JPS6234664Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coil spring compression jig for assembling a suspension for suspending an automobile body.

In the strut-type suspension of an automobile, a dust boot is fitted onto the piston rod of the shock absorber, and the piston rod is pulled outward while pressing the upper end of the dust boot, while compressing the free coil spring to release the tip of the piston rod. It is customary to make the piston rod protrude, fit a spring seat, a mounting block, etc. to the tip of the piston rod, and fix it with a nut.

At this time, the method used to compress the coil spring is to insert a pair of claws into the middle of the coil spring to compress it, but the helical pitch of the coil spring differs depending on the type of car it is equipped with. Therefore, unless special means corresponding to the type of coil spring is used, the coil spring will tilt when compressed, making it impossible to carry out post-fitting work such as the spring seat and mounting block. Therefore, in the past, dedicated compression means have been employed depending on the type of coil spring.

However, in recent years, automobile assembly lines that accommodate multiple car models (hereinafter referred to as mixed flow lines) have been adopted, and in order to accommodate this mixed flow line, several types of coil springs are compressed using the same device. There has been an increasing need for a versatile coil spring compression jig that can be used to compress springs.

In view of the above-mentioned points, the present invention is designed to provide an engaging claw to be engaged with a coil spring by eccentrically projecting the claw on the end face of the insertion pin part, and to change the insertion angle of the engaging claw. Therefore, the purpose is to provide a versatile coil spring compression jig that can change the height between both claw parts and can easily accommodate several types of coil springs, and has achieved this objective. Therefore, a movable table is provided above the support jig for the column that constitutes the suspension assembly device so as to be movable up and down by a driving means along the column, and a pair of opening/closing units are pivotally supported on the movable table so as to be horizontally rotatable. arm and
Each of the opening/closing arms is provided with a pair of engaging claws facing inward and at different heights, and at least one of these engaging claws rotates around a horizontal hole formed in the opening/closing arm. It is composed of a pin part that is stopped and inserted, and a claw part that projects on the inner end surface of the pin part at a position eccentric to the axis of the pin part, and the attachment angle of the engaging claw with respect to the horizontal hole is fixed. The present invention is characterized by a configuration in which the interval in the height direction between the claw portions of both engaging claws can be adjusted by changing.

Hereinafter, a coil spring compression jig for suspension assembly according to an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a suspension assembly apparatus A equipped with a coil spring compression jig according to this embodiment.

This assembly device A includes a pedestal 1, a clamping means 2,
The main components include a coil spring compression jig 3 and a traction means 4.

The pedestal 1 is provided so as to protrude from the front at the lower end of a column 6 erected on the base 5, and on its upper surface is a holder jig on which a shock absorber 9, which will be described later, is to be placed in a vertical position. 7 is provided.

The clamping means 2 functions to prevent the shock absorber 9 from swinging.

The coil spring compression jig 3 is for compressing a coil spring 13 attached to the shock absorber 9, as will be described in detail later.

The traction means 4 moves the piston rod 11 of the shock absorber 9 by the operation of the traction cylinder 8.
It acts to extract.

This assembly device A is for assembling the suspension shown in FIG.
is extracted by the traction means 4, and the coil spring 13 placed on the spring seat 12 on the side of the shock absorber 9 is compressed by the coil spring compression jig 3 until the upper end of the piston rod 11 protrudes. 11 Rubber sheet 14 at the upper end, upper spring seat 1
5.Mounting block 16 and washer 17
are fitted and fixed with nuts 18.

Next, the coil spring compression jig in the above assembly apparatus will be described in further detail with reference to FIGS. 3 to 7.

This coil spring compression jig (hereinafter simply referred to as a compression jig) 3 has a movable base 19 provided above the support jig 7 of the strut 6 so as to be movable up and down along the strut 6, and a A pair of opening/closing arms 2 which are horizontally rotatably supported by pins 20, 20.
1, 21, and a pair of engaging claws 22, 22 provided at the opening/closing ends 21a, 21a of each opening/closing arm 21, 21 facing inward and at different heights. .

The movable base 19 can be slid in the vertical direction by engagement between guide rails 23, 23 and guide claws 24, 24 arranged in parallel on the front surface of the support column 6, and has a drive means at its upper end. The tip of a piston rod 26 of an elevating cylinder 25 operated by a certain air pressure or the like is connected to the elevating cylinder 25.

The opening/closing arms 21, 21 have opening/closing ends 2 thereof.
1a and 21a are configured to hold the outer periphery of the coil spring 13, and the base end 21
Links 27, 27 are pivotally attached to b, 21b, respectively, and both links 27, 27 are connected to the piston rod 2 of an opening/closing cylinder 28 operated by air pressure or the like.
It is pivotally supported by a common pin 31 to an interlocking member 30 connected to 9. That is, this opening/closing arm 2
1 and 21 are opening and closing ends 21a and 21a, which are opened and closed as the piston rod 29 of the opening and closing cylinder 28 expands and contracts.
is designed to open and close.

Also, the opening and closing ends 21a, 21 of each arm 21, 21
In a, horizontal holes 32, 32 for attaching the engaging claws 22, 22 are bored at slightly different heights (see FIG. 4). Reference numeral 33 is a spare horizontal hole.

The horizontal hole 32 has a round hole portion 32a as shown in FIG.
and a square hole portion 32b continuous to the inner end side of the round hole portion 32a.
Alternatively, as shown in FIG. 7, the whole may be constructed from a square hole.

The engaging pawl 22 has a pin portion 34 to be fitted into the horizontal hole 32 and a pawl portion 3 that protrudes at a position eccentric from the pin portion axis on the inner end surface of the pin portion 34.
It is composed of 5 and 5. The pin portion 34
As shown in FIG. 6, the round hole portion 32 of the horizontal hole 32
The circular shaft portion 34a to be inserted into the horizontal hole 3
Square shaft portion 34b to be fitted into square hole portion 32b of No. 2
They may be integrally molded, or the entire shaft may be constructed of a square shaft as shown in FIG. Thus, the engagement pawl 22 is fitted into the square shaft portion 34b of the pin portion 34 and the square hole portion 32b of the horizontal hole 32 so as to be prevented from rotating. Note that the square hole portion 32b in FIG. 6 can be replaced with a vertical groove as shown by the two-dot chain line.

Further, on the outer circumferential surface of the pin portion 34 of the engaging claw 22 (in the case of FIG. 6, the outer circumferential surface of the circular shaft portion 34a of the pin portion), a circular groove 36 for fitting the retaining pin is formed. On the other hand, the opening/closing arm 21 is formed with a pin hole 37 that vertically penetrates along the inner circumferential surface of the horizontal hole 32 (in the case of FIG. 6, the horizontal circular hole portion 32a).

Thus, the engagement claw 22 is prevented from coming off by the engagement between the retaining pin 38 fitted into the pin hole 37 and the annular groove 36 on the pin portion 34 side. A longitudinal recess 39 is formed on the side surface of the pin 38. After lifting the pin 38 slightly as shown in FIG. When the pin 38 is turned to , the action of the pin 38 to prevent the engagement claw 22 from coming off is released.

In this embodiment, the square shaft portion 34 of the pin portion 34
b and the square hole portion 32b of the horizontal hole 32 are both square in cross section, but it goes without saying that they may be pentagonal or hexagonal. Also, as a means for preventing rotation of the engaging claw 22, the square shaft portion 34b is used.
It is also free to adopt any suitable means other than fitting the square hole 32b with the square hole 32b.

Next, to explain the action of the illustrated compression jig, the fourth
As shown in the figure, a coil spring 13 is placed on the spring seat 12 of the shock absorber 9.
While being held by the opening/closing arms 21, 21, the claws 35, 35 of the engaging claws 22, 22 are held in the middle of the free length of the coil spring 13 (for example, the second or third winding downward from the upper end of the spring). The coil spring 13
It compresses the . At this time, the claw portions 35 of each engaging claw 22 are both positioned at the uppermost position, and the height interval between the claw portions 35, 35 is _h1 .

Next, when using a coil spring 13 of a different type than the above (for example, one with a large helical pitch), the retaining pin 38 is rotated upward to release the retaining action and one of the engaging claws is closed. 22
By changing the mounting angle of 180 degrees, the claw part 35,
The height interval between 35 is h ₂ (>h ₁ ). Therefore,
Even if the coil spring 13 has a large helical pitch, the proper contact with the claws 35, 35 is maintained, and the spring can be compressed while maintaining a normal posture.

Note that when changing the mounting angle of the engagement claw 22 by 90 degrees, the height interval between the claw portions 35, 35 becomes an intermediate value between _h1 and _h2 .

Next, the effects of the coil spring compression jig for suspension assembly of the present invention will be described.

According to the present invention, the coil spring compression jig is mounted on a movable base that is provided above the support jig of the strut so as to be movable up and down along the strut by a driving means, and that the coil spring compression jig is pivotably supported on the movable base so as to be horizontally rotatable. a pair of opening/closing arms, and a pair of engaging claws provided on each opening/closing arm facing inward and at different heights, and at least one of these engaging claws is connected to the It consists of a pin part that is fixedly inserted into a horizontal hole formed in the opening/closing arm, and a claw part that protrudes at a position eccentric from the pin part axis on the inner end surface of the pin part, and the engagement By changing the angle at which the claws are attached to the horizontal hole, the distance between the claws in the height direction can be adjusted, so all you have to do is change the angle at which the engaging claws are attached. Now, using the same compression jig, different coil springs with several types of helical pitches can be compressed while always maintaining their normal posture.
When this compression jig is used in suspension assembly equipment, it has the practical effect of being versatile enough to be used in mixed flow lines.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of a suspension assembly device equipped with a coil spring compression jig according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of a strut-type suspension for an automobile, and Fig. 3 is the same as Fig. 1. of-
A cross-sectional view, Figure 4 is a cross-sectional view of Figure 3, and Figure 5 is a cross-sectional view of Figure 3.
The figure is a cross-sectional view taken from FIG. 3, and FIGS. 6 and 7 are perspective views showing two specific examples of combinations of engaging claws and horizontal holes, respectively. 6... Support column, 7... Holding jig, 9... Shock absorber, 11... Piston rod, 12... Spring seat, 13... Coil spring, 1
9...Movable base, 21...Opening/closing arm, 22...Engaging claw, 32...Horizontal hole, 34...Pin part, 35...
Claw part.

Claims (1)

[Scope of utility model registration request] In a suspension assembly device, a shock absorber is placed in a vertical position on a support jig at the bottom of a support column, and a spring seat is attached to an end of the piston rod by compressing a coil spring installed on the outside of a piston rod of the shock absorber. , a movable table provided above the support jig for the column so as to be movable up and down by a driving means along the column; a pair of opening/closing arms pivotally supported on the movable table for horizontal rotation; and each of the opening/closing arms. and a pair of engaging claws provided at different heights and facing inward from each other, and at least one of these engaging claws is fixedly fitted into a horizontal hole formed in the opening/closing arm. It is composed of a pin part to be inserted and a claw part protruding from the inner end surface of the pin part at a position eccentric to the pin part axis, and the attachment angle of the engaging claw with respect to the horizontal hole is changed. A coil spring compression jig for suspension assembly, characterized in that the distance in the height direction between the claw portions of both engaging claws can be adjusted.