KR100559897B1 - roll rod for vehicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll rod for a vehicle, wherein the rear side insulation portion 520 constituting the roll rod 5 is elastically supported with a rigid member supporting member 521 and one end of the rod portion 530. A plurality of torsion beam members 522 formed in a rod shape and having one end coupled to the front surface of the support member 521, and the front surface of the support member 521 while surrounding the torsion beam member 522. Rubber member 523 which is vulcanically bonded to the body, and the housing member being vulcanized while partially wrapping the outer surface of the rubber member 523 and coupled to the cross member 4 through a plurality of fastening bolts 524a. 524), which is excellent in absorbing shock and vibration generated during idle or rapid acceleration and sudden stop of the vehicle, not only to improve the riding comfort but also to improve the NVH performance of the vehicle. It is.

Description

Roll rod for vehicle

1 is a plan view for explaining the structure of the engine and the transmission assembly having a three-point mounting support structure,

2 is a perspective view for explaining a conventional roll rod,

3 is a left side view of FIG. 1;

4 is a plan view of a roll rod according to the present invention;

5 is a partial cross-sectional view taken along line II of FIG. 4;

6 and 7 are operation diagrams for showing the vibration isolation state of the roll rod according to the present invention during the idle and acceleration and deceleration of the vehicle.

<Description of Symbols for Main Parts of Drawings>

4-Crossmember 5-Roll Rod

9-Support Bracket 510-Front Side Insulation

520-Rear Insulation 530-Rod

521-Supporting member 522-Torsion beam member

523-Rubber member 524-Housing member
E-Engine T-Transmission

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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll rod for a vehicle. In particular, it is possible to effectively attenuate vibrations in a wide range of frequencies generated during idle and acceleration and deceleration of the engine, thereby minimizing vibration transmission to the vehicle body, as well as NVH of the vehicle. (Noise Vibration Harshness) The present invention relates to a roll rod for a vehicle that can improve performance.

In general, an assembly of an engine and a transmission is coupled to a subframe at a lower end thereof, and the subframe is coupled to a body frame forming an engine compartment, so that the assembly of the engine and the transmission is installed in the engine compartment.

Here, when the assembly of the engine and the transmission is installed in the engine room via the subframe, the assembly of the engine and the transmission is installed with a three-point mounting support structure or a four-point mounting support structure depending on the vehicle model.

That is, the three-point mounting support structure means that when the assembly of the engine E and the transmission T is installed in the engine room via the subframe, the engine E stops as shown in FIG. 1. The transmission T is installed to be connected to the vehicle body, and the transmission T is installed to be connected to the vehicle body via the transmission mounting stopper 2, and the engine E and the transmission T assembly facing the rear side of the vehicle body are predetermined. The part refers to a structure that is installed to be connected to the cross member 4 constituting the suspension of the vehicle via the roll rod (3).

In addition, the four-point mounting support structure excludes the roll rod 3 from the three-point mounting support structure, and predetermined portions of the engine E and the transmission T assembly facing toward the front of the vehicle body via the front roll stopper. Installed to be connected to the vehicle body, the predetermined portion toward the rear of the vehicle body refers to the structure to be installed to be connected to the vehicle body via the rear roll stopper.

In addition, when installing the assembly of the engine (E) and the transmission (T) in the engine room, the engine (E) is first assembled using the engine mounting stopper (1), and then the transmission (T) is mounted on the transmission mounting stopper (2). ) Is assembled using the engine mounting stopper (1) and the transmission mounting stopper (2) on the torque roll shaft (S) connecting the engine (E) and the transmission (T) as shown in FIG. It will always be installed.

The torque roll shaft (S) refers to a virtual rotation center shaft connecting the engine (E) and the transmission (T) to minimize the transmission of vibration generated when the engine (E) is driven to the vehicle body.

As described above, the conventional roll rod 3 which serves as a medium to connect the predetermined portion of the engine E and the transmission T assembly facing the rear of the vehicle body with the cross member 4 is illustrated in FIGS. As shown in Fig. 3, the front side insulating portion 310 is coupled to the transmission T side through the support bracket 9, and the rear side is coupled to the cross member 4 side through the fastening bolt 6. It is composed of an insulating part 320 and a rod part 330 which integrally connects the front and rear side insulating parts 310 and 320.

Here, the front and rear side insulating parts 310 and 320 are formed of inner pipe members 311 and 321 and outer pipe members 312 and 322 and rubber members 313 and 323 press-fitted therebetween, respectively, and the rod part 330 Both ends are made by welding the outer pipe members 313 and 323 of the front and rear side insulating parts 310 and 320.

On the other hand, the roll rod 3 as described above is typically more sensitive to the rear side insulating portion 320 to insulate the shock and vibration (Shock & Judder) than the front side insulating portion 310, Accordingly, in the art, much effort has been made to improve the performance of the roll rod 3 by tuning the rear side insulation 320.

However, the conventional roll rod 3 as described above is particularly susceptible to shock and vibration generated when the rear side insulation portion 320 is ON / OFF of the start or sudden acceleration and sudden stop of the vehicle. Because of the characteristics, the insulation performance of the vibration and noise transmitted to the vehicle body as a whole falls, and thus there was a problem that the NVH performance of the vehicle worsens.

That is, when the stiffness of the rear side insulation unit 320 is generally tuned low, the idle vibration of the engine generated in the high frequency region at the time of starting (ON) / off (OFF) of the engine is effectively insulated, but on the contrary, Since the insulation performance against vibration and shock occurring in the low frequency range is relatively low, the conventional roll rod 3 has a problem that it does not effectively attenuate the vibration in the wide frequency range and thus worsens the NVH performance of the vehicle.

Accordingly, the present invention has been devised to solve the above problems, and effectively attenuates both shock and vibration generated during the on / off of the start or sudden acceleration and deceleration of the vehicle through the tuning of the rear insulation. It is an object of the present invention to provide a roll rod for a vehicle that can minimize the transmission to the vehicle body and thus improve the NVH performance.                         

The present invention for achieving the above object, for a vehicle having a front side insulating portion coupled to the transmission side via a support bracket, a rear side insulating portion coupled to the cross member side, and a rod portion connecting the front and rear side insulating portion In the roll rod, the rear side insulating portion is formed of a support member of a rigid body integrally provided at one end of the rod portion, a plurality of torsion each end is coupled to the front surface of the support member The rubber member is vulcanized and bonded to the front surface of the support member while surrounding the beam member, the torsion beam member, and is partially bonded to the cross member side through a plurality of fastening bolts. The paper is characterized by consisting of a housing member.

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

Figure 4 is a plan view of a roll rod according to the present invention, Figure 5 is a partial cross-sectional view of the line I-I of Figure 4, will be described with the same reference numerals to the same parts as the conventional structure.

The roll rod 5 according to the present invention has an engine E and a transmission T facing the rear side of the vehicle body when the assembly of the engine E and the transmission T is installed in the engine room using a three-point mounting support structure. By connecting a predetermined part of the assembly with a predetermined part of the cross member 4 constituting the suspension, it plays a role of minimizing the transmission of vibration and noise generated when the engine E is driven to the vehicle body.

That is, the roll rod 5 according to the present invention, as shown in Figures 4 and 5, the front side insulating portion 510 is coupled to the transmission (T) side through the support bracket 9 (shown in Figure 2) ), A rear side insulating portion 520 which is coupled to the cross member 4 side through the fastening bolt 524a, and a rod portion 530 which integrally connects the front and rear side insulating portions 510 and 520. do.

Here, the front side insulation portion 510 is composed of an inner pipe member 511 and an outer pipe member 512 and a rubber member (not shown) press-fitted therebetween.

In addition, the rear side insulating portion 520 is formed of a rigid support member 521 integrally provided at one end of the rod portion 530 and a rod-shaped bar having elasticity. A plurality of torsion beam members 522 coupled to the front surface of the support member 521, a rubber member 523 that is vulcanically bonded to the front surface of the support member 521 while surrounding the torsion beam member 522, and It is composed of a housing member 524 which is coupled to the cross member 4 side through a plurality of fastening bolts 524a and vulcanized while partially wrapping the outer surface of the rubber member 523.

On the other hand, the housing member 524 is coupled to surround the remaining portion of the rubber member 523 at a position spaced apart from the support member 521 by a predetermined interval.

As such, the housing member 524 is separated from the support member 521 without enclosing the rubber member 523 as a whole and is coupled to cover only a part of the rubber member 523. This is to induce deformation of the rubber member 523 by shock and vibration generated during rapid acceleration or sudden stop, and to increase the shock and vibration absorption function through the deformation of the rubber member 523.

Therefore, when the vehicle is idle, very slight vibrations are generated in the high frequency range, and the engine E mainly vibrates only in the vertical direction due to the idle vibration in the high frequency range. Accordingly, the front side insulation portion 510 and the rod portion 530 only perform the movement in the vertical direction as shown in FIG.

As a result, the roll rod 5 of the present invention can sufficiently insulate the idle vibration of the high frequency region through the deformation of the rubber member 523 constituting the rear side insulating portion 520, thereby transmitting to the vehicle body. As a result, the vehicle's overall NVH performance is improved.

On the other hand, during rapid acceleration or sudden stop of the vehicle, the vibration width of the engine E is generated in parallel with the vibration in the up and down directions so that the vibration width is very large, and thus the roll rod 5 of the present invention is constructed. The compressive force, the tensile force, and the torsional force are simultaneously generated in the rear side insulation portion 520.

As a result, the housing member 524 constituting the rear side insulating portion 520 is subjected to pressure to be moved toward the front side insulating portion 510 as shown in FIG. 7, whereby the rubber member 523 is compressed. Deformation and at the same time the torsion beam member 522 also can be effectively insulated from the large vibration and shock generated in the low-frequency region as the deformation is elastically bent.

Therefore, since the roll rod 5 according to the present invention can effectively insulate the vibration and impact of the low frequency region generated during rapid acceleration and deceleration of the vehicle, it is possible to block the transmission to the vehicle body, and the torsion beam member 522 As a result, the structural rigidity of the rear side insulator 520 can be improved, thereby improving the overall vehicle NVH performance.

As described above, the roll rod according to the present invention is excellent in absorbing shock and vibration generated during idle, rapid acceleration and sudden stop of the vehicle, which not only helps to improve the riding comfort but also the NVH performance of the vehicle. There is also an effect that can be improved.

Claims (2)

On a vehicle roll rod having a front side insulation portion coupled to the transmission T side through the support bracket 9, a rear side insulation portion coupled to the cross member 4 side, and a rod portion connecting the front and rear side insulation portions. In The rear side insulating part 520 is formed of a rigid support member 521 integrally provided at one end of the rod part 530 and a rod shape having elasticity, and each end thereof is supported by the support member 521. A plurality of torsion beam members 522 coupled to the front surface of the c), a rubber member 523 vulcanized and bonded to the front surface of the support member 521 while surrounding the torsion beam member 522, and the rubber member 523 Rolling the vehicle, characterized in that consisting of a housing member 524 which is coupled to the cross member (4) side through a plurality of fastening bolts (524a) and vulcanized while partially wrapping the outer surface. The roll rod for a vehicle according to claim 1, wherein the housing member (524) is coupled to surround the remaining part of the rubber member (523) at a position spaced apart from the support member (521) at a predetermined interval.

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