JPS5842165Y2 - Vehicle height adjustment device for leaf spring suspension vehicles - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle height adjustment device for a vehicle with leaf spring suspension.

Conventionally, in leaf spring suspension systems for automobiles, etc., when both ends of the leaf spring are attached to the car body, the left and right height of the car body is This causes a problem in which the vehicle body tilts.

In order to eliminate this problem, it would be possible to improve the manufacturing accuracy of each part, but as quality improvements increase costs,
This does not completely eliminate the tilt of the vehicle body.

Therefore, a vehicle height adjustment device has been proposed that corrects the tilt of the vehicle body by adjusting the mounting position of the leaf spring when the vehicle body tilts. One end of the leaf spring is supported on the vehicle body through a lever, and an adjustment screw is provided at the other end of the lever to regulate the rotational position of the lever, and the lever is rotated by operating the adjustment screw. This is provided to adjust the mounting height of the leaf spring to correct discrepancies in vehicle height on the left and right sides of the vehicle body.

(Refer to Japanese Utility Model Publication No. 37-12107.) However, the above-mentioned vehicle height adjustment device requires a lever and an adjustment screw, and has the disadvantage that the structure is complicated and expensive.

In addition, in order to correct the longitudinal position of the vehicle's axle, the left and right brackets that support the leaf spring via the support shaft are provided with adjustment pieces that eccentrically support the support shaft. Device for adjusting position (1977-
12616 and Utility Model Application Publication No. 51-85911) have also been proposed, but these have the drawback that they require a pair of left and right adjustment pieces, making the structure and correction work complicated.

The present invention aims to eliminate the above-mentioned conventional drawbacks and provide a vehicle height adjustment device for a vehicle with a leaf spring suspension, which allows the vehicle height to be adjusted with a simple structure without increasing the number of parts.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 6, a vehicle body 2 and wheels 3 of a vehicle 1 are shown.
A suspension device using a plate spring 4 is interposed between the iron plate spring 4 and the iron plate spring 4, which is made up of a plurality of metal flat plates 5 having successively different lengths, which are stacked together and connected by a holding band 6 or the like so that they do not separate. Eyeball-shaped attachment ends 7a are provided at both ends of the longest flat plate 5a (main plate) at the top.

7b are provided respectively.

A body frame 8 extending in the front-rear direction is provided on both sides of the lower part of the vehicle body 2, and at the lower part of the body frame 8 there are brackets s and i for attaching leaf springs 4 in the front and rear.

is welded.

A support shaft 11 inserted through the mounting end 7a of the leaf spring 4 is fixed to one bracket 9 by a mounting plate 12, and the mounting end 7a is supported.
0, the leaf spring coupling pin 13 inserted into the other end attachment end 7b of the leaf spring 4 is connected to the vehicle body coupling pin 1 via the shank 14.
5, and the mounting end 7b is supported so that the span can be adjusted by deformation of the leaf spring 4, and both end portions 7a and 7b of the leaf spring 4 are connected to the vehicle body 2, respectively.

Further, an axle casing 16 that supports the wheels 3 from side to side is supported at the center of the leaf spring 4 by connection of U bolts 17, and a suspension device that cushions and supports the vehicle body 2 is constituted by the leaf spring 4. The devices are similarly provided on the left and right sides of the vehicle body 2.

One end of the plate spring 4 is attached to the support shaft 11 on the vehicle body 2.
One of the brackets 9 supported through the bracket 9 is provided with a substantially U-shaped cross section, and an upper surface portion 9a is fixed to the lower surface of the vehicle body frame 8 by welding. Both side mounting portions 9b and 9c are arranged on the left and right sides of the mounting end portion 7a.

One mounting portion 9b (on the right side in FIG. 2) has a non-circular hole 18 with an elongated shape elongated in the vertical direction at approximately the center thereof.
The other mounting portion 9c (left side in FIG. 2) is provided with a semicircular notch 19 removed from below at the center of the lower part.

The outer periphery of a circular protrusion 12a protruding from the center of the mounting plate 12, which will be described later, is fitted into the notch 19.

Also, the front and rear (fourth
A through hole 20 to which the mounting plate 12 is attached is bored on the left and right sides in the figure.

Further, the support shaft 11 has a head portion 11a larger than the non-circular hole 18 of the bracket 9 at one end, and a tightening screw portion screwed into the mounting pad 21 at the other end opposite to the head portion 11a. 11b is formed, and the non-circular hole 18 of the bracket 9 is adjacent to the head 11a and has an oval cross section.
An adjustment part 11c is provided which can be fitted into the support shaft 11 and is eccentric in the vertical direction orthogonal to the axis of the support shaft 11. When the adjustment part 11c and the non-circular hole 18 are fitted, the support shaft 11 cannot rotate. The vertical position of the axis of the support shaft 11 can be changed by rotating the fitting direction of the adjustment part 11c by 180 degrees and changing the vertical position.

Further, the mounting plate 12 that connects the support shaft 11 and the mounting portion 9c of the bracket 9 is provided in a substantially diamond shape, and has a circular protrusion 12a with a circular protrusion at the center. The outer diameter of the portion 12a and the inner diameter of the semicircular notch 19 of the bracket 90 are the same and are formed so that they can fit together.

A support shaft mounting hole 22 is bored in this circular protrusion 12a at a position vertically eccentric from the circular center, and the eccentricity of the support shaft mounting hole 22 is equal to the eccentricity of the adjustment portion 11c of the support shaft 11. The hole diameter is the same as that of the tightening screw part 1 of the support shaft 11.
1b is large enough to be inserted.

Further, the outer part of the circular protruding part 12a is formed into a mounting surface part 12b that contacts the outer surface of the mounting part 9c of the bracket 9, and furthermore, there are circular protruding parts 12a on the front and rear (left and right in FIG. 4) of the mounting surface part 12b. Through holes 23 and 23 are provided facing each other with the mounting plate 12 positioned at the bracket 9 and forming a mounting adjustment portion 12c for mounting the mounting plate 12 on the bracket 9.

The mounting screws 24 are inserted into the through holes 23, 23, and are mounted by screwing together with the Nand 25.If the mounting plate 12 is rotated 1800 times and mounted upside down, the support shaft can be mounted. The vertical position of the hole 22 changes.

In the connection structure between the bracket 9 and the leaf spring 4 using the support shaft 11 and the mounting plate 12, the mounting end 7a of the leaf spring 4 inserted into the bracket 9 is fitted with a split outer sleeve 26 or Rubber bushings 27 fixed by baking are attached to both sides of the mounting end 7a, and an inner sleeve 28 is inserted into the rubber bushing 2f.

The rubber bushing 27 has a collar 27a with a large diameter on the outside and in contact with the side surface of the mounting end 7a of the leaf spring 4. The mounting plate 120 is in pressure contact with the inner surface of the circular protrusion 12a, but when the mounting plate 120 is not in pressure contact in the pre-assembly state where the mounting pad 21 is not tightened, this flange 27
The a end surface is formed to protrude outward from the end of the inner sleeve 28, and the support shaft 1 is disposed within the inner sleeve 28.
1 can be inserted.

After the mounting end 7a of the leaf spring 4 with the rubber bush 27 attached as described above is inserted, the support shaft 11 is attached to the bracket 9.
is inserted into the non-circular hole 18 and the inner sleeve 28 from one of the mounting parts 9b, passes through the support shaft mounting hole 22 of the mounting plate 12, and the tightening screw part 11b projects to the other side,
The adjustment portion 11c of the support shaft 11 is fitted into the non-circular hole 18.

In this state, the mounting adjustment parts 12c on both sides of the mounting plate 12
Align the through hole 23 of the bracket 9 with the through hole 20 of the mounting part 9C of the bracket 9, insert the mounting screw 24 into both feed holes 20 and 23, screw the nut 25 and tighten it, and then tighten the collar part 2 of the rubber bush 27.
After compressing and deforming 7a and assembling the mounting plate 12 to the bracket 9, attach the mounting pad 2 to the tightening screw portion 11b of the support shaft 11.
1 is screwed together and tightened to complete the connection.

At this time, the vehicle height can be adjusted by selecting the vertical direction for assembling the support shaft 11 and the mounting plate 12.

That is, in the case shown in the figure, the vehicle height is adjusted to a high position, and the support shaft 11 is fitted into the non-circular hole 18 with the adjustment part 11c eccentrically upward so that its axis is at a low position. On the other hand, the mounting plate 12 is also mounted so that the eccentric support shaft mounting hole 22 is located at a low position, and the distance between the support shaft 11 and the vehicle body frame 8 is increased, and the vehicle body 2 is located at a high position. Supported by

On the other hand, from the state shown in the figure, the support shaft 11 and mounting plate 12 are
Rotate the support shaft 11 by 80° to reverse the vertical position, eccentrically lower the adjustment portion 11c of the support shaft 11, and fit it into the non-circular hole 18. At the same time, assemble the shaft center of the support shaft 11 at a high position, the mounting plate 12
When installed so that the support shaft mounting hole 22 is at a high position,
The distance between the support shaft 11 and the vehicle body frame 8 is shortened, and the vehicle body 2 is supported at a low position.

The amount of vehicle height adjustment is 2 of the amount of eccentricity of the adjustment portion 11c of the support shaft 11.
The vehicle height is adjusted by the left and right leaf springs 4 of the vehicle body 2, and the heights of the vehicle body frame 8 are made equal on the left and right sides.

Next, FIG. 7 shows a modified example, in which the mounting plate 29 of this example has a circular protrusion 29a in which a support shaft mounting hole 22 is bored.
Attachment adjustment portions 29c, 29c provided before and after the circular protrusion 29a on the attachment surface portion 29b on the outer side of the mounting surface portion 29b.
One side is formed by a through hole 23 into which a mounting screw 24 is inserted, and the other side is formed by a projecting pin 30 that projects from the back side.

The protruding pin 30 is inserted into one of the through holes 20 bored at the front and rear of the bracket 9, and by aligning the other feed holes 20 and 23 and tightening the mounting screw 24, the mounting plate 29 The bracket 9 is positioned and attached to the bracket 9, which simplifies the attachment work.

Therefore, according to the present invention as described above, it is possible to adjust the vehicle height by rotating the assembly position of the support shaft and the mounting plate by 180 degrees, and it is possible to adjust the vehicle height by rotating the assembly position of the support shaft and the mounting plate by 180 degrees. The inclination can be easily corrected with a simple structure, the quality and dimension control of each part can be eased and workability can be improved, and the structure and adjustment work of the vehicle height adjustment device itself is simple. Combined with this, it has moderate practical advantages such as reduced costs.

[Brief explanation of drawings]

The drawings illustrate the embodiment of the present invention, and FIG. 1 is an overall side view, FIG. 2 is an enlarged sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is a right side view of FIG. 2. Fig. 4 is a left side view of the same, Fig. 5 is a sectional view taken along the line It is a perspective view from the back side showing a modification. 1...Vehicle, 2...Vehicle body, 3...
...Wheels, 4...Plate springs, 7a, 7b...
...Mounting end, 8...Vehicle frame, 9,1
0...Bracket, 9a...Top part,
9b, 9c...Mounting part, 11...Support shaft, 11a...Head, 11b...Tightening screw part, Ilc...・Adjustment section, 12, 29...
...Mounting plate, 12a. 29a...Circular protrusion, 12b, 29b...
...Mounting surface part, 12c, 29c...Mounting adjustment part, 18...Non-circular hole, 19...Notch part, 20...Through hole , 21... Mounting hole, 22... Support shaft mounting hole, 23...
・Through hole, 24...Mounting screw, 25...↓...
Nando, 26...Outer sleeve, 27...
...Rubber butt, 2Ta...Brim, 2
8...Inner sleeve, 30...Protruding pin.

Claims (1)

[Scope of utility model registration request] In a vehicle with leaf spring suspension, a bracket is provided on the vehicle body to support the leaf spring via a support shaft at the mounting end, and a non-circular hole in the vertical direction is provided in one of the mounting portions of the bracket arranged on the left and right sides of the leaf spring. At the same time, a semicircular notch is provided on the other side of the mounting part into which the outer periphery of a circular protrusion protruding from the center of the mounting plate connecting the support shaft and the mounting part can be fitted; A rubber bush is provided in the center, which has a collar that fits into the mounting end of the spring and contacts the side surface of the mounting end of the leaf spring, into which a support shaft can be inserted, and the support shaft has a non-circular hole in the bracket. an adjustment part that can be fitted into the support shaft and is eccentric in the vertical direction from the axis of the support shaft, a head adjacent to the adjustment part and larger than the non-circular hole, and an end formed on the opposite side of the head. and a tightening screw portion of a mounting plate that is screwed into the mounting nut, and the mounting plate has a support shaft mounting hole eccentrically provided in the vertical direction of a circular protrusion that presses against the end of the rubber bush; a mounting surface that contacts the outer surface of the bracket;
At the front and back of the mounting surface part, mounting adjustment parts are provided with circular protrusions in the center and the mounting plate is positioned and mounted on the bracket.
A vehicle height adjustment device for a leaf spring suspension vehicle, characterized in that the vehicle height is adjusted by assembling a support shaft and a mounting plate by rotating them 1800 times.