JP2002211458A - Shock absorber detaching and attaching method for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of easily detaching and attaching a shock absorber of a wheel suspension device for an automobile using a simple holder. SOLUTION: A connection bolt 13 inserted into an upper part sheet 10 on an upper end of a suspension coil spring 6 springing a control arm 3 downward from a lower part is screwed into a welding nut 14 of a sub frame 1. Both of upper and lower ends of the shock absorber 7 are connected to the sub frame 1 and the control arm 3. In when detaching and attaching the shock absorber 7, the connection bolt 13 is detached from the welding nut 14 with a body for supporting the sub frame 1 jacked up. Next, a bottom surface of the control arm 3 is covered with a receiving base 20, and a long shaft bolt 22 with its head part 22a abutted on a bottom surface of the receiving base 20 is screwed into the nut 14. Thus, compression deformation is imparted to the suspension coil spring 6 and the suspension coil spring 6 is prevented to be elongated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper seat that is locked to the upper end of a suspension coil spring that swings freely on a vehicle body and supports a wheel and that resiliently lowers a control arm.
In a motor vehicle in which upper and lower ends of a shock absorber for damping the vibration of the suspension coil spring are connected to a vehicle body and a control arm while a connecting bolt inserted from below into the upper seat is screwed to a nut fixed to the vehicle body, The present invention relates to a method of attaching and detaching the shock absorber for repair or replacement.

[0002]

2. Description of the Related Art Conventionally, when attaching and detaching the shock absorber, the bolt is detached from the nut while the body supporting the vehicle body is lifted by a lifter or the like, and then disclosed in Japanese Utility Model Laid-Open No. 2-125895. The control arm is lifted by a chain, a large jack, or the like to apply a compressive load to the suspension coil spring, and the shock absorber is detached while the suspension coil spring is prevented from being extended.

[0003]

However, it is difficult to apply the above-mentioned conventional method to a maintenance shop with few facilities.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been described by using a simple jig to apply a compressive load to the suspension coil spring to suppress the extension of the suspension coil spring. It is an object of the present invention to provide a method of attaching and detaching a shock absorber for an automobile, which can be made and the shock absorber can be easily attached and detached.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an upper seat provided on an upper end of a suspension coil spring for pivotally supporting a vehicle body to swing downward and a control arm supporting a wheel. The upper and lower ends of the shock absorber that attenuates the vibration of the suspension coil spring are connected to the vehicle body and the control arm by screwing the connection bolt inserted through the upper seat from below to the nut fixed to the vehicle body. In attaching and detaching the shock absorber, the connecting bolt is detached from the nut in a state where the vehicle body is lifted, and then a pedestal is applied to a lower surface of the control arm, and a head is attached to the lower surface of the pedestal. The suspension coil spring is compressed and deformed by tightening the contacted long-axis bolt into the nut, and the suspension coil spring is tightened. Characterized by suppressing the elongation. The vehicle body, wheels, control arm, and nut correspond to a subframe 1, a rear wheel 5, a lower control arm 33, and a welding nut 14 in an embodiment of the present invention, which will be described later.

According to the above feature, the use of the jig including the cradle and the long-axis bolt can suppress the extension of the suspension coil spring, thereby releasing the shock absorber from the load of the suspension coil spring. The shock absorber can be easily attached and detached without being affected by the load of the suspension coil spring.

[0007] Also, since the long shaft bolt is engaged with the existing nut of the vehicle body, the structure of the jig is simple. In addition, the jig compresses the suspension spring without contacting it. Therefore, the suspension coil spring can be prevented from being damaged.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on embodiments of the present invention shown in the accompanying drawings.

FIG. 1 is a rear view of a rear wheel suspension device of an automobile, FIG. 2 is a view corresponding to FIG. 1 showing a state of the rear wheel suspension device when a vehicle body is jacked up, and FIG. FIG. 1 shows a state in which the extension of a suspension coil spring of the rear wheel suspension device is suppressed.
FIG. 4 is a perspective view of the jig.

First, referring to FIG. 1, the general structure of a rear wheel suspension system for an automobile will be described.

A pair of left and right upper control arms 2 and a lower control arm 3 are mounted on a subframe 1 fixed to a rear lower surface of a body (not shown) of an automobile.
(Only the left side of each of the control arms 2 and 3 is shown in the figure). The upper and lower ends of the knuckle 4 are respectively supported at the free ends of the upper control arm 2 and the lower control arm 3. They are connected so as to be relatively rotatable vertically. The hub of the rear wheel 5 is fixed to the knuckle 4.

Between the sub-frame 1 and the lower control arm 3, a suspension coil spring 6 for resiliently lowering the lower control arm 3 with respect to the sub-frame 1;
A shock absorber 7 for damping the vibration of the suspension coil spring 6 is installed in parallel as follows.

An upper sheet 10 and a lower sheet 11 are fixed to both upper and lower ends of the suspension coil spring 6, and the lower sheet 11 is received by a cup-shaped retainer 12 fixed to the lower control arm 3. Upper sheet 1
0 indicates that the connecting bolt 13 passing through the
It is fixed to the sub-frame 1 by screwing it to the welding nut 14 on the upper surface.

On the other hand, the shock absorber 7 has a mounting flange 15 rubber-mounted on the upper end of the piston rod 7a and a mounting eye 16 fixed on the lower end of the cylinder 7b.
5 and a pair of front and rear connection bolts 17, 17 projecting from below on the upper surface of the
Screws 8 and 18 make the shock absorber 7
Are connected to the sub-frame 1. Mounting eye 1
6 is connected to the sub-frame 1 via a pivot bolt 19 extending in the front-rear direction.

Now, a method of attaching and detaching the shock absorber 7 in the rear wheel suspension device having the above configuration will be described with reference to FIGS.

To attach and detach the shock absorber 7, as shown in FIG.
A jig 23 composed of a long shaft bolt 22 penetrating through is used. The long bolt 22 is provided with a washer 24 on the lower surface of the cradle 20.
A male screw part 22 having a hexagonal head 22a at one end which is in contact with the
b is provided at the other end. The cradle 20 has a pair of positioning pins 25, which stand on one end side with the through hole 21 interposed therebetween so as to sandwich the lower control arm 3 from the front and rear, and have the lower control arm 3 inclined with the other end side. A projection-like receiving portion 26 that can abut on a high position on the lower surface is provided. Therefore, the cradle 20 can support the lower surface of the lower control arm 3 in a horizontal state.

To remove the left shock absorber 7, for example, first, as shown in FIG. 2, the left rear portion of the body (not shown) supporting the subframe 1 is jacked up. Accordingly, the suspension coil spring 6 extends while swinging the upper control arm 2 and the lower control arm 3 downward, and the extension of the suspension coil spring 6 is limited by the extension limit of the shock absorber 7. Therefore, in this state, it is difficult to remove the shock absorber 7 because the shock absorber 7 continues to receive the load in the extension direction from the suspension coil spring 6.

Therefore, the upper sheet 1 of the suspension coil spring 6
After the connecting bolts 13 for fixing 0 to the sub-frame 1 are detached from the welding nut 14 of the sub-frame 1, the receiving base 20 of the jig 23 is applied to the lower surface of the lower control arm 3 as shown in FIG. The position of the cradle 20 is determined by sandwiching a predetermined portion of the lower control arm 3 from front and rear by the pair of positioning pins 25, 25. Then, the through holes 21 of the receiving base 20 are arranged coaxially with the welding nut 14. Next, the long-axis bolt 22 is inserted into the through hole 21 from below the receiving stand 20, and further, the retainer 12,
Lower seat 11, suspension coil spring 6, and upper seat 10
The lower control arm 3 is pushed up through the washer 24 with the head 22a of the long shaft bolt 22 by screwing the male screw portion 22b into the welding nut 14, thereby forming the suspension coil spring. 6 is given an appropriate compression deformation. If the extension of the suspension coil spring 6 is suppressed by the jig 23 in this manner, the shock absorber 7 is released from the load of the suspension coil spring 6, so that the connection bolts 17, 17 of the mounting flange 15 at the upper end of the shock absorber 7 are released. From the flange nut 18,
The pivot bolt 19 connecting the mounting eye 16 at the lower end of the shock absorber 7 and the lower control arm 3 can be easily removed. In this case, the shock absorber 7 may be removed from the lower end side.

Installation of the removed shock absorber 7 after repair or replacement with a new shock absorber 7 may be performed in a manner opposite to that described above.
That is, in a state in which the extension of the suspension coil spring 6 is suppressed by the jig 23, the mounting eye 16 of the shock absorber 7 is connected to the lower control arm 3 via the pivot bolt 19, and the upper connection bolts 17, The shock absorber 7 is extended until it penetrates the frame 1, and the flange nuts 18, 18 are screwed to the connection bolts 17, 17. Also in this case, the shock absorber 7 may be attached from the lower end side.

Thereafter, the jig 23 is removed, and the upper bolt 10 of the suspension coil spring 6 is fixed to the sub-frame 1 by screwing the connecting bolt 13 to the welding nut 14, and the mounting operation of the shock absorber 7 is completed. I do.

As described above, the mounting and dismounting of the shock absorber 7 can be easily performed without being affected by the load of the suspension coil spring 6, and the operation is performed by one worker by using the jig 23. It is possible.

The long shaft bolt 22 is engaged with the existing welding nut 14 welded to the subframe 1 for mounting the upper sheet 10 of the suspension coil spring 6.
Therefore, the structure of the jig 23 is simple. In addition, since the jig 23 compresses the suspension coil spring 6 without contacting the suspension coil spring 6, the suspension coil spring 6 can be prevented from being damaged.

The present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the gist of the present invention. For example, the present invention can also be applied to the attachment / detachment of a shock absorber on the front wheel side.

[0024]

As described above, according to the present invention, the upper seat is locked to the upper end of the suspension coil spring which swings freely on the vehicle body and supports the wheels and resiliently lowers the control arm. A vehicle in which the upper and lower ends of a shock absorber for damping the vibration of the suspension coil spring are connected to the vehicle body and the control arm, while a connection bolt inserted from below into the upper seat is screwed to a nut fixed to the vehicle body. In attaching and detaching the shock absorber, the connecting bolt is disengaged from the nut while the vehicle body is lifted, and then a cradle is applied to a lower surface of the control arm, and a long shaft having a head in contact with the lower surface of the cradle. Since the suspension coil spring is compressed and deformed by tightening a bolt in the nut, the extension of the suspension coil spring is suppressed. The shock absorber and released from the load of the suspension coil spring, influence of the load of the suspension coil spring desorption of the shock absorber can be easily performed without being Nanito a. Also, since the long shaft bolt is engaged with the existing nut of the vehicle body, the structure of the jig is simple. In addition, the jig compresses the suspension coil spring without contacting it. Damage to the coil spring can also be avoided.

[Brief description of the drawings]

FIG. 1 is a rear view of a rear wheel suspension device of an automobile.

FIG. 2 is a view corresponding to FIG. 1, showing a state of the rear wheel suspension device when the vehicle body is jacked up.

FIG. 3 is a view corresponding to FIG. 1 showing a state in which the extension of a suspension coil spring of the rear wheel suspension device is suppressed using a jig.

FIG. 4 is a perspective view of the jig.

[Explanation of symbols]

1 ···· Body (sub-frame) 3 ···· Control arm (lower control arm) 5 ···· Wheels (rear wheel) 6 ··· Shock absorber 10 Upper seat 13 Connection bolt 14 Nut (welding nut) 20 Cradle 22 Long bolt 22a Head 22b ..Male thread part 23 .... Jig

 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 3C030 BA01 CC02 3D001 AA18 BA22 CA01 DA04 3D114 AA04 AA18 BA27 CA09 DA17 EA11

Claims (1)

[Claims] An upper seat (1) is provided at an upper end of a suspension coil spring (6) which swings freely on a vehicle body (1) and resiliently lowers a control arm (3) supporting a wheel (5).
0), and a connection bolt (13) inserted from below into the upper seat (10) is screwed to a nut (14) fixed to the vehicle body (1), while the suspension coil spring (6) is screwed. In a vehicle in which the upper and lower ends of a shock absorber (7) for attenuating the vibration of (1) are connected to the vehicle body (1) and the control arm (3), the vehicle body (1) is lifted when the shock absorber (7) is detached. Then, the connecting bolt (13) is disengaged from the nut (14), and then a support (20) is applied to the lower surface of the control arm (3), and the head (22a) is mounted on the lower surface of the support (20). By tightening the contacted long shaft bolt (22) into the nut (14), compression of the suspension coil spring (6) is imparted to suppress the extension of the suspension coil spring (6). The butterfly, shock absorber desorption method of a motor vehicle.