KR20180056025A - Device for adjusting alignment of steering link for vehicle - Google Patents

Abstract

The present invention relates to a device for adjusting an alignment of an axle pitman arm steering vehicle which uses an MR fluid to prevent torsion phenomena of a steering wheel. Thus, the present invention is mounted with an alignment adjusting device using the MR fluid in a drag link included in a steering device such as middle and large sized trucks so as to absorb forward and backward moving amount of the drag link in accordance with a tow angle through a valid stroke of the alignment adjusting device when a steering of the steering wheel is not implemented while preventing torsion phenomena of the steering wheel. In addition, when the steering of the steering wheel is implemented, a smooth steering can be performed by fixing the valid stroke of the alignment adjusting device.

Description

[0001] The present invention relates to a device for adjusting an alignment of a steering wheel,

[0001] The present invention relates to an early-engine wheel alignment apparatus for an axle-type pit only, and more particularly, to an early- Quot;

In commercial vehicles, small-sized trucks are equipped with a single-shaft front-wheel steering system, while large trucks are equipped with front-wheel and two-axis steering systems.

1, the front wheel unidirectional steering apparatus includes a steering gear box 10 connected to a steering wheel of a driver's seat, and a pit-only arm 12 (a kind of output link connected to the output shaft of the steering gear box 10) A drag link 14 which is connected to the puck only arm 12 at the front end and is connected to the knuckle arm 16 so as to move back and forth at each rotation of the pit arm, And a knuckle arm (16) connected between the steering wheel (20) and steering the traveling wheel.

Therefore, when the deceleration force is output to the arm 12 only by the pit from the steering gear box due to steering of the steering wheel, only the pit 12 rotates clockwise or counterclockwise, and the drag link 14 advances And the knuckle arm 16 connected to the drag link 14 steers the traveling wheel hub 20 to the left or right so as to steer the traveling wheel.

2, the front wheel 1 and 2-axis steering apparatus includes a steering gear box 10 connected to a steering wheel of a driver's seat, such as a front wheel 1-axis steering apparatus, and a steering gear box 10 connected to an output shaft of the steering gear box 10 The first driving wheel hub 20a and the second driving wheel hub 20b include a first drag link 14a and a second drag link 14b, It is connected separately.

As described above, since the steering wheel and the driving wheel hub of the driver's seat are linked by a linkage type via a drag link and a knuckle arm, as well as a pit-only arm, there are problems such as deviating the vehicle or turning the steering wheel .

First, as shown in FIG. 3, when the traveling wheel is moved up and down with the suspension operating according to the road surface during traveling, the toe angle of the traveling wheel without steering the steering wheel due to the impact, When viewed from below, an angle formed by a straight line passing through the center of the traveling wheel (the wheel) from the front to the rear of the vehicle occurs, causing a problem of vehicle leaning and tire uneven wear even during straight running.

4, when the toe angle occurs in the traveling wheel due to an impact or geometry error of the traveling wheel moving up and down, the drag link 14 connected to the traveling wheel hub 20 via the knuckle arm 16, At the same time, only the pit connected to the drag link 14 rotates each time the arm 12 rotates, and eventually the steering wheel 22 is undesirably tilted as if the driver steers the steering wheel 22 .

As described above, in the steering apparatuses such as small, medium, and opposed trucks, since the steering wheel and the traveling wheel hub are connected by a linkage type via a drag link and a knuckle arm, as well as a Pitt only arm, There is a problem of chronicity.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above conventional problems, and it is an object of the present invention to provide an apparatus and a method for mounting an alignment control apparatus using MR fluid on a drag link included in a steering apparatus such as a small- The effective stroke of the adjusting device absorbs the forward and backward movement amounts of the drag link according to the tow angle and at the same time prevents the steering wheel from being twisted and when there is steering of the steering wheel, The present invention is directed to providing an early-engine-starting vehicle with an axle-type pit only.

In order to attain the above object, the present invention provides a steering gear box comprising: a steering gear box connected to a steering wheel; a pit only arm connected to an output shaft of the steering gear box; a drag link connected to the pit- And a knuckle arm connected between the drag link and the hub of the traveling wheel, the apparatus comprising: a first drag split link connected to the pit only arm and a knuckle arm And an alignment control device using MR fluid is connected and mounted between the first drag split link and the second drag split link so that when there is no steering wheel steering, an effective stroke of the alignment control device Absorbs the forward and backward movement of the drag link connected to the knuckle arm, and when there is steering of the steering wheel, Axle type, characterized in that the pit to be the desired steering through the effective stroke of fixed bit control device only provides an early adjustment of treatment of cancer vehicle steering apparatus.

In a preferred embodiment of the present invention, the alignment control device using the MR fluid comprises: a hollow cylinder; A MR fluid case connected to the first drag split link and mounted to the front end of the hollow cylinder; A plunger connected to the second drag divided link so as to be inserted back and forth at a rear end portion of the hollow cylinder; A piston formed integrally with a front end portion of the plunger so as to have a structure in which an MR fluid inlet / outlet hole is formed to pass therethrough, And an electromagnet attached to a neck portion of the MR fluid inlet / outlet hole of the piston for applying a current for adjusting the viscosity of the MR fluid; .

Preferably, a locking pin access groove is formed in the inner wall surface of the hollow cylinder, and a locking pin elastically supported by a spring is provided in the locking pin access groove so as to be able to move in and out. An elastic restoring force of the spring And a locking pin locking groove in which the locking pin is locked is formed.

The alignment control apparatus further includes a controller for applying an electric current to the electromagnet, and the electric current applied from the controller is applied to the electromagnet through a current connecting line embedded in the plunger and the piston.

Preferably, the controller is connected to a steering angle sensor or a steering angle velocity sensor for transmitting steering angle presence / absence signals of the steering wheel.

The front end of the MR fluid case and the rear end of the plunger are formed with male threads for screw connection with the first drag split link and the second drag split link, respectively.

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

First, an alignment control device using a MR fluid is mounted on a drag link included in a steering device such as a small-sized and an opposed truck, and when there is no steering wheel steering, the effective stroke of the alignment control device By absorbing the amount of displacement, it is possible to prevent the steering wheel from slipping, and it is also possible to prevent the vehicle from slipping due to the turning of the steering wheel.

Secondly, when there is steering of the steering wheel, smooth steering according to the steering angle of the steering wheel can be achieved through the effective stroke fixing of the alignment adjusting device.

1 is a schematic view showing a front wheel uniaxial steering apparatus,
2 is a schematic view showing a front wheel 1, 2-axis steering apparatus,
3 is a schematic view showing a tow angle problem occurring in a conventional steering apparatus,
FIG. 4 is a schematic view showing a shift of a steering wheel caused by a vehicle steepness occurring in a conventional steering apparatus;
FIG. 5 is a schematic view showing an early-engine wheel alignment apparatus of an axle type pit-only vehicle according to the present invention,
6 to 8 are sectional views showing an example in which an early-engine wheel alignment vehicle of an axle-type pit-only vehicle according to the present invention operates,
9 is a cross-sectional view showing the principal part of the operation principle of the MR fluid.

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

FIG. 5 is a view showing an installation state of an early workpiece alignment apparatus according to the present invention, and FIGS. 6 to 8 show an operation state of an early workpiece alignment apparatus according to the present invention.

5, the front wheel uniaxial steering apparatus according to the present invention includes a steering gear box 10 connected to a steering wheel of a driver's seat, and an output link pit which is a kind of output link connected to the output shaft of the steering gear box 10. [ A drag link 14 having a front end portion connected to the pit only arm 12 and a rear end portion connected to the knuckle arm 16 so as to move forward and backward during each rotation of the pit arm, And a knuckle arm 16 that is connected between the driving wheel hub 20 and steering the traveling wheel, and the drag link 14 is connected to the first drag split link 14-1 And a second drag division link 14-2 connected to the knuckle arm 16. The MR fluid is used between the first drag division link 14-1 and the second drag division link 14-2 And the alignment adjustment device 100 is mounted.

The alignment control apparatus 100 using the MR fluid has a hollow cylinder 110 as a skeleton and a MR fluid case 120 connected to the first drag division link 14-1 on the inside and outside of the front end of the hollow cylinder 110 And a plunger 130 connected to the second drag link 14-2 is mounted on the inner and outer sides of the rear end of the hollow cylinder 110 so as to be able to move in and out.

A piston 140 is integrally formed at the front end of the plunger 130 inserted into the hollow cylinder 110 and having a structure in which an MR fluid inlet and outlet hole 142 is passed therethrough, Is inserted into the fluid case (120) so as to be able to move in and out.

Preferably, a male screw formed at the front end of the MR fluid case 120 and at the rear end of the plunger 130 is connected to the first drag split link 14-1 and the second drag split link 14-2 By the screwing, the alignment control apparatus 100 using the MR fluid is connected between the first drag division link 14-1 and the second drag division link 14-2.

An electromagnet 144 is attached to the inside of the MR fluid inlet / outlet hole 142 of the piston 140 to apply a current for controlling the viscosity of the MR fluid filled in the MR fluid case 120.

A current connecting line 152 is disposed inside the plunger 130 and the piston 140. The current connecting line 152 includes a controller 150 for applying current control to the electromagnet 144 .

More preferably, the controller 150 is connected to a steering angle sensor or a steering angle velocity sensor 154 for transmitting steering angle presence / absence signals of the steering wheel. In the controller 150, the steering angle sensor or the steering angle sensor 154 The current is applied to the electromagnet 144 through the current connect line 152 only when there is a signal.

9, MR fluid 122 (Magnero-Rheological Fluid) 122, which is filled in the MR fluid case 120, is an oil component fluid including nanoparticles having ferromagnetic properties, And the nanoparticles form a certain arrangement (for example, a chain arrangement) when the magnetic field is applied, thereby acting as a resistance for blocking the flow of the fluid.

When a current is applied to the electromagnet 144 and a magnetic field is applied to the MR fluid, the nano particles in the MR fluid 122 existing in the MR fluid inlet / outlet hole 142 of the piston 140 act as a blocking plate The fluids at the front and rear positions of the piston 140 are fixed as the viscosity is increased and the piston 140 acts as a resistance against the back and forth movement of the piston 140. As a result, That is, the effective stroke fixing state of the alignment control apparatus.

On the other hand, when no current is applied to the electromagnet 144, the MR fluid 122 in the MR fluid case 120 is freely transportable through the MR fluid inlet / outlet hole 142 of the piston 140, The movable member 140 can be moved back and forth, that is, the state in which the effective stroke operation of the alignment control apparatus is possible.

Hereinafter, an operation flow of the alignment adjusting apparatus of the present invention will be described.

According to the present invention, when there is no steering of the steering wheel by the driver, the backward and reverse amounts of the second drag link 14-2 connected to the knuckle arm 16 are absorbed through the effective stroke of the alignment adjusting device 100, In the case of the steering of the wheel, the desired steering can be achieved through the effective stroke fixing of the alignment control apparatus 100 by the MG fluid.

Steering Wheel Steering  If not (see Figure 6)

When no steering wheel steering is performed by the driver, that is, when the steering angle signal by the steering angle sensor or the steering angle speed sensor 154 is not input to the controller 150, no current is applied to the electromagnet 144. [

The MR fluid 122 in the MR fluid case 120 is freely transportable through the MR fluid inlet and outlet hole 142 of the piston 140. As a result, The effective stroke of the regulating device becomes operable.

At this time, a toe angle is generated on the traveling wheel due to an impact or a geometry error that causes the traveling wheel to move up and down according to the road surface during traveling, and the towing angle is generated on the traveling wheel hub 20 and the knuckle arm 16, Only the plunger 130 connected to the second drag split link 14-2 and the piston 140 integral with the plunger 130 are moved in the MR stroke direction within the effective stroke range even if the piston 14-2 moves forward or backward, And moves back and forth along the inside of the case 120 to absorb the forward and backward amounts of the second drag link 14-2 along the tow angle.

More specifically, even if the toe angle is generated and the second drag division link 14-2 moves forward or backward, only the piston 140 integral with the plunger 130 is moved to the MR fluid case 120 And the amount of movement of the second drag link 14-2 along the forward and backward directions is absorbed by the first drag link 14-2. Only the pit connected to the first drag link 14-2 and the first drag link 14-2 is not transmitted to the arm 12. [

Therefore, only the pit can be maintained in the unsteady state (neutral state) of the steering wheel connected via the arm 12 and the steering gear box 10, and accordingly, the steering wheel distortion It is possible to prevent the occurrence of a phenomenon in which the steering wheel is tilted.

Steering Wheel Steering  (See FIG. 7)

When the steering wheel is steered by the driver, that is, when the steering angle signal by the steering angle sensor or the steering angle velocity sensor 154 is input to the controller 150, a current is applied to the electromagnet 144. [

That is, when there is a steering angle signal from the steering angle sensor or the steering angle speed sensor 154 in the controller 150, current is applied to the electromagnet 144 through the current connecting line 152.

When a current is applied to the electromagnet 144 and a magnetic field is applied to the MR fluid, the nano particles in the MR fluid 122 existing in the MR fluid inlet / outlet hole 142 of the piston 140 act as a blocking plate The fluids at the front and rear positions of the piston 140 are fixed as the viscosity is increased and the piston 140 acts as a resistance against the back and forth movement of the piston 140. As a result, The first drag division link 14-1 and the alignment control device 100 and the second drag division link 14-2 become one link.

Therefore, when the steering force of the steering wheel by the driver is output through the steering gear box 10, the first drag split link 14-1, which is one link, and the second drag split link 14-2, and then transmitted to the traveling wheel hub 20 through the knuckle arm 16, whereby steering of the traveling wheel can be smoothly performed.

MR fluid Fail (See Fig. 8)

Even if the MR fluid 122 in the MR fluid case 120 generates a failure that does not exert its original characteristics even if a current is applied by the electromagnet, the first drag division link 14-1 and the alignment control device 100, And the second drag divided link 14-2 become one link, smooth steering is possible.

A locking pin access groove 112 is formed in the inner wall surface of the hollow cylinder 110 and a locking pin 116 elastically supported by a spring 114 is inserted into the locking pin access groove 112 And a locking pin locking groove 132 is formed on the outer surface of the plunger 130 to lock the locking pin 116 by the resilient restoring force of the spring 114.

Therefore, even if the piston 140 is out of the effective stroke range due to the occurrence of a toe angle or the like, the locking pin 116 is prevented from being pushed by the resilient restoring force of the spring 114 at a certain point out of the effective stroke The locking engagement of the locking pin locking groove 132 with the plunger 130 causes the forward and backward motion of the piston 140 including the plunger 130 to be restricted. And the piston 140, and the second drag divided link 14-2 become one link.

Accordingly, when the steering force of the steering wheel by the driver is output through the steering gear box 10, the first drag division link 14-1, which is one link, the second drag division link 14, And then transmitted to the traveling wheel hub 20 through the knuckle arm 16 after passing through the knuckle arm 14-2 so that steering of the traveling wheel can be smoothly performed even when the MR fluid fails.

10: Steering gear box 12: Pitt only arm
14: Drag link 14a: First drag link
14b: second drag link 14-1: first drag split link
14-2: second drag split link 16: knuckle arm
20; Driving wheel hub 20a: First driving wheel hub
20b: second traveling wheel hub 22: steering wheel
100: alignment control device 110: hollow cylinder
112: locking pin access groove 114: spring
116: Locking pin 120: MR fluid case
122: MR fluid 130: plunger
132: Locking pin locking groove 140: Piston
142: MR fluid inlet / outlet hole 144: electromagnet
150: controller 152: current connect line
154: Steering angle sensor or steering angle velocity sensor

Claims (6)

A drag link in which the front end portion is connected to the pit only arm and the rear end portion is connected to the knuckle arm, and a link portion connected between the drag link and the driving wheel hub [0002] In an early-engine-train-vehicle early-engine starting vehicle equipped with a knuckle arm,
The drag link is divided into a first drag split link connected to the pit only arm and a second drag split link connected to the knuckle arm and an alignment adjustment device using the MR fluid between the first drag split link and the second drag split link Connected,
When the steering wheel is not steered, absorbing the forward and backward amounts of the drag link connected to the knuckle arm through the effective stroke of the alignment adjusting device,
Wherein when the steering wheel is steered, a desired steering can be achieved through the effective stroke fixing of the alignment adjusting device.
The method according to claim 1,
Wherein the alignment adjustment device comprises:
Hollow cylinder;
A MR fluid case connected to the first drag split link and mounted to the front end of the hollow cylinder;
A plunger connected to the second drag divided link so as to be inserted back and forth at a rear end portion of the hollow cylinder;
A piston formed integrally with a front end portion of the plunger so as to have a structure in which an MR fluid inlet / outlet hole is formed to pass therethrough, And
An electromagnet attached to the neck portion of the MR fluid inlet and outlet hole of the piston for current application for controlling the viscosity of the MR fluid;
Of the vehicle. The apparatus of claim 1,
The method of claim 2,
A locking pin is formed in the inner wall surface of the hollow cylinder, and a locking pin, which is resiliently supported by a spring, is removably installed in the locking pin access groove. A locking pin is formed on the outer surface of the plunger, Wherein the lock pin locking groove is formed in the lock pin insertion groove.
The method of claim 2,
Wherein the electric current applied to the electromagnet is applied to the electromagnet through a current connecting line disposed inside the plunger and the piston. Adjuster.
The method of claim 4,
Wherein the controller is connected to a steering angle sensor or a steering angle velocity sensor for transmitting steering angle presence / absence signals of the steering wheel.
The method of claim 2,
Wherein the front end of the MR fluid case and the rear end of the plunger are formed with male threads for screw connection with the first drag split link and the second drag split link, respectively. Regulating device.

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