Tensioning wheel
By designing the structure of the clamp strip, plastic cover, damping ring, clamp slot, elastic sheet and fixed plate in the tensioning wheel, the wear and abnormal noise caused by friction between the telescopic spring and the damping device is solved, ensuring the buffering and shock absorption effect stability.
Patent Information
- Application Number
- CN202323647418.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The long-term friction between the telescopic spring and the damping device in the tensioning wheel causes wear of the inner wall of the damping device, affecting the buffering and shock absorption effect and causing abnormal noise.
A tensioning wheel structure including support arms, pulleys, self-lubricating bearings, sleeves, bases, clamping strips, plastic wrap sleeves, damping rings, clamp slots, elastic sheets and fixing plates is designed, through clamp strips and sliding grooves The coupling of the damping ring slot and elastic sheet reduces the friction between the telescopic spring and the damping ring, avoiding wear and gaps.
It effectively reduces the friction between the telescopic spring and the damping device, prevents wear, maintains the buffering and shock absorption effect, and avoids abnormal noise.
Smart Images
Figure CN222185650U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tension wheels, in particular to a tension wheel. Background Art
[0002] The tensioner is a follower wheel that is pressed on the belt in order to change the wrap angle of the pulley or control the tension of the belt. It is a tensioning device for belt transmission. When the center distance of the belt cannot be adjusted, the tensioner can be used to tighten the belt.
[0003] In order to ensure that the tensioning wheel has a better shock-absorbing and buffering effect during use, a damping device is required on its inner side to limit the telescopic spring inside the tensioning wheel. However, when the telescopic spring is elastically deformed under the force, the outer ring of the telescopic spring slides closely against the damping device so that the damping device can damp and eliminate the elastic deformation force generated by the telescopic spring. However, the telescopic spring generates friction with the inner wall of the damping device for a long time, which can easily cause a certain degree of wear on the inner wall of the damping device, thereby affecting the diameter of the inner wall of the damping device and causing a gap between the telescopic spring and the damping device, thereby reducing the buffering and shock-absorbing effect of the damping device on the tensioning wheel. At the same time, the telescopic spring causes abnormal noise in the tensioning wheel. Therefore, a tensioning wheel is proposed to address the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide a tensioning wheel to solve the problem that the telescopic spring generates friction with the inner wall of the damping device for a long time, which easily leads to a certain degree of wear of the inner wall of the damping device, thereby affecting the diameter of the inner wall of the damping device, causing a gap to be generated between the telescopic spring and the damping device, thereby reducing the buffering and shock-absorbing effect of the damping device on the tensioning wheel, and at the same time the telescopic spring causes abnormal noise in the tensioning wheel.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A tensioning wheel comprises a support arm, a pulley, a self-lubricating bearing, a sleeve and a base, wherein the outer side of the support arm is rotatably connected to the pulley, the inner side of the support arm is fixedly connected to the self-lubricating bearing, the inner side of the self-lubricating bearing is fixedly connected to the sleeve, the outer side of the sleeve is fixedly connected to the base, a telescopic spring is provided on the inner side of the support arm, a clamping strip is fixedly connected to the inner side of the support arm, a plastic sleeve is slidably connected to the outer side of the clamping strip, a damping ring is fixedly connected to the inner side of the plastic sleeve, a clamping groove is provided on the inner side of the damping ring, an elastic sheet is fixedly connected to the inner side of the clamping groove, the other end of the elastic sheet is fixedly connected to a fixed plate, and a sliding groove is provided on the inner side of the plastic sleeve.
[0007] Preferably, there are several clamping strips, which are evenly distributed on the inner side of the support arm, and the clamping strips slide in the slide grooves, and the length of the clamping strips is much smaller than the length of the slide grooves.
[0008] Preferably, the number of the slide grooves is the same as the number of the clamping strips, the slide grooves are evenly distributed on the outside of the plastic-coating sleeve, the plastic-coating sleeve is engaged with the inside of the support arm, and one side of the plastic-coating sleeve is in close contact with the base.
[0009] Preferably, there are several elastic sheets, which are evenly distributed on the inner side of the damping ring, tightly attached to the outer ring of the telescopic spring, and engaged in the slot. The elastic sheet has the same shape and size as the slot in the damping ring.
[0010] Preferably, the number of the fixing plates is the same as the number of the elastic sheets, the angle between the fixing plates and the elastic sheets is greater than or equal to 90°, and the side of the fixing plates away from the base is in close contact with the telescopic spring.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] In the utility model, by providing the clamping strip, the plastic-coated sleeve, the damping ring, the clamping groove, the elastic sheet, the fixing plate and the sliding groove, when the tension wheel is used, the plastic-coated sleeve can be clamped on the clamping strip on the inner side of the support arm through the sliding groove provided on the inner side thereof, so as to fix and limit the axial movement of the plastic-coated sleeve and the damping ring on the inner side thereof, and when the telescopic spring is subjected to the vibration force transmitted by the support arm and produces telescopic deformation on the inner side of the damping ring, the telescopic spring slides on the inner side of the damping ring at the same time, and then the telescopic spring exerts a compressive force on the elastic sheet on the inner side of the damping ring. , so that the elastic sheet has a tendency to engage in the slot opened on the inner side of the damping ring, and after the telescopic spring is reset, the elastic sheet can still move elastically close to the telescopic spring, thereby ensuring the limiting effect of the damping on the telescopic spring while effectively reducing the fixed friction between the telescopic spring and the damping ring, avoiding a certain degree of wear on the inner wall of the damping ring, causing a gap between the telescopic spring and the damping device, thereby ensuring the buffering and shock-absorbing effect of the damping device on the tensioning wheel, and avoiding the telescopic spring causing abnormal noise in the tensioning wheel. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 This is a schematic diagram of the internal structure of the support arm of the utility model;
[0015] Figure 3 For this utility model Figure 2 Schematic diagram of the structure at A in the middle;
[0016] Figure 4 This is a schematic diagram of the side cross-section structure of the damping ring of the utility model;
[0017] Figure 5 For this utility model Figure 4 Schematic diagram of the structure at point B in the middle.
[0018] In the figure: 1. support arm; 2. pulley; 3. self-lubricating bearing; 4. bushing; 5. base; 6. telescopic spring; 7. clamping strip; 8. plastic sleeve; 9. damping ring; 10. clamping groove; 11. elastic sheet; 12. fixing plate; 13. slide groove. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0021] See also Figure 1-5 , the utility model provides a technical solution:
[0022] A tensioning wheel comprises a support arm 1, a pulley 2, a self-lubricating bearing 3, a sleeve 4 and a base 5, wherein the support arm 1 is rotatably connected to the pulley 2 on the outside, the support arm 1 is fixedly connected to the self-lubricating bearing 3 on the inside, the self-lubricating bearing 3 is fixedly connected to the sleeve 4 on the inside, the sleeve 4 is fixedly connected to the base 5 on the outside, a telescopic spring 6 is provided on the inside of the support arm 1, a clamping strip 7 is fixedly connected to the inside of the support arm 1, a plastic-coated sleeve 8 is slidably connected to the outside of the clamping strip 7, a damping ring 9 is fixedly connected to the inside of the plastic-coated sleeve 8, a clamping groove 10 is provided on the inside of the damping ring 9, an elastic sheet 11 is fixedly connected to the inside of the clamping groove 10, a fixed plate 12 is fixedly connected to the other end of the elastic sheet 11, and a sliding groove 13 is provided on the inside of the plastic-coated sleeve 8.
[0023] There are several clamping strips 7, which are evenly distributed on the inner side of the support arm 1. The clamping strips 7 slide in the slide grooves 13. The length of the clamping strips 7 is much smaller than the length of the slide grooves 13, which is convenient for limiting the axial movement of the plastic sleeve 8 and the damping ring 9; the number of the slide grooves 13 is the same as the number of the clamping strips 7, and the slide grooves 13 are evenly distributed on the outer side of the plastic sleeve 8. The plastic sleeve 8 is clamped on the inner side of the support arm 1, and one side of the plastic sleeve 8 is tightly attached to the base 5, so that the position of the damping ring 9 can be fixed and restricted; there are several elastic sheets 11, which are evenly distributed on the damping ring 9, the elastic sheet 11 is in close contact with the outer ring of the telescopic spring 6, and the elastic sheet 11 is engaged in the slot 10. The elastic sheet 11 is completely the same in shape and size as the slot 10 opened in the damping ring 9, which is convenient for buffering the telescopic force of the telescopic spring 6 and reducing the friction loss of the telescopic spring 6 to the damping ring 9; the number of the fixing plates 12 is the same as the number of the elastic sheets 11, and the angle between the fixing plates 12 and the elastic sheets 11 is greater than or equal to 90°. The fixing plate 12 is in close contact with the telescopic spring 6 away from the side of the base 5, which can prevent the telescopic spring 6 from escaping from the inner side of the damping ring 9.
[0024] Working process: When the tensioning wheel is used, after the telescopic spring 6 on the inner side of the tensioning wheel support arm 1 is subjected to the vibration force of the external belt, the telescopic spring 6 generates a certain degree of elastic deformation on the inner side of the support arm 1, and then the telescopic spring 6 moves telescopically inside the damping ring 9 between the support arm 1 and the base 5. At this time, the lateral movement tendency of the damping ring 9 is stably restricted under the action of the support arm 1 and the base 5 tightly attached at both ends of the damping ring 9. At the same time, the slide groove 13 opened on the inner side of the plastic-wrapped sleeve 8 fixedly connected to the outer side of the damping ring 9 is engaged with the clamping strip 7, so the axial movement tendency of the damping ring 9 is also restricted. Then, when the telescopic spring 6 exerts a telescopic force on the elastic sheet 11 fixedly connected to the inner side of the damping ring 9, the damping ring 9 can be stably restricted on the inner side of the support arm 1, and withstand the telescopic force of the telescopic spring 6 transmitted by the elastic sheet 11. When subjected to the force of the telescopic spring 6, the elastic sheet 11 can gradually engage into the slot 10 provided on the inner side of the damping ring 9. At this time, although the fixing plate 12 to which the elastic sheet 11 is fixedly connected gradually moves toward the outer ring direction of the damping ring 9 along with the elastic sheet 11, the fixing plate 12 close to the telescopic spring 6 is always in close contact with the telescopic spring 6, thereby effectively preventing the telescopic spring 6 from escaping from the damping ring 9. The elastic sheet 11 buffers and eliminates the telescopic force of the telescopic spring 6. While maintaining the limiting effect of the damping ring 9 on the telescopic spring 6, the friction of the telescopic spring 6 on the damping ring 9 is greatly reduced, thereby avoiding a certain degree of wear on the inner wall of the damping ring 9, resulting in a gap between the telescopic spring 6 and the damping ring 9, thereby ensuring the buffering and shock-absorbing effect of the damping ring 9 on the tension wheel, while avoiding the abnormal noise of the tension wheel caused by the telescopic spring 6.
[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A tensioning wheel, comprising a support arm (1), a pulley (2), a self-lubricating bearing (3), a sleeve (4) and a base (5), Features: The outer side of the support arm (1) is rotatably connected to a pulley (2), the inner side of the support arm (1) is fixedly connected to a self-lubricating bearing (3), the inner side of the self-lubricating bearing (3) is fixedly connected to a shaft sleeve (4), the outer side of the shaft sleeve (4) is fixedly connected to a base (5), a telescopic spring (6) is provided on the inner side of the support arm (1), a clamping strip (7) is fixedly connected to the inner side of the support arm (1), a plastic sleeve (8) is slidably connected to the outer side of the clamping strip (7), a damping ring (9) is fixedly connected to the inner side of the plastic sleeve (8), a clamping groove (10) is provided on the inner side of the damping ring (9), an elastic sheet (11) is fixedly connected to the inner side of the clamping groove (10), the other end of the elastic sheet (11) is fixedly connected to a fixed plate (12), and a sliding groove (13) is provided on the inner side of the plastic sleeve (8).
2. A tension wheel according to claim 1, Features: There are a number of the clamping strips (7), which are evenly distributed on the inner side of the support arm (1). The clamping strips (7) slide in the slide groove (13), and the length of the clamping strips (7) is much smaller than the length of the slide groove (13).
3. A tension wheel according to claim 1, Features: The number of the slide grooves (13) is the same as the number of the clamping strips (7); the slide grooves (13) are evenly distributed on the outside of the plastic-coated sleeve (8); the plastic-coated sleeve (8) is engaged with the inside of the support arm (1); and one side of the plastic-coated sleeve (8) is in close contact with the base (5).
4. A tension wheel according to claim 1, Features: There are a number of elastic sheets (11) in total. The elastic sheets (11) are evenly distributed on the inner side of the damping ring (9). The elastic sheets (11) are tightly attached to the outer ring of the telescopic spring (6). The elastic sheets (11) are engaged in the slots (10). The elastic sheets (11) are completely identical in shape and size to the slots (10) provided in the damping ring (9).
5. The tension wheel according to claim 1, Features: The number of the fixing plates (12) is the same as the number of the elastic sheets (11); the angle between the fixing plates (12) and the elastic sheets (11) is greater than or equal to 90°; and the side of the fixing plates (12) away from the base (5) is in close contact with the telescopic spring (6).