CN210881521U - Wheel hub structure of electric motor car - Google Patents

Abstract

The utility model provides a wheel hub structure of an electric vehicle, which belongs to the technical field of wheel hub manufacturing. It solves the technical problems of the existing electric vehicle's wheel hub structure, such as heavy weight and complicated process. The hub structure includes an outer ring of the hub and a plurality of webs, the outer end of the web is fixedly connected with the inner wall of the outer ring of the hub, the inner end of the web extends along the radial direction of the outer ring of the hub to the middle of the outer ring of the hub, and the outer ring of the hub extends to the middle of the outer ring of the hub. The middle part of the brake housing is fixedly connected to the inner end of the web, the outer ring of the hub is made of iron material, the brake housing and the web are made of aluminum and the two are integrally cast; the outer end of the web is clamped with an iron block , the iron block is welded to the inner wall of the outer ring of the wheel hub. The wheel hub structure of the utility model greatly reduces the overall weight of the wheel hub structure while ensuring the bearing capacity; the brake shell and the web are integrally cast, which simplifies the production process and improves the aesthetics of the wheel hub.

Description

A wheel hub structure of an electric vehicle

technical field

The utility model belongs to the technical field of wheel hub manufacturing, and relates to a wheel hub structure of an electric vehicle.

Background technique

The electric hub structure is used in electric vehicles. The hub structure of electric vehicles usually combines the drive motor and tires together to form a whole to realize the driving of electric vehicles. It has the advantages of safety, stability and compact structure. The hub structure includes an outer ring of the hub and a web. The center of the web is provided with a brake housing (a sleeve in the middle), and the brake housing is used to install the brake shoes; the hub structure of the existing electric vehicle is usually made of iron as a whole. The web is welded and connected to the inner wall of the outer ring of the hub. Due to the characteristics of the iron material itself, the overall weight of the wheel hub is heavy. In addition, process steps such as web stamping and brake housing processing are required, which is complicated to manufacture and has poor aesthetics.

For example, a Chinese patent (announcement number: CN208052990U; announcement date: 2018-11-06) discloses a conjoined hub of an outer rotor hub motor, including a rim and a conjoined back iron end cover assembly; the conjoined back iron end cover assembly includes The back iron end and the end cap end; the back iron end and the end cap end form an integral structure, the middle and upper part of the back iron end is a hollow cylinder, and the edge of the back iron end extends outward to form a skirt; the middle position of the end cap end has a bearing mounting hole / seat; the edge position of the end cover end is "7"-shaped and fits with the middle and upper part of the back iron end; the skirt is annular or special-shaped; the bearing mounting hole is a bearing mounting hole extending inward or outward.

The conjoined wheel hub disclosed in the above-mentioned patent documents does not disclose the specific web structure and its connection method. In the conjoined wheel hub, the rim and the conjoined back iron end cover assembly are also welded, and the traditional iron material is relatively bulky as a whole. , the manufacturing process is more complicated.

SUMMARY OF THE INVENTION

Aiming at the above problems existing in the prior art, the present utility model provides a wheel hub structure of an electric vehicle. The technical problem to be solved by the present utility model is: how to reduce the weight of the wheel hub structure of an electric vehicle, simplify its manufacturing process steps, and improve the aesthetics. .

The purpose of this utility model can be realized by following technical scheme:

A wheel hub structure of an electric vehicle comprises an outer ring of the hub and a plurality of webs, the outer end of the web is fixedly connected with the inner wall of the outer ring of the hub, and the inner end of the web is along the radial direction of the outer ring of the hub It extends to the middle of the outer ring of the hub, and the middle of the outer ring of the hub is provided with a brake casing fixedly connected to the inner end of the web. It is characterized in that the outer ring of the hub is made of iron, and the brake casing is The web and the web are made of aluminum material and are integrally cast and formed; the outer end of the web is clamped with an iron block, and the iron block is connected to the inner wall of the outer ring of the wheel hub by welding.

The working principle is as follows: in this technical solution, the outer ring of the wheel hub is made of iron, and the brake shell and the web are made of aluminum. Since aluminum and iron cannot be directly welded, iron is embedded at the outer end of the web. The block is used for welding with the inner wall of the outer ring of the wheel hub, which solves the problem that aluminum and iron cannot be welded and connected. The technical solution greatly reduces the overall weight of the wheel hub structure while ensuring the bearing capacity; the brake shell and the web are integrally cast, which simplifies the production process and improves the aesthetics of the wheel hub.

In the above-mentioned wheel hub structure of the electric vehicle, a clamping groove is formed on the outer end face of the web, one side of the clamping groove is connected to the side surface of the web, and the iron block is embedded in the the outer side of the iron block is flush with the outer end face of the web, and the outer end face of the web and the outer side of the iron block are aligned with the inner wall of the outer ring of the hub. matching curved surfaces. In this way, the installation and welding of the iron block are convenient, the assembly is convenient, and the connection is stable.

In the above-mentioned wheel hub structure of an electric vehicle, the side surface of the engaging groove is an inclined surface, and a constriction is formed on the outer end face of the web plate, the iron block is in the shape of a rectangular plate, and the end of the iron block is in the shape of a rectangular plate. The end surface of the portion is an inclined surface matching with the side surface of the snap groove. The shape of the iron block matches the shape of the clamping groove. The iron block is inserted into the clamping groove from the side of the web, and the wedge-shaped structure is used to limit it to ensure the stability of its connection and its radial bearing capacity. . As an alternative, a T-slot and T-block structure can also be designed, and the design concept is substantially the same as this case.

In the above-mentioned wheel hub structure of an electric vehicle, the iron block is provided with a plurality of through holes penetrating the upper and lower side surfaces, and the iron block has a number of protrusions on the side surface.

In the above-mentioned wheel hub structure of an electric vehicle, the brake shell is cylindrical, the brake shell and the outer ring of the wheel hub are arranged coaxially, and the middle part of the brake shell also has a bearing seat arranged coaxially. A bearing is installed in the bearing seat to connect with the axle, and parts such as brake shoes are installed between the inner wall of the brake housing and the outer peripheral surface of the bearing seat for braking.

In the above-mentioned wheel hub structure of an electric vehicle, the two sides of the inner end of the web and the outer peripheral surface of the brake housing are smoothly transitioned by arc-shaped reinforcing ribs, and the two sides of the outer end of the web are connected to the hub. There is also a smooth transition between the inner walls of the outer ring through the arc-shaped reinforcing ribs. This can ensure the connection strength and improve the bearing capacity.

In the above-mentioned wheel hub structure of an electric vehicle, the number of the webs is 3 to 9, and all the webs are evenly distributed along the circumferential direction of the outer ring of the wheel hub. In this technical solution, it is preferably 5.

Compared with the prior art, the wheel hub structure in the utility model greatly reduces the overall weight of the wheel hub structure while ensuring the bearing capacity; the brake shell and the web are integrally cast, which simplifies the production process and improves the aesthetics of the wheel hub .

Description of drawings

FIG. 1 is a schematic three-dimensional structure diagram of the wheel hub structure.

FIG. 2 is a schematic cross-sectional structural diagram of the wheel hub structure.

FIG. 3 is a partial structural schematic diagram of the wheel hub structure.

In the figure, 1, the outer ring of the hub; 2, the web; 21, the snap groove; 3, the brake housing; 31, the bearing seat; 4, the iron block; 41, the through hole; 42, the bump; 5, the arc reinforcement tendons.

Detailed ways

The following are specific embodiments of the present utility model combined with the accompanying drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

As shown in Figure 1, Figure 2 and Figure 3, the hub structure in this embodiment includes a hub outer ring 1 and several webs 2, the outer ends of the webs 2 are fixedly connected to the inner wall of the hub outer ring 1, and the webs 2 The inner end of the hub outer ring 1 extends to the middle part of the hub outer ring 1 along the radial direction of the hub outer ring 1. The middle part of the hub outer ring 1 is provided with a brake housing 3 fixedly connected to the inner end of the web 2, and the hub outer ring 1 is made of iron material. The brake housing 3 and the web 2 are made of aluminum material and are integrally formed by casting; Specifically, a clamping groove 21 is formed on the outer end face of the web 2, one side of the clamping groove 21 is connected to the side of the web 2, and the iron block 4 is embedded in the clamping groove 21; The outer side is flush with the outer end face of the web 2, and the outer end face of the web 2 and the outer side of the iron block 4 are arc surfaces that match the inner wall of the hub outer ring 1; the side of the snap groove 21 is inclined and a constriction is formed on the outer end face of the web 2, the iron block 4 is in the shape of a rectangular plate, and the end face of the iron block 4 is an inclined plane that matches the side surface of the clamping slot 21; The shapes of the connecting grooves 21 are matched, and the iron blocks 4 are inserted into the engaging grooves 21 from the side of the web 2 .

In this embodiment, the wheel hub outer ring 1 is made of iron, and the brake housing 3 and the web 2 are made of aluminum. Since aluminum and iron cannot be directly welded, an iron block is embedded at the outer end of the web 2 4. It is used for welding with the inner wall of the outer ring 1 of the hub, which solves the problem that aluminum and iron cannot be welded and connected. This embodiment greatly reduces the overall weight of the wheel hub structure while ensuring the bearing capacity; the brake housing 3 and the web 2 are integrally formed by casting, which simplifies the production process and improves the aesthetics of the wheel hub.

As shown in FIGS. 1 and 3 , the brake housing 3 is cylindrical, the brake housing 3 is arranged coaxially with the wheel hub outer ring 1 , and the middle of the brake housing 3 also has a coaxially arranged bearing seat 31 ; Connected with the axle, brake shoes and other components are installed between the inner wall of the brake housing 3 and the outer peripheral surface of the bearing seat 31 for braking; between the two sides of the inner end of the web 2 and the outer peripheral surface of the brake housing 3, through the arc-shaped reinforcing ribs 5 For smooth transition, there is also a smooth transition between the two sides of the outer end of the web 2 and the inner wall of the outer ring 1 of the hub through the arc-shaped reinforcing ribs 5 . This can ensure the connection strength and improve the bearing capacity.

Further, as shown in FIG. 3 , the iron block 4 is provided with a plurality of through holes 41 penetrating the upper and lower side surfaces, and the side surface of the iron block 4 also has a number of protrusions 42 .

In this embodiment, the number of webs 2 is 3 to 9, and all webs 2 are evenly spaced along the circumferential direction of the hub outer ring 1. Preferably, the number of webs 2 in this embodiment is preferably 5.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Claims (7)

1. The hub structure of the electric vehicle comprises a hub outer ring (1) and a plurality of webs (2), wherein the outer ends of the webs (2) are fixedly connected with the inner wall of the hub outer ring (1), the inner ends of the webs (2) extend to the middle of the hub outer ring (1) along the radial direction of the hub outer ring (1), and the middle of the hub outer ring (1) is provided with a brake shell (3) fixedly connected with the inner ends of the webs (2), and the hub structure is characterized in that the hub outer ring (1) is made of an iron material, the brake shell (3) and the webs (2) are made of an aluminum material and are integrally cast and formed; the outer end of the amplitude plate (2) is clamped with an iron block (4), and the iron block (4) is connected with the inner wall of the hub outer ring (1) in a welding mode.

2. The hub structure of the electric vehicle as claimed in claim 1, wherein a clamping groove (21) is formed in the end face of the outer end of the web (2), one side of the clamping groove (21) is communicated to the side face of the web (2), and the iron block (4) is embedded in the clamping groove (21); the outer side face of the iron block (4) is flush with the outer end face of the web (2), the outer end face of the web (2) and the outer side face of the iron block (4) are arc faces matched with the inner wall of the hub outer ring (1).

3. The hub structure of the electric vehicle as claimed in claim 2, wherein the side surface of the clamping groove (21) is an inclined surface and a necking is formed on the end surface of the outer end of the web (2), the iron block (4) is rectangular plate-shaped, and the end surface of the iron block (4) is an inclined surface matched with the side surface of the clamping groove (21).

4. The hub structure of the electric vehicle as claimed in claim 3, wherein the iron block (4) is provided with a plurality of through holes (41) penetrating through the upper and lower side surfaces, and the side surface of the iron block (4) is further provided with a plurality of projections (42).

5. The hub structure of the electric vehicle according to claim 1, 2, 3 or 4, wherein the brake housing (3) is cylindrical, the brake housing (3) and the hub outer ring (1) are coaxially arranged, and a bearing seat (31) is coaxially arranged in the middle of the brake housing (3).

6. The hub structure of the electric vehicle as claimed in claim 1 or 2 or 3 or 4, wherein the two sides of the inner end of the web (2) and the outer peripheral surface of the brake shell (3) are in smooth transition through arc-shaped reinforcing ribs (5), and the two sides of the outer end of the web (2) and the inner wall of the hub outer ring (1) are also in smooth transition through arc-shaped reinforcing ribs (5).

7. The hub structure of an electric vehicle according to claim 1 or 2 or 3 or 4, characterized in that the number of the webs (2) is 3-9, and all the webs (2) are uniformly spaced along the circumferential direction of the hub outer ring (1).

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