Rolling bearing and low starting torque application method thereof
By designing a rolling bearing structure including an inner ring, an intermediate ring, an outer ring and a rolling element, the intermediate ring rotates with the transmission shaft and the rolling element turns oppositely, the problem of large friction torque when starting the existing rolling bearing is solved, and more efficient and precise rotational movement is achieved.
Patent Information
- Application Number
- CN202411782090.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-03-07
AI Technical Summary
Existing rolling bearings generate a large friction moment when starting, affecting the efficiency and accuracy of rotational motion.
A rolling bearing is designed, which includes an inner ring, an intermediate ring, an outer ring and a rolling element. The intermediate ring is coaxially sleeved outside the inner ring, the outer ring is coaxially sleeved outside the middle ring, and the rolling element is distributed between the inner ring and the middle ring and between the middle ring and the outer ring. With this structure, the intermediate ring rotates with the transmission shaft and the rolling element turns oppositely, reducing the frictional moment of the intermediate ring.
It effectively reduces the starting friction torque of the rolling bearing, improves the efficiency and accuracy of rotational movement, and reduces the impact of the friction torque on the transmission shaft and the intermediate ring.
Smart Images
Figure CN119572616A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of rolling bearings, and in particular to a rolling bearing and a method for using the rolling bearing with low starting torque. Background Art
[0002] Rolling bearings reduce friction through rolling motion between the rings and rolling elements, but the friction is not zero. For sensitive bearings, in order to reduce the friction torque, the geometric accuracy and surface roughness of rolling bearing parts are currently as good as possible, but the actual situation is that it is still impossible to eliminate very small friction torque; that is, as long as there is rotational motion (or a tendency to rotational motion), a friction torque that hinders the rotational motion will inevitably be generated.
[0003] When an object starts rotating from rest (e.g. clockwise), the bearing will generate a friction torque in the opposite direction of the rotation (counterclockwise), which is called the starting friction torque. As the rotation continues, the friction torque usually decreases, but does not become zero. The torque at this time is called the rolling friction torque. Usually, the rolling friction torque is smaller than the starting friction torque (analogous to the maximum static friction and sliding friction between sliding friction pairs). Summary of the invention
[0004] In order to reduce the starting torque of the bearing, the present application provides a rolling bearing and a method for using the same with low starting torque.
[0005] On the one hand, the present application provides a rolling bearing, which adopts the following technical solution: A rolling bearing comprises an inner ring, an intermediate ring, an outer ring and rolling elements. The middle ring is coaxially sleeved outside the inner ring, and the middle ring is used for connecting with the transmission shaft. The outer ring is coaxially sleeved outside the middle ring. There are a plurality of rolling bodies, and the rolling bodies are distributed between the inner ring and the middle ring, and between the middle ring and the outer ring.
[0006] By adopting the above technical solution, the middle ring rotates with the transmission shaft, and the rolling bodies on the inner and outer sides of the middle ring rotate in opposite directions, thereby reducing the friction torque on the middle ring.
[0007] Preferably, a single row of rolling elements is provided between the inner ring and the middle ring.
[0008] By adopting the above technical solution, the structure of the middle part of the rolling bearing is simple and easy to produce, use and maintain.
[0009] Preferably, a plurality of rows of rolling elements are provided between the middle ring and the outer ring.
[0010] By adopting the above technical solution, the carrying capacity is improved.
[0011] On the other hand, the present application also provides a method for using a rolling bearing with a low starting torque, which adopts the following technical solution: A method for using a rolling bearing with low starting torque, using the above-mentioned rolling bearing, comprising: Two rolling bearings are installed at both ends of the transmission shaft. The middle ring is coaxially fixedly connected to the transmission shaft.
[0012] By adopting the above technical solution, the middle ring rotates with the transmission shaft, and the rolling bodies on the inner and outer sides of the middle ring rotate in opposite directions, thereby reducing the friction torque on the middle ring.
[0013] Preferably, it also includes: The friction torque between the middle ring and the inner ring is M1, and the friction torque between the middle ring and the outer ring is M2, M2=M1.
[0014] By adopting the above technical solution, the rolling bodies on the inner and outer sides of the middle ring rotate in opposite directions, which can greatly reduce the friction torque on the middle ring.
[0015] Preferably, it also includes: The inner ring and the outer ring are both fixed.
[0016] The adoption of the above technical solution is conducive to maintaining high-precision positioning of the bearing.
[0017] In summary, the present application includes at least one of the following beneficial technical effects: 1. The transmission shaft and the middle ring are integrated through interference fit, which allows the middle rings at both ends to rotate independently relative to the outer ring; and the rolling elements between the transmission shaft and the middle ring and the outer ring rotate at the same speed but in opposite directions, reducing the friction torque. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic diagram of a rolling bearing.
[0019] Figure 2 It is a schematic diagram of the use of rolling bearings.
[0020] Explanation of the reference numerals: 1. inner ring; 2. middle ring; 3. outer ring; 4. rolling element; 5. mounting ring; 6. transmission shaft. DETAILED DESCRIPTION
[0021] The present application is further described in detail below in conjunction with the accompanying drawings.
[0022] Reference Figure 1 and Figure 2 An embodiment of the present application discloses a rolling bearing, comprising an inner ring 1, a middle ring 2, an outer ring 3 and rolling elements 4.
[0023] The middle ring 2 is coaxially sleeved outside the inner ring 1, and the middle ring 2 is used for connecting the transmission shaft 6. In the drawings of this embodiment: one end of the middle ring 2 is coaxially connected with a mounting ring 5, and the mounting ring 5 is used for coaxially fixed connection with the transmission shaft 6.
[0024] The outer ring 3 is coaxially sleeved outside the middle ring 2.
[0025] There are multiple rolling bodies 4, and the rolling bodies 4 are distributed between the inner ring 1 and the middle ring 2, and between the middle ring 2 and the outer ring 3. Specifically: a single row of rolling bodies 4 is provided between the inner ring 1 and the middle ring 2, and multiple rows of rolling bodies 4 are provided between the middle ring 2 and the outer ring 3. In the drawings of this embodiment: a double row of rolling bodies 4 is provided between the middle ring 2 and the outer ring 3.
[0026] The present application also discloses a method for using a rolling bearing with a low starting torque, including: Two rolling bearings are respectively installed at two ends of the transmission shaft 6 , and the middle ring 2 is coaxially fixedly connected to the transmission shaft 6 .
[0027] For one of the above rolling bearings, the following experiments were conducted to measure the starting friction torque using a torque meter and the rolling friction torque using a YZC-ⅡG bearing torque tester.
[0028] Experiment 1: The outer ring 3 is fixed and the middle ring 2 rotates freely. The starting friction torque of the inner ring 1 is measured to be 0.08-0.1 cN·m and the rolling friction torque is 0.02 cN·m; Experiment 2: The outer ring 3 is fixed and the inner ring 1 rotates freely. The starting friction torque of the middle ring 2 is measured to be 0.05 cN·m and the rolling friction torque is 0.005 cN·m. Experiment 3: Remove the inner ring 1, fix the outer ring 3, and measure the starting friction torque of the middle ring 2 to be 0.16 cN·m and the rolling friction torque to be 0.05 cN·m Experiment 4: Remove the outer ring 3, fix the middle ring 2, and measure the starting friction torque of the inner ring 1 to be 0.2 cN·m and the rolling friction torque to be 0.01 cN·m.
[0029] Preferably, the friction torque between the middle ring 2 and the inner ring 1 is M1, and the friction torque between the middle ring 2 and the outer ring 3 is M2, and M2=M1.
[0030] In this embodiment, the usage also includes: one of the inner ring 1 and the outer ring 3 is fixed and the other is freely rotating.
[0031] In another embodiment: the usage also includes that the inner ring 1 and the outer ring 3 both rotate, and the directions of the inner ring 1 and the outer ring 3 are opposite.
[0032] Preferably, when the middle ring 2 is stationary, the inner ring 1 and the outer ring 3 both rotate, and the directions of the inner ring 1 and the outer ring 3 are opposite. When the middle ring 2 rotates, the inner ring 1 and the outer ring 3 are both fixed.
[0033] Furthermore, when the middle circle 2 is stationary: In a rolling bearing, the inner ring 1 and the outer ring 3 both rotate, but the directions of the inner ring 1 and the outer ring 3 are opposite. In the two rolling bearings at both ends of the transmission shaft 6, the two inner rings 1 rotate in opposite directions.
[0034] The implementation principle of the low starting torque usage of a rolling bearing in the embodiment of the present application is as follows: the middle ring 2 rotates with the transmission shaft 6, and the rolling bodies 4 on the inner and outer sides of the middle ring 2 rotate in opposite directions, thereby reducing the friction torque on the middle ring 2; At the same time, the starting friction torque is converted into a rolling friction torque, thereby reducing the friction torque on the intermediate ring 2 and the transmission shaft 6.
[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A rolling bearing, characterized in that: It includes an inner ring (1), a middle ring (2), an outer ring (3) and rolling elements (4). The middle ring (2) is coaxially sleeved outside the inner ring (1), and the middle ring (2) is used for connection with the transmission shaft (6). The outer ring (3) is coaxially sleeved outside the middle ring (2). A plurality of rolling bodies (4) are provided, and the rolling bodies (4) are distributed between the inner ring (1) and the middle ring (2), and between the middle ring (2) and the outer ring (3).
2. The rolling bearing according to claim 1, characterized in that: A single row of rolling elements (4) is provided between the inner ring (1) and the middle ring (2).
3. The rolling bearing according to claim 1, characterized in that: A plurality of rows of rolling bodies (4) are provided between the middle ring (2) and the outer ring (3).
4. A method for using a rolling bearing with a low starting torque, using the rolling bearing according to claim 1, characterized in that: include: Two rolling bearings are installed at both ends of the transmission shaft (6). The middle ring (2) is coaxially fixedly connected to the transmission shaft (6).
5. The method for using a rolling bearing with low starting torque according to claim 4, characterized in that: Also includes: The friction torque between the middle ring (2) and the inner ring (1) is M1, and the friction torque between the middle ring (2) and the outer ring (3) is M2, where M2=M1.
6. The method for using a rolling bearing with low starting torque according to claim 4, characterized in that: Also includes: Of the inner ring (1) and the outer ring (3), one is fixed and the other is free to rotate.