JPH07315244A - Alignment adjusting device for double wishbone suspension - Google Patents

Abstract

PURPOSE:To provide an alignment adjusting device for double wishbone suspension whereby the reliability of construction can be maintained and the adjustment work of camber angle and caster angle can be made easily. CONSTITUTION:In a double suspension, an eccentric cam mechanism 9 which moves a rubber bush 8 adjustably in lateral direction of a vehicle is provided between rubber bushes 8 and fender aprons 11 connected to the front and rear inner ends of an upper amt 7. Because the eccentric cam mechanism 9 is installed at the upper arm 7 to which a small load is applied from a wheel 2, a load applied to the eccentric cam mechanism 9 is reduced, reliability of construction is increased, lifting up of a vehicle body is not required since an adjusting part is located over the vehicle body, and thus a workability can be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile double wishbone suspension, and more particularly to an alignment adjusting device for adjusting a camber angle and a caster angle.

[0002]

2. Description of the Related Art As a suspension for an automobile, a housing that rotatably supports wheels is connected to an outer end that is swingably supported by a vehicle body and that extends substantially in the vehicle width direction. A lower arm and a pair of rubber bushes, each of which has an outer end swingably connected to the housing and an inner end that is disposed in the front-rear direction of the vehicle body at two locations, a front inner end and a rear inner end. A double wishbone suspension having an upper arm swingably connected to a vehicle body is widely used.

In such a suspension, in order to adjust the camber angle and the caster angle, as shown in a plan view schematically illustrating in FIG. 5, a housing having an outer end 21a rotatably supporting a wheel 22 (see FIG. (Not shown) is swingably connected to the vehicle body through a pair of rubber bushes 23a, 23b disposed in the vehicle front-rear direction at two locations, the inner end being the front inner end 21b and the rear inner end 21c. An eccentric cam mechanism (not shown) for adjusting the rubber bushes 23a, 23b in the vehicle width direction is attached to a mounting portion between the rubber bushes 23a, 23b of the lower arm 21 swingably supported by (not shown) and the vehicle body. The front and rear inner ends 21b and 21 of the lower arm 3 are provided by moving and adjusting the rubber bushes 23a and 23b in the vehicle width direction by the eccentric cam mechanism.
It is carried out by moving c in the vehicle width direction.

As a prior art of a suspension alignment adjusting device using an eccentric cam mechanism, for example, there is one disclosed in Japanese Utility Model Publication No. 58-617. In this alignment adjusting device, the body side ends of front and rear arms that laterally connect a wheel support that rotatably supports a wheel to a vehicle body are attached to a bracket whose position can be adjusted in the front-rear direction by a cam mechanism. The toe is adjusted by rotating the toe in the front-rear direction.

[0005]

In order to adjust the camber angle and caster angle of the above suspension,
The camber angle and the caster angle can be changed by moving and adjusting the rubber bush supporting the front inner end and the rear inner end of the lower arm to the vehicle body in the vehicle width direction. However, since the rubber bush supporting the inner end of the lower arm to which a large load is input from the wheel is connected to the vehicle body via the eccentric cam mechanism, it is not preferable from the viewpoint of ensuring structural reliability, Further, since the eccentric cam mechanism that serves as an adjusting unit is arranged in the lower portion of the vehicle body, it is necessary to lift up the vehicle body and adjust from below the vehicle body during alignment adjustment, which causes trouble such as troublesome adjustment work. is there.

Therefore, an object of the present invention is to provide an alignment adjusting device for a double wishbone suspension which can ensure the structural reliability and can easily adjust the camber angle and the caster angle.

[0007]

An alignment adjusting device for a double wishbone suspension according to the present invention, which achieves the above object, comprises a housing for rotatably supporting a wheel and an inner end rotatably supported by a vehicle body. A lower arm having an outer end extending substantially in the vehicle width direction swingably connected to the housing, and a lower arm having an outer end swingably connected to the housing and an inner end including a front inner end and a rear inner end. In a double wishbone suspension having an upper arm swingably connected to the vehicle body through a pair of rubber bushes respectively arranged in the vehicle front-rear direction at a location, the rubber bush supporting the upper arm is It is equipped with a mounting bolt that is fixed to a cylindrical member to which the cylinder or outer cylinder is fitted and that extends in a substantially vertical direction. The mounting bolt is adjusted in the vehicle width direction. It is characterized in that attached to the vehicle body via the ability eccentric cam mechanism.

[0008]

The rubber bushes supporting the front inner end and the rear inner end of the upper arm where the input load from the wheel is relatively small are connected to the vehicle body through the eccentric cam mechanism, so that they are input to the eccentric cam mechanism. Load is reduced, structural reliability can be ensured, and the eccentric cam mechanism that serves as an adjustment unit is provided on the upper portion of the vehicle body. Therefore, it is not necessary to lift up the vehicle body and workability can be improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an alignment adjusting device for a double wishbone suspension according to the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a main part of this embodiment, FIG. 2 is a plan view of an upper arm used in this embodiment, and FIG.
FIG. 4 is an enlarged view of part A of FIG. 1, and FIG. 4 is a plan view of relevant parts from the direction of arrow B of FIG.

In the figure, reference numeral 1 is a housing for rotatably supporting a wheel 2. The lower end of the housing 1 has an inner end 3
A is swingably connected to the vehicle body by a rubber bush 4 and is swingably connected to an outer end 3b of a lower arm 3 extending substantially in the vehicle body width direction via a ball joint 5.

The upper end of the housing 1 is a ball joint 6
Is connected to the outer end 7a of the upper arm 7 via. As shown in FIG. 2, the upper arm 7 has an A-V shape in plan view, and an inner end thereof is separated into a front inner end 7b and a rear inner end 7c which are spaced from each other in the vehicle front-rear direction. .

The front inner end 7b and the rear inner end 7c of the upper arm 7 are respectively provided with two rubber bushes 8 and 8 and an eccentric cam mechanism 9 (only one of the eccentric cam mechanisms is shown) spaced apart in the longitudinal direction of the vehicle body. It is connected to the fender apron 11 that forms the side wall of the engine room of the vehicle body. Note that reference numeral 1
Reference numeral 2 is a reinforcement that cooperates with the fender apron 11 to form an upper frame 8 having a closed cross-sectional shape that extends in the vehicle front-rear direction along the engine room.

The rubber bush 8 supporting the front inner end 7b and the rear inner end 7c of the upper arm 7 includes an outer cylinder 8a, an inner cylinder 8b concentrically loosely fitted in the outer cylinder 8a, and these outer cylinders 8a and 8b.
a rubber-like elastic body 8c interposed in the gap between a and the inner cylinder 8b by vulcanization adhesion or press fitting,
The front inner end 7b to the rear inner end 7c are connected to each other by a bolt 19 penetrating the inner cylinder 8b.

The eccentric cam mechanism 9 for mounting the rubber bush 8 on the fender apron 11 has an outer cylinder 8a of the rubber bush 8.
A mounting bolt 10 whose base end is joined by welding or the like,
A slot 11a for bolt insertion extending in the vehicle width direction formed in the fender apron 11, a bolt insertion hole 14a at a disc-shaped portion eccentric from the center, and a tool engaging portion 14c projecting polygonally, for example, in a polygonal shape on the upper surface. Eccentric cam 1 that has a hole and overlaps with the bolt insertion slot 11a of the fender apron 11.
4 and a peripheral edge 1 of the eccentric cam 14 that is substantially U-shaped in a plan view and that is superimposed on the bolt insertion slot 11a of the fender apron 11
4b is provided with a pair of guide portions 15a, 15a that abut against the inside and outside of the vehicle body in the width direction of the vehicle body. The guide plate 15 is fixed to the fender apron 11 and the fender apron 11 is inserted into the opening 12a formed in the reinforcement 12. Slotted hole 1 for bolt insertion that is inserted from the spacer 13 that abuts the lower surface of the bolt and is sequentially opened to the fender apron 11.
1a, a nut and a washer 17 that are screwed into the mounting bolt 10 that penetrates the bolt insertion hole 14a of the eccentric cam 14.

Next, the operation of adjusting the camber angle and the caster angle in the alignment adjusting device configured as described above will be described.

First, the inner end 3a of the lower arm 3 connected to the lower end of the housing 1 via a ball joint 5.
Is connected to the vehicle body via a rubber bush 4, and the outer end 7a is connected to the upper end of the housing 1 via a ball joint 5. The front inner end 7b and the rear inner end 7c of the upper arm 7 are made of rubber. The suspension is temporarily attached to the vehicle body by temporarily connecting it to the fender apron 11 of the vehicle body via the bushes 8 and 8.

Temporary joining of the front inner end 7b and the rear inner end 7c of the upper arm 7 to the vehicle body is accomplished by the same joining work. Therefore, only the case of temporarily joining the front inner end 7b will be described. Then, the upper arm 7
Of the bolt 19 that is previously inserted into the inner cylinder 17 at the front inner end 7b of the
The rubber bush 8 is joined and prepared by.

A mounting bolt 10 having a proximal end coupled to an outer cylinder 8a of a rubber bush 8 coupled to a front inner end 7b of the upper arm 7 is inserted into an opening 12a of a reinforcement 12 so that a lower surface of a fender apron 11 is secured. It is inserted from the spacer 13 which is inserted into the above and is made to project upward from the bolt insertion slot 12a opened in the fender apron 11.

Subsequently, the eccentric cam 1 is attached to the mounting bolt 9 protruding from the bolt insertion slot 12a onto the fender apron 11.
4 is inserted into the bolt insertion hole 14a, and the peripheral edge 14b of the eccentric cam 14 is superposed on the fender apron 11 so as to contact the guide portions 15a, 15a of the guide plate 15 provided on the fender apron 11, and the washer 15 is further interposed. By attaching the nut 16 to the mounting bolt 9, the front inner end 7b of the upper arm 7 is attached to the fender apron 1.
1 is temporarily connected to the bush 1 through the bush 8 and the eccentric cam mechanism 9.

The rear inner end 7c of the upper arm 7 is also temporarily connected to the fender apron 11 like the front inner end 7c.

As described above, the front and rear inner ends 7b and 7c of the upper arm 7 are temporarily connected to the fender apron 11 and are located on both sides of the front inner end 7b and the rear inner end 7c. The eccentric cam 14 of the eccentric cam mechanism 9 is rotated by engaging a tool, for example, a wrench with the tool engaging portion 14c, and moving the bolt insertion hole 14a of the eccentric cam 14 in the vehicle body width direction C. Is moved in the vehicle width direction C along the bolt insertion elongated hole 11a formed in the fender apron 11, the bushes 8, 8 are moved in the vehicle width outer direction C, and the front inner end connected to the bushes 8, 8 is moved. 7
b and the rear inner end 7c, and hence the ball joint 6 provided at the outer end 7a of the upper arm 7, is attached to the outer direction C of the vehicle body.
Move to.

Therefore, the housing 1 supporting the wheels 2 is
The ball joint 5 provided at the outer end 3b of the lower arm 3 is tilted in the vehicle body outward direction C about the swing center so that the camber angle is in the positive direction, and similarly, the front inner end 7b and the rear inner end 7c side. Eccentric cam 1 of both eccentric cam mechanism 9 located at
The mounting bolt 10 is turned into a long hole 11 for bolt insertion by the rotation of 4.
The camber angle can be adjusted in the negative direction by moving in the vehicle body inward direction D along a.

Further, in the same manner as described above, the eccentric cam 14 of the eccentric cam mechanism 9 located on the front inner end 7b side in the temporarily engaged state is rotated to move the mounting bolt 10 in the vehicle body width outward direction C, that is, the front inward direction. By moving the end 7b outward in the vehicle width direction C and moving the rear inner end 7c in the vehicle width inward direction D by the same operation, the upper arm 7 is rotated in a substantially horizontal plane to move the upper arm 7 outward. The caster angle can be adjusted in the negative direction by moving the ball joint 6 provided at the end 7a toward the rearward direction E of the vehicle body.

On the contrary, by rotating the eccentric cam 14 of the eccentric cam mechanism 9 located on the front inner end 7b side, the front inner end 7b is moved in the vehicle width direction D and the rear outer end 7c is moved by the same operation. The upper arm 7 is moved by moving in the vehicle body width direction C.
The caster angle can be adjusted in the positive direction by moving the ball joint 6 provided at the outer end 7a of the vehicle toward the front direction F side of the vehicle body.

After adjusting the camber angle and the caster angle to appropriate states by the above adjusting work, the eccentric cam mechanisms arranged on the front inner end 7b and the rear inner end 7c of the upper arm 7 respectively. By fully tightening the nut 16 that engages with the mounting bolt 10 of No. 9, the alamout adjustment is completed.

In the above description, the case where the alignment adjustment of the camber angle and the caster angle is performed after the suspension is temporarily attached to the vehicle body has been described. However, the alignment adjustment of the camber angle and the caster angle is performed after the suspension is completely attached to the vehicle body. Even when performing the alignment, alignment adjustment can be performed by temporarily loosening the nut 16 of the eccentric cam mechanism 9 and performing the adjustment work similar to the above. Further, without directly connecting the base end of the mounting bolt 19 to the outer cylinder 8a of the rubber bush 8 by welding or the like, the mounting bolt 10 is provided on the cylindrical member into which the outer cylinder 8a is fitted, and the rubber bush 8 is mounted via the cylindrical member. It can be configured to be mounted.

[0028]

According to the alignment adjusting device for a double wishbone suspension according to the present invention described above, the eccentric cam mechanism serving as the alignment adjusting device is connected to the front inner end and the rear inner end of the upper arm with rubber. Since it is interposed between the bush and the vehicle body, the load from the wheel input to the eccentric cam mechanism is greatly reduced compared to the conventional lower arm with the eccentric cam mechanism, and the structural reliability is improved. Since the eccentric cam mechanism to be improved and located to be adjusted is located above the vehicle body, the adjustment work can be performed by simply opening the engine hood or the like without lifting up the vehicle body, which improves workability. It has unique effects such as being obtained.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of an embodiment of an alignment adjusting device for a double wishbone suspension according to the present invention.

FIG. 2 is a plan view of an upper arm used in this embodiment.

FIG. 3 is an enlarged view of part A in FIG.

FIG. 4 is a plan view of a main part from the direction of arrow B in FIG.

FIG. 5 is a plan view of relevant parts for explaining conventional alignment adjustment.

[Explanation of symbols]

 1 Housing 2 Wheels 3 Lower Arm 3a Inner End 3b Outer End 7 Upper Arm 7a Outer End 7b Front Inner End 7c Rear Inner End 8 Rubber Bushing 8a Outer Tube 8b Inner Tube 9 Eccentric Cam Mechanism 10 Mounting Bolt 11 Fender Apron 11a Bolt insertion slot 14 Eccentric cam 14a Bolt insertion hole 14b Edge 15 Guide plate 15a Guide 16 Nut

Claims (2)

[Claims] 1. A housing that rotatably supports a wheel, a lower arm that has an inner end swingably supported by a vehicle body, and an outer end that extends substantially in the vehicle width direction that is swingably connected to the housing. One end is swingably connected to the housing, and the inner end is swingable on the vehicle body through a pair of rubber bushes arranged in the vehicle front-rear direction at two locations, a front inner end and a rear inner end. In a double wishbone suspension having an upper arm that is operably connected, the rubber bush that supports the upper arm is a mounting bolt that is fixed to an outer cylinder of the rubber bush or a cylindrical member into which the outer cylinder fits and that extends in a substantially vertical direction. The alignment adjustment of the double wishbone suspension characterized in that the mounting bolt is connected to the vehicle body through an eccentric cam mechanism that is adjustable in the vehicle width direction. apparatus. 2. An eccentric cam mechanism, wherein a bolt insertion elongated hole formed in a vehicle body and extending in the vehicle width direction and the mounting bolt which is superimposed on the bolt insertion elongated hole and penetrates the bolt insertion elongated hole are inserted. 2. An alignment adjusting device for a double wishbone suspension according to claim 1, further comprising a disc-shaped eccentric cam having a bolt insertion hole, and a guide plate provided on a vehicle body capable of contacting at least a part of a peripheral edge of the eccentric cam.