Pulley device with improved structure

Abstract

The utility model provides a pulley device with an improved structure, which relates to the technical field of pulleys, and comprises a pulley body, two groups of mounting plates and two groups of connecting plates, the pulley body is rotatably arranged at the middle position between the two groups of mounting plates, convex blocks are arranged at the middle positions of the outer sides of the two groups of mounting plates, and the two groups of connecting plates are rotatably arranged at the outer sides of the two groups of mounting plates. The upper portions of the interiors of the two sets of connecting plates are each provided with an inner groove, the protruding blocks and the inner grooves are installed in a sliding mode, the two ends of the interiors of the inner grooves are each provided with a guide rod, and the guide rods penetrate through the protruding blocks. The wheel body is rotationally connected through the mounting plate, the mounting plate is slidably mounted in the inner groove in the connecting plate through the convex block, and in the falling process of a suspended heavy object, the convex block moves upwards along the guide rod to extrude the spring for primary buffering and then extrude the elastic rubber ball for secondary buffering, so that impact force is weakened, and the service life of the wheel body is prolonged. The rotating shaft internally provided with the wheel body is protected, and durability is improved.

Description

Technical Field

[0001] This utility model relates to the field of pulley technology, and in particular to a pulley device with improved structure. Background Technology

[0002] A movable pulley is a pulley whose axle moves along with the object. Essentially, a movable pulley is a lever where the effort arm is twice the resistance arm; it's a force-saving lever that reduces effort but cannot change the direction of the effort and requires a longer distance to move. Movable pulleys have wide applications in daily life.

[0003] The movable pulley is part of the traction device in the inclined shaft of a coal mine. The steel wire rope passing over the movable pulley is connected to the winch at one end and to the ground fixed base at the other end. The pulley is connected to the traction load by a pin. Because the pulley bears a large load and operates at low speed, it is required to work smoothly and reliably. The original design used a sliding friction bearing structure, with the wheel body mounted on the shaft through the bearing. Due to the lack of a buffer structure, during the process of pulling the traction load, especially at the moment of connecting the load and releasing the support, the load is subjected to gravity and falls rapidly. The resulting impact force acts directly on the shaft, which can easily cause the shaft to bend and the bearing to be damaged. Therefore, this utility model proposes a pulley device with an improved structure to solve the problems existing in the prior art. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes an improved pulley device. This improved pulley device provides double buffering, reduces impact force, protects the axle of the internally mounted wheel, and improves durability.

[0005] To achieve the purpose of this utility model, the utility model is implemented through the following technical solution: an improved pulley device, including a wheel body, a mounting plate and a connecting plate. The mounting plate is provided in two sets, and the wheel body is rotatably located at the middle position between the two sets of mounting plates. A protrusion is provided at the middle position of the outer side of each of the two sets of mounting plates. The connecting plate is provided in two sets, and an inner groove is provided at the upper part of the inner side of each of the two sets of connecting plates. The protrusion is slidably installed with the inner groove, and a guide rod is provided at both ends of the inner groove. The guide rod passes through the protrusion, and a spring is connected between the upper part of the protrusion and the upper part of the inner groove. The spring is wound around the outer side of the guide rod, and an elastic ball is provided at the middle position of the upper part of the inner groove.

[0006] Both sets of connecting plates have pin holes at the bottom inside.

[0007] A further improvement is that a pivot is provided at the middle position between the two sets of mounting plates, and the two sides of the pivot pass through the middle position of the two sets of protrusions. Both sides of the pivot are threaded with screw rings.

[0008] A further improvement is that tapered roller bearings are provided on both sides of the rotating shaft, and the tapered roller bearings are located between the two sets of mounting plates. The wheel body is rotatably mounted on the rotating shaft through the tapered roller bearings.

[0009] A further improvement is that a rope groove is provided at the middle position of the outer side of the wheel.

[0010] A further improvement is that a thickened plate is provided on the lower outer side of both sets of connecting plates, and the thickened plate is integrally formed with the connecting plate, with the pin hole penetrating through the thickened plate.

[0011] A further improvement is that: both ends of the two sets of mounting plates are provided with mounting holes, and multiple sets of mounting holes are provided at equal intervals at both ends; bolt rods are inserted into the mounting holes on the front and rear sides, and the rear side of the bolt rods is fixed by nuts.

[0012] A further improvement is that a roller sleeve is rotatably fitted on the outer side of the bolt rod, and the outer side of the roller sleeve is covered with rubber.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This utility model uses an installation plate to rotate and connect the wheel body. The installation plate is slidably installed on the inner groove of the connecting plate through a protrusion. During the process of the suspended heavy object falling, the protrusion moves upward along the guide rod, compressing the spring for the first layer of buffering, and then compressing the elastic ball for the second layer of buffering, thereby reducing the impact force, protecting the rotating shaft of the internally installed wheel body, and improving durability.

[0015] 2. This utility model uses tapered roller bearings to allow the wheel body to rotate on the shaft. Due to the inclined surface structure of the tapered roller bearing, it can withstand both radial and axial loads, making it suitable for the working environment of inclined shafts.

[0016] 3. This utility model connects bolt rods at both ends between two sets of mounting plates and rolls roller sleeves to limit the rope passing over the wheel body. The rolling of the roller sleeves reduces friction with the rope. By installing the bolt rods into mounting holes at different positions, the distance between the bolt rods and the wheel body can be adjusted, thereby adapting to ropes of different thicknesses and controlling the angle between the rope and the wheel body, making it versatile in function. Attached Figure Description

[0017] Figure 1 This is the main view of the utility model;

[0018] Figure 2 This is a schematic diagram of the mounting plate of this utility model;

[0019] Figure 3 This is a schematic diagram of the wheel assembly of this utility model.

[0020] The components are: 1. Wheel body; 2. Mounting plate; 3. Connecting plate; 4. Protrusion; 5. Inner groove; 6. Guide rod; 7. Spring; 8. Elastic ball; 9. Pin hole; 10. Shaft; 11. Threaded ring; 12. Tapered roller bearing; 13. Rope groove; 14. Thickened plate; 15. Mounting hole; 16. Bolt rod; 17. Roller sleeve. Detailed Implementation

[0021] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0022] Example 1

[0023] according to Figure 1 , 2 As shown in Figure 3, this embodiment proposes an improved pulley device, including a wheel body 1, a mounting plate 2, and a connecting plate 3. The mounting plate 2 is provided in two sets, and the wheel body 1 is rotatably positioned at the middle position between the two sets of mounting plates 2. A protrusion 4 is provided at the middle position of the outer side of each of the two sets of mounting plates 2. The connecting plate 3 is provided in two sets, and an inner groove 5 is provided at the upper part of the inner side of each of the two sets of connecting plates 3. The protrusion 4 is slidably installed with the inner groove 5, and guide rods 6 are provided at both ends of the inner groove 5. The guide rods 6 pass through the protrusion 4, and a spring 7 is connected between the upper part of the protrusion 4 and the upper part of the inner groove 5. The spring 7 is wound around the outer side of the guide rod 6. An elastic ball 8 is provided at the middle position of the upper part of the inner groove 5.

[0024] Both sets of connecting plates 3 have pin holes 9 at their lower interiors. In use, the connecting wheel 1 is rotated by the mounting plate 2. The mounting plate 2 is slidably mounted on the inner groove 5 on the connecting plate 3 via the protrusion 4. The wheel 1 passes over the rope and connects to the weight through the pin holes 9. During the descent of the suspended weight, the protrusion 4 moves upward along the guide rod 6, compressing the spring 7 for the first layer of buffering, and then compressing the elastic ball 8 for the second layer of buffering. This reduces the impact force, protects the rotating shaft 10 of the internal mounting wheel 1, and improves durability.

[0025] A pivot 10 is provided at the middle position between the two sets of mounting plates 2, and the pivot 10 extends through the middle position of the two sets of protrusions 4 on both sides. Both sides of the pivot 10 are threaded with screw rings 11. The diameter of the middle port of the pivot 10 is larger than the diameter of the two ends, so that the inner sides of the two sets of mounting plates 2 can be limited on the steps connecting the middle and two ends of the pivot 10, and the outer sides are fixed by screw rings 11.

[0026] Both sides of the rotating shaft 10 are provided with tapered roller bearings 12, and the tapered roller bearings 12 are located between the two sets of mounting plates 2. The wheel body 1 is rotatably mounted on the rotating shaft 10 through the tapered roller bearings 12. In use, the tapered roller bearings 12 provide power for the wheel body 1 to rotate on the rotating shaft 10. Due to the inclined structure of the tapered roller bearings 12, they can withstand both radial and axial loads, making them suitable for the working environment of inclined shafts. In practice, the tapered roller bearings have low frictional resistance, the pulley runs smoothly, meet the usage requirements, and are durable.

[0027] A rope groove 13 is provided at the middle position of the outer side of the wheel 1. The rope groove 13 is used for the rope to pass through.

[0028] Both sets of connecting plates 3 have a thickened plate 14 on their lower outer sides, and the thickened plate 14 is integrally formed with the connecting plate 3. The pin hole 9 passes through the thickened plate 14. The pin hole 9 is used to suspend and connect heavy objects, and the thickened plate 14 is used to improve the strength at the pin hole 9, making it more durable.

[0029] Example 2

[0030] according to Figure 1 , 2 As shown in Figure 3, this embodiment proposes an improved pulley device, including a wheel body 1, a mounting plate 2, and a connecting plate 3. The mounting plate 2 is provided in two sets, and the wheel body 1 is rotatably positioned at the middle position between the two sets of mounting plates 2. A protrusion 4 is provided at the middle position of the outer side of each of the two sets of mounting plates 2. The connecting plate 3 is provided in two sets, and an inner groove 5 is provided at the upper part of the inner side of each of the two sets of connecting plates 3. The protrusion 4 is slidably installed with the inner groove 5, and guide rods 6 are provided at both ends of the inner groove 5. The guide rods 6 pass through the protrusion 4, and a spring 7 is connected between the upper part of the protrusion 4 and the upper part of the inner groove 5. The spring 7 is wound around the outer side of the guide rod 6. An elastic ball 8 is provided at the middle position of the upper part of the inner groove 5.

[0031] Both sets of connecting plates 3 have pin holes 9 at their lower interiors. In use, the connecting wheel 1 is rotated by the mounting plate 2. The mounting plate 2 is slidably mounted on the inner groove 5 on the connecting plate 3 via the protrusion 4. The wheel 1 passes over the rope and connects to the weight through the pin holes 9. During the descent of the suspended weight, the protrusion 4 moves upward along the guide rod 6, compressing the spring 7 for the first layer of buffering, and then compressing the elastic ball 8 for the second layer of buffering. This reduces the impact force, protects the rotating shaft 10 of the internal mounting wheel 1, and improves durability.

[0032] A rope groove 13 is provided at the middle position of the outer side of the wheel 1. The rope groove 13 is used for the rope to pass through.

[0033] Both ends of the two sets of mounting plates 2 are provided with mounting holes 15, and multiple sets of mounting holes 15 are provided at equal intervals at both ends. Bolt rods 16 are inserted into the mounting holes 15 on the front and rear sides, and the rear side of the bolt rods 16 is fixed by nuts. Roller sleeves 17 are rotatably sleeved on the outer side of the bolt rods 16, and the outer side of the roller sleeves 17 is covered with rubber. In use, the bolt rods 16 are connected to both ends between the two sets of mounting plates 2 and the roller sleeves 17 are rolled to limit the rope passing over the wheel body 1. The rolling of the roller sleeves 17 reduces friction with the rope. By installing the bolt rods 16 into the mounting holes 15 at different positions, the distance between the bolt rods 16 and the wheel body 1 can be adjusted, thereby adapting to ropes of different thicknesses and controlling the angle between the rope and the wheel body 1, making it versatile in function.

[0034] The improved pulley device uses a mounting plate 2 to rotatably connect the wheel body 1. The mounting plate 2 is slidably mounted on the inner groove 5 of the connecting plate 3 via a protrusion 4. During the descent of the suspended weight, the protrusion 4 moves upward along the guide rod 6, compressing the spring 7 for the first layer of buffering, and then compressing the elastic ball 8 for the second layer of buffering. This weakens the impact force, protects the rotating shaft 10 of the internally mounted wheel body 1, and improves durability. Simultaneously, a tapered roller bearing 12 is used to allow the wheel body 1 to rotate on the rotating shaft 10. Due to the inclined surface structure of the tapered roller bearing 12, it can withstand both radial and axial loads, making it suitable for the working environment of inclined shafts. In practice, the tapered roller bearing has low frictional resistance, resulting in smooth pulley operation, meeting usage requirements, and is durable. In addition, bolt rods 16 are connected to both ends between the two sets of mounting plates 2 and roller sleeves 17 are rolled to limit the rope passing over the wheel body 1. The rolling of the roller sleeves 17 reduces friction with the rope. By installing the bolt rods 16 on the mounting holes 15 at different positions, the distance between the bolt rods 16 and the wheel body 1 can be adjusted, thereby adapting to ropes of different thicknesses and controlling the angle between the rope and the wheel body 1, thus providing multiple functions.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An improved pulley device, comprising a wheel body (1), a mounting plate (2), and a connecting plate (3), characterized in that: The mounting plate (2) is provided in two sets. The wheel (1) is rotatably located in the middle position between the two sets of mounting plates (2). The middle position of the outer side of the two sets of mounting plates (2) is provided with a protrusion (4). The connecting plate (3) is provided in two sets. The upper part of the inner side of the two sets of connecting plates (3) is provided with an inner groove (5). The protrusion (4) and the inner groove (5) are slidably installed. The two ends of the inner groove (5) are provided with guide rods (6). The guide rods (6) pass through the protrusion (4). A spring (7) is connected between the upper part of the protrusion (4) and the upper part of the inner groove (5). The spring (7) is wrapped around the outer side of the guide rod (6). An elastic ball (8) is provided in the middle position of the upper part of the inner groove (5). Both sets of connecting plates (3) have pin holes (9) at the bottom inside.

2. The improved pulley device according to claim 1, characterized in that: A pivot (10) is provided at the middle position between the two sets of mounting plates (2), and the pivot (10) passes through the middle position of the two sets of protrusions (4) on both sides. Both sides of the pivot (10) are threaded with screw rings (11).

3. The improved pulley device according to claim 2, characterized in that: Both sides of the rotating shaft (10) are provided with tapered roller bearings (12), and the tapered roller bearings (12) are located between the two sets of mounting plates (2). The wheel body (1) is rotatably mounted on the rotating shaft (10) through the tapered roller bearings (12).

4. The improved pulley device according to claim 1, characterized in that: A rope groove (13) is provided at the middle position of the outer side of the wheel (1).

5. The improved pulley device according to claim 1, characterized in that: Both sets of connecting plates (3) have a thickened plate (14) on the lower side of their outer sides, and the thickened plate (14) is integrally formed with the connecting plate (3), and the pin hole (9) passes through the thickened plate (14).

6. The improved pulley device according to claim 1, characterized in that: Both ends of the two sets of mounting plates (2) are provided with mounting holes (15), and multiple sets of mounting holes (15) are provided at equal intervals. Bolt rods (16) are inserted into the mounting holes (15) on the front and rear sides, and the rear side of the bolt rods (16) is fixed by nuts.

7. The improved pulley device according to claim 6, characterized in that: The outer side of the bolt rod (16) is fitted with a roller sleeve (17), and the outer side of the roller sleeve (17) is covered with rubber.

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