Belt wheel assembly
By using pads in the pulley assembly to fit the bearings and bolts, the problem of mismatch between the bearings and bolts is solved, and cost reduction and production speed are achieved.
Patent Information
- Application Number
- CN202422368339.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-27
AI Technical Summary
In existing pulley assembly, the size of the bearing and bolts are not matched to the size of the bearings lead to high production costs and prone to cracking of the bolts.
The pad is used to cooperate with the bolts, and the steps are formed by the insertion of the pads and the ring pressing part and the inner ring of the bearing to achieve the fixation of the bolts and bearings. The existing pulley body, bearings and bolts are used to reduce production costs and speed up production speed.
Compatibility with existing components is achieved, reducing production costs and improving production efficiency.
Smart Images
Figure CN223120545U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pulley assembly, in particular to a pulley assembly used in a transmission system. Background Art
[0002] Currently, in an internal combustion engine, the power of the internal combustion engine is usually transmitted through a transmission component. When the transmission component works, a pulley needs to be set to transmit the power of the transmission component or change the movement direction of the transmission component. Commonly, the pulley includes a bearing and a transmission wheel arranged on the outer ring of the bearing.
[0003] The pulley is usually tightened to the shaft of the base by bolts. The inner ring of the bearing of the pulley is matched with the shaft of the base to fix the pulley in the axial and radial directions. The transmission wheel and the outer ring of the bearing rotate around the axis.
[0004] When selecting the bearing of the pulley, due to various reasons, the selected bearing cannot be perfectly matched with the size of the bolt. For example, the radial dimension of the bolt may be relatively smaller than the diameter of the inner ring of the bearing, and the two cannot be well adapted. In some products, if large-diameter bolts are used, it will increase the management cost, and the existing bolts cannot be utilized. Moreover, the large-diameter bolts may cause the flange at the tail of the bolt to crack due to the large diameter.
[0005] Therefore, a new pulley assembly is needed. Summary of the Utility Model
[0006] The technical problem to be solved by the utility model is to provide a new pulley assembly.
[0007] To solve the above technical problem, the utility model provides a pulley assembly, including a pulley body, which is cylindrical and used to act on a transmission component; a bearing, arranged in the pulley body, the bearing includes an inner ring and an outer ring, the pulley body is relatively fixed to the outer ring of the bearing and can rotate around the axis of the bearing, and the inner ring of the bearing is relatively fixed to the base after assembly, used to sleeved the pulley on the base; a bolt, including a screw rod part threadedly matched with the base and a flange part pressing on the inner ring of the bearing; a cushion block is also arranged between the flange part and the inner ring of the bearing, the first axial end face of the cushion block is pressed by the flange part of the bolt, and the second axial end face of the cushion block presses on the inner ring of the bearing.
[0008] The beneficial effect of the utility model lies in that: in new products, the existing pulley body, bearing and bolt in other projects can be used. By using the cushion block to match the bearing with the bolt, the production and manufacturing cost is reduced, and the production speed is accelerated. Description of the Drawings
[0009] Figure 1 It is a schematic cross-sectional view of the pulley assembly of this creation. Detailed Embodiment
[0010] The following will clearly and completely describe the pulley assembly of the present utility model in conjunction with the attached drawings. Figure 1
[0011] A pulley assembly is used in a transmission system, such as an internal combustion engine or an electric drive system, to transmit power or change the transmission direction for transmission components. Among them, the pulley assembly of this creation is particularly suitable for transmission components such as belts and chains.
[0012] A pulley assembly includes a pulley body 1, which is cylindrical and is used to act on a transmission component; a bearing is arranged inside the pulley body 1. The bearing includes an inner ring 22 and an outer ring 21. The pulley body 1 is relatively fixed to the outer ring 21 of the bearing and can rotate around the axis of the bearing. The inner ring 22 of the bearing is relatively fixed to the base 3 after assembly, for sleeving the pulley on the base 3; a bolt 4 includes a screw rod part 41 that is in threaded cooperation with the base 3 and a flange part 42 that presses on the inner ring 22 of the bearing; a spacer 5 is further arranged between the flange part 42 and the inner ring 22 of the bearing. The spacer 5 includes an embedding part 52 with a smaller diameter and a ring pressing part 51 with a larger diameter. The embedding part 52 and the ring pressing part 51 are combined to form a step on the axial side facing the inner ring 22 of the bearing.
[0013] The ring pressing part of the spacer 5 includes two axial end faces. The first axial end face is pressed by the flange part 42 of the bolt 4, and the second axial end face presses on the axial end face of the inner ring 22 of the bearing. The embedding part 52 is embedded inside the radial inner side of the inner ring 22 of the bearing. Referring to the drawings, the outer diameter of the flange part 42 of the bolt 4 is smaller than the inner diameter of the inner ring 22 of the bearing. Without the spacer 5, the bolt 4 cannot hold the pulley body and the bearing on the base 3. After setting the spacer 5, even if the diameter of the flange part 42 of the bolt 4 is smaller than the inner diameter of the inner ring of the bearing, the pulley body and the bearing can still be fixed on the base; further, even if the diameter of the flange part 42 is equal to or slightly larger than the diameter of the inner ring of the bearing, in the case where the original bearing and bolt sizes do not match, the two can be made to cooperate with each other by setting the spacer. Therefore, existing pulley bodies, bearings, and bolts in other projects can be used in new products, reducing the production and manufacturing costs, accelerating the production speed, and eliminating the need to manage various bolts, bearings, and other components. The pulley assembly further includes a dust cover 6, and the radial inner side of the dust cover is clamped between the second axial end face and the inner ring 22 of the bearing.
[0014] The above technical solutions are only descriptions of the embodiments of the present utility model and do not limit the present utility model. Any equivalent changes made by those skilled in the art according to the creation of the present utility model fall within the protection scope of the present utility model.
Claims
1. A pulley assembly, comprising: A pulley body, which is cylindrical and is used to act on a transmission member; A bearing, which is arranged inside the pulley body. The bearing includes an inner ring and an outer ring. The pulley body is relatively fixed to the outer ring of the bearing and can rotate around the axis of the bearing. The inner ring of the bearing is relatively fixed to the base after assembly, and is used to sleevethe pulley on the base; A bolt, comprising a screw rod portion threadedly engaged with a base and a flange portion pressing against an inner ring of a bearing; characterized in that: A spacer is further arranged between the flange portion and the inner ring of the bearing. The first axial end face of the spacer is pressed by the flange portion of the bolt, and the second axial end face of the spacer is pressed on the inner ring of the bearing.
2. The pulley assembly according to claim 1, wherein: The spacer includes an embedding portion with a smaller diameter and a ring pressing portion with a larger diameter.
3. The pulley assembly according to claim 2, wherein: The embedding portion and the ring pressing portion of the spacer are combined to form a step on the axial side facing the inner ring of the bearing.
4. The pulley assembly according to claim 2, wherein: The embedding portion is embedded in the radial inner side of the inner ring of the bearing.
5. The pulley assembly according to claim 2, characterized in that: The first and second axial end faces are arranged on the ring pressing portion, and the ring pressing portion presses on the axial end face of the inner ring of the bearing through the second axial end face.
6. The pulley assembly according to claim 2, characterized in that: It further includes a dust cover, and the radial inner side of the dust cover is clamped between the second axial end face and the inner ring of the bearing.