KR100707002B1 - Oil pressure control valve of steering device for vehicle - Google Patents

Abstract

The present invention relates to a hydraulic control valve of a vehicle steering apparatus, and an object thereof is to divide a pin housing surrounding an input shaft on both sides, so that a slit groove into which a needle pin is inserted is easily formed. It is to provide a valve, a pair of seating groove 41 formed to correspond to each other on the outer periphery of the input shaft 40, the needle pin 60 is inserted into the seating groove 41 in the radial direction, and Wraps the outer circumference of the input shaft 40 and surrounds the outer circumference of the pin housing 70 and the pin housing 70 having a pair of slit grooves 71 formed thereon so that the needle pin 60 protrudes to the outer circumferential side. In the hydraulic control valve 10 of the steering apparatus for a vehicle provided with a spring 90 to press the needle pin 60 to the center side, the pin housing 70 is formed on both sides divided between the two sides divided The ridge groove 71 is provided.

Input shaft, slit groove, needle pin, pin housing, bolt

Description

OIL PRESSURE CONTROL VALVE OF STEERING DEVICE FOR VEHICLE}

1 is a perspective view showing a conventional hydraulic control valve.

2 is a perspective view showing a hydraulic control valve according to the present invention.

Figure 3 is a longitudinal cross-sectional view of the engaged state of the pin housing according to the present invention.

Figure 4 is a cross-sectional view of the coupling state of the pin housing according to the present invention.

<Explanation of symbols for main parts of drawing>

10: hydraulic control valve 20: pinion shaft

21: Pinion gear 30: Valve body

31: internal groove 32: bolt outer

40: Input shaft 41: Seating groove

45: stop ring 50: torsion bar

60: needle pin 70: pin housing

71: Slit groove 72: Bolt hole

75: Sleeve 80: Bolt

90: spring

The present invention relates to a hydraulic control valve of a vehicle steering apparatus, and more particularly, to improve the flow guide structure of the needle pin installed on the outside of the input shaft in order to improve the neutral steering feeling at medium and high speeds, and is easy to process and assemble. The invention relates to a hydraulic control valve of a vehicle steering apparatus, which reduces the production cost.

In general, the steering device is provided between the driver to transmit the rotational force generated by rotating the steering wheel to the wheel to adjust the direction of travel of the vehicle.

That is, the steering wheel installed in the driver's seat, the steering column connected to the lower side of the steering column, and the steering shaft installed in the interior of the steering column, and the gear box connected to the lower end thereof to change the gear ratio and the power transmission direction, Prepared.

On the other hand, the gear box is provided with a rack bar inside the rack housing is formed to be long, left, right, the rack bar is connected to the wheels via tie rods on both ends of the rack bar, the rack gear is formed on one side of the middle.

In addition, a pinion gear is provided at a middle side of the rack housing so that the rack gear can be operated. The pinion gear is rotated on the upper side of the rack housing to control the hydraulic pressure supplied to the inside of the rack housing. Control valve is installed.

Figure 1 is a perspective view of such a conventional hydraulic control valve. As shown therein, the hydraulic control valve 1 includes a pinion shaft 2 having a pinion gear 2a formed at a lower end side thereof, a valve body 3 coupled to an upper end side of the pinion shaft 2, and An input shaft 4 inserted into the valve body 3 and one end of the input shaft 4 are fixed to the inside of the input shaft 4 and the other end is fixed to the pinion shaft 2 to generate the torsional rotational force therebetween. It is provided with a torsion bar (5).

At this time, the input shaft 4 is extended to the outside of the valve body (3) is connected to the steering shaft receives a rotational force, the torsion bar (5) generates a smooth power transmission and restoring force on the inner center side. .

On the other hand, both sides of the circumferential surface of the upper end of the input shaft 4 are provided with seating grooves 4a having a “V” shaped cross section, and a needle may be inserted into the seating grooves 4a. The pin 6 is installed.

In addition, a hollow pin housing 7 is installed outside the needle pin 6 so as to surround the upper circumferential surface of the input shaft 4, wherein both sides of the pin housing 7 correspond to each other on the outer circumference of the pin housing 7. Slit groove (7a) is formed to be in the axial cut in communication with the seating groove (4a), the pin housing (7) is provided to interlock with the valve body (3).

Thus, the needle pin 6 is partially inserted into the seating groove 4a, the center side is inserted into the slit groove 7a, and the other part protrudes to the outside of the slit groove 7a, which is the needle pin 6 On the outer side of the pin housing (7) to press the) is installed a plate-like spring (3) cut one side of the cylindrical.

In addition, a stop ring 8 is installed at the front end side of the input shaft 4 to prevent the pin housing 7 installed at the lower end thereof from being moved in the axial direction. At this time, the seating groove 4a and the slit groove ( 7a) is arranged to be in communication with each other in the neutral state of the steering wheel.

However, such a conventional hydraulic control valve of a vehicle steering apparatus must form a pair of slit grooves to guide the radial flow of the needle pin when manufacturing the pin housing, so that the slit grooves match the neutral state of the steering wheel. Since it must be installed, high precision processing and assembly is required, there was a problem that the production cost increases.

The present invention is to solve such a conventional problem, an object of the present invention is to divide the pin housing surrounding the input shaft in both sides to form a slit groove in which a needle pin is inserted therebetween easily of the vehicle steering apparatus It is to provide a hydraulic control valve.

In order to achieve the above object, the present invention provides a hydraulic control valve of a steering apparatus for a vehicle, including a pair of seating grooves formed to correspond to each other on an input shaft outer circumference, and a needle pin radially inserted into the seating groove in a radial direction. And a pin housing having a pair of slit grooves formed around the outer circumference of the input shaft and having a pair of slit grooves protruding to the outer circumferential side, and a spring provided to wrap the outer circumference of the pin housing and press the needle pin toward the center. In the hydraulic control valve of the steering apparatus, the pin housing is divided into two sides characterized in that the slit groove is provided between the divided both sides.

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

2 is a perspective view showing a hydraulic control valve according to the present invention. As shown therein, the hydraulic control valve 10 includes a pinion shaft 20 having a pinion gear 21 formed at a lower end side thereof, a valve body 30 coupled to an upper end side of the pinion shaft 20, and An input shaft 40 inserted into the valve body 30 and a torsion bar 50 inserted into the input shaft 40 and the pinion shaft 20 are provided.

In addition, seating grooves 41 having a “V” shaped cross section are provided at both sides of the outer circumferential surface of the upper end side of the input shaft 40, and a needle pin may be inserted into the seating groove 41 so that a part thereof may be inserted. 60 is installed.

On the other hand, the outer side of the needle pin 60, the hollow pin housing 70 is installed so as to surround the upper circumferential surface of the input shaft 40 is interlocked with the valve body 30, in the present invention, the pin housing 70 is divided into two sides.

As shown in FIG. 3 and FIG. 4, the pin housing 70 divided into two sides is provided such that the slit groove 71 is formed between the divided portions, and is closely attached to the circumferential surface of the input shaft 40. It is connected to it so that it can be interlocked with the valve body 30.

That is, one end of the pin housing 70 is inserted between the input shaft 40 and the valve body 30 installed outside thereof so that the outer circumferential surface of the pin housing 70 and the inner circumferential surface of the valve body 30 face each other. It is arranged and combined as a bolt 80.

To this end, the inner side of the valve body 30 is provided with an inner groove 31 formed with an expanded diameter so as to be spaced apart from the outer circumferential surface of the input shaft 40, and the outer side of the inner groove 31 is provided with a valve body ( A bolt outer hole 32 is formed to penetrate through the radial direction 30, and one end side of the pin housing 70 inserted into the inner groove 31 may be radially penetrated to communicate with the bolt outer hole 32. The bolt hole 72 is installed so that it is.

On the other hand, a screw is formed inside the bolt outer hole 32 and the bolt inner hole 72 so that the bolt 80 can be fastened therein, and the pin housing 70 inside the inner groove 31. The hollow sleeve 75 is provided with a thickness larger than the thickness of the pin housing 70 so as to prevent direct contact with the input shaft 40 and has good frictional resistance.

In addition, the outer circumferential side of the pin housing 70 is provided with a plate-shaped spring 90 which is cut to one side of the cylinder to generate the elastic force to the center side to press the needle pin 60 to the center side, the input shaft 40 of the At the tip side, a stop ring 45 is provided to limit the axial movement of the spring 90.

In the hydraulic control valve of the vehicle steering apparatus of the present invention configured as described above, the valve body 30 is provided outside the input shaft 40, and both sides are provided in the inner groove 31 formed on the inner circumferential side of the valve body 30. The divided pin housings 70 are respectively inserted.

Then, the bolt outer hole 32 formed in the valve body 30 and the bolt inner hole 72 formed in the pin housing 70 communicate with each other to insert the bolt 80 therein so that the valve body 30 and the pin housing ( 70 is coupled, and the needle pin 60 is inserted into the slit groove 71 between the divided parts of the pin housing 70.

At this time, by adjusting the installation position of the pin housing 70, to adjust the size and position of the slit groove 71, in this way the size and position of the slit groove 71 is adjusted the pin housing 70 and the valve body The bolt 30 is tightened to fix it.

Thus, the needle pin 60 is inserted into the seating groove 41 formed in the input shaft 40, a part of the outer circumference thereof, the middle is inserted into the slit groove 71, the other part of the outside of the slit groove 71 It will protrude to the side.

In addition, the spring 90 is installed on the outer side of the pin housing 70 so as to press the needle pin 60 protruding outward to the center side, the input shaft 40 for fixing the spring 90 The front end of the stop ring 45 is to be installed.

As described above, in the hydraulic control valve of the vehicle steering apparatus according to the present invention, the pin housing is divided into two sides and slit grooves are formed therebetween, so that the high precision processing required for the production of the slit grooves and steering the slit grooves The high-precision assembly process, which must be installed to match the neutral state of the wheels, can be eliminated, which reduces the production cost.

Claims (2)

A pair of seating grooves formed to correspond to each other on the input shaft outer periphery, a needle pin is inserted into the inner portion of the seating groove in a radial direction, and surrounds the outer periphery of the input shaft, so that the needle pin protrudes to the outer peripheral side In the pin housing having a pair of slit grooves, and the hydraulic control valve of the vehicle steering apparatus provided with a spring to surround the outer circumference of the pin housing to press the needle pin toward the center side, The pin housing (70) is divided into two sides, the hydraulic control valve of the vehicle steering apparatus, characterized in that the slit groove (71) is provided between the divided both sides. The method of claim 1, The pin housing 70 is coupled to the valve body 30 by a bolt 80 which is partially inserted into the valve body 30 and penetrates the radially outer side of the valve body 30. Hydraulic control valve for vehicle steering system.

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