Noise reduction motor and fan

Abstract

The utility model discloses a noise reduction motor and a fan, and relates to the technical field of motors. A noise reduction motor comprises a cylindrical shell, the shell is provided with a rotor and a stator, and the stator is connected with the shell; a rotating shaft is inserted into the shell and is connected with the stator; the rotating shaft is sleeved with a supporting bearing, a guide bearing and an elastic piece, an inner ring of the supporting bearing and an inner ring of the guide bearing are both connected with the peripheral wall of the rotating shaft, and the elastic piece is located between the supporting bearing and the guide bearing. One end of the elastic piece abuts against the end wall of the outer ring of the supporting bearing, the other end of the elastic piece abuts against the end wall of the outer ring of the guide bearing, and the elastic piece is in a compressed state; the space between the outer ring of the supporting bearing and the inner circumferential wall of the shell and the space between the outer ring of the guiding bearing and the inner circumferential wall of the shell are filled with glue liquid used for fixing the corresponding outer rings. According to the invention, the rotating fit clearance of the corresponding bearing can be reduced, so that the possibility of noise caused by collision between the balls and the inner ring or the outer ring in the rotating process of the rotor is reduced.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a noise reduction motor and fan. Background Art

[0002] The rotating shafts at both ends of the motor rotor are generally sleeved with bearings, and the outer rings of the bearings are interference fit with the inner holes of the motor housing, so that the rotor drives the rotating shaft to rotate relative to the motor housing.

[0003] When assembling the motor, first insert the rotor into the housing, then sleeve the bearings onto the corresponding shafts from both ends of the housing, and insert the bearings into the housing.

[0004] With regard to the above-mentioned related technologies, after the bearing is installed, there is an assembly gap between the inner wall of the outer ring of the bearing and the ball, and between the ball and the inner wall of the inner ring; when the motor is running, the inner ring of the bearing rotates relative to the outer ring through the ball, and the ball and the inner wall of the inner ring or outer ring of the bearing are prone to collide and generate noise, so there is room for improvement. Utility Model Content

[0005] The purpose of the present application is to provide a noise-reducing motor and fan to reduce the matching clearance of the bearing, thereby reducing the possibility of noise generated by the collision between the ball of the bearing and the inner ring or the outer ring, so as to reduce the noise during the operation of the motor.

[0006] In the first aspect, the present application provides a noise reduction motor adopting the following technical solution:

[0007] A noise reduction motor comprises a cylindrical shell, the shell is provided with a rotor and a stator, the stator is connected to the shell; a rotating shaft is inserted into the shell, the stator is connected to the rotating shaft; the rotating shaft sleeve is provided with a support bearing, a guide bearing and an elastic member, the inner ring of the support bearing and the inner ring of the guide bearing are both connected to the peripheral wall of the rotating shaft, and the elastic member is located between the support bearing and the guide bearing; one end of the elastic member abuts against the end wall of the outer ring of the support bearing, and the other end of the elastic member abuts against the end wall of the outer ring of the guide bearing, and the elastic member is in a compressed state; the outer ring of the support bearing and the outer ring of the guide bearing and the inner peripheral wall of the shell are filled with glue for fixing the corresponding outer rings.

[0008] By adopting the above technical solution, during the installation of the rotor, the elastic member is in a compressed state, so that the inner wall of the outer ring of the support bearing and the inner wall of the outer ring of the guide bearing can be kept in contact with the corresponding balls respectively, so that the balls can be kept in contact with the inner wall of the corresponding inner ring, so as to reduce the matching clearance of the corresponding bearings, which is beneficial to reducing the possibility of noise generated by collision between the balls and the inner ring or outer ring during the rotation of the rotor, thereby helping to reduce the noise generated when the motor is running.

[0009] Optionally, glue for fixing the corresponding inner rings is filled between the inner wall of the inner ring of the support bearing and the peripheral wall of the rotating shaft, and between the inner wall of the inner ring of the guide bearing and the peripheral wall of the rotating shaft.

[0010] By adopting the above technical solution, the inner ring of the support bearing and the inner ring of the guide bearing are fixed to the rotating shaft by glue, which is convenient for installing the support bearing and the guide bearing and is beneficial to improving the stability of the fixation of the support bearing and the guide bearing.

[0011] Optionally, a spring retaining ring is clamped at a position of the rotating shaft at one end of the support bearing away from the guide bearing and at a position of the guide bearing away from the support bearing, and the spring retaining ring is used to abut against the end wall of the corresponding support bearing or guide bearing.

[0012] By adopting the above technical solution, the spring retaining ring can limit the distance between the support bearing and the guide bearing to allow the glue between the inner ring and the peripheral wall of the rotating shaft to solidify, thereby reducing the possibility of the inner ring sliding before the glue solidifies, which is beneficial to improving the accuracy of the position of the support bearing and the guide bearing relative to the rotating shaft.

[0013] Optionally, the rotor includes a permanent magnet, and the stator includes a coil; a plurality of winding poles for winding the coil are sequentially arranged at intervals on the outer peripheral wall of the shell along the circumferential direction of the shell.

[0014] By adopting the above technical solution, the rotor is a permanent magnet, thereby reducing the brush structure, which is beneficial to further reduce the noise when the motor is running.

[0015] Optionally, the outer shell is provided with a protective shell covering all winding poles, and the protective shell is provided with a plurality of heat dissipation holes penetrating along the wall thickness direction thereof.

[0016] By adopting the above technical solution, the protective shell can protect the stator, and the heat generated by the stator being energized can be quickly dissipated through the heat dissipation holes.

[0017] Optionally, the inner peripheral wall at one end of the housing is provided with a positioning ring for abutting against the end wall of the support bearing or the guide bearing at one end facing away from the elastic member.

[0018] By adopting the above technical solution, the positioning ring can limit the position of the corresponding supporting bearing or guide bearing relative to the housing, so that the rotor can be quickly installed in place.

[0019] Optionally, the inner circumferential wall of the housing at the support bearing and the guide bearing positions is provided with filling annular grooves for filling glue along the circumference of the housing.

[0020] By adopting the above technical solution, before installing the rotating shaft, the glue can be applied to the filling ring groove, which is helpful to reduce the possibility of the glue flowing out to the outside of the shell, so as to improve the convenience of installing the rotating shaft.

[0021] In the second aspect, the present application provides a fan adopting the following technical solution:

[0022] A fan comprises an air guide cover, an impeller arranged in the air guide cover and the above-mentioned noise reduction motor; the air guide cover is connected to the shell, and the impeller is connected to the rotating shaft; the air guide cover is provided with an air inlet hole and an air outlet hole.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The elastic member is in a compressed state, so that the inner wall of the outer ring of the support bearing and the inner wall of the outer ring of the guide bearing can be kept in contact with the corresponding balls respectively, so that the balls can be kept in contact with the inner wall of the corresponding inner ring, so as to reduce the matching clearance of the corresponding bearings, which is beneficial to reduce the possibility of noise generated by the collision between the balls and the inner ring or the outer ring during the rotation of the rotor, thereby helping to reduce the noise generated when the motor is running;

[0025] 2. The spring retaining ring can limit the distance between the support bearing and the guide bearing to allow the glue between the inner ring and the peripheral wall of the rotating shaft to solidify, thereby reducing the possibility of the inner ring sliding before the glue solidifies, which is beneficial to improving the accuracy of the position of the support bearing and the guide bearing relative to the rotating shaft;

[0026] 3. The locating ring can limit the position of the corresponding support bearing or guide bearing relative to the housing so that the rotor can be quickly installed in place. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a noise reduction motor according to an embodiment of the present application.

[0028] Figure 2 It is a cross-sectional schematic diagram used to show the connection structure between the rotating shaft and the housing.

[0029] Figure 3 It is a schematic diagram of the overall structure of a fan according to an embodiment of the present application.

[0030] Figure 4 It is an exploded schematic diagram used to show the structure of the air duct.

[0031] In the figure, 1. outer shell; 11. connecting sleeve; 111. winding column; 12. filling ring groove; 13. positioning ring; 14. protective cover; 141. heat dissipation hole; 2. rotating shaft; 21. supporting bearing; 22. guide bearing; 23. elastic member; 24. mounting ring groove; 25. spring retaining ring; 3. air guide cover; 31. half shell; 311. clearance hole; 312. air inlet hole; 313. air outlet hole; 4. impeller; 5. waterproof ring. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0033] A noise reduction motor, referring to Figure 1 , including a shell 1, which is hollow inside and cylindrical with two ends penetrated. A connecting sleeve 11 is sleeved on the outer peripheral wall of one end of the shell 1, and the inner peripheral wall of the connecting sleeve 11 is welded and fixed to the outer peripheral wall of the shell 1; the outer peripheral wall of the connecting sleeve 11 is integrally formed with a plurality of winding posts 111, and a plurality of winding posts 111 are sequentially arranged at intervals along the circumference of the shell 1. A rotating shaft 2 is inserted through the inside of the shell 1, and the rotating shaft 2 is rotatably connected to the inner peripheral wall of the shell 1 around its own axis. The shell 1 is provided with a rotor (not shown in the figure) and a stator (not shown in the figure); the rotor includes a permanent magnet, and the rotor is embedded in the peripheral wall of the rotating seat located at the position of the connecting sleeve 11; the stator includes a coil, and the coil is wound around the winding post 111, so that the rotor drives the rotating shaft 2 to rotate.

[0034] Reference Figure 2 The rotating shaft 2 is sleeved with a supporting bearing 21, a guide bearing 22 and an elastic member 23. The elastic member 23 includes a spring and is located between the supporting bearing 21 and the guide bearing 22. The peripheral wall of the rotating shaft 2 located on the side of the supporting bearing 21 and the guide bearing 22 away from the elastic member 23 is provided with a mounting ring groove 24. A spring retaining ring 25 is clamped in the mounting ring groove 24. Each spring retaining ring 25 is used to abut against the end wall of the corresponding inner ring. One end of the elastic member 23 abuts against the end wall of the outer ring of the supporting spring, and the other end abuts against the end wall of the outer ring of the guide bearing 22. The elastic member 23 is in a compressed state, so that the inner wall of the outer ring of the supporting bearing 21 is kept in abutment with the inner wall of the corresponding inner ring through the ball, and the outer ring of the guide bearing 22 is kept in abutment with the inner wall of the corresponding inner ring through the ball, so as to reduce the assembly clearance of the motor at the corresponding position, so as to reduce the noise generated when the motor is running.

[0035] Reference Figure 2, the inner diameter of the housing 1 is larger than the outer diameter of the outer ring of the support bearing 21 and the guide bearing 22; the inner peripheral wall of the housing 1 at the position of the support bearing 21 and the guide bearing 22 is provided with a filling ring groove 12 along the circumference of the housing 1, and the filling ring groove 12 is filled with glue (not shown in the figure), which is anaerobic glue; the glue is connected to the outer peripheral wall of the outer ring at the corresponding position, so that the outer ring of the support bearing 21 and the outer ring of the guide bearing 22 are fixed relative to the housing 1. In this embodiment, the inner ring of the support bearing 21 and the peripheral wall of the rotating shaft 2, and the inner ring of the guide bearing 22 and the peripheral wall of the rotating shaft 2 are also filled with anaerobic glue to improve the stability of the inner ring of the support bearing 21 and the inner ring of the guide bearing 22 being fixed relative to the rotating shaft 2.

[0036] Reference Figure 2 The inner peripheral wall of the housing 1 at one end of the support bearing 21 is integrally formed with a positioning ring 13, and the positioning ring 13 abuts against the end wall of the outer ring of the support bearing 21 away from the guide bearing 22, so as to quickly locate the position of the rotating shaft 2. In another embodiment, the positioning ring 13 can also be arranged at a position at one end of the guide bearing 22, so that the end wall of the outer ring of the guide bearing 22 away from the support bearing 21 abuts against the positioning ring 13.

[0037] Reference Figure 1 and Figure 2 The housing 1 is provided with a protective cover 14, which covers all the winding posts 111, and the protective cover 14 is fixedly connected to the winding posts 111 by screws. The outer peripheral wall of the protective cover 14 located between two adjacent winding posts 111 is penetrated with heat dissipation holes 141 along the wall thickness direction of the protective cover 14, so as to quickly dissipate the heat generated when the stator is energized.

[0038] The implementation principle of the embodiment of the present application is:

[0039] When assembling the motor, first snap one of the spring retaining rings 25 into the corresponding mounting ring groove 24; then, apply glue to the inner circumferential wall of the inner ring of the support bearing 21 and the inner circumferential wall of the inner ring of the guide bearing 22, and then sequentially sleeve the support bearing 21, the elastic member 23, and the guide bearing 22 on the rotating shaft 2, and then snap another spring retaining ring 25 into the remaining other mounting ring groove 24 to put the elastic member 23 in a compressed state; then apply glue to the filling ring groove 12 and to the outer circumferential wall of the outer ring of the support bearing 21 and the outer circumferential wall of the outer ring of the guide bearing 22; finally, insert the rotating seat into the housing 1 so that the end wall of the outer ring of the support bearing 21 abuts against the positioning ring 13; finally, install the protective cover 14; and turn on the power for operation after the glue solidifies.

[0040] During the installation of the rotating shaft 2, the elastic member 23 is always in a compressed state, so that the inner wall of the outer ring of the support bearing 21 can always maintain abutment with the inner wall of the inner ring through the corresponding balls, and the inner wall of the outer ring of the guide bearing 22 can always maintain abutment with the inner wall of the inner ring through the corresponding balls, which is beneficial to reduce the assembly clearance at the support bearing 21 and the guide bearing 22, thereby reducing the possibility of the support bearing 21 or the guide bearing 22 generating noise when the rotating shaft 2 rotates, thereby achieving the effect of reducing the noise when the motor is running.

[0041] This embodiment also discloses a fan, referring to Figure 3 and Figure 4 , 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-passing hole 311 along its own axial direction, and the corresponding half shell 31 is fixedly connected to the end wall of the housing 1 at the end away from the protective cover 14, and the corresponding end of the rotating shaft 2 is inserted through the through-passing 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 at a position away from the housing 1 is integrally formed with a through-passing air inlet 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.

[0042] Reference Figure 4 A waterproof ring 5 is provided between the shell 1 and the semi-shell 31, and the waterproof ring 5 includes a rubber ring; the waterproof ring 5 is sleeved on the rotating shaft 2, and the side wall of one side of the waterproof ring 5 is tightly pressed against the outer wall of the semi-shell 31, and the side wall of the other side of the waterproof ring 5 is tightly pressed against the end wall of the shell 1; the inner circumferential wall of the waterproof ring 5 is tightly pressed against the circumferential wall of the rotating shaft 2 to seal the corresponding end of the shell 1, thereby reducing the possibility of water flowing into the interior of the shell 1.

[0043] 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 noise reduction motor, comprising a cylindrical housing (1), wherein the housing (1) is provided with a rotor and a stator, wherein the stator is connected to the housing (1); characterized in that: A rotating shaft (2) is inserted into the housing (1), and the stator is connected to the rotating shaft (2); a supporting bearing (21), a guiding bearing (22) and an elastic member (23) are sleeved on the rotating shaft (2); the inner ring of the supporting bearing (21) and the inner ring of the guiding bearing (22) are both connected to the peripheral wall of the rotating shaft (2), and the elastic member (23) is located between the supporting bearing (21) and the guiding bearing (22); one end of the elastic member (23) abuts against the end wall of the outer ring of the supporting bearing (21), and the other end of the elastic member (23) abuts against the end wall of the outer ring of the guiding bearing (22), and the elastic member (23) is in a compressed state; and the outer rings of the supporting bearing (21) and the guiding bearing (22) and the inner peripheral wall of the housing (1) are filled with glue for fixing the corresponding outer rings.

2. The noise reduction motor according to claim 1, characterized in that: The space between the inner wall of the inner ring of the support bearing (21) and the peripheral wall of the rotating shaft (2), and the space between the inner wall of the inner ring of the guide bearing (22) and the peripheral wall of the rotating shaft (2) are filled with glue for fixing the corresponding inner rings.

3. The noise reduction motor according to claim 2, characterized in that: The rotating shaft (2) is provided with a spring retaining ring (25) at a position of the end of the supporting bearing (21) away from the guiding bearing (22) and at a position of the end of the guiding bearing (22) away from the supporting bearing (21). The spring retaining ring (25) is used to abut against the end wall of the corresponding supporting bearing (21) or guiding bearing (22).

4. The noise reduction motor according to claim 1, characterized in that: The rotor comprises a permanent magnet, and the stator comprises a coil; a plurality of winding poles (111) for winding the coil are sequentially arranged at intervals on the outer peripheral wall of the housing (1) along the circumferential direction of the housing (1).

5. The noise reduction motor according to claim 4, characterized in that: The housing (1) is provided with a protective shell covering all winding poles (111), and the protective shell is provided with a plurality of heat dissipation holes (141) penetrating along the wall thickness direction thereof.

6. The noise reduction motor according to claim 1, characterized in that: The inner peripheral wall of one end of the housing (1) is provided with a positioning ring (13) for abutting against the end wall of the support bearing (21) or the guide bearing (22) at one end facing away from the elastic member (23).

7. The noise reduction motor according to claim 1, characterized in that: The inner peripheral wall of the housing (1) at the positions of the support bearing (21) and the guide bearing (22) is provided with a filling annular groove (12) for filling glue along the circumference of the housing (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 noise reduction motor according to any one of claims 1 to 7; the air guide cover (3) is connected to the housing (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).

Images