KR830002549Y1 - Power Key Grip - Google Patents

Abstract

No content.

Description

Power Key Grip

Figure 1 is a longitudinal cross-sectional view of a power key holding device showing an embodiment of the present invention.

2 is a II-II cross-sectional arrow diagram of FIG.

3 is a cross-sectional view of the III-III cross section of FIG.

4 is a cross-sectional view of the IV-IV cross section of FIG.

* Explanation of symbols for the main parts of the drawings

(1): fluid pressure cylinder (10): valve housing

(12): main valve member 24: first flapper valve

(27): second flapper valve (28): steering shaft

(45): Damping plunger (46): Synthetic resin piece

(47): valve ball 50: spring

The present invention relates to a power key control device for controlling a fluid supplied to a fluid pressure motor connected through a connecting means necessary for a steering wheel by a flapper valve mechanism. It is to prevent steering and to improve steering sensation.

In general, the power knob device having a servo valve device made of a flapper valve mechanism is highly sensitive, and thus there is an advantage in that the steering wheel can be quickly and accurately harvested by a small rotational displacement of the flapper valve. However, since the sensitivity of the flapper valve mechanism is very high, the increase in the fluid pressure in the fluid pressure circuit due to the operation of the flapper valve is very rapid, which causes vibration of the flapper valve, thereby controlling the fluid of the servo valve device. It becomes unstable as a characteristic and is easily perceived by a steering man as an unpleasant vibration.

In order to prevent the vibration of the flapper valve, a cylinder hole is drilled and installed in parallel with the rotation axis of the main valve member, and a plunger for pressing the side of the flapper valve is fitted into the cylinder hole with a sliding material, and a pressure fluid is applied to the cylinder hole. There is something to introduce.

According to the present invention, a vibration damping plunger is fitted to each of the flapper valves protruding in the radial direction, and the first vibration plunger is pressed with a hydraulic oil and a spring, and the pressure is applied to the vibration damper. The inner surface of the main valve member is provided to the inner surface of the main valve member through a synthetic resin piece provided at the tip of the plunger to increase the effective radius of the vibration damping surface and to enhance the damping action of the flapper valve.

Next, embodiments of the present invention will be described with reference to the drawings.

Shown in FIG. 1 is a power keying device, on one side of which is provided a fluid pressure cylinder (1) into which the piston (2) is fitted, and on the other, a surge for controlling the pressure fluid supplied to the fluid pressure cylinder (1). The valve housing 10 which accommodated the valve | bulb valve apparatus 3 is provided. In the piston 2, a rack 4 is laid on a part of the circumference, and the rack 4 meshes with a sector gear 6 of an output shaft 5 connected to a steering wheel through a link mechanism. have. In addition, a screw shaft 9 is screwed into the piston 2 via a bowl 8, and one end of the screw shaft 9 is fixed to the outer periphery of the sleeve valve main body 11 and fixed to the valve housing. The main valve member 12 fitted to 10 is fixed. In the axial direction of the main valve member 12, a valve chamber having opposing side walls is formed therethrough. The valve chamber is formed in a sealing member 13 fixed to a central portion of the main valve member 12, as shown in FIG. The two valve chambers 14 and 15 are sealed off at both ends. The valve chambers 14 and 15 communicate with the supply port 16 and the discharge port 17, respectively, and as shown in Figs. 2 and 3 on both side walls of the valve chambers 14 and 15, respectively. And the distribution ports 18, 19 and the jet ports 20, 21 facing each other are opened. One valve chamber 14 has a protrusion in the radial direction, and the first flapper valve 24 having the valve seats 22 and 23 is housed on both sides of the protrusion, and the other valve chamber 15 is provided. Has a projection in the radial direction, and the second flapper valve 27 having valve seats 25 and 26 is housed on both sides of the projection. In addition, the rotation radius of the first flapper valve 24 is smaller than that of the second flapper valve 27 so that the first and second flapper valves 24 and 27 obtain proper steering reaction force during operation. Consists of. The first and second flapper valves 24 and 27 are integrally formed, and the steering shaft 28 protrudes integrally and protrudes outside the valve housing 10. The single torsion bar 29 is inserted into the center of the screw shaft 9, the first and second flapper valves 24, 27 and the steering shaft 28, and the pins 30, 31 It is connected to the screw shaft 9 and the steering shaft 29, respectively. The end of the steering shaft 28 is connected to the steering wheel via a joint and handle shaft (not shown), and is rotated by the steering wheel.

(42) is a bearing for rotatably supporting the main valve member (12) to the valve housing (10), the outer ring (42a) is fitted to the support member (41) fixed to the open end of the valve housing (10). The inner ring 42b is integrally fitted to the main valve member 12. Therefore, this inner ring 42b rotates integrally with the main valve member 12. Moreover, the steering shaft 28 is rotatably supported by the inner ring 42b through the roller 43, and this inner ring 42b forms the bearing member which supports the steering shaft 28. As shown in FIG. Reference numeral 44 is a roller interposed between the steering shaft 28 and the screw shaft 9. A vibration damping flanger 45 and a synthetic resin piece 46 are interposed between the inner surface of the main valve member 12 and the second flap valve 27. The vibration damping plunger 45 is fitted with a sliding material in a valve hole 47 which is drilled in the radial direction to the two flapper valves 27 and 27 protruding in the radial direction. The synthetic resin pin 46 fixed to one end of the vibration damping plunger 45 is formed of a material having excellent heat resistance and abrasion resistance, for example, fleacetal resin (trade name Derurin) or urethane rubber, and the other end of the vibration damping plunger 45. The inner surface of the main valve main body 12 is pressed by the pressurized oil supplied through the flow paths 48 and 49. At the other end of the vibration damping plunger 45, a spring 50 inserted into the valve hole 47 is abutted. An oil groove is also formed on the outer circumferential surface of the vibration damping plunger 45, and an oil film is formed on the sliding surface between the outer circumferential surface and the valve hole 47.

The fluid passage connecting the surge valve device 3 and the fluid pressure cylinder 1 of the above configuration is configured as follows. On the outer circumference of the main valve member 12 fitted to the sleeve valve member 11, as shown in FIG. 3, a pair of circular arcs ***** grooves communicating with the spouts 20 and 21, respectively ( 32 and 33 are separately laid out, and the circular arcs **** grooves 32 and 33 are formed through the distribution channels 34 and 35 laid out on the outer circumference of the main valve member 12. It is in communication with the distribution ports 18 and 19, respectively. In addition, an annular ***** groove 36 is formed on the outer circumference of the sleeve valve member 11, and this annular ***** groove 36 and the circular arc ***** groove 32 on the one side. And the distribution port 18 communicate with each other through the distribution channels 37 and 38. The annular ***** groove 36 is in communication with the cylinder left chamber 1a through the passage 39 provided in the valve housing 10 and the fluid pressure cylinder 1. The other distribution port 19 communicates with the passage 40 provided in one end of the screw shaft 9, and the passage 40 communicates with the cylinder right chamber 1b. In addition, the supply port 16 is connected to a pressure fluid supply source (not shown) and supplies pressure fluid to one valve chamber 14, and the discharge port 17 communicating with the other valve chamber 15 is a blower outlet ( 20), 21 is configured to recover the fluid ejected from the source.

Next, the operation of the power key holding device according to the above configuration will be described. In the neutral state of the steering wheel, the first and first flapper valves 24 and 27 are all positioned in the neutral state of the valve chambers 14 and 15, and thus, the supply port 16 has a valve chamber 14 in it. The pressure fluid supplied therein flows into the distribution ports 18 and 19 and flows out from the discharge ports 20 and 21 into the valve chamber 15 and the discharge port 17.

In this neutral state, since the fluid pressure acting on the cylinder left and right chambers 1a and 1b is in equilibrium, the piston 2 does not operate and the steering wheel is maintained in a neutral state.

Now, when the steering wheel is rotated to the right, the road surface resistance is acting on the screw shaft 9 so that the toe bar 29 is twisted so that the steering shaft 28 is relative to the main valve member 12. Rotate As a result, the first and second flapper valves 24 and 27 are stiffened to the right so that one distribution port 18 and the jet port 21 are closed, and the other distribution port ( 19) and acts to open the spout 20. As a result, the pressure fluid supplied into the valve chamber 14 is pressurized to the outlet 21 through the other distribution port 19, but the outflow amount of the pressure fluid flowing out of the outlet port 21 by the valve seat 26 is discharged. Because of this limitation, it is introduced into the cylinder right chamber 1b through the fluid passage 40 as a distributed pressure fluid to press the piston 2 to the left and to deflect the steering wheel to the right. In this way, a small steering torque applied to the steering wheel by the steering wheel is adjusted by the movement of the piston 2, so that the steering wheel can be deflected lightly. In this case, a pressure fluid acts on the valve seat 26 so that a rotational force in a direction opposite to the steering direction acts on the steering shaft 28, while a pressure fluid at the same pressure acts on the valve seat 23. The rotational force in the steering direction acts on the shaft 28. Since the valve seat 26 is farther away from the valve seat 23 in the radial direction with respect to the axis of the steering shaft 28, the rotational force in the steering direction and the reverse direction is always greater than the rotational force in the steering direction, and the difference in this rotational force is It acts on the steering shaft 28 as a steering reaction force. In addition, since the pressure of the fluid acting on the valve seats 23 and 26 is changed in proportion to the steering angle, that is, the deflection angle of the wheel, the steering force can be sensed as the steering sense by the steering reaction force corresponding to the deflection angle.

However, when the first and second flapper valves 24 and 27 rotate with the rotation of the handle, the fluid pressure changes rapidly, so that the first and second flapper valves 24 and 27 change. Vibration is about to occur. However, when a fluid pressure is generated due to the rotation of the handle, the fluid pressure acts on the other end of the vibration damping plunger 45 via the valve chamber 14, the roller 44, the flow paths 48, 49, Since the synthetic resin piece 46 is pressed against the inner surface of the main valve member 12 by extending in the radial direction, one end of the second flapper valve 27 and the main valve member 12 are connected. As a result, the second flapper valve 27 in the state of the cantilever is brought into the state of the support beam at both ends, so that the vibration of the first and second flapper valves 24 and 27 is prevented. Moreover, since the synthetic resin piece 46 is used, the contact movement with the main valve member 12 is smooth, and a slight vibration is absorbed. In addition, since the vibration damping plunger 45 is held through the valve hole 47 and the oil film, a small vibration is absorbed by the damper effect, and the damper effect is more effective as the flapper valves 24 and 27.

Moreover, when returning a handle, since the 1st and 2nd flapper valves 24 and 27 also open the distribution port 18 and the jet port 21, the fluid pressure of the valve chamber 14 falls. Therefore, since the pressing force of the vibration damping plunger 45 is reduced by the spring 50 and the repulsive force, the frictional force between the main valve member 12 can be reduced and the handle can be smoothly returned to the neutral position.

Next, when the steering wheel is bent to the left, the first and second flapper valves 24 and 27 are rotated to the left and the other by the valve seats 23 and 25 as opposed to the case described above. The distribution port 19 and the jet port 20 of the are closed. Therefore, the pressure fluid to be discharged from the outlet port 20 is tightened by the valve seat 25 so that the arc ***** groove 32, the flow paths 34, 37, 38, the annular ***** groove 36 and the passage 39 are introduced into the cylinder left chamber 1a to press the piston 2 to the right and deflect the steering wheel to the left. In this case, as in the case where the handle is turned to the right side, when the fluid pressure is generated by the rotation of the handle, the fluid pressure acts on the other end of the vibration suppression plunger 45, so that the first and second flapper valves 24, 27) vibration is prevented.

As described above, in the power keying device of the present invention, a vibration damping plunger is inserted into each of the two flapper valves protruding in the radial direction, and the damping plunger is pressed with a hydraulic oil and a spring to press the pressure. Since the inner surface of the main valve member is applied to the inner surface of the main valve member through the synthetic resin piece installed at the tip of the vibration damping plunger, the vibration damping plunger moves the inner surface of the main valve member through the synthetic resin piece to a strong pressure proportional to the fluid pressure. Pressing and the flapper valve abuts against the main valve member, the flapper valve 1 is in the state of the support beam at both ends, the rigidity is increased and the effective radius of the damping action surface is increased to obtain a high vibration damping action. In addition, since the vibration damping plunger is provided in the radial direction, the reaction force that presses the main valve member is canceled, so that an excessive force is not applied to the bearing member that accumulates the flapper.

Claims (1)

A main valve member 12 fitted in the fluid pressure motor 1 and the valve housing 3 connected through the necessary connecting means to the steering wheel and rotating in communication with the operation of the fluid pressure motor 1; The flapper valves 24 and 27 are rotatably housed in the main valve member 12 and control the fluid to be supplied to the fluid pressure motor 1, and the flapper valves 24 and 27 are integrated. And a steering shaft 28 connected to each other so that the relative angular position between the main valve member 12 and the flapper valves 24 and 27 is changed by a manual input torque applied to the steering shaft, thereby providing the fluid pressure support. In the power control device for controlling the flow of pressure fluid delivered to the rotor (1), the vibration damping member (45) (46) movable in a direction perpendicular to the rotation axis of the flapper valves (24) and (27). ) To the flapper valves 24 and 27 to absorb vibrations generated by the flapper valves 24 and 27. Value and, the vibration damping member 45, the power device, characterized in that the helmsman that the pressing (46) on an inner peripheral surface of the main valve member (12).