Multi-groove pulley
By introducing rolling bearings and sliding bearings into the multi-rope groove pulley system, multiple pulley singles are independently connected, which solves the problem of mutual interference during rope penetration and adjustment, improves installation efficiency and tension adjustment accuracy, extends the rope life and reduces the difficulty of processing.
Patent Information
- Application Number
- CN202421477285.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The existing multi-rope groove pulleys have mutual interference when the rope is penetrated and adjusted, resulting in low installation efficiency, inconvenient tension adjustment, and defects during processing will lead to the scrapping of the entire pulley.
In the same pulley system, the rolling bearing is used for large load rotation, and the sliding bearing is used for rope penetration and tension adjustment. Multiple pulley singles are connected through independent second bearings to achieve convenient winding and independent tension adjustment of the rope.
It improves the accuracy of rope installation efficiency and tension adjustment, extends the service life of rope, reduces processing difficulty and cost, and improves the yield rate.
Smart Images
Figure CN222833923U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of elevator pulleys, in particular to a multi-groove pulley. Background Art
[0002] As a key equipment for lifting and lowering heavy objects, elevators are widely used in elevators, mining hoists, and gravity energy storage systems. Common elevators include traction type, winding type, and jacking type. Traction type and winding type require ropes (such as wire ropes, chains, steel belts, etc.) as core parts for lifting heavy objects. The selection of ropes is closely related to the weight of the object being lifted, and there are corresponding safety factor standards for different industries and scenarios. When lifting large-tonnage heavy objects, high requirements are placed on the ropes. The commonly used solution is to thicken the ropes or use multiple ropes in parallel for lifting and lowering.
[0003] Ropes often need to be reversed at the top or bottom through pulleys to achieve flexible arrangement of traction devices, elevators, counterweights and other components. When thickening the rope, the pulley diameter needs to be increased simultaneously, which brings difficulties in arrangement. Therefore, in elevators, mining hoists, and hoists of gravity energy storage systems, multiple ropes are often required to be hoisted synchronously, thereby reducing the load on a single rope without increasing the pulley diameter. At this time, the pulley is generally designed as a multi-groove structure.
[0004] Most of the existing multi-rope groove pulleys are integrally formed, and the rope grooves rotate synchronously, which makes it easy to assemble the pulley body. However, there are also defects. For example, multiple rope grooves will affect each other during the rope threading and winding operation, which reduces the system installation efficiency; the tension cannot be adjusted independently during debugging and use, and the consistency of the rope service life is poor; during the processing process, any defect in any of the multiple rope grooves will cause the entire pulley to be scrapped;
[0005] Another existing multi-rope pulley solution is that multiple independent pulleys are installed on the same shaft through their own rolling bearings. This solves the problem of interference between rope threading and adjustment, but it also has defects, such as the large workload and high cost of installing and maintaining multiple rolling bearings. Utility Model Content
[0006] The purpose of the utility model is to provide a multi-groove pulley, which introduces two kinds of bearings in the same pulley system, one for realizing rotation and the other for convenient processing and debugging, and connects multiple pulleys with independent rope grooves in parallel, thereby realizing convenient threading and winding of ropes and independent tension adjustment at low cost, greatly improving installation and debugging efficiency and rope life consistency.
[0007] The above technical objectives of the utility model are achieved through the following technical solutions:
[0008] A multi-groove pulley comprises a pulley shaft, first bearings are respectively arranged at both ends of the pulley shaft, and the pulley shaft is rotatably connected to a bearing seat via the first bearings; a plurality of second bearings are arranged on the pulley shaft, and corresponding pulley monomers are rotatably connected to the pulley block via the second bearings; the resistance of the second bearings during rotation is greater than that of the first bearings.
[0009] By adopting the above technical solution, the pulley block connects multiple pulley units through an independent second bearing, which facilitates solving the problem of rope threading and adjustment interference. During rotation, since the resistance of the second bearing during rotation is greater than that of the first bearing, rotation is achieved through the first bearing. Multiple ropes will drive multiple pulley units, the second bearing, and the pulley shaft to rotate as a whole through the first bearing, thereby achieving efficient operation under large loads.
[0010] Furthermore, the first bearing is a rolling bearing.
[0011] By adopting the above technical solution, the rolling bearing is used for large load lifting conditions. When rotating, it can drive multiple pulley units, the second bearing, and the pulley shaft as a whole, and realize efficient operation under large loads through the rotation of the rolling bearing.
[0012] Furthermore, the first bearing is a spherical roller bearing with self-aligning capability.
[0013] By adopting the above technical solution, the large-span flexible deformation caused by installing multiple pulleys in parallel can be absorbed.
[0014] Furthermore, the second bearing is a sliding bearing.
[0015] By adopting the above technical solution, the sliding bearing is used for rope threading and tension adjustment, so that the previously installed rope will not hinder the subsequent threading and winding work during rope threading; when adjusting the tension, the dislocation movement of each rope is released through the pulley monomer and the sliding bearing, and the tension is effectively adjusted.
[0016] Furthermore, the sliding bearing is a self-lubricating bearing.
[0017] By adopting the above technical solution, the sliding bearing part is free of grease and maintenance-free, and the grease of the second bearing is prevented from falling on the rope, which seriously reduces the traction capacity of the traction hoist.
[0018] Furthermore, shaft end retaining rings are sleeved on both ends of the pulley shaft, the first bearing is located on the outside of the shaft end retaining ring, and the second bearing is located on the inside of the shaft end retaining ring.
[0019] By adopting the above technical solution, the shaft end retaining ring separates the first bearing and the second bearing to achieve their different functions.
[0020] Furthermore, shaft shoulders are provided at both ends of the pulley shaft, and shaft end retaining rings abut against outer ends of the shaft shoulders.
[0021] By adopting the above technical solution, the installation position of the shaft end retaining ring is located.
[0022] Furthermore, a wheel spacer is provided between adjacent second bearings and / or pulley units.
[0023] By adopting the above technical solution, adjacent pulley units are separated to facilitate their relatively independent rotation process.
[0024] In summary, the utility model has the following beneficial effects:
[0025] 1. Realize independent installation of parallel ropes, solve the problem of mutual interference between threading and winding, and improve the installation efficiency of ropes;
[0026] During the threading process, the pulley will rotate due to the movement of the rope; for the traditional one-piece multi-rope groove pulley, except for the first rope, the subsequent threading and winding work at the pulley will be interfered by the friction resistance torque of the previously threaded rope; the multiple pulleys used in the present invention are respectively installed side by side through sliding bearings, and the pulleys are independent of each other and rotate freely at low speed, which solves the problem of mutual interference in threading and winding.
[0027] 2. Realize independent tension adjustment of each parallel rope, solve the problem of mutual interference in tension adjustment, and improve the consistency of rope life;
[0028] After the ropes are installed, the tension of each rope needs to be adjusted. Since each rope has a certain tension, when adjusting the tension of a single rope, the rope being adjusted at the pulley will tend to move relative to the other ropes. At this time, conflicting torques will be generated in the traditional one-piece multi-rope groove pulley, and the ropes will interfere with each other when adjusting the tension.
[0029] The multiple pulleys used in the present invention are installed through sliding bearings respectively. At low speed, each pulley is independent of each other and rotates freely, which solves the problem of mutual interference between threading and winding. Mutual interference between rope tensions is avoided, and the tension adjustment of each rope is relatively easier and more accurate; the tension difference between ropes is smaller, the ropes are more evenly stressed, and the life of the ropes will be more consistent.
[0030] 3. Reduce processing difficulty and improve yield rate;
[0031] The scheme of the present invention adopts low-cost sliding bearings to install multiple pulleys with independent rope grooves on the same shaft; each pulley is short in length and small in size, and is easy to process; even if a certain pulley has a processing problem, only this pulley needs to be discarded. Compared with an integrally formed multi-rope groove pulley, once a processing problem occurs, the entire multi-rope groove pulley needs to be scrapped, which greatly increases the processing fault tolerance margin of the pulley and improves the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0033] Figure 1 This is a schematic diagram of the installation of a multi-groove pulley and a rope of the utility model;
[0034] Figure 2 It is a schematic diagram of the overall structure of a multi-groove pulley of the utility model;
[0035] Figure 3 This is a cross-sectional view of the internal structure of a multi-groove pulley of the utility model;
[0036] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of part I.
[0037] In the figure, 1, pulley shaft; 2, bearing seat; 3, rolling bearing; 4, shaft end retaining ring; 5, pulley unit; 6, sliding bearing; 7, wheel spacer. DETAILED DESCRIPTION
[0038] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings, and this embodiment does not constitute a limitation of the utility model. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0039] A multi-groove pulley, such as Figure 1 and Figure 2 As shown, the multi-groove pulley is used at the top or bottom of the elevator system where the rope b needs to be reversed, so as to achieve flexible arrangement of components such as traction devices, elevators, counterweights, etc. Rope b is arranged on the multi-groove pulley group a as shown in the figure.
[0040] like Figure 3 and Figure 4As shown, the multi-groove pulley block a comprises a pulley shaft 1, and first bearings are respectively provided at both ends of the pulley shaft 1, and the pulley shaft 1 is rotatably connected to the bearing seat 2 through the first bearings; a plurality of second bearings are provided on the pulley shaft 1, and the pulley block is rotatably connected to the corresponding pulley monomers 5 through the second bearings; the resistance of the second bearings during rotation is greater than that of the first bearings;
[0041] During rotation, since the resistance of the second bearing during rotation is greater than that of the first bearing, rotation is achieved through the first bearing, and multiple ropes will drive multiple pulley units 5, the second bearing, and the pulley shaft 1 to rotate as a whole through the first bearing, achieving efficient operation under large loads.
[0042] like Figure 4 As shown, the first bearing is a rolling bearing 3, which realizes efficient operation under large loads. In this embodiment, the first bearing is a spherical roller bearing with self-aligning ability, which can absorb the large-span flexible deformation caused by the parallel installation of multiple pulleys.
[0043] like Figure 4 As shown, the second bearing is a sliding bearing 6, which is used for rope threading and tension adjustment, so that the rope installed in the previous order will not hinder the subsequent threading and winding work during rope threading; when the tension is adjusted, the misaligned movement of each rope is released through the pulley monomer 5 and the sliding bearing 6, and the tension is effectively adjusted;
[0044] In this embodiment, the sliding bearing 6 is a self-lubricating bearing, so that the sliding bearing 6 is partially grease-free and maintenance-free, thereby preventing the lubricating grease of the second bearing from falling onto the rope, which would seriously reduce the traction capacity of the traction hoist.
[0045] like Figure 4 As shown, shaft end retaining rings 4 are sleeved at both ends of the pulley shaft 1, the first bearing is located on the outside of the shaft end retaining ring 4, and the second bearing is located on the inside of the shaft end retaining ring 4; wherein the diameters of the two ends of the pulley shaft 1 are smaller than the middle part, and a stepped shoulder is formed at the boundary position, the cross section of the shaft end retaining ring 4 is "Z" shaped, and the stepped surface of the inner ring abuts against the outer end of the shoulder of the pulley shaft 1;
[0046] A wheel spacer 7 is provided between adjacent sliding bearings 6 and pulley units 5. After installing one sliding bearing 6 and pulley unit 5, a wheel spacer 7 is installed on the pulley shaft 1, and then the next sliding bearing 6 and pulley unit 5 are installed. The two end positions are positioned by corresponding shaft end retaining rings 4 to separate adjacent pulley units 5 and locate the position of each pulley unit 5.
[0047] Working principle:
[0048] Multiple pulley units 5 can rotate independently through the sliding bearings 6, and are used for rope threading and tension adjustment. When the tension is adjusted, the misaligned movement of each rope is released through the pulley units 5 and the sliding bearings 6, and the tension is effectively adjusted;
[0049] When the elevator (hoisting weight) is lifted at high speed and with heavy load, the resistance of the sliding bearing 6 is significantly greater than that of the rolling bearing 3. The multiple ropes b will drive the multiple pulley units 5, the sliding bearings 6, and the pulley shaft 1 to rotate as a whole through the rolling bearing 3, thereby achieving efficient operation under large loads.
[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.
Claims
1. A multi-groove pulley, characterized in that: It includes a pulley shaft, with first bearings at both ends of the pulley shaft respectively, and the pulley shaft is rotatably connected to the bearing seat through the first bearings; a plurality of second bearings are provided on the pulley shaft, and the pulley group is rotatably connected to the corresponding pulley monomers through the second bearings; the resistance of the second bearing during rotation is greater than that of the first bearing.
2. A multi-groove pulley according to claim 1, characterized in that: The first bearing is a rolling bearing.
3. A multi-groove pulley according to claim 2, characterized in that: The first bearing is a spherical roller bearing with self-aligning capability.
4. A multi-groove pulley according to claim 1 or 2, characterized in that: The second bearing is a sliding bearing.
5. A multi-groove pulley according to claim 4, characterized in that: The sliding bearing is a self-lubricating bearing.
6. A multi-groove pulley according to claim 1, characterized in that: Both ends of the pulley shaft are sleeved with shaft end retaining rings, the first bearing is located on the outside of the shaft end retaining ring, and the second bearing is located on the inside of the shaft end retaining ring.
7. A multi-groove pulley according to claim 6, characterized in that: Shaft shoulders are arranged at both ends of the pulley shaft, and shaft end retaining rings abut against the outer ends of the shaft shoulders.
8. A multi-groove pulley according to claim 1 or 6, characterized in that: Wheel spacers are provided between adjacent second bearings and / or pulley units.