JPH0537681Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a device that absorbs errors when mounting a suspension on a vehicle body or adjusting alignment. The present invention relates to an alignment adjustment device that allows adjustment in two directions.

[Prior art] As disclosed in Japanese Utility Model Application Publication No. 58-112604, etc., a suspension is attached to a vehicle body by rotating one side of a suspension arm that can swing vertically around an axis. This is done by attaching it movably to the vehicle body via an elastic bushing, and attaching the other side to the wheel side via an elastic bushing so that it can rotate around an axis.

When connecting via a bush, the bush mounting position can be adjusted to facilitate alignment adjustment or toe angle adjustment when mounting the suspension on the body, adjusting alignment, or adjusting the toe angle. It is desirable that Japanese Utility Model Publication No. 56-105410 proposes a method of using a cam bolt for adjustment in a direction perpendicular to the axis of the bush at a portion where the suspension arm and the vehicle body are connected via the bush.

[Problem to be solved by the invention] However, in the conventional technology, the position of the bush normally cannot be adjusted in the axial direction and the direction perpendicular to the axis. Even if the position can be adjusted in the direction perpendicular to the axis, the adjustment is only in the direction perpendicular to the axis; the position cannot be adjusted in the axial direction, and the structure is fixed by tightening nuts from both sides. It was on.

Therefore, with the prior art, the position of the bushing cannot be adjusted in one direction at most, and if this type of adjustment structure were simply applied in two directions, axially and perpendicularly to the axis, a large space would be required and the vehicle would not be able to adjust the position. There was a problem that it was unsuitable for installation.

An object of the present invention is to provide a structure that allows a bushing used to connect a suspension arm and a body to be adjusted in two directions: the direction of the bushing axis and the direction perpendicular to the bushing axis.

[Means for Solving the Problems] The alignment adjustment device according to the present invention for achieving the above object is applied to the bushing on the front end side of the suspension arm of the two bushings that connect the suspension arm and the vehicle body. This is an alignment adjustment device in which one of the suspension arm and the vehicle body is a first member, the other is a second member, and an inner cylinder and an outer cylinder are arranged between the first member and the second member. A bush connected by a rubber part is interposed, a shaft made of a single member having a threaded part is fixed to the first member, and the shaft is slidably inserted into the inner cylinder of the bush. The inner cylinder of the bush is fixed to the shaft so that its position can be adjusted in the axial direction of the bush by clipping it from both sides of the bush in the axial direction using a pair of nuts that are threaded onto the threaded part of the shaft.By changing the threaded position of the nuts on the shaft, the inner cylinder of the bush is fixed to the shaft in an adjustable manner in the axial direction of the bush. The alignment adjustment device further comprises a retainer that holds the outer cylinder of the bush and is connected to a second member via a cam device whose position can be adjusted in a direction perpendicular to the bush axis.

[Function] In the above alignment adjustment device of the present invention, when adjusting the bush position in the bush axial direction, loosen the nuts screwed onto the shaft on both sides of the bush in the axial direction. After adjusting the position, tighten the nut again to fix the axial position of the inner cylinder of the bush with respect to the shaft. Also, when adjusting the position of the bush in a direction perpendicular to the axial direction of the bush, loosen the bolt that fixes the retainer to the second member, rotate the cam around the bolt axis, and move the retainer to the second member. The position of the member in the direction perpendicular to the bush axis is adjusted, and then the bolt is tightened again to immovably fix the retainer, cam, and second member.
In this way, with the alignment adjustment device of the present invention, the bush position can be adjusted both in the bush axial direction and in a direction perpendicular to the bush axial direction.

Further, although bending force is applied to the bush on the front end side of the suspension alignment, since the shaft is constructed from a single member, it is advantageous in terms of durability against bending force.

[Embodiments] Hereinafter, preferred embodiments of the alignment adjustment device according to the present invention will be described with reference to the drawings.

1 and 2 show a cross section of the alignment adjustment device of the present invention, and FIG. 3 shows a rear suspension of a vehicle to which the alignment adjustment device of the present invention is applied.

In FIG. 3, reference numeral 1 denotes a swingable suspension arm that connects the vehicle body 2 and the axle 4 on the wheel 3 side. The suspension arm 1 is attached to the vehicle body 2 at two places with bushings 5 and 6.
It is rotatably connected to the axle 4 by bushes 7 and 8. Suspension arm 1 pushes 7 against axle 4,
When the rear end of the suspension arm is positioned by the bush 6 with respect to the vehicle body 2, the bush 5 at the front end of the suspension arm is positioned between the suspension arm 1 and the vehicle body 2.
It is desirable that the position can be adjusted so as to absorb errors in the connection portion between the bush 5 and the bush 5.
The alignment adjustment device of the present invention is applied to the bush 5. This bush is subjected to a bending force in the horizontal plane.

1 and 2 show the structure of an alignment adjustment device applied to a bush 5 in cross section. 1 and 2, a shaft 9 made of a single member extending in the direction of the bush axis is fixed to the suspension arm 1. As shown in FIGS. Constructing the shaft 9 from a single member is advantageous in terms of bending resistance. The shaft 9 extends further forward (or rearward) of the vehicle from the position of the suspension arm 1. The bush 5 has an inner cylinder 10, an outer cylinder 11 coaxial with the inner cylinder 10, and a rubber part 12 connecting the inner cylinder 10 and the outer cylinder 11. It also extends long in the direction of the bush axis. A shaft 9 fixed to the suspension arm 1 is slidably inserted through an inner cylinder 10 of the bush 5. The shaft 9 has screws 13 and 14 cut in the vicinity of both ends in the axial direction of the inner cylinder of the bush 5, and nuts 15 and 16 which are threaded into the inner surface of the cylindrical body are screwed into the screws 13 and 14, respectively. has been done. At both axial ends of the inner cylinder 10 of the bush 5, annular washers 17 and 18 are brought into contact with the axial end face of the inner cylinder 10, with a gap provided between them and the axial end face of the rubber portion 12. Nuts 15 and 16 fix the inner cylinder 10 of the bush 5 from both sides in the axial direction via washers 17 and 18, and fix the axial position of the bush 5 with respect to the shaft 9. By rotating and loosening the nuts 15 and 16, the position of the bush 5 relative to the shaft 9 can be changed, and by tightening the nuts 15 and 16 again, the position of the bush 5 relative to the shaft 9 is fixed. As a result, the axial direction of the bush 5 (first
(B direction in the figure) position can be adjusted.

The outer cylinder 11 of the bush 5 has a section extending around the outer cylinder 11 and over approximately a semicircle in a cross section perpendicular to the shaft 9, and parallel to the attachment part to the vehicle body 2 at both ends of the approximately semicircular part 19. A retainer 2 having extending portions 20 and 21 extending in a direction perpendicular to the shaft 9.
2 is fixed. The retainer 22 is secured by bolts 23 and 24 that pass through the vehicle body 2 and the extension parts 20 and 21 and nuts 25 and 26 that are screwed into the bolts 23 and 24 at the extension parts 20 and 21 at both ends. It is fixed to the vehicle body 2 when the nuts 23, 24 and nuts 25, 26 are tightened. The insertion holes for the bolts 23, 24 drilled in the vehicle body 2 fit with the outer shapes of the threaded portions of the bolts 23, 24 with no or almost no clearance, and the bolts 23, 24 drilled in the retainer 22 are inserted. The holes 27 and 28 are formed into elongated holes, and a cam, which will be described below, is provided between the inner peripheral surface of the insertion holes 27 and 28 in the long diameter direction and the outer shape of the threaded portion of the bolts 23 and 24 in the bush axial direction. A gap is provided that is sufficient to allow movement in the right angle direction (direction A in FIG. 1). Long hole 27,2
8 extends long in the direction perpendicular to the shift 9, and only an extremely small gap is provided in the axial direction of the shaft 9 to allow sliding between the outer diameters of the threaded portions of the bolts 23 and 24. As shown in FIG.
The cam 2
9 and 30 are interposed. The cams 29 and 30 are annular bodies, and bolts 23 and 24 are inserted through the inner periphery of the cams 29 and 30, respectively. The cams 29 and 30 are formed with a circular inner circumference and a circular outer circumference eccentric to each other. Storage recess 31, 3
It is rotatably in sliding contact with the inner circumferential surface of 2. When bolts 23 and 24 are loosened, retainer 22 and cam 2
9, 30, the fixation of the vehicle body 2 is released, and the cams 29, 30 can be rotated around the axes of the bolts 23, 24, whereby the shaft 9 between the retainer 22 and the vehicle body 2 When the bolts 23 and 24 are tightened again, the retainer 22 is positioned at right angles to the cams 29 and 30.
It is immovably fixed to the vehicle body 2 via. With this configuration, the position of the bush 5 can be adjusted in a direction perpendicular to the bush axis direction (direction A in FIG. 1).

Next, a description will be given of the operation related to position adjustment of the bush attachment part in the alignment adjustment device of the above embodiment.

The suspension arm 1 and the vehicle body 2 are connected via an elastic bushing 5, but if there is a difference between the mounting location of the bushing 5 on the suspension arm 1 and the mounting location of the bushing 5 on the vehicle body 2, the following The alignment is adjusted.

That is, in order to adjust the position of the bush 5 in the axial direction (direction B in FIG. 1), screw 1 of the shaft 9
3, 14 are loosened, and the axial position of the bush 5 with respect to the shaft 9 is adjusted by using the slide between the inner peripheral surface of the inner cylinder 10 of the bush 5 and the outer peripheral surface of the shaft 9, After that, tighten nuts 15 and 16, and washers 17 and 18.
The inner cylinder 10 of the bush 5 is fixed from both sides in the axial direction.

In addition, in order to adjust the position of the bush 5 in the direction perpendicular to the bush axis direction (direction A in FIG. 1), loosen the bolts 23 and 24 tightening the retainer 22 and the vehicle body 2. cam 2
9, 30, release the fixation of the vehicle body 2 to each other, turn the cams 29, 30 whose inner and outer circumferences are eccentric to each other, and adjust the position of the retainer 22 relative to the vehicle body 2 in a direction perpendicular to the bush axis direction; Then, the position of the bush 5 fixed to the retainer 22 is adjusted with respect to the vehicle body 2 in a direction perpendicular to the bush axial direction. After adjustment, tighten bolts 23 and 24.

In this way, the bushing 5 is structured so that alignment can be adjusted both in the bushing axial direction and in the direction perpendicular to the bushing axial direction. Toe-in adjustment can be easily performed.

Note that in the above, only one of the cams 29 and 30 is required. Also, the shaft 9 is on the suspension arm 1 side, and the retainer 22 is on the vehicle body 2 side.
Although a structure is shown in which the shaft 9 is fixed to the vehicle body 2 side, the same effect can be obtained even if the structure is reversed so that the shaft 9 is fixed to the vehicle body 2 side and the tellina 22 is fixed to the suspension arm 1 side.

[Effect of the invention] When using the alignment adjustment device according to the invention, when one of the suspension arm and the vehicle body is used as the first member and the other is used as the second member, the first member
The bush is fixed in an adjustable manner in the axial direction by a pair of nuts threaded onto the shaft, which is slidable between the shaft fixed to the inner cylinder of the bush, and a retainer fixed to the outer cylinder of the bush is fixed via a cam. Since the bushing is fixed to the second member so that its position can be adjusted in the direction perpendicular to the axial direction of the bushing, the position of the bushing attachment part can be adjusted in two directions: the axial direction and the direction perpendicular to the shaft, and this is achieved with a compact structure. You can get the effect that you can.

Further, although bending force is applied to the bush at the front end of the suspension arm, since the shaft is constructed from a single member, it is advantageous in terms of durability against bending force.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an alignment adjustment device according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a sectional view of an alignment adjustment device of an embodiment of the present invention. FIG. 3 is a plan view of the rear suspension when applied to the bush mounting portion of the vehicle. 1...Suspension arm, 2...Vehicle body, 5...Button, 9...Shaft, 10...
Inner cylinder, 11... Outer cylinder, 12... Rubber part, 13, 1
4...Screw, 15, 16...Nut, 17, 18
... Washer, 22... Retainer, 23, 24...
...Bolt, 25, 26...Natsu, 27, 28...
...Insertion hole, 29, 30...Cam, 31, 32...
Cam storage recess, A...direction perpendicular to the bushing axis direction, B...bushing axis direction.

Claims (1)

[Scope of utility model registration request] An alignment adjustment device that is applied to the front end side bushing of the suspension arm of two bushings that connect the suspension arm and the vehicle body, the alignment adjustment device including one of the suspension arm and the vehicle body being connected to a first member, and the other being a first member. is the second member, a bush in which the inner cylinder and the outer cylinder are connected by a rubber part is interposed between the first member and the second member, and the first member is made from a single member having a threaded part. The shaft is slidably inserted into the inner cylinder of the bush, and the inner cylinder of the bush is screwed onto the threaded part of the shaft. By changing the screwing position of the bush, the inner cylinder of the bush is fixed to the shaft so that its position can be adjusted in the direction of the bush axis, and the retainer that holds the outer cylinder of the bush is fixed to the shaft through a cam device whose position can be adjusted in the direction perpendicular to the bush axis. An alignment adjustment device characterized in that the alignment adjustment device is connected to a second member.