Asynchronous motor and high-rotating-speed rotating shaft supporting structure thereof
By adopting structures such as springs and adjusting parts in small motors, the axial movement of the bearing inner ring is limited, and the problem of shaft traversing is solved, and the stability and accuracy of the motor are improved.
Patent Information
- Application Number
- CN202421075593.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-16
AI Technical Summary
The rotation shaft of a small motor is prone to axial squirming, affecting the stability and smoothness of the motor operation, and the prior art is difficult to effectively solve this problem.
The high-speed rotary shaft support structure including a spring, a adjusting member and an elastic block is adopted to limit the axial movement of the bearing inner ring through the spring, and the installation position of the bearing is adjusted through the adjustment member and the elastic block to ensure the stable and fixed bearing.
It effectively reduces the axial movement of the rotating shaft, improves the running stability and smoothness of the motor, and enhances the overall running accuracy of the equipment.
Smart Images
Figure CN222356102U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of motors, in particular to an asynchronous motor and a high-speed rotating shaft supporting structure thereof. Background Art
[0002] Small electric motors are used in a variety of applications, for example as a power source for household appliances, hand tools, kitchen automation appliances, actuators in motor vehicles or similar devices. The requirements for this type of motor are becoming increasingly higher. In addition to high power, they must also have good running smoothness and quietness.
[0003] The motor shaft is usually supported by bearings. If the fit between the motor shaft and the bearing is too tight or too loose, it will cause axial movement of the bearing, which will affect the stability and smoothness of the motor operation and the overall operating accuracy of the equipment. Utility Model Content
[0004] In order to reduce the probability of axial movement of the rotating shaft, the present application provides an asynchronous motor and a high-speed rotating shaft support structure thereof.
[0005] The high-speed shaft support structure of an asynchronous motor provided in the present application adopts the following technical solution:
[0006] An asynchronous motor and a high-speed shaft support structure thereof, comprising an end cover, a bearing, a shaft and a limiting structure, wherein the end cover comprises a main cover body, a front cover and a rear cover, wherein the main cover body is detachably connected to the motor housing, and a mounting ring for supporting the bearing is formed on the main cover body, wherein the front cover and the rear cover are respectively mounted on the two ends of the mounting ring and allow the shaft to pass through, wherein the limiting structure comprises two retaining springs, wherein the shaft is provided with two annular retaining grooves, wherein the two retaining springs are respectively mounted on the two retaining grooves, wherein the bearing is located between the two retaining springs, and wherein the two retaining springs are respectively abutted against the side surfaces on both sides of the inner ring of the bearing.
[0007] By adopting the above technical solution, the axial movement of the inner ring of the bearing on the rotating shaft is limited by two retaining springs, thereby reducing the probability of axial movement of the rotating shaft, improving the stability and smoothness of the motor operation, and the overall operating accuracy of the equipment.
[0008] Preferably, the limiting structure also includes multiple adjusting members and multiple blocking blocks. The adjusting members are arranged on the mounting ring. A plurality of sliding grooves are opened on the inner wall of the mounting ring. The plurality of sliding grooves are evenly distributed along the circumferential direction. The plurality of sliding grooves correspond to a plurality of blocking blocks respectively. The blocking blocks slide in the corresponding sliding grooves in a direction perpendicular to the axis of the rotating shaft. The plurality of adjusting members correspond to the plurality of blocking blocks respectively. The adjusting members are used to adjust the positions of the corresponding blocking blocks in the sliding grooves. The blocking blocks are used to abut against the outer wall of the outer ring of the bearing.
[0009] By adopting the above technical solution, after the bearing is installed, the outer ring of the bearing of standard size should abut against the inner wall of the mounting ring. However, if a bearing has a deviation in the outer ring size, especially if there is a gap between the outer ring of the bearing and the inner wall of the mounting ring after the bearing is installed, the operator can drive the block to press against the outer wall of the outer ring of the bearing through the adjustment piece to fix the position of the outer ring of the bearing.
[0010] Preferably, the adjusting member includes a spring and a push rod, the two ends of the spring are respectively arranged on the bottom wall of the corresponding slide groove and the corresponding stop block, and when there is no external force, the stop block is completely located in the slide groove; the side surface of the mounting ring facing the front cover is provided with a plurality of thread grooves along the axial direction of the rotating shaft, and the plurality of thread grooves are respectively connected to the plurality of slide grooves, the push rod is threadedly connected in the corresponding thread groove, and the stop block is provided with an inclined surface at one end facing the push rod, and the end of the push rod close to the stop block is always in contact with the inclined surface, and the end of the push rod away from the stop block is provided with a cross groove.
[0011] By adopting the above technical solution, the push rod is rotated to control the position change of the push rod in the thread groove, one end of the push rod abuts against the inclined surface, and the movement of the abutment block is controlled by cooperating with the spring.
[0012] Preferably, the front cover is fixed to the mounting ring by bolts.
[0013] Preferably, one end of the push rod close to the stop block is chamfered, and the chamfer angle is parallel to the inclination angle of the inclined surface.
[0014] By adopting the above technical solution and providing chamfers, the contact area between the push rod and the stop block can be increased, thereby increasing the effect of the push rod and the stop block.
[0015] Preferably, a plurality of elastic blocks are fixed to a side surface of the front cover facing the mounting ring, and the plurality of elastic blocks correspond to a plurality of push rods respectively. When the front cover is mounted on the mounting ring, the elastic blocks are pressed against the corresponding push rods.
[0016] By adopting the above technical solution, after the front cover is installed, the front cover fits the mounting ring, and at the same time the elastic block enters the corresponding threaded groove, and the end of the elastic block abuts on the push rod, which can reduce the probability of the push rod rotating, improve the stability of the push rod, and keep the abutment block in abutment against the outer ring of the bearing.
[0017] Preferably, the retaining spring comprises a retaining spring body and two side wings, through holes are respectively provided at both ends of the retaining spring body, the two side wings are respectively fixed on both sides of the retaining spring body, and a gap is always left between the side wings and the bearing.
[0018] By adopting the above technical solution, the operator can directly apply force on the two side wings to remove the retaining ring from the retaining groove, and can remove the retaining ring by acting on the two through holes without the help of external tools.
[0019] The present application also provides an asynchronous motor, which adopts the following technical solution:
[0020] An asynchronous motor comprises the rotating shaft supporting structure.
[0021] The technical effects of this utility model are mainly reflected in the following aspects:
[0022] 1. The utility model limits the axial movement of the inner ring of the bearing on the rotating shaft through two retaining springs, thereby reducing the probability of axial movement of the rotating shaft, improving the stability and smoothness of the motor operation and the overall operation accuracy of the equipment;
[0023] 2. The utility model controls the position change of the push rod in the threaded groove by rotating the push rod. One end of the push rod abuts against the inclined surface and controls the movement of the abutment block by cooperating with the spring. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the overall structure of the motor according to the embodiment of the present application.
[0025] Figure 2 It is a schematic diagram of the shaft support structure of an embodiment of the present application.
[0026] Figure 3 is along Figure 1 Section view along line AA.
[0027] Figure 4 yes Figure 3 Enlarged view of point B in the middle.
[0028] Figure 5 It is a schematic diagram of the structure of the retaining spring of the embodiment of the present application.
[0029] Explanation of the reference numerals in the accompanying drawings: 1. end cover; 11. main cover body; 111. mounting ring; 112. threaded groove; 113. slide groove; 114. reinforcing rib; 12. front cover; 121. elastic block; 13. rear cover; 2. rotating shaft; 21. slot; 3. limiting structure; 31. retaining spring; 311. retaining spring body; 312. side wing; 313. through hole; 32. adjusting member; 321. spring; 322. push rod; 323. cross groove; 33. stop block; 331. inclined surface; 4. bearing; 41. inner ring; 42. outer ring; 5. motor housing. DETAILED DESCRIPTION
[0030] The following is combined with Figure 1-5The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.
[0031] An embodiment of the present application discloses a high-speed shaft support structure for an asynchronous motor.
[0032] Reference Figure 1-Figure 4 A high-speed shaft support structure of an asynchronous motor of the present embodiment includes an end cover 1, a bearing 4, a shaft 2 and a limiting structure 3. The end cover 1 includes a main cover body 11, a front cover 12 and a rear cover 13. The main cover body 11 is installed on the motor housing 5. A mounting ring 111 for carrying the bearing 4 is formed on the main cover body 11. The front cover 12 and the rear cover 13 are respectively installed at both ends of the mounting ring 111 and the shaft 2 passes through. The limiting structure 3 includes two retaining springs 31. Two annular retaining grooves 21 are provided on the shaft 2. The two retaining springs 31 are respectively installed on the two retaining grooves 21. The bearing 4 can be a ball bearing 4. The bearing 4 is located between the two retaining springs 31. The two retaining springs 31 are respectively abutted on the side surfaces of the inner ring 41 of the bearing 4.
[0033] Reference Figure 3 and Figure 4 The two retaining springs 31 limit the axial movement of the inner ring 41 of the bearing 4 on the rotating shaft 2, thereby reducing the probability of axial movement of the rotating shaft 2, improving the stability and smoothness of the motor operation, and the overall operating accuracy of the equipment.
[0034] Reference Figure 2 In order to improve the structural strength of the mounting ring 111 , a plurality of reinforcing ribs 114 are integrally formed on the inner side surface of the main cover body 11 along the circumferential direction, and the two ends of the reinforcing ribs 114 are respectively fixed on the circumferential inner wall of the main cover body 11 and the circumferential outer wall of the mounting ring 111 .
[0035] Reference Figure 3 and Figure 4 The limiting structure 3 also includes a plurality of adjusting members 32 and a plurality of resisting blocks 33. The adjusting members 32 are arranged on the mounting ring 111. A plurality of slide grooves 113 are provided on the inner wall of the mounting ring 111. The plurality of slide grooves 113 are evenly distributed along the circumferential direction. The plurality of slide grooves 113 correspond to a plurality of resisting blocks 33 respectively. The resisting blocks 33 slide in the corresponding slide grooves 113 along the direction perpendicular to the axis of the rotating shaft 2. The plurality of adjusting members 32 correspond to the plurality of resisting blocks 33 respectively. The adjusting members 32 are used to adjust the position of the corresponding resisting blocks 33 in the slide grooves 113. The resisting blocks 33 are used to abut against the outer wall of the outer ring 42 of the bearing 4.
[0036] Reference Figure 3 and Figure 4After the bearing 4 is installed, the outer ring 42 of the bearing 4 of standard size should abut against the inner wall of the mounting ring 111. However, if the outer ring 42 of the bearing 4 has a size deviation, especially if there is a gap between the outer ring 42 of the bearing 4 and the inner wall of the mounting ring 111 after the bearing 4 is installed, the operator can drive the block 33 to abut against the outer wall of the outer ring 42 of the bearing 4 through the adjusting member 32 to fix the position of the outer ring 42 of the bearing 4.
[0037] Reference Figure 3 and Figure 4 The adjusting member 32 includes a spring 321 and a push rod 322. The two ends of the spring 321 are respectively arranged on the bottom wall of the corresponding slide groove 113 and the corresponding stop block 33. When there is no external force, the stop block 33 is completely located in the slide groove 113. The side surface of the mounting ring 111 facing the front cover 12 is provided with a plurality of thread grooves 112 along the axis direction of the rotating shaft 2. The plurality of thread grooves 112 are respectively connected to the plurality of slide grooves 113. The inner wall of the thread groove 112 near the slide groove 113 has threads. The push rod 322 is threadedly connected in the corresponding thread groove 112. The stop block 33 is provided with an inclined surface 331 at one end facing the push rod 322. The end of the push rod 322 near the stop block 33 always abuts against the inclined surface 331. The end of the push rod 322 away from the stop block 33 is provided with a cross groove 323.
[0038] Reference Figure 3 and Figure 4 By rotating the push rod 322 , the position change of the push rod 322 in the thread groove 112 is controlled. One end of the push rod 322 abuts against the inclined surface 331 , and the movement of the stop block 33 is controlled by cooperating with the spring 321 .
[0039] Reference Figure 1 and Figure 2 The front cover 12 and the rear cover 13 are both fixed to the mounting ring 111 by bolts.
[0040] Reference Figure 3 and Figure 4 The end of the push rod 322 close to the stop block 33 is chamfered, and the chamfer angle is parallel to the inclination angle of the inclined surface 331. By providing the chamfer, the contact area between the push rod 322 and the stop block 33 can be increased, and the effect of the push rod 322 and the stop block 33 can be increased.
[0041] Reference Figure 3 and Figure 4A plurality of elastic blocks 121 are fixed to the side surface of the front cover 12 facing the mounting ring 111. The plurality of elastic blocks 121 correspond to the plurality of push rods 322 respectively. When the front cover 12 is mounted on the mounting ring 111, the elastic blocks 121 abut against the corresponding push rods 322. After the front cover 12 is mounted, the front cover 12 fits the mounting ring 111, and the elastic blocks 121 enter the corresponding threaded grooves 112. The ends of the elastic blocks 121 abut against the push rods 322, which can reduce the probability of the push rods 322 rotating, improve the stability of the push rods 322, and keep the abutment blocks 33 abutting against the outer ring 42 of the bearing 4.
[0042] Reference Figure 3 and Figure 5 The retaining spring 31 includes a retaining spring body 311 and two side wings 312. Through holes 313 are respectively opened at both ends of the retaining spring body 311. The two side wings 312 are respectively fixed on both sides of the retaining spring body 311. A gap is always left between the side wings 312 and the bearing 4.
[0043] Reference Figure 3 and Figure 5 The operator can directly apply force on the two side wings 312 to remove the retaining spring 31 from the retaining groove 21, and can remove the retaining spring 31 by acting on the two through holes 313 without the help of external tools.
[0044] The embodiment of the present application also discloses an asynchronous motor.
[0045] Reference Figure 1 and Figure 3 An asynchronous motor includes a motor housing 5 and the above-mentioned shaft support structure. The main cover body 11 in the shaft support structure is connected to the motor housing 5 by bolts and nuts. A stator and rotor are also installed in the motor housing 5. A fan is installed at the end of the shaft 2 away from the end cover 1 for cooling the motor.
[0046] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.
Claims
1. A high-speed shaft support structure for an asynchronous motor, characterized in that: The motor (1) comprises an end cover (1), a bearing (4), a rotating shaft (2) and a limiting structure (3). The end cover (1) comprises a main cover body (11), a front cover (12) and a rear cover (13). The main cover body (11) is detachably connected to a motor housing (5). A mounting ring (111) for carrying the bearing (4) is formed on the main cover body (11). The front cover (12) and the rear cover (13) are respectively mounted on the two ends of the mounting ring (111) and are passed through by the rotating shaft (2). The limiting structure (3) comprises two retaining springs (31). Two annular retaining grooves (21) are provided on the rotating shaft (2). The two retaining springs (31) are respectively mounted on the two retaining grooves (21). The bearing (4) is located between the two retaining springs (31). The two retaining springs (31) are respectively abutted against the side surfaces of the inner ring (41) of the bearing (4).
2. The high-speed shaft support structure of an asynchronous motor according to claim 1, characterized in that: The limiting structure (3) also includes a plurality of adjusting members (32) and a plurality of resisting blocks (33). The adjusting members (32) are arranged on the mounting ring (111). A plurality of slide grooves (113) are provided on the inner wall of the mounting ring (111). The plurality of slide grooves (113) are evenly distributed along the circumferential direction. The plurality of slide grooves (113) respectively correspond to a plurality of resisting blocks (33). The resisting blocks (33) slide in the corresponding slide grooves (113) in a direction perpendicular to the axis of the rotating shaft (2). The plurality of adjusting members (32) respectively correspond to the plurality of resisting blocks (33). The adjusting members (32) are used to adjust the position of the corresponding resisting blocks (33) in the slide grooves (113). The resisting blocks (33) are used to abut against the outer wall of the outer ring (42) of the bearing (4).
3. The high-speed shaft support structure of an asynchronous motor according to claim 2, characterized in that: The adjusting member (32) comprises a spring (321) and a push rod (322), the two ends of the spring (321) are respectively arranged on the bottom wall of the corresponding slide groove (113) and the corresponding stop block (33), when there is no external force, the stop block (33) is completely located in the slide groove (113); a side surface of the mounting ring (111) facing the front cover (12) is provided with a plurality of thread grooves (112) along the axial direction of the rotating shaft (2), the plurality of thread grooves (112) are respectively connected to the plurality of slide grooves (113), the push rod (322) is threadedly connected in the corresponding thread groove (112), an inclined surface (331) is provided at one end of the stop block (33) facing the push rod (322), the end of the push rod (322) close to the stop block (33) is always in contact with the inclined surface (331), and a cross groove (323) is provided at one end of the push rod (322) away from the stop block (33).
4. The high-speed shaft support structure of an asynchronous motor according to claim 1, characterized in that: The front cover (12) is fixed on the mounting ring (111) by means of bolts.
5. The high-speed shaft support structure of an asynchronous motor according to claim 3, characterized in that: One end of the push rod (322) close to the stop block (33) is provided with a chamfer, and the chamfer angle is parallel to the inclination angle of the inclined surface (331).
6. The high-speed shaft support structure of an asynchronous motor according to claim 3, characterized in that: A plurality of elastic blocks (121) are fixed to a side surface of the front cover (12) facing the mounting ring (111), and the plurality of elastic blocks (121) respectively correspond to a plurality of push rods (322). When the front cover (12) is mounted on the mounting ring (111), the elastic blocks (121) are pressed against the corresponding push rods (322).
7. The high-speed shaft support structure of an asynchronous motor according to claim 1, characterized in that: The clamping spring (31) comprises a clamping spring body (311) and two side wings (312); through holes (313) are respectively provided at both ends of the clamping spring body (311); the two side wings (312) are respectively fixed on both sides of the clamping spring body (311); and a gap is always left between the side wings (312) and the bearing (4).
8. An asynchronous motor, characterized in that: It comprises the rotating shaft supporting structure as described in any one of claims 1 to 6.