Ultra-miniature high-speed motor bearing

Abstract

The utility model discloses a kind of ultra-micro high-speed motor bearings, including first bearing and second bearing, the first bearing and second bearing adopt DB pairing assembly, the first bearing and second bearing are all included: inner ring, outer ring and several rolling bodies, several The rolling bodies are located in the rolling track opened in inner ring and outer ring, and are full of rolling track, sealing structure is further provided between the inner ring and outer ring, and the sealing structure is used to isolate the grease of speed reducer not to leak to bearing. Relative to prior art, the bearing can realize stable operation under high-speed operation, improve the performance and life of motor.

Description

Technical Field

[0001] This utility model relates to the field of robot joint components technology, and in particular to a miniature high-speed motor bearing. Background Technology

[0002] With the continuous development of robotics technology, the requirements for miniaturization and high speed of motors are increasing. In the ultra-miniature high-speed motors of robot finger joints, bearings are key components, and their performance directly affects the motor's operating efficiency, stability, and lifespan. Existing ordinary bearing structures cannot meet the special needs of ultra-miniature high-speed motors. During the miniaturization process, traditional bearings struggle to effectively bear both axial and radial forces. In particular, when the ratio of axial to radial force reaches a certain value, ordinary bearings are prone to deformation, accelerated wear, and decreased precision, leading to motor malfunction and severely limiting the application of robots in high-precision, high-speed working scenarios.

[0003] Therefore, this utility model needs to provide a method that, through unique structural design and material selection, meets the requirements of microstructures, while effectively bearing a specific ratio (100N:300N) of radial and axial forces, achieving stable operation at high speeds, and improving the performance and lifespan of the motor. Utility Model Content

[0004] The purpose of this invention is to provide a miniature high-speed motor bearing, thereby solving the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A miniature high-speed motor bearing includes a first bearing and a second bearing, which are assembled in a DF pair. Both the first bearing and the second bearing include an inner ring, an outer ring, and a plurality of rolling elements. The plurality of rolling elements are located in and fill the raceways of the inner ring and the outer ring. A sealing structure is also provided between the inner ring and the outer ring to prevent grease from the reducer from leaking into the bearing.

[0007] Furthermore, the rolling element is a ceramic ball.

[0008] Furthermore, the sealing structure includes at least one sealing ring and a fixing member, wherein the sealing ring is fixed between the inner ring and the outer ring by the fixing member.

[0009] Furthermore, the fastener is a metal ring with an opening.

[0010] Furthermore, the inner surface of the outer ring is provided with a first groove and a second groove, the first groove being used for a sealing ring and the second groove being used for installing a fastener.

[0011] Furthermore, the height of the first groove is higher than the height of the second groove, and the first groove and the second groove form a stepped structure.

[0012] Furthermore, the wall widths of the inner and outer rings are divided into b1 and b2, centered on the raceway center of the inner and outer rings, where b1 > b2.

[0013] Furthermore, the sealing ring is made of a nanoscale sealing film.

[0014] Furthermore, a lubricating film is provided on the outer surfaces of the rolling element and the raceway.

[0015] Furthermore, a ball-loading locking opening is provided on the inner ring.

[0016] The beneficial effects of this utility model are:

[0017] This invention incorporates a sealing structure between the inner and outer rings. This sealing structure primarily prevents grease from leaking into the bearings, thus accommodating complex load requirements such as 300N axial force and 100N radial force. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the miniature high-speed motor bearing of this utility model;

[0019] Figure 2 This is a structural diagram of the micro high-speed motor bearing of this utility model;

[0020] Figure 3 This is a cross-sectional view of the elbow joint bearing of this utility model;

[0021] Figure 4 This is a utility model Figure 3 Enlarged view of point D in the middle.

[0022] Figure label:

[0023] 1. First bearing; 2. Second bearing; 3. Inner ring; 4. Outer ring; 5. Rolling element; 6. Sealing ring; 7. Fixing element; 8. First groove; 9. Second groove. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0025] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0028] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0029] like Figures 1 to 2 As shown, a miniature high-speed motor bearing includes a first bearing 1 and a second bearing 2. The first bearing 1 and the second bearing 2 are assembled in a DF pair with a contact angle of α, where the angle of α is 15°. Both the first bearing 1 and the second bearing 2 include an inner ring 3, an outer ring 4, and a plurality of rolling elements 5. The plurality of rolling elements 5 are located in and fill the raceways of the inner ring 3 and the outer ring 5. A sealing structure is also provided between the inner ring 3 and the outer ring 4. The sealing structure is used to prevent grease from the reducer from leaking into the bearing. In this embodiment, the rolling elements 5 are ceramic balls. Because they are made of ceramic steel, the rolling elements have high hardness, which can effectively resist the wear between the rolling elements and the raceways and extend the service life of the bearing. At the same time, their low density characteristics help to reduce the overall rotational inertia of the motor and improve the response speed and efficiency of the motor.

[0030] As can be seen from the above, the sealing structure between the inner ring 3 and the outer ring 4 is mainly used to prevent the grease from the reducer from leaking into the bearing. The bearing load ratio is radial to axial = 100N:300N, to meet the requirements of a complex load of 300N axial force and 100N radial force. The bearing clearance C = clearance + 9µm shrinkage = 8 + 9 ~ 14 + 9 = 17 ~ 23µm.

[0031] Specifically, such as Figure 1 As shown, the sealing structure includes a sealing ring 6 and a fixing member 7. The sealing ring 6 is fixed between the inner ring 3 and the outer ring 4 by the fixing member 7. Specifically, the fixing member 7 is installed on the outer surface of the sealing ring 6 and at one end near the outer ring. In this embodiment, the fixing member 7 is a metal ring with an opening.

[0032] To install the sealing ring 6 and the fastener 7, the inner surface of the outer ring 4 is also provided with a first groove 8 and a second groove 9. The first groove 8 is used for the sealing ring 6, and the second groove 9 is used for installing the fastener 7. The height of the first groove 8 is higher than the height of the second groove 9. The first groove 8 and the second groove 9 form a stepped structure. Due to the use of stepped grooves, a better sealing effect is ensured, which can effectively block the intrusion of external impurities and prevent the leakage of lubricating gas, thus ensuring the cleanliness and good lubrication environment inside the bearing.

[0033] Furthermore, it should be noted that the wall widths of the inner ring 3 and the outer ring 4 are divided into b1 and b2, with the raceway center of the inner ring 3 and the outer ring 4 as the center, where b1 > b2. The inner ring 3 and the outer ring 4 are eccentrically arranged inside to facilitate the installation of the sealing structure.

[0034] Furthermore, the inner ring 3 is provided with a ball-loading locking slot to accommodate the assembly of full ceramic balls.

[0035] In addition, it should be noted that the sealing ring 6 adopts a nano-scale sealing film, and a lubricating film is also provided on the outer surface of the rolling element and the raceway. In actual production, lubricating gas is injected into the bearing, and then a specific lubricating gas is injected into the bearing to form an extremely thin but uniform lubricating film on the surface of the rolling element and the raceway. This can meet the lubrication requirements under ultra-high speed operation without increasing resistance and heat accumulation due to excessive lubricant.

[0036] In addition, at least one nanoscale sealing film is used between the inner ring 3 and the outer ring 4. These films have excellent flexibility and wear resistance, which can effectively block the intrusion of external impurities, prevent lubricating gas leakage, and ensure a clean and good lubrication environment inside the bearing.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A miniature high-speed motor bearing, characterized in that, The bearing includes a first bearing and a second bearing, which are assembled in a DF pair. Both the first bearing and the second bearing include an inner ring, an outer ring, and a plurality of rolling elements. The plurality of rolling elements are located in and fill the raceways of the inner and outer rings. A sealing structure is also provided between the inner and outer rings. The sealing structure is used to prevent the grease of the reducer from leaking into the bearing. The rolling elements are ceramic balls.

2. The miniature high-speed motor bearing according to claim 1, characterized in that: The sealing structure includes at least one sealing ring and a fixing member, wherein the sealing ring is fixed between the inner ring and the outer ring by the fixing member.

3. The miniature high-speed motor bearing according to claim 2, characterized in that: The fastener is a metal ring with an opening.

4. The miniature high-speed motor bearing according to claim 1, characterized in that: The inner surface of the outer ring is also provided with a first groove and a second groove. The first groove is used for the sealing ring, and the second groove is used for installing the fastener.

5. The miniature high-speed motor bearing according to claim 4, characterized in that: The height of the first groove is higher than the height of the second groove, and the first groove and the second groove form a stepped structure.

6. The miniature high-speed motor bearing according to claim 1, characterized in that: The wall widths of the inner and outer rings are divided into b1 and b2, with the raceway center of the inner and outer rings as the center, where b1 > b2.

7. The miniature high-speed motor bearing according to claim 6, characterized in that: The inner ring is provided with a ball-loading locking port.

8. The miniature high-speed motor bearing according to claim 5, characterized in that: The sealing ring is made of a nanoscale sealing film.

9. The miniature high-speed motor bearing according to claim 1, characterized in that: A lubricating film is also provided on the outer surface of the rolling element and the raceway.

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