Combined pulley block
By designing multiple sets of pulleys and side wheel structures in the pulley set, combining the fixing method of L-shaped side frames and pin shafts, the problem of easy pulley ropes in the existing pulley set is solved, and the safety of the pulley set is significantly improved.
Patent Information
- Application Number
- CN202421304101.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2035-03-04
AI Technical Summary
In the existing pulley set, when the force direction of the pulley is not orthogonal to the central axis of the pulley, the force is large or the force is uneven, it is easy to fall off from the groove, causing safety accidents.
A combined pulley set is designed. By setting up multiple pulley structures and side wheel structures, the side wheels can press the draw rope into the groove of the pulley, and an L-shaped side frame structure is arranged outside the pulley bracket, and the pull rope is inserted through the pin shaft, and the draw rope is wound and fixed on the side frame to achieve the effect of auxiliary fixation.
It effectively solves the problem of pull rope falling off the pulley, increases the safety of pulley use, and ensures stable operation under non-orthogonal stress.
Smart Images
Figure CN222922821U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pulley blocks, and particularly relates to a combined pulley block. Background Art
[0002] A pulley is a round wheel that can rotate around a central axis. A groove is provided on the circumferential surface of the round wheel. When a pulling rope is wound around the groove and either end of the two ends of the pulling rope is pulled forcefully, the frictional force between the pulling rope and the round wheel will cause the round wheel to rotate around the central axis. According to whether the position of the central axis of the pulley moves, the pulley is divided into a fixed pulley and a movable pulley. The central axis of the fixed pulley is fixed and immovable, and the central axis of the movable pulley can move. The pulley is mainly used to change the direction of the force, and the movable pulley is mainly used to change the magnitude of the force. Assembling a fixed pulley and a movable pulley together can form a pulley block. The pulley block is not only labor-saving but also can change the direction of the force; pulleys and pulley blocks are widely used in machinery, mechatronics, engineering construction, amusement parks, etc.
[0003] Normally, the force application direction of the pulling rope on the pulley is orthogonal to the central axis of the pulley. When the force application direction of the pulling rope installed in the pulley or pulley block is not orthogonal to the central axis of the pulley, the force is relatively large or uneven, the pulling rope is likely to fall off from the groove, causing safety accidents. Content of the Utility Model
[0004] Technical Problem to be Solved
[0005] In view of the above-mentioned drawbacks of the prior art, the utility model provides a combined pulley block, which can effectively solve the problem that when the force application direction of the pulling rope installed in the pulley or pulley block is not orthogonal to the central axis of the pulley, the force is relatively large or uneven, the pulling rope is likely to fall off from the groove, causing safety accidents.
[0006] Technical Solution
[0007] To achieve the above object, the utility model is realized through the following technical solutions:
[0008] The utility model provides a combined pulley block, including a pulley bracket; a threaded hole is provided in the middle of the top end of the pulley bracket, and a connecting frame is fixed in the threaded hole. The bottom end of the connecting frame is fixedly connected to the threaded hole through a fixed threaded column. A groove body is provided in the middle of the pulley bracket, and a pin shaft is inserted and fixed in the groove body. A pulley is sleeved on the pin shaft, and a fixed shaft is fixed at the top end of the pulley. A side wheel is sleeved on the outer side of the fixed shaft. A side bracket is provided on one side of the pulley bracket, and a through hole is provided through the side bracket and the outer side of the pulley bracket.
[0009] Further, the side wheel is a cylindrical structure with an inwardly arcuate depression in the middle.
[0010] Further, a round hole is provided in the middle of the connecting frame.
[0011] Further, the side frame is an L-shaped right-angle structure.
[0012] Further, two sets of pulleys and side wheels are arranged inside the pulley bracket.
[0013] Further, the inner diameter of each set of side wheels is smaller than the inner diameter of the pulley.
[0014] Advantageous Effects
[0015] The technical solution provided by the present utility model has the following advantageous effects compared with the known public technology:
[0016] 1. By arranging multiple sets of pulley structures and cooperating with the side wheel structure, the side wheel can press the pulling rope into the groove of the pulley, solving the problem of the pulling rope falling off the pulley and increasing the safety of pulley use.
[0017] 2. In this device, an L-shaped side frame structure is provided on the outer side of the pulley bracket, and through holes are provided through both the side frame and the pulley bracket, and a pin shaft can be inserted through them, so that the pulling rope can be wound and fixed on the pin shaft on the side frame, playing an auxiliary fixing role. Brief Description of the Drawings
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.
[0019] Figure 1 is one of the structural schematic diagrams of the present utility model;
[0020] Figure 2 is the main view of the structure of the present utility model;
[0021] Figure 3 is the sectional view of the structure in the present utility model;
[0022] Figure 4 is the second of the structural schematic diagrams of the present utility model.
[0023] The reference numerals in the drawings respectively represent: 1. Pulley bracket; 2. Connecting frame; 21. Threaded post; 3. Side frame; 31. Through hole; 4. Pin shaft; 5. Pulley; 6. Side wheel. Detailed Embodiment
[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0025] The present utility model will be further described below with reference to the embodiments.
[0026] Embodiment: A combined pulley block, refer to the attached Figure 1 - attached Figure 4 , including a pulley bracket 1; a threaded hole is provided in the middle of the top end of the pulley bracket 1, and a connecting frame 2 is fixed in the threaded hole. The bottom end of the connecting frame 2 is fixedly connected to the threaded hole through a fixed threaded column 21. A groove body is provided in the middle of the pulley bracket 1, and a pin shaft 4 is inserted and fixed in the groove body. A pulley 5 is sleeved on the pin shaft 4, and a fixed shaft is fixed at the top end of the pulley 5, and a side wheel 6 is sleeved on the outside of the fixed shaft. A side frame 3 is provided on one side of the pulley bracket 1, and a through hole 31 is provided through one side of the pulley bracket 1 on the outside of the side frame 3; in a pulley block with two pulley brackets 1 as a group, the directions of the side frames 3 in the two pulley brackets 1 are opposite (that is, contrary). By providing multiple sets of pulley 5 structures and cooperating with the side wheel 6 structure, the side wheel 6 can press the pulling rope into the groove of the pulley 5, solving the problem of the pulling rope falling off the pulley 5 and increasing the safety of using the pulley 5.
[0027] The side wheel 6 is a cylindrical structure with an inwardly curved middle; a round hole is provided in the middle of the connecting frame 2; the side frame 3 is an L-shaped right-angle structure; two sets of pulleys 5 and side wheels 6 are provided in the pulley bracket 1; the inner diameter of each side wheel 6 is smaller than the inner diameter of the pulley 5; an L-shaped side frame 3 structure is provided on the outside of the pulley bracket 1, and through hole 31 structures are provided through both the side frame 3 and the pulley bracket 1, and the pin shaft 4 can be inserted through them, so that the pulling rope can be wound and fixed on the pin shaft 4 on the side frame 3, playing an auxiliary fixing effect.
[0028] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present utility model.
Claims
1. A combined pulley block, characterized in that: The invention comprises a pulley bracket (1); a threaded hole is provided in the middle of the top of the pulley bracket (1), and a connecting frame (2) is fixed in the threaded hole; the bottom end of the connecting frame (2) is fixedly connected to the threaded hole through a fixed threaded column (21); a groove is provided in the middle of the pulley bracket (1), and a pin shaft (4) is inserted and fixed in the groove; a pulley (5) is sleeved on the pin shaft (4), and a fixed shaft is fixed at the top of the pulley (5), and a side wheel (6) is sleeved on the outer side of the fixed shaft; a side frame (3) is provided on one side of the pulley bracket (1), and a through hole (31) is provided on the outer side of the side frame (3) that penetrates through one side of the pulley bracket (1).
2. A combined pulley block according to claim 1, characterized in that: The side wheel (6) is a cylindrical structure with a central portion that is concave inward in an arc shape.
3. The combined pulley block according to claim 1, characterized in that: A circular hole is provided in the middle of the connecting frame (2).
4. The combined pulley block according to claim 1, characterized in that: The side frame (3) is an L-shaped right-angle structure.
5. A combined pulley block according to claim 4, characterized in that: Two groups of pulleys (5) and side wheels (6) are arranged in the pulley bracket (1).
6. The combined pulley block according to claim 1, characterized in that: The inner diameter of each set of side wheels (6) is smaller than the inner diameter of the pulley (5).