KR100457801B1 - Height adjustable control valve for shock absorbing car-seat - Google Patents

Abstract

According to the present invention, when a vehicle such as a truck or a bus travels on a rough road such as an unpaved road, the shock absorber of the vehicle chair 1 cushions the shock transmitted to the driver from the rough road. In particular, the height adjustment of the vehicle cushioning chair (1) that can drive, in particular the driver can operate the height adjusting lever (2) formed on one side of the chair (1) to adjust the height of the chair (1) to match the physical condition of the driver It relates to a control valve (20).

Description

Height adjustable control valve for shock absorbing car-seat}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber of a vehicle chair that buffers a shock transmitted to a driver when a vehicle travels on a rough road. Particularly, the present invention relates to a chair of a vehicle in which several drivers, such as a bus or a truck, are driven. The present invention relates to a height adjustment control valve of a shock absorber for a vehicle that can adjust the height of a chair according to physical conditions.

The shock absorber of a conventional vehicle chair is equipped with a damper, an air spring and a balance valve at the bottom of the chair to cushion the shock transmitted to the driver when driving on a rough road. Also, even if the vehicle vibrates up and down due to the impact, the height of the chair from the road surface is kept constant so that the driver can drive in a comfortable state. However, the above-described shock absorbing device of a conventional vehicle chair is fixed to the height of the factory is always the height of the factory and can not control the driver taller or smaller than the average person is the height of the fixed chair and the driver It was very uncomfortable to drive because of poor physical condition, and there was a drawback that the fatigue was further increased by driving for a long time.

An object of the present invention is to provide a height adjustment control valve of a vehicle cushion chair that can adjust the height of the cushion chair of the vehicle so that the driver of a variety of physical conditions to suit their physical conditions in order to solve the above problems.

1 is a partial cross-sectional view of a lower portion of a vehicle chair.

2 is a perspective view of the frame of the vehicle chair.

Figure 3 is an exploded perspective view of the frame of the underside of the vehicle chair.

4 is a front perspective view of the present invention.

5 is a front view of the present invention.

6 is a rear perspective view of the present invention.

7 is a cross-sectional view taken along the line A-A of FIG.

8 is a cross-sectional view taken along the line B-B in FIG.

9 is a view showing a connection configuration for each port of the control valve and a flow path formed at the bottom of the control valve.

10 is a pneumatic circuit diagram of the present invention.

11a to 11c is a view showing a process of adjusting the height of the chair high.

12a to 12c is a view showing a process of adjusting the height of the chair low.

13 is a state diagram of a chair frame in a neutral state without impact from the outside.

14 is a state diagram of a chair frame when the height of the chair is increased by the impact.

15 is a state diagram of a chair frame when the height of the chair is lowered by the impact.

<Description of the symbols for the main parts of the drawings>

1: Chair

2: height adjustment lever

3: rapid descending lever

4: upper frame

5: lower frame

6: damper

7: air spring

8: link

9: cylinder

10: stopper

11: rotor

12: working piece

13: Cam

14: wire cable

15: Balance valve

16: air injection pin

17 air release pin

18: fixed plate

20: control valve

21: first load

22: second rod

23: cable connector

24: spring

25: blocking plate

26: first port

27: second port

28: third port

29: 4th port

30: 5th port

31: 6th port

32: cable fixing groove

33: pressing plate

34: down button

35: up button

36: rapid exhaust button

37: home

38: euro

39: Spool

40: fixed pin

42,43: Connection port

In order to achieve the above object, the present invention is configured such that the first rod 21 and the second rod 22 are elastically supported by the spring 24 on the rear surface of the control valve 20 to be pinned to the fixing pin 40. The first rod 21 connected to the height adjusting lever 2 and the wire cable 14 has two pressing plates 33 formed thereon, so that the up and down buttons 35 and the down button 34 of the control valve 20 are formed. It selectively pressurizes, and the third port 28 and the fourth port 29 of the control valve 20 communicate with each other when the pressing plate 33 of the first rod 21 presses the lift button 35. When the compressed air of the compressed air tank is supplied to the cylinder (9), the stopper (10) restraining and controlling the rotation of the rotor (11) is introduced into the cylinder (9) so that the rotor (11) of the stopper (10) Since the fourth port 29 and the sixth port 31 of the control valve 20 communicate with each other and the compressed air of the compressed air tank is supplied to the air spring 7, the height of the chair 1 is increased. Ha When the pressing plate 33 of the first rod 21 presses the down button 34, the third port 28 and the fourth port 29 of the control valve 20 communicate with each other, so that the compressed air of the compressed air tank Is supplied to the cylinder 9 so that the stopper 10 that restrains and controls the rotation of the rotor 11 is introduced into the cylinder 9 so that the rotor 11 is freed from the restraint of the stopper 10, and the control valve The fifth port 30 of the 20 and the sixth port 31 communicate with each other, and the compressed air inside the air spring 7 is exhausted to the atmosphere, whereby the height of the chair 1 is lowered to match the physical condition of the driver. (1) is configured to adjust the height.

In addition, the second rod 22 is connected to the quick descending lever 3 and the wire cable 14 and coupled to the control valve 20 by the fixing pin 40 to the pressing plate 33 of the second rod 22. When the quick exhaust button 36 of the control valve 20 is pressurized, the sixth port 31 and the first port 26 of the control valve 20 communicate with each other, thereby providing air inside the air spring 7. Is rapidly discharged to the atmosphere is configured so that the height of the chair (1) is lowered quickly.

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

1 is a partial cross-sectional view of a lower portion of the vehicle chair 1, FIG. 2 is a perspective view of the frame of the vehicle chair 1, and FIG. 3 is an exploded perspective view of the frame of the lower portion of the vehicle chair 1.

In order to alleviate the shock transmitted to the driver when the vehicle is driving on a rough road, the upper and lower frames 4 and 5 connected to the lower part of the chair 1 by an “X” -type link 8 as shown in FIG. 1. ), An air spring 7 and a damper 6 are formed. The air spring 7 buffers the shock transmitted to the chair 1, and the damper 6 prevents the chair 1 from continuously vibrating.

On one side of the chair (1), the driver adjusts the height of the chair (1) up and down to fit his / her physical condition, and the height adjustment lever (2) after finishing the operation, the driver quickly lowers the height of the chair (1) The quick descending lever 3 is configured to make it easy to get off the chair 1.

In the frame of the chair 1, a rotor 11 having a working piece 12 and a cylinder 9 having a stopper 10 formed therein are coupled to an inner link 8 in the frame of the chair 1, and a control valve. The fixing plate 18 to which the 20 is fixed is attached to the outer link 8. A balance valve 15, a cam 13, and a control valve 20 of the present invention are coupled to and fixed to the fixed plate 18.

The stopper 10 of the inner link 8 protrudes and retracts from the cylinder 9 to control the rotation of the rotor 11, and the operating piece 12 formed on the rotor 11 rotates while the cam ( 13 is pressurized and rotated, and the cam 13 selectively pressurizes the air injection pin 16 or the air discharge pin 17 of the balance valve 15.

The valve connecting port 42 of the cylinder 9 is connected to the third port 28 of the control valve 20 by a pneumatic pipe as shown in FIG. 9, and is connected to one of three pneumatic ports formed on the balance valve 15. 43 is connected to the second port 27 of the control valve 20 by a pneumatic pipe, one of the other two pneumatic ports is connected to the air spring (7) to the compressed air into the air spring (7) And the other port is an exhaust port for exhausting compressed air inside the air spring 7 to the atmosphere.

4 is a front perspective view of the present invention, FIG. 5 is a front view of the present invention, and FIG. 6 is a rear perspective view of the present invention.

4 and 6, the first port 26, the second port 27, the third port 28 and the fourth port 29 are formed on the front of the control valve 20 and the control valve ( The fifth port 30 and the sixth port 31 are formed on the rear surface of the 20.

The first rod 21 and the second rod 22 are fixed to the control valve 20 by the fixing pin 40 while being elastically supported by the spring 24.

Two pressing plates 33 are formed on the first rod 21 and are connected to the height adjusting lever 2 and the wire cable 14 of the chair 1 through the cable connector 23 to connect the height adjusting lever 2. When operated, the two pressing plates 33 formed on the first rod 21 selectively press the down button 34 and the up button 35 of the control valve 20, respectively.

One pressing plate 33 is formed on the second rod 22 and is connected to the quick descending lever 3 of the chair 1 and the wire cable 14 through the cable connector 23 to connect the quick descending lever 3. When pressed, the pressing plate 33 formed on the second rod 22 presses the quick exhaust button 36.

FIG. 7 is a cross-sectional view taken along line AA of FIG. 5, wherein the first rod 21 of the control valve 20 connected to the height adjusting lever 2 of the chair 1 rotates around the fixing pin 40 to raise the button ( 35) and the down button 34 is selectively pressed.

When the up button 35 or the down button 34 of the control valve 20 is pressed by the first rod 21, a spool 39 inside the control valve 20 connected to the buttons 34 and 35 is provided. ) Slides to the left and right directions, and a plurality of spool lands formed on the spool 39 selectively connect and block flow paths inside the control valve 20 to determine the flow direction of the pneumatic circuit. do.

FIG. 8 is a cross-sectional view taken along line BB of FIG. 5, wherein the second rod 22 connected to the quick descending lever 3 of the chair 1 rotates around the fixing pin 40 and the quick exhaust button of the control valve 20. When pressurizing the 36, the flow path inside the control valve 20 is selectively connected and disconnected while sliding the spool 39 connected to the quick exhaust button 36.

Since the spool 39 of Figs. 7 and 8 selectively slides the flow path, the detailed description thereof will be omitted.

9 is a view illustrating a connection structure for each port of the control valve 20 and a flow path 38 formed at the bottom of the control valve 20.

The first port 26 of the control valve 20 is an exhaust port for discharging air inside the air spring 7, the second port 27 is connected to the balance valve 15, and the third port 28. Is connected to the cylinder (9), the fourth port 29 is connected to the compressed air tank, the fifth port 30 is an exhaust port for discharging the remaining compressed air inside the cylinder (9), the sixth port 31 is connected to the air spring (7) to supply the compressed air to the air spring (7).

The lower portion of the body of the control valve 20, as shown in Figure 9 is formed with a flow path 38 constituting a pneumatic circuit by connecting several ports of the control valve 20 to each other. The groove 37 formed at the end or the middle of each flow path 38 is connected to each port 26, 27, 28, 29, 30, 31 of the control valve 20 to form a pneumatic circuit. Done.

A blocking plate 25 as shown in FIGS. 4 to 6 is attached to the bottom of the control valve 20 to seal the pneumatic flow path 38.

Referring to the operation of the vehicle buffer chair (1) to the present invention configured as described above in detail as follows.

10 is a circuit diagram of the control valve 20 of the present invention, Figures 11a to 11c is a view showing a process of adjusting the height of the chair (1) high.

When the driver pulls the height adjustment lever 2 upward to increase the height of the chair 1, the first rod 21 of FIG. 7 rotates around the fixing pin 40 and the lift button of the control valve 20. At this time, pressurize the 35, and when looking at the circuit diagram of FIG. 10, when the rising button 35 is pressed, the compressed air stored in the compressed air tank is supplied to the fourth port 29 of the control valve 20, and the third port. The compressed air supplied to the cylinder 9 through the 28 and at the same time to the four ports 29 of the control valve 20 is supplied to the air spring 7 through the sixth port 31.

That is, when compressed air is supplied to the cylinder 9, as shown in FIG. 11A, the stopper 10 that restrains the rotor 11 is introduced into the cylinder 9, and the rotor 11 can rotate freely. In the compressed air is injected into the air spring 7 in the height of the chair 1 as shown in Figure 11b. At this time, the rotor 11 does not rotate because the stopper 10 is drawn into the cylinder 9, that is, the state does not restrict the rotation of the rotor 11.

When the driver raises the height of the chair (1) and releases the height adjustment lever (2), the lift operation stops and the neutral state is stopped. The supply of compressed air to the air spring 7 is stopped, and the cylinder 9 remains inside. The compressed air is discharged to the outside through the fifth port 30 of the control valve 20 so that the stopper 10 protrudes from the cylinder 9 again as shown in FIG. 11C.

At this time, the teeth formed at the end of the stopper 10 is coupled to the teeth formed in the arc portion of the rotor 11 to restrain the rotation of the rotor (11).

When the driver pushes the height adjustment lever 2 downward to lower the height of the chair 1, the first rod 21 of FIG. 7 rotates around the fixing pin 40 and the lower button of the control valve 20. At this time, when pressing the down button 34, the compressed air stored in the compressed air tank is supplied to the fourth port 29 of the control valve 20 when the down button 34 is pressed. The compressed air in the air spring 7 which is supplied to the cylinder 9 through the 28 and connected to the sixth port 31 of the control valve 20 is simultaneously connected to the fifth port 30 of the control valve 20. Is discharged to the atmosphere.

That is, when compressed air is supplied to the cylinder 9, as shown in FIG. 12A, the stopper 10 that restrains the rotor 11 is introduced into the cylinder 9 while the rotor 11 is free to rotate. In the compressed air inside the air spring 7 is discharged to the atmosphere as shown in Figure 12b the height of the chair 1 is lowered. At this time, the rotor 11 does not rotate because the stopper 10 is drawn into the cylinder 9, that is, the state does not restrict the rotation of the rotor 11.

When the driver lowers the height of the chair 1 and releases the height adjustment lever 2 (stop operation, neutral state), the compressed air inside the air spring 7 stops being discharged to the atmosphere, and the cylinder 9 The pressurized air remaining in the inside of the control valve 20 is discharged to the outside through the fifth port 30 of the control valve 20, so that the stopper 10 of the cylinder 9 protrudes again as shown in FIG. Constrains the rotation of.

As described above, the driver can operate the vehicle in a comfortable state after adjusting the height of the chair 1 by using the height adjustment lever 2 to suit his physical condition.

In addition, when the driver operates the rapid descending lever 3, the second rod 22 of FIG. 8 rotates around the fixing pin 40 to press the rapid exhaust button 36 of the control valve 20. Referring to the circuit diagram of FIG. 10, when the rapid exhaust button 36 is pressed, the compressed air inside the air spring 7 connected to the sixth port 31 of the control valve 20 is connected to the first port 26 of the control valve. As it is rapidly exhausted to the atmosphere through the height of the chair (1) is rapidly lowered.

After completing the operation of the vehicle, the driver can quickly lower the height of the chair 1 by operating the quick descending lever 3 and then comfortably get off the chair.

As described above, before driving a vehicle, the driver adjusts the height of the chair 1 to fit his / her physical condition, and then operates the vehicle. When the vehicle is traveling on a rough road, the impact transmitted to the driver is as follows. Buffered together.

FIG. 13 is a state diagram of a chair frame in a neutral state without an impact from the outside, and FIG. 14 is a state diagram of a chair frame when the height of a chair is increased by an impact.

When the vehicle travels on a rough road surface in the neutral state without the impact from the outside as shown in FIG. 13, the vehicle vibrates up and down by the impact, and the height of the chair 1 is increased as shown in FIGS. 14 and 15. Will be lowered.

When the height of the chair 1 is increased by the impact, the angle between the inner link and the outer link of the "X" -type link 8 is opened as shown in FIG. At this time, the stopper 10 of the cylinder 9 attached to the inner link 8 rotates the rotor 11 counterclockwise, and the operation piece 12 of the rotor 11 is the outer link 8. ) Pressurizes the cam 13 and the cam 13 pressurizes the air release pin 17 of the balance valve 15.

Referring to the circuit diagram of FIG. 10, when the cam 13 presses the air release pin 17, the compressed air inside the air spring 7 is provided through the sixth port 31 of the control valve 20. As it exits to the exhaust port of 15), the height of the chair 1 is lowered to return to the neutral state as shown in FIG.

When the height of the chair 1 is lowered by the impact, as shown in FIG. 15, the angle between the inner link and the outer link of the "X" link 8 is narrowed. At this time, the stopper 10 of the cylinder 9 attached to the inner link 8 causes the rotor 11 to rotate clockwise, and the operating piece 12 of the rotor 11 is the outer link 8. ) Pressurizes the cam 13 attached to the cam 13 and presses the air injection pin 16 of the balance valve 15.

Referring to the circuit diagram of FIG. 10, when the cam 13 presses the air injection pin 16, the compressed air of the compressed air tank passes through the balance valve 15 and the second port 27 of the control valve 20. The height of the chair 1 is increased while being supplied into the air spring 7 to return to the neutral state of FIG. 13.

As described above, the driver can comfortably drive by cushioning the shock transmitted when the vehicle travels on a rough road, while injecting and discharging air into the air spring 7.

As a result, the technical aspect of the present invention by configuring the control valve 20 in the impact relief device of the vehicle chair 1, the driver operates the height adjustment lever (2) connected by the control valve 20 and the wire cable (14) It is configured to adjust the height of the chair (1) to suit the physical condition of the driver. In addition, when the vehicle is driven, the shock absorber transmitted from the rough road surface to the driver buffers the shock absorber of the chair 1 so that the driver can run in a comfortable state.

As described above, the vehicle cushioning chair 1 to which the control valve 20 according to the present invention is applied has a height control lever 2 for different body conditions of different drivers, unlike a buffer device of a general vehicle chair 1. By adjusting the height of the chair (1) through the driver can drive in a comfortable state is a very useful invention that can significantly reduce the fatigue feeling the driver.

Claims (2)

A first rod 21 and a second rod 22 are elastically supported on the spring 24 on the rear surface of the control valve 20 so as to be pinned to the fixing pin 40; The first rod 21 connected to the height adjusting lever 2 and the wire cable 14 is formed with two pressing plates 33 to selectively select the up button 35 and the down button 34 of the control valve 20. Pressurize; When the pressing plate 33 of the first rod 21 presses the lift button 35, the third port 28 and the fourth port 29 of the control valve 20 communicate with each other to control the compressed air tank. When the compressed air is supplied to the cylinder 9, the stopper 10 which restricts and controls the rotation of the rotor 11 is introduced into the cylinder 9, and the rotor 11 is freed from the restraint of the stopper 10. The fourth port 29 and the sixth port 31 of the control valve 20 communicate with each other so that the compressed air of the compressed air tank is supplied to the air spring 7 so that the height of the chair 1 rises; When the pressing plate 33 of the first rod 21 presses the down button 34, the third port 28 and the fourth port 29 of the control valve 20 communicate with each other, so that the compressed air of the compressed air tank The stopper 10 which restrains and controls the rotation of the rotor 11 is introduced into the cylinder 9 by being supplied to the cylinder 9, and the rotor 11 is freed from the restraint of the stopper 10, and the control valve ( The fifth port 30 and the sixth port 31 of 20 communicate with each other, and the compressed air inside the air spring 7 is exhausted to the atmosphere, whereby the height of the chair 1 is lowered to match the physical condition of the driver. 1) height adjustment control valve of the vehicle cushion chair, characterized in that configured to adjust the height. The method of claim 1, The second rod 22 is connected to the quick drop lever 3 and the wire cable 14 and is coupled to the control valve 20 by the fixing pin 40 so that the pressing plate 33 of the second rod 22 is the control valve. When the quick exhaust button 36 of 20 is pressed, the sixth port 31 and the first port 26 of the control valve 20 communicate with each other, so that the air inside the air spring 7 rapidly flows. The height adjustment control valve for a cushioning chair for a vehicle, characterized in that the height of the chair (1) is rapidly lowered by being discharged to the atmosphere.