KR102586452B1 - Wheel offset variable wheel assembly - Google Patents

Abstract

The present invention relates to a wheel offset variable wheel assembly, wherein the spoke portion and the hub portion are divided into two, and the hub portion is configured to be assembled and fixed to the spoke portion, so that the wheel offset can be variably adjusted according to the position of the hub portion assembled to the spoke portion. The purpose is to provide a variable wheel assembly.

Description

Wheel offset variable wheel assembly {Wheel offset variable wheel assembly}

The present invention relates to a variable wheel offset wheel assembly, and more specifically, to a variable wheel offset wheel assembly in which the wheel offset can be changed without creating a new mold.

A car wheel is the part of the wheel excluding the tire that is connected to the axle (drive shaft) and supports the load of the vehicle. It is connected to the axle through a hub bearing provided at the end of the axle, and serves to transmit the driving and braking force of the vehicle to the tire. Do it.

These automobile wheels have a wheel offset corresponding to the distance from the wheel-disk seating surface to the wheel center line, and are related to the geometry of the vehicle's suspension system and the lateral gap (gap between the side part of the car body and the side part of the tire) for each platform. Even with the same standard specifications, wheel offset and design are diversified (see Figure 1).

In addition, since conventional automobile wheels are manufactured with the spoke portion (1) and hub portion (2) integrated (see Figure 2), even for wheels of the same design applied to the same vehicle model, a separate wheel is required to adjust the wheel offset according to the tire standard. When wheels are developed and manufactured, dualization of molds is required, and when the body structure is changed to improve the vehicle exterior, etc., the existing wheel manufacturing mold is discarded and a new mold is manufactured to change the wheel offset accordingly. do. Additionally, when an improvement in wheel offset is requested to improve vehicle handling performance, a change in wheel offset is also required.

In this way, automobile wheels require change and diversification of wheel offset due to various factors, and when wheel offset is changed during the development stage, the development of a new mold must be prioritized, resulting in increased costs and development delays.

Registered Patent No. 10-0326375

The present invention was developed in consideration of the above points, and the spoke part and the hub part are divided into two, and the hub part is configured to be assembled and fixed to the spoke part, so that the wheel offset can be variably adjusted according to the position of the hub part assembled to the spoke part. The purpose is to provide a wheel assembly with variable wheel offset.

Accordingly, in the present invention, the wheel assembly is connected to the axle and transmits the driving force and braking force of the vehicle to the tire, and includes a spoke portion having a press-fit hole in a radial central portion and a hub portion that is press-fitted and fixed to the press-fit hole. A wheel offset variable wheel assembly is provided, characterized in that the wheel offset can be changed depending on the position of the hub part fixed to the hole.

According to the present invention, a rim portion for mounting a tire is integrally formed on the outside of the spoke portion, and the spoke portion is disposed at an outer end of the rim portion based on the vehicle width direction. The hub portion is press-fitted into the press-fitting hole in the vehicle width direction, and the distance between the inner surface portion of the hub portion and the center line of the rim portion in the vehicle width direction changes depending on the press-fitting position. In addition, the hub portion is press-fitted into the press-fit hole and then fixed to the press-fit hole of the spoke portion by friction stir welding.

According to the wheel offset variable wheel assembly according to the present invention, the wheel offset can be changed as needed without creating a new mold, and therefore, it is possible to quickly respond to situations that require a change in the wheel offset during development, and also allows different wheel offsets to be used. It is possible to manufacture automobile wheels using the same mold.

1 is a diagram showing the wheel offset of a car wheel
Figure 2 is a diagram showing a conventional automobile wheel
Figure 3 is an exploded perspective view showing a wheel assembly according to an embodiment of the present invention
Figure 4 is an assembled cross-sectional view showing a wheel assembly according to an embodiment of the present invention.
Figure 5 is an example showing a state in which the wheel offset changes depending on the coupling position of the hub part coupled to the spoke part.
Figure 6 is a flowchart for explaining the assembly process of the wheel assembly according to an embodiment of the present invention.

Hereinafter, with reference to the attached drawings, the present invention will be described so that those skilled in the art can easily implement it.

Here, it should be noted that directions such as inner, outer, left, right, and both sides are based on the vehicle width direction unless otherwise specified.

The wheel assembly 100 according to the present invention is connected to the axle and transmits the driving force and braking force of the vehicle to the tire. As shown in FIGS. 3 and 4, the spoke portion 120 is formed integrally with the rim portion 110. and a hub part 130 that is assembled and fixed to the spoke part 120.

The rim portion 110 is formed integrally with the outer surface of the spoke portion 120 and is formed in a substantially cylindrical shape so that a tire can be mounted and mounted on its outer circumferential surface. Specifically, the rim portion 110 is formed so that both edge portions in the vehicle width direction have the maximum diameter, allowing the tire to be mounted stably, and has a cross-section that is concavely curved approximately toward the center in the radial direction.

The spoke portion 120 connects the rim portion 110 and the hub portion 130 and has a press-fit hole 122 in its radial central portion into which the hub portion 130 is assembled. Specifically, the spoke portion 120 is formed by arranging a plurality of spokes 121 radially extending from the press-fit hole 122 in the circumferential direction, and is located at the outer end of the rim portion 110 based on the vehicle width direction. It is disposed, and the plurality of spokes 121 are integrally connected and supported by the rim portion 110.

The hub portion 130 is press-fitted and coupled to the press-fit hole 122 having a predetermined depth, and has a substantially cylindrical structure. Specifically, the peripheral surface portion 131 extends in the circumferential direction and is formed into a substantially cylindrical shape. ) and an inner surface portion 132 formed in a substantially plate shape at the inner end of the circumferential surface portion 131. And, the outer surface of the hub portion 130 is completely open.

A plurality of rib holes 133 may be formed in the circumferential surface portion 131 and arranged in the circumferential direction to improve the formability and reduce the weight of the hub portion 130. Specifically, the rib hole 133 may be formed at a certain depth from the outer end of the circumferential surface portion 131 toward the inner end.

And, an opening hole 134 is formed in the center of the inner surface portion 132 to support the hub bearing provided at the end of the axle.

When this hub portion 130 is press-fitted into the press-fit hole 122 of the spoke portion 120, it is inserted in the vehicle width direction (see FIG. 6), and depending on the press-fit position, the inner surface portion 132 and the hub portion 130 are formed. The distance (i.e., wheel offset) between the center lines of the rim portion 110 in the vehicle width direction (i.e., the center line in the vehicle width direction of the wheel assembly) L is changed (see FIG. 5).

Therefore, when the hub portion 130 is press-fitted into the press-fit hole 122 of the spoke portion 120, the wheel offset can be changed depending on the insertion amount and press-fitted position of the hub portion 130.

That is, in the wheel assembly 100 configured as above, the wheel offset is variably determined depending on the assembly position of the hub portion 130 fixed to the press-fit hole 122 of the spoke portion 120.

In addition, the hub portion 130 is not fixed to the press-fit hole 122 of the spoke portion 120 only by press-fitting, but is bonded and fixed to the press-fit hole 122 by friction stir welding after press-fitting.

The friction stir welding is a solid-state joint welded by reverse flow in the material using friction heat, and the hub portion ( The outer circumferential surface (outer surface of the circumferential part) of 130) is joined and fixed to the inner circumferential surface of the spoke portion 120 surrounding the press-fit hole.

The friction stir welding has superior heat resistance and air leakage performance compared to general bonding technology, so it is preferable for joining the dual spoke portion 120 and hub portion 130.

Meanwhile, the hub portion 130 has a plurality of lug holes 135 formed on the outer surface of the inner surface portion 132 for seating and arranging the nut member 140 and arranged in the circumferential direction. The bolt member of the hub bearing used when bolting the hub bearing of the axle and the wheel assembly 100 passes through the lug hole 135 and is fastened to the nut member 140.

In addition, as shown in FIGS. 4 and 6, a half cap 150 is assembled to the hub portion 130 to prevent exposure of the opening hole 134 and at the same time maintain the spoke portion 120 and the hub portion 130. ) prevents exposure of the joint area between the liver.

The half cap 150 is a plastic injection molded product and is fixed to the hub portion 130 by a spring hook (not shown) formed on the inside. For this purpose, the inner surface of the circumferential surface portion 131 of the hub portion 130 has the A locking protrusion (see 136 in FIG. 6) is formed by which the spring hook is elastically deformed and locked.

As shown in FIG. 6, the wheel assembly 100 configured as above is made by press-fitting the hub portion 130 into the press-fit hole 122 of the spoke portion 120 and fixing it by friction stir welding, and then attaching the hub portion 130 to the axle. In the step of combining the hub bearing with the wheel assembly 100, the nut member 140 is assembled into the lug hole 135, and then the half cap 150 is assembled and fixed to the outer end of the hub portion 130. At this time, the wheel offset is determined according to the position at which the hub portion 130 is welded and fixed on the press-fit hole 122.

Here, Figure 6 omits the hub bearing of the axle, etc., and only the wheel assembly is shown.

The wheel assembly of the present invention configured as described above has the following advantages.

1. Even if the wheel offset is dualized due to different tire specifications for the same vehicle model, each wheel can be manufactured using the same mold. In other words, car wheels with different wheel offsets can be molded using the same mold.

2. If wheel offset changes are required during vehicle development to improve design or improve handling performance, it is possible to respond quickly without developing or manufacturing a new mold.

3. It is advantageous in producing wheel samples with various wheel offsets in order to select the wheel offset optimized for the vehicle.

As the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited to the above-described embodiments, and various modifications and modifications by those skilled in the art using the basic concept of the present invention as defined in the following patent claims are made. Improvements are also included in the scope of the present invention.

100: wheel assembly
110: Limbu
120: Spoke part
121: spoke
122: Press-fit hole
130: hub part
131: circumferential surface
132: medial side
133: rib hole
134: opening hole
135: Lug hole
136: Stopper
140: Nut member
150: half cap

Claims (9)

A wheel assembly that is connected to the axle and transmits the driving force and braking force of the vehicle to the tires,
It includes a spoke portion having a press-fit hole in the center of the radial direction and a hub portion that is press-fitted and fixed to the press-fit hole, and the wheel offset can be changed depending on the position of the hub portion fixed to the press-fit hole.
A wheel offset variable wheel assembly, characterized in that the hub portion has an opening hole formed in the center of the inner side portion to support the hub bearing of the axle.
In claim 1,
A wheel offset variable wheel assembly, wherein a rim portion for mounting a tire is integrally formed on the outside of the spoke portion, and the spoke portion is disposed at an outer end of the rim portion based on the vehicle width direction.
In claim 1,
The wheel offset variable wheel assembly is characterized in that the hub portion is press-fitted into the press-fitting hole in the vehicle width direction, and the distance between the inner surface portion of the hub portion and the center line of the rim portion in the vehicle width direction changes depending on the press-fitting position.
In claim 1,
A wheel offset variable wheel assembly, characterized in that the hub portion is press-fitted into the press-fit hole and then fixed to the press-fit hole of the spoke portion by friction stir welding.
delete In claim 1,
The wheel offset variable wheel assembly is characterized in that the hub portion has a plurality of lug holes formed on the outer surface of the inner surface portion for placement of the nut member.
A wheel assembly that is connected to the axle and transmits the driving force and braking force of the vehicle to the tires,
It includes a spoke portion having a press-fit hole in the center of the radial direction and a hub portion that is press-fitted and fixed to the press-fit hole, and the wheel offset can be changed depending on the position of the hub portion fixed to the press-fit hole.
A wheel offset variable wheel assembly characterized in that the outer surface of the hub portion is open and a plurality of rib holes are formed on the circumferential surface thereof and arranged in the circumferential direction.
In claim 1,
A wheel offset variable wheel assembly, characterized in that a half cap is assembled to the hub portion to prevent exposure of the joint portion between the spoke portion and the hub portion.
In claim 1,
A wheel offset variable wheel assembly, characterized in that the spoke portion consists of a plurality of spokes extending radially with respect to the press-fit hole.