Rotor with tolerance ring
By setting a tolerance ring assembly between the bearing housing and the rotor, the gap design problem was solved, the rotor's operating accuracy and thermal expansion were improved, and the manufacturing difficulty and risk of thermal damage were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAIZHOU YIJU MECHANICAL & ELECTRIC PROD
- Filing Date
- 2025-03-05
- Publication Date
- 2026-05-12
AI Technical Summary
In existing technologies, the gap design between the bearing housing and the rotor is difficult to control precisely, leading to decreased operating accuracy, increased vibration, poor lubrication, and the risk of thermal damage. The manufacturing process is also complex and costly.
A tolerance ring assembly is provided between the bearing housing and the rotor, including two support rings and a corrugated sidewall with alternating crests and troughs, providing expansion space and transition sections to improve thermal compensation capability.
简化制造工艺，降低成本，提高转子运转精度和抗热膨胀性，减少热损坏风险，增强密封性能。
Smart Images
Figure CN224233413U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of water pump manufacturing technology, and specifically relates to a rotor with a tolerance ring. Background Technology
[0002] In the manufacturing process of electric motors, a gap is left between the bearing housing and the rotor to ensure a proper fit. This gap also accommodates thermal expansion, as bearings generate heat during operation, causing both the bearing and shaft to expand. The pre-designed gap prevents bearing seizure or damage due to thermal expansion. Maintaining a precise gap requires advanced manufacturing techniques and presents a significant challenge for manufacturers. A large gap reduces rotor operating accuracy, increases vibration, causes energy loss, and accelerates bearing wear, affecting service life. A gap that is too small leads to poor lubrication, generating excessive heat and potentially causing thermal damage to the bearing. Conversely, an excessively large gap makes it difficult for lubricant to form an effective oil film on the friction surfaces, resulting in poor heat dissipation and also posing a risk of thermal damage. Utility Model Content
[0003] The purpose of this invention is to address the aforementioned problems in the prior art by providing a rotor with a tolerance ring.
[0004] The objective of this utility model can be achieved through the following technical solution: a rotor with a tolerance ring, comprising a rotor body and a bearing housing, wherein a tolerance ring assembly is provided between the rotor body and the bearing housing.
[0005] The working principle of this utility model is as follows: a tolerance ring assembly is set between the bearing housing and the rotor output shaft. The tolerance ring assembly reduces the difficulty of the manufacturing process. At the same time, when the tolerance ring heats up and expands, it will not affect the bearing and the rotor output shaft, thus preventing thermal damage.
[0006] In the aforementioned rotor with tolerance rings, the tolerance ring assembly includes two support rings and a sidewall, the sidewall being used to connect the two support rings. In the aforementioned rotor with tolerance rings, the sidewall is wavy.
[0007] In the aforementioned rotor with tolerance ring, the sidewall comprises multiple alternating crests and troughs, which extend along the axial direction of the sidewall.
[0008] In the aforementioned rotor with tolerance ring, a transition section is provided between the crests and troughs.
[0009] In the aforementioned rotor with tolerance ring, the crests, transition sections, and troughs are integrated and connected.
[0010] Compared with the prior art, this utility model has the advantage of good resistance to thermal expansion. Attached Figure Description
[0011] Figure 1 is a structural schematic diagram of this utility model.
[0012] Figure 2 is a cross-sectional structural diagram of this utility model.
[0013] Figure 3 is a schematic diagram of the tolerance ring of this utility model.
[0014] Figure 4 is a cross-sectional structural diagram of the tolerance ring assembly of this utility model.
[0015] In the figure, 1 is the rotor body; 2 is the bearing housing; 3 is the tolerance ring assembly; 4 is the support ring; 5 is the side wall; 6 is the crest; 7 is the trough; and 8 is the transition section. Detailed Implementation
[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0017] As shown in Figure 1- Figure 4 As shown, this rotor with a tolerance ring includes a rotor body and a bearing housing, and a tolerance ring assembly is provided between the rotor body and the bearing housing.
[0018] To elaborate further, the tolerance ring assembly includes two support rings and a sidewall. The sidewall connects the two support rings, and the two support rings also serve a sealing function to reduce the entry of external dust particles into the rotor.
[0019] To elaborate further, the sidewalls are wavy, consisting of multiple alternating crests and troughs. These crests and troughs extend axially along the sidewalls, creating internal expansion space while saving costs and allowing for deformation into different sizes and shapes during assembly. Furthermore, transition sections are provided between the crests and troughs, improving fatigue life and enhancing thermal compensation capabilities.
[0020] To elaborate further, the integrated connection of the crests, transition sections, and troughs improves the overall structural performance of the sidewalls and simplifies the installation process.
[0021] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
[0022] Although this document uses a large number of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.
Claims
1. A rotor with a tolerance ring, characterized in that, It includes a rotor body (1) and a bearing housing (2), and a tolerance ring assembly (3) is provided between the rotor body and the bearing housing (2).
2. A rotor with a tolerance ring according to claim 1, characterized in that, The tolerance ring assembly (3) includes two support rings (4) and a sidewall (5), the sidewall (5) being used to connect the two support rings (4).
3. A rotor with a tolerance ring according to claim 2, characterized in that, The sidewall (5) is wavy.
4. A rotor with a tolerance ring according to claim 3, characterized in that, The sidewall (5) consists of multiple alternating peaks (6) and troughs (7), which extend along the axial direction of the sidewall (5).
5. A rotor with a tolerance ring according to claim 4, characterized in that, A transition section (8) is provided between the crest (6) and the trough (7).
6. A rotor with a tolerance ring according to claim 5, characterized in that, The peak (6), transition section (8), and trough (7) are connected in an integrated manner.