CN217087601U

CN217087601U - Rotor of in-wheel motor

Info

Publication number: CN217087601U
Application number: CN202123198877.0U
Authority: CN
Inventors: 陶开江
Original assignee: Changyingxinzhi Technology Co ltd
Current assignee: Xinzhi Group Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-07-29
Anticipated expiration: 2031-12-17

Abstract

The utility model belongs to the technical field of hub motors, in particular to a rotor of a hub motor, which comprises a rim; the middle part of the rim is provided with a tire limiting groove for mounting a tire, and the tire limiting groove comprises a shallow groove section and a deep groove section; the outer side surface of the deep groove section of the tire limiting groove is welded with a plurality of connecting pieces, and the connecting pieces extend outwards and are arranged along the circumferential direction of the rim; the metal ring is arranged in the rim, and the metal ring and the inner wall of the rim are welded into a whole. Thereby with the connecting piece welding in the lateral surface of the deep troughed section of child spacing groove, make the end cover connect on the rim, break away from the relation of connection with the metal loop, and then the producer can be thinner with the metal loop design, make the motor can have bigger power, do not influence the installation of end cover and the joint strength of end cover when connecting on the rim.

Description

Rotor of in-wheel motor

Technical Field

The utility model relates to a wheel hub motor technical field refers in particular to a wheel hub motor's rotor.

Background

The power of the existing hub motor is generally related to the number of the magnetic steel sheets, and the larger the number of the magnetic steel sheets is, the larger the generated power of the motor is, and the smaller the generated power of the motor is. Therefore, the thickness of the metal ring for mounting the magnetic steel sheets becomes an important factor influencing the number of the magnetic steel sheets. The diameter of the hub is basically the same specification, the thinner the metal ring is, the larger the diameter of the inner wall of the metal ring for mounting the magnetic steel sheets is, and the longer the circumference is, so that more magnetic steel sheets can be mounted, and the effect of improving the power of the motor is achieved.

However, the end caps of the conventional hub motor are generally connected to the end faces of the metal rings, such as the outer rotor of the hub motor of the electric vehicle provided with the spacer of chinese patent application No. 202011314369.1, which has the disadvantage that if the metal rings are too thin, it may not be possible to open holes or weld connecting pieces for connecting the end caps.

Disclosure of Invention

The utility model aims at providing a rotor of in-wheel motor.

The purpose of the utility model is realized like this:

a rotor of an in-wheel motor includes a rim; a tire limiting groove for mounting a tire is arranged in the middle of the rim,

the tire limiting groove comprises a shallow groove section and a deep groove section;

the outer side surface of the deep groove section of the tire limiting groove is welded with a plurality of connecting pieces, and the connecting pieces extend outwards and are arranged along the circumferential direction of the rim;

the metal ring is arranged in the rim, and the metal ring and the inner wall of the rim are welded into a whole.

Preferably, the included angle a between the outer side surface of the deep groove section and the groove bottom is 85-90 degrees.

Preferably, the included angle a between the outer side surface of the deep groove section and the groove bottom is 90 degrees.

Preferably, the width of the metal ring is larger than that of the groove bottom; the corners of the groove bottom and the groove wall of the deep groove section are welded with the outer side wall of the metal ring into a whole.

Preferably, the end face of the metal ring is flush with the outer side face of the deep groove section.

Preferably, the connecting piece is horizontally arranged, and the end part of the connecting piece is provided with an external thread or an internal thread hole.

Preferably, the thickness d of the metal ring is 1mm-3.5 mm.

The thickness d of the metal ring is 1mm-2 mm.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. the utility model discloses a with the lateral surface of connecting piece welding at the deep trouth section of child spacing groove, make the end cover connect on the rim, break away from with the relation of connection of metal loop, and then the producer can be thinner with the metal loop design ground, make the motor can have bigger power, do not influence the installation of end cover and the joint strength of end cover when connecting on the rim.

Drawings

Fig. 1 is a schematic view of the entire structure of embodiment 1.

FIG. 2 is a plan view of example 1.

FIG. 3 is a partial sectional view of example 1.

FIG. 4 is a partial sectional view of example 2.

Reference numerals: 1. a rim; 2. a tire limit groove; 3. a shallow groove section; 4. a deep groove section; 5. a connecting member; 6. and (4) a metal ring.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

Example 1:

as shown in fig. 1 to 3, a rotor of an in-wheel motor includes a rim 1; a tire limiting groove 2 for mounting a tire is arranged in the middle of the rim 1, and the tire limiting groove 2 comprises a shallow groove section 3 and a deep groove section 4. The tyre is arranged in the shallow groove section 3 and is limited and fixed by the inner wall of the shallow groove section 3. The inner wall of the deep groove section 4 cooperates with the tyre for creating a vacuum in order to support the tyre. A plurality of connecting pieces 5 are welded on the outer side face of a deep groove section 4 of the tire limiting groove 2, and the connecting pieces 5 extend outwards and are arranged along the circumferential direction of the rim 1. The end caps on both sides of the hub motor can thus be mounted on the rim 1 via the connecting elements 5. The wheel rim is characterized in that a metal ring 6 for mounting the magnetic steel sheet is arranged inside the wheel rim 1, and the metal ring 6 and the inner wall of the wheel rim 1 are welded into a whole.

The power of the existing hub motor is generally related to the number of the magnetic steel sheets, and the more the number of the magnetic steel sheets is, the larger the generated power of the motor is, and the smaller the generated power of the motor is. Therefore, the thickness of the metal ring for mounting the magnetic steel sheets becomes an important factor influencing the number of the magnetic steel sheets. The diameter of the hub is basically the same specification, the thinner the metal ring is, the larger the diameter of the inner wall of the metal ring for mounting the magnetic steel sheets is, and the longer the circumference is, so that more magnetic steel sheets can be mounted, and the effect of improving the power of the motor is achieved. However, the end caps of a typical hub motor are generally connected to the end faces of the metal rings, and if the metal rings are too thin, it may not be possible to open holes or weld connectors to connect the end caps.

Thereby this application makes the end cover connect on rim 1 through the lateral surface with 5 welding of connecting piece in the deep trouth section 4 of child spacing groove, breaks away from the relation of being connected with ferrule 6, and then the producer can be thinner with ferrule 6 design ground, makes the motor can have bigger power, does not influence the installation of end cover and the joint strength of end cover when connecting on rim 1.

As shown in fig. 3, the connection member 5 is horizontally disposed so that the welding process of the connection member 5 and the installation of the end cap are facilitated. The end of the connecting piece 5 is provided with an external thread or an internal thread hole, so that the rim 1 can be mounted on the end cover through a bolt or a nut.

Further, as shown in fig. 3, in the present embodiment, an included angle a between the outer side surface of the deep groove section 4 and the groove bottom is preferably 85 to 90 degrees, and further may be preferably 90 degrees. So as to achieve a horizontal arrangement of the connecting pieces 5 of the outer side of the deep groove section 4.

As shown in fig. 3, the width of the metal ring 6 is larger than that of the groove bottom, so that a large-sized magnetic steel sheet can be installed to provide larger power. The corners of the groove bottom and the groove wall of the deep groove section 4 and the outer side wall of the metal ring 6 are welded into a whole, so that the connection strength between the metal ring 6 and the rim 1 is improved.

The thickness of steel adopted by the rim 1 is generally 1.5-1.7mm, and when the magnetic steel sheets are directly installed on the inner wall of the rim 1, the magnetic force of the magnetic steel sheets can penetrate through the rim 1 to generate magnetic force action on the outer side area of the rim 1, so that the magnetic leakage phenomenon is generated. Therefore, when the magnetic leakage phenomenon is found to be possible, the metal ring 6 can also be used as a leakage-proof ring to prevent the magnetic leakage phenomenon.

The thickness d of the metal ring 6 is preferably 1mm-3.5mm, and further preferably 1mm-2mm, and the metal ring 6 with the thickness can effectively prevent the magnetic flux leakage phenomenon while installing more magnetic steel sheets.

Example 2:

as shown in fig. 4, this embodiment is substantially the same as embodiment 1, except that the end surface of the metal ring 6 is flush with the outer side surface of the deep groove section 4, and the magnetic leakage preventing effect is the best.

Simultaneously, the screw thread of connecting piece 5 also can extend to the lateral surface of deep trouth section 4 to also can laminate more with rim 1 when the end cover sets up on connecting piece 5, connect inseparabler, corresponding also can reduce whole wheel hub's volume.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A rotor of an in-wheel motor, comprising a rim (1); the middle part of the rim (1) is provided with a tire limiting groove (2) for mounting a tire, and is characterized in that,

the tire limiting groove (2) comprises a shallow groove section (3) and a deep groove section (4);

a plurality of connecting pieces (5) are welded on the outer side surface of the deep groove section (4) of the tire limiting groove (2), and the connecting pieces (5) extend outwards and are arranged along the circumferential direction of the rim (1);

a metal ring (6) is arranged inside the rim (1), and the metal ring (6) and the inner wall of the rim (1) are welded into a whole.

2. A rotor of an in-wheel motor according to claim 1, wherein: and an included angle a between the outer side surface of the deep groove section (4) and the groove bottom is 85-90 degrees.

3. A rotor of an in-wheel motor according to claim 2, wherein: and an included angle a between the outer side surface of the deep groove section (4) and the groove bottom is 90 degrees.

4. A rotor of an in-wheel motor according to any one of claims 1 to 3, wherein: the width of the metal ring (6) is greater than that of the groove bottom; the corners of the groove bottom and the groove wall of the deep groove section (4) and the outer side wall of the metal ring (6) are welded into a whole.

5. A rotor of an in-wheel motor according to any one of claims 1 to 3, wherein: the end surface of the metal ring (6) is flush with the outer side surface of the deep groove section (4).

6. A rotor of an in-wheel motor according to claim 1, wherein: the connecting piece (5) is horizontally arranged, and an external thread or an internal thread hole is formed in the end part of the connecting piece (5).

7. A rotor of an in-wheel motor according to claim 1, wherein: the thickness d of the metal ring (6) is 1mm-3.5 mm.

8. A rotor of an in-wheel motor according to claim 7, wherein: the thickness d of the metal ring (6) is 1mm-2 mm.