KR100435730B1 - a insulator of roll rod in a vehicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll rod insulator of an automobile, wherein a piston 12 is formed of a soft rubber at the end of the roll rod 11, the piston 12, the separator plate 13, and the separator plate 13. ) And the bellows 14 form the front oil chamber 21 and the rear oil chamber 22. A pressure chamber 23 is formed on the rear side of the housing 10 by the pressure plate 17. One end of the movable member 15 is fixed to the valve member, and the other end of the movable member 15 is positioned in the front oil chamber 21 and opens and closes an oil passage 13a formed in the separation plate 13. On the other hand, the pressure chamber 23 is connected to the intake surge tank 30 via a tube 31, and the negative pressure supply of the intake surge tank 30 steps on the accelerator pedal 33. It has a structure made of.

Therefore, in the normal state, since the hydraulic oil is freely moved through the oil passage 13a, noise and vibration are absorbed by the damping action of the rubber of the piston 12 only, and the valve plate 16 is oil passage during rapid acceleration. Since the front oil chamber 21 is sealed by blocking the 13a and the working oil acts as an inelastic material, the damping rigidity in the front and rear directions is improved, thereby reducing shock and jerk.

Description

Roll insulator of a vehicle {a insulator of roll rod in a vehicle}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll rod insulator of a vehicle, and more particularly, to a roll rod insulator of a vehicle that can achieve both a vibration damping performance of a vehicle and reduction of shock and jerk during sudden acceleration and deceleration. .

In general, the power plant of the vehicle, that is, the engine and the transmission are connected to each other and behaves in the same state when driving the vehicle.

That is, as shown in Figs. 1 and 2, which are a plan view and a side view of the power plant, the engine main mount 2 and the transmission main mount 3 are installed on the inertia spindle 1 to stabilize the weight of the power plant. It is possible to reduce rolling caused by torque fluctuations of the engine and turning by connecting the vehicle body using the roll rod 4.

On the other hand, the shock amount due to the vibration in the roll direction is called shock (shock), the vibration that the vehicle waggles in the front and rear direction after the shock is called a jerk (jerk), as shown in the graph of FIG. ) Is shock, and then the size is reduced, but the excitation of 3-8 Hz is jerk.

On the other hand, since the shock and jerk can be felt directly by the driver while driving, it becomes an important factor for the driver to evaluate the performance and quality of the vehicle, and thus has a great influence on the merchandise of the vehicle.

Accordingly, as illustrated in FIGS. 4 and 5, the insulator 5 including the shaft fixed to the vehicle body and the inner wall portion of the housing are made of rubber 6, as shown in FIGS. 4 and 5. In order to reduce the shock and jerk, and to improve the noise vibration performance (NVH).

On the other hand, in order to improve the noise and vibration performance, the damping rigidity of the insulator 5 should be small so as to be advantageous in absorbing vibrations and noises transmitted from the power plant to the vehicle body side, whereas in order to reduce shock and jerk, the front and rear directions of the power plant are reduced. The damping stiffness must be large to favor the behavior.

However, since the rubber 6 of the insulator 5 has a constant elastic value given at the time of manufacture, there is a limit in improving the noise and vibration performance of the vehicle while reducing shock and jerk.

Therefore, the present invention has been invented in view of the above-mentioned point. First, when the shock and jerk are sensitive, that is, the damping stiffness is increased during rapid acceleration, it is possible to suppress the forward and backward flow of the power plant. In this case, it is an object of the present invention to provide a roll rod insulator of a vehicle, which is advantageous in reducing damping stiffness to reduce noise and vibration.

1 is a plan view of a power plant in an engine room of a vehicle;

2 is a side view of the power plant,

3 is a graph showing the vibration generated in the vehicle during the engine acceleration,

4 is an insulator side view of a power plant roll rod of a conventional vehicle;

5 is a plan view of the insulator,

6 is a block diagram of a roll rod insulator and a pneumatic system connected to the insulator according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: inertia spindle, 2: engine main mount,

3: transmission main mount, 4: roll rod,

5: insulator, 6: rubber,

10: housing, 11: roll rod,

12: piston, 13: separator,

13a: oil passage, 13b: inclined surface,

14: bellows, 15: moving member,

16: valve plate, 16a: inclined surface,

17: pressure plate, 21: front chamber,

22: rear chamber, 23: pressure chamber,

30: intake surge tank, 31: tube,

32: chamber, 32a: connector,

32b: open tube, 33: accelerator pedal,

34: wire, 35: switching valve,

36: Return spring.

The present invention for achieving the above object, the housing which is fixed to the vehicle body, the piston is surrounded by the end of the roll rod inserted into one side of the housing and the separation of the oil passage is formed while blocking the central portion of the housing A moving member including a plate, a bellows sealing the right space of the separating plate, a valve plate installed through the bellows to open and close the oil passage at one end thereof, and the other end of the moving member to the inner wall of the housing. It consists of a pressure plate which is fixed fluidly and forms a pressure chamber together with the wall of the housing, the space between the piston and the bellows is filled with hydraulic oil, the pressure chamber is connected to an intake surge tank opened by an accelerator pedal operation, The space between the pressure chamber and the bellows is opened to the atmosphere through the air hole.

Therefore, in the normal state, the hydraulic fluid is freely moved through the oil passage, so noise and vibration are absorbed by the damping action of the piston rubber only.In the case of rapid acceleration, the valve plate blocks the oil passage so that the front oil chamber is sealed and the hydraulic fluid is inelastic. Since it acts as a sieve, the damping stiffness in the front and rear direction is improved to reduce the shock and jerk.

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

6 is a configuration diagram of an insulator of a roll rod and a pneumatic system connected to the insulator according to the present invention.

In the present invention, the housing 10 of the insulator is fixed to the vehicle body, and the end of the roll rod 11 connected to the power plant is inserted into one side, and the end of the roll rod 11 has a smaller rigidity than the rubber of the conventional insulator. The piston 12 is made of a rubber having a.

A separating plate 13 having an oil passage 13a is formed at the center of the rear portion of the piston 12, that is, the inner central portion of the housing 10, and the bellows 14 is formed at the rear portion of the separating plate 13. ) Is installed to form a sealed space together with the piston 12, and the sealed space is filled with working oil. (In the following description, the piston 12 and the separating plate 13, which are the front space of the separating plate 13). The space between the front oil chamber 21 and the space between the separating plate 13 and the bellows 14, which is a space behind the separating plate 13, will be referred to as the rear oil chamber 22.)

A pressure chamber 23 through which negative pressure flows from the intake surge tank 30 to be described later is formed by a pressure plate 17 made of rubber at a rear portion of the housing 10, and the bellows 14 is formed on the pressure plate 17. The rear end of the movable member 15, which is installed in a state penetrating and movable back and forth within the housing 10, is fixed, and the front end of the movable member 15 is located in the front oil chamber 21 and is made of rubber. The valve plate 16 is installed.

On the other hand, the space between the bellows 14 and the pressure plate 17 is open to the atmosphere through the air hole (10a) formed in the housing 10, the pressure chamber 23 is the suction pressure through the tube (31) Is connected to an intake surge tank 30 which provides a chamber 32 having a connection tube 32a connected to the intake surge tank 30 and an open tube 32b open to the atmosphere. Is installed, is connected to the accelerator pedal 33 in the interior of the chamber 32 by the wire 34 is stepped on the accelerator pedal 33 is rotated to open the connecting pipe (32a) connected to the intake surge tank 30 And the open pipe 32b opened to the atmosphere is provided with a switching valve 35 for blocking, the switching valve 35 is provided with a return spring (36).

The operation and effects of the present invention will now be described.

In the non-accelerated vehicle, since the switching valve 35 blocks the connecting pipe 32a, the negative pressure of the intake surge tank 30 does not act on the pressure chamber 23 through the tube 31 and the pressure chamber 23 Becomes atmospheric pressure.

Therefore, since the contraction of the pressure plate 17 does not occur, the movable member 15 is held in place without a change in position, and the valve plate 16 also opens the oil passage 13a of the separator plate 13.

Therefore, since the oil is freely movable through the oil passage 13a, the oil filled in the front oil chamber 21 and the rear oil chamber 22 has no effect on the elastic action of the piston 12, and thus Absorption of noise and vibration by the piston 12 takes place.

Here, the rubber of the piston 12 is made of a rubber having a small rigidity as compared to the rubber of the conventional insulator as described above, so that the absorption performance of the noise and vibration transmitted in the up and down direction has been adopted a conventional insulator Better than ever.

On the other hand, when the driver accelerates the vehicle by stepping on the accelerator pedal 33, the switching valve 35 is pulled and rotated through the wire 34, whereby the connecting pipe 32a connected to the intake surge tank 30 is connected. While open tube 32b is closed.

Therefore, the negative pressure of the intake surge tank 30 acts on the pressure chamber 23, thereby lowering the pressure of the pressure chamber 23, whereby the pressure plate 17 contracts, and the movable member 15 of the housing 10 is removed. The front oil chamber 21 is closed by moving backward and closing the oil passage 13a of the separating plate 13 by the valve plate 16.

Typically, the fluid is incompressible, and the front oil chamber 21 is completely filled with hydraulic fluid therein, so that the piston 12 is hardly pulled forward or pushed backward.

In other words, the front and rear stiffness of the insulator is greatly improved, and thus, it is possible to more firmly hold the flow in the front and rear directions due to the power train rolling, thereby reducing the jerk, which is a phenomenon in which the vehicle flickers in the front and rear directions.

In addition, immediately after the foot is lifted from the accelerator pedal 33 in the acceleration state as described above, the return valve 36 returns to the original position by the return spring 36, and the opening tube 32b is opened and the connecting tube 32a is opened. As the air is introduced into the pressure chamber 23 by being closed, the movable member 15 moves forward. At this time, the inclined surface 13b around the separation plate 13 and the oil passage 13a and the inclined surface of the valve plate 16 ( As the oil passing area is gradually widened as 16a) falls, the damping stiffness of the insulator is gradually dropped, and thus, it is advantageous to reduce the jerk generated during deceleration immediately after acceleration.

After that, when the oil passage 13a of the separating plate 13 is completely opened, only the low damping stiffness of the rubber constituting the piston 12 acts on the roll rod 11 as in the initial idle state, so that the noise and vibration performance are improved. Will be improved.

As described above, according to the present invention, a low damping stiffness is applied to the up and down vibration of the vehicle to improve the noise and vibration of the vehicle, and a high damping stiffness is applied to the forward and backward vibration due to the rapid acceleration and deceleration, such as shock or jerk. There is an effect that can be reduced.

Claims (5)

A housing 12 fixed to the vehicle body, a piston 12 formed of a low rigid rubber surrounded by an end of the roll rod 11 inserted into one side of the housing 10, and a central portion of the housing 10 is blocked. In addition to the piston 12 to form a front oil chamber 21, the separator 13 and the oil passage (13a) is formed in the center, and the right side space of the separation plate 13 to seal the rear oil chamber 22 A moving member 15 provided with a bellows 14 to be formed, a valve plate 16 installed through the bellows 14 and opening and closing the oil passage 13a at one end thereof; Rolled insulator of a vehicle consisting of a pressure plate (17) for fluidly fixing the other end to the inner wall of the housing (10) and forming a pressure chamber (23) together with the wall surface of the housing (10). The pressure chamber (23) is connected to the intake surge tank (30) via a tube (31). The chamber (32) is provided at the end of the tube (31). The connecting pipe 32a is connected to the intake surge tank 30, the open pipe 32b is opened to the atmosphere, and the chamber 32 is connected to the connecting pipe 32a and the open pipe by operating the accelerator pedal 33. Roll rod insulator of a vehicle, characterized in that the structure is provided with a switching valve (35) to relatively open or close (32b). The switching valve (35) according to claim 2, wherein the switching valve (35) is connected to the accelerator pedal (33) with a wire (34) to open the connecting pipe (32a) and close the open pipe (32b) when the accelerator pedal (33) is pressed. And, when the accelerator pedal 33 is released, is returned by the return spring 36 to close the connecting pipe 32a and open the opening pipe 32b. 2. The roll rod insulator of claim 1, wherein the space between the bellows (14) and the pressure plate (17) is opened to the atmosphere by an air hole (10a) formed in the housing (10). 2. The inclined surfaces 13b and 16a of claim 1, wherein the oil valves 13a and the valve plates 16 of the separating plate 13 are in close contact with each other when the valve plate 16 blocks the oil passages 13a. Roll insulators for automobiles, each of which is formed.