JPH0128362Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is used in clutch mechanisms of automatic transmissions of automobiles, etc., and a plurality of compression coil springs are mounted on one surface of an annular substrate between them and a mating member. The present invention relates to a spring assembly that is compressibly mounted in a vertical position, and particularly relates to a spring assembly that has an improved structure for mounting a compression coil spring to a substrate.

Problems to be Solved by Conventional Technologies and Ideas Conventionally, a spring assembly in which a plurality of compression coil springs are mounted in a vertical position on one surface of an annular substrate of this type has been proposed in Japanese Patent Publication No. 56-47419. ,
A plurality of cylindrical protrusions are provided on one surface of the substrate by burring at intervals in the circumferential direction, and a reduced diameter end turn portion formed at one end of a compression coil spring is fitted into the protrusions. It is known that a compression coil spring is attached irremovably and freely compressible by caulking and expanding the upper end of the protrusion and pressing down on the end turn. When the solid body is swaged, the inner peripheral surface of the spring wire that makes up the end turn is pressed and damaged, and especially when the spring bends under load, the inner peripheral surface of the wire is damaged. Due to the high stress generated, there was a drawback that breakage accidents were likely to occur at the end turn portion.

The present invention was developed in view of the above points, and there is no risk of damaging the spring wire when attaching a compression coil spring to a board, and the attachment can be done easily and reliably. It is an object of the present invention to provide a spring assembly according to the present invention.

Embodiment Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 4.

The compression coil spring 1 applied to this embodiment has a coil portion 3 in which a spring wire 2 is spirally wound, and a seat surface 4 and an end turn portion 5 that are perpendicular to the center line are formed at both ends of the coil portion 3. The spring wire 2 is extended in the direction of the center line of the coil part 3, and the tip thereof is bent in the direction of the center of the coil part 3 by a length approximately equal to the coil diameter to form a hook part 6. On the other hand, the substrate 8 to which the compression coil spring 1 is attached has a ring shape of a constant width with rising portions on the outer and inner peripheries, and the bottom plate 9 has an elongated mounting hole through which the hook portion 6 of the compression coil spring 1 is inserted. A plurality of springs 10 are transparently provided in a radial manner facing toward the center of the substrate 8 at regular intervals in the circumferential direction, and on the bottom plate 9 of the substrate 8, the compression coil spring 1 has its hook portion 6. A locking plate 11 that is inserted into the mounting hole 10 and placed in a vertical position and that locks onto the hook portion 6 is inserted into the gap between the lower surface of the bottom plate 9 and the hook portion 6 that protrudes toward the lower surface side of the bottom plate 9. It's starting to become easier.

This locking plate 11 has a notch 12 at one end in the length direction into which the vertical base 6a of the hook part 6 is fitted, and two positioning bulges on the top surface which fit into the mounting hole 10. 13, 13, and a contact portion 14 that abuts the hook portion 6 is formed on the lower surface of the valley between the two bulging portions 13, 13, and furthermore, a contact portion 14 that contacts the hook portion 6 in the lateral direction of the hook portion 6 is formed on the lower surface. As shown in FIG.
2, with the end facing forward, push the hook part 6 between the lower surface of the bottom plate 9 and the hook part 6 from the tip side of the hook part 6 while bending and deforming it downward;
When the bulging portions 13, 13 are fitted into the mounting holes 10, the locking plate 11 is immovably fixed to the bottom plate 9, and the abutment portion 14 of the locking plate 11 presses the hook portion 6 downward. The end turn portion 5 is pressed against the upper surface of the bottom plate 9, and the base portion 6a of the hook portion 6 is sandwiched between the inner end of the notch groove 12 and the inner end surface of the mounting hole 10, and Movement is regulated and the hook portion 6 is fitted into the long groove 15 of the locking plate 11.
The compression coil spring 1 is attached to the substrate 8 so that the coil portion 3 can be freely compressed by being fitted into the mounting hole 10 to restrict movement in a direction perpendicular to the mounting hole 10 .

Structure and Effects of the Invention As is clear from the above description, the spring assembly of the present invention has a spring wire constituting the coil part attached to one end of the coil part on one surface of the annular base plate, and a center line of the coil part. A plurality of compression coil springs each having a hook portion formed by stretching in the direction and bending toward the center of the coil portion are arranged in a vertical position and spaced apart from each other in the circumferential direction, and each of the compression coil springs is Each of the compression coils is attached by inserting the hook portion into a mounting hole formed through the substrate and inserting a locking plate that locks the hook portion between the other surface of the substrate and the hook portion. The gist is that the spring is attached to the board in a freely compressible manner, and the hook part of the compression coil spring is inserted into the mounting hole of the board, and a locking plate is inserted between the board and the hook part. This allows each compression coil spring to be easily and securely attached to the board, and there is no risk of damaging the spring wires as would be the case when attaching them by caulking, which would lead to a decrease in the strength of the spring wires. This has the effect of preventing spring breakage from occurring.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is an exploded perspective view showing details of the mounting structure, and FIGS. 3 and 4 are sectional views of the compression coil spring installed. 1... Compression coil spring, 2... Spring wire, 3...
...Coil part, 6...Hook part, 8...Substrate, 9...
...bottom plate, 10...mounting hole, 11...locking plate.

Claims (1)

[Scope of utility model registration request] A plurality of spring wires constituting the coil part are stretched in the direction of the center line of the coil part and bent in the direction of the center of the coil part at one end of the coil part to form a hook part on one surface of the annular substrate. compression coil springs are disposed in a vertical position and spaced apart from each other in the circumferential direction, and the hook portions of the respective compression coil springs are inserted into mounting holes transparently provided in the substrate, and A spring assembly characterized in that each of the compression coil springs is freely compressively attached to the substrate by interposing a locking plate that locks the hook portion between the hook portion and the hook portion.