A pulley arrangement

Abstract

The utility model discloses a pulley device, including main body and be located on the additional pulley assembly of main body, additional pulley assembly includes additional pulley, side door and limiting body, additional pulley and limiting body are opposite and are located at the same side of main body, and one end of side door is rotatably connected in the end of additional pulley, and the opposite other end of side door is separable type limit cooperation with limiting body. Use this pulley device, need not to carry out the complicated dismounting and reassembly to pulley or rope group, only need to open after the rotation of side door and will be equipped with the rope from the side into additional pulley can be realized, and need not to take out or rewrap completely to the longer rope, make pulley group rapidly enter the required use state.

Description

Technical Field

[0001] This utility model relates to the field of pulley technology, and specifically to a pulley device. Background Technology

[0002] Pulleys, as simple yet efficient mechanical devices, are widely used in numerous fields due to their ability to change the direction of force and their labor-saving characteristics. Whether used on construction sites to lift building materials, in logistics and warehousing, or in outdoor sports for transporting goods, pulleys play an indispensable role.

[0003] like Figure 1 The pulley system shown is a common and typical application, cleverly composed of a pair of pulleys and a rope. This structure can well meet the needs of many conventional scenarios, achieving a change in the direction of force and a labor-saving effect through a reasonable rope winding method and the cooperation of the movable pulley A and the fixed pulley B. However, in practical applications, regarding... Figure 1 The pulley system shown in the figure suffers from limitations in ease of use and functionality in certain complex scenarios, revealing some problems that urgently need to be addressed.

[0004] For example, in Figure 1 In the normal configuration shown, the rope is in a downward pulling mode. However, in some special scenarios, due to factors such as spatial layout, operating habits, or actual work requirements, it is necessary to change the direction of force on the rope during use. For example, when it is necessary to change to an upward pulling operation on the left side of the rope, this pulley block structure cannot directly meet this requirement.

[0005] For example, when the pulley system has already been arranged... Figure 1 The assembly is complete as shown. Since the upper and lower pulleys are not functionally identical, in certain scenarios, they need to be inverted for use—that is, the pulley that was originally below is now in the upper position. In this inverted configuration, if the pulley's downward pulling method is still desired, the rope must be removed from the lower pulley. Because ropes are typically long, this process is extremely cumbersome, requiring considerable time and effort to fully extract the rope and restore it to normal operating condition. Furthermore, this inverted method of direct use negatively impacts the force distribution on the pulley system. Removing the rope from the lower pulley reduces the actual force on that lower movable pulley, thus increasing the force on the free end of the rope.

[0006] In summary, regarding Figure 1The pulley system shown presents numerous problems, such as inconvenience and laborious operation, when faced with special needs like changing the positions of the upper and lower pulleys or altering the direction of rope tension. Therefore, designing a new pulley structure that allows for convenient and quick operation even when changing the upper and lower pulleys or altering the direction of rope tension, without increasing the tension at the free end of the rope, has become a critical issue that urgently needs to be addressed in this field. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide a pulley device to solve the above-mentioned technical problems.

[0008] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a pulley device, including a main body and an additional pulley assembly disposed on the main body; the additional pulley assembly includes an additional pulley, a side stop, and a limiting body; the additional pulley and the limiting body are disposed opposite to each other on the same side of the main body, one end of the side stop is rotatably connected to the end of the additional pulley, and the other end of the side stop is detachably limited and matched with the limiting body.

[0009] Furthermore, the additional pulley includes a connecting shaft and a pulley body rotatably mounted on the connecting shaft, with the inner end of the connecting shaft connected to the main body; the side stop includes a main body and a locking component, with the main body rotatably mounted on the outer end of the connecting shaft.

[0010] Furthermore, the main body is provided with a limiting part that cooperates with the limiting body, and the locking member is rotatably provided on the main body; the locking member includes a locking piece, and a limiting notch is provided on the side of the limiting part facing the locking piece; the locking piece cooperates with the limiting part to limit the limiting body in the limiting notch, or to release the limiting body.

[0011] Furthermore, an installation groove is provided on the outer side of the main body near the limiting part, and an installation shaft and an elastic element are provided in the installation groove. The locking piece is rotatably mounted on the installation shaft, and the two ends of the elastic element are respectively connected to the main body and the locking piece.

[0012] Furthermore, the side of the locking plate facing the limiting part is an arc-shaped surface.

[0013] Furthermore, the additional pulley assembly is detachably connected and mounted on the main body.

[0014] Furthermore, the inner end of the connecting shaft is connected to the main body by a thread; the limiting body is shaped like a shaft, and the inner end of the limiting body is connected to the main body by a thread.

[0015] When using, Figure 1The pulley in the lower middle section is replaced with the pulley device of this utility model. When it is necessary to perform an upward pull operation on the left side, or to use the upper and lower pulleys in reverse, there is no need to disassemble and reassemble the pulley or rope assembly in a complicated manner. It is only necessary to rotate and open the side gate and put the rope into the additional pulley from the side. There is no need to completely pull out or rewind the long rope, so that the pulley assembly can quickly enter the required use state. At the same time, it will not reduce the number of pulleys under force, which would increase the force on the free end of the rope. Attached Figure Description

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration.

[0017] Figure 1 This is a reference diagram showing the usage state of the upper and lower pulleys after assembly using existing technology.

[0018] Figure 2 This is a perspective view of a pulley device according to the present invention.

[0019] Figure 3 This is an exploded perspective view of a pulley device according to the present invention.

[0020] In the diagram, 1 is the main body, 10 is the additional pulley assembly, 2 is the additional pulley, 3 is the side door, 4 is the limiting body, 21 is the connecting shaft, 22 is the pulley body, 31 is the main body, 32 is the locking component, 311 is the limiting part, 312 is the locking plate, 313 is the actuating bar, 314 is the limiting notch, 315 is the mounting groove, 316 is the mounting shaft, and 317 is the elastic component. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0022] like Figure 2 and Figure 3 As shown, this utility model discloses a pulley device, including a main body 1 and an additional pulley assembly 10 disposed on the main body 1. The main body 1 serves as the basic support part of the entire pulley device, undertaking the main load-bearing function. In this embodiment, the main body 1 preferably includes two pulleys, and a conventional structure can be adopted, such as... Figure 1 The pulley A at the bottom center can serve as the main body 1 of the pulley device of this utility model.

[0023] The auxiliary pulley assembly 10 includes an auxiliary pulley 2, a side gate 3, and a limiting body 4. The auxiliary pulley 2 and the limiting body 4 are positioned opposite each other on the same side wall of the main body 1. One end of the side gate 3 is rotatably connected to the end of the auxiliary pulley 2, and the other end of the side gate 3 is detachably limited and engaged with the limiting body 4. A rope channel is formed between the auxiliary pulley 2, the side gate 3, and the limiting body 4. Under normal conditions, the side gate 3 and the limiting body 4 can be engaged by locking or other means to keep the side gate 3 closed. When it is necessary to install or remove a rope, especially for longer ropes, rotating the side gate 3 allows for convenient and quick loading or unloading of the rope directly from the side onto the auxiliary pulley 2, avoiding the cumbersome process of completely pulling out or rewinding the rope in traditional methods, thus greatly improving installation efficiency.

[0024] The auxiliary pulley 2 includes a connecting shaft 21 and a pulley body 22 rotatably mounted on the connecting shaft 21. The inner end of the connecting shaft 21 is threadedly connected to the main body 1. This detachable connection method facilitates installation and disassembly, and makes it convenient to maintain and replace the auxiliary pulley 2. The connecting shaft 21 of the auxiliary pulley 2 is coaxially arranged with the pulley of the main body 1. The pulley body 22 can use a conventional structure, which can rotate smoothly under the drive of the rope.

[0025] The side gate 3 includes a body 31 and a locking member 32. The body 31 is rotatably mounted on the outer end of the connecting shaft 21. A protruding limiting part 311, which engages with the limiting body 4, is provided on the body 31. The rotation radius of the limiting part 311 is larger than other parts of the body 31, so that when the body 31 is rotated, a lateral gap is created when the limiting part 311 is not in contact with the limiting body 4, facilitating the insertion of a rope; and when the limiting part 311 contacts the limiting body 4, it forms a closed state, securely confining the rope within the rope channel. The locking member 32 is rotatably mounted on the body 31. The locking member 32 includes a locking piece 312 and a toggle bar 313. A limiting recess 314 is provided on the side where the limiting part 311 engages with the locking piece 312. The locking piece 312 engages with the limiting part 311 to limit the limiting body 4 within the limiting recess 314. Figure 2 When it is necessary to close the side door 3, rotate the side door 3 counterclockwise so that the locking piece 312 engages with the limiting part 311, and the limiting body 4 is limited in the limiting recess 314, thereby fixing the position of the side door 3; when it is necessary to open the side door 3, rotate the locking piece 312 clockwise to release the limiting body 4, and the side door 3 can be rotated open.

[0026] The actuating bar 313 is located on the outside of the locking piece 312 and protrudes outward, while extending in the direction of the limiting part 311. Figure 2 When the state shown is rotated clockwise, manually moving the lever 313 will cause the locking piece 312 to rotate, thereby causing the limiting body 4 to disengage from the limiting position formed by the locking piece 312 and the limiting part 311, and then the side door 3 can be rotated open.

[0027] A mounting groove 315 is provided on the outer side of the main body 31 near the limiting part 311. A mounting shaft 316 and an elastic element 317 are provided in the mounting groove 315. The locking piece 312 is rotatably mounted on the mounting shaft 316. Space is reserved in the mounting groove 315 for the locking piece 312 to rotate. The two ends of the elastic element 317 are connected to the main body 31 and the locking part 32, respectively. The elastic element 317 enables the locking piece 312 to better cooperate with the limiting part 311 when no external force is applied, so that the limiting body 4 is limited in the limiting recess 314, ensuring the stability of the side door 3 in the closed state.

[0028] The side of the locking piece 312 facing the limiting part 311 is an arc-shaped surface. The arc of the locking piece 312, the shape and size of the limiting recess 314, and the outer diameter of the limiting body 4 can be designed and adjusted according to specific circumstances. As long as the limiting body 4 can be inserted into the limiting recess 314 between the locking piece 312 and the limiting part 311 during limiting, and the limiting body 4 can be smoothly disengaged when the actuating bar 313 is rotated.

[0029] In this embodiment, the additional pulley assembly 10 is detachably connected to the main body 1. Specifically, the inner end of the connecting shaft 21 is threadedly connected to the main body 1; the limiting body 4 is shaft-shaped, and its inner end is threadedly connected to the main body 1. The detachable design facilitates individual maintenance and replacement of each component.

[0030] When using, Figure 1 The lower pulley A is replaced with the pulley device of this utility model. In most cases, only the main body 1 is needed as the support. However, in the two special usage scenarios described in the background art, but not limited to these two scenarios, namely when it is necessary to change the direction of rope force during use or when the upper and lower pulleys need to be inverted after assembly, there is no need for cumbersome disassembly and reassembly of the pulleys or rope assembly. It is only necessary to rotate and open the side gate 3 and then insert the rope into the auxiliary pulley 2 from the side, without having to completely pull out the longer rope or re-insert and wind it from the end of the rope. This allows the pulley assembly to quickly enter the required usage state, and at the same time, it avoids the situation where the number of force-bearing pulleys is reduced, resulting in an increase in the force on the free end of the rope.

[0031] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A pulley device, characterized in that: The system includes a main body and an additional pulley assembly disposed on the main body; the additional pulley assembly includes an additional pulley, a side gate, and a limiting body; the additional pulley and the limiting body are disposed opposite each other on the same side of the main body, one end of the side gate is rotatably connected to the end of the additional pulley, and the other end of the side gate is detachably limited and engaged with the limiting body.

2. The pulley device according to claim 1, characterized in that: The additional pulley includes a connecting shaft and a pulley body rotatably mounted on the connecting shaft, with the inner end of the connecting shaft connected to the main body; the side gate includes a body and a locking component, with the body rotatably mounted on the outer end of the connecting shaft.

3. The pulley device according to claim 2, characterized in that: The main body is provided with a limiting part that cooperates with the limiting body, and the locking member is rotatably provided on the main body; the locking member includes a locking piece, and a limiting notch is provided on the side of the limiting part that cooperates with the locking piece; the locking piece cooperates with the limiting part to limit the limiting body in the limiting notch, or to release the limiting body.

4. The pulley device according to claim 3, characterized in that: An installation groove is provided on the outer side of the main body near the limiting part. An installation shaft and an elastic element are provided in the installation groove. The locking piece is rotatably disposed on the installation shaft. The two ends of the elastic element are respectively connected to the main body and the locking piece.

5. The pulley device according to claim 4, characterized in that: The side of the locking piece facing the limiting part is an arc-shaped surface.

6. The pulley device according to claim 2, characterized in that: The additional pulley assembly is detachably connected and mounted on the main body.

7. The pulley device according to claim 6, characterized in that: The inner end of the connecting shaft is threaded to the main body; the limiting body is shaft-shaped and its inner end is threaded to the main body.

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