Pulley assembly
By rotatably connecting the pulley bracket with the fixed bracket in the pulley assembly, and setting the load-bearing pulley and guide pulley, the problem of insufficient steering ability of the traditional pulley assembly on small arc tracks is solved, achieving more flexible arc adjustment and higher load-bearing capacity.
Patent Information
- Application Number
- CN202421315649.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-06-07
AI Technical Summary
When steering movement, traditional pulley components rely on large-arc tracks in design, resulting in an increase in track material and installation space, which is costly and cannot be effectively installed on small-arc tracks.
By rotatably connecting the first pulley bracket and the second pulley bracket with the fixed bracket, providing flexibility in the arc direction, each pulley bracket can be rotated relative to the fixed bracket during operation, increasing the steering handling capability. At the same time, load-bearing pulleys and guide pulleys are provided to improve load-bearing capacity and guide performance.
It realizes stable and smooth turning on small arc tracks, improves the steering capacity and load-bearing capacity of the pulley assembly, and reduces the construction and installation costs.
Smart Images
Figure CN222592661U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pulley assemblies, in particular to a pulley assembly. Background Art
[0002] The pulley assembly usually consists of a pulley and a bracket. The pulley is usually made of hard material and can slide on the track. The bracket is used to connect the object being carried. The pulley assembly is mainly used to help the object being carried move smoothly on the track. The role of the pulley assembly is particularly important in application scenarios such as logistics transportation, glass display windows, door and window installations, etc. Compared with other moving methods, the use of pulleys can help reduce friction and allow objects to move more smoothly.
[0003] In the related art, the multiple pulleys on the pulley assembly are generally arranged in parallel, and this arrangement can play a better role in stability and load-bearing for the path of linear motion. However, when turning movement is required, this design seems to be inadequate. Specifically, the steering ability of the pulley assembly with multiple pulleys arranged in parallel mainly depends on the track on which it travels, that is, only when the track has a sufficient curvature can the pulley assembly turn with the track. Therefore, traditional pulley assemblies are often designed with large-curvature tracks to achieve steering. However, the large-curvature track design not only requires more track materials, but also requires more installation space, which not only increases the cost of construction and installation, but also leads to the situation that the installation space of the track is limited and cannot meet the installation requirements of the large-curvature track. Utility Model Content
[0004] In view of the above problems, an embodiment of the utility model provides a pulley assembly, the pulley assembly comprising: a fixing bracket;
[0005] a first pulley bracket, the first pulley bracket being rotatably connected to the fixed bracket, and the first pulley bracket being provided with a first load-bearing pulley and a first guide pulley;
[0006] a second pulley bracket, the second pulley bracket being rotatably connected to the fixed bracket, and the second pulley bracket being provided with a second load-bearing pulley and a second guide pulley;
[0007] Wherein, the first load-bearing pulley and the second load-bearing pulley are arranged along the vertical direction, and the first guide pulley and the second guide pulley are arranged horizontally.
[0008] In one embodiment, the fixing bracket is provided with a fixing rod, and a first end of the fixing rod is rotatably connected to the first pulley bracket and the second pulley bracket.
[0009] In one embodiment, the fixing bracket includes a fan material fixing bracket and the fixing rod, the fan material fixing bracket is used to be fixedly connected to the fan material, the second end of the fixing rod is connected to the fan material fixing bracket, and the first end and the second end of the fixing rod are opposite ends of the fixing rod.
[0010] In one of the embodiments, a penetrating connecting channel is provided in the fan material fixing bracket, a screw is threadedly connected to the first end of the connecting channel, the fixing rod enters the connecting channel from the second end of the connecting channel and is pushed against by the screw, and the first end and the second end of the connecting channel are opposite ends of the connecting channel.
[0011] In one embodiment, a boss is provided on the side of the fixing rod, and the fixing rod is sequentially connected with a first connecting member, the first pulley bracket, a second connecting member and the second pulley bracket along the direction from the boss to the first end of the fixing rod, the first connecting member is used to reduce the friction between the first pulley bracket and the boss, and the second connecting member is used to reduce the friction between the second pulley bracket and the first pulley bracket.
[0012] In one embodiment, the first connecting member and the second connecting member are washers or bearings.
[0013] In one embodiment, the first pulley bracket is provided with a first protrusion and a first yielding portion, the second pulley bracket is provided with a second protrusion and a second yielding portion, the first protrusion is arranged in the second yielding portion, the second protrusion is arranged in the first yielding portion, and the first protrusion and the second protrusion are provided with through holes, and the through holes pass through the fixing rod.
[0014] In one embodiment, the first load-bearing pulley is arranged on the left and right sides of the first pulley bracket, the first guide pulley is arranged at the upper end or the lower end of the first pulley bracket, the diameter of the first guide pulley is larger than the distance between the first load-bearing pulleys on the left and right sides of the first pulley bracket, the second load-bearing pulley is arranged on the left and right sides of the second pulley bracket, the second guide pulley is arranged at the upper end or the lower end of the second pulley bracket, and the diameter of the second guide pulley is larger than the distance between the second load-bearing pulleys on the left and right sides of the second pulley bracket.
[0015] In one embodiment, the first load-bearing pulley is connected to the first pulley bracket via a first pulley fixing shaft, and the second load-bearing pulley is connected to the second pulley bracket via a second pulley fixing shaft.
[0016] In one embodiment, the first guide pulley is connected to the first pulley bracket via a first pulley fixing screw, and the second guide pulley is connected to the second pulley bracket via a second pulley fixing screw.
[0017] The above one or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
[0018] In a pulley assembly provided in an embodiment of the utility model, by rotatably connecting the first pulley bracket and the second pulley bracket to the fixed bracket, each pulley bracket can be rotated relative to the fixed bracket during operation, thereby providing flexibility in the arc direction, which greatly increases the steering processing capability of the pulley assembly, and can achieve stable and smooth turning even on a track with a small arc. At the same time, by arranging the first load-bearing pulley and the first guide pulley and the second load-bearing pulley and the second guide pulley on the first pulley bracket and the second pulley bracket respectively, since each pulley bracket is equipped with its own load-bearing pulley and guide pulley, the pulley assembly can not only withstand a larger load, but also make the pulley assembly more stable during the process of carrying objects, and the guide pulley can cooperate with the side wall of the guide rail during the operation of carrying objects to keep it on the correct path, thereby maintaining good guiding performance on the track.
[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 It is a three-dimensional schematic diagram of the overall structure in an embodiment of the utility model;
[0022] Figure 2 It is a schematic diagram of the overall structure decomposition in the embodiment of the utility model;
[0023] Figure 3 It is a right side schematic diagram of the overall structure in the embodiment of the utility model;
[0024] Figure 4It is a schematic diagram of the turning state on the track in an embodiment of the utility model.
[0025] Explanation of the reference numerals: 100, fixing bracket; 110, fixing rod; 111, boss; 120, fan material fixing bracket; 121, connecting channel; 122, screw; 200, first pulley bracket; 210, first load-bearing pulley; 220, first guide pulley; 230, first protrusion; 231, through hole; 240, first yielding portion; 300, second pulley bracket; 310, second load-bearing pulley; 320, second guide pulley; 330, second protrusion; 340, second yielding portion; 400, first connecting member; 500, second connecting member; 600, first pulley fixing shaft; 700, second pulley fixing shaft; 800, first pulley fixing screw; 900, second pulley fixing screw. DETAILED DESCRIPTION
[0026] The overall idea of the technical solution provided by the utility model is as follows:
[0027] See also Figures 1 to 4 , the pulley assembly includes: a fixed bracket 100;
[0028] A first pulley bracket 200, the first pulley bracket 200 is rotatably connected to the fixed bracket 100, and a first load-bearing pulley 210 and a first guide pulley 220 are provided on the first pulley bracket 200;
[0029] A second pulley bracket 300, the second pulley bracket 300 is rotatably connected to the fixed bracket 100, and a second load-bearing pulley 310 and a second guide pulley 320 are provided on the second pulley bracket 300;
[0030] The first load-bearing pulley 210 and the second load-bearing pulley 310 are arranged along the vertical direction, and the first guide pulley 220 and the second guide pulley 320 are arranged horizontally.
[0031] By rotatably connecting the first pulley bracket 200 and the second pulley bracket 300 to the fixed bracket 100, each pulley bracket can rotate relative to the fixed bracket 100 during operation, thereby providing flexibility in the arc direction, which greatly increases the steering processing ability of the pulley assembly, and can achieve stable and smooth turns even on a track with a small arc. Specifically, when the pulley assembly moves linearly, the first pulley bracket 200 and the second pulley bracket 300 move in parallel on the same plane. When the pulley assembly needs to turn, please refer to Figure 4The first guide pulley 220 and the second guide pulley 320 are in contact with the side wall of the track. Under the guiding action of the track, the first pulley bracket 200 can rotate relative to the second pulley bracket 300, so that the pulley assembly can smoothly turn on tracks with different curvatures, thereby improving its adaptability and movement efficiency in complex environments. For example, if the curvature of the track is small, the rotation angle of the first pulley bracket 200 to the second pulley bracket 300 will also be reduced accordingly, and vice versa. This flexible adjustment of the rotation angle enables the pulley assembly to smoothly turn on a track with a smaller curvature, thereby improving convenience and stability. When the pulley assembly completes the turn, the first pulley bracket 200 and the second pulley bracket 300 will return to their original parallel state and continue to travel in a straight line on the track.
[0032] At the same time, by arranging the first load-bearing pulley 210 and the first guide pulley 220 as well as the second load-bearing pulley 310 and the second guide pulley 320 on the first pulley bracket 200 and the second pulley bracket 300 respectively, since each pulley bracket is equipped with its own load-bearing pulley and guide pulley, the pulley assembly can not only withstand a larger load, making the pulley assembly more stable during the process of transporting objects, but also the guide pulley can cooperate with the side wall of the guide rail during the operation of transporting objects to keep it on the correct path, thereby maintaining good guiding performance on the track.
[0033] For more details, see Figure 1 and Figure 3 The first load-bearing pulley 210 and the second load-bearing pulley 310 are mainly used to bear the weight of the pulley assembly and the object being carried. In most cases, the gravity acts in the vertical direction, so the first load-bearing pulley 210 and the second load-bearing pulley 310 are vertically arranged to better bear and balance the gravity in the vertical direction. The main task of the first guide pulley 220 and the second guide pulley 320 is to keep the pulley assembly on the correct track during the sliding process and help reduce the friction between the pulley assembly and the side wall of the track, so the first guide pulley 220 and the second guide pulley 320 are horizontally arranged.
[0034] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0035] See also Figures 1 to 3The fixed bracket 100 is provided with a fixed rod 110, and the first end of the fixed rod 110 is rotatably connected to the first pulley bracket 200 and the second pulley bracket 300. Specifically, the rotatable connection design between the first end of the fixed rod 110 and the first pulley bracket 200 and the second pulley bracket 300 enables the first pulley bracket 200 and the second pulley bracket 300 to freely rotate relative to each other with the fixed rod 110 as the axis according to the condition of the track passed during the movement of the pulley assembly. The first end of the fixed rod 110 and the first pulley bracket 200 and the second pulley bracket 300 can be rotatably connected by means of a bearing connection or a hinge connection.
[0036] See also Figure 2 and Figure 3 The fixing bracket 100 includes a fan material fixing bracket 120 and a fixing rod 110. The fan material fixing bracket 120 is used to be fixedly connected to the fan material. The second end of the fixing rod 110 is connected to the fan material fixing bracket 120. The first end and the second end of the fixing rod 110 are opposite ends of the fixing rod 110. Specifically, the fan material fixing bracket 120 can fix the first pulley bracket 200 and the second pulley bracket 300 on the fan material, and the fixing rod 110 is a bridge connecting the first pulley bracket 200 and the second pulley bracket 300 with the fan material fixing bracket 120. The fan material fixing bracket 120 can be fixedly connected to the fan material by bolts, such as the fan material fixing bracket 120 is provided with a through hole for receiving bolts, and then the fan material fixing bracket 120 and the fan material are connected by bolts.
[0037] See also Figure 2The fan material fixing bracket 120 is provided with a connecting channel 121 that penetrates therethrough, and a screw 122 is threadedly connected to a first end of the connecting channel 121, and the fixing rod 110 enters the connecting channel 121 from the second end of the connecting channel 121 and is pushed against by the screw 122. The first end and the second end of the connecting channel 121 are opposite ends of the connecting channel 121. The design of the screw 122 not only provides a stable connection support for the fixing rod 110, but also realizes the accurate adjustment of the position of the fixing rod 110 relative to the connecting channel 121. Specifically, by utilizing the thread design between the screw 122 and the connecting channel 121, the depth of the screw 122 in the connecting channel 121 can be changed by rotating the screw 122, and the fixing rod 110 is pushed against by the screw 122. When the screw 122 rotates forward or backward, the fixing rod 110 will move up or down accordingly, thereby completing the adjustment of the position of the fixing rod 110 in the connecting channel 121. By adjusting the position of the fixing rod 110 in the connecting channel 121, the relative distance between the fan material fixing bracket 120 and the first pulley bracket 200 and the second pulley bracket 300 can be achieved, thereby adjusting the height of the fan material. Through the above designs, when the position of the fixing rod 110 needs to be changed, it is only necessary to rotate the screw 122 manually or using a tool, which is simple and quick.
[0038] See also Figure 2A boss 111 is provided on the side of the fixing rod 110, and the fixing rod 110 is sequentially connected with a first connecting member 400, a first pulley bracket 200, a second connecting member 500 and a second pulley bracket 300 along the direction from the boss 111 to the first end of the fixing rod 110. The first connecting member 400 is used to reduce the friction between the first pulley bracket 200 and the boss 111, and the second connecting member 500 is used to reduce the friction between the second pulley bracket 300 and the first pulley bracket 200. Specifically, the first connecting member 400, the first pulley bracket 200, the second connecting member 500, and the second pulley bracket 300 are all provided with through holes. During assembly, the fixing rod 110 passes through the through holes of each component, thereby fixing the first connecting member 400, the first pulley bracket 200, the second connecting member 500, and the second pulley bracket 300 together. The first pulley bracket 200 and the second pulley bracket 300 can rotate relative to the fixing rod 110, and the boss 111 is used to support the first connecting member 400. The setting of the first connecting member 400 and the second connecting member 500 can reduce the first pulley bracket 200 and The friction of the boss 111 and the reduction of the friction between the second pulley bracket 300 and the first pulley bracket 200 make the first pulley bracket 200 and the second pulley bracket 300 rotate more smoothly. It can be understood that the purpose of the first connecting member 400 and the second connecting member 500 is to reduce friction. Therefore, the first connecting member 400 and the second connecting member 500 can use gaskets or bearings. The gaskets can be made of plastic or silicone rubber. There are many types of bearings, such as rolling bearings and sliding bearings, which can be selected according to actual needs. Preferably, the first connecting member 400 and the second connecting member 500 are bearings.
[0039] See also Figure 1 and Figure 2 The first pulley bracket 200 is provided with a first protrusion 230 and a first yielding portion 240, and the second pulley bracket 300 is provided with a second protrusion 330 and a second yielding portion 340. The first protrusion 230 is arranged in the second yielding portion 340, and the second protrusion 330 is arranged in the first yielding portion 240. A through hole 231 is provided on the first protrusion 230 and the second protrusion 330, and the through hole 231 passes through the fixing rod 110. Specifically, the first protrusion 230 is designed to be embedded in the second yielding portion 340, and at the same time, the second protrusion 330 is designed to be embedded in the first yielding portion 240. Such a design makes the positions of the first pulley bracket 200 and the second pulley bracket 300 more compact, thereby reducing the volume of the pulley assembly. In addition, during the assembly process, the fixing rod 110 connects the first pulley bracket 200 and the second pulley bracket 300 through the through hole 231, so that they can rotate relative to the fixing rod 110 at the same time.
[0040] See also Figures 1 to 3The first load-bearing pulley 210 is arranged on the left and right sides of the first pulley bracket 200, the first guide pulley 220 is arranged at the upper end or the lower end of the first pulley bracket 200, and the diameter of the first guide pulley 220 is greater than the distance between the first load-bearing pulleys 210 on the left and right sides of the first pulley bracket 200, the second load-bearing pulley 310 is arranged on the left and right sides of the second pulley bracket 300, the second guide pulley 320 is arranged at the upper end or the lower end of the second pulley bracket 300, and the diameter of the second guide pulley 320 is greater than the distance between the second load-bearing pulleys 310 on the left and right sides of the second pulley bracket 300. Specifically, the first load-bearing pulley 210 is mainly used to bear the load. When bearing the load, the first load-bearing pulleys 210 arranged on the left and right sides of the first pulley bracket 200 can bear the load together. Compared with the pulley on only one side, the wear degree of the load-bearing pulley on one side can be reduced, thereby improving the durability of the pulley system. The diameter of the first guide pulley 220 is set larger than the distance between the first load-bearing pulleys 210 on the left and right sides of the first pulley bracket 200. When the pulley assembly approaches the side wall of the track, the first guide pulley 220 will contact the side wall, which can not only keep the pulley assembly on the correct path, but also avoid The first load-bearing pulley 210 is prevented from directly rubbing against the side wall, thereby protecting the first load-bearing pulley 210 and improving the service life of the entire pulley assembly. Similarly, a pair of second load-bearing pulleys 310 are provided on the left and right sides of the second pulley bracket 300, and a second guide pulley 320 is provided on the upper end or the lower end thereof. Similar to the first pulley bracket 200, when bearing a load, the second load-bearing pulleys 310 provided on the left and right sides of the second pulley bracket 300 can jointly bear the load, and the diameter of the second guide pulley 320 is set larger than the distance between the second load-bearing pulleys 310 on the left and right sides of the second pulley bracket 300. Please refer to Figure 3 The diameter of the second guide pulley 320 is D1, and the distance between the second load-bearing pulleys 310 on the left and right sides of the second pulley bracket 300 is D2, and D1 is greater than D2. Therefore, when the pulley assembly approaches the side wall of the track, the second guide pulley 320 will contact the side wall, which can not only keep the pulley assembly on the correct path, but also avoid the second load-bearing pulley 310 from directly rubbing against the side wall, thereby protecting the second load-bearing pulley 310 and increasing the service life of the entire pulley assembly.
[0041] See also Figure 1 and Figure 2The first load-bearing pulley 210 is connected to the first pulley bracket 200 through the first pulley fixing shaft 600, and the second load-bearing pulley 310 is connected to the second pulley bracket 300 through the second pulley fixing shaft 700. Specifically, the first pulley bracket 200 has a first pulley fixing shaft 600 for connecting the first load-bearing pulley 210, and the second pulley bracket 300 has a second pulley fixing shaft 700 for connecting the second load-bearing pulley 310. The first load-bearing pulley 210 can rotate freely with the support of the first pulley fixing shaft 600, and the second load-bearing pulley 310 can rotate freely with the support of the second pulley fixing shaft 700.
[0042] See also Figure 1 and Figure 2 , the first guide pulley 220 is connected to the first pulley bracket 200 through the first pulley fixing screw 800, and the second guide pulley 320 is connected to the second pulley bracket 300 through the second pulley fixing screw 900. Specifically, the first guide pulley 220 is fixed to the first pulley bracket 200 through the first pulley fixing screw 800, and the first pulley fixing screw 800 passes through the first guide pulley 220 and is threadedly connected to the first pulley bracket 200. Such a design allows the first guide pulley 220 to rotate freely on the first pulley bracket 200 with the first pulley fixing screw 800 as the axis, providing direction guidance and stable support for the device. Similarly, the second guide pulley 320 is also set on the second pulley bracket 300 by the second pulley fixing screw 900. The second pulley fixing screw 900 passes through the second guide pulley 320 and is threadedly connected to the second pulley bracket 300, which allows the second guide pulley 320 to rotate freely on the second pulley bracket 300 with the second pulley fixing screw 900 as the axis. This arrangement ensures that the first guide pulley 220 and the second guide pulley 320 can rotate smoothly and guide the pulley assembly to the correct direction of movement.
[0043] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.
[0044] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A pulley assembly, characterized in that: include: Fixed bracket; a first pulley bracket, the first pulley bracket being rotatably connected to the fixed bracket, and the first pulley bracket being provided with a first load-bearing pulley and a first guide pulley; a second pulley bracket, the second pulley bracket being rotatably connected to the fixed bracket, and the second pulley bracket being provided with a second load-bearing pulley and a second guide pulley; Wherein, the first load-bearing pulley and the second load-bearing pulley are arranged along the vertical direction, and the first guide pulley and the second guide pulley are arranged horizontally.
2. A pulley assembly according to claim 1, characterized in that: The fixing bracket is provided with a fixing rod, and a first end of the fixing rod is rotatably connected to the first pulley bracket and the second pulley bracket.
3. A pulley assembly according to claim 2, characterized in that: The fixing bracket includes a fan material fixing bracket and the fixing rod, the fan material fixing bracket is used to be fixedly connected to the fan material, the second end of the fixing rod is connected to the fan material fixing bracket, and the first end and the second end of the fixing rod are opposite ends of the fixing rod.
4. A pulley assembly according to claim 3, characterized in that: A penetrating connecting channel is provided in the fan material fixing bracket, a first end of the connecting channel is threadedly connected with a screw, the fixing rod enters the connecting channel from the second end of the connecting channel and is pushed against by the screw, and the first end and the second end of the connecting channel are opposite ends of the connecting channel.
5. A pulley assembly according to claim 2, characterized in that: A boss is provided on the side of the fixing rod, and the fixing rod is sequentially connected with a first connecting member, the first pulley bracket, a second connecting member and the second pulley bracket along the direction from the boss to the first end of the fixing rod, the first connecting member is used to reduce the friction between the first pulley bracket and the boss, and the second connecting member is used to reduce the friction between the second pulley bracket and the first pulley bracket.
6. A pulley assembly according to claim 5, characterized in that: The first connecting member and the second connecting member are washers or bearings.
7. A pulley assembly according to claim 2, characterized in that: The first pulley bracket is provided with a first protrusion and a first yielding portion, the second pulley bracket is provided with a second protrusion and a second yielding portion, the first protrusion is arranged in the second yielding portion, the second protrusion is arranged in the first yielding portion, the first protrusion and the second protrusion are provided with through holes, and the through holes pass through the fixing rod.
8. A pulley assembly according to claim 1, characterized in that: The first load-bearing pulley is arranged on the left and right sides of the first pulley bracket, the first guide pulley is arranged on the upper end or the lower end of the first pulley bracket, the diameter of the first guide pulley is larger than the distance between the first load-bearing pulleys on the left and right sides of the first pulley bracket, the second load-bearing pulley is arranged on the left and right sides of the second pulley bracket, the second guide pulley is arranged on the upper end or the lower end of the second pulley bracket, and the diameter of the second guide pulley is larger than the distance between the second load-bearing pulleys on the left and right sides of the second pulley bracket.
9. A pulley assembly according to claim 1, characterized in that: The first load-bearing pulley is connected to the first pulley bracket via a first pulley fixing shaft, and the second load-bearing pulley is connected to the second pulley bracket via a second pulley fixing shaft.
10. A pulley assembly according to claim 1, characterized in that: The first guide pulley is connected to the first pulley bracket via a first pulley fixing screw, and the second guide pulley is connected to the second pulley bracket via a second pulley fixing screw.