CN111262371A

CN111262371A - Wheel hub for electric vehicle motor

Info

Publication number: CN111262371A
Application number: CN201811457731.3A
Authority: CN
Inventors: 付开强; 杨云峰; 陆肃中; 蒲道勇; 钟治平
Original assignee: Wenling Jiuzhou Electromechanical Co ltd
Current assignee: Wenling Jiuzhou Electromechanical Co ltd
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2020-06-09

Abstract

The invention relates to the field of electric vehicle motors, in particular to a hub for an electric vehicle motor, which comprises a rim and an integrated end cover, wherein the integrated end cover comprises a magnetic conduction ring body and an end cover body which are integrated into a whole, the inner wall of the rim is connected with the outer peripheral surface of the magnetic conduction ring body in a welding mode, the hub is characterized in that the integrated end cover comprises the end cover body and an annular magnetic conduction ring body which axially and integrally extends from the outer edge of the end cover body, and the thickness t of the magnetic conduction ring body is₁Thickness t of rim₂The ratio of the ratio is 1.2 to 3.22. The hub for the electric vehicle motor is directly formed by adopting a stamping or stretching mode, the internal crystal grain structure is more uniform after cold machining deformation, the strength is improved compared with the original strength, compared with the existing hub of an integrated wheel formed by casting, the hub not only can meet the requirement on strength, but also greatly saves energy, saves the process of melting and resolidifying raw materials, and greatly shortens the production period,the production efficiency is improved.

Description

Wheel hub for electric vehicle motor

Technical Field

The invention relates to the field of electric vehicle motors, in particular to a hub for an electric vehicle motor.

Background

The wheel hub for the electric vehicle motor is one of main components of the electric vehicle motor, and is a device capable of integrating the motor and a tire into a whole.

The structure of the existing integrated wheel hub is shown in fig. 1, the rim portion 11, the magnetic conductive ring 13 and the end cover portion 12 are integrated into a whole by the integrated wheel hub, the integrated wheel hub is usually formed by a casting process, and then a final finished product is formed by turning, and the process needs to consume a large amount of energy to heat and melt raw materials, so that the casting forming is performed, the processing period is long, the cost is high, and the improvement of the production efficiency is not facilitated.

In view of the above problems, a novel hub for an electric vehicle motor is developed, the hub not only meets the strength requirement, but also has short production process period and low production cost, and is a problem that needs to be solved urgently by technical personnel in the field at present.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention discloses a hub for an electric vehicle motor, which can shorten the production period and greatly reduce the manufacturing cost of the original integral wheel hub, thereby improving the overall production efficiency of the motor and reducing the production cost.

The utility model provides a wheel hub for electric motor car motor, wheel hub is 10 cun wheel hub or is less than 10 cun wheel hub, including rim and integrative end cover, magnetic ring body and end cover body as an organic whole of integrative end cover, the inner wall of rim passes through the welding mode and is connected with the outer peripheral face of magnetic ring body, a serial communication port, integrative end cover is annular magnetic ring body for the end cover body with be extended from the outside edge of end cover body axial an organic whole, magnetic ring body thickness t₁Thickness t of rim₂The ratio of the ratio is 1.2 to 3.22.

The wheel rim is further characterized in that a flange is arranged on the outer edge of the wheel rim, and the flange is an inner flange.

The stator is further characterized in that a cavity is formed in the annular magnetic conduction ring body and used for accommodating the stator core.

The magnetic ring is characterized in that the inner wall of the magnetic ring body is used for mounting a permanent magnet, and the thickness t of the permanent magnet₃Thickness t of magnetic conductive ring body₁The ratio of the ratio is 0.31 to 0.9.

The magnetic conduction ring is further characterized in that the outer edges of the opposite sides of the magnetic conduction ring body and the end cover body are turned out from inside to outside to form an annular spigot end face.

The socket is further characterized in that a plurality of ears are arranged on the end face of the spigot, and bulges for tapping to form threaded holes are arranged on the ears.

The end cover is further characterized in that the middle part of the end cover body forms a bearing chamber by an n-shaped bulge ring towards the direction section of the cavity.

Further characterized in that the ratio of the inner diameter D of the bearing chamber to the inner diameter D of the magnetic ring body is 0.1-0.52.

The magnetic ring is characterized in that the magnetic ring body and the end cover body are transited into an arc section, and the ratio of the radius of the arc section to the inner diameter D of the magnetic ring body is 0.005-0.2.

The integrated end cover is further characterized in that the wall thickness of the integrated end cover is 2.5-4.5 mm.

Compared with the prior art, the technical scheme shows that the hub for the electric vehicle motor is directly molded by adopting a stamping or stretching mode, the internal crystal grain structure is more uniform after cold machining deformation, the strength is improved compared with the original strength, compared with the existing hub for the integrated wheel molded by casting, the hub for the electric vehicle motor has the advantages that the strength can meet the requirement, the energy is greatly saved, the process of melting and re-solidifying raw materials is omitted, the production period is greatly shortened, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of an integrally cast wheel hub for an electric vehicle motor

FIG. 2 is a schematic structural view of a hub for an electric vehicle motor according to the present invention

FIG. 3 is a schematic diagram of the dimension code of the present invention

FIG. 4 is a schematic structural view of an integrated end cap according to the present invention

FIG. 5 is another angle view of the integrated end cap of the present invention

FIG. 6 is a schematic view of a rim structure of a hub for an electric vehicle motor according to the present invention

In the drawings, 1, a wheel hub; 11. a rim portion; 12. an end cap portion; 13. a magnetic conductive ring; 2. a rim; 21. an inner wall; 22. flanging; 3. an integral end cap; 31. a bearing chamber; 32. a spigot end face; 33. an ear; 34. a protrusion; 35. a threaded hole; 36. a magnetic conductive ring body; 37. an end cap body; 38. a circular arc section; 39. a raised ring with an n-shaped section; 4. and a permanent magnet.

Detailed Description

The invention will be further explained with reference to the following embodiments and the accompanying drawings:

example 1:

as shown in fig. 2 to 5, a wheel hub for an electric vehicle motor, the wheel hub is less than or equal to 10 inches, and includes a rim 2 and an integrated end cover 3, the integrated end cover 3 is an integrated magnetic conduction ring body 36 and an end cover body 37, an inner wall 21 of the rim 2 is connected with an outer peripheral surface of the magnetic conduction ring body 36 through a welding manner, and the wheel hub is characterized in that the integrated end cover is composed of the end cover body 37 and an annular magnetic conduction ring body 36 axially and integrally extending from an outer edge of the end cover body, and a ratio of a thickness of the magnetic conduction ring body 36 to a thickness of the rim is 1.78 to 3.22.

The outer edge of the rim is provided with a flange which is an inner flange 22, namely, the direction of the flanges on the two sides of the rim is provided with a tire side. The rim flange can not be seen after the tire is installed, the appearance is attractive, and the possible abrasion to the tire is small.

The integral end cap is provided with a stretched cavity therein for receiving a stator core (not shown).

The inner wall of the magnetic conduction ring body is used for mounting a permanent magnet 4 in an annular mode to form a magnetic conduction ring and form an outer rotor, and the permanent magnetThickness t of body₃Thickness t of magnetic conductive ring body₁The ratio of the flux leakage to the flux leakage is 0.31-0.9, the flux leakage is less, the utilization rate of the permanent magnet is high, the cost of the magnetic conduction ring is most reasonably controlled, and the magnetic conduction ring has an obvious effect on small-sized hubs.

The outer edge of the opposite side of the magnetic conduction ring body and the end cover body is turned out from inside to outside to form an annular spigot end face 32.

Be equipped with a plurality of ear 33 on the tang terminal surface, be provided with the arch that supplies the tapping to form screw hole 35 on the ear, the arch can still effectively guarantee at joint strength under the limited condition of wall thickness.

The section n-shaped raised ring 38 towards the cavity in the middle of the end cover body forms a bearing chamber 31, and the section n-shaped raised ring 38 not only can effectively increase the strength and rigidity of the bearing chamber, but also can prevent the bearing chamber from deforming under the external impact load, and can effectively absorb the impact force, thereby effectively protecting the bearing.

The ratio of the inner diameter of the bearing chamber to the inner diameter of the magnetic conduction ring body is 0.12-0.52, and the service life of the bearing is longest.

The magnetic conduction ring body and the end cover body are transited into the arc section, the ratio of the radius of the arc section to the inner diameter D of the magnetic conduction ring body is 0.005-0.2, so that the magnetic conduction ring is well realized in the process, the cost is lowest, the strength can be ensured, and the magnetic conduction ring has obvious special effect on a small-size hub with the hub being a 10-inch hub (the nominal diameter code of a rim on the national standard) or less than a 10-inch hub.

The wall thickness of the integrated end cover is 2.5-4.5 mm.

Claims

1. The utility model provides a wheel hub for electric motor car motor, wheel hub is 10 cun wheel hub or is less than 10 cun wheel hub, including rim and integrative end cover, magnetic ring body and end cover body as an organic whole of integrative end cover, the inner wall of rim passes through the welding mode and is connected with the outer peripheral face of magnetic ring body, a serial communication port, integrative end cover is annular magnetic ring body for the end cover body with be extended from the outside edge of end cover body axial an organic whole, magnetic ring body thickness t₁Thickness t of rim₂The ratio of the ratio is 1.2 to 3.22.

2. The hub for an electric vehicle motor of claim 1, wherein the rim is provided with a flange at an outer edge thereof.

3. The hub for the electric vehicle motor of claim 2, wherein the annular magnetic conductive ring body forms a cavity therein for accommodating the stator core, and the flange is an inward flange.

4. The hub for electric vehicle motor of claim 1, wherein the inner wall of said magnetic conductive ring body is used for mounting permanent magnet, said permanent magnet has thickness t₃Thickness t of magnetic conductive ring body₁The ratio of the ratio is 0.31 to 0.9.

5. The hub for the electric vehicle motor as recited in claim 1, wherein the outer edge of the magnetic conductive ring body opposite to the end cover body is turned out from inside to outside to form an annular spigot end face.

6. A hub for an electric vehicle motor as defined in claim 5, wherein said spigot end surface has a plurality of ears, said ears having protrusions for tapping to form threaded holes.

7. A hub for an electric vehicle motor according to claim 1, wherein the bearing chamber is formed by an n-shaped projection ring in a section from the middle of the end cover body toward the cavity.

8. The hub for an electric vehicle motor of claim 7, wherein the ratio of the bearing chamber inner diameter D to the magnetic conductive ring body inner diameter D is 0.1 to 0.52.

9. The hub for the electric vehicle motor according to any one of claims 1 to 7, wherein the magnetic conductive ring body and the end cap body are transited into a circular arc section, and the ratio of the radius of the circular arc section to the inner diameter D of the magnetic conductive ring body is 0.005 to 0.2.

10. The hub for an electric vehicle motor of claim 9, wherein the wall thickness of the integral end cap is 2.5-4.5 mm.