Motor
By setting up elastic gaskets with interlaced structures in the bearing clearance space of the motor, the axial squirming problem caused by changes in the bearing clearance of the motor is solved, and the effect of reducing noise and extending service life is achieved.
Patent Information
- Application Number
- CN202421453507.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-24
AI Technical Summary
In existing motor designs, the gap between the input shaft and the rotor shaft and the bearing seat changes lead to axial squirting, increasing noise and shortening service life.
The first and second elastic gaskets are respectively arranged in the first and second gap spaces. Through the interlaced structure and specific materials of these elastic gaskets, the impact energy between the bearing and the bearing seat is absorbed or reduced, and axial squirting is prevented.
It effectively reduces the axial movement of the motor input shaft and rotor shaft, reduces noise pollution, and extends the service life of the shaft.
Smart Images
Figure CN222868660U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor design, in particular to a motor. Background Art
[0002] In the field of motor design, the clearance control between the bearings and the bearing seats of the motor input shaft and the motor rotor shaft has always been an important technical problem.
[0003] First, due to manufacturing and assembly errors, the gap between the bearing and the bearing seat will vary within a small range. The motor input shaft and the motor gear shaft are helical gear meshing, which will produce an axial force component. The axial force component causes the motor input shaft and the motor gear shaft to have an axial movement tendency. The motor gear shaft and the motor rotor shaft are splined, and the motor rotor shaft will also have an axial movement tendency. When there is a small gap between the bearing and the bearing seat, the motor input shaft and the motor rotor will produce axial movement under the action of the axial force. This axial movement not only affects the running stability of the shaft, but may also cause bearing damage and shorten the service life of the shaft. When the shaft is running at high speed, the collision between the bearing and the bearing seat will produce knocking sounds, increase the noise pollution of the motor, and cause customer complaints.
[0004] Therefore, how to effectively reduce the axial movement and knocking sound of the motor input shaft and the motor rotor shaft, improve the operating stability and service life of the motor, and reduce customer complaints has become an urgent problem to be solved in the field of motor design. Utility Model Content
[0005] The utility model aims to provide a motor to solve the technical problems in the prior art, and can effectively reduce the axial movement of the motor input shaft and the motor rotor shaft and the knocking sound generated.
[0006] The utility model provides a motor, comprising:
[0007] The first bearing seat;
[0008] Second bearing seat;
[0009] The motor input shaft is sleeved with a first bearing, the first bearing is arranged in the first bearing seat, in the axial direction of the motor input shaft, the first bearing has a first outer surface on the side facing the first bearing seat, the first bearing seat has a first inner surface on the side facing the first bearing, and a first gap space is formed between the first outer surface and the first inner surface;
[0010] a motor rotor shaft, drivingly connected to the motor input shaft, a second bearing being sleeved on the motor rotor shaft, wherein in the axial direction of the motor rotor shaft, a side of the second bearing facing the second bearing seat has a second outer surface, a side of the second bearing seat facing the second bearing has a second inner surface, and a second gap space is formed between the second outer surface and the second inner surface;
[0011] A first elastic gasket is arranged in the first gap space, the first elastic gasket comprises a plurality of first outer protrusions and a plurality of first inner protrusions, the plurality of first outer protrusions and the plurality of first inner protrusions are arranged alternately in sequence, the first outer protrusions protrude and extend toward the first outer surface, and the first inner protrusions protrude and extend toward the first inner surface;
[0012] A second elastic gasket is arranged in the second gap space, and the second elastic gasket includes a plurality of second outer protrusions and a plurality of second inner protrusions. The plurality of second outer protrusions and the plurality of second inner protrusions are arranged alternately in sequence. The second outer protrusions protrude and extend toward the second outer surface, and the second inner protrusions protrude and extend toward the second inner surface.
[0013] In the motor as described above, preferably, the first elastic gasket includes a first segment and a second segment, the first segment has the same structure as the second segment, and the first segment is fitted and connected to the second segment.
[0014] In the motor as described above, preferably, the thickness of the first slice and the second slice are both 0.61±0.06 mm.
[0015] In the motor as described above, preferably, the number of each of the first outer protrusions and the first inner protrusions is four, and the four first outer protrusions and the four first inner protrusions are arranged alternately in a ring shape.
[0016] In the motor as described above, preferably, in the axial direction of the motor input shaft, a distance between the end of the first outer protrusion and the end of the first inner protrusion is 4.48 mm.
[0017] In the motor as described above, preferably, the first elastic gasket is a ring structure, the outer ring diameter of the first elastic gasket is 55 mm, and the inner ring diameter of the first elastic gasket is 45.31 mm.
[0018] In the motor as described above, preferably, the number of the second outer protrusions and the number of the second inner protrusions are four, and the four second outer protrusions and the four second inner protrusions are arranged alternately in a ring shape.
[0019] In the motor as described above, preferably, in the axial direction of the motor rotor shaft, a distance between the end of the second outer protrusion and the end of the second inner protrusion is 3.90 mm.
[0020] In the motor as described above, preferably, the second elastic gasket is a ring structure, the outer ring diameter of the second elastic gasket is 61 mm, and the inner ring diameter of the second elastic gasket is 51.5 mm.
[0021] In the motor as described above, preferably, the thickness of the second elastic gasket is 0.76±0.04 mm.
[0022] Compared with the prior art, the utility model arranges a first elastic gasket in the first gap space to absorb or reduce the energy generated by the impact between the first bearing and the first bearing seat, and arranges a second elastic gasket in the second gap space to absorb or reduce the energy generated by the impact between the second bearing and the second bearing seat, thereby effectively preventing the motor input shaft and the motor rotor shaft from axial movement during operation, which is beneficial to extending the service life of the shaft and reducing the noise pollution of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of a motor provided by an embodiment of the utility model;
[0024] Figure 2 yes Figure 1 An enlarged schematic diagram of point A;
[0025] Figure 3 yes Figure 1 An enlarged schematic diagram of point B;
[0026] Figure 4 It is a structural schematic diagram of a first elastic gasket provided in an embodiment of the utility model;
[0027] Figure 5 It is a partial schematic diagram of a first elastic gasket provided in an embodiment of the utility model;
[0028] Figure 6 It is a structural schematic diagram of a second elastic gasket provided in an embodiment of the utility model;
[0029] Figure 7 It is a partial schematic diagram of the second elastic gasket provided in the embodiment of the utility model;
[0030] Description of reference numerals:
[0031] 10-motor input shaft;
[0032] 20-motor rotor shaft;
[0033] 30-first bearing seat, 31-first bearing, 32-first outer surface, 33-first inner surface, 34-first gap space;
[0034] 40 - second bearing seat, 41 - second bearing, 42 - second outer surface, 43 - second inner surface, 44 - second gap space;
[0035] 50-first elastic gasket, 51-first outer protrusion, 52-first inner protrusion, 53-first split sheet, 54-second split sheet;
[0036] 60 - second elastic gasket, 61 - second outer protrusion, 62 - second inner protrusion. DETAILED DESCRIPTION
[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.
[0038] Reference Figures 1 to 3 As shown, the present application provides a motor, comprising a first bearing seat 30, a second bearing seat 40, a motor input shaft 10, a motor rotor shaft 20, a first elastic gasket 50 and a second elastic gasket 60, wherein:
[0039] The motor input shaft 10 is sleeved with a first bearing 31, which provides support for the motor input shaft 10. The first bearing 31 is arranged in a first bearing seat 30. In the axial direction of the motor input shaft 10, the side of the first bearing 31 facing the first bearing seat 30 has a first outer surface 32, and the side of the first bearing seat 30 facing the first bearing 31 has a first inner surface 33. The first outer surface 32 and the first inner surface 33 are arranged opposite to each other, and a first gap space 34 is provided between the first outer surface 32 and the first inner surface 33. Due to the existence of the first gap space 34, during the rotation of the motor input shaft 10, under the action of the axial force, axial movement may occur in the first gap space 34, thereby causing a collision between the first bearing 31 and the first bearing seat 30, thereby increasing the noise of the motor.
[0040] The motor rotor shaft 20 is transmission connected to the motor input shaft 10, and the motor input shaft 10 can drive the motor rotor shaft 20 to rotate synchronously. A second bearing 41 is sleeved on the motor rotor shaft 20, and the second bearing 41 provides support for the motor rotor shaft 20. In the axial direction of the motor rotor shaft 20, the side of the second bearing 41 facing the second bearing seat 40 has a second outer surface 42, and the side of the second bearing seat 40 facing the second bearing 41 has a second inner surface 43. The second outer surface 42 and the second inner surface 43 are arranged opposite to each other, and a second gap space 44 is provided between the second outer surface 42 and the second inner surface 43. Due to the existence of the second gap space 44, during the rotation of the motor rotor shaft 20, under the action of the axial force, axial movement may occur in the second gap space 44. In addition to the influence of the first gap space 34, if the motor input shaft 10 undergoes axial movement, the possibility of axial movement of the motor rotor shaft 20 is further increased. When the motor rotor shaft 20 runs at high speed, it will cause the second bearing 41 to collide with the second bearing seat 40, thereby destroying the stability of the motor rotor shaft 20 and increasing the possibility of bearing damage, which seriously affects the service life of the motor rotor shaft 20.
[0041] In order to avoid or reduce the possibility of collision between the first bearing 31 and the first bearing seat 30, refer to Figure 2 , Figure 4 as well as Figure 5 As shown, the first elastic gasket 50 is arranged in the first gap space 34, and the first elastic gasket 50 includes a plurality of first outer protrusions 51 and a plurality of first inner protrusions 52. The plurality of first outer protrusions 51 and the plurality of first inner protrusions 52 are arranged alternately in sequence, and the first outer protrusions 51 protrude and extend toward the first outer surface 32, and the first inner protrusions 52 protrude and extend toward the first inner surface 33. In the embodiment provided by the present application, the alternately arranged first outer protrusions 51 and the first inner protrusions 52 are respectively against the first outer surface 32 and the first inner surface 33. When the motor input shaft 10 is subjected to the axial force, the first outer protrusions 51 and the first inner protrusions 52 can be elastically deformed in the first gap space 34, absorbing or reducing the energy generated when the first bearing 31 and the first bearing seat 30 collide, reducing the impact sound of the first bearing 31 and the first bearing seat 30, and effectively avoiding the axial movement of the motor input shaft 10.
[0042] In order to avoid or reduce the possibility of collision between the second bearing 41 and the second bearing seat 40, refer to Figure 3 , Figure 6 as well as Figure 7As shown, the second elastic gasket 60 is arranged in the second gap space 44, and the second elastic gasket 60 includes a plurality of second outer protrusions 61 and a plurality of second inner protrusions 62. The plurality of second outer protrusions 61 and the plurality of second inner protrusions 62 are arranged alternately in sequence, and the second outer protrusions 61 protrude and extend toward the second outer surface 42, and the second inner protrusions 62 protrude and extend toward the second inner surface 43. In the embodiment provided by the present application, the alternately arranged second outer protrusions 61 and the second inner protrusions 62 are respectively against the second outer surface 42 and the second inner surface 43. When the motor rotor shaft 20 is subjected to the axial force, the second outer protrusions 61 and the second inner protrusions 62 can be elastically deformed in the second gap space 44, absorbing or reducing the energy generated when the second bearing 41 and the second bearing seat 40 collide, reducing the impact sound of the second bearing 41 and the second bearing seat 40, and effectively avoiding the axial movement of the motor rotor shaft 20.
[0043] The first elastic gasket 50 and the second elastic gasket 60 in the embodiment provided in the present application are both made of a specific elastic material. The specific elastic material used to make the first elastic gasket 50 is SAE 1070_1090-SAE J403_2014. SAE1070_1090-SAE J403_2014 is carbon spring steel. Carbon spring steel has strong elasticity and stress resistance. The first elastic gasket 50 made of carbon spring steel can absorb or greatly reduce the energy generated by the collision between the first bearing 31 and the first bearing seat 30 in the first gap space 34, thereby reducing or avoiding possible axial movement of the motor input shaft 10. The specific elastic material used to make the second elastic gasket 60 is 17-7PH. 17-7PH is a special stainless steel material, also known as controlled phase change stainless steel, which has the characteristics of high strength, good corrosion resistance, good deformability and elastic memory. The second elastic gasket 60 made of 17-7PH can effectively prevent the collision between the second bearing 41 and the second bearing seat 40 in the second gap space 44, and avoid axial movement of the motor rotor shaft 20.
[0044] In a feasible implementation mode, referring to Figure 5 As shown, the first elastic gasket 50 includes a first segment 53 and a second segment 54. The first segment 53 and the second segment 54 have the same structure, and the first segment 53 and the second segment 54 are connected in a close fit. The double-layer structure can improve the strength of the first elastic gasket 50, making it difficult for the first elastic gasket 50 to deform, thereby enhancing the ability of the first elastic gasket 50 to prevent the motor input shaft 10 from axial movement.
[0045] Furthermore, there are four first outer protrusions 51 and four first inner protrusions 52, which are arranged alternately in a ring to form an annular first elastic gasket 50, so that the first outer protrusions 51 and the first inner protrusions 52 can respectively abut against the first outer surface 32 and the first inner surface 33 to adapt to the shape of the outer wall of the first bearing 31 and the first bearing seat 30, and can have a maximum contact area to improve the anti-slip effect of the first elastic gasket 50 on the motor input shaft 10.
[0046] Preferably, reference Figure 5 As shown, in the axial direction of the motor input shaft 10, the spacing h1 between the end of the first outer protrusion 51 and the end of the first inner protrusion 52 is 4.48 mm, the outer ring diameter d1 of the first elastic gasket 50 is 55 mm, the inner ring diameter d2 of the first elastic gasket 50 is 45.31 mm, and the thickness h2 of the first segment 53 and the second segment 54 is 0.61±0.06 mm. The first elastic gasket 50 is an annular corrugated gasket with a certain thickness, so that the first elastic gasket 50 has a space for elastic deformation in the first gap space 34 to achieve buffering of the impact of the first bearing 31 and the first bearing seat 30.
[0047] In another feasible embodiment, there are four second outer protrusions 61 and four second inner protrusions 62, and the four second outer protrusions 61 and the four second inner protrusions 62 are arranged alternately in a ring to form an annular second elastic gasket 60, so that the second outer protrusions 61 and the second inner protrusions 62 can respectively abut against the second outer surface 42 and the second inner surface 43 to adapt to the shape of the outer wall of the second bearing 41 and the second bearing seat 40, and can have a maximum contact area to improve the anti-movement effect of the second elastic gasket 60 on the motor rotor shaft 20.
[0048] Preferably, reference Figure 7 As shown, in the axial direction of the motor rotor shaft 20, the spacing h3 between the end of the second outer protrusion 61 and the end of the second inner protrusion is 3.90mm, the second elastic gasket 60 is a ring structure, the outer ring diameter d3 of the second elastic gasket 60 is 61mm, the inner ring diameter d4 of the second elastic gasket 60 is 51.5mm, and the thickness h4 of the second elastic gasket 60 is 0.76±0.04mm. The second elastic gasket 60 is an annular corrugated gasket with a certain thickness. In order to adapt to the size of the second gap space 44, the size of the second elastic gasket 60 is slightly different from that of the first elastic gasket 50, but the annular structure is still to allow the second elastic gasket 60 to have a space for elastic deformation in the second gap space 44, so as to buffer the impact of the second bearing 41 and the second bearing seat 40.
[0049] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.
Claims
1. A motor, characterized in that: include: The first bearing seat; Second bearing seat; The motor input shaft is sleeved with a first bearing, the first bearing is arranged in the first bearing seat, in the axial direction of the motor input shaft, the first bearing has a first outer surface on the side facing the first bearing seat, the first bearing seat has a first inner surface on the side facing the first bearing, and a first gap space is formed between the first outer surface and the first inner surface; a motor rotor shaft, drivingly connected to the motor input shaft, a second bearing being sleeved on the motor rotor shaft, wherein in the axial direction of the motor rotor shaft, a side of the second bearing facing the second bearing seat has a second outer surface, a side of the second bearing seat facing the second bearing has a second inner surface, and a second gap space is formed between the second outer surface and the second inner surface; A first elastic gasket is arranged in the first gap space, the first elastic gasket comprises a plurality of first outer protrusions and a plurality of first inner protrusions, the plurality of first outer protrusions and the plurality of first inner protrusions are arranged alternately in sequence, the first outer protrusions protrude and extend toward the first outer surface, and the first inner protrusions protrude and extend toward the first inner surface; A second elastic gasket is arranged in the second gap space, and the second elastic gasket includes a plurality of second outer protrusions and a plurality of second inner protrusions. The plurality of second outer protrusions and the plurality of second inner protrusions are arranged alternately in sequence. The second outer protrusions protrude and extend toward the second outer surface, and the second inner protrusions protrude and extend toward the second inner surface.
2. The motor according to claim 1, characterized in that: The first elastic gasket includes a first segment and a second segment. The first segment has the same structure as the second segment, and the first segment is fitted and connected to the second segment.
3. The motor according to claim 2, characterized in that: The thickness of the first slice and the second slice are both 0.61±0.06 mm.
4. The motor according to claim 1, characterized in that: There are four of each of the first outer protrusions and the first inner protrusions, and the four first outer protrusions and the four first inner protrusions are arranged alternately in a ring shape.
5. The motor according to claim 1, characterized in that: In the axial direction of the motor input shaft, the distance between the end of the first outer protrusion and the end of the first inner protrusion is 4.48 mm.
6. The motor according to claim 1, characterized in that: The first elastic gasket is a ring structure, the outer ring diameter of the first elastic gasket is 55 mm, and the inner ring diameter of the first elastic gasket is 45.31 mm.
7. The motor according to claim 1, characterized in that: There are four of each of the second outer protrusions and the second inner protrusions, and the four second outer protrusions and the four second inner protrusions are arranged alternately in a ring shape.
8. The motor according to claim 1, characterized in that: In the axial direction of the motor rotor shaft, the distance between the end of the second outer protrusion and the end of the second inner protrusion is 3.90 mm.
9. The motor according to claim 1, characterized in that: The second elastic gasket is a ring structure, the outer ring diameter of the second elastic gasket is 61 mm, and the inner ring diameter of the second elastic gasket is 51.5 mm.
10. The motor according to claim 1, characterized in that: The thickness of the second elastic gasket is 0.76±0.04 mm.