KR100872627B1 - Variable stabilizer of vehicles - Google Patents

Abstract

The present invention relates to a stabilizer of a vehicle that is elastically twisted when turning by turning the left and right wheels of the vehicle and then reduces the body tilt by elastic restoring force. In particular, the stabilizer of the stabilizer according to the straight and turning driving of the vehicle The present invention relates to a variable stabilizer for a vehicle in which stiffness can be appropriately changed to improve steering stability and ride comfort.

To this end, the variable stabilizer of the vehicle of the present invention, by connecting the stabilizer bar to the left and right wheels, is elastically twisted when the height difference of the left and right wheels occurs, thereby reducing the inclination of the vehicle body with elastic restoring force. In the stabilizer, the torsional rigidity of the stabilizer is increased by connecting two stabilizer bars with different torsional stiffnesses to each other and adjusting the engagement position by receiving signals from the speed sensor and the steering angle sensor to change the length composition ratio of the two stabilizer bars. It is made variable.

Stabilizer Bar, Stabilizer Bar Joint, Link Gear, Hydraulic Actuator, Position Arm

Description

VARIABLE STABILIZER OF VEHICLES}

1 is a mounting example of the sterilizer of a typical vehicle

2 is a kinematic schematic diagram of a conventional stabilizer

Figure 3 is an exemplary view showing the installation position of the variable stabilizer of the present invention

Figure 4 is an enlarged perspective view of the present invention variable stabilizer

Figure 5 is a perspective view of the present invention link gear

6 is a schematic view showing the operation of a variable stabilizer of a vehicle according to an embodiment of the present invention;

Figure 7 (a) (b) and 8 (a) (b) is a perspective view and a cross-sectional view showing an operating state of the present invention

Explanation of symbols for the main parts of the drawings

1; stabilizer 10,20; stabilizer bar

11; external gear 30; stabilizer bar joint

31; internal gear 40; link gear

41, 42; internal and external gear 50; speed sensor

60; steering angle sensor 70; oil supply means

71; oil pump 73; directional valve

74; control unit 75; valve operation mechanism

80; Hydraulic drive unit 81; Mounting bracket

82; hydraulic actuator 90; position arm

The present invention relates to a stabilizer of a vehicle that is elastically twisted when turning by turning the left and right wheels of the vehicle and then reduces the body tilt by elastic restoring force. In particular, the stabilizer of the stabilizer according to the straight and turning driving of the vehicle The present invention relates to a variable stabilizer for a vehicle in which stiffness can be appropriately changed to improve steering stability and ride comfort.

In general, the suspension of a vehicle is a device that connects the axle and the body to control the axle from being transmitted directly from the road surface to vibrations or shocks while driving, thereby preventing damage to the body and cargo and improving ride comfort. It consists of a chassis spring for mitigating, a shock absorber for controlling the free vibration of the chassis spring to improve ride comfort, and a stabilizer for connecting both axles to prevent rolling of the vehicle.

In this case, the stabilizer is disposed in the lateral direction of the vehicle body, and both ends are coupled to the left and right suspension arms, and the left and right wheels do not work when the left and right wheels move up and down at the same time, and the left and right wheels move up and down relatively. The torsion rod acts as a torsion rod spring which reduces the inclination of the vehicle body by the torsional elastic restoring force generated at that time.

In other words, when the vehicle is tilted to one side due to centrifugal force during turning, or when the wheels on the left and right side are relatively different in height due to driving or rebounding, the stabilizer is twisted and the body rests quickly with elastic restoring force. .

If the torsional rigidity of such a stabilizer is strong, the vehicle will have better steering stability, but instead, the ride quality will be worse. On the contrary, if the torsional rigidity is weaker, the ride quality will be better, but the steering stability will be worse.

That is, the general stabilizer 1 is composed of a single steel bar, as shown in Figure 1, is coupled to the left and right wheels (5a) (5b) side, the horizontal axis in the state mounted on the vehicle as shown in FIG. The longitudinal axis part 1b is integrally connected to the both ends of (1a), and consists of the "c" shape, and comprises the stabilizer 1.

The horizontal shaft portion (1a) is mounted to the vehicle body via a fixed rod (not shown in the drawing) that is integrally assembled with the mounting bush (2), and the end of the longitudinal shaft portion (1b) is provided with a stabilizer link (5) The upper and lower ends of the stabilizer link 5 are connected to the ball joint 7 so as to be smoothly fixed to the knuckle 6 that moves relative to the vehicle body in the vertical direction.

Therefore, if the relative motion of the left and right wheels occurs while driving, the relative behavior of the left and right wheels is suppressed by the torsional reaction of the horizontal shaft portion 1a, so that the roll is reduced, thereby improving performance of both sides of the steering stability and ride comfort. Its torsional strength is designed to some extent.

On the other hand, for the steering stability, driving stability and ride comfort in the straight and turning driving of the vehicle it is advantageous that the rocking angle (θ) of the stabilizer when the straight ahead is advantageous, and the torsion angle when the turning is large.

However, the conventional stabilizer is composed of steel rods so that the torsional rigidity determined at the time of design cannot be changed, so that the same restoring force is always applied to the vehicle body. There was a drawback in not fully satisfying both performances of riding and riding comfort.

The present invention is to solve such a conventional problem, to provide a variable stabilizer of the vehicle so that the torsional rigidity of the stabilizer can be appropriately changed according to the straight and turning driving of the vehicle to improve the steering stability and ride comfort. The purpose is.

According to an aspect of the present invention for achieving the above object, by connecting the stabilizer bar to the left and right wheels, the vehicle is elastically twisted when the height difference of the left and right wheels occurs, thereby reducing the inclination of the vehicle body by the elastic restoring force In the stabilizer of the stabilizer, the twist of the stabilizer is changed by connecting two stabilizer bars with different stiffness to each other and receiving a signal from a speed sensor and a steering angle sensor to adjust the engagement position to change the length ratio of the two stabilizer bars. It is a feature of the present invention to construct a variable stabilizer for a vehicle in which the strength is variable.

The engagement means of the two stabilizer bars may include an external gear formed at one end of one stabilizer bar and an external gear formed integrally with the torsional rigidity of the two stabilizer bars at one end of the other stabilizer bar and a different rigidity. Stabilizer bar joints with internal gears formed so as to be interconnected with each other, and hollow cylindrical inner and outer gears on inner and outer circumferential surfaces, respectively, engaged with the inner and outer gears of the two stabilizer bars for sliding torque at the same time. Link gears that allow the stabilizer to vary the torsional strength by adjusting the engagement position of the two stabilizer bar joints with the stabilizer bar joint, oil supply means for switching the flow of oil in response to signals from the speed sensor and the steering angle sensor, and oil supply By sliding the oil into and out of the link gear The hydraulic drive unit converts the engagement position.

The oil supply means includes: an oil pump and an oil reservoir for pumping oil and supplying and recovering oil, and switching oil flow paths to recover the other oil while selectively inducing supply of oil to either side of the hydraulic driving unit. It is composed of a control unit for controlling the flow path direction of the drive and the direction change valve of the oil pump by determining whether to turn by the direction switching valve, the signal input from the speed sensor and the steering angle sensor.

The hydraulic drive unit comprises a mounting bracket for fixing the stabilizer bar joint to the vehicle body, and a hydraulic actuator fixed to the mounting bracket and driven by the oil supply means to change the engagement position of the link gear.

At this time, the position arm is rotatably assembled through the shaft pin on the mounting bracket, and then both ends of the position arm are connected to the link gear and the hydraulic actuator, respectively, so that the link gear is slid in accordance with the driving of the hydraulic actuator to change the engagement position. In addition, it is preferable to form a long hole at each end of the position arm so that the seesaw operation of the hydraulic actuator shaft and the link gear by the rotation of the position arm is smoothly performed.

Hereinafter, with reference to Figures 3 to 8 showing the present invention as an embodiment in more detail as follows.

Figure 3 is an exemplary view showing the installation position of the variable stabilizer of the present invention, Figure 4 is an enlarged perspective view of the variable stabilizer of the present invention, Figure 5 is a perspective view of the link gear of the present invention, Figure 6 Schematic diagram showing the operation of the variable stabilizer of the vehicle according to an embodiment of the present invention, Figure 7 (a) (b) and 8 (a) (b) is a perspective view and a cross-sectional view showing the operating state of the present invention.

In FIG. 3, the stabilizer 1 is mounted to the vehicle body 4 via a fixing rod 3 that is integrally assembled with the mounting bush 2.

The stabilizer 1 is divided into two stabilizer bars 10 and 20 and mounted to the vehicle body 4, respectively, as shown in FIGS. 4 to 6, and one end of the stabilizer bar 10. The external gear 11 is formed therein, and at one end of the other stabilizer bar 20, the stabilizer bar joint 30 is integrally formed with the torsional rigidity of the two stabilizer bars 10 and 20 and different stiffness. The internal gear 31 is formed to be interconnected with the external gear 11.
At this time, since the stabilizer bar joint 30 integrally formed at one end of the other stabilizer bar 20 cannot be formed integrally from the beginning because the torsional stiffness is different as described above, each of them is separately manufactured and then welded to them. It must be integrated.

The two stabilizer bars 10 and 20 are engaged with each other via the link gear 40 to transfer torque while simultaneously sliding.
The link gear 40 is a hollow cylindrical shape for engaging the inner and outer gears 11 and 31 of the stabilizer bar 10 and the stabilizer bar joint 30 on one side, and the inner and outer gears 41 on the inner and outer peripheral surfaces thereof. 42 are formed respectively, and two stabilizer bars 10 and 20 having different torsional stiffness by adjusting the engagement position between the two stabilizer bar 10 and 20 with the stabilizer bar joint 30. And by the stabilizer bar joint 30 is to change the torsional strength of the stabilizer.

Meanwhile, in FIG. 6, the hydraulic drive unit 80 is driven by the oil supply unit 70 which switches the flow of oil in response to the signals of the speed sensor 50 and the steering angle sensor 60. ) To make the sliding position change.

The oil supply means 70, the oil pump 71 and the oil reservoir 72 for pumping and supplying and recovering oil, and the hydraulic drive unit 80 to selectively induce the supply of oil to the other while the other It is determined whether or not to turn by the signal input from the direction switching valve 73 and the speed sensor 50 and the steering angle sensor 60 to switch the oil flow path to recover the oil of the side of the oil pump 71 It consists of a control unit 74 for controlling the flow path connection direction of the drive and the directional valve 73.

The control unit 74 determines the speed and turning of the vehicle by the signals input from the speed sensor 50 and the steering angle sensor 60, and then the direction change valve 73 is operated by the valve operating mechanism 75. The oil is supplied and recovered, and the control unit 74 is operated by receiving power from the storage battery 76.

The hydraulic drive unit 80 is a mounting bracket 81 for fixing the stabilizer bar joint 30 to the vehicle body 4, and is fixed to the mounting bracket 81 to the oil supply means 70. It is composed of a hydraulic actuator 82 for driving to convert the engagement position of the link gear 40.

At this time, the position arm 90 is rotatably assembled to the mounting bracket 81 through the shaft pin 91, and then both ends of the position arm 90 are connected to the link gear 40 and the hydraulic actuator 82, respectively. By sliding the link gear 40 in accordance with the operation of the hydraulic actuator 82 to change the engagement position, and for the connection between the mounting bracket 81, the position arm 90, the position arm 90 and The shafts 83 of the link gear 40, the position arm 90, and the hydraulic actuator 82 are connected to the shaft pins 91 and the connecting pins 40a and 83a, respectively. Forming long holes 92 and 93 to which the connecting pins 40a and 83a are connected, respectively, to allow the position arm 90 to rotate smoothly as the shaft 83 moves forward and backward, and the position arm 90 According to the rotational movement of the link gear 40 to smoothly move in the front and rear directions.

In the embodiment of the present invention, one side of the link gear 40 is extended to protrude and form the connecting pins 40a on the upper and lower portions, respectively, and the connecting pins 83a on the upper and lower ends of the shaft bar 83 of the hydraulic actuator 82. ) Are formed to protrude from each other, and both ends of the position arm 90 connected to each of the connecting pins 40a and 83a are opened up and down, respectively, to form a "c" shape, so that the connection operation between each other is made safely.

Referring to the operation of the present invention configured as described above is as follows.

The oil pumped by the oil pump 71 is supplied to the hydraulic actuator 82 by operating the direction switching valve 73 through the valve operating mechanism 75 according to the signal input in FIG. 6, which is a hydraulic actuator 82. The shaft 83 is inundated according to the flow of oil into and out of the shaft, and the shaft 83 and the link gear 40 are operated by the rotation of the position arm 90 connected thereto when the shaft 83 is in and out of the shaft. The link gear 40 slides left and right by the seesaw operation.
In the present invention, the seesaw operation of the shaft bar 83 and the link gear 40 by the position arm 90 means that the position arm 90 is moved to the link gear when the shaft bar 83 of the hydraulic actuator 82 is moved forward. The position arm 90 moves the link gear 40 forward when the 40 is moved rearward and the shaft bar 83 of the hydraulic actuator 82 is moved backward.
That is, in the present invention, the position arm 90 is freely installed on the mounting bracket 81 through the shaft pin 91, and the shaft pin 91 when the shaft bar 83 of the hydraulic actuator 82 is moved forward. One end connected to the shaft bar 83 is moved forward while the other end connected to the link gear 40 is moved rearward while the link gear 40 slides backward. .
When the shaft bar 83 of the hydraulic actuator 82 is moved to the rear, the position arm 90 rotates in the opposite direction about the shaft pin 91, and one end connected to the shaft bar 83 is moved to the rear, and at the same time, the link is moved. The other end connected to the gear 40 is moved forward, and thus the link gear 40 is slid forward.
In the present invention, the connecting pin 40a of the link gear 40 and the connecting pin 83a of the shaft 83 are connected to the long holes 92 and 93 formed at both ends of the position arm 90, and the shaft 83 is formed. Position arm 90 can be rotated smoothly according to the forward and backward movement of the, and the link gear 40 can be smoothly moved back and forth in accordance with the rotational movement of the position arm (90).

For example, when the two stabilizer bars 10 and 20 have a higher torsional strength than the stabilizer bar joint 30, the link gear 40 is pushed into the stabilizer bar joint 30 according to the above-described operating principle. When inserted, the gap between the two stabilizer bars 10, 20 is narrowed by the engagement position of the link gear 40, resulting in a larger length configuration of the two stabilizer bars 10, 20 and a stabilizer bar. The length configuration of the joint 30 becomes smaller, which increases the torsional strength of the stabilizer. On the contrary, when the link gear 40 is pulled out of the stabilizer bar joint 30, the engagement position of the link gear 40 is caused. The gap between the two stabilizer bars 10, 20 increases, resulting in a smaller length configuration of the two stabilizer bars 10, 20 and a larger length configuration of the stabilizer bar joint 30. The torsional strength of the villaiser becomes smaller.

Of course, the controller 74 receiving the signals of the speed sensor 50 and the steering angle sensor 60 determines the driving situation and whether the vehicle body is rolled, and adjusts the direction of the direction switching valve 73 while simultaneously adjusting the flow rate and adjusting time. Since the length of the shaft rod 83 of the operating hydraulic actuator 82 is controlled so that the engagement position of the link gear 40 is variable.

Therefore, when the vehicle is turning at high speed, the roll of the body is large, so the torsional strength of the stabilizer can be increased to further reduce the roll, and when driving on a rough road, the torsional strength of the stabilizer can be reduced to reduce the body roll due to the vibration of the tire. Since it can reduce the driving stability, driving stability and ride comfort can be secured.

As described above, the present invention enables the torsional rigidity of the stabilizer to be appropriately changed according to the straight and turning driving of the vehicle, so that the torsional strength is increased when turning at high speed, and the torsional strength is increased when driving straight and rough roads. It is effective in improving steering stability, driving stability, and riding comfort.

Claims (6)

delete Two stabilizers with different torsional stiffness in a stabilizer of a vehicle in which the stabilizer bar is connected to the left and right wheels to elastically twist when a height difference between the left and right wheels occurs, thereby reducing the inclination of the vehicle body by the elastic restoring force. Variable stabilizer of the vehicle characterized in that the torsional strength of the stabilizer is variable by varying the length ratio of the two stabilizer bars by adjusting the engagement position by receiving the signals of the speed sensor and the steering angle sensor by connecting the riser bars with each other. To The engagement means of the two stabilizer bars may include an external gear formed at one end of one stabilizer bar and an external gear formed integrally with the torsional rigidity of the two stabilizer bars at one end of the other stabilizer bar and a different rigidity. Stabilizer bar joints with internal gears formed so as to be interconnected with each other, and hollow cylindrical inner and outer gears on inner and outer circumferential surfaces, respectively, engaged with the inner and outer gears of the two stabilizer bars for sliding torque at the same time. Link gear for varying the torsional strength of the stabilizer by adjusting the engagement position of the two stabilizer bar joints and the stabilizer bar joint, oil supply means for switching the flow of oil in response to signals from the speed sensor and the steering angle sensor, and oil supply By sliding the oil into and out of the link gear Variable stabilizer of the vehicle, characterized in that composed of a hydraulic drive unit for converting the engagement position. The method of claim 2, The oil supply means includes: an oil pump and an oil reservoir for pumping oil and supplying and recovering oil, and switching oil flow paths to recover the other oil while selectively inducing supply of oil to either side of the hydraulic driving unit. Variable stabilizer of the vehicle, characterized in that the control unit for controlling the flow path connection direction of the drive and the direction switching valve of the oil pump by determining whether to turn by the signal input from the direction switching valve, the speed sensor and the steering angle sensor. . The method of claim 2, The hydraulic drive unit is characterized by consisting of a mounting bracket for fixing the stabilizer bar joint to the vehicle body and a hydraulic actuator fixed to the mounting bracket and driven by the oil supply means to change the engagement position of the link gear. Variable stabilizer for vehicles. The method according to claim 2 or 4, After assembling the position arm to the mounting bracket freely through the shaft pin, the both ends of the position arm are connected to the link gear and the hydraulic actuator to slide the link gear according to the driving of the hydraulic actuator to change the engagement position. A variable stabilizer for a vehicle. The method of claim 5, wherein Vehicles characterized in that the seesaw of the link gear connecting pin and the hydraulic actuator shaft connecting pin are formed at both ends of the position arm, respectively, so that the seesaw operation of the hydraulic actuator shaft and the link gear is smoothly performed by the rotation of the position arm. Variable stabilizer.

Images