KR100746686B1 - Damping valve steering device - Google Patents

Abstract

The present invention relates to a damping valve of the steering apparatus, the purpose of which is to provide a damping valve of a simple structure to control the hydraulic movement in the forward and reverse direction by operating the valve plate formed with the flow path is easy to manufacture and assemble, volume It is to provide a damping valve of the steering apparatus that can reduce the, the supply port 31 is formed on one side and the discharge port 32 formed on the other side, the outer peripheral surface is fixed to the inside of the housing 30 The valve plate 40 installed therein, the inner circumferential hole 41 formed on the inner circumferential side of the valve plate 40 and the outer circumferential hole 42 formed on the outer circumferential side, and the installation formed on the center side The pin 43 is inserted into the ball 43, the installation hole 43, the head 51 is provided to cover the inner circumference hole 41 toward the supply port 31 side, the valve plate 40 The discharge port 32 side of the pin 50 to be spaced apart from the One end is supported by the support plate 60, the support plate 60 installed in the support plate 60, and the other end is elastically supported by the spring 70, which is disposed toward the valve plate 40, and the spring 70. Covering the inner circumferential side is a configuration that is provided with a disk 80 formed with a plurality of communication holes 83 to communicate with the inner circumferential hole (41).

Valve plate, inner hole, outer hole, spring, support plate, disc, communication hole, bending

Description

Damping valve for steering system {DAMPING VALVE STEERING DEVICE}

1 is a cross-sectional view showing a conventional damping valve.

2 is a front view showing a steering apparatus according to the present invention.

3 is a cross-sectional view showing a damping valve according to the present invention.

4 is a cross-sectional view showing a forward operation state of the damping valve according to the present invention.

5 is a cross-sectional view showing a reverse operation state of the damping valve according to the present invention.

Explanation of symbols on the main parts of the drawings

20: damping valve 30: housing

40: valve plate 41: inner hole

42: Outsourcing 43: Installation

50: Pin 51: Head

52: support groove 60: support plate

70: spring 80: disk

81: guide part 82: opening and closing part

83: Communication hole

The present invention relates to a damping valve, and more particularly, to provide a damping valve of a simple structure so that the valve plate formed with a flow path is operated to control hydraulic movement in the forward and reverse directions, so that the fabrication and assembly of the damping valve is easy and the volume is reduced. It relates to a damping valve of the steering device.

In general, the steering apparatus is provided with a steering shaft provided on the lower side of the steering wheel, a rotary valve connected thereto and a gearbox that is axially moved according to the hydraulic pressure supplied through the rotary valve to directly operate the wheel of the vehicle.

Meanwhile, a cylinder is formed inside the gear box, and a piston is installed inside the gear box, and a rack bar is installed on the center side of the piston and extends to both sides of the gear box and interlocks with it.

At this time, each hydraulic pipe is connected between the two sides of the cylinder divided into left and right sides by the piston and the rotary valve, and when the hydraulic pressure is supplied to one cylinder through the rotary valve, the other side of the cylinder Hydraulic is discharged through.

In addition, the hydraulic tube is provided with a damping valve to adjust the flow path in accordance with the movement direction of the hydraulic pressure to absorb the vibration transmitted to the driver side from the rack bar inserted in the cylinder and the hydraulic vibration transmitted to the rack bar to improve the steering feeling.

1 is a cross-sectional view showing such a conventional damping valve. As shown in the drawing, the housing 1 is provided to be opened in the up and down directions so as to form an external shape of the damping valve, and the inside thereof has a larger diameter.                         

At this time, the housing 1 is provided to be separated in the upper and lower directions, and the valve body 2 is installed between the upper and lower sides thereof, and the pins extending upward and downward thereof on the center side of the valve body 2. (3) is inserted, and this pin (3) is elastically supported downward by a spring (4) provided on the outer peripheral side of its lower end.

In addition, a plurality of flow path holes 5 are formed on the outer circumferential side of the valve body 2 in the up and down directions, and the retainer 6 and the washer 7 are installed on the outer circumferential side of the upper end of the pin 3. Below the washer 7, a disk 8 which is in close contact with the upper end of the valve body 2 is provided by a spring 4 which supports the pin 3 downwardly.

In addition, a valve plate 9 which is in close contact with the lower end side of the valve body 2 by a spring 4 is also installed at the lower end side of the pin 3, and the valve body in contact with the disk 8 and the valve plate 9 ( A part of the upper side and the lower side of 2) is spaced apart from them and always opens the flow path hole 5 formed therebetween.

At this time, the flow path hole 5 which is always opened between the disk 8 and the valve plate 9 is a flow path hole 5 formed at different positions, through which a small amount of hydraulic pressure can always move upward and downward. Because of this, the hydraulic pressure is always delivered to the inside of the valve.

On the other hand, when greater hydraulic pressure is moved from the upper side to the lower side, the valve plate 9 closing the flow path hole 5 at the lower end of the valve body 2 pushes the spring 4 to open the flow path hole 5 and Since it is moved through, it does not receive much resistance and enables smooth hydraulic movement.

On the contrary, when a larger hydraulic pressure is moved from the lower side to the upper side, the hydraulic pressure bends the outer peripheral side of the disk 8 above the valve body 2, which is provided by the washer 7 installed on the upper side thereof. Since the deformation amount is limited, the movement amount and the moving speed are reduced due to the large resistance of the hydraulic pressure and the opening of the narrow passage hole 5, thereby obtaining a damping effect.

However, the conventional damping valve configured as described above has a problem in that the number of parts constituting it is inconvenient in manufacturing and assembling thereof and takes up a lot of installation space, resulting in high production cost and limitation in installation.

The present invention is to solve such a conventional problem, the object is to provide a damping valve of a simple structure to control the hydraulic movement in the forward and reverse direction to operate the valve plate formed with the flow path is easy to manufacture and assembly In addition, the present invention provides a damping valve of a steering device that can reduce volume.

In order to achieve the above object, a damping valve of a steering apparatus of the present invention includes a gear box forming a cylinder therein, a piston installed to be movable in the cylinder, and an outer side of the cylinder partitioned by the piston. In the steering apparatus having an extended hydraulic pipe, the supply port is formed on one side and the discharge port is formed on the other side of the housing installed on one side of the hydraulic tube, the outer peripheral surface is installed in the valve so as to be fixed to the inside of the housing Plate, a plurality of inner circumferential holes formed on the inner circumferential side of the valve plate and a plurality of outer circumferential holes formed on the outer circumferential side and an installation hole formed on the center side, are inserted into the installation hole, but the supply port side has the inner circumferential hole A pin provided with a head to cover the support plate, a support plate installed toward the discharge port side of the pin so as to be spaced apart from the valve plate, One end is supported on the base support plate and the other end is elastically supported by the spring disposed on the valve plate side. do.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention;

2 is a front view showing a steering apparatus according to the present invention. As shown in the figure, a rotary valve 11 is provided at one side of the hollow gearbox 10 formed to extend left and right so as to protrude upwardly intersecting therewith, and one side of the rotary valve 11 is a hydraulic pump. Connected.

In addition, a rack bar 12 is installed inside the gear box 10, and a piston 13, which is in close contact with the inner surface of the gear box 10, is installed at an approximately middle side of the rack bar 12, and the left and right sides thereof are installed. A cylinder 14 is formed, and each of the hydraulic pipes 15 connected to the rotary valve 11 is provided outside the cylinder 14.

On the other hand, one side end of the hydraulic pipe 15 is transmitted to the driver side from the rack bar 12 inserted in the cylinder 14 by adjusting the flow path in accordance with the movement direction of the hydraulic pressure moved between the rotary valve 11 and the cylinder 14. Damping valve 20 is installed to absorb the vibration and the vibration of the hydraulic pressure transmitted to the rack bar 12 to improve the steering feeling.

3 is a cross-sectional view showing a damping valve according to the present invention. As shown in this, the damping valve 20 of the present invention is provided with a simple structure to operate the valve plate 40 formed with a flow path to control the hydraulic movement in the forward and reverse directions.

That is, the housing 30 is provided to achieve the external shape of the damping valve 20. The housing 30 is opened upwards and downwards so that the supply port 31 is formed on the upper side, and the discharge port 32 on the lower side. ) Is formed, the inside of which forms a space of larger diameter and height.

In addition, a support groove 33 recessed to the outside is provided inside the connection portion of the housing 30 formed to be separated into upper and lower sides, and an O-ring 34 and a valve plate 40 to prevent leakage of oil therein. ) Is installed.

The valve plate 40 is inserted into the support groove 33, the outer peripheral end side is bent upward and downward due to the elastic force of the material, the inner circumferential side of the plurality of inner circumferential hole 41 is symmetrical to each other, It penetrates in a direction, and a plurality of outer peripheral holes 42 are formed on the outside thereof, and the inner peripheral holes 41 and the outer peripheral holes 42 are flow paths provided to move the hydraulic pressure.

In addition, an installation hole 43 is formed at the center side of the valve plate 40, and the installation hole 43 has a pin 50 to open and close the inner circumference hole 41 in accordance with the bending of the valve plate 40. These pins 50 have both ends of the pin 50 extending upward and downward of the valve plate 40.

That is, the lower side disposed on the supply port 31 side of the pin 50 is formed larger than the diameter from the center side of the valve plate 40 to the inner circumferential hole 41 to cover the inner circumferential hole 41. On the contrary, the support groove 52 is formed on the outer circumferential side of the distal end thereof, and the support plate 60 has a diameter substantially similar to that of the head 51. ) Is fixedly installed.

In addition, a spring 70 is installed between the support plate 60 and the valve plate 40. The spring 70 uses a low elastic force so as to be sensitive to a pressure change, and one end of the support plate 60. The other end side of the spring 70 is supported by the disk 80 is installed to move up and down along the pin 50 to open and close the outer periphery hole 42 of the valve plate 40.

The disk 80 is wrapped around the outer periphery of the pin 50 on the center side, so that the guide portion 81 and the valve plate 40 at one end of the guide portion 81 to be moved along it. It is formed as a wide opening and closing portion 82 and the communication hole 83 formed in plural numbers so as to be in communication with the inner circumferential hole 41 of the valve plate 40 on the middle side of the opening and closing portion 82.

That is, the disk 80 is elastically supported by the spring 70 when there is no hydraulic movement, and is in close contact with the valve plate 40, so that the disk 80 can be closed to close the outer circumferential hole 42 of the valve plate 40. .

As shown in FIGS. 4 and 5, the damping valve of the present invention configured as described above operates the valve plate 40 and the disk 80 therein according to the moving direction of the hydraulic pressure.

First, when the hydraulic pressure is moved from the supply port 31 side to the discharge port 32 side in the forward direction, the hydraulic pressure moved through the outer circumferential hole 42 of the valve plate 40 corresponds to the outer circumferential side of the disk 80 corresponding thereto. In this case, the disk 80 is elastically supported by the spring 70 having a low elastic force, so that the disk 80 is lightly moved, and thus the hydraulic pressure is smoothly moved to the discharge port 32 side.

On the contrary, when the hydraulic pressure is moved in the reverse direction, the hydraulic pressure entering the discharge port 32 is introduced into the communication hole 83 and the inner circumferential hole 41 of the valve plate 40 and at the same time, the opening and closing portion 82 of the disk 80 This pushes the valve plate 40 to be in close contact with the disk 80 and the valve plate 40 is bent toward the center side, thereby opening the communication hole 83 and the inner circumferential hole 41 to the supply port 31 side.

At this time, the hydraulic pressure moved in the reverse direction pushes the disk 80 and the valve plate 40 toward the supply port 31 side, for this purpose, since both the elastic force of the disk 80 and the valve plate 40 acts as a resistance, Since the opening degree is small, the amount of movement and the speed of hydraulic pressure are lowered to obtain a damping effect.

As described above in detail, the damping valve of the steering apparatus according to the present invention is easy to manufacture and assemble because it is provided with a simple structure with a small number of parts, occupy a small installation space, thereby reducing the production cost, installation There is an easy advantage.

Claims (2)

In a steering apparatus having a gear box forming a cylinder therein, a piston provided to be movable within the cylinder, and a hydraulic tube extending outwardly of the cylinder partitioned by the piston, A supply port 31 is formed at one side and a discharge port 32 is formed at the other side so that the housing 30 installed on one side of the hydraulic pipe 15 and an outer circumferential surface thereof are fixed to the inside of the housing 30. The valve plate 40 to be installed, the inner circumferential hole 41 formed on the inner circumferential side of the valve plate 40 and the outer circumferential hole 42 formed on the outer circumferential side, and the installation hole 43 formed on the center side ) Is inserted into the installation hole 43, but is spaced apart from the valve plate 40 and the pin 50 provided with the head 51 to cover the inner circumference hole 41 toward the supply port 31. The support plate 60 installed on the discharge port 32 side of the pin 50, one end is supported on the support plate 60 and the other end is a spring 70, the spring 70 is disposed to the valve plate 40 side It is elastically supported by the disk covering the outer circumference (42) and a plurality of communication holes (83) formed on the inner circumference side to communicate with the inner circumference (41) ( Damping valve of the steering apparatus characterized in that it is provided. According to claim 1, The disk 80 is formed of a guide portion 81 to be connected to the opening and closing portion 82 formed in close contact with the valve plate 40 and to surround the pin 50, the pin 50 Damping valve of the steering apparatus, characterized in that the axial movement along.

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