JPH09267617A - Stabilizer for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change rolling rigidity of a car body by a member arranged in a car body part having a margin of space, by making a drive source move a movable support member relatively displaceably supporting right/left mounting parts of a cross bar part. SOLUTION: Right/left mounting parts of a cross bar part 30 are supported on a car body respectively through a support unit. A turn disk 42 journalled through a bearing 41 in the periphery in a casing 40 is provided in the support unit, in the turn disk 42, a support hole 42a eccentrically placed from its rotational center 0 is formed. A minor shaft 44 of mounting part is journalled through a needle type bearing 43 in the support hole 42a, the casing 40 is fixed to the car body so as to make an axial line of the minor shaft 44 face the lateral direction. A stabilizer is divided into three parts, a cross bar part 30 and right/ left lever parts 31, the lever 31 is serration-fit connected to cross direction external end part of the minor shaft 44, to its cross direction internal end part, the cross bar part 30 is connected by serration fitting. In this way, when the turn disk 42 is turned, the cross bar part 30 is vertically displaced from a neutral position.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a stabilizer device for a vehicle.

[0002]

2. Description of the Related Art Stabilizers are separated from each other in the left-right direction.
A substantially U-shape having a horizontal bar portion that is rotatably supported by the vehicle body at a mounting portion of a location, and bent lever portions at both left and right ends of the horizontal bar portion that tilt with the relative displacement of the left and right wheels with respect to the vehicle body. It is formed in a letter shape, and when the relative displacement amount of the wheel with respect to the vehicle body is different between the left and right wheels, a reaction force due to the twist of the horizontal bar portion is generated, and it functions to regulate the rolling angle of the vehicle body during cornering or the like.

[0003] Conventionally, it is known that a cylinder is provided at a connecting portion between a lever portion of a stabilizer and a wheel so that the cylinder can be freely selected between a state in which its expansion and contraction operation is permitted and a state in which it is disabled. (See JP-A-64-56220). With this model, the stabilizer twists by the difference in the amount of displacement of the left and right wheels when the cylinder cannot be expanded or contracted, but when the cylinder is allowed to expand or contract, the difference in the amount of displacement of the left and right wheels is absorbed by the expansion and contraction of the cylinder. Has been
The stabilizer is less twisted to the left, and the rolling rigidity of the car body is reduced. Conventionally, the left and right mounting portions of the horizontal bar portion of the stabilizer are rotatably fitted and supported by a rubber bush fixed to the vehicle body via a bracket.

[0004]

In the above-mentioned conventional example, the connecting portion between the lever portion of the stabilizer for arranging the cylinder and the wheel is a complicated place where the suspension member of the wheel is arranged, so that the assembly and maintenance are difficult. It is troublesome, and since the entire cylinder is displaced together with the wheels with respect to the vehicle body, there is a problem that the arrangement of the piping for the cylinder becomes troublesome.

In view of the above points, an object of the present invention is to provide a stabilizer device capable of changing the rolling rigidity of a vehicle body by means of a member arranged in a vehicle body portion having a sufficient space.

[0006]

Means for Solving the Problems In order to solve the above problems,
According to the present invention, the horizontal bar portion that is rotatably supported by the vehicle body at the two mounting portions that are separated in the left-right direction, and the left and right ends of the horizontal bar portion that tilts with the relative displacement of the left and right wheels with respect to the vehicle body. A pair of left and right movable supports for supporting the left and right mounting portions of the horizontal bar portion relative to the vehicle body so as to be relatively displaceable in a direction in which the tilt angle of the lever portion is increased or decreased. A member and a drive source that moves each movable support member to displace each mounting portion relative to the vehicle body are provided.

When the mounting portion of the horizontal bar portion of the stabilizer is relatively displaced with respect to the vehicle body, the reaction force due to the torsion of the horizontal bar portion when the displacement amount of the left and right wheels is changed due to the change of the tilt angle of the lever portion. Changes, and the rolling rigidity of the vehicle body changes.

Since the mounting portion of the horizontal bar portion is located in a space-wise space away from the suspension member, the movable support member for supporting the mounting space also has a space in space and the assembly is possible. And maintenance will not be hindered. In addition, since the drive source that moves the movable support member can be fixed to the vehicle body, the wiring of the drive source can be simplified.

By the way, a rubber bush may be attached to the movable support member so that the attachment portion of the lateral rod portion is rotatably fitted and supported by the rubber bush. Even if the stabilizer simply tries to rotate without being twisted by the input of the same phase, the frictional force between the stabilizer and the rubber bush becomes a resistance against the rotation of the stabilizer, that is, the movement of the wheels, which causes deterioration of the riding comfort. Therefore, it is desirable that each mounting portion be axially supported by each movable supporting member via a bearing so that the stabilizer can be rotated without receiving a frictional force.

Conventionally, the stabilizer is formed by bending a rod into a U-shape, and since the required torsional rigidity and axle distance are different for each vehicle model, a dedicated stabilizer is prepared for each vehicle model. There is. In this case, each mounting portion is configured by a short shaft supported by each movable supporting member, the stabilizer is divided into three parts into a horizontal bar portion and left and right lever portions, and each lever portion is supported by each movable supporting member. If you connect to the lateral outer end of the short axis and the left and right ends of the horizontal bar to the lateral inner end of the short axis supported by each movable support member, you can change the horizontal bar only. Since it is possible to cope with the difference in the torsional rigidity and the axle distance for each vehicle type, the movable support member and the lever portion can be shared regardless of the vehicle type, which is advantageous in terms of cost.

It should be noted that when the vehicle is traveling straight ahead in the middle and high speed ranges, it is possible to improve the riding comfort by absorbing the shock caused by the unevenness of the road surface by the independent movement of the suspensions of the left and right wheels. In this case, when straight traveling at a predetermined vehicle speed or more, if each mounting portion is relatively displaced with respect to the vehicle body in the direction of decreasing the tilt angle of the lever portion, the straight rod is twisted during the straight traveling in the medium and high speed range. The reaction force is reduced, the suspension on each of the left and right wheels moves better, and the riding comfort is improved.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, reference numeral 1 is a wheel, which is suspended on a vehicle body A via a suspension 2. The suspension 2 is a double wishbone suspension having an upper arm 2a, a lower arm 2b, a knuckle 2c, and a damper 2d.

Although only one wheel 1 is shown in FIG. 1, the wheels 1 are provided on the left and right sides, and a stabilizer 3 is arranged between the left and right wheels 1. The stabilizer 3 is composed of a horizontal rod portion 30 rotatably supported by two mounting portions that are separated from each other in the left-right direction on the vehicle body A, and bent lever portions 31 and 31 at both left and right ends of the horizontal rod portion 30. ing. Then, each lever portion 31 is connected with a constituent member of the suspension 2 of each of the left and right wheels 1, for example, a lower arm 2b via a connecting rod 32, and the vehicle body A of each of the left and right wheels 1 is connected.
The respective lever portions 31 are tilted in the vertical direction in accordance with the relative displacement with respect to the horizontal rod portion 30 when the relative displacement amount of the wheel 1 with respect to the vehicle body A becomes different.

The left and right mounting portions of the horizontal rod portion 30 are supported by the vehicle body A via the support units 4, respectively. As shown in FIGS. 2 and 3, the support unit 4 includes a casing 40 and a rotating plate 42 axially supported in the casing 40 via a bearing 41 on the outer periphery. By forming a support hole 42a that is eccentric from the center 0,
A short shaft 44, which is a mounting portion, is rotatably supported by a needle type bearing 43 in 2a, and the casing 40 is fixed to the vehicle body A so that the axis of the short shaft 44 is directed in the lateral direction.

The stabilizer 3 is divided into three parts, that is, a horizontal rod portion 30 and left and right lever portions 31 and 31. The lever portion 31 is connected to the lateral outer end portion of the short shaft 44 by serration fitting, and at the same time, it is short. The horizontal rod portion 30 is connected to the inner end portion of the shaft 44 in the horizontal direction by serration fitting. Thus, when the turntable 42 is turned, the horizontal bar portion 30 is vertically displaced from the neutral position (the position shown in FIG. 2) at the same level as the rotation center 0 of the turntable 42.

In the casing 40, the worm 4 driven by a drive source 45 including an electric motor and a hydraulic motor.
6 is pivotally supported, and teeth 42b that mesh with the worm 46 are formed on the outer peripheral surface of the turntable 42 over a predetermined angle range, and the turntable 42 is turned by the drive source 45 to move laterally. The rod portion 30 is vertically displaced with respect to the vehicle body A. In the figure, 47 is a bearing for the worm 46, 48 is a holding nut for the bearing 47, and the nut 48 is prevented from loosening by a washer 48a with a claw.

FIG. 4 shows the lever portion 3 caused by the displacement of the horizontal rod portion 30.
1 shows the change of the tilting angle of No. 1, and the tilting angles of the lever portion 31 when the horizontal bar portion 30 exists in the neutral position N, the lower position L and the upper position U are αN, αL and αU, respectively, and αU
<ΑN <αL. Here, the torsional torque of the horizontal bar portion 30 is T, the vertical reaction force acting on the lower arm 2b from the lever portion 31 via the connecting rod 32 is F, and the lever portion 3 is
If the length of 1 is la and the tilt angle of the lever portion 31 is α, then F = T / la · cos α. Therefore, the reaction force F due to the torsion of the horizontal rod portion 30 when a difference in the displacement amount of the left and right wheels occurs, increases when the horizontal rod portion 30 is displaced downward, and decreases when the horizontal rod portion 30 is displaced upward. To do.

The drive source 45 is controlled by the controller 5 composed of a microcomputer in the procedure shown in FIG. In detail, first, it is determined whether or not the vehicle is turning (S1), and when the vehicle is turning, it is determined whether the lateral G is equal to or more than a predetermined value Gs (S2). If G ≧ Gs, The drive source 45 is operated to displace the horizontal rod portion 30 downward according to the size of the horizontal G (S3). According to this, the reaction force F due to the torsion of the horizontal rod portion 30 becomes large, the rolling rigidity of the vehicle body becomes high, and the stability at the time of turning improves.

If G <Gs, the drive source 45 is operated to return the horizontal rod portion 30 to the neutral position (S4). Further, when traveling straight ahead, it is determined whether or not the absolute value of the difference between the displacement amount DR of the right wheel and the displacement amount DL of the left wheel is a predetermined value Ds or more (S5), and | D
When R-DL | ≧ Ds, it is determined whether the vehicle speed V is equal to or higher than a predetermined value Vs (S6). If | DR-DL | <Ds, or if | DR-DL | ≧ Ds and V <Vs, the process proceeds to the step S4 to return the horizontal rod portion 30 to the neutral position.

| DR-DL | ≧ Ds, and V
When ≧ Vs, the drive source 45 is operated to displace the horizontal rod portion 30 upward according to the magnitude of | DR-DL | (S7). According to this, the reaction force F due to the torsion of the horizontal bar portion 30 becomes small, and the suspensions 2 for the left and right wheels are formed.
Will follow the unevenness of the road surface and move independently and with good responsiveness, which will improve the riding comfort when traveling straight in the middle-high speed range.

When the left and right wheels are input in phase from the road surface, the horizontal rod portion 30 simply rotates without twisting. In the present embodiment, the horizontal bar portion 30 is pivotally supported on the rotating plate 42 via the bearing 43 at the short shaft 44 that is the mounting portion thereof, so that the horizontal bar portion 30 smoothly rotates without receiving frictional force. To do. Therefore, the left and right wheels move smoothly without receiving resistance and the riding comfort is improved.

Further, in the present embodiment, the torsional rigidity and length of the stabilizer 3 can be changed by changing the horizontal bar portion 30. Therefore, it becomes possible to deal with vehicle models having different required torsional rigidity and axle distance by only changing the horizontal bar section 30, and the support unit 4 and the lever section 31 can be shared regardless of the vehicle model, and the cost due to the sharing of parts. Can be down.

In the above embodiment, the turning plate 42 is used as the movable supporting member for supporting the horizontal bar portion 30 so as to be relatively displaceable with respect to the vehicle body. However, the swinging arm that is swingably attached to the vehicle body is movable. A supporting member may be used, and the swing arm may be spaced from the swing center to rotatably support the mounting portion of the horizontal rod portion 30.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a device of the present invention.

2 is a cutaway side view of a support unit included in the apparatus of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a diagram showing a change in a tilt angle of a lever portion due to a displacement of a horizontal bar portion.

FIG. 5 is a flowchart showing a procedure for controlling the displacement of the horizontal bar portion.

[Explanation of symbols]

 1 Wheel 2 Suspension 3 Stabilizer 30 Horizontal Bar Part 31 Lever Part 4 Support Unit 42 Rotating Plate (Movable Support Member) 43 Bearing 44 Short Shaft (Mounting Part) 45 Drive Source

Claims (4)

[Claims] 1. A horizontal rod portion rotatably supported by a vehicle body at two mounting portions which are separated from each other in the left-right direction, and left and right portions of the horizontal rod portion which tilt with the relative displacement of the left and right wheels with respect to the vehicle body. In a structure provided with a stabilizer having bent lever portions at both ends, a pair of left and right movable members that support the left and right mounting portions of the horizontal bar portion relative to the vehicle body so as to be relatively displaceable in a direction in which the tilt angle of the lever portion is increased or decreased. A stabilizer device for a vehicle, comprising: a support member; and a drive source that moves each movable support member to relatively displace each mounting portion with respect to the vehicle body. 2. The stabilizer device for a vehicle according to claim 1, wherein each mounting portion is axially supported by each movable support member via a bearing. 3. Each mounting portion is composed of a short shaft supported by each movable support member, and the stabilizer is divided into a horizontal bar portion and left and right lever portions, and each lever portion is supported by each movable support member. The lateral outer end of the short shaft is connected, and the left and right ends of the horizontal bar are connected to the lateral inner end of the short shaft supported by each movable support member. Item 3. The vehicle stabilizer device according to Item 1 or 2. 4. The vehicular stabilizer device according to claim 1, wherein each of the mounting portions is relatively displaced with respect to the vehicle body in a direction in which a tilt angle of the lever portion is reduced when the vehicle is traveling straight ahead at a predetermined vehicle speed or more.