CN215419937U

CN215419937U - Hub motor of electric vehicle

Info

Publication number: CN215419937U
Application number: CN202121852795.0U
Authority: CN
Inventors: 刘一潭
Original assignee: Xuzhou Science Fiction Electromechanical Equipment Co ltd
Current assignee: Xuzhou Science Fiction Electromechanical Equipment Co ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2022-01-04
Anticipated expiration: 2031-08-09

Abstract

The utility model discloses an electric vehicle hub motor, which belongs to the technical field of electric vehicles and comprises a hub, a motor main body and two end covers for connecting the motor main body and the hub, wherein driving shafts are arranged at two ends of the motor main body, a fixing shaft which is coaxial with the driving shaft and is fixed on a vehicle body is arranged at the end part of the driving shaft, a connecting part is arranged between the fixing shaft and the driving shaft, and the connecting part limits the fixing shaft and the driving shaft to the axial direction and the radial direction under the action of the end covers. According to the utility model, the output end of the motor is provided with the fixed shaft, the fixed shaft is connected with the body of the electric vehicle, and when the end cover is used for connecting the motor and the hub, the driving shaft of the motor is additionally fixedly connected with the two shafts through the connecting part, so that the motor is convenient to disassemble and assemble quickly, the steps are simplified, and the maintenance efficiency is improved.

Description

Hub motor of electric vehicle

Technical Field

The utility model relates to the technical field of electric vehicles, in particular to an electric vehicle hub motor.

Background

With the continuous development of the society, electric motor cars are widely used by the public, the electric motor cars generally use hub motors, which mainly comprise hubs and motors, wherein the hubs comprise wheel rims and wheel rims, and the fixing shafts of the hub motors are connected with flat forks on the frames and do not rotate, so that the motors and the wheel rims rotate together, two ends of the fixing shafts of the common hub motors extend out of the motors and are called double-shaft motors.

In the prior art, as the electric vehicle hub motor disclosed in chinese patent publication No. CN213521493U, the hub and the motor are connected through two end covers, although the hub can be quickly disassembled, the replacement is not convenient, because after the motor is disassembled and the hub is connected, two shafts of the motor are connected with the vehicle body, so the hub can not be taken down, only the maintenance when the disassembly is not needed is facilitated, and for most cases, the disassembly is needed, so the hub or the motor is not convenient to disassemble, and the maintenance efficiency is low.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical defects, the utility model aims to provide the hub motor of the electric vehicle, the output shaft of the motor is arranged into two sections, the two sections of shafts of the motor are fixed by the connection of the end covers, the motor and the hub can be detached only by detaching the end covers, and the efficiency is improved.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides an electric vehicle hub motor, which comprises a hub, a motor main body and two end covers for connecting the motor main body and the hub, wherein driving shafts are arranged at two ends of the motor main body, a fixing shaft which is coaxial with the driving shaft and is fixed on a vehicle body is arranged at the end part of the driving shaft, a connecting part is arranged between the fixing shaft and the driving shaft, and the connecting part limits the fixing shaft and the driving shaft to the axial direction and the radial direction under the action of the end covers.

Preferably, the connecting part comprises a connecting piece, the connecting piece is formed by coaxially connecting a conical ring and a circular ring, the end part of the fixed shaft is connected with a limiting ring, the limiting ring is positioned in the circular ring of the connecting piece and is limited by the connecting piece, limiting blocks are uniformly distributed on the circumference of the outer surface of the fixed shaft and the driving shaft, and limiting grooves matched with the limiting blocks are formed in two ends of the inner surface of the connecting piece.

Preferably, the edge of the limiting block or the limiting groove is provided with a chamfered surface for pre-guiding.

Preferably, a tapered roller bearing is arranged between the end cover and the connecting piece, and the inner diameter surface of the end cover is connected with the fixed shaft through the bearing.

Preferably, a sealing plate for limiting the position of the bearing is connected to one side of the end cover.

Preferably, the limiting grooves at the two ends of the connecting piece are distributed in a staggered mode.

The utility model has the beneficial effects that: the output end of the motor is further provided with a fixed shaft, the fixed shaft is connected with the vehicle body of the electric vehicle, when the end cover of the driving shaft of the motor is connected with the motor and the wheel hub, the two shafts are fixedly connected through the connecting part, so that the motor can be rapidly detached and installed, the steps are simplified, and the maintenance efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electric vehicle hub motor provided by an embodiment of the utility model.

Fig. 2 is a schematic view of a half-section structure of the hub.

Fig. 3 is an enlarged view of the part a in fig. 2.

Fig. 4 is a schematic diagram of half-section of the end cover and structural disassembly of the connecting part.

Fig. 5 is a schematic structural view of the connector.

Description of reference numerals: 1-hub, 2-motor body, 3-end cover, 4-driving shaft, 5-fixed shaft, 6-connecting part, 7-tapered roller bearing, 8-sealing plate, 601-connecting part, 603-limiting ring, 604-limiting block and 605-limiting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): as shown in fig. 1-5, the utility model provides an electric vehicle hub motor, which comprises a hub 1, a motor body 2 and two end covers 3 for connecting the motor body 2 and the hub 1, wherein the end covers 3, the motor body 2 and the hub are all provided with mounting holes and are mounted through bolts, the holes in the motor body 2 are not shown, two ends of the motor body 2 are respectively provided with a driving shaft 4, the end part of the driving shaft 4 is provided with a fixed shaft 5 which is coaxially fixed on a vehicle body, a connecting part 6 is arranged between the fixed shaft 5 and the driving shaft 4, the connecting part 6 limits the axial direction and the radial direction of the fixed shaft 5 and the driving shaft 4 under the action of the end covers 3, and the position of the connecting part 6 can be limited when the end covers 3 are mounted. The two end covers 3 completely restrict the positions of the motor main body 2 and the connecting portion 6, thereby fixing the shaft to the vehicle body.

Further, the connecting portion 6 includes a connecting member 601, the connecting member 601 is formed by coaxially connecting a conical ring and a circular ring, the end of the fixing shaft 5 is connected with a limiting ring 603, the limiting ring 603 is used for limiting the axial movement of the fixing shaft 6 and is matched with the driving shaft 4 to enable the fixing position to be completely fixed, the limiting ring 603 is located in the circular ring of the connecting member 601 and is limited with the connecting member 601, namely, the minimum inner diameter of the conical ring of the connecting member 601 is smaller than the maximum outer diameter of the limiting ring 603, the fixing shaft 5 and the driving shaft 4 are uniformly distributed with limiting blocks 604 on the outer surface circumference, two ends of the inner surface of the connecting member 601 are respectively provided with a limiting groove 605 matched with the limiting blocks, the matching of the limiting blocks 604 and the limiting grooves 605 is used for keeping the driving shaft 4 fixed and cannot rotate, and therefore the motor body 2 rotates to drive the hub 1.

Furthermore, the limiting grooves 605 at the two ends of the connecting piece 601 are distributed in a staggered manner, and the two limiting grooves are not located on the same axial straight line due to the staggered distribution, so that the influence on strength due to the fact that the local thickness is weak is avoided.

Furthermore, the edge of the limiting block 604 or the limiting groove 605 is provided with a chamfered surface for guiding in advance, and the chamfered surface is an inclined surface or an arc surface, because when the driving shaft 4 is installed, the driving shaft 4 is located inside, the limiting block 604 on the driving shaft 4 is difficult to align with the limiting groove 605, and the chamfered surface is arranged for guiding, so that the driving shaft is more convenient to install.

Further, a tapered roller bearing 7 is arranged between the end cover 3 and the connecting piece 601, and the inner diameter surface of the end cover 3 is connected with the fixed shaft 5 through a bearing, because the end cover 3 needs to have a certain pressure on the connecting piece 7, the two can slide relatively, the abrasion needs to be reduced through the bearing, and because the two are in axial contact friction, the tapered roller bearing 7 can be arranged to reduce the friction when the motor main body 2 works.

Furthermore, one side of the end cover 3 is connected with a sealing plate 8 used for limiting the position of the bearing, the sealing plate 8 is arranged to facilitate the installation of the bearing, and the disassembly is also more convenient.

During maintenance, bolts or screws between the hub 1 and the end cover 3 and between the motor body 2 and the end cover 3 are directly disassembled, then the end cover 3 moves along the axial direction, a space is reserved between the end cover 3 and the hub 1 after the end cover 3 moves, the connecting piece 7 moves towards one end of the fixed shaft 5 along the axial direction directly or through a tool, under the condition that the connecting piece 601 does not exist, the driving shaft 4 and the fixed shaft 5 are not limited in the radial direction, the motor body 2 and the hub can be directly taken down, and sequential operation is required during installation.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides an electric motor car wheel hub motor, its characterized in that includes wheel hub (1), motor body (2) and two end cover (3) of connecting motor body (2) and wheel hub (1), the both ends of motor body (2) all are equipped with drive shaft (4), the tip of drive shaft (4) is equipped with rather than coaxial fixed axle (5) of being fixed in on the automobile body, be equipped with connecting portion (6) between fixed axle (5) and drive shaft (4), connecting portion (6) make connecting portion (6) spacing to fixed axle (5) and drive shaft (4) axial and radial under the effect of end cover (3).

2. The hub motor of the electric vehicle as claimed in claim 1, wherein the connecting part (6) comprises a connecting member (601), the connecting member (601) is formed by coaxially connecting a conical ring and a circular ring, the end of the fixed shaft (5) is connected with a limiting ring (603), the limiting ring (603) is positioned in the circular ring of the connecting member (601) and is limited by the connecting member (601), the fixed shaft (5) and the driving shaft (4) are uniformly distributed with limiting blocks (604) on the outer surface circumference, and both ends of the inner surface of the connecting member (601) are provided with limiting grooves (605) matched with the inner surface of the connecting member.

3. The hub motor of the electric vehicle as claimed in claim 2, wherein the edge of the stopper (604) or the stopper groove (605) is provided with a chamfered surface for pre-guiding.

4. An in-wheel motor of an electric vehicle as claimed in claim 2, characterized in that a tapered roller bearing (7) is arranged between the end cover (3) and the connecting piece (601), and the inner diameter surface of the end cover (3) is connected with the fixed shaft (5) through a bearing.

5. An in-wheel motor for electric vehicles, as claimed in claim 4, characterized in that a closing plate (8) for limiting the position of the bearing is attached to one side of the end cap (3).

6. The hub motor of the electric vehicle as claimed in claim 2, wherein the limiting grooves (605) at the two ends of the connecting member (601) are distributed in a staggered manner.