A pulley assembly

Abstract

The utility model discloses a pulley assembly belongs to mechanical drive technical field, aims at solving the problem that traditional pulley hook is easy to move, and the size of the rope loop is not adjustable. The assembly includes pulley body and draft suspension mechanism, and the pulley body is composed of wheel frame and wheel body. The draft suspension mechanism contains traction rope, male head and female head, and the male head and the female head form a rope loop after splicing. The female head can move on the traction rope, and the rope loop can be reduced after hanging objects to enhance stability. The utility model has good stability, adjustable rope loop, convenient assembly, and is suitable for traction, hoisting and other scenes.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, specifically to a pulley assembly. Background Technology

[0002] In mechanical transmission and lifting operations, pulleys are commonly used components, which transmit force by being hooked to a fixed object.

[0003] Traditional pulley hooks are mostly made of metal, with a fixed structure. Once hooked, they are prone to shifting on the fixed object, affecting stability. Furthermore, the size of the rope loop cannot be flexibly adjusted to meet actual needs, causing numerous inconveniences in operation.

[0004] In situations requiring precise positioning or heavy loads, the problem of traditional metal hooks being prone to shifting becomes more pronounced, potentially posing safety hazards. Utility Model Content

[0005] (I) Technical Issues

[0006] This utility model aims to at least partially solve one of the technical problems in the related art.

[0007] Therefore, the purpose of this utility model is to propose a pulley assembly that addresses the problems of traditional pulley hooks being easy to move and the rope loop size not being flexibly adjustable.

[0008] (II) Technical Content

[0009] To achieve the above objectives, this utility model proposes a pulley assembly comprising a pulley body and a traction suspension mechanism connected to the top of the pulley body, wherein:

[0010] The pulley body consists of a conventional wheel frame and a wheel body that is rotatably mounted within the wheel frame;

[0011] The traction suspension mechanism includes a traction rope fixed on the wheel frame, a male end fixed to the end of the traction rope, and a female end movably connected to the traction rope. After the male and female ends are spliced ​​together, the traction rope between them forms a loop that is used as a hook.

[0012] By utilizing a structure where the female end can move along the traction rope, the rope loop can be reduced after being hung on an object (such as a crossbar), increasing the stability of the binding and avoiding the problem of traditional metal hooks easily moving on the object.

[0013] In addition, the pulley assembly proposed above according to this utility model may also have the following additional technical features:

[0014] Preferred technical solution 1: The female head consists of a horizontal seat that is slidably sleeved on the traction rope and vertical cylinders distributed at both ends of the horizontal seat;

[0015] Meanwhile, the male end consists of a fixed seat fixed to the end of the traction rope and protruding posts distributed on both sides of the fixed seat.

[0016] When in use, simply insert the protruding post into the vertical tube on the corresponding side from below to quickly assemble the male and female heads; after being hung up, the cross seat will automatically move upward along the traction rope under its own weight or when the wheel is under tension, causing the rope loop to automatically shrink.

[0017] Preferred technical solution 2: The traction ropes are arranged in multiple sets on the top of the wheel frame.

[0018] Preferred technical solution 3: A bolt is installed on the cross seat, and the end of the bolt is tightened so that it can extend into the cross seat and contact the traction rope.

[0019] Preferred technical solution four: Multiple sets of through holes are made along the length of the traction rope to allow bolts to pass through.

[0020] Preferred technical solution five: The side walls surrounding the protruding column on both sides of the fixing seat are arc-shaped walls;

[0021] When the vertical cylinder is inserted into the protruding column, its side wall fits against the arc-shaped wall.

[0022] (III) Technical Effects

[0023] The above structure gives this solution the following advantages:

[0024] 1. Utilizing a structure where the female end can move on the traction rope, the rope loop can be reduced after being hung on an object, increasing the stability of the binding and avoiding the problem of traditional metal hooks being easy to move;

[0025] 2. The position of the cross seat on the traction rope can be defined as needed to meet the usage requirements in different scenarios;

[0026] 3. The male and female connectors can be assembled quickly. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of this solution;

[0029] Figure 2 This is a diagram showing the assembly status of the male and female connectors in this solution;

[0030] Figure 3 This is a schematic diagram of the traction rope structure in this scheme;

[0031] Figure 4This is a schematic diagram of the structure of the horizontal support in this scheme;

[0032] Figure 5 This is a structural schematic diagram of the mounting base for this solution.

[0033] Among them, 1-pulley body, 11-wheel frame, 12-wheel body, 2-traction suspension mechanism, 21-traction rope, 211-through hole, 22-male end, 221-fixed seat, 222-protruding column, 223-arc wall, 23-female end, 231-horizontal seat, 232-vertical cylinder, 233-threaded hole, 24-bolt. Detailed Implementation

[0034] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0035] The pulley assembly of this utility model embodiment will now be described with reference to the accompanying drawings.

[0036] Please see Figures 1-5 The pulley assembly of this utility model embodiment includes a pulley body 1 and a traction suspension mechanism 2, specifically:

[0037] The pulley body 1 consists of a conventional wheel frame 11 and a wheel body 12 rotatably mounted inside the wheel frame 11. The wheel frame 11 is forged from high-strength alloy steel and has an overall "U" shape. The distance between its two side walls is 3-5mm larger than the width of the wheel body 12 to ensure that the wheel body 12 can rotate flexibly. The wheel body 12 is made of wear-resistant cast iron and has an annular rope groove on its outer circumference. The depth of the rope groove is 1 / 8-1 / 6 of the diameter of the wheel body 12. The wheel body 12 is rotatably connected to the wheel frame 11 through the axles at both ends.

[0038] The traction suspension mechanism 2 includes a traction rope 21 fixedly connected to the wheel frame 11, a male end 22 fixedly connected to the end of the traction rope 21, and a female end 23 movably connected to the traction rope 21, wherein:

[0039] The traction rope 21 is made of high-strength polyester flat strip with a thickness of 2-5mm and a width of 10-20mm. It has good flexibility and tensile strength, and a breaking strength of not less than 5000N.

[0040] The female head 23 includes a horizontal seat 231, which is injection molded from engineering plastic. The material is PA66 with glass fiber, and the glass fiber content is 20%-30% to improve its strength and wear resistance. The horizontal seat 231 has a sliding hole along its length that is adapted to the traction rope 21. The cross-sectional shape of the sliding hole is the same as that of the traction rope 21, which is rectangular. The length of the sliding hole is 0.5-1mm larger than the width of the traction rope 21, and the height is 0.3-0.5mm larger than the thickness of the traction rope 21, to ensure that the horizontal seat 231 can slide smoothly on the traction rope 21 without producing excessive sway. Vertical cylinders 232 are integrally formed at both ends of the horizontal seat 231. Their axes are perpendicular to the upper surface of the horizontal seat 231. The inner wall of the vertical cylinder 232 is provided with anti-slip texture to increase the friction when it is engaged with the protrusion 222.

[0041] The male connector 22 includes a fixing seat 221 fixed to the end of the traction rope 21 and protrusions 222 integrally formed on both sides of the fixing seat 221. The fixing seat 221 is also made of PA66 with glass fiber injection molding. The fixing seat 221 and the traction rope 21 are connected by injection molding to ensure that the connection between the two is firm and the tensile force is not lower than the breaking strength of the traction rope 21 itself. The diameter of the protrusions 222 is 0.1-0.3mm smaller than the inner diameter of the vertical tube 232 to ensure that the protrusions 222 can be smoothly inserted into the vertical tube 232 and fit tightly.

[0042] In one embodiment

[0043] Please see Figure 2 , Figure 5 The side walls of the fixing base 221 near the protrusion 222 are arc-shaped walls 223 with the same curvature as the outer wall of the vertical cylinder 232. The radius of the arc-shaped wall 223 is 0.2-0.5mm larger than the outer diameter of the vertical cylinder 232, and the height of the arc-shaped wall 223 is 5-10mm higher than the height of the protrusion 222.

[0044] When assembling the male head 22 and the female head 23, first place the vertical cylinder 232 above the protruding post 222 and fit its side wall against the arc-shaped wall 223 to position the vertical cylinder 232. Then, move the vertical cylinder 232 down along the arc-shaped wall 223. With the help of the guide ridge, the vertical cylinder 232 can be accurately inserted into the protruding post 222. After the male head 22 and the female head 23 are spliced, the tension rope 21 between them forms a rope loop for use as a hook.

[0045] In one embodiment

[0046] Please see Figures 1-3After being hung up, under its own weight or when the wheel 12 is under tension, the cross seat 231 will automatically move upward along the traction rope 21, causing the rope loop to automatically shrink and increasing the stability of the binding. To reduce the twisting of the traction rope 21 during use, two sets of traction ropes 21 are arranged on the top of the wheel frame 11. The cross seat 231 is simultaneously slidably sleeved on both sets of traction ropes 21, and the number of its sliding holes is consistent with the number of traction ropes 21, with their positions corresponding one-to-one; at the same time, the fixing seat 221 is fixedly connected to the ends of both sets of traction ropes 21 to ensure that the two sets of traction ropes 21 are subjected to uniform force.

[0047] In one embodiment

[0048] Please see Figure 1 , Figure 3 , Figure 4 If it is necessary to limit the position of the cross seat 231 on the traction rope 21, a threaded hole 233 facing the traction rope 21 can be opened on the cross seat 231, and a bolt 24 can be installed in the threaded hole 233. The bolt 24 is tightened so that its end extends into the cross seat 231 and enters the sliding hole to contact the traction rope 21.

[0049] To improve the connection strength between the bolt 24 and the traction rope 21, multiple sets of through holes 211 are made along the length of the traction rope 21, through which the bolt post of the bolt 24 can pass. The diameter of the through hole 211 is 0.2-0.3 mm larger than the diameter of the bolt post of the bolt 24. The spacing between two adjacent sets of through holes 211 is 10-15 mm, and the edges of the through holes 25 are rounded with a radius of 1-2 mm to prevent stress concentration from causing the traction rope 21 to break. In use, tightening the bolt 24 so that the bolt post passes through the through hole 211 at the corresponding height can limit the position of the cross seat 231 on the traction rope 21.

[0050] During use, this solution requires daily maintenance of each component according to the established maintenance plan to ensure its working condition.

[0051] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pulley assembly, characterized in that, include: The pulley body (1) consists of a wheel frame (11) and a wheel body (12) that is rotatably mounted inside the wheel frame (11); The traction suspension mechanism (2) includes a traction rope (21), a male connector (22), and a female connector (23), wherein: The traction rope (21) is fixed to the wheel frame (11); The male end (22) is fixedly connected to the end of the traction rope (21); The female head (23) is movably mounted on the traction rope (21) and can move along the traction rope (21); After the male head (22) and female head (23) are spliced ​​together, the stretching rope between them forms a rope loop.

2. The pulley assembly according to claim 1, characterized in that, The female head (23) includes a horizontal seat (231), which is slidably sleeved on the traction rope (21), and there are vertical cylinders (232) at both ends of the horizontal seat (231); The male head (22) includes a fixed seat (221) fixed to the end of the traction rope (21) and protrusions (222) formed on both sides of the fixed seat (221), and the protrusions (222) are inserted into the vertical tube (232).

3. The pulley assembly according to claim 2, characterized in that, The traction ropes (21) are arranged in multiple sets at the top of the wheel frame (11); The horizontal seat (231) is simultaneously slidably sleeved on multiple sets of traction ropes (21); at the same time, the fixed seat (221) is simultaneously fixedly connected to the ends of multiple sets of traction ropes (21).

4. The pulley assembly according to claim 2, characterized in that, Bolts (24) are installed on the cross seat (231) for tightening and fixing the traction rope (21).

5. The pulley assembly according to claim 4, characterized in that, The traction rope (21) has multiple sets of through holes (211) along its length, through which bolts (24) can pass.

6. The pulley assembly according to claim 2, characterized in that, The side walls of the fixed base (221) near the protruding column (222) are arc-shaped walls (223) with the same curvature as the outer wall of the vertical cylinder (232), and the height of the arc-shaped wall (223) is higher than the height of the protruding column (222); The arc-shaped wall (223) is used to provide guidance and support for the connection between the vertical cylinder (232) and the convex column (222).

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