Motor and fan
By using technical means such as elastic compressors, limit rings and lubricants in the motor, the noise problem caused by bearing wear is solved, and a more stable and silent motor operation is achieved.
Patent Information
- Application Number
- CN202420084370.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-12
AI Technical Summary
After the motor runs for a long time, the wear of the bearing leads to an increase in the play, causing the problem of increasing noise.
The elastic compressor preload is used to maintain the abutment between the support bearing and the guide bearing and the ball, the limiting ring limits the movement of the inner ring and the outer ring, the lubricant reduces friction, and the heat dissipation groove improves the heat dissipation efficiency.
It effectively reduces the noise during motor operation and improves the stability and silent performance of the motor.
Smart Images
Figure CN222169479U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of motor technology, and in particular to a motor and a fan. Background Art
[0002] The motor includes a base, a stator, a rotor and a rotating shaft. The rotor is connected to the rotating shaft, and the stator is connected to the base. The base is provided with a mounting hole for inserting the rotating shaft. Bearings are installed between the inner circumferential walls at both ends of the mounting hole and the circumferential wall of the rotating shaft to allow the rotating shaft to rotate relative to the base.
[0003] Regarding the above-mentioned related technologies, the bearing generally includes an inner ring, an outer ring and a ball disposed between the inner ring and the outer ring; when the shaft rotates, the inner ring of the bearing rotates relative to the outer ring through the ball. After the motor runs for a long time, wear is likely to occur between the inner ring and the ball, and between the ball and the outer ring, resulting in increased clearance of the bearing, which easily leads to collision between the inner ring or outer ring of the bearing and the ball, resulting in increased noise generated when the motor is running, so there is room for improvement. Utility Model Content
[0004] The purpose of the present application is to provide a motor and a fan to improve the problem of increased noise generated when the motor is running due to increased clearance of the motor's bearings.
[0005] In the first aspect, the present application provides a motor adopting the following technical solution:
[0006] A motor comprises a base, the base is provided with a rotor and a stator, the stator is connected to the base; the base is provided with a mounting hole along its own axial direction, a rotating shaft is inserted in the mounting hole, and the rotor is connected to the rotating shaft; the rotating shaft sleeve is provided with a support bearing and a guide bearing, the outer peripheral walls of the outer rings of the support bearing and the guide bearing are both abutted against the inner peripheral wall of the mounting hole; the inner peripheral wall of the mounting hole is provided with an abutment ring abutting against the outer ring of the guide bearing, and the abutment ring is located between the guide bearing and the support bearing; an elastic compression piece is provided in the mounting hole at a position between the abutment ring and the support bearing, one end of the elastic compression piece abuts against the abutment ring, and the other end abuts against the outer ring of the support bearing.
[0007] By adopting the above technical solution, the elastic compression member exerts a force on the outer ring of the support bearing to move the outer ring of the support bearing away from the abutment ring, i.e., a preload force. During the rotation of the shaft, when the support bearing or the guide bearing is worn, the preload force generated by the elastic compression member can keep the outer ring and the inner ring of the support bearing in abutment with the corresponding balls. At the same time, the outer ring of the guide bearing abuts with the abutment ring, and the inner ring of the support bearing drives the inner ring of the guide bearing to move synchronously through the shaft, so that the inner ring and the outer ring of the guide bearing can keep in abutment with the corresponding balls, thereby reducing the possibility of noise generated by collision between the balls of the support bearing or the guide bearing and the corresponding inner ring or outer ring, and reducing the noise during motor operation and improving the stability of motor operation.
[0008] Optionally, two limiting rings are provided on the peripheral wall of the rotating shaft, one of which abuts against the end wall of the inner ring of the guide bearing away from the support bearing, and the other limiting ring abuts against the end wall of the inner ring of the support bearing away from the guide bearing.
[0009] By adopting the above technical solution, the two limit rings cooperate with each other to limit the distance between the inner ring of the guide bearing and the inner ring of the support bearing, so that the inner ring of the support bearing can drive the inner ring of the guide bearing to move synchronously through the rotating shaft, which is beneficial to reduce the possibility of the inner ring of the support bearing or the inner ring of the guide bearing slipping relative to the peripheral wall of the rotating shaft.
[0010] Optionally, a mounting ring groove is provided on the peripheral wall of the rotating shaft at the position of the limiting ring along the circumference of the rotating shaft; a clearance gap is provided through the limiting ring along its thickness direction, and the inner side wall of the clearance gap is connected to the inner peripheral wall and the outer peripheral wall of the limiting ring; the limiting ring is elastic.
[0011] By adopting the above technical solution, the limiting ring is provided with a clearance notch, which is convenient for disassembling or installing the limiting ring, thereby facilitating the disassembly or assembly of the motor.
[0012] Optionally, the inner side wall of the clearance gap is inclined to be provided with a guide surface for abutting against the bottom wall of the mounting ring groove.
[0013] By adopting the above technical solution, when installing the limit ring, the guide surface is abutted against the bottom wall of the installation ring groove, and then the outer wall of the limit ring on the side away from the clearance gap is pressed, so that the limit ring can be deformed so that the limit ring can be inserted into the installation ring groove. The operation is simple, quick and labor-saving.
[0014] Optionally, a lubricant is provided between the outer circumferential wall of the outer ring of the support bearing and the inner circumferential wall of the mounting hole.
[0015] Optionally, an inner peripheral wall of the mounting hole is provided with an annular groove for accommodating lubricant along the circumference of the mounting hole.
[0016] By adopting the above technical solution, the lubricant located in the accommodating ring groove can reduce the friction between the outer ring of the support bearing and the inner circumferential wall of the mounting hole, thereby facilitating the sliding of the outer ring of the support bearing relative to the inner circumferential wall of the mounting hole.
[0017] Optionally, a heat dissipation groove is provided on the outer peripheral wall of the machine base located at the support bearing position along the length direction of the mounting hole, and a plurality of the heat dissipation grooves are arranged in sequence and spaced apart along the circumference of the machine base.
[0018] By adopting the above technical solution, the heat dissipation groove can increase the heat dissipation area of the machine base located at the support bearing position, thereby facilitating the rapid dissipation of heat generated during the sliding process of the outer ring of the support bearing.
[0019] In the second aspect, the present application provides a fan adopting the following technical solution:
[0020] A fan comprises an air guide cover, an impeller arranged in the air guide cover and the above-mentioned motor; the air guide cover is connected to a machine base, and the impeller is connected to a rotating shaft; the air guide cover is provided with an air inlet and an air outlet.
[0021] In summary, the present application includes at least one of the following beneficial technical effects:
[0022] 1. During the rotation of the shaft, the preload force generated by the elastic compression member can keep the outer ring and the inner ring of the support bearing in contact with the corresponding balls, and at the same time keep the inner ring and the outer ring of the guide bearing in contact with the corresponding balls, thereby reducing the possibility of noise generated by collision between the balls of the support bearing or the guide bearing and the corresponding inner ring or outer ring, and helping to reduce the noise during motor operation and improve the stability of motor operation;
[0023] 2. The two limiting rings cooperate with each other to limit the distance between the inner ring of the guide bearing and the inner ring of the support bearing, so that the inner ring of the support bearing can drive the inner ring of the guide bearing to move synchronously through the rotating shaft, which is beneficial to reduce the possibility of the inner ring of the support bearing or the inner ring of the guide bearing slipping relative to the peripheral wall of the rotating shaft;
[0024] 3. The lubricant in the accommodating ring groove can reduce the friction between the outer ring of the support bearing and the inner peripheral wall of the mounting hole, thereby facilitating the sliding of the outer ring of the support bearing relative to the inner peripheral wall of the mounting hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the overall structure of a motor according to an embodiment of the present application.
[0026] Figure 2 It is a cross-sectional schematic diagram used to show the connection structure between the rotating shaft and the base.
[0027] Figure 3 yes Figure 2 Enlarged view of part A in .
[0028] Figure 4 It is a schematic diagram for showing the overall structure of a fan according to an embodiment of the present application.
[0029] Figure 5 It is an exploded schematic diagram used to show the structure of the air duct.
[0030] In the figure, 1, machine base; 11, mounting hole; 111, abutment ring; 112, accommodating ring groove; 12, winding column; 13, end cover; 14, heat dissipation groove; 2, rotating shaft; 21, supporting bearing; 22, guide bearing; 23, elastic compression member; 24, limiting ring; 241, clearance gap; 242, guide surface; 25, mounting ring groove; 3, air guide cover; 31, semi-shell; 311, clearance hole; 3111, waterproof ring; 312, air inlet; 313, air outlet; 4, impeller. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given.
[0032] A motor, referring to Figure 1 and Figure 2 , including a base 1, the base 1 is provided with a mounting hole 11 along its axial direction, and the inner peripheral wall of the mounting hole 11 is integrally formed with an abutment ring 111. The base 1 is provided with a rotor (not shown in the figure), a stator (not shown in the figure) and a rotating shaft 2, and a plurality of winding posts 12 are welded and fixed to the outer peripheral wall of the base 1; the stator includes a coil, and the stator is wound on the winding posts 12; the rotor is embedded in the peripheral wall of the rotating shaft 2.
[0033] Reference Figure 2 , the rotating shaft 2 is inserted through the mounting hole 11, one end of the rotating shaft 2 is sleeved with a support bearing 21, and the other end of the rotating shaft 2 is sleeved with a guide bearing 22, and the guide bearing 22 is located on the side of the abutment ring 111 away from the support bearing 21. The outer peripheral wall of the outer ring of the guide bearing 22 is glued and fixed to the inner peripheral wall of the mounting hole 11, and the end wall of the guide bearing 22 close to the support bearing 21 abuts against the abutment ring 111. The rotating shaft 2 is provided with an elastic compression member 23, which includes a spring; the elastic compression member 23 is sleeved on the rotating shaft 2, and the elastic compression member 23 is located between the support bearing 21 and the abutment ring 111; one end of the elastic compression member 23 abuts against the abutment ring 111, and the other end of the elastic compression member 23 abuts against the end wall of the outer ring of the support bearing 21, and the elastic compression member 23 is in a compressed state.
[0034] Reference Figure 2, the inner rings of the support bearing 21 and the guide bearing 22 are clearance-fitted with the rotating shaft 2, and the peripheral wall of the rotating shaft 2 located at the side of the support bearing 21 away from the guide bearing 22 and the side of the guide bearing 22 away from the support bearing 21 is provided with a limit ring 24, and each limit ring 24 is used to abut against the end wall of the corresponding inner ring to limit the movement of the inner ring of the guide bearing 22 or the support bearing 21 relative to the rotating shaft 2, so that the inner ring and the outer ring of the support bearing 21 can be kept in abutment with the corresponding ball, and at the same time, the inner ring and the outer ring of the support bearing 21 can be kept in abutment with the corresponding ball, so as to improve the quietness and stability of the rotating shaft 2 when rotating. The end of the base 1 located at the guide bearing 22 is sleeved with an end cover 13, and the end cover 13 is fixedly connected to the winding column 12 by screws to block the corresponding end of the mounting hole 11. In another embodiment, the inner ring of the support bearing 21 or the guide bearing 22 can also be interference-fitted with the rotating shaft 2 or fixed by glue.
[0035] Reference Figure 3 , the peripheral wall of the rotating shaft 2 at the position of each limiting ring 24 is provided with an installation ring groove 25 along the circumference of the rotating shaft 2; the limiting ring 24 is an elastic steel ring, and the limiting ring 24 is provided with a clearance notch 241 along its thickness direction, the inner side wall of the clearance notch 241 is connected to the inner peripheral wall and the outer peripheral wall of the limiting ring 24, and a guide surface 242 is provided obliquely on one side of the inner side wall of the clearance notch 241 close to the outer peripheral wall of the limiting ring 24. The width of the clearance notch 241 is smaller than the diameter of the bottom wall of the installation ring groove 25; when installing the limiting ring 24, after the guide surface 242 is abutted against the bottom wall of the installation ring groove 25, the limiting ring 24 is pressed hard in the axial direction of the rotating shaft 2, and the limiting ring 24 is deformed by the force and automatically snapped into the installation ring groove 25, which is simple and quick to operate.
[0036] Reference Figure 3 The inner circumferential wall of the mounting hole 11 at the position of the support bearing 21 is provided with a receiving annular groove 112 along the circumference of the mounting hole 11, and the receiving annular groove 112 is filled with a lubricant (not shown in the figure), and the lubricant is grease; the lubricant is located between the outer circumferential wall of the outer ring of the support bearing 21 and the inner circumferential wall of the mounting hole 11, so as to facilitate the sliding of the outer ring of the support bearing 21 relative to the inner circumferential wall of the mounting hole 11.
[0037] Reference Figure 3 A heat dissipation groove 14 is provided on the outer peripheral wall of the base 1 at the position of the support bearing 21, and the length direction of the heat dissipation groove 14 is provided along the axial direction of the base 1; a plurality of heat dissipation grooves 14 are provided in sequence and spaced apart along the circumference of the base 1, so as to quickly dissipate the heat generated when the outer ring of the support bearing 21 slides.
[0038] The implementation principle of the embodiment of the present application is:
[0039] After the motor is assembled, the elastic compression member 23 is in a compressed state; during the rotation of the rotating shaft 2, when the inner ring, outer ring and ball of the support bearing 21 or the guide bearing 22 are worn, the preload force generated by the elastic compression member 23 can make the outer ring and the inner ring of the support bearing 21 maintain abutment with the corresponding ball. At the same time, the outer ring of the guide bearing 22 abuts against the abutment ring 111, and the inner ring of the support bearing 21 drives the inner ring of the guide bearing 22 to move synchronously through the rotating shaft 2, so that the inner ring and the outer ring of the guide bearing 22 maintain abutment with the corresponding ball, which is beneficial to reduce the possibility of noise generated by collision between the ball of the support bearing 21 or the guide bearing 22 and the corresponding inner ring or outer ring, and is beneficial to reduce the noise during motor operation and improve the stability of motor operation.
[0040] This embodiment also discloses a fan, referring to Figure 4 and Figure 5 , including an air guide cover 3, an impeller 4 and the above-mentioned motor. The air guide cover 3 includes two volute-shaped half shells 31, one of which is integrally formed with a through-hole 311 along its own axial direction, and the corresponding half shell 31 is fixedly connected to the end wall of the base 1 located at one end of the support bearing 21, and the corresponding end of the rotating shaft 2 is inserted through the through-hole 311; the other half shell 31 is fixedly connected to the aforementioned half shell 31 by screws, and the impeller 4 is located inside the area surrounded by the two half shells 31, and the impeller 4 is fixedly connected to the rotating shaft 2 so that the rotating shaft 2 drives the impeller 4 to rotate. The half shell 31 located away from the base 1 is integrally formed with a through-hole 312 along its own axial direction, and the two half shells 31 are integrally formed with an air outlet 313 at the peripheral wall position, and the gas flows into the half shell 31 from the air inlet 312 and is discharged from the air outlet 313.
[0041] Reference Figure 5 A waterproof ring 3111 is provided between the base 1 and the semi-shell 31, and the waterproof ring 3111 includes a rubber ring; the waterproof ring 3111 is sleeved on the rotating shaft 2, and the side wall of one side of the waterproof ring 3111 is tightly pressed against the outer wall of the semi-shell 31, and the side wall of the other side of the waterproof ring 3111 is tightly pressed against the end wall of the base 1; the inner peripheral wall of the waterproof ring 3111 is tightly pressed against the peripheral wall of the rotating shaft 2 to seal the corresponding end of the mounting hole 11, thereby reducing the possibility of water flowing into the mounting hole 11.
[0042] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A motor, comprising a base (1), wherein the base (1) is provided with a rotor and a stator, wherein the stator is connected to the base (1); characterized in that: The base (1) is provided with a mounting hole (11) extending through the base along its axial direction, a rotating shaft (2) is inserted into the mounting hole (11), and the rotor is connected to the rotating shaft (2); the rotating shaft (2) is sleeved with a supporting bearing (21) and a guiding bearing (22), and the outer peripheral walls of the outer rings of the supporting bearing (21) and the guiding bearing (22) are both in contact with the inner peripheral wall of the mounting hole (11); the inner peripheral wall of the mounting hole (11) is provided with an abutting ring (111) abutting with the outer ring of the guiding bearing (22), and the abutting ring (111) is located between the guiding bearing (22) and the supporting bearing (21); an elastic compression member (23) is provided in the mounting hole (11) at a position between the abutting ring (111) and the supporting bearing (21), and one end of the elastic compression member (23) is in contact with the abutting ring (111), and the other end is in contact with the outer ring of the supporting bearing (21).
2. A motor according to claim 1, characterized in that: The peripheral wall of the rotating shaft (2) is provided with two limiting rings (24), one of which is in contact with the end wall of the inner ring of the guide bearing (22) away from the support bearing (21), and the other limiting ring (24) is in contact with the end wall of the inner ring of the support bearing (21) away from the guide bearing (22).
3. A motor according to claim 2, characterized in that: The peripheral wall of the rotating shaft (2) at the position of the limiting ring (24) is provided with a mounting ring groove (25) along the circumference of the rotating shaft (2); the limiting ring (24) is provided with a clearance notch (241) penetrating along its thickness direction, and the inner side wall of the clearance notch (241) is connected to both the inner peripheral wall and the outer peripheral wall of the limiting ring (24); the limiting ring (24) is elastic.
4. A motor according to claim 3, characterized in that: The inner side wall of the clearance notch (241) is obliquely provided with a guide surface (242) for abutting against the bottom wall of the mounting ring groove (25).
5. The motor according to claim 1, characterized in that: Lubricant is provided between the outer peripheral wall of the outer ring of the support bearing (21) and the inner peripheral wall of the mounting hole (11).
6. A motor according to claim 5, characterized in that: The inner peripheral wall of the mounting hole (11) is provided with a receiving annular groove (112) for receiving lubricant along the circumference of the mounting hole (11).
7. The motor according to claim 1, characterized in that: The outer peripheral wall of the machine base (1) located at the position of the support bearing (21) is provided with a heat dissipation groove (14) along the length direction of the mounting hole (11), and a plurality of the heat dissipation grooves (14) are sequentially spaced along the circumference of the machine base (1).
8. A fan, characterized in that: It comprises an air guide cover (3), an impeller (4) arranged in the air guide cover (3), and a motor according to any one of claims 1 to 7; the air guide cover (3) is connected to the machine base (1), and the impeller (4) is connected to the rotating shaft (2); the air guide cover (3) is provided with an air inlet hole (312) and an air outlet hole (313).