Motor end cover and bearing chamber insert structure thereof

Abstract

The utility model relates to a motor end cover and a bearing chamber insert structure thereof, the whole bearing chamber insert is annular, the outer side wall of the bearing chamber insert is provided with a plurality of flat concave surfaces at intervals, and the lower part of the inner wall of the bearing chamber insert is also provided with a convex edge for supporting a bearing. According to the bearing chamber insert disclosed by the utility model, a bulge / groove on the outer wall is canceled as an anti-rotation and anti-disengagement characteristic; the plane concave surface is matched with the inner wall of the bearing chamber to prevent radial rotation, and the buckling edge on the end cover is utilized to prevent the bearing chamber insert from axially dropping, so that the structure of the bearing chamber is simplified, and the processing cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor structures for new energy vehicles, and in particular relates to a motor end cover and a bearing chamber insert structure thereof. Background Art

[0002] In the field of new energy vehicles, the motor is the main power output component, which generally has a high speed and drives the wheels through the reducer and other structures. In order to match the high-speed operation requirements of the bearing, the bearing chamber of the motor has an independent insert. The insert needs to meet the requirements of high hardness and wear resistance. At the same time, the radial and axial directions of the insert need to have protrusions / grooves as anti-rotation and disengagement features. Therefore, the current bearing chamber inserts have the following problems:

[0003] There is a thin layer of flash on the end face of the motor housing at the insert, which is easy to fall off and fall into the bearing chamber, affecting the service life of the bearing. At the same time, due to the high hardness of the insert, a separate diamond milling cutter / turning tool is required for the processing of the insert, which has a certain cost, and the tool is prone to chipping when processing protrusions / grooves, further increasing costs. Utility Model Content

[0004] In order to solve the above technical problems, the first purpose of the utility model is to provide a bearing chamber insert structure with simple structure and convenient processing. The second purpose of the utility model is to provide a motor end cover.

[0005] In order to achieve the above-mentioned first utility model purpose, the utility model adopts the following technical solutions:

[0006] A bearing chamber insert structure is provided. The bearing chamber insert is annular as a whole, and a plurality of flat concave surfaces are arranged at intervals on the outer wall. A convex edge for supporting a bearing is also arranged at the lower part of the inner wall of the bearing chamber insert.

[0007] As a preferred solution: there are four flat concave surfaces, which are distributed at equal intervals.

[0008] In order to achieve the above second utility model purpose, the utility model adopts the following technical solutions:

[0009] A motor end cover has a bearing chamber in the middle thereof, wherein the bearing chamber is embedded with a bearing chamber insert as described in any one of the above items.

[0010] As a preferred solution: the top of the inner wall of the bearing chamber is further extended inwardly to form a buckle edge, the top of the buckle edge is flush with the top of the bearing chamber, and the bottom of the buckle edge presses against the bearing chamber insert.

[0011] As a preferred solution: the thickness of the buckle edge is greater than or equal to 3.5 mm, and the upper inner side of the buckle edge is chamfered.

[0012] As a preferred solution: the bottom of the bearing chamber is further provided with a convex ridge protruding upward, and the convex ridge abuts against the inner side of the convex edge.

[0013] As a preferred solution: the material of the bearing chamber insert is 45# steel or 40Cr steel with a hardness of 29-34HRC.

[0014] The bearing chamber insert of the utility model eliminates the protrusions / grooves on the outer wall as anti-rotation and anti-escape features; uses the flat concave surface to cooperate with the inner wall of the bearing chamber to prevent radial rotation, and uses the buckle edge on the end cover to prevent the axial escape of the bearing chamber insert, thereby simplifying the bearing chamber structure and reducing processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0016] Figure 1 It is a schematic diagram of the overall structure of the end cover and the bearing chamber insert of the utility model;

[0017] Figure 2 It is a schematic diagram of the exploded structure of the end cover and the bearing chamber insert of the utility model;

[0018] Figure 3 It is a schematic cross-sectional structure diagram of the end cover and the bearing chamber insert of the utility model;

[0019] The reference numerals are: 1, end cover; 11, bearing chamber; 12, buckle edge; 2, bearing chamber insert; 21, flat concave surface; 22, convex edge. DETAILED DESCRIPTION

[0020] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0027] like Figures 1 to 3A motor end cover is shown, the middle of the end cover 1 is provided with a bearing chamber 11, the bearing chamber 11 is embedded with a bearing chamber insert 2, the bearing chamber insert 2 is annular as a whole, and a plurality of flat concave surfaces 21 are arranged at intervals on the outer wall, and a convex edge 22 for supporting the bearing is also arranged at the lower part of the inner wall of the bearing chamber insert 2. The convex edge 22 can limit the axial position of the bearing, which is convenient for installation. In a specific embodiment, there are four flat concave surfaces 21 on the outer wall of the bearing chamber insert 2, and they are distributed at equal intervals. The flat concave surface 21 is close to the inner wall of the end cover bearing chamber, which can prevent the radial rotation of the bearing chamber insert.

[0028] The bearing chamber insert 2 is made of 45# steel or 40Cr steel with a hardness of 29-34HRC. The above structure can meet the requirements of high-speed rotation of the bearing.

[0029] The top of the inner wall of the bearing chamber 11 is also extended inwardly to form a buckle edge 12, the top of the buckle edge 12 is flush with the top of the bearing chamber 11, and the bottom of the buckle edge 12 is pressed against the bearing chamber insert 2. The thickness of the buckle edge 12 is greater than or equal to 3.5 mm, and the upper inner side of the buckle edge 12 is chamfered.

[0030] According to CAE calculations, the upper end of the bearing chamber insert is covered with an aluminum-clad edge greater than or equal to 3.50 mm, which meets the mechanical strength requirements and can prevent axial disengagement. The thickness of the edge can meet the requirements of die-casting, and the upper end face is free of defects such as flash, with higher processing quality. The entire end cover and its bearing chamber insert processing process reduces the problem of chipping at the steel / aluminum junction and directly reduces a milling cutter / turning tool, greatly reducing costs.

[0031] The bottom of the bearing chamber 11 is also provided with a convex ridge 13 protruding upward, and the convex ridge 13 abuts against the inner side of the convex edge 22. The convex ridge limits the radial direction of the bearing, ensures that the bearing works more stably, and increases the service life of the bearing.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0033] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A bearing chamber insert structure, characterized in that: The bearing chamber insert (2) is annular as a whole, and a plurality of flat concave surfaces (21) are provided at intervals on the outer wall. The lower part of the inner wall of the bearing chamber insert (2) is also provided with a convex edge (22) for supporting the bearing.

2. A bearing chamber insert structure according to claim 1, characterized in that: There are four flat concave surfaces (21) which are distributed at equal intervals.

3. A motor end cover, wherein a bearing chamber (11) is provided in the middle of the end cover (1), characterized in that: The bearing chamber (11) is embedded with a bearing chamber insert (2) as claimed in claim 1 or 2.

4. The motor end cover according to claim 3, characterized in that: The top of the inner wall of the bearing chamber (11) is also provided with a buckle edge (12) extending inwardly, the top of the buckle edge (12) is flush with the top of the bearing chamber (11), and the bottom of the buckle edge (12) is pressed against the bearing chamber insert (2).

5. The motor end cover according to claim 4, characterized in that: The thickness of the buckle edge (12) is greater than or equal to 3.5 mm, and a chamfer is provided on the inner side of the upper portion of the buckle edge (12).

6. The motor end cover according to claim 3, characterized in that: The bottom of the bearing chamber (11) is also provided with a convex ridge (13) protruding upwards, and the convex ridge (13) abuts against the inner side of the convex edge (22).

7. The motor end cover according to claim 3, characterized in that: The bearing chamber insert (2) is made of 45# steel or 40Cr steel with a hardness of 29-34HRC.

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