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CN-224233461-U - Motor casing, shell assembly and vehicle

CN224233461UCN 224233461 UCN224233461 UCN 224233461UCN-224233461-U

Abstract

The application provides a motor casing, a casing assembly and a vehicle, wherein the motor casing comprises a casing main body, an armature cavity is formed in the casing main body, at least two oil return channels are formed in the casing main body, and the at least two oil return channels are communicated with the armature cavity; wherein, at least two oil return channels are distributed at opposite ends of the shell main body along the axial direction of the armature cavity. The service life of the motor in the vehicle is longer.

Inventors

  • ZHANG MING

Assignees

  • 长城新能源商用车有限公司

Dates

Publication Date
20260512
Application Date
20250407

Claims (10)

  1. 1. The motor casing is characterized by comprising a casing main body, wherein an armature cavity is formed in the casing main body, at least two oil return channels are formed in the casing main body, and at least two oil return channels are communicated with the armature cavity; Wherein, at least two oil return channels are distributed at opposite ends of the shell main body along the axial direction of the armature cavity.
  2. 2. The motor housing of claim 1, wherein the at least two oil return passages include a first passage and a second passage; the axial direction of the armature cavity extends along the front-rear direction, the first channel is positioned at the front side of the second channel, the first channel is provided with a first oil inlet, the second channel is provided with a second oil inlet, after the installation of the shell main body is finished, the first oil inlet and the second oil inlet are positioned at one side of the armature cavity facing downwards, and the position of the first oil inlet is lower than that of the second oil inlet; The opening area of the first oil inlet is larger than that of the second oil inlet.
  3. 3. The motor housing according to claim 2, wherein an opening area of the first oil inlet is 1600 square millimeters or more, and/or, The opening area of the second oil inlet is 803 square millimeters or more, and/or, The first oil inlet is provided with a first center, the second oil inlet is provided with a second center, the distance between the first center and the second center is a first distance, the distance between the first center and the front end of the shell main body is a second distance, the distance between the second center and the bottom wall of the armature cavity is a third distance, the first distance is 1.5 times of the second distance, and the first distance is 1.3 times of the third distance.
  4. 4. The motor housing of claim 2, wherein the housing body further has an electrical connection cavity in communication with the armature cavity; The first channel is also provided with a first oil outlet, after the shell main body is installed, the first channel is obliquely arranged, the first oil outlet is positioned obliquely below the first oil inlet, and the first oil outlet is positioned at one side of the first oil inlet, which is far away from the power connection cavity; An oil baffle plate is detachably connected to the shell main body, the oil baffle plate faces the first oil outlet, and an oil passing gap is formed between the oil baffle plate and the first oil outlet; The oil baffle is provided with a plate surface facing the first oil outlet, and the orthographic projection area of the first oil outlet on the plate surface falls into the plate surface.
  5. 5. The motor housing according to any one of claims 2 to 4, wherein the second passage further has a second oil outlet; The second channel comprises an oil inlet section and an oil outlet section which are sequentially communicated and mutually perpendicular, the oil inlet section is communicated with the armature cavity, the second oil inlet is formed on the oil inlet section, and the second oil outlet is formed on the oil outlet section; Wherein, after the installation of the shell main body is completed, the oil inlet section extends along the vertical direction.
  6. 6. The motor housing of claim 5, further comprising an oil plug disposed at an end of the oil inlet section remote from the second oil inlet, the oil outlet section communicating with a middle portion of the oil inlet section, and/or, The second passage has a circular cross-sectional shape along a radial cross-section of the second passage at any position in the direction of extension of the second passage.
  7. 7. The motor case according to any one of claims 1 to 4, wherein a mounting portion protruding toward a center of the armature chamber is formed on an inner side wall of the case main body; the oil return passage is partially formed in the mounting portion.
  8. 8. A housing assembly comprising a transmission housing and the motor housing of any one of claims 1 to 7; wherein, a speed changing cavity is arranged in the speed changing shell, the armature cavity is communicated with the speed changing cavity through at least two oil return channels, and/or, The motor casing is integrally arranged above the transmission casing in an inclined manner.
  9. 9. A vehicle comprising an armature, an electronic oil pump, a speed change gear assembly and the housing assembly of claim 8, wherein the armature is mounted in the armature cavity, the electronic oil pump is arranged below the motor casing, and the speed change gear assembly is arranged in the speed change cavity; the first oil outlet of the motor casing is arranged towards the speed change gear assembly.
  10. 10. The vehicle of claim 9, wherein the electronic oil pump has an outer surface disposed toward the motor housing; Wherein, the first oil inlet of motor casing is in at least part of orthographic projection region on the face that the surface is located falls on the surface.

Description

Motor casing, shell assembly and vehicle Technical Field The application relates to the technical field of vehicles, in particular to a motor shell, a shell assembly applying the motor shell and a vehicle applying the shell assembly. Background At present, the oil-cooled motor is widely applied to the fields of new energy driving, high-density industrial motors and the like by directly contacting cooling oil with core heating components such as armatures, bearings and the like to realize heat dissipation. In the related art, an oil-cooled motor generally comprises a shell and an armature, an armature cavity for installing the armature is formed in the shell, a passive oil return design of combining a single-side bottom oil return hole with a spiral guide rib is adopted on the shell, cooling oil is driven by centrifugal force to flow along the wall surface of the shell in the operation process, and finally returns to an oil way for circulation through the bottom oil return hole. However, in the above oil-cooled motor, when the motor is inclined or operated at a low rotation speed, oil is likely to stay at the distal end of the armature cavity due to uneven gravity distribution, and the armature winding is immersed for a long time due to local oil accumulation in the armature cavity, so that the armature temperature is high, and the service life of the armature is shortened. Disclosure of utility model The embodiment of the application provides a motor shell, a motor shell assembly and a motor vehicle, which can prevent armature windings from being soaked in oil to a certain extent, so that the temperature of the armature is high, and the service life of the armature is prolonged. The application provides a motor shell, which comprises a shell main body, wherein an armature cavity is formed in the shell main body, at least two oil return channels are formed in the shell main body and are communicated with the armature cavity, and the at least two oil return channels are distributed at two opposite ends of the shell main body along the axial direction of the armature cavity. In the application, the oil return channels are distributed at the two axial ends of the armature cavity, and no matter what gesture the motor is in, the oil return channels at the two ends can form multipath oil return channels by utilizing the combined action of gravity and centrifugal force. Specifically, when the motor runs, cooling oil flows to the inner wall of the shell main body under the action of centrifugal force, oil return channels at two ends can simultaneously guide oil to flow back quickly from two axial ends, so that the long-end oil retention caused by single-side oil return is avoided, and under the low-rotation speed or inclined working condition, the gravity action enables the oil to be discharged from the oil return channel with a lower position more easily, so that the local oil accumulation of an armature cavity is reduced. Therefore, not only is the oil circulation path optimized, but also the risk of oil immersion of the armature winding is reduced, so that cooling oil can more uniformly participate in heat dissipation, the temperature of the armature is effectively reduced, and the service lives of the armature and the motor are prolonged. In addition, the layout of the multiple oil return channels can further improve the oil circulation efficiency, ensure that the motor can maintain stable heat dissipation performance under different working conditions, and solve the problem of reliability caused by uneven oil distribution in the related art to a certain extent. The armature cavity comprises a first channel and a second channel, wherein the axial direction of the armature cavity extends along the front-back direction, the first channel is positioned at the front side of the second channel and is provided with a first oil inlet, the second channel is provided with a second oil inlet, after the installation of the shell main body is finished, the first oil inlet and the second oil inlet are positioned at one downward side of the armature cavity, the position of the first oil inlet is lower than that of the second oil inlet, and the opening area of the first oil inlet is larger than that of the second oil inlet. That is, the larger opening area of the first oil inlet means that the armature winding has higher oil circulation capacity, more oil can be discharged in unit time, the circulation speed of the oil at the bottom can be increased by combining the position of the first channel, and the risk of long-time oil immersion of the armature winding is further reduced. As an alternative embodiment, the opening area of the first oil inlet is 1600 square millimeters or more, and the opening area of the second oil inlet is 803 square millimeters or more. Therefore, the oil return quantity can be more than the oil inlet quantity of the motor, so that oil is prevented from accumulating at the bottom of the motor shell to