CN213846440U

CN213846440U - Lightweight motor rotating shaft

Info

Publication number: CN213846440U
Application number: CN202022833436.2U
Authority: CN
Inventors: 刘蕾; 程勇; 程琦; 郭殿伟
Original assignee: Hefei JEE Power System Co Ltd
Current assignee: Hefei JEE Power System Co Ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-07-30
Anticipated expiration: 2030-12-01

Abstract

The utility model discloses a light motor rotating shaft, which comprises a middle section and a rotary section; one end of the middle section is processed into a spline, and the other end of the middle section is processed into a cylinder with a cavity; a spigot is processed at one end of the rotary deformation section, and a closing-in is processed at the other end of the rotary deformation section; the cylindrical end part of the middle section is fixedly arranged on the spigot of the rotary-deformation section. The cylindrical end part of the middle section is in interference fit with the spigot of the rotary-deformation section. The end face of the cylindrical end part of the middle section is a first welding face, the side wall of the seam allowance of the rotary-deformation section is a second welding face, and the joint of the first welding face and the second welding face is welded to form a whole. The middle section is integrally formed by casting. The rotary deformation section is formed by machining or forging. The utility model discloses a motor shaft compares with traditional solid axle of motor, under the equal volume condition, the utility model discloses scheme weight is lower, can realize the motor lightweight, and performance such as its dynamic balance, intensity, rigidity simultaneously are equivalent.

Description

Lightweight motor rotating shaft

Technical Field

The utility model relates to a motor shaft, in particular to lightweight motor shaft.

Background

At present, the driving motor technology is mainly developed towards light weight. A large number of researches show that the energy loss of the automobile is in direct proportion to the mass of the automobile, and the light weight of the automobile is an important means for reducing the energy loss of the new energy automobile and improving the driving mileage. The new energy pure electric vehicle driving system usually accounts for 30% -40% of the total mass of the vehicle, and the light weight of the driving system is one of the key points of the light weight of the whole vehicle. The automobile driving motor is a core driving part of a new energy automobile, and needs to meet the dynamic requirements of all working conditions of the automobile in a limited arrangement space, so that a high-efficiency, safe and reliable high-power-density motor is designed in a smaller space, and the key problems of realizing motor lightweight, reducing automobile energy loss and needing to be solved are solved.

The motor shaft is designed in a light weight mode, the rigidity of the transmission shaft can be kept, the quality of the transmission shaft can be reduced, and the problem of energy loss of a new energy automobile is solved.

Most motor shafts of new energy automobiles on the market are solid shafts, even though the motor shafts are hollow shafts, most of the motor shafts are also machined and drilled, or pipes are adopted for machining, so that the manufacturing difficulty is high, the dynamic balance is poor, the rigidity is poor, the motor cost is increased, the energy loss is high, the energy density of the whole automobile is reduced, and the cruising ability is reduced.

The lightweight pivot structure of current scheme divide into the two-stage process, the interlude with change the section soon, the interlude is hollow structure, the preparation scheme adopts the finish forging technology, compare with machining, the material cost that has significantly reduced, interlude right-hand member hole is little, close up technology is difficult to control size, the event will change the section soon and process alone, then with the two-stage process welding, the forging degree of difficulty has been reduced, simultaneously under this welded structure, interlude right-hand member through-hole can seal, and under sealing, can reduce wind and make an uproar, reduce motor noise. Finally, compared with a solid shaft, the scheme has the advantages that the dynamic balance precision is not large, the level is almost equivalent, the weight is lighter and the material is less under the rotating shaft structure with the same volume, and the motor cost is reduced.

The prior art has the following disadvantages:

1. the existing market motor solid shaft is heavy in weight and high in material cost

2. Most of the hollow shafts of the motors in the existing market are also drilled by machining or are machined by adopting pipes, so that the manufacturing difficulty is higher, the dynamic balance is poorer, and the rigidity is poorer.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the utility model provides a lightweight motor shaft, solves following technical problem:

1. the mass of the motor shaft is reduced, and the motor is light.

2. The material of the shaft is reduced, and the cost of raw materials is reduced;

3. the machining of the shaft is reduced, and the manufacturing cost is reduced;

4. compared with a solid shaft with the same volume, the shaft has the same properties of dynamic balance, strength, rigidity and the like.

The technical scheme of the utility model is that:

a light motor rotating shaft comprises a middle section and a rotary section; one end of the middle section is processed into a spline, and the other end of the middle section is processed into a cylinder with a cavity; a spigot is processed at one end of the rotary deformation section, and a closing-in is processed at the other end of the rotary deformation section; the cylindrical end part of the middle section is fixedly arranged on the spigot of the rotary-deformation section.

Preferably, the cylindrical end part of the middle section is in interference fit with the spigot of the rotary-deformation section.

Preferably, the end face of the cylindrical end part of the middle section is a first welding face, the side wall on the spigot of the rotary-deformation section is a second welding face, and the joint of the first welding face and the second welding face is welded to form a whole.

Preferably, the intermediate section is integrally formed by casting.

Preferably, the rotary deformation section is formed by machining or forging.

The utility model has the advantages that:

1. compared with the traditional solid motor shaft, the motor rotating shaft has lower weight and can realize motor lightweight under the condition of the same volume, and simultaneously, the dynamic balance, the strength, the rigidity and other performances of the motor rotating shaft are equivalent;

2. compared with the hollow shaft on the market, the hollow shaft of the driving motor on the market has the advantages that the forging process is adopted, so that the material can be saved, the machining cost is reduced, and the cost is reduced;

3. the utility model discloses the scheme adopts two sections welded modes, can reduce the degree of difficulty of hollow shaft forging process, and under this welded structure, the closure can be accomplished to hollow rotating shaft simultaneously, and under the closure, can reduce wind and make an uproar, reduces the motor noise.

4. The utility model discloses the scheme is owing to adopt welded structure, and the synchronous processing of hole excircle, the axiality is better, adopts interference fit before the welding both ends, and the welding is warp hardly, so can control at both ends unbalance amount, and pivot dynamic balance level is higher.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a sectional view of a motor shaft according to the present invention;

FIG. 2 is a schematic view of a middle section of a motor shaft according to the present invention;

FIG. 3 is a schematic view of a rotary section of a motor shaft according to the present invention;

fig. 4 is an overall schematic view of the motor shaft.

Detailed Description

As shown in fig. 1-4, the lightweight motor shaft 8 of the present invention includes an intermediate section 1 and a rotary section 2.

One end of the middle section 1 is processed into a spline 7, and the other end of the middle section is processed into a cylinder with a cavity 6; the end face of the cylindrical end of the intermediate section 1 is a first welding face 3. The intermediate section 1 is integrally formed by casting.

A spigot 4 is processed at one end of the rotary-change section 2, and a closing-in 5 is processed at the other end; the side wall on the spigot 4 of the rotary-change section 2 is a second welding surface 9. The rotary deformation section 2 is formed by machining or forging.

The cylindrical end part of the middle section 1 is fixedly arranged on the spigot 4 of the rotary-change section 2. The cylindrical end part of the middle section 1 is in interference fit with the spigot 4 of the rotary-change section 2. After the installation, the joint of the first welding surface 3 and the second welding surface 9 is welded to form a whole.

Compared with the traditional solid motor shaft, the motor rotating shaft has lower weight and can realize motor lightweight under the condition of the same volume, and simultaneously, the dynamic balance, the strength, the rigidity and other performances of the motor rotating shaft are equivalent; compared with the hollow shaft which is machined and drilled or machined by adopting a pipe material on the market, the scheme of the utility model adopts the forging process, so that the material can be saved, the machining cost is reduced, and the cost is reduced;

the utility model discloses the scheme is owing to adopt welded structure, and the synchronous processing of hole excircle, the axiality is better, adopts interference fit before the welding both ends, and the welding is warp hardly, so can control at both ends unbalance amount, and pivot dynamic balance level is higher.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A light motor rotating shaft is characterized by comprising a middle section (1) and a rotary-variable section (2); one end of the middle section (1) is processed into a spline (7), and the other end of the middle section is processed into a cylinder with a cavity (6); one end of the rotary deformation section (2) is provided with a spigot (4), and the other end of the rotary deformation section is provided with a closing-in (5); the cylindrical end part of the middle section (1) is fixedly arranged on the spigot (4) of the rotary-change section (2).

2. The lightweight motor shaft according to claim 1, wherein the cylindrical end of the intermediate section (1) is fitted into the spigot (4) of the rotary-change section (2) in an interference fit manner.

3. The lightweight motor shaft according to claim 2, wherein an end surface of the cylindrical end portion of the intermediate section (1) is a first welding surface (3), a side wall of the spigot (4) of the rotary-change section (2) is a second welding surface (9), and a joint of the first welding surface (3) and the second welding surface (9) is welded to form a whole.

4. The lightweight motor shaft according to claim 3, wherein the intermediate section (1) is integrally formed by casting.

5. The lightweight motor shaft according to claim 3, wherein the rotary-deformation section (2) is formed by machining or forging.