Automatic tensioning wheel without mandrel and damping unit
Through the design of mandrel-free damping unit, the sliding bearing and spring generate damping torque, which solves the problems of high design costs and narrow space matching in the prior art, and realizes the function of the automatic tensioning wheel to reduce costs and space adaptability.
Patent Information
- Application Number
- CN202422512247.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-10-17
AI Technical Summary
In the existing automatic tensioner design, independent mandrels and damping units increase design costs and are not conducive to system matching in tight spaces.
The design of the mandrel-free damping unit is adopted. Through the cooperation of the wheel rocker arm and the tensioning mechanism, the sliding bearing and spring generate a damping torque, which cancels the mandrel and damping unit to achieve the automatic tensioning function.
Reduces design costs while meeting the system design needs of small spaces.
Smart Images
Figure CN223063070U_ABST
Abstract
Description
Technical Field:
[0001] The utility model belongs to the technical field of the processing of an automatic tensioner for an internal combustion engine accessory belt system, and particularly relates to an automatic tensioner without a core shaft and a damping unit. Background Art:
[0002] An automatic tensioner is an important component of an internal combustion engine accessory belt system. In order to achieve the tensioning function, an independent core shaft and a damping unit mechanism are basically arranged in the automatic tensioner.
[0003] The design of an independent core shaft and a damping unit mechanism not only has a high design cost, but also increases the radial dimension of the automatic tensioner, which is not conducive to the system design and matching in some narrow spaces.
[0004] The information disclosed in this background art section is only intended to enhance the overall understanding of the utility model and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model:
[0005] The purpose of the utility model is to provide an automatic tensioner without a core shaft and a damping unit, thereby overcoming the defects in the above-mentioned prior art.
[0006] To achieve the above purpose, the utility model provides an automatic tensioner without a core shaft and a damping unit, which includes a wheel rocker arm, a tensioning mechanism, and a pulley mechanism; the tensioning mechanism and the pulley mechanism are arranged on the wheel rocker arm; an installation part is arranged on the wheel rocker arm, a tapered hole is arranged inside the installation part, and an upper groove is arranged on the periphery of the installation part; the tensioning mechanism includes a sliding bearing, a base, and a spring. The sliding bearing is of a tapered structure, a connecting part is arranged on the base, the structure of the connecting part is matched with that of the sliding bearing, the sliding bearing is fixed on the connecting part to form an integral structure, a lower groove is arranged on the base outside the connecting part, the tapered hole is buckled on the outer side surface of the sliding bearing, the connecting part is connected with the installation part through bolts, and the spring is arranged between the upper groove and the lower groove; the spring generates an axial force through rotation, the axial force makes the inner side surface of the tapered hole closely contact with the outer side surface of the sliding bearing, and a circumferential frictional force is generated between the inner side surface of the tapered hole and the outer side surface of the sliding bearing to form a damping moment.
[0007] Preferably, in the technical solution, an inner key is arranged on the inner side surface of the sliding bearing, and a corresponding key groove is arranged at the corresponding position on the outer side surface of the connecting part. The sliding bearing is fixed on the connecting part through the cooperation of the inner key and the key groove.
[0008] Preferably, in the technical solution, limits are arranged in the upper groove and the lower groove, and both ends of the spring respectively abut against the limits in the upper groove and the lower groove.
[0009] Preferably, in the technical solution, the angular positions at both ends of the adjusting spring are adjusted to change the working angle of the spring. The effective number of turns of the spring rotation changes, thereby changing the spring torque.
[0010] Compared with the prior art, the present utility model has the following beneficial effects:
[0011] Through the cooperation between the wheel rocker arm and the tensioning mechanism, after canceling the mandrel and the damping unit, all the functions of the automatic tensioning wheel can still be achieved, greatly reducing the design cost, and at the same time, it can also meet the system design matching in a narrow space. BRIEF DESCRIPTION OF THE DRAWINGS:
[0012] Figure 1 It is a schematic top view structure diagram of the automatic tensioning wheel without a mandrel and a damping unit of the present utility model;
[0013] Figure 2 It is a schematic bottom view structure diagram of the automatic tensioning wheel without a mandrel and a damping unit of the present utility model;
[0014] Figure 3 It is a top view of the automatic tensioning wheel without a mandrel and a damping unit of the present utility model;
[0015] Figure 4 It is Figure 3 a sectional view taken along the line A-A of
[0016] Figure 5 It is a schematic structure diagram of the sliding bearing of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS:
[0017] The following is a detailed description of the specific embodiments of the present utility model, but it should be understood that the protection scope of the present utility model is not limited by the specific embodiments.
[0018] Unless otherwise clearly stated, in the whole specification and claims, the term "comprising" or its variations such as "including" or "having" etc. will be understood to include the stated elements or components, without excluding other elements or other components.
[0019] Such as Figures 1-5As shown, an automatic tensioner without a mandrel and a damping unit includes a wheel rocker arm 1, a tensioning mechanism 2, and a pulley mechanism 3. The tensioning mechanism 2 and the pulley mechanism 3 are arranged on the wheel rocker arm 1. An installation part 10 is arranged on the wheel rocker arm 1. A tapered hole 11 is arranged inside the installation part 10, and an upper groove 12 is arranged on the periphery of the installation part 10. The tensioning mechanism 2 includes a sliding bearing 20, a base 21, and a spring 22. The sliding bearing 20 is of a tapered structure. A connecting part 23 is arranged on the base 21. The structure of the connecting part 23 is matched with that of the sliding bearing 20. An inner key 24 is arranged on the inner side surface of the sliding bearing 20, and a corresponding key groove is arranged at the corresponding position on the outer side surface of the connecting part 23. Through the cooperation of the inner key 24 and the key groove, the sliding bearing 20 is fixed on the connecting part 23 to form an integral structure. A lower groove 25 is arranged on the base around the connecting part 23. The tapered hole 11 is buckled on the outer side surface of the sliding bearing 20. The connecting part 23 is connected to the installation part 10 through a bolt 26. The spring 22 is abutted between the upper groove 12 and the lower groove 25. Upper and lower limits 13 and 27 are respectively arranged in the upper groove 12 and the lower groove 25. Two ends of the spring 22 are respectively abutted against the upper limit 13 and the lower limit 27. By adjusting the angular positions of the two ends of the spring 22 and changing the working angle of the spring 22, the number of effective turns of the spring 22 in rotation changes, and thus the spring torque is changed. The spring 22 generates an axial force through rotation. The axial force makes the inner side surface of the tapered hole 11 closely contact with the outer side surface of the sliding bearing 20, and a circumferential frictional force is generated between the inner side surface of the tapered hole 11 and the outer side surface of the sliding bearing 20, forming a damping torque. Through the cooperation of the wheel rocker arm and the tensioning mechanism, after canceling the mandrel and the damping unit, all the functions possessed by the automatic tensioner can still be realized, greatly reducing the design cost, and at the same time, it can also meet the system design matching in a narrow space.
[0020] The foregoing description of the specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations are possible in light of the above teaching. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize various different exemplary embodiments of the present invention, as well as various different selections and changes. The scope of the present invention is intended to be defined by the claims and their equivalents.
Claims
1. An automatic tensioner without a mandrel and a damping unit, characterized in that: It includes a wheel rocker arm, a tensioning mechanism, and a pulley mechanism; the tensioning mechanism and the pulley mechanism are arranged on the wheel rocker arm; an installation part is arranged on the wheel rocker arm, a tapered hole is arranged inside the installation part, and an upper groove is arranged on the periphery of the installation part; the tensioning mechanism includes a sliding bearing, a base, and a spring. The sliding bearing is of a tapered structure. A connecting part is arranged on the base, and the structure of the connecting part is matched with the sliding bearing. The sliding bearing is fixed on the connecting part to form an integral structure. A lower groove is arranged on the base outside the connecting part. The tapered hole is buckled on the outer side surface of the sliding bearing. The connecting part is connected to the installation part through bolts. The spring is placed between the upper groove and the lower groove; the spring generates an axial force through rotation, and the axial force makes the inner side surface of the tapered hole closely contact with the outer side surface of the sliding bearing, and a circumferential friction force is generated between the inner side surface of the tapered hole and the outer side surface of the sliding bearing, forming a damping torque.
2. The automatic tensioner of the coreless and dampedless unit according to claim 1, wherein: An inner key is arranged on the inner side surface of the sliding bearing, and a corresponding key groove is arranged at the corresponding position on the outer side surface of the connecting part. The sliding bearing is fixed on the connecting part through the cooperation of the inner key and the key groove.
3. The automatic tensioner of the coreless and dampedless unit according to claim 2, wherein: Limiters are arranged in the upper groove and the lower groove, and the two ends of the spring respectively abut against the limiters in the upper groove and the lower groove.
4. The automatic tensioner of the coreless and dampedless unit according to claim 3, wherein: Adjust the angular positions of the two ends of the spring to change the working angle of the spring. The effective number of turns of the spring rotation changes, thereby changing the spring torque.