Pulley device

Abstract

A pulley device includes: a load-bearing frame including a first load-bearing arm and a second load-bearing arm that are interlocked; a pulley rotatably arranged between the two load-bearing arms; a traction rope wound around the pulley; and a hanging ring arranged at the top of the two load-bearing arms. A pair of parallel limit surfaces are formed at the end of the main shaft; a limit block is fixed on the outer end surface of the first load-bearing arm, and an opening and a retaining groove that is connected to the opening and is defined by a pair of parallel retaining walls are provided in the limit block from bottom to top; the main shaft passes through the second load-bearing arm from the outside of the second load-bearing arm, then passes through the pulley, then passes through the first load-bearing arm, and then passes through the opening of the limit block, and the limit block moves downward relative to the main shaft, and finally a pair of parallel limit surfaces of the main shaft are clamped between a pair of parallel retaining walls. The pulley device provided by the present invention has a compact structure and light weight, which greatly reduces the labor intensity of maintenance personnel, and is safe, reliable, and has low wear.

Description

Technical Field

[0001] The invention relates to the technical field of outdoor power transmission line maintenance, and in particular to a pulley device. Background Art

[0002] As we all know, in the outdoor transmission line maintenance work of the power system, especially the live maintenance work of ultra-high voltage transmission lines, pulleys are used in large quantities to transfer various maintenance tools and materials to assist in entering the equipotential operation.

[0003] In the prior art, when maintenance personnel perform maintenance work on the conductors and ground wires of outdoor power transmission lines, they usually directly hang pulleys and transfer ropes used to transfer tools and materials on the maintenance personnel, and the maintenance personnel climb to the conductors and ground wires carrying the pulleys and transfer ropes on their backs.

[0004] This will be a huge burden for maintenance personnel, because these devices are very heavy and it is a huge test for their physical strength.

[0005] In addition, for ultra-high voltage transmission lines, the distance between the conductor and the ground is very high, especially in the case of double circuits on the same tower, the height of the upper conductor from the ground is more than 60 meters. The pulleys and transfer ropes carried by maintenance personnel are very heavy, and the resistance to the maintenance personnel during the operation is more prominent when there is wind. In addition, when maintenance personnel are walking, because the transfer rope is in direct contact with the conductor, the mutual wear caused by the friction between the two cannot be avoided, especially the insulating rope used in live work, which will cause serious dirt and wear of the insulating rope, resulting in poor insulation performance of the insulating rope, which in turn brings the risk of electric shock to maintenance personnel, and the labor intensity of maintenance personnel is high. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a pulley device which has a compact structure and is light in weight, thereby greatly reducing the labor intensity of maintenance personnel, and is safe, reliable and has low wear.

[0007] A pulley device includes: a load-bearing frame including a first load-bearing arm and a second load-bearing arm that are interlocked together, a pulley arranged between the first load-bearing arm and the second load-bearing arm of the load-bearing frame and rotating by means of a main shaft and a limit block that cooperate with each other, a traction rope wound around the pulley, and a hanging ring arranged at the top of the first load-bearing arm and the second load-bearing arm.

[0008] Specifically, a pair of parallel limiting surfaces are formed at the end of the main shaft; the limiting block is fixed on the outer end surface of the first load-bearing arm, and an opening and a retaining groove connected to the opening and defined by a pair of parallel retaining walls are opened from bottom to top in the limiting block; the main shaft passes through the second load-bearing arm from the outside of the second load-bearing arm, then passes through the pulley, then passes through the first load-bearing arm, and then passes through the opening of the limiting block, and under the action of gravity, the limiting block moves downward relative to the main shaft, and finally allows the pair of parallel limiting surfaces of the main shaft to be stuck between the pair of parallel retaining walls.

[0009] In the above-mentioned pulley device, since the limit block is fixed on the outer end face of the first load-bearing arm, the limit block cannot rotate relative to the first load-bearing arm; at the same time, since the two limit surfaces of the main shaft are restricted between the pair of parallel retaining walls, they cannot rotate relative to the limit block; therefore, in fact, it is equivalent to that the main shaft cannot rotate relative to the first load-bearing arm, that is, the main shaft cannot rotate relative to the load-bearing frame.

[0010] In addition, because under the action of gravity, the limit block always moves downward relative to the main shaft, and finally a pair of parallel limit surfaces of the main shaft are stuck between the pair of parallel retaining walls. Therefore, no matter how strong the external load or vibration is, the limit block can always stably fix the main shaft relative to the load-bearing frame, thereby preventing relative rotation between the two.

[0011] When the pulley device provided by the present invention is in use, one end of the traction rope is used to fix the weight, and the other end passes through the pulley, and then the hanging ring is buckled in a stable, safe and appropriate position. At this time, the end of the traction rope without the weight can be used to lift the weight.

[0012] The pulley device provided by the present invention has a compact overall structure and light weight. It can be carried by a drone, and the use of the drone to transport the pulley not only greatly improves work safety, especially live work, avoids mutual wear between the insulated traction rope and the wire, ensures the cleanliness and insulation performance of the insulated traction rope, but also greatly reduces the labor intensity of maintenance personnel.

[0013] In addition, in view of the needs of ultra-high voltage maintenance operations, pulley devices with both insulating and non-insulating functions are made from materials. The insulating pulley device is made of high-strength lightweight insulating material, and the non-insulating pulley device is made of high-strength lightweight aluminum alloy.

[0014] Preferably, the first load-bearing arm comprises: a first hanging plate with a first hanging hole formed thereon, a first shoulder extending obliquely downward along the bottom of the first hanging plate, a first arm extending downward from the bottom of the first shoulder in a direction parallel to the plane where the first hanging plate is located, a first inclined portion extending downward from the bottom of the first arm in a direction gradually approaching the first hanging plate, and a first shaft plate extending downward from the bottom of the first inclined portion in a direction parallel to the plane where the first hanging plate is located. The first shaft plate has a first shaft hole formed thereon.

[0015] Similarly, the second load-bearing arm includes: a second hanging plate with a second hanging hole, a second shoulder extending obliquely downward along the bottom of the second hanging plate, a second arm extending downward from the bottom of the second shoulder in a direction parallel to the plane where the second hanging plate is located, a second inclined portion extending downward from the bottom of the second arm in a direction gradually approaching the second hanging plate, and a second shaft plate extending downward from the bottom of the second inclined portion in a direction parallel to the plane where the second hanging plate is located. The second shaft plate has a second shaft hole.

[0016] Preferably, the inner diameter of the second axial hole is larger than the inner diameter of the first axial hole; and the main shaft preferably includes a flange, a first axial body extending axially from one end of the flange, and a second axial body extending axially from the end of the first axial body; the flange abuts against the end face of the second axial plate, the first axial body passes through the second axial hole, and the second axial body passes through the first axial hole and the opening of the limit block.

[0017] Preferably, the pair of mutually parallel limiting surfaces are formed on the second shaft body.

[0018] Preferably, a mounting hole is provided on the outer end surface of the first axis plate; a stopper is fixed to the first axis plate of the first load-bearing arm by means of a screw passing through the mounting hole, and the stopper is clamped in the opening of the limit block.

[0019] Preferably, the first load-bearing arm is provided with a hollow portion that passes through the first shoulder and the first arm. Similarly, the second load-bearing arm is provided with a hollow portion that passes through the second shoulder and the second arm. Providing these hollow portions can reduce the weight of the entire load-bearing arm, thereby reducing the weight of the entire pulley device, so that maintenance personnel or drones can save effort when carrying the pulley, and the labor intensity of maintenance personnel can be greatly reduced.

[0020] Preferably, the pulley comprises a circumferential portion and circumferential ribs formed on two end surface edges of the circumferential portion, the traction rope is wound around the circumferential portion, and the two circumferential ribs restrict the traction rope from detaching from the circumferential portion.

[0021] Preferably, the hanging ring includes a U-shaped bottom ring hooked in the first hanging hole and the second hanging hole of the first load-bearing arm and the second load-bearing arm and a rotating hook rotatably arranged on the U-shaped bottom ring, and the U-shaped bottom ring and the rotating hook are fixed to each other by means of a locking nut. This new locking method reduces the weight of the pulley device and improves safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 is a three-dimensional structural diagram of a pulley device according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 An exploded perspective view of the pulley assembly shown;

[0025] Figure 3 for Figure 1 An exploded perspective view of the pulley assembly shown from another angle;

[0026] Figure 4 for Figure 3 An enlarged perspective view of a partial structure of the pulley device shown; and

[0027] Figure 5 It is a three-dimensional structural diagram of some components of a pulley device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0029] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] refer to Figure 1-5 According to one embodiment of the present invention, a pulley device 100 includes:

[0031] The invention comprises a load-bearing frame 10 including a first load-bearing arm 12 and a second load-bearing arm 14 which are interlocked with each other, a pulley 20 which is arranged between the first load-bearing arm 12 and the second load-bearing arm 14 of the load-bearing frame 10 and is rotated by means of a main shaft 50 and a limit block 60 which cooperate with each other, a traction rope 40 which is wound around the pulley 20, and a hanging ring 30 which is arranged at the top of the first load-bearing arm 12 and the second load-bearing arm 14.

[0032] Specifically, a pair of parallel limiting surfaces 562 are formed at the end of the main shaft 50; the limiting block 60 is fixed on the outer end surface of the first load-bearing arm 12, and an opening 62 and a retaining groove 66 connected to the opening 62 and defined by a pair of parallel retaining walls 64 are opened from bottom to top in the limiting block 60; the main shaft 50 passes through the second load-bearing arm 14 from the outside of the second load-bearing arm 14, then passes through the pulley 20, then passes through the first load-bearing arm 12, and then passes through the opening 62 of the limiting block 60. Under the action of gravity, the limiting block 60 moves downward relative to the main shaft 50, and finally allows the pair of parallel limiting surfaces 562 of the main shaft 50 to be stuck between the pair of parallel retaining walls 64.

[0033] In the above-mentioned pulley device 100, since the limit block 60 is fixed on the outer end face of the first load-bearing arm 12, the limit block 60 cannot rotate relative to the first load-bearing arm 12; at the same time, since the two limit surfaces 562 of the main shaft 50 are restricted between the pair of parallel retaining walls 64 and cannot rotate relative to the limit block 60; therefore, in fact, it is equivalent to that the main shaft 50 cannot rotate relative to the first load-bearing arm 12, that is, the main shaft 50 cannot rotate relative to the load-bearing frame 10.

[0034] In addition, because under the action of gravity, the limit block 60 always moves downward relative to the main shaft 50, and finally a pair of parallel limit surfaces 562 of the main shaft 50 are stuck between the pair of parallel retaining walls 64. Therefore, no matter how strong the external load or vibration is, the limit block 60 can always stably fix the main shaft 50 relative to the load-bearing frame 10, thereby preventing relative rotation between the two.

[0035] When the pulley device 100 provided by the present invention is in use, one end of the traction rope 40 fixes the weight, and the other end passes through the pulley 20, and then the hanging ring 30 is buckled in a stable, safe and appropriate position. At this time, the end of the traction rope 40 without the weight can be used to lift the weight. The overall structure of the pulley device 100 provided by the present invention is compact and light. It can be carried by a drone, and the use of a drone to transport the pulley not only greatly improves work safety, especially live work, avoids mutual wear between the insulated traction rope and the wire, ensures the cleanliness and insulation performance of the insulated traction rope, and greatly reduces the labor intensity of maintenance personnel.

[0036] In addition, in view of the needs of ultra-high voltage maintenance operations, pulley devices with both insulating and non-insulating functions are made from materials. The insulating pulley device is made of high-strength lightweight insulating material, and the non-insulating pulley device is made of high-strength lightweight aluminum alloy.

[0037] Preferably, the first load-bearing arm 12 comprises: a first hanging plate 122 with a first hanging hole 1222 formed thereon, a first shoulder 124 extending obliquely downward along the bottom of the first hanging plate 122, a first arm 126 extending downward from the bottom of the first shoulder 124 in a direction parallel to the plane where the first hanging plate 122 is located, a first inclined portion 128 inclined downward from the bottom of the first arm 126 and extending in a direction gradually approaching the first hanging plate 122, and a first shaft plate 1289 extending downward from the bottom of the first inclined portion 128 in a direction parallel to the plane where the first hanging plate 122 is located. The first shaft plate 1289 has a first shaft hole 1282 formed therein.

[0038] Similarly, the second load-bearing arm 14 includes: a second hanging plate 142 having a second hanging hole 1422 formed thereon, a second shoulder 144 extending obliquely downward along the bottom of the second hanging plate 142, a second arm 146 extending downward from the bottom of the second shoulder 144 in a direction parallel to the plane where the second hanging plate 142 is located, a second inclined portion 148 inclined downward from the bottom of the second arm 146 and extending in a direction gradually approaching the second hanging plate 142, and a second shaft plate 1489 extending downward from the bottom of the second inclined portion 148 in a direction parallel to the plane where the second hanging plate 142 is located. The second shaft plate 1489 has a second shaft hole 1482 formed therein.

[0039] Preferably, the inner diameter of the second shaft hole 1482 is greater than the inner diameter of the first shaft hole 1282; and the main shaft 50 preferably includes a flange 52, a first shaft body 54 axially extending from one end of the flange 52, and a second shaft body 56 axially extending from the end of the first shaft body 54; the flange 52 abuts against the end surface of the second shaft plate 1489, the first shaft body 54 passes through the second shaft hole 1482, and the second shaft body 56 passes through the first shaft hole 1282 and the opening 62 of the stop block 60. Preferably, the pair of mutually parallel stop surfaces 562 are formed on the second shaft body 56.

[0040] Preferably, a mounting hole 1284 is opened on the outer end face of the first axis plate 1289; a stop block 70 is fixed to the first axis plate 1289 of the first load-bearing arm 12 by means of a screw 80 passing through the mounting hole 1284, and the stop block 70 is clamped in the opening 62 of the limit block 60.

[0041] Preferably, the first load-bearing arm 12 is provided with a hollow portion 123 penetrating the first shoulder 124 and the first arm 1265. Similarly, the second load-bearing arm 14 is provided with a hollow portion 143 penetrating the second shoulder 144 and the second arm 1465. Providing these hollow portions can reduce the weight of the entire load-bearing arm, thereby reducing the weight of the entire pulley device 100, so that maintenance personnel or drones can save effort when carrying the pulley, and the labor intensity of maintenance personnel can be greatly reduced.

[0042] Preferably, the pulley 20 includes a circumferential portion 22 and circumferential ribs 24 formed on two end surface edges of the circumferential portion 22 , the traction rope 40 is wound around the circumferential portion 22 , and the two circumferential ribs 24 restrict the traction rope 40 from detaching from the circumferential portion 22 .

[0043] Preferably, the hanging ring 30 includes a U-shaped bottom ring 32 hooked in the first hanging hole 1222 and the second hanging hole 1422 of the first load-bearing arm 12 and the second load-bearing arm 14, and a rotating hook 34 rotatably arranged on the U-shaped bottom ring 32, and the U-shaped bottom ring 32 and the rotating hook 34 are fixed to each other by means of a locking nut 36. This new locking method reduces the weight of the pulley device and improves the safety performance.

[0044] In addition, since the first load-bearing arm 12 and the second load-bearing arm 14 are independent components and are interlocked with each other, in case the traction rope is difficult to pass directly through the pulley 20, the first load-bearing arm 12 and the second load-bearing arm 14 can be staggered at a certain angle to form a gap therebetween, thereby making it easier for the traction rope to enter through the gap and be wrapped around the pulley 20.

[0045] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A pulley device, comprising: A load-bearing frame comprising a first load-bearing arm and a second load-bearing arm that are interlocked with each other; The pulley disposed between the first load-bearing arm and the second load-bearing arm of the load-bearing frame is rotated by means of the main shaft and the limit block that cooperate with each other; the traction rope wound around the pulley; and the hanging ring disposed on the top of the first load-bearing arm and the second load-bearing arm, characterized in that: The end of the main shaft forms a pair of parallel limiting surfaces; the limiting block is fixed on the outer end surface of the first load-bearing arm, and the limiting block is provided with an opening from bottom to top and a retaining groove connected with the opening and defined by a pair of parallel retaining walls; the main shaft passes through the second load-bearing arm from the outer side of the second load-bearing arm, then passes through the pulley, then passes through the first load-bearing arm, and then passes through the opening of the limiting block, the limiting block moves downward relative to the main shaft, and finally allows the pair of parallel limiting surfaces of the main shaft to be clamped between the pair of parallel retaining walls; the first load-bearing arm includes: a first hanging plate with a first hanging hole formed thereon, a first shoulder extending obliquely downward along the bottom of the first hanging plate, a first arm extending downward from the bottom of the first shoulder in a direction parallel to the plane where the first hanging plate is located, a first inclined portion inclined downward from the bottom of the first arm and extending in a direction gradually approaching the first hanging plate, and a first shaft plate extending downward from the bottom of the first inclined portion in a direction parallel to the plane where the first hanging plate is located, and a first shaft plate is provided with a first shaft hole; The second load-bearing arm includes: a second hanging plate with a second hanging hole formed thereon, a second shoulder extending obliquely downward along the bottom of the second hanging plate, a second arm extending downward from the bottom of the second shoulder in a direction parallel to the plane where the second hanging plate is located, a second inclined portion inclined downward from the bottom of the second arm and extending in a direction gradually approaching the second hanging plate, and a second axis plate extending downward from the bottom of the second inclined portion in a direction parallel to the plane where the second hanging plate is located, and a second axis plate having a second axis hole formed therein.

2. The pulley device according to claim 1, characterized in that: The inner diameter of the second axial hole is larger than the inner diameter of the first axial hole; the main shaft includes a flange, a first axial body extending axially from one end of the flange, and a second axial body extending axially from the end of the first axial body; the flange abuts against the end face of the second axial plate, the first axial body passes through the second axial hole, and the second axial body passes through the first axial hole and the opening of the limit block.

3. The pulley device according to claim 2, characterized in that: The pair of mutually parallel limiting surfaces are formed on the second shaft body.

4. The pulley device according to claim 3, characterized in that: A mounting hole is provided on the outer end surface of the first axis plate; a stopper is fixed on the first axis plate of the first load-bearing arm by means of a screw passing through the mounting hole, and the stopper is clamped in the opening of the limit block.

5. The pulley device according to claim 4, characterized in that: The first load-bearing arm is provided with a hollow portion that passes through the first shoulder portion and the first arm portion.

6. The pulley device according to claim 5, characterized in that: The second load-bearing arm is provided with a hollow portion that passes through the second shoulder portion and the second arm portion.

7. The pulley device according to claim 6, characterized in that: The pulley comprises a circumferential portion and circumferential ribs formed on two end surface edges of the circumferential portion, the traction rope is wound around the circumferential portion, and the two circumferential ribs restrict the traction rope from being separated from the circumferential portion.

8. The pulley device according to claim 7, characterized in that: The hanging ring includes a U-shaped bottom ring hooked in the first hanging hole and the second hanging hole of the first load-bearing arm and the second load-bearing arm, and a rotating hook rotatably arranged on the U-shaped bottom ring. The U-shaped bottom ring and the rotating hook are fixed to each other by means of a locking nut.

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