KR100666858B1 - Rotational load apparatus semi active stabilizer - Google Patents

Abstract

A rotary load apparatus adopted to a semi-active stabilizer is provided to improve the riding comfort and steering performance by operating the ECU by a steering angle when cornering and controlling the roll of the stabilizer. A rotary load apparatus(30) adopted to a semi-active stabilizer is composed of a body(33) connected to a front end of a separated stabilizer(20); a disk-shaped rotor(32) connected to the rear end of the stabilizer and installed in the body for relative rotation; a stator(31) fixed in the body; a piezoelectric element; a steering angle sensor(41) mounted to detect the steering angle; and an ECU(Electronic Control Unit, 42) applying the control voltage to the piezoelectric element and connecting the rotor and stator. The piezoelectric element contains a first piezoelectric element(35) installed at one end of the stator, and a second piezoelectric element(36) mounted at one side of the rotor.

Description

ROTATIONAL LOAD APPARATUS SEMI ACTIVE STABILIZER}

1 is a schematic perspective view showing a state of installation of a general stabilizer.

Figure 2 is a perspective view schematically showing the configuration of a rotary load device employed in the semi-active stabilizer according to the present invention.

Figure 3 is a detailed view showing in more detail the rotary load device of FIG.

4 is a view showing an operating state of the rotary load device of FIG.

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

20. Stabilizer

22. Lower Arm

30. Rotary load device

31. Stator

32. Rotor

33. Body

35. First piezoelectric element

36. Second piezoelectric element

41. Steering Angle Sensor

42. ECU

The present invention relates to a rotary load device employed in a semi-active stabilizer, and more particularly, a rotary load device employed in a semi-active stabilizer for suppressing tilting of a vehicle body by increasing the torsional rigidity of the stabilizer when a roll motion occurs due to turning. It is about.

The general stabilizer is a torsion bar (torsion spring), used for both front and rear wheels, and is attached only to the suspension arms on both sides of the torsion bar, and operates only when there is a difference in the vertical movement of the left and right wheels. .

On the other hand, it does not work when the left and right wheels move up and down at the same time. When the stabilizer is installed, as shown in FIG. 1, both front end portions are respectively installed on the lower arm 11, and the spring rolls are rolled by a spring difference depending on the stroke difference between the left and right wheels generated by the roll movement of the vehicle body when turning. It is possible to prevent deterioration of ride comfort by reducing the speed and changing the roll rigidity ratio of the front and rear wheels.

On the other hand, when both the left and right wheels move up and down at the same time, no spring action is caused.

However, if the left and right wheels are differently impacted when driving in a straight line, when the stroke difference between the left and right wheels occurs, the stabilizer 10 causes a spring action, thereby causing a significant decrease in riding comfort.

In order to solve this problem, a lot of systems have been devised to operate only when the rotary load device or the electromagnetic motor using the hydraulic pressure is mounted in the middle of the stabilizer 10 only when turning.

However, such a system requires expensive and bulky auxiliary devices (e.g. in the case of hydraulic systems) to implement its functions, or it is difficult to achieve as much performance as desired due to the small torque at low speeds. motor)

The present invention was created in order to solve the above problems, by installing a load device that exhibits a small, lightweight, and sufficient performance, so that the stabilizer has a low torsional rigidity during linear driving of the vehicle so that the vertical vibration of the left and right wheels is reduced. Even if it is different, the stabilizer's torsional stiffness is small, preventing the deterioration of ride comfort, and the steering angle sensor increases the torsional rigidity of the stabilizer by turning the steering angle sensor when turning the vehicle. It is an object of the present invention to provide a rotary load device employed in a semi-active stabilizer which is kept in a state.

The rotating load device employed in the semi-active stabilizer of the present invention for achieving the above object, the stabilizer is connected to the lower arm of both wheels so that when the vehicle body is inclined by turning while driving the vehicle, it can be reduced. The main body is divided into two, the main body is connected to the distal end of the divided stabilizer; A rotor of a disc connected to the rear end of the stabilizer divided into two parts and installed in the main body to perform relative rotational movement; A stator provided in the main body at a front end side of the stabilizer at a predetermined distance from the rotor; A piezoelectric element installed at one side of the rotor and the troubleshooter; A steering angle sensor installed to detect a steering angle when the vehicle body is turned; The steering angle detected from the steering angle sensor is input, and the ECU is installed to connect the rotor and the stator by applying a control voltage to the piezoelectric element.

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

FIG. 2 is a perspective view schematically showing the configuration of the rotary load device employed in the semi-active stabilizer according to the present invention, and FIG. 3 is a detailed view showing the rotary load device of FIG. 2 in more detail.

Referring to each of the drawings, the rotary load device 30 employed in the semi-active stabilizer according to the present invention, the lower arm 22 of both wheels so that when the vehicle body is inclined by turning during the driving of the vehicle, it can be reduced; It is installed on one side of the stabilizer 20 connected to the to increase the torsional rigidity of the stabilizer 20 when the roll movement caused by the turning to suppress the inclination of the vehicle body, the stabilizer 20 is divided into two and the stabilizer A main body 33 connected to the distal end of the 20 and a rotor 32 of a circular plate which is connected to the rear end of the divided stabilizer 20 and installed in the main body 33 to perform relative rotational movement, The rotor 32 is configured to include a stator 31 provided in the main body 33 at the front end side of the stabilizer 20 at a predetermined interval.

In addition, the rotary load device 30 employed in the semi-active stabilizer according to the present invention, the steering angle sensor 41 provided to detect the steering angle when the rotor body and the piezoelectric elements provided on one side of the rotor 32 and the vehicle body is turned, respectively. The steering angle detected from the steering angle sensor 41 is input, and an ECU 42 is provided to connect the rotor 32 and the stator 31 by applying a control voltage to the piezoelectric element.

The stator 31 is made of metal, is coupled to the main body 33 and is installed, and the rotor 32 is made of a circular metal plate.

The piezoelectric element includes a first piezoelectric element 35 provided on one side of the stator 31 and a second piezoelectric element 36 provided on one side of the rotor 32.

In addition, the first piezoelectric element 35 is formed by combining two piezoelectric elements, and is coupled to the main body 33 together with the stator 31. The second piezoelectric element 36 is coupled to the rotor 32 and is installed in an annular shape. In addition, a bearing 34 is installed at one side of the second piezoelectric element 36 to be coupled to the second piezoelectric element 36.

And the stator 31 is installed so that relative movement is impossible with respect to the main body 33, while the rotor 32 is installed to allow relative movement with respect to the main body 33.

In addition, an amplifier 43 for amplifying the voltage signal received from the ECU 42 is provided. And the bearing 21 is installed on one side of the front end and the rear end of the stabilizer 20.

Referring to the operation of the rotary load device employed in the semi-active stabilizer according to the present invention having the configuration as described above is as follows.

Referring back to the drawings, the rotational load device 30 employed in the semi-active stabilizer according to the present invention, as shown in Figure 3, stabilizer 20 installed to be connected to the lower arm 22 of both vehicle body wheels, The front end portion is connected to the main body 33 of the rotary load device 30, the rear end is to be connected to the rotor 32, which is a disk (relative movement) in the main body 33.

In the main body 33, two first piezoelectric elements 35 and a stator 31 made of metal are coupled to the outside of the main body 33 of the rotary load device. Therefore, the stator 31 cannot be moved relative to the main body 33.

The rotor 32, which is a circular metal plate with a slight gap with the stator 31, is installed. The rotor 32 is coupled with the second annular second piezoelectric element 36 and is externally supported by the bearing 34. It is coupled with the main body 33. Therefore, this rotor 32 can be rotated relative to the main body 33. In this case, since the stabilizer 20 divided by the gap is rotated without any resistance, the torsional rigidity is very low.

This will be described in more detail.

Figure 4 shows the operating state of the rotary load device 30 according to the present invention at the time of turning.

Referring to FIG. 4, first, when turning is sensed, a voltage is applied to the second piezoelectric element 34 connected to the rotor 32 to sufficiently lengthen the length of the second piezoelectric element 34 to rotate the rotor 32. Contact with the stator 31.

Then, when the two first piezoelectric elements 35 of the stator 31 are excited by an electrical signal, the stator 31 is deformed, and the rotor 32 is rotated by the contact force. As a result, the stabilizer 20 has a strong torsional rigidity.

In addition, in order for the rotor 32 to rotate, the displacement on the surface of the stator 31 in contact with the rotor 32 should be an ellipse. In this case, the rotor 32 is pressed against the surface of the stator 31 and is moved by the frictional force at the interface between them.

That is, the tangential frictional force becomes a component of the force for rotating the rotor 32, and the vertical component adjusts the frictional force. And the velocity and direction of rotation can be adjusted by changing the phase difference between the vertical velocity component and the horizontal velocity component at the contact surface.

In addition, in order to make the elliptical motion of the displacement on the surface of the stator 31, an independent excitation is provided, and two first piezoelectric elements 35 oscillating in the thickness direction (longitudinal direction) are installed at right angles and have a phase difference of 90 degrees. To create an elliptic motion of the displacement.

As described above, the present invention maintains the gap because the steering angle by the steering angle sensor 41 is not detected during the linear driving of the vehicle, and thus, the front end and the rear end of the stabilizer 20 are free to rotate relative to each other so as to have low torsional rigidity. Has

However, when the vehicle body turns, the steering angle is detected by the steering angle sensor 41, and when this is input to the ECU 42, the ECU 42 first controls the second piezoelectric element 36 of the rotor 32. The rotor 32 and the stator 31 are connected by applying a voltage.

Thereafter, the required voltage is applied to the second piezoelectric element 36 to rotate the rotor 32 as described above.

As a result, the torsional rigidity of the stabilizer 20 is drastically increased by disabling the relative rotation between the front end and the rear end of the stabilizer 20 or by creating a relative rotation that cancels the roll motion by turning.

Therefore, the vertical movement of the vehicle left and right wheels is suppressed to improve steering performance and ride comfort.

As described above, the rotary load device employed in the semi-active stabilizer according to the present invention has the following effects.

When driving straight, the stabilizer's torsional stiffness is lowered to prevent deterioration of ride quality when the vibrations of the left and right wheels are different, and when turning, the ECU is operated by its steering angle to provide stabilizer-specific roll suppression function. Both ride and steering performance can be improved.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (13)

In the stabilizer connected to the lower arm of both wheels so that the body can be inclined by turning while driving the vehicle, The main body is divided into two, the main body is connected to the distal end of the divided stabilizer; A rotor of a disc connected to the rear end of the stabilizer divided into two parts and installed in the main body to perform relative rotational movement; A stator provided in the main body at a front end side of the stabilizer at a predetermined distance from the rotor; A piezoelectric element installed at one side of the rotor and the troubleshooter; A steering angle sensor installed to detect a steering angle when the vehicle body is turned; And a steering angle detected from the steering angle sensor, the ECU installed to connect the rotor and the stator by applying a control voltage to the piezoelectric element. The method of claim 1, The stator is made of a metal, rotational load device employed in the semi-active stabilizer, characterized in that coupled to the main body is installed. The method of claim 1, The rotor is a rotary load device employed in a semi-active stabilizer, characterized in that the circular metal plate. The method of claim 1, The piezoelectric element, A first piezoelectric element installed at one side of the stator; And a second piezoelectric element provided at one side of the rotor. The rotary load device employed in the semi-active stabilizer characterized in that it comprises a. The method of claim 4, wherein The first piezoelectric element is a rotary load device employed in a semi-active stabilizer, characterized in that the two piezoelectric elements are combined. The method of claim 5, And said first piezoelectric element is coupled to said body together with said stator. The method of claim 4, wherein And the second piezoelectric element is coupled to the rotor and installed in the semi-active stabilizer. The method of claim 4, wherein The second piezoelectric element is a rotating load device employed in the semi-active stabilizer, characterized in that the ring. The method of claim 4, wherein One side of the second piezoelectric element is a bearing is installed in the rotational load device employed in the semi-active stabilizer, characterized in that coupled to the second piezoelectric element. The method of claim 1, The stator is a rotational load device employed in a semi-active stabilizer, characterized in that the relative movement is impossible with respect to the main body. The method of claim 1, The rotor is a rotary load device employed in the semi-active stabilizer, characterized in that the relative movement with respect to the main body is installed. The method of claim 1, And an amplifier for amplifying the voltage signal received from the ECU. The method of claim 1, Rotary load device is employed in the semi-active stabilizer, characterized in that the bearing is installed on one side of the front end and the rear end of the stabilizer.

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