KR20000016692U - Heat-reducing apparatus for suspension unit - Google Patents

Abstract

The present invention relates to an apparatus for reducing heat of an organic pressure suspending device, and more particularly, to an apparatus for reducing heat of an organic pressure suspending device that can reduce heat generated from a damper when driving a vehicle.

The present invention for achieving the above object is an orifice connected to one end of the operation cylinder is connected to the pressure cylinder at the other end, two relief valves connected in parallel with the orifice in a different direction, and connected in parallel to the relief valve In the case of a predetermined pressure or more, two bypass valves operated to prevent passage of the hydraulic oil and the check valves are connected to the bypass valves in series so as to move the hydraulic oil only in one direction.

Description

Heat-reducing apparatus for suspension unit

The present invention relates to an apparatus for reducing heat of an organic pressure suspending device, and more particularly, to an apparatus for reducing heat of an organic pressure suspending device that can reduce heat generated from a damper when driving a vehicle.

In general, a large amount of heat is generated because a shock absorber using hydraulic pressure acts to damp vibration of a vehicle. When the temperature of the damper rises, many undesirable phenomena such as deterioration of damping characteristics due to the decrease of viscosity of hydraulic oil and deterioration of durability life of damper and related internal seals occur. There is a need for a device to minimize the increase.

1 is a perspective view of an organic pressure suspending device for tanks according to the prior art, FIG. 2 is a cross-sectional view of a cylinder block which is a part of the organic pressure suspending device for tanks according to the prior art, and FIG. Figure 4 is a perspective view of a mount which is a component of the organic pressure suspending device for the tank, Figure 4 is a hydraulic circuit diagram of a damper according to the prior art, Figure 5 is a graph showing the pressure according to the flow rate of the damper.

In the conventional prior application (Domestic Patent Application No. 98-026395), an organic pressure suspension device for a tank is rotatably connected to the housing block 10 by a shaft as shown in FIGS. 1 to 3. The housing block 10 is rotatably connected to the mount 20 which is bolted to the vehicle body.

In addition, as shown in FIG. 2, the upper lower cylinders 16 and 17 are formed in the housing block 10, a crank 11, a connecting rod 12 connected to one end of the crank 11, and A piston 13 connected to the other end of the connecting rod 12, a damper 14 connected to the upper lower cylinders 16 and 17, and a float piston 15 provided in the lower cylinder 17 are provided. . In addition, the crank 11 is provided with a spline 11a, and the mount 20 is provided with a mount spindle 21 having a spline 21a connected to the mount 20 and the crank 11. .

In the above, the housing block 10 is rotated upwardly around the mount spindle 21 as the weight of the bogie wheel 1 is moved to the upper side when the tank is driven, and thus the piston 13 ) Is compressed, the fluid of the upper cylinder 16 is compressed and moved to the damper 14, and then to the lower cylinder 17 to compress the float piston 15 to compress the lower cylinder (17) ) And the nitrogen gas 18 filled between the float cylinder 15 is compressed. At this time, when the nitrogen gas 18 is compressed, it is in a jounce state.

On the contrary, when the bogie wheel 1 is lightly loaded, nitrogen gas 18 pushes the float piston 18, thereby causing the piston 13 of the upper cylinder 16 to be pushed back to its original position. By returning, the housing block 10 and the bogie wheel 1 are returned to their original positions. At this time, the state becomes a rebound state.

In the above, the damper 14 is composed of two relief valves 14a and one orifice 14b connected to the upper and lower cylinders 16 and 17, as shown in FIG. That is, when the tank is driven, the hydraulic oil is moved through the relief valve 14a when the damper 14 is above a certain pressure. When the tank is below a certain pressure, the relief valve 14a is closed to close the orifice 14b. It is configured to move the fluid through.

However, in the conventional organic pressure suspension device, as shown in FIG. 5, as the suspension device moves up and down even in a terrain condition in which the vibration of the vehicle is not generated, the hydraulic oil is applied to the orifice 14b inside the damper 14. Since the heat is generated, such heat generation continues to accumulate, resulting in a decrease in damping characteristics due to a decrease in viscosity of the hydraulic oil and a decrease in durability of the damper 14 and related internal parts.

The present invention is devised to solve the problems of the prior art, the damping force by installing a device for opening and closing the hydraulic oil does not pass through the orifice at a constant pressure or less under a certain pressure in the terrain that does not generate much vibration In this case, it is possible to prevent unnecessary temperature increase in the organic pressure suspending device by passing hydraulic oil inside the damper, and to provide a heat generation reduction device of the organic pressure suspending device, which improves the life of internal components.

1 is a perspective view of an organic pressure suspension device for a tank according to the prior art,

Figure 2 is a cross-sectional view of a cylinder block which is a part of the organic pressure suspension device for tanks according to the prior art,

3 is a perspective view of a mount which is a part of the organic pressure suspension device for tanks according to the prior art,

4 is a hydraulic circuit diagram of a damper according to the prior art;

5 is a graph showing the pressure according to the flow rate of the damper,

6 is a hydraulic circuit diagram of the organic pressure suspension damper according to the present invention,

7 is a cross-sectional view of the heat generating device according to the present invention,

8 is a graph showing the damping pressure according to the flow rate of the organic pressure suspension device according to the present invention.

<Explanation of symbols on main parts of the drawings>

50: working cylinder 51: first relief valve 60: pressure storage cylinder

61: second relief valve 70: orifice 80: first bypass valve

80a: first check valve 81: spring 82: piston

82a: hole 90: second bypass valve 90a: second check valve

100: flow path 100a: diameter reducing part

The present invention has an orifice connected at one end with an operating cylinder and an accumulator at the other end, two relief valves connected in parallel with the orifice in different directions, and a hydraulic oil connected in parallel with the relief valve and above a certain pressure. Two bypass valves which are operated so as not to pass through, and a check valve is connected to the bypass valve in series and installed so that the hydraulic oil is moved only in one direction.

Here, the bypass valve has an elastic means installed so as to be caught in the inlet portion of the diameter reducing portion, the diameter of the hydraulic oil flow path is reduced, and a plurality of holes so that the hydraulic oil can be passed at the same time without compressing the elastic means if a certain pressure or less. It is characterized in that it comprises a piston that is formed to be a predetermined pressure or more and at the same time compress the spring and block the inlet of the diameter reduction portion so that the hydraulic oil does not pass.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

First, referring to the drawings, FIG. 6 is a hydraulic circuit diagram of an internal pressure suspending device damper according to the present invention, FIG. 7 is a cross-sectional view of a heat generating reduction device according to the present invention, and FIG. A graph showing damping pressure with flow rate.

The hydraulic circuit diagram of the organic pressure suspension device according to the present invention is installed to be connected in parallel to the orifice 70 and the orifice 70 connected to the operation cylinder 50 and the pressure storage cylinder 60 as shown in FIG. When the pressure on the working cylinder 50 side is greater than or equal to a predetermined pressure, the first relief valve 51 and the first relief valve installed so that the hydraulic oil of the working cylinder 50 can be moved to the pressure storage cylinder 60, The second relief valve 61 is installed so as to be connected in parallel with the 51 and the pressure of the pressure storage cylinder 60 is greater than a predetermined pressure so that the hydraulic oil can be moved from the pressure storage cylinder 60 to the operation cylinder 50. ) And the second relief valve 61 are installed to be connected in parallel, and when the hydraulic pressure of the operation cylinder 50 is lower than or equal to the predetermined pressure P, the hydraulic oil is moved to the accumulator cylinder 60 and the constant pressure P ), Hydraulic oil cannot move. A first check valve 80a for locking, a first check valve 80a connected in series with the first bypass valve 80 so that hydraulic oil can flow in only one direction, and the second relief valve It is installed to be connected in parallel with (61) and the hydraulic oil is moved to the accumulator cylinder (60) if the hydraulic pressure on the accumulator cylinder 60 is less than or equal to the predetermined pressure (P '), and the hydraulic oil is moved if the hydraulic pressure is above the constant pressure (P') It consists of a second bypass valve 90 so as not to be possible, and a second check valve 90a which is connected in series with the second bypass valve 90 so that hydraulic oil can flow only in one direction.

Here, the first bypass valve 80 and the second bypass valve 90 is a spring 81 which is installed to be caught in the inlet of the diameter reducing portion (100a) is reduced in diameter of the flow path (100), If one end of the spring 81 is caught and a plurality of holes 82a are formed to pass the hydraulic oil at a predetermined pressure (P, P ') or less, and the hydraulic oil passes at a predetermined pressure (P, P') or more. It is composed of a piston (82) caught in the inlet of the diameter reducing portion (100a) so as not to be.

Referring to FIG. 8, the operation of the cylinder 50 when the pressure is applied to the operation cylinder 50 when the vehicle is driven, that is, the pressure of the operation cylinder 50 in a jounce state is a constant pressure (P). Or less), the hydraulic pressure does not become a pressure for the piston 82 of the first bypass valve 80 to compress the spring 81, so that the hydraulic pressure is increased through the hole 82a of the piston 81. When the hydraulic pressure of the working cylinder 50 is greater than the predetermined pressure P, the hydraulic pressure compresses the piston 82 so that the piston 82 of the reduction cylinder 100a is moved to the pressure storing cylinder 60. The inlet is blocked so that the hydraulic oil does not pass and passes through the first relief valve 51 and the orifice 70.

On the contrary, when the pressure applied to the operation cylinder 50 is removed, that is, in the rebound state, the second bypass valve 90 is operated similarly to the operation of the first bypass valve 80. . In other words, when the hydraulic pressure of the pressure storage cylinder 50 is equal to or less than the predetermined pressure P ′, the hydraulic oil is moved through the second bypass valve 90, and when the hydraulic pressure is equal to or greater than the predetermined pressure P ′, the second Since the path 90 is blocked, it is operated by the second relief valve 61 and the orifice 70.

As described above, the heat reduction device of the organic pressure suspending device according to the present invention prevents unnecessary temperature increase inside the organic pressure suspending device by passing hydraulic oil inside the damper when the damping force may be small according to the driving conditions of the vehicle. Provides the effect of improving life.

Claims (2)

An orifice connected at one end with an operating cylinder and an accumulator at the other end, two relief valves connected in parallel with the orifice in different directions, and connected to the relief valve in parallel and above a certain pressure to prevent hydraulic oil from passing therethrough. And two check valves operated in series, and check valves connected to the bypass valves in series and installed to move hydraulic oil in only one direction. The method of claim 1, The bypass valve is provided with an elastic means which is installed to be caught in the inlet portion of the diameter reducing portion, the diameter of the hydraulic oil passage is reduced, and a plurality of holes are formed so that the hydraulic oil can be passed at the same time without compressing the elastic means if the predetermined pressure or less; And a piston installed to prevent the hydraulic oil from passing by compressing the spring and blocking the inlet of the diameter reducing part when the predetermined pressure is higher than the predetermined pressure.