JPS6128697Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a jig for a coil spring compressor that ensures safety when removing and assembling a front coil spring of a front suspension.

It is well known that a front coil spring compressor (hereinafter referred to as SST) is used to remove and assemble a front coil spring of a front suspension of the automatic bone type. This SST consists of a cylindrical nut, a coil spring compression shaft (bolt) placed opposite to the cylindrical nut and whose tip is screwed into the cylindrical nut, and one coil of the coil spring. A U-shaped bolt is provided, and an overhang receiver that fixes the U-shaped bolt at one end and engages the coil spring compression shaft at the other end, pushing the coil spring upward as the bolt moves when the bolt is tightened. (hereinafter referred to as a bracket) and a spacer interposed between the coil spring and the bracket. When removing the coil spring from the front suspension using the SST configured as described above, each member is attached to a predetermined position on the front suspension, and the SST is activated to gradually compress the coil spring. Once the coil spring is separated from the lower arm, remove the lower arm from the steering knuckle arm, then operate SST in the opposite manner to the above to extend the coil spring, release the spring force, and then remove the coil spring from the front suspension. After the work is completed, the SST will be dismantled. To assemble the coil spring, perform the operation in reverse order as described above.

In the above-mentioned coil spring removal and assembly work, there has conventionally been a problem that vibrations from the compression work cause the spacer to fly out, causing serious injury to the worker. That is, when the coil spring is gradually compressed using SST, the repulsive force of the coil spring becomes stronger, and the spacer sandwiched between the coil spring and the bracket tries to come out. If compression work is continued in this state, the spacer is simply held between the bracket and the coil spring, so the vibrations from the compression work will easily cause the spacer to come off and fly out.

The present invention is intended to solve the above-mentioned problems in the conventional SST.It provides a means for engaging both ridges of the bracket and spacer to prevent the spacer from flying out from the bracket, thereby improving the safety of coil spring compression work. The objective is to provide an SST jig with guaranteed performance.

That is, the SST jig of the present invention is characterized in that one of the bracket and the spacer is provided with a convex portion, and the other is provided with an engaging portion that engages with the convex portion.

Hereinafter, the invented jig will be explained based on the drawings while comparing it with a conventional jig. Although the following description will specifically refer to the work of removing the coil spring, it goes without saying that the work of assembling the coil spring can be performed in the same manner.

FIG. 1 is a schematic cross-sectional view showing a state in which a coil spring is removed using SST.

In FIG. 1, reference numeral 1 denotes a steering knuckle arm, which is a joint at the end of the front axle that can be turned left and right by a handle. An upper arm 2 and a lower arm 3 are connected to both ends of the steering knuckle arm 1 via an upper ball joint 4 and a lower ball joint 5, respectively.

The coil spring 6 is a coiled spring, and is provided between the inner surface of the suspension member frame and the inner surface of the lower arm 3 in a compressed state with an appropriate spring force.

The cylindrical nut 7 has its upper end fixed to the suspension member side and is set along the central axis of the coil spring 6, and serves as a screw receiver for the bolt shaft (coil spring compressor shaft) 8. be.

The bolt shaft 8 has a threaded end screwed into the cylindrical nut 7, has a tightening head 8a, and is attached along the central axis of the coil spring 6.

On the other hand, one coil at the lower part of the coil spring 6 is provided with a U-shaped bolt 9 in an interlocking state, with both legs of the U-shaped bolt facing outward from the coil. Both legs 9a, 9 of U-shaped bolt 9
A screw is cut in each part b, and the spacer 11
After assembling the bracket 10 to the U-shaped bolt 9,
Legs 9a and 9b projecting outward from the bracket 10
are fastened with nuts 13a and 13b via washer 12.

The bracket 10 has a cross section of approximately L and is attached with the U-shaped bolt 9 fixed to one end (base) 101 and the other end (projection) 103 engaged with the bolt shaft 8.
It is a letter-shaped member. A bolt head 8a is in contact with the lower surface of the overhang 103, and when the bolt head 8a is rotated to move the bolt shaft 8 upward, the bracket 10 also moves upward accordingly, and the coil Compress the spring 6.

The spacer 11 is a metal member located between the bracket 10 and one coil to which the U-shaped bolt 9 of the coil spring 6 is attached, and is sandwiched between the two members in order to provide a space between them. 14 indicates a suspension member frame.

Conventionally, the bracket 10 and spacer 11 have the shapes shown in FIGS. 2A and 2B, for example. That is, the bracket 10 has a substantially L-shaped cross section, and in order to fit the legs 9a and 9b of the bolt 9, a notch 102 is provided in the base 101 extending downward from the upper end at approximately the center in the width direction. an overhanging portion 10 that extends forward from the base portion 101;
3 is provided with a cutout groove 104 cut out by an appropriate length in the center in the width direction, and is divided into two.

Further, the spacer 11 is a generally U-shaped plate member having a notched groove 111 in the center, and its width is equal to the width of the base 101 of the bracket 10, and the height of the spacer 11 is equal to the height of the base 101 of the bracket 10. make it equal to

To attach the spacer 11 to the bracket 10, the spacer 11, which is a substantially U-shaped plate member, is placed with its closing portion 116 facing upward and the legs 112 and 113 of the spacer 11 on the upper surface of the overhang portion 103. is provided on the front surface of the bracket 10.

Bracket 10 and spacer 11 of the above conventional structure
When the coil spring was compressed by assembling it, the following disadvantages occurred. That is, when the bolt shaft 8 is rotated to compress the coil spring 6, the repulsive force of the coil spring 6 is applied to the projecting portion 103 of the bracket 10, making it easy for the spacer 11 to come off upward. If some force is applied during compression work in this state, the spacer 11 will come off and fly upwards, which is extremely dangerous.

Bracket 10 and spacer 11 with the structure of the present invention
For example, the structure shown in FIG. 3A and B is used. That is, pins 105a and 105b that protrude forward are provided at both ends of the upper front surfaces of the base pieces 101a and 101b defined by the notch 102 of the bracket 10, while the spacer 1
1 has recesses 114a and 114a at the positions corresponding to the pins 105a and 105b when attached to the bracket 10, that is, at both shoulders of the spacer 11.
14b is provided.

The state in which these two members are assembled is shown in FIGS. 4A and 4B. Figure 4 A shows the bracket 10 and spacer 11.
1 is a side view showing the assembled state, and the same is a front view. As shown in the figure, the recess 1 of the spacer 11
Since the pins 105a and 105b of the bracket 10 are engaged with the pins 14a and 114b, respectively, upward movement of the spacer 11 is restricted. Further, in this state, the lateral movement of the spacer 11 with respect to the bracket 10 is also restricted. A U-shaped bolt (not shown) is inserted into the elongated hole A, which has a large diameter in the vertical direction, formed by the notch 102 of the bracket 10 and the notch 111 of the spacer 11, with both legs facing up and down in the figure. be done. In addition, the cutout groove 10 of the bifurcated protruding portion 103 of the bracket 10
A bolt shaft (not shown) is inserted through 4.

To remove the coil spring using the SST equipped with the bracket 10 and spacer 11 configured as described above,
As shown in FIG. 1, U-shaped bolts 9 are intersected with one coil at the bottom of the coil spring 6, and
As shown in the figure, the bracket 10 with the spacer 11 attached to the front surface of the base 101 is attached to the U-shaped bolt. Both legs 9a and 9b of the U-shaped bolt 9 are
The bracket 10 is inserted through the elongated hole A formed by the base 101 of the bracket 10 and the spacer 11.
It protrudes from the back and is tightened with a nut.

The bracket 10 is constructed by inserting the bolt shaft 8 into a notched groove 104 provided in the overhanging portion 103 of the bracket 10.
By bringing the head 8a of the bolt shaft 8 into contact with the lower surface of the bolt 3, the bolt shaft 8 is engaged with the bolt shaft 8.

When the bolt head 8a is rotated clockwise using a rotary tool such as a box wrench, a ratchet wrench, or an air impact wrench, that is, in a direction that compresses the spring, the bolt shaft 8 gradually screws into the cylindrical nut 7 and rotates upward. Move to. The bracket 10 receiving this movement at the projecting portion 103 is pressed upward, and this pressing force is applied to the base 10 of the bracket 10.
It is transmitted to the coil spring 6 via the U-shaped bolt 9 fixed to the coil spring 6, and the coil spring 6 is lifted upward. Continue rotating the bolt shaft 8 clockwise to compress the coil spring 6. When the lower end of the coil spring 6 separates from the lower arm 3, stop the compression operation and separate the lower bolt joint 5 and steering knuckle arm 1. Separate. Next, the bolt head 8a is rotated to the left, that is, in the direction in which the coil spring 6 is expanded.
When coil spring 6 is fully extended, SST
Disassemble and remove coil spring 6 from the front suspension.

In the present invention, the above-mentioned bracket 10 and spacer 11 are provided with an engaging means, so that even if a force is applied in a direction that causes spacer 11 to fly out to the outside due to vibrations during compression work, upward movement of spacer 11 is prevented. Therefore, the spacer 11 will not fall out.

Incidentally, in order to assemble the coil spring 6 to the front suspension, the procedure is completely reversed to that described above.

The present invention is intended to prevent the spacer from popping out from the bracket as the coil spring is compressed during the stage of compressing the coil spring using SST. Therefore, the structure of the bracket and spacer is not limited to that shown in FIG.
1 has protruding pins 115a and 115b, and corresponding base pieces 101a and 101 of the bracket 10.
Both members may be locked by drilling holes 106a and 106b in b and fitting the pin into the holes. Further, instead of providing the notch 102 in the base 101 of the bracket 10, the upper end of the base 101 is closed and a long hole is bored, a pin is protruded from the upper center of the front surface of the base 101, and the spacer 11 is provided with a pin. Alternatively, a recess may be provided at the center of the upper end of the closing portion 116, and the spacer may be locked to the bracket by bringing the pin into contact with the recess.

In the jig of the present invention, engagement means are provided at mutually corresponding positions of the bracket and spacer to restrict the movement of the spacer, thereby preventing the spacer from popping out when compressing the front coil spring using these jigs. It can be completely prevented. In addition, since the spacer is limited in vertical and horizontal movement relative to the bracket, these jigs are
It is also easy to position both parts by attaching them to the bolts, which also has the effect of simplifying the SST assembly work.

[Brief explanation of the drawing]

Figure 1 is a schematic cross-sectional view showing the state when a coil spring is compressed using SST, Figure 2 A and B are perspective views showing the conventional structure of the bracket and spacer.
3A and 3B are perspective views showing the bracket and spacer of the structure of the present invention, FIG. 4A is a side view showing the assembled state of the bracket and spacer of FIG. 3, FIG. Figures A and B are perspective views showing other examples of the spacer and bracket of the present invention. In the diagram, 1... Steering knuckle arm, 6
......Coil spring, 7...Cylindrical nut,
8... Bolt shaft, 9... U-shaped bolt, 10... Bracket, 101... Base, 103... Overhanging part,
105a, 105b...pin, 106a, 106
b...hole, 11...spacer, 114a, 114
b... recess, 115a, 115b... pin.

Claims (1)

[Claims for Utility Model Registration] A cylindrical nut disposed at the shaft position of a coil spring to be attached and detached, and a coil spring compressor shaft screwed to the cylindrical nut, which is engaged with the compressor shaft. , a jig for pressing the coil spring in the direction of compression by screwing the compressor shaft into the cylindrical nut, and a U for mounting in a manner that interlocks with the coil spring.
a bracket that has an L-shaped portion that engages the compressor shaft at its center and that the U-shaped bolt engages at one end and whose other end abuts a coil spring; and an L-shaped portion between the coil spring and the bracket. A jig for a coil spring compressor comprising a spacer interposed between the bracket and the spacer, wherein one of the brackets is provided with a convex portion, and the other is provided with an engaging portion that engages with the convex portion. A jig for a coil spring compressor, which is characterized by: