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CN-224204871-U - Motor end cover structure and motor

CN224204871UCN 224204871 UCN224204871 UCN 224204871UCN-224204871-U

Abstract

The utility model provides a motor end cover structure and a motor, wherein the motor end cover structure comprises a cover body, a bearing seat and a reinforcing rib assembly, an annular bulge is arranged on the outer periphery of the cover body, the bearing seat is arranged on the cover body, an annular installation space is formed between the inner wall surface of the annular bulge and the outer wall surface of the bearing seat, the reinforcing rib assembly comprises a plurality of first reinforcing ribs and second reinforcing ribs, the first reinforcing ribs are arranged at intervals along the circumferential direction of the bearing seat, one ends of the first reinforcing ribs are connected with the bearing seat, the other ends of the first reinforcing ribs extend along the radial direction of the cover body and are connected with the annular bulge, a second reinforcing rib is arranged between every two adjacent first reinforcing ribs, and the distance between the first ends of the second reinforcing ribs and the axis of the bearing seat is smaller than the distance between the second ends of the second reinforcing ribs and the axis of the bearing seat. The structure of the first reinforcing rib and the second reinforcing rib which are matched can solve the problem that the motor performance is affected due to the fact that tangential vibration cannot be overcome in the motor end cover in the prior art.

Inventors

  • GUO SHUSHENG

Assignees

  • 珠海英搏尔电气股份有限公司

Dates

Publication Date
20260505
Application Date
20250506

Claims (10)

  1. 1. An end cover structure for an electric motor, comprising: a cover body (10), wherein an outer periphery of the cover body (10) is provided with an annular protrusion (20) extending along the circumferential direction of the cover body (10); A bearing seat (30) which is arranged on the cover body (10) and extends in the same direction as the annular protrusion (20), wherein an annular installation space (110) is formed between the inner wall surface of the annular protrusion (20) and the outer wall surface of the bearing seat (30); The reinforcing rib assembly (40) is arranged in the installation space (110), the reinforcing rib assembly (40) comprises a first reinforcing rib (410) and a second reinforcing rib (420), the first reinforcing ribs (410) are arranged in a plurality of mode and are arranged along the circumferential direction of the bearing seat (30) at intervals, one end of each first reinforcing rib (410) is connected with the bearing seat (30), the other end of each first reinforcing rib (410) extends along the radial direction of the cover body (10) and is connected with the annular protrusion (20), the second reinforcing ribs (420) are arranged between two adjacent first reinforcing ribs (410) along the circumferential direction of the bearing seat (30), and the distance between the first end of each second reinforcing rib (420) and the axis of the bearing seat (30) is smaller than the distance between the second end of each second reinforcing rib (420) and the axis of the bearing seat (30).
  2. 2. The motor end cap structure according to claim 1, wherein the second end of the second reinforcing bead (420) is located upstream of the first end in a rotational direction of a motor rotor.
  3. 3. The motor end cover structure according to claim 1, wherein the first end of the second reinforcing rib (420) is fixedly connected to the outer wall surface of the bearing housing (30) and one end of the first reinforcing rib (410).
  4. 4. A motor end cap structure according to claim 3, characterized in that the second reinforcing rib (420) is connected to the first reinforcing rib (410) to form an angle a, which satisfies 60 ° -a ∈85 °.
  5. 5. The motor end cap structure according to claim 1, wherein the stiffener assembly (40) further comprises: And the third reinforcing ribs (430) extend along the circumferential direction of the bearing seat (30), the third reinforcing ribs (430) are arranged between every two adjacent first reinforcing ribs (410), and the third reinforcing ribs (430) are arranged at intervals with the bearing seat (30) along the radial direction of the bearing seat (30).
  6. 6. The motor end cap structure of claim 5, wherein, The second end of the second reinforcing rib (420) is fixedly connected with the end part of the third reinforcing rib (430), and/or The third reinforcing rib (430) is coaxially arranged with the bearing seat (30) and the cover body (10).
  7. 7. The motor end cap structure of claim 1, wherein, The end face of the protruding end of the annular protrusion (20) is provided with a plurality of arc-shaped water passing grooves (210), the water passing grooves (210) are coaxial with the cover body (10), and a plurality of water passing grooves (210) are arranged at intervals along the circumferential direction of the cover body (10).
  8. 8. The motor end cap structure of claim 1, further comprising: A bearing (50), the bearing (50) being arranged inside the bearing seat (30), and/or The connecting lugs (60) are arranged on the outer peripheral surface of the cover body (10), and the connecting lugs (60) are arranged in a plurality and are arranged at intervals along the circumferential direction of the cover body (10).
  9. 9. The motor end cap structure according to any one of claims 1 to 8, wherein, The first reinforcing ribs (410) are sequentially arranged at equal intervals along the circumferential direction of the bearing seat (30), a routing area is formed between the first reinforcing ribs (410) and the first reinforcing ribs (410) at the first ends of the first reinforcing ribs (410), and the distance between the first reinforcing ribs (410) and the first reinforcing ribs (410) at the first ends of the bearing seat (30) is larger than the distance between two adjacent first reinforcing ribs (410).
  10. 10. An electric machine comprising the electric machine end cap structure of any one of claims 1 to 9.

Description

Motor end cover structure and motor Technical Field The utility model relates to the technical field of motors, in particular to a motor end cover structure and a motor. Background In the motor design of the electric drive system of the new energy automobile, the end cover is used as an important component of the motor and bears the key functions of fixing the motor shaft and supporting the bearing. Conventional motor end cap bearing housing designs typically employ radially uniformly distributed stiffener structures that are intended to increase the radial stiffness of the bearing housing to account for radial vibrations generated during motor operation. Under the operating conditions of the motor, particularly at high rotational speeds, electromagnetic forces and mechanical movements can cause the motor to produce complex vibration modes, including radial and tangential vibrations. Radial vibration is transmitted to the end cover through the bearing seat, and deformation and noise of the end cover are further caused, so that the radial vibration is one of the problems that the current design can better deal with. However, the conventional motor end cover bearing seat structure has an unsatisfactory effect of inhibiting tangential vibration. Although the radial reinforcing ribs can disperse and reduce the influence of radial vibration to a certain extent, tangential vibration which is also remarkable in motor operation easily causes larger deformation of the end cover due to lack of specific structural support, and further higher-frequency noise is generated, NVH (noise, vibration and harshness) performance of a vehicle is seriously influenced, and driving experience is reduced. In particular, tangential vibration is mainly represented by 8-order, 24-order, etc. nonlinear vibration modes of the motor, and vibration energy in these modes is difficult to be effectively dispersed or absorbed by the conventional radial reinforcing ribs, so that the prior art has a significantly short plate in suppressing tangential vibration. From the above, the motor end cover in the prior art has the problem that the motor performance is affected due to the fact that tangential vibration cannot be overcome. Disclosure of utility model The utility model mainly aims to provide a motor end cover structure and a motor, which are used for solving the problem that the motor end cover in the prior art cannot overcome the influence on the motor performance caused by tangential vibration. In order to achieve the above object, according to one aspect of the present utility model, there is provided a motor end cover structure including a cover body having an annular protrusion extending in a circumferential direction of the cover body at an outer periphery thereof, a bearing housing provided to the cover body and extending in the same direction as the annular protrusion, an annular installation space formed between an inner wall surface of the annular protrusion and an outer wall surface of the bearing housing, a rib assembly provided inside the installation space, the rib assembly including a plurality of first ribs and second ribs, the first ribs being provided in plurality and disposed at intervals in a circumferential direction of the bearing housing, one end of the first ribs being connected to the bearing housing, the other end of the first ribs extending in a radial direction of the cover body and being connected to the annular protrusion, and a second rib being provided between two adjacent first ribs in the circumferential direction of the bearing housing, a distance between a first end of the second ribs and an axis of the bearing housing being smaller than a distance between a second end of the second ribs and an axis of the bearing housing. Further, the second end of the second reinforcing bead is located upstream of the first end in the rotational direction of the motor rotor. Further, the first end of the second reinforcing rib is fixedly connected with the outer wall surface of the bearing seat and one end of the first reinforcing rib. Further, the second reinforcing ribs are connected with the first reinforcing ribs to form an included angle A, and the included angle A is more than or equal to 60 degrees and less than or equal to 85 degrees. Further, the reinforcing rib assembly further comprises third reinforcing ribs, the third reinforcing ribs extend along the circumferential direction of the bearing seat, the third reinforcing ribs are arranged between every two adjacent first reinforcing ribs, and the third reinforcing ribs and the bearing seat are arranged at intervals along the radial direction of the bearing seat. Further, the second end of the second reinforcing rib is fixedly connected with the end part of the third reinforcing rib, and/or the third reinforcing rib is coaxially arranged with the bearing seat and the cover body. Further, a plurality of arc-shaped water passing grooves are formed in the end face