Skyrail pulley

Abstract

The present invention relates to a pulley for an overhead rail, comprising a car body, a running assembly and a parking part; the car body is hollow, and side walls are arranged on opposite sides, and an opening structure is formed between the two side walls; the running assembly is arranged in the car body, and can drive the car body to move along the track; the parking part is also arranged in the car body, and can limit the movement of the car body along the track. Among them, the parking parts are all built into the car body, which effectively improves the utilization rate of space. Moreover, the car body can effectively protect the running assembly and the parking part, thereby increasing the service life of the running assembly and the parking part. The parking part can limit the movement of the car body along the track in the track section where it is difficult to park, so that the operating equipment suspended under the car body can keep the position unchanged for a long time, improve the safety of the operation, improve the hand-to-hand rate, and reduce the risk of collision between pulleys. At the same time, the parked car body can assist the cable in steering, and improve the regularity of the cable. On the whole, the functions of the pulley are effectively increased.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to a pulley for an overhead rail. Background Art

[0002] Above the working area of ​​many workshops, there is usually a ceiling rail hanging, on which a pulley is provided, which can slide along the ceiling rail. Under the pulley, working equipment can be hung, so that the operator can transfer the position of the working equipment. The pulley can also fix the cables set along the direction of the ceiling rail, so that the cables are erected in the air, which improves the regularity and service life of the cables and improves the safety of operation.

[0003] However, the traditional overhead rail pulleys have fewer functions and cannot meet actual production needs. Summary of the invention

[0004] In order to solve the problem that the traditional overhead rail pulley has few functions and cannot meet the actual production needs, the present invention provides a overhead rail pulley.

[0005] To achieve the purpose of the present invention, a pulley for an overhead rail is provided, comprising a vehicle body, a traveling assembly and a parking portion;

[0006] The vehicle body is hollow, with side walls arranged on two opposite sides, and an opening structure between the two side walls;

[0007] The traveling assembly is arranged in the vehicle body and can drive the vehicle body to move along the track;

[0008] The parking part is also arranged in the vehicle body, and can limit the movement of the vehicle body along the track.

[0009] In one specific embodiment, an adjustment hole is provided on the inner side surfaces of the two side walls, and the two adjustment holes are arranged opposite to each other;

[0010] There are two stop parts, both of which are long strip structures; one end of one of the stop parts is fixed in one of the adjustment holes, and one end of the other is fixed in the other adjustment hole, and the other ends of the two stop parts can extend toward the adjustment holes on the opposite side and rest on the track.

[0011] In one specific embodiment, the adjustment hole is opened in the middle of the inner side of the side wall and has a preset depth.

[0012] In one specific embodiment, anti-collision blocks are provided at both ends of each side wall.

[0013] In one specific embodiment, the travel assembly includes a main travel wheel, a first auxiliary travel wheel, and a second auxiliary travel wheel;

[0014] There are two pairs of main running wheels, and the two pairs of main running wheels are respectively arranged near the two ends of the side walls; one main running wheel in each pair of main running wheels is rotatably connected to the upper part of the inner side surface of one side wall, and the other main running wheel is rotatably connected to the upper part of the inner side surface of the other side wall; the two main running wheels in each pair of main running wheels are arranged opposite to each other, and the axes are perpendicular to the side walls;

[0015] There are two pairs of first auxiliary running wheels, and the two pairs of first auxiliary running wheels are respectively arranged near the two ends of the side walls; one first auxiliary running wheel in each pair of first auxiliary running wheels is rotatably connected to the lower part of the inner side surface of one side wall, and the other is rotatably connected to the lower part of the inner side surface of the other side wall; the two first auxiliary running wheels in each pair of first auxiliary running wheels are arranged opposite to each other, and the axes are parallel to the side walls;

[0016] The second auxiliary running wheels are a pair and are arranged in the middle of the side wall; one of the second auxiliary running wheels is rotatably connected to the upper part of the inner side surface of one side wall, and the other is rotatably connected to the upper part of the inner side surface of the other side wall; the two second auxiliary running wheels are arranged opposite to each other, and the axes are parallel to the side walls.

[0017] In one of the specific embodiments, the vehicle body includes a first clamping portion and a second clamping portion;

[0018] The first clamping part and the second clamping part are arranged opposite to each other, the upper part is a side wall, and the lower part is buckled.

[0019] In one of the specific embodiments, a first clamping groove is provided at the bottom of the vehicle body;

[0020] Also includes lifting rings;

[0021] A wire hole with a preset aperture is provided in the middle of the hanging ring, a second clamping groove is provided at the bottom, and a clamping block is provided at the top; the clamping block is adapted to the first clamping groove and can be clamped in the first clamping groove.

[0022] In one specific embodiment, a plurality of insertion holes are provided on the wall of the wire hole;

[0023] A gasket with a preset thickness is arranged in the wire hole; the gasket is an arc-shaped structure, and a plurality of raised blocks are arranged on the raised surface; the raised blocks are matched with the jacks and correspond one to one; the hole wall and the raised surface of the gasket are fixedly connected by the raised blocks and the jacks.

[0024] In one specific embodiment, the hanging ring includes a first buckling portion and a second buckling portion;

[0025] A clamping block is provided on the upper part of the first buckling part;

[0026] The upper part of the second buckling part is rotatably connected to the upper part of the first buckling part, and the upper part and the middle part of the first buckling part are raised backwards to form a wire passing hole, and the lower part can be fixedly connected to the lower part of the first buckling part.

[0027] In one specific embodiment, a chain hole is provided at the bottom of the vehicle body for the protection chain to pass through.

[0028] Beneficial effects of the present invention: The overhead rail pulley of the present invention is provided with a traveling assembly, and the traveling assembly can move along the direction of the track to drive the car body to move along the track, so that the working equipment suspended under the car body can move along the track, so that the working equipment can move with the operator, effectively improving the hand-to-hand rate and reducing the difficulty of operation. In addition, the car body can also be used to fix cables, improve the regularity of the cables, reduce the space occupied by the cables, and is conducive to the overall layout of the wiring harness in the workshop. At the same time, it effectively avoids the operator from contacting the cables, and improves the service life of the cables and the safety of operation. Among them, the traveling assembly and the parking part are both built into the car body, which effectively improves the utilization rate of the space. In addition, the car body can effectively protect the traveling assembly and the parking part, thereby improving the service life of the traveling assembly and the parking part. The parking part can limit the movement of the car body along the track in the track section where it is difficult to park, so that the working equipment suspended under the car body can keep the position unchanged for a long time, improve the safety of the operation, improve the hand-to-hand rate, and reduce the risk of collision between the pulleys. At the same time, the parked car body can assist the cable in steering, improving the regularity of the cable. On the whole, the functions of the pulley are effectively increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a specific embodiment of a pulley for a ceiling rail of the present invention;

[0030] Figure 2 yes Figure 1 A schematic diagram of the disassembled structure of the body and the travel assembly of the overhead rail pulley shown;

[0031] Figure 3 yes Figure 1 Schematic diagram of the use status of the overhead rail pulley shown. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axis", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "join", "hinge", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Reference Figure 1 , Figure 2 and Figure 3 As a specific embodiment of the present invention, the overhead rail pulley includes a vehicle body 110, a travel assembly 120 and a parking portion. The vehicle body 110 is a hollow structure, with side walls arranged on opposite sides, and an opening structure between the two side walls. The travel assembly 120 is arranged in the vehicle body 110, and can drive the vehicle body 110 to move along the track 200. The parking portion is also arranged in the vehicle body 110, and can limit the movement of the vehicle body 110 along the track 200.

[0038] In this embodiment, when the car body 110 is installed on the track 200, the two side walls are respectively located on both sides of the track 200, and there is an opening structure between the two side walls, so that the car body 110 can be engaged with the track 200 from the bottom of the track 200. The walking assembly 120 can move along the track 200 to drive the car body 110 to move along the track 200, so that the working equipment suspended under the car body 110 can move along the track 200, so that the working equipment can move with the operator, effectively improving the hand-to-hand rate and reducing the difficulty of operation. In addition, the car body 110 can also be used to fix the cable 400, improve the regularity of the cable 400, reduce the space occupied by the cable 400, and facilitate the overall layout of the wiring harness in the workshop. At the same time, it effectively avoids the operator from contacting the cable 400, and improves the service life of the cable 400 and the safety of operation. Among them, the walking assembly 120 and the parking part are both built into the car body 110, which effectively improves the utilization rate of the space. Moreover, the vehicle body 110 can effectively protect the traveling assembly 120 and the parking part, thereby increasing the service life of the traveling assembly 120 and the parking part. It should be noted that the cross section of the track 200 is an "I"-shaped structure. When the vehicle body 110 is engaged with the track 200 from the bottom of the track 200, the traveling assembly 120 is located in the grooves on both sides of the track 200, which can support the vehicle body 110, effectively preventing the vehicle body 110 from falling off the track 200, and improving the safety of the operation. Since there may be a height difference in a part of the track 200, it is difficult for the pulley to stop on the local track 200. The parking part can limit the movement of the vehicle body 110 along the track 200 in the section of the track 200 where it is difficult to stop, so that the working equipment suspended under the vehicle body 110 can keep the position unchanged for a long time, improve the safety of the operation, improve the hand-side rate, and reduce the risk of collision between pulleys. At the same time, the parked vehicle body 110 can assist the cable 400 in turning, improving the regularity of the cable 400. On the whole, the functions of the pulley are effectively increased.

[0039] In a specific embodiment of the present invention, an adjustment hole 1111 is provided on the inner side of each of the two side walls, and the two adjustment holes 1111 are arranged opposite to each other. There are two stop parts, both of which are long strip structures, one end of one of the stop parts is fixed in one of the adjustment holes 1111, and one end of the other is fixed in the other adjustment hole 1111. Specifically, the adjustment hole is a pre-buried hole, and the stop part is a screw, and the external thread of the screw can be screwed with the internal thread in the pre-buried hole. The other ends of the two stop parts can extend toward the adjustment hole 1111 on the opposite side and abut against the track 200, that is, the other ends of the two stop parts can respectively abut against the two sides of the web of the track 200 with an "I"-shaped cross-section. In this way, the stability of the position of the car body 110 when it is parked is greatly improved. Moreover, the adjustment hole 1111 is opened in the middle of the inner side of the side wall, so that when the car body 110 is parked, the two side walls are evenly stressed, further improving the stability of the position of the car body 110 when it is parked. The depth of the adjustment hole 1111 is a preset depth, and the length of the stop portion screwed into the adjustment hole 1111 is adjusted to expand or shorten the distance between the adjacent ends of the two stop portions, thereby allowing the pulley to slide along the track 200 or stop on the track 200 more smoothly.

[0040] In a specific embodiment of the present invention, anti-collision blocks 1121 are provided at both ends of each side wall. The anti-collision blocks 1121 have a buffering function. When two adjacent pulleys collide on the track 200, the anti-collision blocks 1121 can reduce the damage to the side wall caused by the collision, thereby reducing the damage to the pulley caused by the collision, effectively extending the service life of the pulley, and at the same time, further increasing the function of the pulley.

[0041] In a specific embodiment of the present invention, the walking assembly 120 includes a main walking wheel 121, a first auxiliary walking wheel 122 and a second auxiliary walking wheel 123. Among them, the main walking wheels 121 are two pairs, and the two pairs of main walking wheels 121 are respectively arranged near the two ends of the side wall. One main walking wheel 121 in each pair of main walking wheels 121 is rotatably connected to the upper part of the inner side surface of one side wall through a rotating shaft and a bearing, and the other is rotatably connected to the upper part of the inner side surface of another side wall through a rotating shaft and a bearing. The two main walking wheels 121 in each pair of main walking wheels 121 are arranged opposite to each other, and the axis lines are perpendicular to the side wall. It should be noted that when the vehicle body 110 is engaged with the track 200 with a "I"-shaped cross-section from the bottom of the track 200, the two main walking wheels 121 in each pair of main walking wheels 121 are respectively located on both sides of the web of the track 200, and are both located on the top surface of the bottom wing plate. In this way, each walking wheel is subjected to a relatively uniform force, thereby effectively improving the stability of the main walking wheel 121 when rolling. Among them, there are two pairs of first auxiliary running wheels 122, and the two pairs of first auxiliary running wheels 122 are respectively arranged near the two ends of the side wall. One first auxiliary running wheel 122 in each pair of first auxiliary running wheels 122 is rotatably connected to the lower part of the inner side surface of one side wall through a rotating shaft and a bearing, and the other is rotatably connected to the lower part of the inner side surface of another side wall through a rotating shaft and a bearing. The two first auxiliary running wheels 122 in each pair of first auxiliary running wheels 122 are arranged opposite to each other, and the axis lines are parallel to the side wall. It should be noted that when the vehicle body 110 is engaged with the track 200 with a cross-section of an "I"-shaped structure from the bottom of the track 200, the two first auxiliary running wheels 122 in each pair of first auxiliary running wheels 122 are respectively located on both sides of the bottom wing plate of the track 200. In this way, the smoothness and movement efficiency during sliding movement are effectively improved, thereby improving the working efficiency. Among them, the second auxiliary running wheels 123 are a pair, which are arranged in the middle of the side wall. One of the second auxiliary running wheels 123 is rotatably connected to the upper portion of the inner side surface of one side wall, and the other is rotatably connected to the upper portion of the inner side surface of the other side wall. The two second auxiliary running wheels 123 are arranged opposite to each other, and the axes are parallel to the side walls. When the vehicle body 110 engages with the track 200 with an I-shaped cross-section from the bottom of the track 200, the two second auxiliary running wheels 123 in each pair of second auxiliary running wheels 123 are respectively located on both sides of the web of the track 200. In this way, the smoothness and movement efficiency during sliding movement are further effectively improved.

[0042] In a specific embodiment of the present invention, the vehicle body 110 includes a first clamping portion 111 and a second clamping portion 112. The first clamping portion 111 and the second clamping portion 112 are arranged opposite to each other, the upper portion of the first clamping portion 111 is a side wall of the vehicle body 110, and the upper portion of the second clamping portion 112 is another side wall of the vehicle body 110. The lower portions of the first clamping portion 111 and the second clamping portion 112 are buckled. The vehicle body 110 is split as a whole into two parts, the first clamping portion 111 and the second clamping portion 112, and they are manufactured separately, which reduces the manufacturing difficulty and improves the manufacturing efficiency.

[0043] In a specific embodiment of the present invention, a first clamping groove is provided at the bottom of the vehicle body 110. The pulley also includes a lifting ring 130, and a wire hole 1311 with a preset aperture is provided in the middle of the lifting ring 130. The wire hole 1311 can be used for the cable 400 to pass through or the fixing rod to pass through. Among them, an operating device is suspended below the fixing rod. Specifically, the preset aperture is 10-30mm, which is suitable for cables 400 and fixing rods of various specifications to pass through, effectively improving the versatility of the lifting ring 130. A second clamping groove is provided at the bottom of the lifting ring 130, and the next lifting ring 130 can be connected through the second clamping groove, so that more lifting rings 130 can be suspended below the vehicle body 110, and multiple lifting rings 130 can be used for multiple purposes, further increasing the function of the pulley. A clamping block is provided at the top of the lifting ring 130, and the clamping block is adapted to the first clamping groove and can be clamped in the first clamping groove so that the lifting ring 130 can rotate flexibly. In this way, when the cable 400 passes through the cable hole 1311 , the eye 130 can rotate freely, thereby reducing the damage of the eye 130 to the cable 400 .

[0044] In a specific embodiment of the present invention, a plurality of insertion holes are provided in the hole wall of the wire hole 1311, and a gasket of a preset thickness is provided in the wire hole 1311. The wire hole 1311 is a circular hole, and the gasket is an arc-shaped structure. A plurality of raised blocks are provided on the raised surface of the gasket, and the raised blocks are adapted to the insertion holes and correspond one to one. The raised blocks and the insertion holes are used to fix the connection between the hole wall and the raised surface of the gasket. In this way, the aperture of the wire hole 1311 can be changed conveniently and quickly by the gasket. In addition, the plurality of raised blocks cooperate with the plurality of insertion holes to effectively improve the stability of the connection between the gasket and the hole wall.

[0045] In a specific embodiment of the present invention, the lifting ring 130 includes a first buckling portion 131 and a second buckling portion 132, and a clamping block is provided on the upper portion of the first buckling portion 131. The first buckling portion 131 and the vehicle body 110 can be rotatably connected through the clamping block and the first clamping groove. The upper portion of the second buckling portion 132 is rotatably connected to the upper portion of the first buckling portion 131, and the upper portion and the middle portion of the first buckling portion 131 are raised in reverse to form a wire hole 1311. In this way, the second buckling portion 132 is rotated so that the extension direction of the second buckling portion 132 and the first buckling portion 131 form a preset angle, thereby facilitating the installation, use, and disassembly and replacement of the gasket. The lower portion of the second buckling portion 132 can be fixedly connected to the lower portion of the first buckling portion 131. Specifically, a first mounting hole is provided at the lower part of the second buckle part 132 and the lower part of the first buckle part 131, and a bolt can be used to fix the lower part of the second buckle part 132 and the first buckle part 131 through the first mounting hole. A second mounting hole is provided at the middle part of the second buckle part 132 and the middle part of the first buckle part 131, and a bolt can be used to fix the middle part of the second buckle part 132 and the first buckle part 131 through the second mounting hole. By adjusting the distance between the middle part of the first buckle part 131 and the second buckle part 132 and the distance between the lower part of the first buckle part 131 and the second buckle part 132, the clamping block of the next hanging ring 130 can be clamped in the second groove, thereby facilitating the installation of the next hanging ring 130.

[0046] In a specific embodiment of the present invention, a chain hole is provided at the bottom of the vehicle body 110 for the protection chain 300 to pass through. It should be noted that the direction of the protection chain 300 is consistent with the direction of the track 200, and can pass through the chain hole at the bottom of the vehicle body 110 of each pulley on the track 200. In this way, when the vehicle body 110 falls off the track 200, the protection chain 300 can prevent the vehicle body 110 from continuing to fall, thereby improving the safety of the operation.

[0047] In a specific embodiment of the present invention, both side walls of the vehicle body 110 are square structures. The spacing between the adjacent end faces of the two main running wheels 121 of each pair of main running wheels 121 is 7-9mm. The spacing between the two pairs of main running wheels 121 is 50-70mm, the distance between the two ends of each side wall is 90-110mm, and the distance between the top end face and the bottom end face of the vehicle body 110 is 80-90mm. In this way, when the vehicle body 110 is subjected to force, the force is more uniform, which improves the stability of the vehicle body 110 when moving, and thus improves the safety of operation. Among them, the material of the vehicle body 110, the running assembly 120 and the lifting ring 130 is nylon, which is light in weight, realizing the lightweight design of the pulley. Moreover, nylon has good wear resistance, impact resistance and tensile resistance, and a long service life. The material of the parking part is copper, which is not easy to corrode and has high rigidity.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", "one specific embodiment" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and the inventive concept of the present invention within the scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pulley for a ceiling rail, characterized in that: include: Car body, running components and parking parts; The vehicle body is hollow, and side walls are arranged on two opposite sides, and an opening structure is formed between the two side walls; the walking assembly is arranged in the vehicle body, and can drive the vehicle body to move along the track; The parking part is also arranged in the vehicle body and can limit the movement of the vehicle body along the track; An adjustment hole is provided on the inner side surfaces of the two side walls, and the two adjustment holes are arranged opposite to each other; There are two stop parts, both of which are long strip structures; one end of one of the stop parts is fixed in one of the adjustment holes, and one end of the other stop part is fixed in the other adjustment hole, and the other ends of the two stop parts can extend toward the adjustment holes on the opposite side and abut against the track; Both ends of each of the side walls are provided with anti-collision blocks; The travel assembly comprises a main travel wheel, a first auxiliary travel wheel and a second auxiliary travel wheel; There are two pairs of main running wheels, and the two pairs of main running wheels are respectively arranged near the two ends of the side walls; one of the main running wheels in each pair is rotatably connected to the upper part of the inner side surface of one of the side walls, and the other is rotatably connected to the upper part of the inner side surface of the other side wall; the two main running wheels in each pair of main running wheels are arranged opposite to each other, and the axes are perpendicular to the side walls; There are two pairs of the first auxiliary running wheels, and the two pairs of the first auxiliary running wheels are respectively arranged near the two ends of the side wall; one of the first auxiliary running wheels in each pair is rotatably connected to the lower part of the inner side surface of one of the side walls, and the other is rotatably connected to the lower part of the inner side surface of the other side wall; the two first auxiliary running wheels in each pair of the first auxiliary running wheels are arranged opposite to each other, and the axes are parallel to the side walls; The second auxiliary running wheels are a pair, and are arranged in the middle of the side wall; one of the second auxiliary running wheels is rotatably connected to the upper part of the inner side surface of one of the side walls, and the other is rotatably connected to the upper part of the inner side surface of the other side wall; the two second auxiliary running wheels are arranged opposite to each other, and the axes are parallel to the side wall; The bottom of the vehicle body is provided with a first clamping groove; The overhead rail pulley also includes a lifting ring; A wire hole with a preset aperture is provided in the middle of the lifting ring, a second clamping groove is provided at the bottom, and a clamping block is provided at the top; the clamping block is adapted to the first clamping groove and can be clamped in the first clamping groove; the wire hole can allow a fixing rod to pass through; an operating device is hung below the fixing rod; the next lifting ring can be connected through the second clamping groove, so that more lifting rings can be suspended below the vehicle body; The hole wall of the wire hole is provided with a plurality of plug holes; A gasket of preset thickness is arranged in the wire hole; the gasket is an arc-shaped structure, and a plurality of raised blocks are arranged on the raised surface; the raised blocks are adapted to the sockets and correspond one to one; the hole wall and the raised surface of the gasket are fixedly connected by the raised blocks and the sockets; The hanging ring includes a first buckling portion and a second buckling portion; The upper part of the first buckling part is provided with the clamping block; The upper portion of the second buckling portion is rotatably connected to the upper portion of the first buckling portion, and the upper portion and the middle portion of the first buckling portion are raised backwards to form the wire passing hole, and the lower portion can be fixedly connected to the lower portion of the first buckling portion; A chain hole for a protection chain to pass through is provided at the bottom of the vehicle body.

2. The overhead rail pulley according to claim 1, characterized in that: The adjustment hole is opened in the middle of the inner side surface of the side wall and has a preset depth.

3. The overhead rail pulley according to claim 1, characterized in that: The vehicle body comprises a first clamping portion and a second clamping portion; The first clamping part and the second clamping part are arranged opposite to each other, the upper part is the side wall, and the lower part is buckled.

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