JP4148399B2 - Bush desorption device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bush detaching device for detaching a bush press-fitted into an arm portion such as a stabilizer 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 in parallel to the axle A (in a method not shown), and arms 12 and 12 are fixed in a U-shape at both ends of the torsion bar 11 as described later. The front end portion is engaged with a bracket 15 projecting downward from the vehicle body (chassis frame) C via bushes 20 and 20, respectively.
[0003]
When the vehicle is tilted (rolled) in the left-right direction, the stabilizer device configured as described above changes the distance from the vehicle body C in the left-right direction of the axle A. Therefore, the left and right arms 12, 12 are Since the difference is rotated around the torsion bar axis and absorbed, the torsion bar 11 is twisted, and the reaction force causes a force to restore the inclination of the vehicle.
[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 to avoid interference. Also, the arms 12 and 12 fixed at both ends are plate-like, and a collar 12a is welded to the tip, and a bush 20 that engages with a bracket 15 on the vehicle body is press-fitted into the inner diameter of the collar 12a. It has come to be.
[0005]
An example of the bush 20 is shown in FIGS. An elastic body (rubber) 23 is interposed between the outer cylinder part 21 and the inner cylinder part 22 each made of steel, and a pin 24 is fitted to the inner diameter of the inner cylinder part 22. Is pressed into the inner diameter of the collar portion 12 a of the arm 12, and the pins 24 protruding to both sides are bolted to the bracket 15.
[0006]
The bush 20 configured as described above has an effect that the elastic body 23 absorbs shock force, absorbs the rotation of the arm 12 and the change in the horizontal distance, and the like. It will be necessary to replace it depending on 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 it is carried to a removal tool such as a press where the bush is removed. . Accordingly, the entire stabilizer is required to be attached and detached and transported, and because of its shape, the work is difficult to perform, requiring a lot of labor and man-hours, and there are also safety problems.
[0008]
Conventionally, Japanese Patent Laid-Open No. 2001-71279 has been disclosed as a tool for removing and attaching such a bush. This technique uses a screw to attach and detach the bush, requires a lot of labor, and cannot solve the above problems.
[0009]
[Problems to be solved by the invention]
An object of the present invention is to provide a bush detaching device that can deal with the above-mentioned problems and can easily replace the bush without removing the entire stabilizer from the vehicle.
[0010]
[Means for Solving the Problems]
The bush detaching device according to the present invention is press-fitted into the inner diameter portion of the collar portion 12a provided at the tip of the arm 12 of the stabilizer provided in the suspension device of the vehicle, and between the outer cylinder portion 21 and the inner cylinder portion 22. In the bush detaching device for detaching the bush 20 in which the pin 24 fastened to the vehicle body C side is press-fitted to the inner cylinder portion 22 with the elastic body 23 interposed therebetween, the entire bush detaching device 1 is used as the collar of the arm. There is a locking means to be mounted on the portion 12a, and the locking means comprises a first piece 2 and a second piece 3 that sandwich the collar portion 12a from both sides thereof. An inner diameter portion 2a that fits the outer peripheral portion on one end side of the collar portion 12a, a step portion 2b that abuts the end portion of the collar portion 12a and receives a reaction force, and a through-hole portion 2c through which the removed bush passes. The second piece 3 has an inner diameter part 3a for fitting the outer peripheral part on the other end side of the collar part 12a, a step part 3b with which the end part of the collar part 12a abuts, and an adapter for pressing the detachable bush 20 The adapter 4 is formed with a guide hole 3c through which the adapter 4 slides, and the adapter 4 has a tip portion 4a that abuts against and presses the outer cylinder portion 21 of the detachable bush 20, and a concave portion 4c that avoids interference with the pin portion 24; The other end 4b with which the pressing means 8 abuts is formed, and a plurality of frame members 5 are assembled outside the first piece 2 and the second piece 3 to hold the pieces 2 and 3 at a predetermined interval. A pressing means supporting member 6 is attached to the other end of the frame member 5, and the tip of the pressing means 6 supported by the pressing means supporting member 6 is in contact with the adapter 4.
[0014]
In the present invention, the pressing means 8 is an in-vehicle jack.
[0015]
In the removal of the bush according to the present invention, first, the bush pin side of the stabilizer arm is removed from the bracket so that the arm can be rotated, and the first and second pieces are opposed to the both sides of the bush so that the inner diameter portion is the arm. Is fitted to the collar portion, fastened with a frame member, and the pressing means is assembled, and the device is locked to the bush portion. Then, the adapter is brought into contact with the outer cylinder 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]
The bush is assembled in the same way by attaching the device to the bush part of the arm, inserting the attached bush into the guide hole of the second piece, inserting an adapter behind it (on the opposite arm side), and pressing The bush is pressed into a predetermined position by pressing by means.
[0017]
DETAILED DESCRIPTION OF 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 bushing detaching device 1 of the present invention is attached to a bush press-fitting portion of a stabilizer arm 12. In this state shown in FIG. 6, the pin portion 24 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 portion 12a of the arm 12 is a first locking means from both sides. The bush 20 is shown in a state where it is sandwiched and attached between the second pieces 2 and 3 before the bush 20 is removed.
[0018]
FIG. 2 shows an example of the main part. First, the first piece 2 on the right side of the drawing has an inner diameter portion 2a for fitting the outer peripheral portion on one end side of the collar portion 12a, a step portion 2b that receives the reaction force by contacting the end portion of the collar portion 12a, and A through-hole portion 2c through which the removed bush passes is formed.
[0019]
In the next second piece 3, the diameter is reduced at the stepped portion 3 b from the inner diameter portion 3 a facing the first piece 2 and fitting the other end side of the collar portion 12 a, and the adapter 4 (and at the time of 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 the tip portion 4a (right side in the drawing) abuts against and presses the outer tube portion 21 of the detachable bush 20 and protrudes. It is formed in a concave shape so as to avoid interference with the pin portion 24. And the other end part 4b is formed so that the front-end | tip part of the jack 8 which is a press means may contact | abut.
[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 pieces 2 and 3 are held at a predetermined interval. A jack (pressing means) support 6 is attached to the other end of the frame 5 with a bolt 7.
[0022]
And the vehicle-mounted jack 8 is hold | maintained by the jack support material 6, and the front-end | tip part of the jack 8 is contact | abutted to the adapter 4, and is comprised so that the adapter 4 may be pressed.
[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 and 3 from both sides, the frame member 5 is assembled, and the apparatus 1 is mounted. . Then, as shown in FIG. 1, the front end of the adapter 4 is brought into contact with the outer cylinder portion 21 of the detachable bush 20 and pressed by the jack 8 to push out the bush 20 in the collar portion 13 to the right in the figure. Remove as shown in FIG.
[0024]
Further, the press-in of the bush 20 is performed by shrinking the jack 8 as shown in FIG. 5, inserting the bush 20 to be press-fitted into the guide hole 3c of the second piece 3, and pressing it with the jack 8 from the rear to press the collar portion 12a. Press-fit to a predetermined position. And the apparatus 1 is removed and the pin part 24 of a bush is attached to the bracket 15. FIG.
[0025]
【The invention's effect】
The present invention is configured as described above, and its effects are shown 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, it is a safe and short-time operation, and can be performed alone or repaired on the road.
(3) A hydraulic press is not required because an on-board 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 excessive load is not applied to the arm or 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 bushing detaching apparatus of the present invention.
FIG. 2 is a cross-sectional view showing the main part of the bushing detaching apparatus of the present invention.
FIG. 3 is a side view showing a frame member.
4 is a side view showing a state where the jack is removed from FIG. 1 by operating the jack. FIG.
FIG. 5 is a side view showing a state in which a bush is set for mounting.
FIG. 6 is a side view showing a state where the stabilizer is attached.
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.
9 is a side view of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Bush desorption 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 ..Pin part A ... Axle C ... Body (chassis)

Claims (2)

  It is press-fitted into the inner diameter part of the collar part (12a) provided at the tip of the stabilizer arm (12) provided in the suspension device of the vehicle, and between the outer cylinder part (21) and the inner cylinder part (22). In the bushing detaching apparatus for detaching the bush (20) in which the elastic body (23) is interposed and the pin (24) fastened to the vehicle body (C) side is press-fitted into the inner cylinder part (22). The bushing detaching device (1) has a locking means for mounting the entire collar part (12a) on the arm, and the locking means includes a first piece (2) sandwiching the collar part (12a) from both sides thereof. The first piece (2) includes an inner diameter portion (2a) for fitting the outer peripheral portion on one end side of the collar portion (12a), and an end of the collar portion (12a). Step part (2b) where the part abuts and receives the reaction force, and removal A through-hole part (2c) through which the bush passes is formed, and an inner diameter part (3a) for fitting the outer peripheral part on the other end side of the collar part (12a) to the second piece (3), and a collar part ( 12a) is formed with a stepped portion (3b) with which the end portion abuts and a guide hole (3c) in which the adapter (4) that presses the detachable bush (20) slides. The tip part (4a) that contacts and presses the outer cylinder part (21) of the desorption bush (20), the concave part (4c) that avoids interference with the pin part (24), and the pressing means (8) contact An end portion (4b) is formed, and a plurality of frame members (5) are assembled on the outside of the first piece (2) and the second piece (3), and both pieces (2, 3) are predetermined. The pressing means support member (6) is attached to the other end of the frame member (5). Bush desorber, wherein the tip of the pressing means is supported by the unit supporting member (6) (6) is in contact with the adapter (4).   The bush detaching device according to claim 1, wherein the pressing means is an in-vehicle jack.

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