CN110739786A

CN110739786A - hub motor rotor structure

Info

Publication number: CN110739786A
Application number: CN201810801630.7A
Authority: CN
Inventors: 李蓉; 崔龙; 史文波; 李伟业; 胡勇峰; 李华湘; 史俊旭; 胡华; 谭畅; 卢小龙
Original assignee: CRRC Zhuzhou Institute Co Ltd
Current assignee: CRRC Zhuzhou Institute Co Ltd
Priority date: 2018-07-20
Filing date: 2018-07-20
Publication date: 2020-01-31

Abstract

The invention provides in-wheel motor rotor structures, which comprise a rotor shell, a plurality of permanent magnets and permanent magnet mounting assemblies, wherein the permanent magnets are fixedly mounted on the inner side wall of the rotor shell through the permanent magnet mounting assemblies, and the permanent magnets are uniformly distributed along the circumferential direction of the rotor shell.

Description

hub motor rotor structure

Technical Field

The invention relates to the field of motor equipment, in particular to an hub motor rotor structure.

Background

The hub motor is directly arranged in the hub, a large number of transmission parts can be omitted by directly driving the wheel, and the vehicle structure is simple. However, the hub motor increases the unsprung mass and the rotational inertia of the hub, which affects the operation of the vehicle. Therefore, weight control of the hub motor is particularly important,

the rotor structure of the existing hub motor is an outer rotor structure, the outer rotor directly drives a rim to rotate, and a stator is arranged inside the motor. The rotor structure of the hub motor usually comprises an inner rotor core and an outer shell, magnetic steel groove type machining is easy, the radial size of the rotor is large due to the combination mode of the rotor core and the shell, weight reduction of the motor is not facilitated, torque is transmitted between the rotor core and the shell through interference magnitude and key groove matching, and failure of the motor is easily caused.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and provides hub motor rotor structures which are small in radial size of the rotor, light in motor gravity and high in reliability of motor rotor transmission torque.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

kinds of in-wheel motor rotor structure, including rotor case, a plurality of permanent magnet and permanent magnet installation component, the permanent magnet pass through permanent magnet installation component fixed mounting in on rotor case's the inside wall, it is a plurality of the permanent magnet is followed rotor case's circumference is evenly arranged.

improvement of the technical proposal:

the permanent magnet installation component comprises a plurality of mounting grooves arranged along the inner side wall of the rotor shell, the number of the mounting grooves is the same as that of the permanent magnets, and are correspondingly arranged.

The inner surface of the mounting groove is matched with the outer surface of the permanent magnet.

The mounting groove is formed by inserting an slotting machine or milling by a milling machine.

The permanent magnet is adhered in the mounting groove.

The permanent magnet installation component comprises a plurality of limiting blocks and limiting block installation parts, the two ends of the permanent magnet are abutted to the inner side wall of the rotor shell through the limiting blocks, and the limiting block installation parts are arranged corresponding to the limiting blocks.

The two ends of the limiting block are provided with limiting bosses, the two ends of the permanent magnet are provided with limiting matching parts, and the permanent magnet is abutted to the rotor shell tightly through the limiting matching of the limiting matching parts and the limiting bosses.

The number of the limiting blocks is the same as that of the permanent magnets, and the limiting blocks and the permanent magnets are alternately arranged along the circumferential direction of the rotor shell.

The limiting block mounting part comprises a radial through hole and a connecting bolt, the radial through hole is formed in the rotor shell, and the connecting bolt penetrates through the radial through hole and is connected with the limiting block.

The permanent magnet is horizontally arranged along the axial direction of the rotor shell, and axial baffles are arranged at two ends of the permanent magnet.

Compared with the prior art, the invention has the advantages that:

the rotor structure of the hub motor provided by the invention has the advantages that the rotor core is omitted, and the rotor core is replaced by fixing the permanent magnet on the inner side wall of the rotor shell, so that the radial size of the rotor of the hub motor is effectively reduced, and the weight of the motor is reduced; meanwhile, the permanent magnet is fixedly arranged on the rotor shell through the permanent magnet mounting assembly, so that the reliability of torque transmission of the motor rotor is enhanced, and the permanent magnet mounting assembly is convenient to install and simple and compact in structure.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 is a schematic structural view of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

The reference numerals in the figures denote:

1. a rotor housing; 2. a permanent magnet; 21. a limit matching part; 3. a permanent magnet mounting assembly; 31. mounting grooves; 32. a limiting block; 321. a limiting boss; 33. a radial through hole; 34. a connecting bolt; 35. and (6) bonding glue.

Detailed Description

The invention will now be described in further detail with reference to the drawings and specific examples, but not to limit the scope of the invention.

Example 1

As shown in fig. 1, the rotor structure of the in-wheel motor of the present embodiment includes a rotor housing 1, a plurality of permanent magnets 2, and a permanent magnet mounting assembly 3. Wherein, permanent magnet 2 passes through permanent magnet installation component 3 fixed mounting on the inside wall of rotor housing 1, and a plurality of permanent magnets 2 are evenly arranged along rotor housing 1's circumference. The hub motor rotor structure provided by the invention has the advantages that the rotor core is omitted, the rotor core is replaced by fixing the permanent magnet 2 on the inner side wall of the rotor shell 1, the radial size of the hub motor rotor is effectively reduced, and the weight of the motor is reduced; meanwhile, the permanent magnet 2 is fixedly arranged on the rotor shell 1 through the permanent magnet mounting component 3, so that the reliability of torque transmission of the motor rotor is enhanced, and the motor rotor is convenient to install and simple and compact in structure.

In the embodiment, the permanent magnet installation component 3 comprises a plurality of installation grooves 31, the installation grooves 31 are arranged along the inner side wall of the rotor shell 1, the number of the installation grooves 31 is the same as that of the permanent magnets 2, and the permanent magnets 2 are correspondingly arranged in the installation grooves 31, so that the installation structure of the permanent magnets 2 is simple, and the installation grooves 31 are arranged at intervals to ensure that the partition performance of the permanent magnets 2 is good.

, the inner surface of the mounting groove 31 of the embodiment is adapted to the outer surface of the permanent magnet 2, which facilitates the effective connection of the permanent magnet 2. meanwhile, the mounting groove 31 is the mounting groove 31 inserted by a slotting machine or milled by a milling machine, and the permanent magnet 2 is adhered to the mounting groove 31 by the adhesive 35, so that the connection strength and reliability of the permanent magnet 2 are high, and the installation is convenient.

And , the permanent magnet 2 is horizontally arranged along the axial direction of the rotor shell 1, and axial baffles are arranged at two ends of the permanent magnet 2. the arrangement of the axial baffles effectively prevents the permanent magnet 2 from axially moving and ensures the effective operation of the hub motor.

In this embodiment, the rotor housing 1 is a cylindrical housing, and the mounting groove 31 is machined by inserting or milling with an slotting machine, which is convenient to machine.

Example 2

Fig. 2 shows another in-wheel motor rotor structure embodiment of the present invention, which is basically the same as the previous embodiment , except that the permanent magnet mounting assembly 3 of the present embodiment includes a plurality of limiting blocks 32 and limiting block mounting parts, wherein two ends of the permanent magnet 2 are abutted to the inner side wall of the rotor housing 1 through the limiting blocks 32, and the limiting block mounting parts are disposed corresponding to the limiting blocks 32 to fix the positions of the limiting blocks 32.

, limiting bosses 321 are arranged at two ends of each limiting block 32, and limiting matching parts 21 are arranged at two ends of each permanent magnet 2. the permanent magnets 2 are embedded between the two limiting blocks 32 along the axial direction of the hub motor, and the limiting matching parts 21 of the permanent magnets 2 are in limiting matching with the limiting bosses 321 of the limiting blocks 32 to play a role in radially fixing the permanent magnets 2, and at the moment, the permanent magnets 2 are tightly abutted against the inner side wall of the rotor shell 1.

As shown in fig. 2, the permanent magnets 2 and the limit blocks 32 of this embodiment are all set to four, and the limit blocks 32 and the permanent magnets 2 are alternately arranged along the circumferential direction of the rotor housing 1, so that the layout is compact. In other embodiments, the number of the limit blocks 32 and the number of the permanent magnets 2 may be set according to actual conditions.

In this embodiment, the stopper mounting part includes a radial through hole 33 and a connecting bolt 34. Wherein, the radial through hole 33 is arranged on the rotor shell 1; the connecting bolt 34 passes through the radial through hole 33 to be connected with the stopper 32 to fix the position of the stopper 32. The arrangement of the radial through holes 33 and the connecting bolts 34 enables the limiting blocks 32 to be convenient to mount and dismount, high in connection reliability, compact in layout and free of occupying extra space.

, a threaded hole is formed in the limiting block 32, and the threaded hole is in threaded fit with the connecting bolt 34.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

The utility model provides an in-wheel motor rotor structure of , its characterized in that, including rotor housing, a plurality of permanent magnet and permanent magnet installation component, the permanent magnet pass through permanent magnet installation component fixed mounting in on rotor housing's the inside wall, it is a plurality of the permanent magnet is followed rotor housing's circumference is evenly arranged.
2. The in-wheel motor rotor structure of claim 1, wherein the permanent magnet mounting assembly comprises a plurality of mounting grooves arranged along the inner side wall of the rotor shell, the number of the mounting grooves is the same as that of the permanent magnets, and are correspondingly arranged.
3. The in-wheel motor rotor structure of claim 2, wherein the inner surface of the mounting groove is adapted to the outer surface of the permanent magnet.
4. The in-wheel motor rotor structure of claim 3, wherein the mounting groove is a mounting groove inserted by an slotting machine or milled by a milling machine.
5. The in-wheel motor rotor structure of claim 4, wherein the permanent magnet is bonded in the mounting groove.
6. The in-wheel motor rotor structure of any of claims 1-5, wherein the permanent magnet mounting assembly includes a plurality of limiting blocks and limiting block mounting parts, two ends of the permanent magnet are abutted against the inner side wall of the rotor housing through the limiting blocks, and the limiting block mounting parts are disposed corresponding to the limiting blocks.
7. The in-wheel motor rotor structure of claim 6, wherein the two ends of the limiting block are provided with limiting bosses, the two ends of the permanent magnet are provided with limiting matching parts, and the permanent magnet abuts against the rotor shell through the limiting matching of the limiting matching parts and the limiting bosses.
8. The in-wheel motor rotor structure of claim 7, wherein the number of the limiting blocks is the same as that of the permanent magnets, and the limiting blocks and the permanent magnets are alternately arranged along the circumferential direction of the rotor shell.
9. The in-wheel motor rotor structure of claim 6, wherein the limiting block mounting part comprises a radial through hole and a connecting bolt, the radial through hole is formed in the rotor shell, and the connecting bolt penetrates through the radial through hole to be connected with the limiting block.
10. The in-wheel motor rotor structure of any of claims 1-5, wherein the permanent magnets are horizontally arranged along the axial direction of the rotor shell, and both ends of the permanent magnets are provided with axial baffles.