KR20120059101A

KR20120059101A - Rear suspension for vehicle

Info

Publication number: KR20120059101A
Application number: KR1020100120724A
Authority: KR
Inventors: 김기창
Original assignee: 현대자동차주식회사
Priority date: 2010-11-30
Filing date: 2010-11-30
Publication date: 2012-06-08

Abstract

PURPOSE: A rear wheel suspension device of a vehicle is provided to improve the ride quality through reducing and absorbing the vibration and impact of a torsion beam by attaching a rubber damper generally in the center in torsion beam direction. CONSTITUTION: A rear wheel suspension device of a vehicle is composed as follows. A rubber damper(5) is installed in the portion in a torsion beam(1) direction. The torsion beam is coupled with trailing arms(2) in the both side. The damper absorbs the vibration and impact of a torsion beam.

Description

Rear suspension for vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear wheel suspension of an automobile, and more particularly, to a rear wheel suspension of a vehicle in which a rubber damper penetrates a torsion beam generally in a central portion along a longitudinal direction of a CTBA (Coupled Torsion Beam Axel) torsion beam. .

The conventional Coupled Torsion Beam Axel (CTBA) suspension, which is widely used as a rear wheel suspension of a small vehicle or a medium vehicle, is shown at both ends of the torsion beam 10 extending along the width direction of the vehicle, as shown in FIG. 1. Each trailing arm 11 is joined by welding, and the front end of the trailing arm 11 is provided with a bush 12 for mounting the trailing arm to the vehicle body, while the trailing end of the trailing arm is provided. The back plate for connecting the wheel 13 and the bracket 15 for mounting the damper spring 14 and the like are attached to the wheel by welding or the like.

The torsion beam 10 has a V-shaped cross section opened downward as shown in cross section in FIG. 2 and has a circular cross section inside the cross section to reinforce the rigidity of the torsion beam 10. The torsion bar 16 may be mounted in some cases, or the torsion beam 10 itself may be manufactured in the form of a tubular beam 10a.

The above-mentioned CTBA suspension system has a relatively high running stability compared to low production cost and low weight despite the fact that its design is simple and the range of design performance is not wide. The torsional deformation of the torsion beam, the torsional deformation of the torsion beam, the position of the trailing arm, and the characteristics of the bushing are characteristic of being able to guide the understeer during rolling of the vehicle.

However, in the conventional CTBA type rear wheel suspension having the torsion beam 10 having a V-shaped cross section, the noise is excessively generated by the vertical bending vibration of the torsion beam 10 during the driving of the vehicle. There was a flaw.

In order to alleviate the vertical bending vibration of the torsion beam, a reinforcing beam supporting the left and right directions of the torsion beam may be additionally installed, but this increases the weight and cost of the vehicle.

Conventionally, in order to reduce the vibration of the torsion beam as described above, a method of applying a dynamic damper to the torsion beam or cutting a portion of the torsion beam to serve as a dynamic damper is also proposed, but the rigidity of the torsion beam is reduced or There was a flaw that the effect was not satisfactory.

Accordingly, the present invention has been made in view of the above-described circumstances, and a rubber damper is generally attached to the central portion along the longitudinal direction of the torsion beam to effectively absorb and reduce the vibration and shock of the torsion beam so as to improve the ride comfort of the vehicle. Its purpose is to provide a rear wheel suspension for a vehicle.

The present invention for achieving the above object, the damper for absorbing the vibration and / or impact of the torsion beam in a predetermined portion along the longitudinal direction of the torsion beam is integrally coupled to both ends of the torsion beam Characterized in that installed in the penetrating form.

Preferably, the torsion beam has a V-shaped cross section with an opening downward, and mounting holes penetrate through both side surfaces of the torsion beam, and the damper is fitted into the mounting hole.

The damper is characterized in that the rubber material.

The damper is characterized in that the plurality of engaging jaw and the fitting groove is formed to be sequentially alternating on the outer circumferential surface so as to be inserted into the mounting hole.

The damper has a circular cross section and has a first elastic deformation and shock absorbing space in the center thereof, and a plurality of second elastic deformation and shock absorbing spaces are formed in the circumferential direction around the first elastic deformation and shock absorbing space. It features.

According to the rear wheel suspension of a vehicle according to the present invention, a rubber damper having a radial elastic deformation shock absorbing space is formed in the mounting hole by forming a mounting hole penetrating the torsion beam in a generally central portion along the longitudinal direction of the torsion beam. The rubber damper absorbs and reduces the bending vibration and shock of the torsion beam appropriately by installing by fitting method, thereby improving the riding comfort of the vehicle by mitigating the vibration and shock transmitted from the torsion beam to the vehicle body, and thus the commercialization of the vehicle. The improvement can be aimed at, and it is easy to assemble and install because of a simple structure.

1 is a perspective view of a CTBA-type rear wheel suspension according to the prior art,
Figure 2 is a cross-sectional view of the torsion beam of the CTBA type rear wheel suspension according to the prior art,
3 is a perspective view of a CTBA type rear wheel suspension equipped with a rubber damper according to the present invention;
4 is a detailed view of a rubber damper according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the accompanying drawings.

1 is a perspective view of a configuration of a CTBA-type rear wheel suspension according to the present invention, the torsion beam (1) is disposed to be opened downwardly having a V-shaped cross section is extended along the width direction of the vehicle And the trailing arms 2 are integrally coupled to both ends thereof by welding or the like, respectively.

The trailing arm 2 is integrally welded with a bushing housing 3 for connecting to the vehicle body at one end thereof, and the bracket 4 for mounting the wheel and the suspension spring at the other end of the trailing arm 2. ) Is integrally attached by welding or the like.

In the central portion of the torsion beam generally along the longitudinal direction, mounting holes 1a are formed to penetrate both sides of the V-shape, and a rubber damper 5 having a cylindrical shape in the mounting hole 1a is formed in the torsion beam. (1) is fitted in the form of penetrating in the transverse direction and assembled.

4 shows the configuration of the rubber damper in detail, the rubber damper 5 has a cylindrical shape and is formed in a shape in which the fitting groove 5a and the locking jaw 5b are alternately arranged on the outer circumferential surface thereof.

Accordingly, if the rubber damper 5 is merely pushed into the mounting hole 1a, the rubber damper 5 protrudes through the mounting hole 1a and the fitting groove (1a) in the mounting hole 1a. Since 5a) is positioned and the locking jaw 5b is supported on the peripheral edge of the mounting hole 1a, the assembling work of the rubber damper 5 is facilitated and assembly stability is also secured.

The cross section of the rubber damper 5 is generally circular, and a circular first elastic deformation and shock absorbing space 5c is formed in the center of the rubber damper 5 from the front end to the rear end of the rubber damper along the longitudinal direction. Four second elastic deformation and impact absorption spaces 5d are arranged in the circumferential direction and are formed penetrating from the front end surface to the rear end surface of the rubber damper around the first elastic deformation and impact absorption space 5c.

When the torsion beam 1 is vibrated and impacted while the rubber damper 5 configured as described above is mounted on the torsion beam 1, the rubber damper 5 is transmitted to the rubber damper 5. And elastically deforms through the first and second elastic deformation and shock absorbing spaces 5c and 5d as shocks, thereby effectively absorbing vibrations and shocks, thereby effectively reducing vibrations and shocks applied to the torsion beam by the rubber damper. Since the transmission to the vehicle body is blocked, the deterioration of the ride comfort of the vehicle due to the vibration and impact of the torsion beam is effectively prevented.

In addition, if the size and the number of the rubber damper (5), the elastic deformation and the shock absorbing space is properly adjusted, the tuning operation is also easy, there is a convenient advantage such as removal, installation, repair and replacement.

1-torsion beam two trailing arms
3-bush housing 4-bracket
5-rubber damper

Claims

The rear wheel of the vehicle, characterized in that the damper for absorbing the vibration and / or shock of the torsion beam penetrates the torsion beam in a predetermined portion along the longitudinal direction of the torsion beam, the trailing arm is integrally coupled to both ends. Suspension.

The vehicle according to claim 1, wherein the torsion beam has a V-shaped cross section having an opening downward, and mounting holes penetrate through both sides of the torsion beam so that the damper is fitted into the mounting hole. Rear wheel suspension.

The rear wheel suspension of an automobile according to claim 1, wherein the damper is made of rubber.

The rear wheel suspension apparatus of claim 1, wherein the damper is formed such that a plurality of engaging jaws and fitting grooves are alternately formed on an outer circumferential surface of the damper so as to be inserted into the mounting holes.

The method according to claim 1, wherein the damper has a circular cross-section and has a first elastic deformation and shock absorbing space in the center, a plurality of second elastic deformation and shock absorbing space around the first elastic deformation and shock absorbing space Rear wheel suspension of a vehicle, characterized in that formed in the circumferential direction.