CN209523704U - A climbing ladder automatic locking structure applied to power line maintenance - Google Patents

Abstract

The utility model discloses an automatic locking structure for a climbing ladder used in power line maintenance, mainly comprising a hook, the hook is composed of an upper hook, a middle hook support arm and a lower telescopic column, and the upper hook of the hook is in an inverted U-shaped structure , the interior is provided with a pulley, the positioning shaft runs through the hook, the pulley and the positioning nut are fixedly connected, the positioning shaft and the pulley are connected in rotation, the upper hook of the hook is fixedly connected through the middle hook support arm and the lower telescopic column; the lower telescopic column of the hook Slidingly connected with the positioning column, the right side of the positioning column is rotationally connected with one end of the positioning block through a hinge, the other end of the positioning block is threaded with one end of the transmission link, and the other end of the transmission link is rotationally connected with one end of the positioning plate through the first bolt shaft. The utility model has the advantages of simple structure, adopts an automatic locking structure, plays an efficient and stable fixing role on the ladder, ensures the personal safety of the staff on the ladder, and improves the maintenance efficiency.

Description

A climbing ladder automatic locking structure applied to power line maintenance

technical field

The utility model relates to the technical field of power line maintenance tools, in particular to an automatic locking structure for climbing ladders used in power line maintenance.

Background technique

In order to ensure the safety and stability of the power grid, ensure the normal operation of transmission lines and improve the reliability of the power grid, live work is generally used. The insulating ladder is one of the important work tools for live work, and has been widely used in electric work. An insulating ladder with a traditional structure generally includes a ladder body and an insulating material coated on the surface of the ladder body. The use of the traditional structure of the insulating ladder is the same as that of the ordinary ladder. When using it, it is only necessary to lean the insulating ladder against the equipment to be inspected. However, in the actual work process, on the one hand, the insulating ladder is hung on the cross arm or wire during maintenance. On the other hand, because the power lines are erected on the poles, the power inspection department often needs to use ladders when they overhaul the power lines, and most of the ladders currently used are traditional ladders, and the power maintenance personnel are using In the process of checking and repairing power lines with traditional ladders, because there is no good fixing device between the ladder and the utility pole, and the ladder itself does not have a good fixing device, it is easy to cause slipping accidents for electric maintenance personnel during maintenance. Thereby posing a threat to the life and property safety of electric maintenance personnel.

Therefore, based on the above problems, this structure mainly focuses on how to use the automatic locking device for the ladder to play an efficient and stable fixing role, ensure the personal safety of the staff on the ladder, and carry out technical research to improve the maintenance efficiency.

At present, the ladders for maintenance of power transmission lines produced by domestic tool manufacturers are all manual locking devices and the locking reliability is low. The disadvantages are very obvious: in the actual work process, the ladders are hung on the cross arms or wires by ropes , the operation is very cumbersome and the work efficiency is low; on the other hand, because there is no good fixing device between the ladder and the tower, and the ladder itself does not have a good fixing device, it is easy to cause the electric maintenance personnel to slip and fall during maintenance. Therefore, it is of high value to carry out technical research and application to improve the maintenance efficiency of transmission line towers and ensure the personal safety of personnel working at heights.

Utility model content

The purpose of this utility model is to provide an automatic locking structure of the ladder used in the maintenance of electric power lines. Improve maintenance efficiency.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a ladder automatic lock structure applied to power line maintenance, mainly including positioning columns, positioning blocks, transmission connecting rods, first bolt shafts, positioning plates, hooks, Telescopic column, hook support arm, positioning shaft, pulley, positioning nut, third bolt shaft, spring positioning stud and second bolt shaft, the hook is composed of an upper hook, a middle hook support arm and a lower telescopic column, and the upper hook of the hook is It is an inverted "U"-shaped structure, with a pulley inside, the positioning shaft runs through the hook, the pulley and the positioning nut are fixedly connected, the positioning shaft and the pulley are connected in rotation, and the upper hook of the hook is fixedly connected through the middle hook support arm and the lower telescopic column; It is characterized in that: the telescopic column at the lower part of the hook is slidingly connected with the positioning column, the right side of the positioning column is rotationally connected with one end of the positioning block through a hinge, the other end of the positioning block is screwed with one end of the transmission link, and the other end of the transmission link is passed through The first bolt shaft is rotatably connected to one end of the positioning plate, and the middle part of the positioning plate is rotatably connected to the hook support arm through the second bolt shaft.

Further, the shape of the positioning post is cylindrical, the upper part of the positioning post is radially provided with a third bolt hole, the upper part of the positioning post is provided with a square through hole in the axial direction, the lower part of the positioning post is provided with a connecting threaded hole, and the connecting threaded hole and the square through hole The holes are connected.

Further, the shape of the telescopic column is in the shape of a square prism, a U-shaped through hole is opened in the middle of the telescopic column, and a spring positioning threaded hole is axially opened at the lower end of the telescopic column, and the spring positioning threaded hole is connected with the U-shaped through hole; The lower end of the column runs through the square through hole and cylindrical blind hole on the upper part of the positioning column and extends below the positioning column. The third bolt shaft is set through the gasket and the third bolt hole in turn, and is fixedly connected by the fixing nut.

Further, a return spring is provided in the U-shaped through hole, the upper end of the return spring is connected to the third bolt shaft, the lower end of the return spring is connected to the top of the spring positioning stud, and the spring positioning stud is threaded to the spring positioning threaded hole.

Further, the upper hook of the hook, the support arm of the middle hook and the telescopic column at the lower part are integrally formed, and the hook is made of aluminum alloy.

Further, one end of the positioning shaft is provided with a thread, and the positioning shaft is fixedly connected to the positioning nut through its thread.

Further, the positioning column is fixedly connected to the top of the insulating ladder through the connecting threaded hole.

Further, the top view of the positioning plate is in the shape of "I".

Further, the pulley is made of insulating plastic material.

Compared with the prior art, the utility model has the following beneficial effects: First: the automatic locking structure is installed on the top of the insulating ladder, and when the power maintenance work is in progress, the automatic locking structure is hung on the cross arm or the wire, Under the self-gravity of the insulating ladder, the insulating ladder has a downward force on the positioning column. At this time, the return spring is compressed. When the return spring is compressed to the shortest position, the positioning plate is horizontal. At this time, the left end of the positioning plate and the upper hook of the hook A locking structure is formed (this automatic locking structure is locked on the cross arm or wire), so that the insulating ladder is locked through the automatic locking structure and the cross arm or wire, the insulating ladder is not easy to disengage, and the safety is high, which plays an important role in the ladder Efficient and stable fixing function ensures the personal safety of the staff on the ladder and improves the maintenance efficiency. Second: The automatic locking structure has simple structure, low production cost, no maintenance, and can effectively and stably fix the climbing ladder, avoiding the phenomenon that the insulation climbing ladder falls when the power maintenance personnel repair the power, and ensures the power Maintenance safety improves maintenance efficiency. Third: the automatic locking structure is threadedly connected between the positioning block and the transmission connecting rod, which is convenient for adjusting the locking degree of the automatic locking structure; when the positioning plate and the upper hook of the hook cannot be locked, adjust the positioning block and The relative length of the transmission link (mutual rotation between the positioning block and the transmission link) makes the total length of the positioning block and the transmission link shorten, so that the automatic locking structure can be restored to the locked state. By being provided with a return spring in the U-shaped through hole, the upper end of the return spring is connected with the third bolt shaft, the lower end of the return spring is connected with the top of the spring positioning stud, and the spring positioning stud is threaded with the spring positioning threaded hole, so that the positioning post and When the insulating ladder is used, the telescopic column is automatically locked due to the weight of the insulating ladder. After use, it can be automatically unlocked by manually moving the insulating ladder upwards, which is convenient for placement and disassembly between the insulating ladder and the wire or cross arm. By rotating the spring positioning stud, the tightness of the return spring can be adjusted, making the automatic locking structure more flexible in use.

Description of drawings

Fig. 1 is the structural representation of the locking state of the present utility model;

Fig. 2 is the structural representation of the initial state of the utility model;

Fig. 3 is the structural schematic diagram of the hook of the present utility model;

Fig. 4 is the front side view of the positioning plate of the present utility model;

Fig. 5 is the top view of the positioning plate of the present utility model;

Fig. 6 is a schematic diagram of the appearance and structure of the positioning column of the present invention;

Fig. 7 is a sectional view of the positioning column of the present invention;

Fig. 8 is a top view of the positioning column of the present invention;

Fig. 9 is a bottom view of the positioning column of the present invention;

In the figure: 1, positioning column; 1-1, third bolt hole; 1-2, square through hole; 1-3, connecting threaded hole; 2, positioning block; 3, transmission connecting rod; 4, first bolt shaft ;5, positioning plate; 5-1, first positioning through hole; 5-2, second positioning through hole; 6, hook; 6-1, U-shaped through hole; 6-2, spring positioning threaded hole; 6- 3. Telescopic column; 6-4. Hook support arm; 7. Positioning shaft; 8. Pulley; 9. Positioning nut; 10. Third bolt shaft; 11. Gasket; 12. Spring positioning stud; 13. Second Bolt shaft.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

As shown in Figure 1-9, a ladder automatic locking structure applied to power line maintenance mainly includes positioning column 1, positioning block 2, transmission connecting rod 3, first bolt shaft 4, positioning plate 5, hook 6, Telescopic column 6-3, hook support arm 6-4, positioning shaft 7, pulley 8, positioning nut 9, the third bolt shaft 10, spring positioning stud 12 and the second bolt shaft 13, the described hook 6 consists of upper hook, The middle hook support arm 6-4 and the lower telescopic column 6-3 are composed. The upper hook of the hook 6 is an inverted "U"-shaped structure, and a pulley 8 is arranged inside it. The positioning shaft 7 runs through the hook 6, the pulley 8 and the positioning nut 9. Fixedly connected, the positioning shaft 7 and the pulley 8 are connected in rotation, and the upper hook of the hook 6 is fixedly connected through the middle hook support arm 6-4 and the lower telescopic column 6-3; it is characterized in that: the lower telescopic column 6-3 of the hook 6 and The positioning column 1 is slidingly connected, the right side of the positioning column 1 is rotationally connected with one end of the positioning block 2 through a hinge, the other end of the positioning block 2 is screwed with one end of the transmission connecting rod 3, and the other end of the transmission connecting rod 3 is connected by the first bolt shaft 4 and One end of the positioning plate 5 is rotationally connected, and the middle part of the positioning plate 5 is rotationally connected with the hook support arm 6-4 through the second bolt shaft 13.

Wherein, the shape of the positioning column 1 is cylindrical, the upper part of the positioning column 1 is radially provided with a third bolt hole 1-1, the upper part of the positioning column 1 is axially provided with a square through hole 1-2, and the lower part of the positioning column 1 is provided with a connection Threaded hole 1-3, connecting threaded hole 1-3 communicates with square through hole 1-2.

Wherein, the shape of the telescopic column 6-3 is a quadrangular prism, the middle part of the telescopic column 6-3 has a U-shaped through hole 6-1, and the lower end of the telescopic column 6-3 is axially provided with a spring positioning threaded hole 6-2, and the spring The positioning threaded hole 6-2 communicates with the U-shaped through hole 6-1; the lower end of the telescopic column 6-3 runs through the square through hole 1-2 and the cylindrical blind hole on the upper part of the positioning column 1 and extends below the positioning column 1, The third bolt shaft 10 is arranged through the washer 11 and the third bolt hole 1-1 in turn, and is fixedly connected by a fixing nut.

Wherein, a return spring is also provided in the U-shaped through hole 6-1, the upper end of the return spring is connected with the third bolt shaft 10, the lower end of the return spring is connected with the top of the spring positioning stud 12, and the spring positioning stud 12 and the spring positioning Threaded hole 6-2 threaded connection.

Wherein, the upper hook of the hook 6, the middle hook support arm 6-4 and the lower telescopic column 6-3 are integrally formed, and the hook 6 is made of aluminum alloy material.

Wherein, one end of the positioning shaft 7 is provided with a thread, and the positioning shaft 7 is fixedly connected with the positioning nut 9 through its thread.

Wherein, the positioning column 1 is fixedly connected to the top of the insulating ladder through the connecting threaded hole 1-3.

Wherein, the top view of the positioning plate 5 is in the shape of "I".

Wherein, the pulley 8 is made of insulating plastic material.

It should be noted that the utility model is a ladder automatic locking structure applied to power line maintenance. When in use, the automatic locking structure is first fixedly connected to the top of the insulating ladder through the connecting threaded holes 1-3 (that is, the The automatic locking structure is installed on the top of the insulating ladder.) When the power maintenance work is in progress, the automatic locking structure is hung on the cross arm or the wire. Under the self-gravity of the insulating ladder, the positioning column 1 has a downward force. At this time, the return spring is compressed, and the through hole 6-3 of the support arm of the hook and the positioning column 1 produce relative sliding. The rod 3 pulls the right end of the positioning plate 5 downwards. When the spring is compressed to the shortest position, the positioning plate 5 is horizontal (as shown in Figure 1). At this time, the left end of the positioning plate 5 and the upper hook of the hook 6 form a locking structure. It plays an efficient and stable fixing role, ensures the personal safety of the staff on the ladder, and improves the maintenance efficiency. The automatic locking structure is threadedly connected between the positioning block 2 and the transmission connecting rod 3, which is convenient for adjusting the locking degree of the automatic locking structure; when the positioning plate 2 and the upper hook of the hook 6 cannot be locked, adjust the positioning block 2 and the relative length of the transmission link 3 (mutual rotation between the positioning block 2 and the transmission link 3), so that the total length of the positioning block 2 and the transmission link 3 is shortened, and the automatic locking structure can be restored and locked state. By being provided with a return spring in the U-shaped through hole 6-1, the upper end of the return spring is connected with the third bolt shaft 10, the lower end of the return spring is connected with the top of the spring positioning stud 12, and the spring positioning stud 12 and the spring positioning threaded hole 6 -2 threaded connection, so that the positioning column 1 and the telescopic column 6-3 are automatically locked due to the weight of the insulating ladder when the insulating ladder is used. Placement and disassembly between loads. By rotating the spring positioning stud 12, the tightness of the return spring can be adjusted, making the automatic locking structure more flexible to use.

What is disclosed above is only a preferred embodiment of the present utility model, and of course it cannot be used to limit the scope of rights of the present utility model. Those of ordinary skill in the art can understand all or part of the process of realizing the above-mentioned embodiments, and according to this Equivalent changes made to the claims of the utility model still fall within the scope of the utility model.

Claims (6)

1. A ladder automatic locking structure applied to power line maintenance, mainly including positioning columns, positioning blocks, transmission connecting rods, first bolt shafts, positioning plates, hooks, telescopic columns, hook support arms, positioning shafts, pulleys, The positioning nut, the third bolt shaft, the spring positioning stud and the second bolt shaft. The hook is composed of an upper hook, a middle hook support arm and a lower telescopic column. The upper hook of the hook is in an inverted "U" shape. The pulley, the positioning shaft runs through the hook, the pulley and the positioning nut are fixedly connected, the positioning shaft and the pulley are connected in rotation, and the upper hook of the hook is fixedly connected with the lower telescopic column through the middle hook support arm; it is characterized in that: the lower telescopic column of the hook and The positioning column is slidingly connected, and the right side of the positioning column is rotationally connected with one end of the positioning block through a hinge. The middle part of the board is rotationally connected with the support arm of the hook through the second bolt shaft. 2. A ladder automatic lock structure applied to power line maintenance according to claim 1, characterized in that: the positioning column is cylindrical in shape, the upper part of the positioning column is radially provided with a third bolt hole, and the positioning column The upper part is axially provided with a square through hole, and the lower part of the positioning column is provided with a connecting threaded hole, and the connecting threaded hole communicates with the square through hole. 3. A climbing ladder automatic lock structure applied to power line maintenance according to claim 1, characterized in that: the shape of the telescopic column is in the shape of a square prism, a U-shaped through hole is opened in the middle of the telescopic column, and the lower end of the telescopic column is A spring positioning threaded hole is opened in the axial direction, and the spring positioning threaded hole communicates with the U-shaped through hole; the lower end of the telescopic column passes through the square through hole and the cylindrical blind hole on the upper part of the positioning column and extends below the positioning column, and the third The bolt shafts are set through the gasket and the third bolt hole in turn, and are fixedly connected by the fixing nut. 4. A climbing ladder automatic locking structure applied to power line maintenance according to claim 3, characterized in that: a return spring is also provided in the U-shaped through hole, and the upper end of the return spring is connected to the third bolt shaft, The lower end of the return spring is connected with the top of the spring positioning stud, and the spring positioning stud is threadedly connected with the spring positioning threaded hole. 5. A climbing ladder automatic lock structure applied to power line maintenance according to claim 1, characterized in that: the upper hook of the hook, the support arm of the middle hook and the lower telescopic column are integrally formed, and the hook is made of aluminum Made of alloy material. 6 . The ladder automatic locking structure applied to power line maintenance according to claim 1 , characterized in that: one end of the positioning shaft is provided with a thread, and the positioning shaft is fixedly connected to the positioning nut through its thread.