Miniature motor bearing with dustproof structure

Abstract

The utility model discloses a miniature motor bearing with a dustproof structure, which relates to the technical field of miniature bearings and comprises an outer ferrule and an inner ferrule mounted inside the outer ferrule. A first mounting groove and a fixing groove are formed in the inner side of the top of the outer ferrule, the fixing groove is located in the outer side of the top of the first mounting groove, a metal cover plate is connected into the first mounting groove in a clamped mode, an elastic positioning ring is connected into the fixing groove in a clamped mode, and the elastic positioning ring is in surface contact with the outer side of the top of the metal cover plate. A second mounting groove is formed in the outer side of the top of the inner ferrule, and a rubber cover plate is connected into the second mounting groove in a clamped mode. According to the micro motor bearing with the dustproof structure, an axial detachable sealing interface is realized through a clamping type mounting structure of the metal cover plate and pre-tightening force control of the elastic positioning ring, and during maintenance, the metal cover plate can be taken out in the axial direction to complete oil injection operation only by releasing constraint of the elastic positioning ring; and the problem of destructive disassembly of a traditional welding sealing cover is avoided.

Description

Technical Field

[0001] This utility model relates to the field of micro bearing technology, specifically a micro motor bearing with a dustproof structure. Background Technology

[0002] Bearings are key components in micro motors, and their main function is to support the motor rotor so that it can rotate smoothly and efficiently.

[0003] To achieve the above functions, a Chinese patent (publication number: CN209671409U) discloses a micro motor bearing with a novel dust cover, including an inner bearing ring, a dust cover mechanism, a damping ring, an outer bearing ring, a sealing ring, bearing balls, and a ball cage. The dust cover mechanism provides a good sealing effect, effectively preventing the entry of external dust and ensuring the overall torque bearing strength of the bearing. The sealing ring seals the gap between the outer and inner bearing rings, preventing dust from entering the ball cage and bearing balls, causing dry wear and abnormal noise, and preventing lubricating oil leakage and contamination. The damping ring, fitted into an open groove, effectively absorbs the vibration generated by the bearing during operation, reducing noise and preventing imprecise fit caused by bearing vibration.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist during their operation: dust entering the bearing can easily affect its rotation. Therefore, bearings are generally protected from dust by dust covers. However, existing bearing dust covers are not easy to remove, making it difficult to add lubricating oil to the bearing. Utility Model Content

[0005] The purpose of this invention is to provide a miniature motor bearing with a dustproof structure, so as to solve the problem in the background art that the bearing dust cover is inconvenient to remove, thus making it inconvenient to add lubricating oil to the bearing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a micro motor bearing with a dustproof structure, comprising an outer ring and an inner ring, wherein the inner ring is installed inside the outer ring;

[0007] The outer sleeve has a first mounting groove and a fixing groove on the inner side of the top, and the fixing groove is located on the outer side of the top of the first mounting groove. A metal cover plate is engaged inside the first mounting groove, and an elastic positioning ring is engaged inside the fixing groove. The elastic positioning ring forms a surface contact with the outer side of the top of the metal cover plate.

[0008] Preferably, the inner ring has a second mounting groove on the outer side of its top, and a rubber cover plate is engaged inside the second mounting groove. The rubber cover plate is located inside the metal cover plate, and the inner side of the metal cover plate maintains a gap with the outer side of the inner ring.

[0009] Preferably, an inner dustproof ring is fixedly connected to the inner side of the bottom of the outer ring, and the bottom of the inner dustproof ring has three concentric inner isolation rings integrally formed.

[0010] Preferably, an outer dustproof ring is fixedly connected to the bottom outer side of the inner ring, and the top of the outer dustproof ring has two concentric outer isolation rings integrally formed.

[0011] Preferably, the outer and inner isolation rings are staggered, and the gap between the inner and outer dustproof rings forms a continuous S-shaped channel.

[0012] Preferably, the inner side of the outer ring and the outer side of the inner ring are provided with relatively aligned rolling grooves, and a steel ball is assembled between the two rolling grooves.

[0013] Preferably, the steel balls are distributed in a ring at equal intervals between the outer and inner rings, and a nylon retainer is installed on the outside of the steel balls.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This micro motor bearing with a dustproof structure achieves an axially detachable sealing interface through the snap-fit ​​installation structure of the metal cover and the pre-tightening force control of the elastic positioning ring. During maintenance, only the constraint of the elastic positioning ring needs to be released to remove the metal cover axially to complete the oiling operation, avoiding the destructive disassembly problem of traditional welded sealing covers.

[0016] Through the coordinated operation of the inner and outer dustproof rings, a continuous S-shaped sealing channel is formed by the staggered arrangement of three inner isolation rings and two outer isolation rings, and dynamic dust prevention is achieved by combining the grease guiding characteristics of the cage. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the outer ring structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the inner ring structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the collar of this utility model;

[0022] Figure 6 This is a schematic diagram of the cage structure of this utility model.

[0023] In the diagram: 1. Outer ring; 2. Inner ring; 3. First mounting groove; 4. Fixing groove; 5. Metal cover plate; 6. Elastic positioning ring; 7. Second mounting groove; 8. Rubber cover plate; 9. Inner dustproof ring; 10. Inner isolation ring; 11. Outer dustproof ring; 12. Outer isolation ring; 13. Rolling groove; 14. Steel ball; 15. Cage. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1 - Figure 6 This utility model provides the following technical solution: A micro motor bearing with a dustproof structure includes an outer ring 1 and an inner ring 2, the inner ring 2 being installed inside the outer ring 1; the top inner side of the outer ring 1 is provided with a first mounting groove 3 and a fixing groove 4, and the fixing groove 4 is located on the top outer side of the first mounting groove 3, a metal cover plate 5 is engaged inside the first mounting groove 3, and an elastic positioning ring 6 is engaged inside the fixing groove 4, and the elastic positioning ring 6 forms surface contact with the top outer side of the metal cover plate 5; the top outer side of the inner ring 2 is provided with a second mounting groove 7, and a rubber cover plate 8 is engaged inside the second mounting groove 7, and the rubber cover plate 8 is located inside the metal cover plate 5, with a gap maintained between the inner side of the metal cover plate 5 and the outer side of the inner ring 2; the outer ring 1 An inner dustproof ring 9 is fixedly connected to the inner side of the bottom, and the bottom of the inner dustproof ring 9 has three concentric inner isolation rings 10 integrally formed; an outer dustproof ring 11 is fixedly connected to the outer side of the bottom of the inner sleeve 2, and the top of the outer dustproof ring 11 has two concentric outer isolation rings 12 integrally formed; the outer isolation rings 12 and the inner isolation rings 10 are staggered, and the gap between the inner dustproof ring 9 and the outer dustproof ring 11 forms a continuous S-shaped channel; the inner side of the outer sleeve 1 and the outer side of the inner sleeve 2 are provided with relatively aligned rolling grooves 13, and steel balls 14 are assembled between the two rolling grooves 13; the steel balls 14 are distributed in a ring at equal intervals between the outer sleeve 1 and the inner sleeve 2, and a nylon retainer 15 is installed on the outer side of the steel balls 14.

[0026] The metal cover 5 is embedded in the first mounting groove 3 at the top of the outer ring 1, and its outer side is pressed and fixed by the elastic positioning ring 6 to form a rigid sealing interface. The inner side of the metal cover 5 has a reserved gap to avoid friction with the inner ring 2. The top of the metal cover 5 can be depressed by removing the elastic positioning ring 6, which makes it easier to remove the metal cover 5 and inject lubricating oil.

[0027] The rubber cover plate 8 is nested in the second mounting groove 7 at the top of the inner ring 2. It uses elastic deformation to tightly fit the inner edge of the metal cover plate 5, compensating for thermal expansion differences when the bearing is running at high speed, forming a flexible sealing barrier to intercept external dust, and at the same time preventing internal grease leakage.

[0028] At the bottom of the bearing, the inner dustproof ring 9 and the outer dustproof ring 11 form an S-shaped sealing channel through the staggered inner isolation rings 10 and outer isolation rings 12. The three inner isolation rings 10 at the bottom of the outer ring 1 and the two outer isolation rings 12 at the bottom of the inner ring 2 are arranged in concentric circles, so that the gap between the inner dustproof ring 9 and the outer dustproof ring 11 forms a continuous tortuous path. When external dust attempts to enter, it needs to go through five 90-degree turns. During this process, it is deposited due to inertial collision with the surface of the inner isolation ring 10 or the outer isolation ring 12. At the same time, the centrifugal force generated by the operation of the bearing throws the micro dust that has entered the channel outward along the S-shaped path, realizing the dynamic discharge of dust.

[0029] The removable nature of the metal cover plate 5 allows for the replenishment of grease without disassembling the bearing, avoiding damage to the sealing structure caused by frequent disassembly and assembly. The injected grease is evenly distributed on the surface of the steel ball 14 under the guidance of the nylon retainer 15. At the same time, the grease forms a viscous barrier in the S-shaped channel, enhancing the adsorption capacity for fine dust.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A micro motor bearing with a dustproof structure, comprising an outer ring (1) and an inner ring (2), wherein the inner ring (2) is installed inside the outer ring (1); Its features are: The outer sleeve (1) is provided with a first mounting groove (3) and a fixing groove (4) on the inner side of the top. The fixing groove (4) is located on the outer side of the top of the first mounting groove (3). A metal cover plate (5) is engaged inside the first mounting groove (3). An elastic positioning ring (6) is engaged inside the fixing groove (4). The elastic positioning ring (6) forms a surface contact with the outer side of the top of the metal cover plate (5).

2. A miniature motor bearing with a dustproof structure according to claim 1, characterized in that: The inner sleeve (2) has a second mounting groove (7) on the outer side of the top, and a rubber cover plate (8) is engaged inside the second mounting groove (7). The rubber cover plate (8) is located inside the metal cover plate (5), and the inner side of the metal cover plate (5) maintains a gap with the outer side of the inner sleeve (2).

3. A miniature motor bearing with a dustproof structure according to claim 2, characterized in that: The inner dustproof ring (9) is fixedly connected to the bottom inner side of the outer ring (1), and the bottom of the inner dustproof ring (9) is integrally formed with three concentric inner isolation rings (10).

4. A miniature motor bearing with a dustproof structure according to claim 3, characterized in that: The inner ring (2) is fixedly connected to the outer dustproof ring (11) on the bottom outer side, and the top of the outer dustproof ring (11) has two concentric outer isolation rings (12) integrally formed.

5. A miniature motor bearing with a dustproof structure according to claim 4, characterized in that: The outer isolation ring (12) and the inner isolation ring (10) are staggered, and the gap between the inner dustproof ring (9) and the outer dustproof ring (11) forms a continuous S-shaped channel.

6. A miniature motor bearing with a dustproof structure according to claim 1, characterized in that: The inner side of the outer ring (1) and the outer side of the inner ring (2) are provided with relatively aligned rolling grooves (13), and a steel ball (14) is assembled between the two rolling grooves (13).

7. A miniature motor bearing with a dustproof structure according to claim 6, characterized in that: The steel balls (14) are distributed in a ring at equal intervals between the outer ring (1) and the inner ring (2), and a nylon retainer (15) is installed on the outside of the steel balls (14).

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