JP2004076834A - Bushing attaching/detaching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bushing attaching/detaching device allowing easy replacement of a bushing without removing a whole stabilizer from a vehicle. <P>SOLUTION: The bushing attaching/detaching device comprises locking means 1 for supporting the whole attaching/detaching device and locking it near the attached/detached bushing 20 and thrusting means 8 using reaction on the side of an arm portion 12 for thrusting an outer cylinder portion 21 of the attached/detached bushing 20 in the attaching/detaching direction. The locking means 1 consists of first and second pieces 2, 3 opposed to each other in the direction of attaching/detaching the bush 20 with the arm portion 12 therebetween. The first and second pieces 2, 3 are connected to a thrusting means supporting material 6 supporting the thrusting means 8 via a frame material 5. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bush attaching / detaching device for attaching / detaching a bush pressed into an arm portion of a stabilizer or the like used in a vehicle.
[0002]
[Prior art]
FIG. 6 shows an example of a stabilizer provided in a vehicle suspension device. In the illustrated example, the torsion bar 11 side of the stabilizer 10 is fixed parallel to the axle A (by a method not shown), and arms 12, 12 are fixed to both ends of the torsion bar 11 in a U-shape as described later. The distal end is fixed to a bracket 15 projecting downward from a vehicle body (chassis frame) C via bushes 20 and 20, respectively.
[0003]
When the vehicle is tilted (rolled) in the left-right direction, the distance between the axle A and the vehicle body C changes in the left-right direction. Therefore, the left and right arms 12, 12 move in the up-down direction. Since the difference is rotated about the axis of the torsion bar to absorb the difference, the torsion bar 11 is twisted, and a force for restoring the inclination of the vehicle is exerted by the reaction force.
[0004]
FIG. 7 shows an example of the stabilizer 10. In this example, the torsion bar 11 has a tubular shape and is partially curved in order to avoid interference. The arms 12, 12 fixed to both ends are plate-shaped, and a collar 12a is welded to a tip end thereof, and a bush 20 which is engaged with the bracket 15 on the vehicle body side is press-fitted into the inner diameter of the collar 12a. It is supposed to be.
[0005]
An example of the bush 20 is shown in FIGS. An elastic body (rubber) 23 is interposed between an outer cylinder portion 21 and an inner cylinder portion 22 each made of steel, and a pin 24 is fitted to the inner diameter of the inner cylinder portion 22. Is press-fitted into the inner diameter of the collar portion 12a of the arm 12, and pins 24 projecting to both sides are bolted to the bracket 15.
[0006]
In the bush 20 configured as described above, the elastic body 23 performs an action of absorbing the impact force, absorbing the rotation of the arm 12 and a change in the horizontal distance due to the rotation of the arm 12, and the like. It is necessary to replace the battery due to its life.
[0007]
Conventionally, in such replacement of the bush 20, the pin 24 is removed from the bracket 15, the entire stabilizer 10 is removed from the vehicle (axle), and is carried to a place of a detachment tool such as a press, where the bush is detached. . Therefore, it is necessary to carry out the work of detaching and transporting the entire stabilizer and to carry it, and it is difficult to carry out the work due to its shape, so that much labor and man-hours are required, and there are also safety problems.
[0008]
Conventionally, Japanese Unexamined Patent Application Publication No. 2001-71279 has been disclosed as a tool for attaching and detaching such a bush. This technique uses a screw to attach and detach the bush, requires a large amount of labor, and cannot solve the above problem.
[0009]
[Problems to be solved by the invention]
It is an object of the present invention to provide a bush attaching / detaching device capable of easily performing bush replacement without removing the entire stabilizer from a vehicle, which addresses the above-described problem.
[0010]
[Means for Solving the Problems]
A bush attaching / detaching device according to the present invention is a bush attaching / detaching device for attaching / detaching a bush press-fitted into an arm portion such as a stabilizer used in a vehicle. Locking means, and pressing means for pressing the outer cylindrical portion of the detachable bush in the detaching direction by taking a reaction force on the arm portion side, wherein the locking means detachably attaches and detaches the detachable bush to each other across the arm portion. The first and second pieces are provided to face each other in a direction, and the first and second pieces are connected to a pressing means supporting member for supporting the pressing means by a frame material. . (Claim 1)
[0011]
In the present invention, the first and second pieces of the locking means are each provided with an inner diameter portion for fitting the outer periphery of the collar portion into which the arm bush is press-fitted. (Claim 2)
[0012]
Further, in the present invention, the frame member connecting the locking means and the pressing means support member is fastened to the first and second pieces by fastening means that is easy to assemble. (Claim 3)
That is, the frame member is configured such that the first and second pieces are fastened with the arm portion therebetween by means of a fastening means such as a bolt or a screw which can be easily assembled, so that the apparatus can be easily assembled and removed.
[0013]
Further, in the present invention, a guide hole is provided in the second piece on the pressing means side of the locking means, an adapter is slidably fitted in the guide hole, and one end of the adapter abuts the pressing means, The other end is formed in a shape that abuts the pin portion of the detachable bush and abuts on the outer cylindrical portion. (Claim 4)
[0014]
In the present invention, the pressing means is a jack mounted on a vehicle. (Claim 5)
[0015]
In the removal of the bush according to the present invention, first, the bush pin side of the stabilizer arm is detached from the bracket to make the arm freely rotatable. And fastening with a frame material, assembling the pressing means, and locking the device to the bush portion. Then, the adapter is brought into contact with the outer cylindrical portion of the detachable bush through the guide hole of the second piece, and is pressed by the pressing means to remove the bush.
[0016]
Similarly, the bush is assembled by mounting the device on the bush portion of the arm, inserting the mounted bush into the guide hole of the second piece, inserting the adapter behind (on the side opposite to the arm), and pressing the bush. The bush is pressed into the predetermined position by pressing by means.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a state in which the bush attaching / detaching device 1 of the present invention is mounted on a bush press-fitting portion of a stabilizer arm 12. In the illustrated state, the pin 12 which is bolted to the bracket 15 of the stabilizer 10 in FIG. 6 is removed to make the arm 12 free to rotate, and the collar 12a of the arm 12 is a first locking means from both sides. The state before the bush 20 is removed is shown in a state where the bush 20 is attached while being sandwiched between the second pieces 2 and 3.
[0018]
FIG. 2 shows an example of the main part. First, on the first piece 2 on the right side of the figure, an inner diameter portion 2a to which an outer peripheral portion at one end side of the collar portion 12a is fitted, a step portion 2b to which an end portion of the collar portion 12a abuts to receive a reaction force, and A through hole 2c through which the removed bush passes is formed.
[0019]
The next second piece 3 is reduced in diameter by a step 3b from an inner diameter portion 3a in which the other end side of the collar portion 12a is fitted, facing the first piece 2, and the adapter 4 (and press-fitting). A guide hole 3c for guiding the bush 20) is formed.
[0020]
The adapter 4 is slidably fitted into the guide hole 3c of the second piece 3, and its tip 4a (right in the figure) comes into contact with the outer cylindrical portion 21 of the detachable bush 20, presses it, and projects. It is formed in a concave shape so as to avoid interference with the pin portion 24. The other end 4b is formed so that the tip of the jack 8 serving as the pressing means abuts.
[0021]
As shown in FIG. 3, a plurality of frame members 5 are attached to the outside of the first and second pieces 2 and 3 with bolts 7 so that the two pieces 2 and 3 are held at predetermined intervals. A jack (pressing means) support member 6 is attached to the other end of the frame 5 with a bolt 7.
[0022]
The jack 8 mounted on the vehicle is held by the jack supporting member 6, and the distal end of the jack 8 is configured to contact the adapter 4 to press the adapter 4.
[0023]
To remove the bush 20, the pin 24 side of the arm 12 is removed from the bracket 15, the arm collar portion 12a is sandwiched between the first and second pieces 2, 3 from both sides, the frame member 5 is assembled, and the apparatus 1 is mounted. . Then, as shown in FIG. 1, the distal end portion of the adapter 4 is brought into contact with the outer cylindrical portion 21 of the detachable bush 20 and is pushed by the jack 8 to push the bush 20 in the collar portion 13 rightward in the drawing. Remove as shown in FIG.
[0024]
In order to press-fit the bush 20, as shown in FIG. 5, the jack 8 is contracted, the bush 20 is pressed into the guide hole 3c of the second piece 3, and further pressed by the jack 8 from behind the collar portion 12a. Press into the specified position. Then, the device 1 is removed, and the pin portion 24 of the bush is attached to the bracket 15.
[0025]
【The invention's effect】
The present invention is configured as described above, and its operation and effect are described below.
(1) The bush can be attached and detached without removing heavy objects such as stabilizers into which the bush is press-fitted.
(2) Therefore, the work is safe and requires only a short time, and can be performed alone or repaired on the road.
(3) No hydraulic press is required because an in-vehicle jack is used.
(4) Since a reaction force is applied to the collar portion into which the bush is press-fitted and the bush outer cylinder portion is pressed, an unreasonable load is not applied to the arm and the like. (A thin arm is possible)
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional side view showing an embodiment of a bush attaching / detaching device of the present invention.
FIG. 2 is a sectional view showing a main part of the bush attaching / detaching device of the present invention.
FIG. 3 is a side view showing a frame member.
FIG. 4 is a side view showing a state where the jack is operated from FIG. 1 to remove a bush;
FIG. 5 is a side view showing a state in which a bush is set for attachment.
FIG. 6 is a side view showing an attached state of the stabilizer.
FIG. 7 is a plan view and a side view showing a stabilizer.
FIG. 8 is a front view showing an example of a bush.
FIG. 9 is a side view of FIG. 8;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Bush attaching / detaching apparatus 2 ... 1st piece 3 ... 2nd piece 4 ... Adapter 5 ... Frame material 6 ... Jack support material 8 ... Jack 10 ... Stabilizer 11, torsion bar 12, arm 12a, collar 15, bracket 20, bush 21, outer cylinder 22, inner cylinder 23, elastic body 24, etc. ..Pin portion A: axle C: body (chassis)

Claims (5)

In a bush attaching / detaching device for attaching / detaching a bush press-fitted into an arm portion such as a stabilizer used in a vehicle, locking means for supporting the entire attaching / detaching device and engaging near a detachable bush, and an arm portion side Pressing means for pressing the outer cylindrical portion of the attached / detachable bush in the attaching / detaching direction by taking a reaction force, and the locking means is provided opposite to each other in the attaching / detaching direction of the attached / detachable bush with the arm portion interposed therebetween. A bush detaching device comprising a first piece and a second piece, wherein the first piece and the second piece are connected to a pressing means supporting member for supporting the pressing means by a frame material. The bush detaching device according to claim 1, wherein the first and second pieces of the locking means are provided with inner diameter portions for fitting the outer periphery of the collar portion into which the bush of the arm is press-fitted. 3. The bush detaching device according to claim 1, wherein the frame member that connects the locking means and the pressing means support material is fastened to the first and second pieces by fastening means that is easy to assemble. A guide hole is provided in the second piece on the pressing means side of the locking means, an adapter is slidably fitted in the guide hole, and the adapter has one end in contact with the pressing means and the other end has a detachable bush. The bush attaching / detaching device according to any one of claims 1 to 3, wherein the bush attaching / detaching device is formed in a shape avoiding the pin portion and abutting on the outer cylindrical portion. The bush detaching device according to any one of claims 1 to 4, wherein the pressing means is a jack mounted on a vehicle.

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