CN209150860U

CN209150860U - Back end cover for motor

Info

Publication number: CN209150860U
Application number: CN201920081506.8U
Authority: CN
Inventors: 刘蕾; 程琦; 何靖
Original assignee: Hefei JEE Power System Co Ltd
Current assignee: Hefei JEE Power System Co Ltd
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2019-07-23
Anticipated expiration: 2029-01-17

Abstract

The utility model relates to field of automobile parts and components, more particularly to back end cover for motor, including the chassis for connecting electric machine casing, the central region on chassis constitutes arched surface towards the uniform protrusion in outside, the bearing hole for accommodating bearing is offered in the middle part of arched surface, the curved raised line for protruding from its outer surface is provided on the arched surface, the curved raised line is provided with multiple and is circumferentially evenly spaced on along arched surface, is provided on the chassis multiple for connecting the threaded hole of electric machine casing.

Description

Back end cover for motor

Technical field

The utility model relates to field of automobile parts and components, and in particular to back end cover for motor.

Background technique

Rear end cap is structural member important in motor, has the function of fixing and supporting, generally according to different electric machineries Type selects unlike material, and wherein the end cap of New energy automobile motor mostly uses greatly aluminium material, is easy to implement lightweight.In recent years, New energy automobile motor industry surges forward, and industry competition is white-hot day by day, and the design requirement of components is also higher and higher. From vehicle angles, there are three core demands:

1. cost effective, the competition deeply worried point that necessarily each cart is looked forward to of cost reaches same performance, can save more Few cost, is equivalent to that how many profit brought；

2. electric control retarder is integrated into a product by high integration, it is necessary to which component structural is finer smaller Type realizes light-weight design；

3. good NVH characteristic, low noise, low vibration, high smooth degree product can more obtain liking for consumer.

Therefore, the design of rear end cap must simultaneously meet the above 3 points requirement.

Current existing rear end cover structure is in the form of a single, and volume is larger；Rear end cap rib quantity is more, and arrangement form is multiple Miscellaneous multiplicity, causes weight to increase, higher cost；NVH characteristic is poor, and when motor operation is also easy to produce noise.

Utility model content

The purpose of the utility model is to provide a kind of intensity is big, the back end cover for motor of light weight.

To achieve the above object, the utility model uses a kind of following technical scheme: back end cover for motor, including for connecting The chassis of electric machine casing is connect, the central region on chassis constitutes arched surface, the middle part of arched surface towards the uniform protrusion in outside The bearing hole for accommodating bearing is offered, the curved raised line for protruding from its outer surface is provided on the arched surface, it should Curved raised line is provided with multiple and is circumferentially evenly spaced on along arched surface, is provided on the chassis multiple for connecting Connect the threaded hole of electric machine casing.

Due to using the technology described above, replaced with the arched surface of integrated convex it is existing be arranged in cover internal plus Strengthening tendons save material, mitigate weight, on the other hand the structure can also increase on the one hand This structure increases the intensity of end cap The rigidity of end cap, so that end cap is unlikely to deform；Along with the design of curved raised line, the strength and stiffness of end cap are further increased, Improve the NVH characteristic of end cap entirety, noise-decreasing.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is another angle figure of Fig. 1；

Fig. 3 is the main sectional view of Fig. 1；

Fig. 4 is the cross-sectional view of bowing of Fig. 1.

Specific embodiment

A kind of back end cover for motor, including the chassis 10 for connecting electric machine casing, the central region on chassis 10 is towards outside Uniform protrusion constitutes arched surface 20, and the middle part of arched surface 20 offers the bearing hole 21 for accommodating bearing, described The curved raised line 22 for protruding from its outer surface is provided on arched surface 20, which is provided with multiple and along arch Curved surface 20 is circumferential to be evenly spaced on, and is provided on the chassis 10 multiple for connecting the threaded hole 11 of electric machine casing.

Arched surface 20 is smooth whole curved surface in the utility model, is not intended to limit concrete shape.Arched surface 20 whole outwardly convexs, the existing reinforcing rib that cover internal is arranged in are replaced with the arched surface 20 of integrated convex, on the one hand This structure increases the intensity of end cap, save material, mitigate weight, and on the other hand the structure can also increase the rigidity of end cap, So that end cap is unlikely to deform；Along with the design of curved raised line, the strength and stiffness of end cap are further increased, it is whole to improve end cap NVH characteristic, noise-decreasing.

The curved raised line 22 is hollow structure.Curved 22 partial interior of raised line is hollow, and uniform wall thickness can save material Material, alleviates weight, reduces costs

The curved raised line 22 is connected to 20 inner cavity of arched surface and divides arched surface 20 for multiple curved face units 23.The shape of curved face unit 23 may be designed to the various forms of curvilinear structures such as ellipse, arched surface 20 in the utility model It is whole in pyramidal, curved raised line 22 is in bar shaped, and the subtriangular curved surface of curved face unit 23.

The cross sectional shape and radius of curvature of the curved raised line 22 are consistent with arched surface 20.Curved raised line 22 is exactly It is designed along arched surface 20, the two smoothly transits naturally, and stress is avoided to concentrate, and further increases its intensity.

The middle part of the arched surface 20 is also provided with the transformation hole 24 for accommodating transformer, transformation hole 24 and bearing Hole 21 is coaxial and is connected to, and the transformation hole 24 is located at outside, and bearing hole 21 is located inside.Rotation can be used in the utility model Transformer, transformation hole 24 slightly protrude from the top of arched surface 20.

The height that the curved raised line 22 protrudes from arched surface 20 is 8-12mm.

The curved raised line 22 is equipped with 8 altogether.

The quantity and alterable height of curved 22 protrusion of raised line, optimize, the utility model is preferably convex as the case may be Playing quantity is 8, height of projection 10mm, which has two big advantages: 1. improving the NVH characteristic of end cap entirety, subtracts Low noise；2. may replace reinforcing rib, and compared with solid reinforcing rib, material is saved, cost is reduced.

Claims

1. a kind of back end cover for motor, it is characterised in that: including the chassis (10) for connecting electric machine casing, the middle part of chassis (10) Region constitutes arched surface (20) towards the uniform protrusion in outside, and arched surface offers in the middle part of (20) for accommodating bearing Bearing hole (21) is provided with the curved raised line (22) for protruding from its outer surface, the curved raised line on the arched surface (20) (22) it is provided with multiple and is circumferentially evenly spaced on along arched surface (20), the chassis is provided with multiple use on (10) In the threaded hole (11) of connection electric machine casing.

2. back end cover for motor according to claim 1, it is characterised in that: the curved raised line (22) is hollow structure.

3. back end cover for motor according to claim 2, it is characterised in that: the curved raised line (22) and arched surface (20) inner cavity is connected to and arched surface (20) is divided into multiple curved face units (23).

4. back end cover for motor according to claim 1 or 2 or 3, it is characterised in that: the section of the curved raised line (22) Shape and radius of curvature are consistent with arched surface (20).

5. back end cover for motor according to claim 4, it is characterised in that: the middle part of the arched surface (20) also opens up There is the transformation hole (24) for accommodating transformer, transformation hole (24) are coaxial with bearing hole (21) and are connected to, the transformation hole (24) it is located at outside, bearing hole (21) is located inside.

6. back end cover for motor according to claim 5, it is characterised in that: the curved raised line (22) protrudes from arch song The height in face (20) is 8-12mm.

7. back end cover for motor according to claim 6, it is characterised in that: the curved raised line (22) is equipped with 8 altogether.