Variable-speed belt pulley
By designing a variable-speed pulley and adopting a slider and groove combination and positioning block structure, the pulley diameter can be flexibly adjusted, solving the problem that traditional pulleys cannot be adjusted, reducing equipment costs and downtime, and facilitating modular replacement.
Patent Information
- Application Number
- CN202520406843.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-03-10
AI Technical Summary
Traditional pulleys use a fixed diameter design, which cannot be flexibly adjusted, resulting in high equipment costs, large space occupation, and the need for complete disassembly for replacement, leading to long downtime for maintenance.
Design a variable speed pulley that uses a slider and a groove to cooperate. The pulley can be adjusted by sliding the slider and groove inside and outside. Combined with the isosceles trapezoidal structure of the positioning block and slot, the pulley diameter can be adjusted. The groove, groove and shaft are integrated to form a whole assembly. The pulley is made of cast iron to enhance the structural strength.
It enables the selection of different wheel diameters for variable speed transmission according to needs, reduces equipment costs, reduces redundant parts, simplifies adjustment steps, reduces downtime, and facilitates modular replacement and maintenance.
Smart Images
Figure CN223768062U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of belt pulley technology, and in particular to a variable speed belt pulley. Background Technology
[0002] A pulley (also known as a belt pulley or drive pulley) is a key component in a mechanical transmission system. It works in conjunction with a belt to transmit motion and power. It is usually made of metal, plastic or other sturdy materials. The working principle of a pulley is to transmit power from one shaft to another through friction with the belt.
[0003] A variable-speed pulley (also called an adjustable-speed pulley or variable-speed belt pulley) is a type of pulley whose diameter or working angle can be adjusted. It is commonly used in mechanical equipment to change the belt tension by altering the pulley's diameter, thus achieving speed regulation. However, traditional pulleys use a fixed diameter design, which cannot be flexibly adjusted according to speed requirements. This necessitates the use of multiple pulleys of different sizes, resulting in high equipment costs, large space occupation, and lengthy downtime for pulley replacement due to the need for complete disassembly. Therefore, this invention proposes a variable-speed pulley to solve the problems mentioned in the background section. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a variable speed belt pulley.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A variable speed pulley includes a sleeve base. A pulley 1 and a pulley 2 are disposed on one side of the sleeve base. The sleeve base has grooves corresponding to pulley 1 and pulley 2 inside. Both pulley 1 and pulley 2 are annular cast iron structures, with the inner diameter of pulley 1 larger than the outer diameter of pulley 2. A plurality of sliders are fixed to the inner sides of pulley 1 and pulley 2, arranged in a circular array within the pulley 1 and pulley 2. The sleeve base has grooves corresponding to the sliders inside. A plurality of positioning blocks are disposed inside the sleeve base, arranged in a circular array within the sleeve base. A slot corresponding to the outer end of each positioning block is formed on the inner side of each slider.
[0007] Preferably, each of the positioning blocks has a screw block fixed at its rear end on the other side of the wheel sleeve seat, and the wheel sleeve seat has a plurality of sliding grooves corresponding to the positioning blocks, and the positioning blocks slide in the corresponding sliding grooves.
[0008] Preferably, a rotating shaft is fixedly connected to the center of the other side of the wheel sleeve seat, and a plurality of screws are rotatably connected to the other side of the wheel sleeve seat. The plurality of screws are threadedly connected to a plurality of screw blocks, and the inner end of the rotating shaft is provided with a slot corresponding to the plurality of screw blocks and screws.
[0009] Preferably, a knob is fixed to the outer end of one of the screws, and a bevel gear two is fixed to the inner end of each of the screws. A bevel gear one is disposed at the center of each of the bevel gear two. The bevel gear one meshes with the bevel gear two, and the bevel gear one is rotatably connected to the gear sleeve seat.
[0010] Preferably, both pulley one and pulley two slide in the wheel groove through a plurality of sliders and a second sliding groove, the front end face of the positioning block is an isosceles trapezoid shape, and the slot one is a corresponding shape.
[0011] Preferably, a locking stud is fixed to the outside of the slider, an opening corresponding to the locking stud is provided at the outer end of the positioning block, and a locking nut that is tightly attached to the outer side of the positioning block is threaded onto the locking stud.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] 1. This utility model achieves independent sliding adjustment of pulley one and pulley two through the cooperation of slider and slide groove two. Different pulley diameters can be selected according to the needs to meet the requirements of speed transmission. The isosceles trapezoidal structure design of positioning block and slot one ensures the positioning stability when the pulley is extended and retracted. The internal positioning blocks not only realize the positioning of the pulley that is removed, but also provide stable internal support for the pulley that is removed, ensuring the long-term stable working state of the speed transmission pulley.
[0014] 2. This utility model integrates slide groove one, slide groove two and rotating shaft into an integrated assembly space, reducing redundant parts. The pulley is made of cast iron and combined with the circular array of sliders to enhance structural strength and transmission balance. The knob centrally controls the screw rotation, simplifying the adjustment steps. The modular design of the pulley facilitates replacement or maintenance, reducing downtime. Attached Figure Description
[0015] Figure 1 This utility model provides a schematic diagram of the structure of a variable speed belt pulley. Figure 1 ;
[0016] Figure 2 This utility model provides a schematic diagram of the structure of a variable speed belt pulley. Figure 2 ;
[0017] Figure 3 This utility model provides a schematic diagram of the structure of a variable speed belt pulley. Figure 3 ;
[0018] Figure 4 This is a schematic diagram of the structure of the gear sleeve seat of the variable speed belt pulley proposed in this utility model;
[0019] Figure 5This is a schematic diagram of the back section of the gear sleeve seat of a variable speed belt pulley proposed in this utility model;
[0020] Figure 6 This is a schematic diagram of the structure of two pulleys in a variable speed belt pulley proposed in this utility model.
[0021] In the diagram: 1. Wheel sleeve seat; 2. Pulley 1; 3. Pulley 2; 4. Positioning block; 5. Locking stud; 6. Slider; 7. Locking nut; 8. Screw; 9. Shaft; 10. Screw block; 11. Knob; 12. Bevel gear 1; 13. Bevel gear 2; 14. Slot 1; 15. Slide groove 1; 16. Wheel groove; 17. Opening; 18. Slide groove 2. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] Reference Figure 1-6 A variable speed pulley includes a sleeve base 1. A pulley 2 and a pulley 3 are disposed on one side of the sleeve base 1. The sleeve base 1 has grooves 16 corresponding to the pulleys 2 and 3. Both pulleys 2 and 3 are annular cast iron structures, with the inner diameter of pulley 2 larger than the outer diameter of pulley 3. A plurality of sliders 6 are fixed to the inner sides of both pulleys 2 and 3, arranged in a circular array within them. The sleeve base 1 also has grooves corresponding to the sliders 6. Slot 2 18, pulley 1 2 and pulley 2 3 are all slidably in the wheel groove 16 through several sliders 6 and the inner and outer sides of the sliding groove 2 18. A rotating shaft 9 is fixedly connected to the center of the other side of the wheel sleeve seat 1. This speed change belt pulley is composed of wheel sleeve seat 1, two pulleys and rotating shaft 9. The whole belt pulley is rotatably mounted on the corresponding equipment bearing by rotating shaft 9. According to actual needs, the corresponding pulley 1 2 or pulley 2 3 can be slid out of the wheel groove 16, while the other pulley remains in the wheel sleeve seat 1, so as to achieve the effect of adjusting the pulley diameter and thus achieve the purpose of speed change.
[0024] The wheel sleeve seat 1 contains several positioning blocks 4 arranged in a circular array. Several sliders 6 have slots 14 on their inner sides corresponding to the outer ends of the positioning blocks 4. Each positioning block 4 has a screw block 10 fixed to its rear end on the other side of the wheel sleeve seat 1. The wheel sleeve seat 1 contains several sliding grooves 15 corresponding to the positioning blocks 4, allowing the positioning blocks 4 to slide within these grooves. Several screw rods 8 are rotatably connected to the other side of the wheel sleeve seat 1, and these screw rods 8 are threadedly connected to the screw blocks 10. The inner end of the rotating shaft 9 has slots corresponding to the screw blocks 10 and screw rods 8. The front end of the positioning block 4 is an isosceles trapezoid, and the slots 14 are of a corresponding shape. When selected... When the pulley 2 is 3, first rotate several screws 8 on the other side of the wheel sleeve seat 1 to realize the sliding of several screw blocks 10 connected to the screws 8. The screw blocks 10 drive the connected positioning blocks 4 to slide in the corresponding sliding groove 15 until the outer end of the positioning blocks 4 corresponds to the slot 14 of the inner slider 6 of the pulley 2. At this time, the pulley 2 3 in the wheel sleeve seat 1 can be slid outward. The pulley 2 3 is sleeved on the outer end of the corresponding positioning blocks 4 through the slot 14 of the inner sliding groove 6. When the pulley 1 2 is selected, the pulley 2 3 needs to be removed first so that after several positioning blocks 4 pass through the pulley 2 3, the outer end of the positioning blocks 4 corresponds to the slot 14 of several sliders 6 inside the pulley 1 2. At this time, the pulley 2 3 can be reinstalled and the pulley 1 2 can be removed.
[0025] A knob 11 is fixed to the outer end of a screw 8, and a number of screws 8 are fixed to the inner ends of bevel gears 13. A bevel gear 12 is set at the center of the number of bevel gears 13. The bevel gear 12 meshes with the number of bevel gears 13, and the bevel gear 12 is rotatably connected to the wheel sleeve seat 1. A screw 8 can be rotated by the knob 11. The screw 8 drives the bevel gear 13 meshing in the middle through the bevel gear 12 at the inner end, and then drives the other bevel gears 12 meshing with the bevel gear 13, thereby driving the other screws 8 to rotate, so that the above screws 8 can rotate at the same time, and the position of the connecting positioning block 4 can be adjusted.
[0026] A locking stud 5 is fixed to the outside of the slider 6. The outer end of the positioning block 4 is provided with an opening 17 corresponding to the locking stud 5. A locking nut 7 is threaded onto the locking stud 5 and is close to the outer side of the positioning block 4. When the pulley 1 2 or pulley 2 3 slides out, the pulley is fitted onto the outer end of the isosceles trapezoidal shape of the positioning block 4 through the slot 14 of the inner slider until the pulley 1 2 is close to the outer end of the positioning block 4. At this time, the screw 8 can be rotated slightly so that the outer end of the positioning block 4 is locked with the corresponding slot 14 of the slider 6, which plays the role of supporting the pulley. When the pulley slides out to the outermost side, the locking stud 5 on the outside of the slider 6 passes through the corresponding opening 17. By rotating the locking nut 7 on the locking stud 5, the inner and outer positions of the pulley can be fixed. The pulley removed at this time can be used for the purpose of assembling the entire speed change pulley structure with the belt.
[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A variable pulley, characterized by, The utility model provides a wheel sleeve seat (1) one side is provided with with wheel one (2) and with wheel two (3), the wheel sleeve seat (1) inside is provided with the wheel groove (16) corresponding with wheel one (2) and with wheel two (3), with wheel one (2) and with wheel two (3) are annular cast iron structure, and with wheel one (2) inner diameter is greater than with wheel two (3) outer diameter, with wheel one (2) and with wheel two (3) inside are fixed with a plurality of sliding block (6), a plurality of sliding block (6) are annular array arrangement in with wheel one (2) and with wheel two (3), the wheel sleeve seat (1) inside is provided with the sliding slot two (18) corresponding a plurality of sliding block (6), the wheel sleeve seat (1) inside is provided with a plurality of positioning insert block (4), a plurality of positioning insert block (4) are annular array arrangement in the wheel sleeve seat (1), a plurality of sliding block (6) inside are all provided with the insert groove one (14) corresponding the outer end of positioning insert block (4).
2. The variable pulley according to claim 1, wherein A plurality of positioning insert block (4) rear end are all fixed with the screw block (10) located the other side of wheel sleeve seat (1), the wheel sleeve seat (1) is provided with a plurality of sliding slot one (15) corresponding positioning insert block (4), and positioning insert block (4) is slid in corresponding sliding slot one (15).
3. The variable pulley according to claim 1, wherein The other side center of wheel sleeve seat (1) is fixedly connected with the rotating shaft (9), and the other side of wheel sleeve seat (1) is rotatably connected with a plurality of screw rods (8), a plurality of screw rods (8) are threadedly connected with a plurality of screw blocks (10) correspondingly, and the inner end of rotating shaft (9) is provided with a slot corresponding to a plurality of screw blocks (10) and screw rods (8).
4. The variable pulley according to claim 3, wherein The outer end of a screw rod (8) is fixedly connected with a rotating knob (11), the inner end of a plurality of screw rods (8) is fixedly connected with a plurality of bevel gears two (13), a plurality of bevel gears one (12) are arranged in the center of a plurality of bevel gears two (13), the bevel gear one (12) is engaged with a plurality of bevel gears two (13), and the bevel gear one (12) is rotatably connected to the wheel sleeve seat (1).
5. The variable pulley according to claim 1, wherein With wheel one (2) and with wheel two (3) are slid in the wheel groove (16) by a plurality of sliding blocks (6) and sliding slot two (18) inside and outside, the front end face of positioning insert block (4) is isosceles trapezoidal, and the insert groove one (14) is corresponding shape.
6. The variable pulley according to claim 1, wherein The outer side of the sliding block (6) is fixedly connected with a locking stud (5), the outer end of the positioning insert block (4) is provided with an opening (17) corresponding to the locking stud (5), and the locking stud (5) is threadedly connected with a locking nut (7) tightly attached to the outer side of the positioning insert block (4).