KR20150066110A - Structure of trailing-arm - Google Patents

Abstract

The present invention relates to a structure of a trailing arm that is connected to a vehicle body at a front side and to a wheel coupled to a braking device at a rear side so as to support the behavior of the wheel, A main plate having a carrier part extending rearwardly of the arm part and having a wheel mounted on its outer surface; And a reinforcing member mounted on the carrier part for rigid reinforcement, wherein the main plate has an arm part and a carrier part integrally formed.
According to the present invention configured as described above, the carrier and the trailing arm can be integrally formed to reduce the cost, and the number of parts can be reduced, so that the assembling process can be shortened.

Description

Structure of trailing-arm {Structure of trailing-arm}

The present invention relates to a structure of a trailing arm, and more particularly, to a trailing vehicle which is capable of reducing the production cost and simplifying the number of parts by integrally forming the carrier, And the structure of ring rock.

In the field of automobiles, measures are being taken to integrate and simplify components in order to reduce costs and lighten the vehicle through modularization of components.

For example, front end modules, crash pad modules, suspension modules, and rolling chassis modules are being integrated. More specifically, parts are being integrated and simplified. Such a flow is also applied to a rear-wheel suspension structure of a vehicle.

BACKGROUND OF THE INVENTION [0002] In a passenger vehicle, a rear suspension is generally of a torsion beam axle type and a multi-link type.

Among these, the multi-link type has excellent adaptability to changes of alignment during bump and rebound of shock absorbers and springs, and has excellent ability to ground the road surface by keeping the wheel horizontally on the road surface.

A wheel coupled with a braking device (disc brake) 3 is mounted on a carrier 2, and the carrier 2 is mounted on the upper arm 3. The rear wheel suspension structure of the conventional multi- Is connected to the cross member 7 through the lower arm 4, the lower arm 5 and the assist arm 6 and is configured to be connected to a side member (not shown) at the lower portion of the vehicle body through the trailing arm 1. [

The trailing arm 1 is connected to the front of the carrier 2 to support the forward and backward movement of the carrier 2, and a bush 1a made of an elastic body is coupled to the front end thereof to absorb a part of the inside- So that the upper arm 4, the lower arm 5 and the assist arm 6 support the lateral force acting on the carrier 2 and the vertical movement of the carrier 2 is supported by the spring and the shock absorber .

The upper arm 4, the lower arm 5 and the assist arm 6 connect the cross member 7 arranged in the vehicle width direction to the carrier 2 and a spring and a shock absorber Respectively. The carrier 2 is mounted with a wheel and a braking device 3, and the wheel is connected to an axle fitted through the carrier 2 so as to be rotatably mounted.

(Not shown), the carrier 2 is provided with an ABS (anti-lock brake system) device including a tone wheel as well as the above-described arms (lower arm, upper arm, assist arm) And brake parts are additionally mounted. Accordingly, the carrier 2 is required to have rigidity higher than a predetermined standard, and is generally manufactured from a cast product rather than a steel press method. On the other hand, the trailing arm 1 is manufactured by a pressing method using a general steel sheet as a material so that the tire can be deformed to absorb a lateral displacement when the tire moves up and down. Then, the carrier 2, which is a cast product, and the trailing arm 1 made of steel are fastened to the vehicle body with bolts.

Therefore, in order to reduce the cost and the weight of the vehicle, it is necessary to provide a structure in which the carrier and the trailing arm are integrally formed as a means of applying integration and simplification of parts.

Therefore, the present invention can be manufactured by a single step (e.g., press method) so that the carrier is integrally formed, thereby reducing the cost and simplifying the assembly of the vehicle body. The present invention is directed to providing a structure of a trailing arm capable of improving the performance of the trailing arm.

According to an aspect of the present invention, there is provided a structure of a trailing arm which is connected to a vehicle body at a front side thereof and a wheel coupled to a braking device at a rear side thereof to support a behavior of the wheel, A main plate having an arm part mounted with a bush and a carrier part extending rearwardly of the arm part and having a wheel mounted on its outer side; And a reinforcing member mounted on the carrier part for reinforcement of rigidity, wherein the main plate is formed integrally with the arm part and the carrier part.

Wherein the carrier part has a flat flat surface on which the reinforcing part is seated and a bent surface curved inward in an end direction of the flat surface, wherein the opposite surface of the side where the reinforcing part is seated on the flat surface and the flat surface are parallel .

In the present invention, a through hole is formed on the flat surface so that the axle is connected to the wheel, a second through hole is formed in the stiffener to be connected to the through hole, and a spindle plate is coupled to the outer surface of the carrier part, A bolt hole for bolting the bolt and a third through hole for connecting the through hole and the second through hole are formed in the spindle plate.

The upper part of the carrier part is provided with a space in which an upper arm is formed by bending a bending face so that the upper arm can be inserted and joined. The carrier part is formed in a shape with an open bottom under a flat surface, The lower end of the reinforcing member is formed in a constricted shape having a shorter length than the upper end so that the assisting arm enters between the bent surfaces of both sides and the reinforcing member to form a fastening space.

In addition, the arm part or the carrier part may be mounted with a bracket so that the stabilizer bar can be selectively fastened.

According to the present invention configured as described above, the carrier and the trailing arm can be integrally formed to reduce the cost, and the number of parts can be reduced, so that the assembling process can be shortened.

In the present invention, the stiffener includes a stiffener, and the stiffener is manufactured to have a predetermined size to increase the thickness of the carrier part, so that the rigidity can be efficiently reinforced.

In the present invention, mounting of the upper arm, the lower arm, and the assist arm is performed in a space formed between the bent surfaces (without passing through separate brackets) and a space between the bent surfaces and the reinforcing member, .

1A is a diagram showing a conventional multi-link type rear wheel suspension structure,
FIG. 1B is an enlarged view of a portion on which a carrier is mounted in FIG. 1A,
FIG. 1C is a view showing only a portion where a carrier and a trailing arm are combined in FIG. 1A,
FIG. 2 is a perspective view of a trailing arm according to a preferred embodiment of the present invention when viewed from the inside to the outside; FIG.
FIG. 3 is a view illustrating a carrier part of a trailing arm according to a preferred embodiment of the present invention,
4 is a view of a trailing arm according to a preferred embodiment of the present invention viewed from the outside.

The present invention relates to a trailing arm, in which a front side is connected to a vehicle body, and a rear side is connected to a wheel coupled to a braking device, wherein the carrier is integrally formed.

The structure of the trailing arm of the present invention is advantageous in terms of cost / weight as compared with the conventional structure because the trailing arm of the present invention is integrally formed with the carrier which is made of cast iron and the trailing rock made of steel (can be manufactured only by press process) unsprung mass), it is possible to improve fuel economy and ride comfort.

Hereinafter, the structure of the trailing arm according to the present invention will be described in more detail with reference to the drawings.

2 and 3, the integrated structure of the trailing arm and the carrier according to the present invention includes a main plate 10 having a reinforcing member 20 mounted thereon, the main plate 10 being connected to a vehicle body at a front end thereof And a carrier part (10b) extending to the rear of the arm part (10a) and having a wheel and a braking device mounted on an outer surface thereof, wherein the arm part (10a) And the carrier part 10b are integrally formed.

The carrier part 10b is provided with a reinforcing member 20 for reinforcement of rigidity and has a flat flat face 11 on which the reinforcing member 20 is seated and a bent face 11b bent inward from the end of the flat face 11, (13).

In a preferred embodiment of the present invention, the opposite surface 22 of the side on which the reinforcing portion 20 is seated on the flat surface 11 and the opposite surface 22 of the side surface on which the reinforcing portion 20 is seated on the flat surface 11 (so as to have the effect of reinforcing the rigidity, The flat surface 11 is formed in parallel so as to maintain a constant distance as shown in Fig.

A through hole 12 is formed in the flat surface 11 and a second through hole 21 is formed in the reinforcing member 20 so as to be connected to the through hole 12 so that the axle of the wheel can be connected to the carrier part 10b. .

As shown in FIG. 4, the spindle plate 30 is coupled to the outer surface of the carrier part 10b so that the braking device and the wheel can be mounted on the carrier part 10b. The spindle plate 30 is provided with a bolt hole 32 for bolting and a third through hole 31 formed in the through hole 12 and the second through hole 21, .

In the present invention, the upper part of the carrier part 10b is formed with a space A in which the upper arm is bent so that a space for the upper arm to enter and be bolted can be formed. In addition, the carrier part is formed in such a manner that the lower part is opened so that the lower arm and the assist arm (or two lower arms instead of the assist arm) can be mounted at the lower part of the carrier part 10b, and a lower arm or an assist arm The lower end of the stiffener 20 is formed in a constricted shape having a shorter length than the upper end so as to enter between the bending faces 13 on both sides and the stiffener 20 to form ' .

A stabilizer bar (not shown) mounted on the arm part 10a or the carrier part 10b to reduce the tilting of the vehicle body may be selectively fastened to the arm part 10a or the carrier part 10b in a bent shape having a predetermined length. The bracket 40 can be joined by welding.

In the structure of the present invention, the carrier part 10b of the main plate 10 is formed so as to protrude outwardly of the vehicle, and the axle can be penetrated, and the arms (lower arm, upper arm, And the flat surface 22 of the reinforcing member 20 is configured to maintain a certain distance from the flat surface 11 of the carrier part 10b so that a predetermined rigidity can be secured.

The present invention having the above-described structure can be manufactured integrally with only one manufacturing method as compared with the conventional structure in which the carrier and the trailing arm are separately manufactured and assembled, so that it is possible to reduce costs and simplify the number of parts, Fuel efficiency improvement and ride comfort improvement can be expected.

As described above, the embodiments disclosed in the present specification and drawings are only illustrative of specific examples in order to facilitate understanding of the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: main plate 10a (arm part, 10b: carrier part)
11: Flat surface
12: Through hole
13:
20: Stiffener
30: Spindle plate
40: Bracket

Claims (5)

A structure of a trailing arm, which is connected to a vehicle body at a front side thereof and to a wheel coupled to a braking device at a rear side thereof to support the behavior of the wheel,
A main plate having an arm part mounted with a bush to be connected to a vehicle body at a front end thereof and a carrier part extending to the rear of the arm part and having a wheel mounted on an outer surface thereof; And
And a stiffener mounted on the carrier part for rigid reinforcement,
Wherein the main plate has an arm part and a carrier part formed integrally with each other.
[2] The apparatus of claim 1, wherein the carrier part has a planar flat surface on which the reinforcing part is seated and a tortuous surface bent in the inward direction at an end of the flat surface,
Wherein the reinforcing portion is formed parallel to the flat surface at a predetermined distance from the opposite surface of the side where the reinforcing portion is seated on the flat surface.
[3] The apparatus of claim 2, wherein a through hole is formed in a flat surface of the wheel so that the axle is connected to the wheel, a second through hole is formed in the reinforcing member,
Wherein a spindle plate is coupled to an outer surface of the carrier part to mount a braking device and a wheel, wherein the spindle plate has a bolt hole for bolting, a third through hole for connecting the through hole and the second through hole, Of the trailing arm.
[5] The apparatus according to claim 2, wherein the upper part of the carrier part is provided with a space in which the upper arm is formed so that the upper arm is bent so that the upper arm can be inserted and engaged,
The lower end of the reinforcing member is formed of a constricted portion having a shorter length than the upper end, so that the lower end of the reinforcement member is shorter than the upper end thereof, so that the lower end of the reinforcement member is inserted into the lower portion of the lower arm. And the trailing arm is formed into a shape of a trailing arm.
The trailing arm according to claim 4, wherein a bracket is mounted on the arm part or the carrier part so that the stabilizer bar can be selectively fastened.

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