KR20080054825A - Structure of axle assembly for a driving wheel - Google Patents

Abstract

An axle assembly of a driving wheel is provided to improve durability by spline-assembling a hub and a fixed shaft and a hug and a disk brake. An axle assembly of a driving wheel comprises a hub(22), a wheel bearing assembly(23), a brake disk(21), a knuckle(24), an assembly bolt(25a), a fixed shaft(26), and a nut member(27). The wheel bearing assembly is assembled to an outer periphery surface of one part of the hub. The brake disk is assembled to an outer periphery surface of the other part of the hub. The knuckle is assembled to the wheel bearing assembly from a rear part of the wheel bearing assembly. The assembly bolt engages the knuckle with the wheel bearing assembly. The fixed shaft is fixed to a rear part of the other part of the hub by penetrating a through hole of the hub. The nut member is assembled to a front end of the fixed shaft. The hub and the fixed shaft and the hub and the brake disk are spline-assembled.

Description

Structure of axle assembly of driving wheel {STRUCTURE OF AXLE ASSEMBLY FOR A DRIVING WHEEL}

1 is a partial cross-sectional perspective view showing the configuration of the structure of the axle assembly of the drive wheel according to the prior art.

Figure 2 is a partial cross-sectional perspective view showing the configuration of the structure of the axle assembly of the drive wheel according to the present invention.

3 is a front cross-sectional view of FIG.

4 is an exploded view of FIG. 3;

5 is a detailed view of the main part of FIG.

6 is a schematic side cross-sectional view as seen from 'A' of FIG.

<Description of the symbols for the main parts of the drawings>

21.Brake Disc

22. Hub

23. Wheel Bearing Assembly

24. Knuckles

25a. Tightening Bolt

26. Fixed Shaft

27. Nut member

28. Key

The present invention relates to a structure of an axle assembly of a drive wheel, and more particularly, to a structure of an axle assembly of a drive wheel improved in order to simplify the structure, to ensure a stable durability performance, and to improve the performance of the brake.

In general, the axle of the vehicle is a portion that supports the weight of the vehicle through the wheel, and is divided into a driving wheel axle for transmitting the power generated from the engine and a driven wheel axle for transmitting the driving force.

In addition, the driving wheel axle serves to transmit the driving force transmitted from the engine to the wheels through the transmission and the reduction gear, and serves to support the force in the up, down, left, and right directions received from the road surface. This corresponds to the rear axle of the drive car.

In addition, the axle is connected to the wheel of the wheel through the hub, the front end of the hub is covered with a cover to prevent leakage of lubricating oil inside while preventing the inflow of dust or foreign matter.

On the other hand, the disc brake of the vehicle is to brake by pressing the brake pads hydraulically from both sides to the brake disc that rotates with the wheels. Such disc brakes are made of special cast iron and are coupled to the hub and rotate together with the brake disc. And a caliper saddle-shaped with special cast iron, a brake cylinder coupled to the left and right sides of the caliper, a piston, and a pad installed on the piston to generate braking force by friction with the brake disc.

And the axle assembly (Axle Assembly) has a double row unit bearing structure, as shown in Figure 1, comprising a hub assembly 11, brake disk 12, wheel bearing 13 and knuckle 14 do.

A hub bolt 15 is fastened to the hub assembly 10, the hub flange of the hub assembly 11 being driven out of the vehicle by the hub bolt 14 and the brake disc 12 and wheels (not shown). The inner side of the vehicle is coupled with the wheel bearing 13 to engage other suspension (not shown) components such as the knuckle 14 and the carrier (not shown).

The wheel and the brake disc 12 and the hub assembly 12 rotate while the vehicle is driving, and the fixed knuckle 40 or the wheel bearing 13 connected to the carrier supports the load of the vehicle, and also rotates the vehicle. It will play a role of making it smooth.

Meanwhile, the brake disc 12 is fastened by using the hub bolts 14 to fix the hub flange of the hub assembly 12, and the brake disc 12 of the vehicle, such as the brake disc 12 assembled to the knuckle 14, is applied to the brake disc 12. In addition, the vehicle is stopped by the frictional resistance between the brake pad (not shown) and the disk (not shown).

The axle assembly thus constructed has a complicated assembly process and a large distribution of final clearance and service life.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a structure of an axle assembly of a drive wheel, in which an assembly process is simple and durability is improved.

The structure of the axle assembly of the drive wheel of the present invention for achieving the above object, the hub; A wheel bearing assembly coupled to one outer peripheral surface of the hub; A brake disc coupled to the other outer circumferential surface of the hub; A knuckle fastened to the wheel bearing assembly at the rear of the wheel bearing assembly; A fastening bolt for fastening the knuckle and the wheel bearing assembly; A fixed shaft fixedly coupled through the center through hole of the hub at the rear of the other side of the hub; And a nut member fastened to the front end of the fixed shaft, wherein the hub and the fixed shaft are spline-coupled, and the hub and the brake disc are also spline-coupled.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a partial cross-sectional perspective view schematically showing the configuration of the structure of the axle assembly of the drive wheel according to the invention, Figure 3 is a front cross-sectional view of Figure 2, Figure 4 is an exploded view of Figure 3 5 is a detailed view of the main part of FIG. 3.

Referring to each of these figures, the structure of the axle assembly of the drive wheel according to the present invention includes a hub (or spindle) 22, a wheel bearing assembly 23 coupled to one outer peripheral surface of the hub 22, and the hub. A brake disc 21 coupled to the other outer circumferential surface of the 22, a knuckle 24 fastened to the wheel bearing assembly 23 at the rear of the wheel bearing assembly 23, the knuckle 24 and the wheel bearing assembly; A fastening bolt 25a for fastening the 23, a fixed shaft 26 fixedly coupled through the center through hole 22b of the hub 22 at the rear of the other side of the hub 22, and the fixed shaft 26 It is configured to include a nut member 27 is fastened to the threaded portion (26b) formed in the front end portion.

At this time, the hub 22 and the fixed shaft 26 are splined, and the hub 22 and the brake disc 21 are also splined.

In addition, splines are formed only at a coupling portion to which they are coupled, that is, coupling portions 22a and 22b of the hub 22, coupling portion 26a of the fixed shaft 26 and coupling portion 21a of the brake disc 21. do.

5 and 6, a key 28 is press-installed on one side to which the hub 22, the wheel bearing assembly 23, and the brake disc 21 are coupled to each other. 28 is provided in a circumference at a predetermined angle, and specifically, eight are provided.

3 and 4, the wheel bearing assembly 23 and the hub 22 are coupled to be integral with each other, and the brake disc 21 is coupled to one side to be integral with them. . That is, the bearing 23a is coupled to the wheel bearing assembly 23, and the bearing 23a is coupled with the hub 22, and the brake disc 21 is coupled to the side thereof.

On the other hand, the reference numeral 25 in the drawings shows a fastening bolt coupled to the brake disc 21.

Referring to the operation of the structure of the axle assembly of the drive wheel according to the present invention having the configuration as described above are as follows.

Referring back to the drawings, the structure of the axle assembly of the drive wheel according to the present invention is a structure that reinforces the disadvantages of the fifth generation bearing in order to reduce the design freedom and cost, the performance of the brake. That is, the present invention is an axle assembly having a bearing 23a in which the hub flange shape is eliminated in the conventional third generation bearing and the brake disc 21 is integrated with the hub 22.

The fifth generation bearing 23a applied to the present invention has a structure in which the brake disc 21 can be easily replaced, unlike the conventional bearing.

However, the conventional brake disc 21 has a problem that the shear stress is concentrated on the spline and the neck 22c of the hub 22. This requires a structure in which the brake disc 21 and the hub 22 are perfectly coupled.

Therefore, the structure of the axle assembly of the driving wheel according to the present invention, the hub 22 and the fixed shaft 26 and the hub 22 and the brake disk 21 so that the spline coupling of the hub 22 and the fixed shaft ( 26 and spline are formed in the engaging portions 22a, 22b, 26a, 21a to which the brake disc 21 is coupled to each other.

5 and 6, the surface of the brake disc 21 is formed by processing the key groove and press-fitted into the hub 22 and the key 28. As shown in FIG. In addition, the splined surface of the brake disc 21 and the eight additional keys 28 increase the coupling stiffness, thereby improving the shear stress of the neck 22c of the hub 22.

As described above, the structure of the axle assembly of the driving wheel according to the present invention has the following effects.

By making each part spline-coupled and key-coupled to a coupling part such as a brake disc surface, the assembly process is simpler, the durability is improved, and the design freedom is improved than in the related art. And it is possible to secure stable durability.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (6)

Herbs; A wheel bearing assembly coupled to one outer peripheral surface of the hub; A brake disc coupled to the other outer circumferential surface of the hub; A knuckle fastened to the wheel bearing assembly at the rear of the wheel bearing assembly; A fastening bolt for fastening the knuckle and the wheel bearing assembly; A fixed shaft fixedly coupled through the center through hole of the hub at the rear of the other side of the hub; And a nut member fastened to a front end of the fixed shaft. At this time, the hub and the fixed shaft is spline-coupled, the hub and the brake disk is spline-coupled, characterized in that the structure of the drive wheel axle assembly. The method of claim 1, And a spline is formed only at the coupling portion at which the hub, the fixed shaft, and the brake disc are coupled to each other. The method of claim 1, One side of the hub, the wheel bearing assembly and the brake disk surface is coupled to the structure of the axle assembly of the drive wheel, characterized in that the key is press-installed. The method of claim 3, The key is a structure of the axle assembly of the drive wheel, characterized in that a plurality is installed at a predetermined angle on the circumference. The method of claim 4, wherein The key is the structure of the axle assembly of the drive wheel, characterized in that eight installed. The method of claim 1, The wheel bearing assembly and the hub are coupled to each other integrally, wherein the brake disc is coupled to one side so as to be integral with them.

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