JPH09229119A - Coiled wave spring with countermeasure to suppress swelling of terminal in rotating condition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the swelling of a coil seating part even though a strong centrifugal force is operated, by providing a structure to prevent the projection of a terminal to the outer side, when a coil is rotated by making a central shaft as the center. SOLUTION: The terminal 2 of a neighboring coil seating part 3 is fixed by a welding or a soldering to the ridge 10 of a spring, so as to prevent the projection of a terminal 2 to the outer periphery of a coil, even though a centrifugal force 9 operated. And a hole is opened to the terminal 2 of the coil seating part 3, while a projection to engage to the hole is provided at the front end of the ridge 10 of the neighboring spring, and the terminal 2 is contacted with the ridge 10 and pressed to engage the projection to the hole, so as to prevent the projection of the terminal 2 to the outer periphery from the ridge 10 by the centrifugal force. Furthermore, the projection of the terminal 2 to the outer periphery is prevented by cutting off the outer corner part of the terminal 2, or by bending the terminal 2 to the inner side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coiled wave spring, and more particularly to a coiled wave spring suitable for use in a place rotating around a central axis of a coil.

[0002]

2. Description of the Related Art A coiled wave spring 1 is usually
As shown in FIG. 6, a corrugated ribbon is wound around a coil so that the peaks 10 and the valleys 11 contact each other.
Do not undulate the beginning and end of the winding and wind it on a flat coil,
It is an end turn 3 and ends at the terminal 2.

Since this coiled wave spring 1 requires a small mounting space and can obtain a large supporting force in a short stroke, it is suitable for use as a component of a transmission of an automobile, for example. However, when it is used in a place where a rotary motion is fast like a transmission, the end turn portion 3 is generated by the centrifugal force acting on the coil.
In some cases, the terminal portion 2 of the swelled to the outer periphery, contacted with other members on the outer peripheral portion of the spring 1, and the member was damaged by the abrasion.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a coiled wave spring in which the end turn portion does not swell even when a strong centrifugal force is applied.

[0005]

The structure of the present invention for solving the above problems is a coiled wave spring as set forth in the appended claims. That is, it is a coiled wave spring having a structure that prevents the terminal portion from bulging to the outside when rotated around the central axis of the coil.

As means for preventing the terminal portion from bulging to the outside, (1) the terminal portion is joined or engaged with an adjacent plate. (2) Either to remove the outer corner of the terminal portion or to bend the terminal portion inside the coil. (3) In addition, the terminal portion may be wound in parallel with more than double.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a means for joining an end portion to an adjacent plate is a mountain 10 of a spring 1.
The end portion 2 of the end turn portion 3 adjacent to is welded to fix the end portion to the mountain 10. Brazing (4) may be used instead of welding. By doing so, even if a centrifugal force acts, the terminal portion 2 does not project to the outer circumference of the coil.

In FIG. 2, a hole 5 is formed in the end portion 2 of the flat end turn 3, and a protrusion 6 capable of engaging with the hole 5 is provided at the tip of the mountain 10 of the body of the spring 1 adjacent thereto. is there. Since the terminal portion 2 comes into contact with the corrugated crest 10 and is pressed, the projection 6 engages with the hole 5, and the terminal portion 2 does not project from the crest 10 to the outer periphery by centrifugal force.

In FIG. 3, by removing the outer corner portion of the terminal portion 2, that is, the portion 7 shown by the dotted line, even if the terminal portion 2 is slightly deformed to the outer periphery, the portion protruding to the outer periphery is not removed. This is an example of not doing so. Further, since the end portion is lighter by the mass of the deleted portion 7, the centrifugal force acting is also small, and the deformation of the end portion 2 due to it is also small.

FIG. 4 shows an example in which the terminal portion 2 originally located at the position shown by the dotted line is curved inward. By doing so, the outer corner of the terminal portion 2 does not project to the outer periphery.

In FIG. 5, the end turn portion 3 is a parallel turn portion 9. In this example it is double wound,
This may be wound more than double. By stacking them side by side in this manner, the deformation due to bending is mutually restrained, and the terminal portion 2 is prevented from protruding to the outer periphery. Further, when the end turn 3 has a corrugated shape, the frictional force at the contact portion increases, so that the effect is further enhanced.

[0012]

As described above, in the coiled wave spring of the present invention, since the terminal 2 does not project to the outer periphery, even if it is used in a place where a large centrifugal force acts, the outer peripheral member is damaged. There is nothing to do.

[Brief description of drawings]

FIG. 1 is an explanatory view of a portion where a terminal portion of a coiled wave spring is welded or brazed.

FIG. 2 is an explanatory view of a portion where the terminal portions are engaged with each other.

FIG. 3 is an explanatory diagram of a portion from which the outer corner of the terminal portion is deleted.

FIG. 4 is likewise an explanatory view of a portion in which the terminal portion is curved inward.

FIG. 5 is an explanatory view of a portion in which terminal portions are wound in parallel.

FIG. 6 is an explanatory diagram of an example of a coiled wave spring.

[Explanation of symbols]

 1 Coiled Wave Spring 2 Terminal Part 3 End Wound 4 Welding or Brazing Part 5 Hole 6 Protrusion 7 Cutting Part 8 Curved Part 9 Parallel Winding Part 10 Mountain 11 Valley

Claims (4)

[Claims] 1. A coiled wave spring having a structure in which a terminal portion does not project to the outside when rotated about a central axis of a coil. 2. The coiled wave spring according to claim 1, wherein the end portions are joined or engaged with adjacent plates. 3. The coiled wave spring according to claim 1, wherein the outer corner of the terminal portion is deleted or is curved inward. 4. The coiled wave spring according to claim 1, wherein the terminal portions are wound in parallel with each other at least double.