anti-skid rubber pad 104 provided on the inner side of the buckle body 101 is an important guarantee to ensure the stable attachment of the foot buckle 1 to the pole tower. The anti-skid rubber pad 104 is made of a rubber material with a high friction coefficient, which can fit tightly on the surface of the pole tower, greatly enhancing the friction between the foot buckle 1 and the pole tower. During the climbing process, no matter how the weight of the staff is distributed or how the climbing action changes, the anti-skid rubber pad 104 can effectively prevent the foot buckle 1 from sliding, thereby ensuring the safety of the staff and the continuity of the climbing action.

[0048] It should be noted that the anti-skid pattern 105 provided on the upper surface of the footrest 102 is mainly to increase the friction between the foot of the staff and the footrest 102. When the staff steps on the footrest 102, the anti-skid pattern 105 can prevent the foot from sliding on the footrest 102, so that the staff can stand and exert force more stably, which helps to better control the movement of the foot buckle 1 during the climbing process. The locking assembly 106 provided on the footrest 102 plays an important role in safety protection and operational convenience. The locking assembly 106 adopts a snap-on locking method, which is simple to operate, firmly locked, and easy to unlock, so that the staff can operate quickly and accurately. After the staff places the foot on the footrest 102 and adjusts the position, the foot can be fixed on the footrest 102 by operating the locking assembly 106 to prevent the foot from accidentally slipping during the climbing process.

[0049] The specific operation process of the present invention is as follows:

[0050] First, according to the outer diameter of the pole, adjust the opening and closing angle and the inner diameter of the buckle body 101 through the adjustment component 103, so that the foot buckle 1 can be smoothly put on the pole later, and then put the seat frame 3 on the pole through the annular opening 301 at the front thereof. After the seat frame 3 is put on, operate the clamping component 302 on the annular opening 301 to tightly clamp the seat frame 3 on the pole to prevent the seat frame 3 from shaking or shifting during the climbing process. Take out the guide rod 201 of the elastic power-assisting mechanism 2 and bring it with you. The threaded end is inserted into the mounting hole 304 on the side wall of the seat frame 3, and the guide rod 201 is fastened in the mounting hole 304 by the nut 307. The buckle body 101 of the foot buckle 1 is put on the pole tower below the seat frame 3 through its openable and closable structure. After the foot buckle 1 is put on, the adjustment component 103 of the foot buckle 1 is further fine-tuned according to the outer diameter of the pole tower, and the connecting block 401 on the spring 203 is tightened with the connecting groove 402 on the foot buckle 1 through threads to complete the connection between the elastic power-assisting mechanism 2 and the foot buckle 1.

[0051] When climbing a telegraph pole tower, the staff first connects one end of the safety belt worn by the staff to the safety buckle connection point 305 on the side wall of the seat frame 3 to ensure that the connection is firm and reliable to ensure personal safety during the climbing process. Then place the foot on the foot pedal 102 of the foot buckle 1, adjust the foot position so that the center of gravity of the foot is evenly distributed, and then operate the locking assembly 106 on the foot pedal 102 to fix the foot on the foot pedal 102 to prevent the foot from accidentally slipping during the climbing process. When preparing to climb upward, the staff holds the pole tower with his hands, squats slightly, and presses down the seat frame 3 through the leg strength. The action of pressing down the seat frame 3 will cause the seat frame 3 to produce a downward displacement relative to the foot buckle 1. Due to the connection relationship of the elastic power-assisting mechanism 2, the displacement of the seat frame 3 will be transmitted to the spring 203 through the guide rod 201, causing the spring 203 to be compressed and store elastic potential energy. When the pressure is pressed to a certain extent, the staff releases the downward pressure, and the spring 203 returns to its original state and generates an upward elastic force. This elastic force is transmitted to the foot buckle 1 through the connecting mechanism 4, exerting an upward thrust on the foot buckle 1. The foot buckle 1 converts the thrust into an upward force by means of the friction between the foot buckle 1 and the pole tower, so that the staff can easily lift the foot buckle 1 to climb. After climbing a certain distance each time, the above pressing and releasing actions can be repeated as needed to continuously obtain the force and achieve easier climbing of the pole tower.

[0052] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A climbing aid for a power transmission line tower, comprising a foot buckle (1), characterized in that The foot buckle (1) is connected to an elastic power-assisting mechanism (2), and the elastic power-assisting mechanism (2) is connected to a seat frame (3); The elastic assist mechanism (2) is symmetrically arranged on both sides of the seat frame (3), and the elastic assist mechanism (2) comprises a guide rod (201), one end of the guide rod (201) is connected to the seat frame (3), a limit block (202) is provided on the guide rod (201), and a spring (203) is sleeved on the guide rod (201), one end of the spring (203) is indirectly connected to the seat frame (3) through the guide rod (201), and the other end is connected to the foot buckle (1) through a connecting mechanism (4).

2. A climbing aid device for a power transmission line tower according to claim 1, characterized in that: The connecting mechanism (4) comprises a connecting block (401) and a connecting groove (402); the connecting block (401) is provided with a thread connected to an end of the spring (203) away from the seat frame (3); the connecting groove (402) is arranged on the outside of the foot buckle (1) and is provided with a thread matching the connecting block (401).

3. The climbing aid device for a power transmission line tower according to claim 1, characterized in that: The guide rod (201) is a smooth cylinder. The length of the guide rod (201) is greater than the free length of the spring (203), and the diameter of the guide rod (201) is greater than the inner diameter of the spring (203). In addition, one end of the guide rod (201) connected to the seat frame (3) is provided with a thread.

4. The climbing aid device for a power transmission line tower according to claim 1, characterized in that: The limiting block (202) is located on a side of the guide rod (201) away from the seat frame (3) and has a size greater than the diameter of the guide rod (201).

5. The climbing aid device for a power transmission line tower according to claim 1, characterized in that: The front of the seat frame (3) is provided with an annular opening (301), the annular opening (301) is provided with a clamping assembly (302), the top of the seat frame (3) is provided with a folding backrest (303), the side wall of the seat frame (3) is provided with a mounting hole (304) and a safety buckle connection point (305), and the bottom of the seat frame (3) is also provided with a support pad (306), and the mounting hole (304) is detachably connected to one end of the guide rod (201).

6. A climbing aid device for a power transmission line tower according to claim 5, characterized in that: A nut (307) matching one end of the guide rod (201) is arranged in the mounting hole (304), and the nut (307) can move up and down in the mounting hole (304).

7. The climbing aid device for a power transmission line tower according to claim 5, characterized in that: The support pad (306) is made of wear-resistant rubber and has an arc shape that matches the surface of the electric pole tower.

8. The climbing aid device for a power transmission line tower according to claim 1, characterized in that: The foot buckle (1) comprises a buckle body (101), the buckle body (101) is mounted on a foot pedal (102), and the connecting groove (402) of the connecting mechanism (4) is arranged on the foot pedal (102).

9. The climbing aid device for a power transmission line tower according to claim 8, characterized in that: An adjustment component (103) is provided on the buckle body, and an anti-slip rubber pad (104) is provided on the inner side of the buckle body (101).

10. The climbing aid device for a power transmission line tower according to claim 8, characterized in that: The upper surface of the foot pedal (102) is provided with anti-slip grooves (105), and a locking assembly (106) is also provided thereon.

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