CN219322174U

CN219322174U - Structure of motor rotor support and rotor shaft and vehicle

Info

Publication number: CN219322174U
Application number: CN202223442847.4U
Authority: CN
Inventors: 李�浩
Original assignee: Shanghai Rox Intelligent Technology Co Ltd
Current assignee: Shanghai Rox Intelligent Technology Co Ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-07-07
Anticipated expiration: 2032-12-21

Abstract

The utility model provides a structure of a motor rotor bracket and a rotor shaft and a vehicle, wherein the structure of the motor rotor bracket and the rotor shaft comprises a rotor bracket which is formed into a cylinder shape; and a rotor shaft at least partially located within the rotor support; the rotor support and the rotor shaft are integrally formed. The structure of the motor rotor support and the rotor shaft and the vehicle can solve the problem that the rotor support and the rotor shaft are assembled in a pressing way in the prior art.

Description

Structure of motor rotor support and rotor shaft and vehicle

Technical Field

The application relates to the technical field of motors, in particular to a structure of a motor rotor bracket and a rotor shaft and a vehicle.

Background

The motor consists of a motor rotor and a motor stator, which are used for realizing a conversion device of electric energy and mechanical energy, and the motor rotor is a rotating part in the motor. The rotor support and the rotor shaft serve as key components of the motor rotor assembly and mainly play roles in supporting the rotor core and transmitting torque.

In the prior art, the rotor support and the rotor shaft are usually subjected to a forging process, guided by flat keys, and connected together by interference press fitting. However, in the press-fitting process, if the interference between the rotor support and the rotor shaft is too small, the relative rotation between the rotor support and the rotor shaft can be caused under the working condition that the motor has large torque or the positive and negative rotation changes rapidly, so that the torque fluctuation of the motor occurs, and the performance reduction efficiency is further influenced; if the interference between the rotor support and the rotor shaft is too large, the press fitting is difficult, the phenomenon of shaft biting and the like occurs, and the reliability of the motor is affected.

Disclosure of Invention

In view of this, the object of the present application is to provide a structure of a rotor bracket and a rotor shaft of a motor and a vehicle, which are used for solving the problem that the rotor bracket and the rotor shaft are assembled in a pressing way in the prior art.

According to a first aspect of the present utility model there is provided a structure of a motor rotor support and a rotor shaft, wherein the structure of the motor rotor support and the rotor shaft comprises: a rotor bracket formed in a cylindrical shape; and a rotor shaft at least partially located within the rotor support; the rotor support and the rotor shaft are integrally formed.

Preferably, the structure of the motor rotor bracket and the rotor shaft further comprises a connecting part, wherein the connecting part is arranged between the rotor bracket and the rotor shaft and is used for connecting the rotor bracket and the rotor shaft, and the connecting part, the rotor bracket and the rotor shaft are integrally formed.

Preferably, the connecting member is a spoke extending in a radial direction of the rotor shaft.

Preferably, the number of the spokes is plural, and the plural spokes are spaced apart in the circumferential direction of the rotor shaft.

Preferably, the number of spokes is eight, and the eight spokes are uniformly distributed along the circumferential direction of the rotor shaft.

Preferably, the rotor support is formed in a cylindrical shape, and a plurality of key grooves are formed in the outer wall of the rotor support, and the extending direction of the key grooves is parallel to the axis of the rotor support.

Preferably, the number of the key grooves is four, and the four key grooves are uniformly distributed along the circumferential direction of the rotor support.

Preferably, the first end and the second end of the rotor shaft in the axial direction extend out of the rotor bracket, and the first end of the rotor shaft is formed with a spline.

Preferably, the rotor support and the rotor shaft are integrally cast from cast steel.

According to a second aspect of the present utility model there is provided a vehicle, wherein the vehicle comprises a structure of a motor rotor support and a rotor shaft as described above.

According to the structure of the motor rotor support and the rotor shaft, the rotor support is formed into a cylinder shape, the rotor shaft is at least partially positioned in the rotor support, and the rotor shaft and the rotor support are integrally manufactured, so that the press mounting procedure of the rotor support and the rotor shaft can be omitted, and the problem that the press mounting of the rotor support and the rotor shaft in the prior art has defects can be effectively solved.

In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of the structure of a rotor bracket and a rotor shaft of an electric motor according to the present utility model.

Fig. 2 is a schematic view of another angle of the structure of the motor rotor support and rotor shaft according to the present utility model.

Fig. 3 is a schematic view of a further angle of the structure of the rotor support and the rotor shaft of the electric machine according to the utility model.

Reference numerals: 1-a rotor support; 2-rotor shaft; 21-a first end; 22-a second end; 3-spokes; 4-keyway; 5-spline.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the present disclosure. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but rather, obvious variations may be made upon an understanding of the present disclosure, other than operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided solely to illustrate some of the many possible ways of implementing the methods, devices, and/or systems described herein that will be apparent after a review of the disclosure of the present application.

In the entire specification, when an element (such as a layer, region or substrate) is described as being "on", "connected to", "bonded to", "over" or "covering" another element, it may be directly "on", "connected to", "bonded to", "over" or "covering" another element or there may be one or more other elements interposed therebetween. In contrast, when an element is referred to as being "directly on," directly connected to, "or" directly coupled to, "another element, directly on," or "directly covering" the other element, there may be no other element intervening therebetween.

As used herein, the term "and/or" includes any one of the listed items of interest and any combination of any two or more.

Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, component, region, layer or section discussed in examples described herein could also be termed a second member, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatially relative terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to another element would then be oriented "below" or "lower" relative to the other element. Thus, the term "above … …" includes both orientations "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are intended to specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, and/or groups thereof.

Variations from the shapes of the illustrations as a result, of manufacturing techniques and/or tolerances, are to be expected. Accordingly, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacture.

The features of the examples described herein may be combined in various ways that will be apparent after an understanding of the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of the present disclosure.

As shown in fig. 1 to 3, a structure of a rotor holder and a rotor shaft of an electric motor is provided according to a first aspect of the present utility model, the structure of the rotor holder and the rotor shaft of the electric motor including a rotor holder 1 and a rotor shaft 2.

In the following description, a specific structure of the above-described components of the structure of the motor rotor bracket and the rotor shaft and a connection relationship of the above-described components will be specifically described with reference to fig. 1 to 3.

As shown in fig. 1 to 3, in an embodiment, the rotor frame 1 may be formed in a cylindrical shape, and the rotor shaft 2 may be penetrated through the rotor frame 1. The rotor shaft 2 is at least partially located inside the rotor support 1, the rotor support 1 may be connected to a portion of the rotor shaft 2 located inside the rotor support 1, and the rotor support 1 and the rotor shaft 2 are integrally provided, i.e. they are integrally formed. Therefore, the press mounting procedure of the rotor support and the rotor shaft of the motor can be omitted, and the problem caused by press mounting is avoided.

Preferably, as shown in fig. 1 to 3, in the embodiment, the rotor support 1 may be formed in a cylindrical shape, the axis of which may be collinear with the axis of the rotor shaft 2, and both ends of the rotor support 1 in the axial direction may be open ends for the end portions of the rotor shaft 2 to protrude. And a key slot 4 can be formed on the outer wall of the rotor bracket 1. The key groove 4 may be a square groove with a length equal to the axial length of the rotor support 1, and the extending direction of the key groove 4 is parallel to the axis of the rotor support 1.

Further, it is preferable that in an embodiment, the number of the key grooves 4 may be plural, that is, plural key grooves 4 parallel to the axis of the rotor bracket 1 may be opened on the outer wall of the rotor bracket 1. Specifically, the number of the key grooves 4 may be four, the four key grooves 4 may be uniformly distributed along the circumference of the rotor support 1, and the included angle between two adjacent key grooves 4 is 90 °, and the four key grooves 4 are used for playing a positioning role in the process of installing the iron core on the rotor support 1. However, without limitation, the number of keyways is four, which is only one preferable case in the embodiment, and in the actual use process, the number of keyways can be adaptively changed according to the actual requirement, for example, five keyways are uniformly arranged on the outer surface of the rotor bracket along the circumferential direction according to the actual requirement.

Preferably, as shown in fig. 1 to 3, in an embodiment, a first end 21 in an axial direction of the rotor shaft 2 and a second end 22 in an axial direction of the rotor shaft 2 may each protrude from the rotor bracket 1 for connecting other components, and the first end 21 and the second end 22 may be opposite to each other. The diameter of the rotor shaft 2 may then taper stepwise from the centre to the ends in the axial direction, such that the diameter of the first end 21 of the rotor shaft 2 and the diameter of the second end 22 of the rotor shaft 2 are smaller than the diameter of the part of the rotor shaft 2 located within the rotor support 1.

Further, preferably, as shown in fig. 1 to 3, in an embodiment, the first end 21 of the rotor shaft 2 may protrude by a length greater than the second end 22 of the rotor shaft 2, and a spline 5 for connection with a decelerator or a torsional damper may be provided at an end of the first end 21 of the rotor shaft 2.

Preferably, as shown in fig. 1 to 3, in an embodiment, the structure of the motor rotor bracket and the rotor shaft may further include a connection part. The connecting member may be provided between the rotor support 1 and the rotor shaft 2 for connecting the rotor support 1 and the rotor shaft 2, and the connecting member itself may be integrally formed with the rotor support 1 and the rotor shaft 2.

Further, preferably, as shown in fig. 1 to 3, in an embodiment, the connecting member may be a spoke 3. The extending direction of the spoke 3 may be the radial direction of the rotor shaft 2, the first end of the spoke 3 in the length direction may be connected to the inner surface of the rotor support 1, and the second end of the spoke 3 in the length direction may be connected to the outer surface of the rotor shaft 2, so as to connect the rotor shaft 2 with the rotor support 1. Preferably, in an embodiment, the rotor shaft 2, the rotor support 1 and the spokes 3 may be integrally cast from cast steel.

Specifically, as shown in fig. 1 to 3, in the embodiment, the first ends of the spokes 3 may be connected to the central position of the inner wall of the rotor support 1, and the second ends of the spokes 3 may be connected to the position of the rotor shaft 2 where the radial dimension is the largest, so that the connection strength between the rotor support 1 and the rotor shaft 2 can be higher. Preferably, the number of the spokes 3 may be plural, and the plural spokes 3 are circumferentially spaced apart at the outer periphery of the rotor shaft 2. Further, the number of spokes 3 may be eight, and the eight spokes 3 are uniformly distributed at the outer periphery of the rotor shaft 2. The spoke 3 is adopted as a connecting part, so that the whole weight of the motor can be reduced under the condition of ensuring the connecting strength.

Further, according to a second aspect of the present utility model, there is provided a vehicle including the structure of the motor rotor bracket and the rotor shaft as described above.

In the actual use process, the rotor shaft 2, the rotor support 1 and the spokes 3 are integrally cast, so that the press fitting procedure of the rotor shaft 2 and the rotor support 1 is omitted, and the problem that the interference between the rotor shaft 2 and the rotor support 1 is too large or too small is avoided. And this arrangement enables the construction of the motor rotor support and rotor shaft to withstand greater torque, enabling the peak torque at the first end 21 of the rotor shaft 2 to reach 350Nm.

Finally, it should be noted that: the foregoing examples are merely specific embodiments of the present application, and are not intended to limit the scope of the present application, but the present application is not limited thereto, and those skilled in the art will appreciate that while the foregoing examples are described in detail, the present application is not limited thereto. Any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or make equivalent substitutions for some of the technical features within the technical scope of the disclosure of the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A structure of a motor rotor support and a rotor shaft, characterized in that the structure of the motor rotor support and the rotor shaft comprises:

a rotor bracket formed in a cylindrical shape; and

a rotor shaft at least partially located within the rotor support;

the rotor support and the rotor shaft are integrally formed.

2. The structure of a motor rotor bracket and a rotor shaft according to claim 1, further comprising a connection member provided between the rotor bracket and the rotor shaft for connecting the rotor bracket and the rotor shaft, the connection member being integrally formed with the rotor bracket and the rotor shaft.

3. A structure of a rotor support and a rotor shaft of an electric machine according to claim 2, characterized in that the connection part is a spoke, the extension direction of which spoke is radial to the rotor shaft.

4. A structure of a motor rotor support and rotor shaft according to claim 3, wherein the number of spokes is plural, and a plurality of the spokes are spaced apart along the circumference of the rotor shaft.

5. The structure of a motor rotor support and rotor shaft of claim 4, wherein the number of spokes is eight, the eight spokes being evenly distributed along the circumference of the rotor shaft.

6. The structure of a rotor holder and a rotor shaft for an electric motor according to claim 1, wherein the rotor holder is formed in a cylindrical shape, and a plurality of key grooves are opened on an outer wall of the rotor holder, and an extending direction of the key grooves is parallel to an axis of the rotor holder.

7. The structure of a motor rotor support and rotor shaft of claim 6, wherein the number of keyways is four, the four keyways being evenly distributed along the circumference of the rotor support.

8. The structure of a rotor bracket and a rotor shaft of an electric motor according to claim 1, wherein first and second ends of the rotor shaft in an axial direction each protrude from the rotor bracket, and the first end of the rotor shaft is formed with a spline.

9. The structure of a motor rotor bracket and rotor shaft of claim 1, wherein the rotor bracket and rotor shaft are integrally cast from cast steel material.

10. A vehicle characterized in that it comprises the structure of the motor rotor bracket and rotor shaft according to any one of claims 1 to 9.