KR20040035263A - rear roll stopper transmission mounting bracket for vehicle - Google Patents

Abstract

PURPOSE: A rear roll stopper of a vehicle is provided to improve the durability, minimize transmission of vibration and noise to a vehicle body side, and improve NVH(Noise Vibration Harshness) performance of the vehicle, by using the rear roll stopper comprising a fluid-filled damper to effectively reduce vibration and noise of a wide frequency region band produced by RPM in driving an engine. CONSTITUTION: A rear roll stopper of a vehicle comprises a first mounting bush member(11) bolted to an engine and a transmission assembly; a second mounting bush member(12) bolted to a cross member(4); a fluid-filled cylinder member(13) one end of which is integrally combined with the first mounting bush member and the other end of which is installed toward the second mounting bush member; a piston member(14) and piston rod member(15) one end of which is combined to the second mounting bush member and the other end of which is disposed in the fluid-filled cylinder member, to guide rectilinear movement of the fluid-filled cylinder member when the engine and the transmission assembly have movement rotating about a torque roll axis; a first elastic member(16) disposed in the fluid-filled cylinder member; and a second elastic member(17) one end of which is fixed to a cylinder-outer seat(13b) and other end of which is fixed to a cross member seat(4b). The first elastic member covers the piston rod member while both ends of the first elastic member are each fixed to a piston rod seat(15a) and a cylinder-inner seat(13a).

Description

Rear roll stopper transmission mounting bracket for vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear roll stopper of an automobile. In particular, it is possible to effectively attenuate vibration in a wide frequency range generated by RPM during engine driving, thereby minimizing vibration transmission to a vehicle body, and in addition, performance of a vehicle's noise vibration harness (NVH). It also relates to a rear roll stopper of a vehicle that can be improved.

In general, the assembly of the engine and the transmission has a structure in which the lower end thereof is coupled to the subframe, and the subframe is coupled to the body frame forming the 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 four-point mounting support structure or a three-point mounting support structure depending on the vehicle model. Only the three point mounting support structure will be described.

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 so as to be connected to the cross member (4) constituting the suspension of the vehicle via the rear roll stopper (3).

On the other hand, the four-point mounting support structure is such that the predetermined portion of the engine (E) and transmission (T) assembly facing the front of the vehicle body to the three-point mounting support structure is connected to the vehicle body via a front roll stopper (not shown). Refers to the structure to be installed.

When the assembly of the engine E and the transmission T is installed in the engine room, the engine E is 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.

Here, 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) to the vehicle body.

On the other hand, as described above, the conventional rear roll stopper (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). As shown in FIG. 2, the first mounting bushing member 3a is bolted and coupled to the assembly of the engine E and the transmission T, and the second bolting is coupled to the cross member 4. It comprises a mounting bushing member 3b and a connecting rod member 3c for integrally connecting them.

In this way, the rear roll stopper 3 is configured to have the assembly of the engine E and the transmission T centered on the torque roll shaft S at the time of starting (ON) / off (OFF) of starting or when traveling or during rapid start and stop. It controls the movement when it has a rolling motion (rolling motion), and also minimizes the transmission to the vehicle body by attenuating the vibration and noise generated during the rolling motion of the engine (E) and the transmission (T) assembly. Will be performed.

However, the conventional rear roll stopper 3 is in a state in which a structure for attenuating vibration and noise generated during engine driving depends entirely on the first and second mounting bushing members 3a and 3b. Unless the sizes of the first and second mounting bushing members 3a and 3b are changed, not only the vibrations of the wide frequency range generated by RPM can be effectively attenuated, but also the NVH performance of the entire vehicle is deteriorated. There was this.

In addition, when the rear roll stopper 3 of the related art increases the first and second mounting bushing members 3a and 3b in order to solve the above problems, not only the interference problem with the peripheral parts is generated, but also the When the strength is weakened to solve one problem, there remains a problem of weak durability.

In addition, the conventional rear roll stopper (3) is installed so that one end thereof is connected to the cross member (4) constituting the suspension, as described above, the cross member (4) to the rigid reinforcement as shown in FIG. It is to be provided with a separate reinforcing member (4a) for, the problem of causing excessive demands of work time and increase in manufacturing cost remained.

Accordingly, the present invention has been made to solve all the above problems, it is generated by the RPM during engine operation without changing the size and hardness of the bush coupled to the cross member and the bush coupled to the assembly of the engine and the transmission By using the rear roll stopper made of fluid-enclosed dampers to effectively attenuate vibration and noise in a wide frequency range, the vehicle's NVH performance can be improved by improving overall durability and minimizing vibration and noise transmission to the body. The purpose is to provide a rear roll stopper for the vehicle.

In addition, the present invention can prevent the durability of the cross member is not weakened even without mounting the reinforcing member to the cross member, and also the removal of the reinforcing member can reduce the working time and manufacturing cost of the automobile The purpose is to provide a rear roll stopper.

The present invention for achieving the above object, the first mounting bushing member is bolted and mounted to a predetermined portion of the engine and the transmission assembly facing the rear of the vehicle body, and the second mounting bushing member bolted to the cross member And a fluid-enclosed cylinder member having one end coupled to the first mounting bushing member and the other end facing toward the second mounting bushing member, and one end coupled to the second mounting bushing member and the other end of the cylinder. A piston member and a piston rod member installed in the member to guide linear movement of the cylinder member when the assembly of the engine and the transmission has a movement to rotate about a torque roll shaft, and a piston rod member located in the cylinder member. The both ends are installed so as to be fixed to the piston rod seat and the inner cylinder seat, respectively, The first elastic member is elastically compressed and deformed when the lining member is moved toward the assembly of the engine and the transmission, and is elastically deformed when moving to the cross member, and one end is fixed to the outer cylinder seat and the other end is fixed to the cross member seat. When the cylinder member is moved toward the assembly of the engine and the transmission is characterized in that it is composed of a second elastic member that is elastically deformed elastically and compressive deformation when moved toward the cross member.

1 is a perspective view illustrating an installation structure of an engine and a transmission assembly having a three-point mounting support structure;

2 is a side view for explaining a conventional rear roll stopper;

3 is a rear view for explaining a cross member equipped with a conventional rear roll stopper;

4 is a longitudinal sectional view for explaining a rear roll stopper according to the present invention.

<Description of Symbols for Main Parts of Drawings>

4-Crossmember 4b-Crossmember Seat

11-first mounting bushing member 12-second mounting bushing member

13-Cylinder Member 13a-Cylinder Inner Sheet

13b-Cylinder Outer Seat 14-Piston Member

15-Piston Rod Member 15a-Piston Rod Seat

16-1st elastic member 17-2nd elastic member

E-Engine S-Torque Roll Shafts

T-transmission

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

Figure 4 is a longitudinal cross-sectional view for explaining the rear roll stopper according to the present invention, will be described with the same reference numerals to the same parts as the conventional structure.

The rear roll stopper according to the embodiment of the present invention is a cross that constitutes a predetermined portion and suspension of the engine and transmission assembly facing the rear side of the vehicle body when the assembly of the engine and the transmission is installed in the engine room using a three-point mounting support structure. By connecting predetermined portions of the members to each other to minimize the transmission of vibration and noise generated during engine driving toward the vehicle body.

That is, the three-point mounting support structure of the engine E and the transmission T assembly is installed in the engine room via the subframe by the assembly of the engine E and the transmission T as described above with reference to FIG. 1. When the engine (E) is installed to be connected to the vehicle body via the engine mounting stopper (1), the transmission (T) is installed to be connected to the vehicle body via the transmission mounting stopper (2), the rear side of the vehicle body Predetermined portions of the engine E and the transmission T assembly facing to each other are connected to the cross member 4 constituting the suspension of the vehicle via the rear roll stopper 10 of the present invention described later. .

When the assembly of the engine E and the transmission T is installed 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.

Here, 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) to the vehicle body.

On the other hand, as described above, the rear roll stopper according to the present invention, 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 and the cross member (4) ( 10, as shown in FIG. 4, the first mounting bushing member 11, which is bolted and mounted to a predetermined portion of the engine E and the transmission T assembly facing the rear of the vehicle body, and the cross member 4. The second mounting bush member 12 is bolted to the mounting and one end is coupled to the first mounting bush member 11 and the other end is installed so that the other end toward the second mounting bushing member (12) The enclosed cylinder member 13 and one end thereof are coupled to the second mounting bushing member 12 and the other end thereof is installed in the cylinder member 13 such that the assembly of the engine E and the transmission T is a torque roll shaft. The cylinder member 13 when it has a movement to rotate about (S) The piston member 14 and the piston rod member 15 for guiding the linear movement of the rod, and the piston rod seat 15a and the inside of the cylinder are positioned in the cylinder member 13 to surround the piston rod member 15 In addition to being fixed to the seat (13a) respectively, the cylinder member 13 is elastically deformed when moved toward the assembly of the engine (E) and the transmission (T) and tensilely deformed when moved toward the cross member (4) The first elastic member 16 and one end is fixed to the outer cylinder sheet 13b and the other end is fixed to the cross member seat 4b so that the cylinder member 13 is connected to the engine E and the transmission T. It is composed of a second elastic member 17 which is elastically deformed when moved toward the assembly and compressively deformed when moved toward the cross member 4.

Here, the first elastic member 16 has one end fixed to the cylinder inner sheet 13a and the other end fixed to the piston rod seat 15a are formed in the same size as their diameters, as well as the intermediate portions at both ends. The diameter of the structure is gradually formed in a jar shape that gradually widens.

As such, the reason why the first elastic member 16 is formed in a jar shape is due to the vibration generated when the assembly of the engine E and the transmission T has a movement to rotate about the torque roll shaft S. This is to effectively damp the vibrations with relatively small force of magnitude.

In addition, the inner diameter of the cylinder member 13 has a structure that is always formed to be spaced apart from the first elastic member 16 irrespective of the tension or compression action of the first elastic member 16. .

That is, the first elastic member 16 is formed in a jar shape in which the intermediate portion is gradually widened as described above so that the cylinder member 13 can be moved toward the assembly of the engine E and the transmission T. At this time, the diameter of the middle portion is increased (larger), but the inner diameter of the cylinder member 13 is formed to have a diameter larger than the diameter of the middle portion of the first elastic member 16. The first elastic member 16 has no friction interference with the inner diameter of the cylinder member 13 regardless of the tension or compression action.

Therefore, the assembly of the engine E and the transmission T rotates forward and backward around the torque roll shaft S when the start-up is ON / OFF, when the vehicle is traveling, or when the rapid start and sudden stop are performed. When having a rolling motion, the rear roll stopper 10 according to the present invention includes a damping force of the first and second mounting bushing members 11 and 12 and a damping force and frictional force of the fluid. The damping force generated by the tension and compression action of the first and second elastic members 16 and 17 is generated at the same time, and this damping force is the most of the vibration generated during the rolling motion of the engine E and the transmission T assembly. Can be effectively attenuated.

That is, the rear roll stopper 10 according to the present invention is capable of effectively attenuating the vibration of a wide range of frequency bands generated for each RPM during engine driving, thereby vibrating than the conventional rear roll stopper 3 described above with reference to FIG. 2. Attenuation performance and noise reduction are greatly improved.

In addition, through the rear roll stopper 10 according to the present invention almost no vibration transmission to the vehicle body, there is an advantage that the NVH performance of the vehicle is improved by that much.

In addition, when the rear roll stopper 10 according to the present invention is used, the vibration attenuation performance and the noise reduction function are greatly improved as compared with the prior art, thereby minimizing the transmission to the cross member 4, and thus the cross member ( Even if the reinforcing member (4a) attached to the 4) is removed almost does not affect the durability of the cross member (4), the rear roll stopper 10 according to the present invention can help to reduce the weight of the vehicle body, In addition, there is an advantage that can help to reduce the working time and manufacturing cost.

In addition, the rear roll stopper 10 according to the present invention is the first and second mounting bushing member 11, depending on the size of the cylinder member 130 and the elastic force control of the first and second elastic members 16, 17, the fluid is sealed Since there is an advantage that the size of 12) can be freely adjusted, there is also an advantage that the design freedom of the peripheral parts is increased when the first and second mounting bushing members 11 and 12 are mounted.

As described above, the rear roll stopper according to the present invention can effectively attenuate vibration and noise in a wide frequency range generated by RPM during rolling motion of the engine and transmission assembly, thereby minimizing vibration and noise transmission to the vehicle body. In addition to improving the NVH performance of the vehicle, it is also effective to help reduce the weight and manufacturing cost of the vehicle body.

Claims (2)

The first mounting bushing member 11 bolted to a predetermined portion of the engine E and the transmission T assembly facing the rear of the vehicle body, and the second mounting bushing member bolted to the cross member 4. (12), and one end is coupled to the first mounting bushing member 11 integrally and the other end is a fluid-filled cylinder member 13 is installed so as to face the second mounting bushing member 12, one end It is coupled to the second mounting bushing member 12 and the other end is installed to be located in the cylinder member 13 so that the assembly of the engine E and the transmission T has a movement to rotate about the torque roll shaft S. When the piston member 14 and the piston rod member 15 for guiding the linear movement of the cylinder member 13 and the piston rod seat 15 is located in the cylinder member 13, both ends of the piston rod seat 15a and the cylinder inner sheet 13a, respectively, to be fixed and installed When the cylinder member 13 is moved toward the assembly of the engine E and the transmission T, the first elastic member 16 which is elastically deformed and deformed when moved toward the cross member 4, and once Is fixed to the outer cylinder seat (13b) and the other end is installed to be fixed to the cross member seat (4b) is elastically deformed when the cylinder member 13 is moved toward the assembly of the engine (E) and the transmission (T) The rear roll stopper of a vehicle, which is composed of a second elastic member 17 which is deformed when moved toward the cross member 4. The rear roll stopper of claim 1, wherein the first elastic member (16) is formed in a jar shape in which the diameter of the first elastic member (16) is gradually widened from both ends to the middle portion.