KR100759931B1 - Vehicle height adjustment damper device - Google Patents

Abstract

The present invention relates to a height adjustment damper device of a vehicle.

According to the present invention, a pressure variable valve installed at one side of an outer cylinder includes a valve housing communicating with a gas chamber; A spool which slides up and down inside the valve housing; A spring installed on a lower surface of the spool; It is characterized in that the accumulator is in communication with one side of the valve housing is filled with nitrogen gas. Therefore, by installing a pressure variable valve on one side of the damper, it is possible to prevent the inclination of the vehicle during cornering of the vehicle or when driving on a curved road, thereby improving driving stability and riding comfort.

Description

Vehicle height control damper device {VEHICULAR HEIGHT CONTROL DAMPER DEVICE}

1 is a cross-sectional view showing a conventional vehicle height adjustment damper device,

2 is a cross-sectional view showing a height adjustment damper device of a vehicle according to the present invention,

3 is a cross-sectional view showing the operation of the pressure variable valve according to the present invention.

<Description of the code | symbol about the principal part of drawing>

10: inner cylinder 11: rod guide

13: rebound chamber 14: compression chamber

20: piston rod 21: pump tube

22: pump rod 23: inlet valve

24 outlet valve 25 pump chamber

30: piston valve 40: base valve

50: outer cylinder 60: base chamber

70 gas chamber 80 high pressure chamber

90: pressure variable valve 91: valve housing

92: accumulator 93: first flow path

94: second euro 95: third euro

96: fourth euro 97: spool                 

98: spring

The present invention relates to a height control damper device of the vehicle, and more particularly, is installed between the vehicle body and the axle of the driving vehicle to attenuate the external vibration received from the road surface and at the same time the vehicle body vibration during driving regardless of the load of the vehicle And a height adjustment damper device capable of automatically controlling the height of the vehicle according to a set level.

In general, shock absorbers are provided between the axle and the body to prevent vibration or shock received from the road surface of the vehicle to absorb vibrations and shocks, thereby improving ride comfort. The interior of the shock absorber may increase damping force. Fills such as gas and oil are filled.

However, in a vehicle carrying a relatively large number of passengers or cargo, the garage is changed according to a large or small number of passengers or luggage, and the change in height of the vehicle reduces ride comfort and steering stability. Therefore, the shock absorber is also required to maintain a constant height of the car, regardless of the load change of the car.

Referring to the attached damper to adjust the height of the conventional vehicle as follows.

1 is a cross-sectional view showing a conventional vehicle height adjustment damper device. As shown, the inner cylinder 10, the rod guide 11, the piston rod 20, the piston valve 30 and the base valve 40 assembled to the inner cylinder 10 to adjust the height of the vehicle And an inlet valve provided at the pump tube 21 and the pump rod 22 installed in the hollow hole of the piston rod 20, one end of the pump rod 22 and one end of the pump tube 21. 23 and the outlet valve 24, the outer cylinder 50 located outside the inner cylinder 10, the base chamber 60 and the gas chamber formed between the inner cylinder 10 and the outer cylinder 20. 70 and a high pressure chamber 80.

The inner cylinder 10 has one end of the piston rod 20 is inserted into the oil filled inside, the upper end is sealed by the rod guide 11 and the oil seal 12 fitted to the piston rod 20.

The piston rod 20 is equipped with a pump tube 21 in the hollow formed inside to adjust the height of the vehicle, the hollow pump rod 22 is inserted into the pump tube 21 is inserted into the pump chamber ( 25 is formed, the inlet valve 23 is provided at the end of the pump rod 22, the outlet valve 24 is provided at one end of the pump tube 21 to open and close by the up and down operation of the piston rod 20. An oil passage 26 is formed between the piston rod 20 and the pump tube 21.

In addition, the piston rod 20 has a vehicle mounting portion 27 is formed on the upper end, the piston valve 30 is coupled to one end inserted into the inner cylinder (10).

The piston valve 30 divides the inside of the inner cylinder 10 up and down into the rebound chamber 13 and the compression chamber 14, and the rebound chamber is connected to the body 31 coupled to one end of the piston rod 20. An orifice 32 is provided between the 13 and the compression chamber 14 to provide a path of oil, and the piston valve 30 is provided with a disk 33 for blocking the orifice 32, and the disk 33 is When the disk 33 is fixed to the retainer 34 and the disk 33 resists the flow of oil to form a pressure difference, the disk 33 which blocks the orifice 32 is eventually flipped and the oil flows.

The base valve 40 is installed at the lower end of the inner cylinder 10 and has a first flow path providing a path to the pump chamber 25 and the base chamber 60 through the hollow 22a of the pump rod 22 therein. 41 and a second flow passage 42 providing a path to the compression chamber 14 and the high pressure chamber 80 are formed.

The outer cylinder 50 has a base chamber in which an inner cylinder 10 is inserted inside, an upper end thereof is sealed by a packing case 51 and a cap 52, and an oil is filled between the inner cylinder 10 ( 60 and the gas chamber 70 and the high pressure chamber 80 which are bisected by the separator 71 are provided, respectively. The high pressure chamber 80 is pressurized by the gas chamber 70.

In the rebound stroke of the height adjustment damper device of the conventional vehicle configured as described above, oil of the rebound chamber 13 and the base chamber 60 flows into the compression chamber 14, and the pump tube 21 and the pump rod 22 are provided. The low pressure side oil is sucked into the working volume, that is, the pump chamber 25.

During the compression stroke, the oil in the compression chamber 14 flows into the rebound chamber 13 and the high pressure chamber 80, at which time the oil in the pump chamber 25 is pumped into the high pressure chamber 80. Then, when the pumping progresses to the high pressure side, a pressure rise occurs due to the compression of the gas to raise the position of the piston valve 30 to adjust the garage.

However, when the vehicle equipped with the height control damper device is leveled while the vehicle is driving and the height is increased, the leveled pressure is released when cornering or driving on a curved road, and both sides of the vehicle body are inclined or tilted only on one side. The phenomenon occurred, driving stability and ride comfort was significantly reduced.

The present invention is to solve the conventional problems as described above, by installing a pressure variable valve on one side of the damper, the height of the vehicle that can prevent the inclination of the vehicle when cornering the vehicle or driving on a curved road The purpose is to provide an adjustable damper device.

In order to achieve the above object, the present invention is installed in the inner cylinder, the rod guide, the piston rod, the piston valve and the base valve assembled to the inner cylinder, and the hollow hole of the piston rod to adjust the height of the vehicle A pump tube and a pump rod, an inlet valve and an outlet valve provided at one end of the pump rod and one end of the pump tube, an outer cylinder positioned outside the inner cylinder, and a base chamber formed between the inner cylinder and the outer cylinder, A height adjusting damper device for a vehicle including a gas chamber and a high pressure chamber, the pressure variable valve being installed in parallel on one side of the outer cylinder, the valve housing communicating with the gas chamber; A spool which slides up and down inside the valve housing; A spring installed on a lower surface of the spool; Provided is a height control damper device of the vehicle characterized in that the accumulator is in communication with one side of the valve housing is filled with nitrogen gas.

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

Figure 2 is a cross-sectional view showing a height adjustment damper device of the vehicle according to the invention, Figure 3 is a cross-sectional view showing the operation of the pressure variable valve according to the present invention.

The same member as FIG. 1 is demonstrated using the same code | symbol.

The height adjustment damper device of the vehicle according to the present invention is as shown in FIG. 2.

Hollow hole of the inner cylinder 10, the rod guide 11, the piston rod 20, the piston valve 30 and the base valve 40, and the piston rod 20 assembled to the inner cylinder 10 Pump tube 21 and pump rod 22, inlet valve 23 and outlet valve 24 provided at one end of pump rod 22 and one end of pump tube 21, inner cylinder It consists of an outer cylinder 50 located in the outer side of 10, the base chamber 60 formed between the inner cylinder 10 and the outer cylinder 20, the gas chamber 70, and the high pressure chamber 80. .

In the above configuration, a pressure variable valve 90 is installed at one side of the outer cylinder 50 so as to communicate with the gas chamber 70.

Here, the pressure variable valve 90 is composed of a valve housing 91 and an accumulator 92, and a first flow path is provided at one side of the valve housing 91 at upper and lower portions for communication with the gas chamber 70. 93 and a second flow path 94 are provided, and the third flow path 95 at a position symmetrical with the first flow path 93 and the second flow path 94 for communication with the accumulator 92 on the other side. And a fourth flow path 96, wherein the first, second and fourth flow paths 93, 94, and 96 are formed in communication with the side surface of the inner space of the valve housing 91, and the third flow path 95. Is formed in communication with the upper surface of the inner space portion of the valve housing 91.

And the spool 97 which can slide up and down is provided in the inner space part of the valve housing 91 which each flow path passes, and the spring 98 is provided in the lower surface of the spool 97. As shown in FIG.

On the other hand, the accumulator 92 which communicates with the 3rd flow path 95 and the 4th flow path 96 is gas-filled, and has a drum-shaped structure.

Operation of the height adjustment damper device of a vehicle according to the present invention configured as described above is as follows.

Referring back to FIG. 2, first, as the piston valve 30 reciprocates in the inner cylinder 10, a pressure difference is formed between the rebound chamber 13 and the compression chamber 14, so that oil is separated from the piston valve 30. It flows through the base valve 40 and starts pumping through the pump tube 21 and the pump rod 22.

That is, during the rebound stroke, oil of the rebound chamber 13 and the base chamber 60 flows into the compression chamber 14, and the low pressure side oil is sucked into the pump chamber 25. During the compression stroke, the oil in the compression chamber 14 flows into the rebound chamber 13 and the high pressure chamber 80, at which time the oil in the pump chamber 25 is pumped into the high pressure chamber 80. Then, when the pumping progresses to the high pressure side, a pressure rise occurs due to the compression of the gas to raise the position of the piston valve 30 to adjust the garage.

In this way, the vehicle is kicked and adjusted, but the leveling pressure is released by cornering or driving on a curved road. At this time, in the pressure regulating valve 90, the oil of the leveled high-pressure chamber 80 is released and the gas chamber 70 is expanded. In order to level the high pressure chamber 80 again, the nitrogen gas in the expanded gas chamber 70 pushes the spool 97 upward through the second flow path 94 and accumulates through the fourth flow path 96. Inflow to (92).

3, the gas chamber 70 is relatively compressed by the separator 71 while the high pressure chamber 80 is filled in the compression stroke. At this time, the nitrogen gas of the accumulator 92 moves out of the third flow path 95 to move the spool 97 downward and compress the spring 98. Nitrogen gas may be supplemented with the gas chamber 70 through the first flow path 93 to maintain the leveled state of the high pressure chamber 80 as before.

In this manner, the pressure variable valve 90 separately installed outside the damper prevents the vehicle from temporarily tilting when the vehicle is cornered or when driving on a curved road.

Although the present invention has been illustrated and described with respect to certain preferred embodiments, the present invention is not limited to the above-described embodiments, and a person skilled in the art to which the present invention pertains has the present invention set forth in the claims below. Various modifications may be made without departing from the spirit of the invention.

As described above, the height adjustment damper device of the present invention further includes a pressure variable valve at one side of the damper, thereby preventing the vehicle from tilting when cornering the vehicle or driving on a curved road, thereby improving driving stability and riding comfort. It is effective.

Claims (1)

To adjust the height of the vehicle, the inner cylinder, rod guides, piston rods, piston valves and base valves assembled to the inner cylinders, pump tubes and pump rods installed in the hollow holes of the piston rods, Height of a vehicle including an inlet valve and an outlet valve provided at one end and one end of the pump tube, an outer cylinder positioned outside the inner cylinder, and a base chamber, a gas chamber, and a high pressure chamber formed between the inner cylinder and the outer cylinder. In the adjustable damper device, The pressure variable valve installed in parallel on one side of the outer cylinder, the valve housing in communication with the gas chamber; A spool which slides up and down inside the valve housing; A spring installed on a lower surface of the spool; It is made of an accumulator in communication with one side of the valve housing is filled with nitrogen gas, Here, one side of the valve housing is provided with a first flow path and a second flow path at upper and lower portions, respectively, for communication with the gas chamber, and at the other side, the first flow path and the first flow path for communication with the accumulator. A third flow path and a fourth flow path are formed at positions symmetrical with the second flow path, and the first, second and fourth flow paths are formed in communication with the side surface of the inner space of the valve housing, and the third flow path is connected to the valve. A height control damper device for a vehicle, characterized in that formed in communication with the upper surface of the inner space of the housing.

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