Motor end cover structure and motor

Abstract

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

Description

Technical Field

[0001] This utility model relates to the field of motor-related technology, specifically to a motor end cover structure and a motor. Background Technology

[0002] In the design of electric drive systems for new energy vehicles, the end cover, as a crucial component, bears the key functions of fixing the motor shaft and supporting the bearings. Traditional motor end cover bearing housing designs typically employ a radially uniformly distributed reinforcing rib structure. This design aims to improve the radial stiffness of the bearing housing to cope with radial vibrations generated during motor operation. During motor operation, especially at high speeds, electromagnetic forces and mechanical motion cause complex vibration modes, including radial and tangential vibrations. Radial vibration is transmitted to the end cover through the bearing housing, leading to end cover deformation and noise—one of the issues that current designs can relatively well address.

[0003] However, existing motor end cover bearing housing structures are not ideal for suppressing tangential vibration. Although radial stiffeners can disperse and mitigate the effects of radial vibration to some extent, tangential vibration, which is equally significant during motor operation, is prone to cause large deformation of the end cover due to the lack of specific structural support. This leads to higher-frequency noise, severely impacting the vehicle's NVH (noise, vibration, and harshness) performance and reducing the driving experience. Specifically, tangential vibration mainly manifests as nonlinear vibration modes such as the 8th and 24th orders of the motor. The vibration energy in these modes is difficult to effectively disperse or absorb using traditional radial stiffeners. Therefore, existing technologies have significant shortcomings in suppressing tangential vibration.

[0004] As can be seen from the above, the existing motor end cover has the problem of being unable to overcome tangential vibration, which affects the motor performance. Utility Model Content

[0005] The main objective of this invention is to provide a motor end cover structure and a motor to solve the problem that the existing motor end cover cannot overcome tangential vibration, which affects the motor performance.

[0006] To achieve the above objectives, according to one aspect of the present invention, a motor end cover structure is provided. The motor end cover structure includes a cover body, the outer periphery of which has an annular protrusion extending circumferentially along the cover body; a bearing seat, disposed on the cover body and extending in the same direction as the annular protrusion, wherein an annular mounting space is formed between the inner wall surface of the annular protrusion and the outer wall surface of the bearing seat; and a reinforcing rib assembly, disposed inside the mounting space, the reinforcing rib assembly including a first reinforcing rib and a second reinforcing rib, wherein a plurality of first reinforcing ribs are provided and spaced apart circumferentially along the bearing seat, one end of the first reinforcing rib is connected to the bearing seat, and the other end of the first reinforcing rib extends radially along the cover body and is connected to the annular protrusion; a second reinforcing rib is provided between two adjacent first reinforcing ribs circumferentially along the bearing seat, wherein the distance between the first end of the second reinforcing rib and the axis of the bearing seat is less than the distance between the second end of the second reinforcing rib and the axis of the bearing seat.

[0007] Furthermore, along the rotation direction of the motor rotor, the second end of the second reinforcing rib is located upstream of the first end.

[0008] Furthermore, the first end of the second reinforcing rib is fixedly connected to the outer wall surface of the bearing housing and one end of the first reinforcing rib.

[0009] Furthermore, the second reinforcing rib connects with the first reinforcing rib to form an included angle A, which satisfies 60°≤A≤85°.

[0010] Furthermore, the reinforcing rib assembly also includes a third reinforcing rib, which extends circumferentially along the bearing housing, and a third reinforcing rib is provided between each two adjacent first reinforcing ribs. The third reinforcing rib is spaced apart from the bearing housing along the radial direction of the bearing housing.

[0011] Furthermore, the second end of the second reinforcing rib is fixedly connected to the end of the third reinforcing rib; and / or the third reinforcing rib is arranged coaxially with the bearing seat and the cover.

[0012] Furthermore, the end face of the annular protrusion has multiple arc-shaped water passage grooves, which are coaxial with the cover body, and the multiple water passage grooves are spaced apart along the circumference of the cover body.

[0013] Furthermore, the motor end cover structure also includes a bearing, which is disposed inside the bearing housing; and / or connecting ears, which are disposed on the outer peripheral surface of the cover body, and multiple connecting ears are provided and spaced apart along the circumference of the cover body.

[0014] Furthermore, multiple first reinforcing ribs are arranged sequentially at equal intervals along the circumference of the bearing housing, and a wiring area is formed between the first and last first reinforcing ribs. The distance between the first and last first reinforcing ribs along the circumference of the bearing housing is greater than the distance between two adjacent first reinforcing ribs.

[0015] According to another aspect of the present invention, an electric motor is provided, the electric motor including the above-described motor end cover structure.

[0016] The present invention provides a motor end cover structure comprising a cover body, a bearing housing, and a reinforcing rib assembly. The outer periphery of the cover body has an annular protrusion extending circumferentially along the cover body. The bearing housing is disposed on the cover body and extends in the same direction as the annular protrusion. An annular mounting space is formed between the inner wall of the annular protrusion and the outer wall of the bearing housing. The reinforcing rib assembly is disposed inside the mounting space. The reinforcing rib assembly includes a first reinforcing rib and a second reinforcing rib. Multiple first reinforcing ribs are provided and spaced apart circumferentially along the bearing housing. One end of each first reinforcing rib is connected to the bearing housing, and the other end extends radially along the cover body and is connected to the annular protrusion. A second reinforcing rib is provided between two adjacent first reinforcing ribs circumferentially along the bearing housing. The distance between the first end of the second reinforcing rib and the axis of the bearing housing is less than the distance between the second end of the second reinforcing rib and the axis of the bearing housing.

[0017] As can be seen from the above, the motor end cover structure of this application adopts a structure in which the first reinforcing rib and the second reinforcing rib are set together to form a reinforcing structure of the cover between the bearing seat and the annular protrusion. It not only has the effect of radial vibration reduction, but also has a good vibration reduction effect in the tangential direction. The setting of the first reinforcing rib and the second reinforcing rib not only strengthens the rigidity and strength of the cover, but also reduces the tangential and radial vibration during motor operation, thereby greatly reducing the noise generated therefrom and ensuring the stability and reliability of the motor during operation.

[0018] The second reinforcing rib of this application adopts a structure with different distances between its two ends and the axis of the bearing seat. The structure of the second reinforcing rib is set as a tangential support in the same direction as the rotation of the motor, which further increases the rigidity and strength of the cover. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the motor end cover structure of this utility model is shown;

[0021] Figure 2 A three-dimensional structural diagram of the motor end cover structure of this utility model is shown.

[0022] The above figures include the following reference numerals:

[0023] 10. Cover; 110. Installation space; 20. Annular protrusion; 210. Water channel; 30. Bearing seat; 40. Reinforcing rib assembly; 410. First reinforcing rib; 420. Second reinforcing rib; 430. Third reinforcing rib; 50. Bearing; 60. Connecting lug. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0027] To address the problem that existing motor end covers cannot overcome tangential vibration, thus affecting motor performance, this application provides a motor that includes a motor end cover structure. A reinforcing rib assembly 40 is formed by multiple reinforcing ribs on the motor end cover structure. The structure of the reinforcing rib assembly 40 overcomes radial and tangential vibration, thereby ensuring the performance of the motor.

[0028] This application forms a reinforcing rib assembly 40 by combining different reinforcing ribs.

[0029] In this embodiment, the motor is applied to a car to provide power. The motor of this application has stable suction performance, which helps to ensure the NVH (noise, vibration and harshness) performance of the car and improve the driving experience.

[0030] like Figure 1 and Figure 2 As shown, the motor end cover structure includes a cover body 10, a bearing seat 30, and a reinforcing rib assembly 40. The outer periphery of the cover body 10 has an annular protrusion 20 extending circumferentially along the cover body 10. The bearing seat 30 is disposed on the cover body 10 and extends in the same direction as the annular protrusion 20. An annular mounting 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 disposed inside the mounting space 110.

[0031] The annular protrusion 20 and the bearing seat 30 are located on the same end face of the cover 10 and are circular structures extending in the same direction. An annular groove structure is formed between the annular protrusion 20 and the bearing seat 30 along the radial direction of the cover 10. The annular groove structure provides the installation space 110. The reinforcing rib assembly 40 is located inside the installation space 110 and is used to reduce vibration and strengthen the strength of the cover 10.

[0032] In this embodiment, the motor end cover structure also includes a bearing 50, which is disposed inside the annular structure formed by the bearing housing 30. The bearing 50 is fixedly connected to the bearing housing 30. The bearing 50 is provided to support the rotor to ensure stable rotation of the rotor.

[0033] Specifically, the reinforcing rib assembly 40 includes first reinforcing ribs 410 and second reinforcing ribs 420. Multiple first reinforcing ribs 410 are provided and spaced apart circumferentially along the bearing housing 30. One end of each first reinforcing rib 410 is connected to the bearing housing 30, and the other end extends radially along the cover 10 and connects to the annular protrusion 20. A second reinforcing rib 420 is provided between two adjacent first reinforcing ribs 410 along the circumferential direction of the bearing housing 30. The second reinforcing rib 420 is used to overcome tangential vibration during motor operation. The distance between the first end of the second reinforcing rib 420 and the axis of the bearing housing 30 is less than the distance between the second end of the second reinforcing rib 420 and the axis of the bearing housing 30.

[0034] The first ends of the plurality of second reinforcing ribs 420 are formed on a first circumference coaxial with the bearing housing 30, and the second ends of the plurality of second reinforcing ribs 420 are formed on a second circumference coaxial with the bearing housing 30, wherein the radius of the second circumference is greater than the radius of the first circumference.

[0035] The motor end cover structure of this application adopts a structure in which the first reinforcing rib 410 and the second reinforcing rib 420 are arranged in combination to form a reinforcing structure of the cover 10 between the bearing seat 30 and the annular protrusion 20. It not only has a radial vibration reduction effect, but also has a good vibration reduction effect in the tangential direction. The arrangement of the first reinforcing rib 410 and the second reinforcing rib 420 not only strengthens the rigidity and strength of the cover 10, but also reduces the tangential and radial vibration during motor operation, thereby significantly reducing the noise generated therefrom and ensuring the stability and reliability of the motor during operation.

[0036] In this embodiment, during motor operation, the motor rotor rotates along a preset direction, forming an upstream position and a downstream position along the rotor's rotation direction. The second end of the second reinforcing rib 420 is located upstream of the first end, so that the direction of the second reinforcing rib 420 is consistent with the rotation direction of the rotor. The distances between the two ends of the second reinforcing rib 420 and the axis of the bearing housing 30 are different, and the structure of the second reinforcing rib 420 is configured as a tangential support consistent with the motor's rotation direction. This can more effectively transmit and disperse tangential forces, reducing the deformation of the bearing housing 30 under tangential vibration. The principle is that the second end is located upstream of the first end, meaning that when the motor rotates, the tangential force first acts on the second end of the second reinforcing rib 420, is transmitted to the first end through its structure, and then dispersed to the annular protrusion 20 of the cover 10 through the first reinforcing rib 410, forming an effective force transmission path. This reduces the tangential deformation of the bearing housing 30, lowers noise radiation, and improves vibration damping, further increasing the stiffness and strength of the cover 10. This design can significantly improve NVH performance and enhance the user's driving experience.

[0037] like Figure 1 and Figure 2 As shown, the plurality of first reinforcing ribs 410 of this application are arranged at equal intervals along the circumference of the bearing housing 30, and the corresponding plurality of second reinforcing ribs 420 are respectively arranged between two adjacent first reinforcing ribs 410 and point in the rotation direction of the rotor.

[0038] Specifically, the structure of multiple first reinforcing ribs 410 and multiple second reinforcing ribs 420 further achieves the effect of vibration filtering, so as to ensure the structural strength of the cover 10 while ensuring the stability of the motor movement.

[0039] The first end of the second reinforcing rib 420 is fixedly connected to the outer wall of the bearing seat 30 and one end of the first reinforcing rib 410. The three are fixedly connected in one area, which helps to improve the strength of the connection end of the first reinforcing rib 410 and the second reinforcing rib 420, and also further improves the vibration reduction effect.

[0040] Correspondingly, the second reinforcing rib 420 and the first reinforcing rib 410 form an included angle A, wherein the included angle A satisfies 60°≤A≤85°. The angle A can specifically be 60°, 65°, 70°, 75°, 80°, 85°, etc. When the included angle A is too small (less than 60°), it is not conducive to mitigating tangential vibration; when the included angle A is too large (greater than 85°), it is easy to cause installation interference with the bearing housing 30, thus making installation impossible. The arrangement of the included angle A formed by the connection of the second reinforcing rib 420 and the first reinforcing rib 410 in this application helps to reduce force concentration, thereby reducing stress concentration in the bearing housing 30 under tangential vibration, reducing deformation, and reducing noise.

[0041] In this embodiment, along the rotation direction of the rotor, a plurality of first reinforcing ribs 410 are arranged at equal intervals along the circumference of the bearing housing 30. Since the plurality of first reinforcing ribs 410 are arranged along the circumference of the bearing housing 30, a wiring area is formed between the first first reinforcing rib 410 and the last first reinforcing rib 410 among the plurality of first reinforcing ribs 410. The wiring area is used to realize wiring.

[0042] The distance between the first and last reinforcing ribs 410 along the circumference of the bearing housing 30 is greater than the distance between two adjacent reinforcing ribs 410, which makes the wiring area larger and facilitates wiring organization and other wiring operations in this area, such as sorting and fixing the wiring.

[0043] like Figure 1 and Figure 2 As shown, the reinforcing rib assembly 40 also includes a third reinforcing rib 430. The third reinforcing rib 430 extends circumferentially along the bearing seat 30. A third reinforcing rib 430 is provided between each of two adjacent first reinforcing ribs 410. Multiple third reinforcing ribs 430 cooperate to form an arc-shaped structure, and the third reinforcing ribs 430 are spaced apart from the bearing seat 30 along the radial direction of the bearing seat 30.

[0044] Specifically, the third reinforcing rib 430 is arranged circumferentially in the interior of the mounting space 110 along the bearing seat 30. The arrangement of the third reinforcing rib 430, together with the first reinforcing rib 410 and the second reinforcing rib 420, forms a more stable mating structure, which further improves the vibration reduction effect and increases the structural strength of the cover 10.

[0045] The second end of the second reinforcing rib 420 is fixedly connected to the end of the third reinforcing rib 430. The second end of the second reinforcing rib 420 and the end of the third reinforcing rib 430 are both fixedly connected to the first reinforcing rib 410. The structure in which the three are fixedly connected is conducive to improving the strength of the structure and ensuring the strength and vibration reduction effect of the cover 10.

[0046] In this embodiment, the third reinforcing rib 430 is arranged coaxially with the bearing housing 30 and the cover 10. This structure, in which the third reinforcing rib 430 is arranged coaxially with the bearing housing 30 and the cover 10, helps to further reduce the vibration generated during motor operation.

[0047] In this embodiment, seven first reinforcing ribs 410 are provided, arranged sequentially along the circumference of the bearing housing 30. Adjacent first reinforcing ribs 410 form a 45° angle, and the first and last first reinforcing ribs 410 form a 90° angle. Second reinforcing ribs 420 and third reinforcing ribs 430 are not provided inside the wiring area of ​​this application to avoid affecting wiring. The connection area between the third reinforcing rib 430 and the first reinforcing rib 410 is equidistant from both ends of the first reinforcing rib 410 along the radial direction of the bearing housing 30.

[0048] like Figure 1 and Figure 2 As shown, the annular protrusion 20 has multiple arc-shaped water passage grooves 210 on the end face of the protrusion end. The water passage grooves 210 are coaxial with the cover body 10, and the multiple water passage grooves 210 are arranged at intervals along the circumference of the cover body 10.

[0049] Specifically, to improve the waterproofness of the motor, a water channel 210 is provided on the motor end cover structure to drain rainwater and other water.

[0050] The circumferentially extended arc-shaped water passage 210 structure is designed to better drain rainwater and other liquids along the circumference of the cover 10. The multiple water passages 210 are also used to provide waterproofing for the motor end cover structure.

[0051] In this embodiment, the motor end cover structure further includes connecting ears 60, which are disposed on the outer peripheral surface of the cover body 10. Multiple connecting ears 60 are provided and spaced apart circumferentially along the cover body 10. The arrangement of multiple connecting ears 60 facilitates the movement and installation of the cover body 10.

[0052] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0053] The motor end cover structure of this application adopts a structure in which the first reinforcing rib 410 and the second reinforcing rib 420 are arranged in combination to form a reinforcing structure of the cover 10 between the bearing seat 30 and the annular protrusion 20. It not only has a radial vibration reduction effect, but also has a good vibration reduction effect in the tangential direction. The arrangement of the first reinforcing rib 410 and the second reinforcing rib 420 not only strengthens the rigidity and strength of the cover 10, but also reduces the tangential and radial vibration during motor operation, thereby significantly reducing the noise generated therefrom and ensuring the stability and reliability of the motor during operation.

[0054] The second reinforcing rib 420 of this application adopts a structure with different distances between its two ends and the axis of the bearing seat 30. The structure of the second reinforcing rib 420 is set as a tangential support consistent with the rotation direction of the motor, which further increases the rigidity and strength of the cover 10.

[0055] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0056] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0057] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A motor end cover structure, characterized in that, include: The cover (10) has an annular protrusion (20) extending circumferentially along the outer periphery of the cover (10); A bearing housing (30) is disposed on the cover (10) and extends in the same direction as the annular protrusion (20). An annular mounting space (110) is formed between the inner wall surface of the annular protrusion (20) and the outer wall surface of the bearing housing (30). A reinforcing rib assembly (40) is disposed inside the mounting space (110). The reinforcing rib assembly (40) includes a first reinforcing rib (410) and a second reinforcing rib (420). Multiple first reinforcing ribs (410) are provided and spaced apart circumferentially along the bearing seat (30). One end of the first reinforcing rib (410) is connected to the bearing seat (30), and the other end of the first reinforcing rib (410) extends radially along the cover (10) and is connected to the annular protrusion (20). A second reinforcing rib (420) is provided between two adjacent first reinforcing ribs (410) circumferentially along the bearing seat (30). The distance between the first end of the second reinforcing rib (420) and the axis of the bearing seat (30) is less than the distance between the second end of the second reinforcing rib (420) and the axis of the bearing seat (30).

2. The motor end cover structure according to claim 1, characterized in that, Along the rotation direction of the motor rotor, the second end of the second reinforcing rib (420) is located upstream of the first end.

3. The motor end cover structure according to claim 1, characterized in that, The first end of the second reinforcing rib (420) is fixedly connected to the outer wall surface of the bearing seat (30) and one end of the first reinforcing rib (410).

4. The motor end cover structure according to claim 3, characterized in that, The second reinforcing rib (420) is connected to the first reinforcing rib (410) to form an included angle A, wherein the included angle A satisfies 60°≤A≤85°.

5. The motor end cover structure according to claim 1, characterized in that, The reinforcing rib assembly (40) also includes: The third reinforcing rib (430) extends circumferentially along the bearing seat (30), and the third reinforcing rib (430) is provided between two adjacent first reinforcing ribs (410). The third reinforcing rib (430) is spaced apart from the bearing seat (30) along the radial direction of the bearing seat (30).

6. The motor end cover structure according to claim 5, characterized in that, The second end of the second reinforcing rib (420) is fixedly connected to the end of the third reinforcing rib (430); and / or The third reinforcing rib (430) is coaxially arranged with the bearing seat (30) and the cover (10).

7. The motor end cover structure according to claim 1, characterized in that, The annular protrusion (20) has multiple arc-shaped water passage grooves (210) on the end face of the protrusion end. The water passage grooves (210) are coaxial with the cover (10), and the multiple water passage grooves (210) are arranged at intervals along the circumference of the cover (10).

8. The motor end cover structure according to claim 1, characterized in that, The motor end cover structure also includes: Bearing (50), said bearing (50) being disposed inside said bearing housing (30); and / or Connecting ears (60) are provided on the outer peripheral surface of the cover (10), and multiple connecting ears (60) are provided and spaced apart along the circumference of the cover (10).

9. The motor end cover structure according to any one of claims 1 to 8, characterized in that, Multiple first reinforcing ribs (410) are arranged at equal intervals along the circumference of the bearing seat (30). A wiring area is formed between the first first reinforcing rib (410) and the last first reinforcing rib (410) in the multiple first reinforcing ribs (410). The distance between the first first reinforcing rib (410) and the last first reinforcing rib (410) along the circumference of the bearing seat (30) is greater than the distance between two adjacent first reinforcing ribs (410).

10. An electric motor, characterized in that, The motor includes the motor end cover structure as described in any one of claims 1 to 9.

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