JP7005954B2 - Coiled wave spring - Google Patents

Description

The present invention relates to a coiled wave spring in which a flat wire rod is spirally formed while meandering with an amplitude of height along the axial direction.

Conventionally, coiled wave springs (some are simply referred to as "wave springs") in which a flat wire rod is spirally formed while meandering with an amplitude of height along the axial direction are known (for example, Patent Documents). See 1.).

A coiled wave spring is, for example, in a clutch unit of an automatic transmission, with a displacement along the axial direction of the piston between the piston that presses the friction engagement element and the spring retainer locked to the fixed side member. It is arranged as a return spring that expands and contracts (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2015-043728 JP-A-2010-201041

However, in such a coiled wave spring disclosed in the prior art document, when it expands and contracts, the contact portion may shift in the circumferential direction, and the wire rod may not contact at the apex (twist). Further, if the wire expands or contracts in a direction deviated from the axial direction, each step may deviate in the radial direction and the wire rod may not contact at the apex (falling down). Further, when such a deviation in the circumferential direction or a deviation in the radial direction occurs, there is a possibility that the order of the wires located above and below is changed or entangled (kinking). Therefore, when such a deviation occurs in the coiled wave spring, there is a possibility that the desired spring function cannot be fully exerted.

An object of the present disclosure technique is to provide a coiled wave spring capable of suppressing displacement of a wire rod and thus sufficiently exerting a desired spring function in order to solve the above-mentioned problems. ..

In order to achieve the above object, the technique of the present disclosure is a coil in which a plurality of valleys and a plurality of peaks are alternately provided in a plurality of winding portions made of a spirally wound wire with an amplitude along the axial direction. In the dwave spring, the plurality of valleys and the plurality of peaks are such that each valley in the previous stage and each mountain in the next stage face each other so as to be in contact with each other, and the valleys and the peaks in the facing portions are opposed to each other. The mountain portion is provided with an engaging portion that projects toward one side in the axial direction and can engage with each other.

Further, the wire rod has a rectangular cross-sectional shape that is long in the radial direction due to the metal material, and the engaging portion is one of the valley side or the valley side from one of the valley portion of the previous stage or the mountain portion of the next stage facing each other. An engaged protrusion having an engaging concave surface on the other surface of the mountain side or the valley side, and an engaged protrusion from the other of the valley portion of the previous stage or the mountain portion of the next stage facing each other. It is preferable to have an engaging projection portion having an engaging concave surface portion and an engaging convex surface portion that can be engaged with the engaging concave surface portion while projecting in the same direction.

Further, it is preferable that the engaged protrusion and the engaging protrusion straddle the entire width of the wire so as to have a ridge line along the radial direction.

Further, it is preferable that the engaged protrusion and the engaging protrusion have a chevron shape.

According to the technique of the present disclosure, it is possible to suppress the displacement of the wire rod, and thus to fully exert the desired spring function.

A coiled wave spring according to the first embodiment is shown, (A) is a side view of the coiled wave spring, and (B) is a plan view of the coiled wave spring. It is explanatory drawing of the state in which the coiled wave spring which concerns on 1st Embodiment is expanded in a plane. The coiled wave spring according to the first embodiment is shown, (A) is an enlarged perspective view of a main part, (B) is an enlarged cross-sectional view of a main part in a state where the engaging part is separated, and (C) is an engaging part. It is an enlarged cross-sectional view of a main part in a state of being in contact (engaged state). A coiled wave spring according to a second embodiment is shown, (A) is a side view of the coiled wave spring, and (B) is a plan view of the coiled wave spring. A coiled wave spring according to a second embodiment is shown, (A) is an enlarged perspective view of a main part, (B) is an enlarged cross-sectional view of a main part in a state where the engaging parts are separated, and (C) is an engaged part. It is an enlarged cross-sectional view of a main part in a state of being in contact (engaged state). A coiled wave spring according to another embodiment is shown, (A) is a side view of the coiled wave spring, (B) is an enlarged side view of a main part, and (C) is an explanatory view showing an arrangement relationship of an engaging part. Is.

Hereinafter, the coiled wave spring according to the embodiment of the present invention will be described with reference to the accompanying drawings. The same parts are designated by the same reference numerals, and their names and functions are also the same. Therefore, detailed explanations about them will not be repeated.

[First Embodiment]
FIG. 1 shows a coiled wave spring according to the first actual embodiment. The coiled wave spring 10 of the present embodiment is arranged in, for example, a damper unit, a flywheel unit, a differential unit, a clutch unit, or the like for a vehicle.

In the coiled wave spring 10 shown below, for example, in the clutch unit of the transmission, the coil is arranged between the piston that presses the friction engagement element and the spring retainer locked to the fixed side member, and is used as a return spring. Illustrated as functioning. The coiled wave spring 10 is preferably arranged in a compressed state.

The coiled wave spring 10 has a substantially perfect circular shape in a plan view, and a rectangular shape having a cross-sectional shape orthogonal to the circumferential direction is long in the radial direction, that is, a flat wire rod is used. The coiled wave spring 10 is formed in a spiral shape while gently meandering with an amplitude of a predetermined height along an axial direction orthogonal to the radial direction. For the coiled wave spring 10, it is preferable to use a metal material such as a stainless steel material having a width along the radial direction and a flat cross section as the wire material.

The coiled wave spring 10 includes a plurality of stages of winding portions 11 to 14 except for a portion of less than one winding (one round) including both upper and lower ends 10a and 10b in the drawing.

Here, the "winding portion" means a portion of one winding (one round) of the coiled wave spring 10. In the present embodiment, for convenience of explanation, the number of turns of the coiled wave spring 10 is four (four steps), except for a portion including less than one turn including both upper and lower ends 10a and 10b in the drawing. It is composed of 11 to 14.

The coiled wave spring 10 is subject to conditions such as the number of turns of the winding portions 11 to 14, the amount of meandering displacement (corresponding to the height of the amplitude), the width (diametric direction) and the thickness (axis direction) of the wire rod S, and the inner diameter. It is possible to change as appropriate according to the conditions such as the part where the is used and the spring constant.

Further, as shown in FIG. 1, the coiled wave spring 10 is not always arranged (mounted) so that the extending direction of the axis Q is the vertical direction (or the vertical direction), but is not always arranged (mounted) in the horizontal direction. (Or in the vertical direction), or in the inclined direction.

Further, in the explanation of the relationship between the constituent elements in the vertically adjacent states shown in FIGS. 1 (A) in each of the winding portions 11 to 14, unless the specific winding portions 11 to 14 are described. , The upper side in the figure is referred to as "previous stage", and the lower side in the figure is referred to as "next stage". Therefore, in the following description, when the specific winding portions 11 to 14 are described, the first winding portion 11, the second winding portion 12, and the third winding portion 13 are described from the upper side shown in FIG. 1 (A). It is referred to as Volume 4, Part 14.

Further, the portion less than one roll (one lap) including both ends 10a and 10b located at the uppermost and lowermost positions is shown in the illustrated example having a configuration in which it is formed in a meandering state and contributes as a part of the repulsive force. However, there are some that have a flat structure without forming a meandering state. Therefore, although detailed description is omitted in consideration of the case where the flat structure does not have a direct repulsive force, the portion having the same structure as the winding portions 11 to 14 is omitted. With respect to, it is assumed that they have the same composition, action, and effect.

As shown in FIG. 2, the first winding portion 11 is provided with four first valley portions 1Ta to 1Td and four first mountain portions 1Ya to 1Yd alternately. The first valley portion 1Ta to 1Td and the first mountain portion 1Ya to 1Yc are alternately continuous (meandering) at equal intervals in the circumferential direction. The number, height, wavelength λ, etc. of the amplitude associated with this meandering can be appropriately changed depending on the portion where the coiled wave spring 10 is used, the spring constant to be set, and the like (the same applies in the following description). For the wavelength λ, for example, a sine curve, a cosine curve, or the like can be used.

The second volume portion 12 extends continuously from the first volume portion 11 and is located below the first volume portion 11 (next stage). The second volume portion 12 alternately includes four second valley portions 2Ta to 2Td and four second mountain portions 2Ya to 2Yd. The second valley portion 2Ta to 2Td and the second mountain portion 2Ya to 2Yd are alternately continuous at equal intervals in the circumferential direction. It should be noted that the first valley portion 1Td of the peripheral end portion (right end portion in the drawing) of the first winding portion 11 and the second valley portion of the circumferential front stage closer end portion (left end portion in the drawing) of the second winding portion 12. The portion 2Ta is also used with the apex protruding most downward as a boundary.

Here, the second valley portion 2Ta to 2Td corresponds to the first mountain portion 1Ya to 1Yd, and the second mountain portion 2Ya to 2Yd corresponds to the first valley portion 1Ta to 1Td. In addition, "corresponding" means the state shown in FIG. 1 (A), that is, the circumferential direction (the left-right direction of the paper surface in FIG. 1 (A)) and the axial direction (the axial direction) when the coiled wave spring 10 is viewed from the radial direction. (A) in FIG. 1 (A) is used as a reference.

For example, the correspondence between the second valley portion 2Ta to 2Td and the first mountain portion 1Ya to 1Yd means that the valley bottom of the second valley portion 2Ta to 2Td and the peak of the first mountain portion 1Ya to 1Yd correspond to the axis Q. It indicates that it is the farthest position in the direction along the line and the closest position in the circumferential direction.

Specifically, the summit of the second mountain portion 2Ya is the farthest from the valley bottom of the first valley portion 1Ta, which has the farthest distance in the axial direction and the shortest distance in the circumferential direction, and the summit of the second mountain portion 2Yb is in the axial direction. The first valley is the furthest away from the valley bottom of the first valley 1Tb, which is the farthest and the shortest in the circumferential direction, and the summit of the second mountain 2Yc is the farthest in the axial direction and the shortest in the circumferential direction. The peak of the second mountain portion 2Yd is the farthest from the valley bottom of the first valley portion 1Td, which is the farthest in the axial direction and the shortest distance in the circumferential direction.

Similarly, the correspondence between the second mountain portion 2Ya to 2Yd and the first valley portion 1Ta to 1Td means that the peak of the second mountain portion 2Ya to 2Yd and the valley bottom of the first valley portion 1Ta to 1Td are the axes. Indicates that it is the closest position in the directional and circumferential directions. In the present embodiment, the peaks of the second mountain portions 2Ya to 2Yd and the valley bottoms of the first valley portions 1Ta to 1Td are in contact with each other at least when they are arranged in a compressed state between the piston and the spring retainer. It is in a state.

Specifically, the summit of the second mountain portion 2Ya comes into contact with the valley bottom of the first valley portion 1Ta having the shortest distance in the axial direction and the circumferential direction, and the summit of the second mountain portion 2Yb has the shortest distance in the axial direction and the circumferential direction. The peak of the second mountain portion 2Yc is in contact with the valley bottom of the first valley portion 1Tc which is the closest in the axial direction and the circumferential direction, and the peak of the second mountain portion 2Yd is in contact with the axis line. It is in contact with the valley bottom of the first valley portion 1Td having the shortest distance in the direction and the circumferential direction.

The wire rod S has a long width in the radial direction. Therefore, strictly speaking, the "contact" state means that the ridgeline (hereinafter, also referred to as "mountain side ridgeline") along the radial direction of the front stage side surface at the summit of each second mountain portion 2Ya to 2Yd is each. It means that the ridges along the radial direction of the surface on the next stage side at the valley bottom of the first valley portion 1Ta to 1Td (hereinafter, also referred to as “Tanigawa ridgeline”) are in contact with each other in agreement with each other. However, including the error, the mountain-side ridgeline and the valley-side ridgeline do not always come into contact with each other in the circumferential direction. Further, in the following description, for convenience of explanation, the "mountain side ridgeline" is also referred to as a "mountain side apex" or simply a "vertex", and the "valley side ridgeline" is also referred to as a "valley side apex" or simply a "vertex". Further, since the ridges are in contact with each other in a meandering state, depending on the degree of compression, the two may not be in line contact but in surface contact having a length in the circumferential direction due to the elastic deformation of the wire S. ..

The third winding portion 13 extends continuously from the second winding portion 12 and is located below the second winding portion 12. The third volume portion 13 alternately has four third valley portions 3Ta to 3Td and four third mountain portions 3Ya to 3Yd. The third valley portion 3Ta to 3Td and the third mountain portion 3Ya to 3Yd are alternately continuous at equal intervals in the circumferential direction. It should be noted that the second valley portion 2Td of the second winding portion 12 near the circumferential next step (right end portion in the drawing) and the third valley portion of the third winding portion 13 near the circumferential front step (left end portion in the drawing). The portion 3Ta is also used with the apex protruding most downward as a boundary.

Here, the third valley portion 3Ta to 3Td corresponds to the second mountain portion 2Ya to 2Yd, and the third valley portion 3Ya to 3Yd corresponds to the second valley portion 2Ta to 2Td.

For example, the correspondence between the third valley portion 3Ta to 3Td and the second mountain portion 2Ya to 2Yd means that the vertices of the third valley portion 3Ta to 3Td and the vertices of the second mountain portion 2Ya to 2Yd are in the axial direction. Indicates that it is in the farthest position and is in the closest position in the circumferential direction.

Specifically, the apex of the third mountain portion 3Ya is the most distant from the apex of the second valley portion 2Ta having the farthest distance in the axial direction and the shortest distance in the circumferential direction, and the apex of the third mountain portion 3Yb is in the axial direction. The distance is the farthest and the distance in the circumferential direction is the shortest from the apex of the second valley 2Tb, and the apex of the third mountain 3Yc is the farthest in the axial direction and the distance in the circumferential direction is the shortest in the second valley. The apex of the third mountain portion 3Yd is the most distant from the apex of the portion 2Tc, and the apex of the third mountain portion 3Yd is the farthest from the apex of the second valley portion 2Td having the farthest distance in the axial direction and the shortest distance in the circumferential direction.

Similarly, the correspondence between the third mountain portion 3Ya to 3Yd and the second valley portion 2Ta to 2Td means that the apex of the third mountain portion 3Ya to 3Yd and the apex of the second valley portion 2Ta to 2Td are axis lines. It indicates that it is the closest position in the direction and the circumferential direction. In the present embodiment, the vertices of the third peak portion 3Ya to 3Yd and the vertices of the second valley portion 2Ta to 2Td are in contact with each other at least when they are arranged in a compressed state between the piston and the spring retainer. It is in a state.

Specifically, the apex of the third mountain portion 3Ya contacts the apex of the second valley portion 2Ta having the shortest distance in the axial direction and the circumferential direction, and the apex of the third mountain portion 3Yb has the shortest distance in the axial direction and the circumferential direction. It contacts the apex of the second valley 2Tb that is close, the apex of the third mountain 3Yc contacts the apex of the second valley 2Tc that has the shortest distance in the axial and circumferential directions, and the apex of the third mountain 3Yd is the axis. It is in contact with the apex of the second valley 2Td having the shortest distance in the direction and the circumferential direction.

The fourth volume portion 14 extends continuously from the third volume portion 13 and is located below the third volume portion 13. The fourth volume portion 14 alternately has four fourth valley portions 4Ta to 4Td and four fourth mountain portions 4Ya to 4Yd. The fourth valley portion 4Ta to 4Td and the fourth mountain portion 4Ya to 4Yd are alternately continuous at equal intervals in the circumferential direction. It should be noted that the third valley portion 3Td of the peripheral end portion (right end portion in the drawing) of the third winding portion 13 and the fourth valley portion of the circumferential front stage closer end portion (left end portion in the drawing) of the fourth winding portion 14. The portion 4Ta is also used with the apex protruding most downward as a boundary.

Here, the 4th valley portion 4Ta to 4Td corresponds to the 3rd mountain portion 3Ya to 3Yd, and the 4th mountain portion 4Ya to 4Yd corresponds to the 3rd valley portion 3Ta to 3Td.

For example, the correspondence between the 4th valley portion 4Ta to 4Td and the 3rd mountain portion 3Ya to 3Yd means that the apex of the 4th valley portion 4Ta to 4Td and the apex of the 3rd mountain portion 3Ya to 3Yd are in the axial direction. Indicates that it is in the farthest position and is in the closest position in the circumferential direction.

Specifically, the apex of the 4th mountain portion 4Ya is the most distant from the apex of the 3rd valley portion 3Ta having the farthest distance in the axial direction and the shortest distance in the circumferential direction, and the apex of the 4th mountain portion 4Yb is in the axial direction. The third valley is the furthest away from the apex of the third valley 3Tb, which is the farthest and the shortest in the circumferential direction, and the apex of the fourth crest 4Yc is the third valley, which is the farthest in the axial direction and the shortest in the circumferential direction. The apex of the fourth mountain portion 4Yd is the farthest from the apex of the portion 3Tc, and the apex of the fourth mountain portion 4Yd is the farthest from the apex of the third valley portion 3Td having the farthest distance in the axial direction and the shortest distance in the circumferential direction.

Similarly, the correspondence between the 4th mountain portion 4Ya to 4Yd and the 3rd valley portion 3Ta to 3Td means that the apex of the 4th mountain portion 4Ya to 4Yd and the apex of the 3rd valley portion 3Ta to 3Td are axis lines. It indicates that it is the closest position in the direction and the circumferential direction. In the present embodiment, the vertices of the 4th mountain portion 4Ya to 4Yd and the vertices of the 3rd valley portion 3Ta to 3Td are in contact with each other at least when they are arranged in a compressed state between the piston and the spring retainer. It is in a state.

Specifically, the apex of the 4th mountain portion 4Ya contacts the apex of the 3rd valley portion 3Ta having the shortest distance in the axial direction and the circumferential direction, and the apex of the 4th mountain portion 4Yb has the shortest distance in the axial direction and the circumferential direction. The apex of the 3rd valley 3Tb that is close is in contact with the apex of the 3rd valley 3Tc that has the shortest distance in the axial direction and the circumferential direction, and the apex of the 4th mountain 4Yd is the axis. It is in contact with the apex of the third valley portion 3Td having the shortest distance in the direction and the circumferential direction.

In this way, the first volume portion 11 to the fourth volume portion 14 of each stage correspond alternately in a state of being sandwiched between the previous stage and the next stage except for the uppermost stage and the lowermost stage, that is, each mountain portion is the front stage. Each valley corresponds to the next mountain. It should be noted that this correspondence relationship is not limited to the case where the number of turns is four, and if the number of turns has two or more turns, the correspondence is made in the same state regardless of the number of turns.

By the way, in such a coiled wave spring 10, when expanding and contracting, a circumferential deviation (twist) at each contact portion, a radial deviation (tilt) at each stage, an order change or entanglement (kinking) of the wire rod S, and so on. May occur.

Therefore, the engaging portion 20 (so that the vertices of the respective amplitudes of the first winding portion 11 to the fourth winding portion 14 of each stage are closest to each other (contacting) with each other so as to be able to engage with each other. 1 (B)) and an engaging portion 40 (see 4 (B)) are provided. In the following description, in the description of the valley and the mountain except for a specific part, they are abbreviated as "Tanibe T" and "Yamabe Y" or "Taniyama TY".

Hereinafter, the detailed configuration of the engaging portion 20 of the present embodiment will be described with reference to FIG.

As shown in FIG. 3, the engaging portion 20 projects from the valley portion T in the front stage facing each other along the axial direction toward the valley side, and has an engaging concave surface portion 21a on the mountain side surface. It has an engaging convex surface portion 22a that protrudes from the combined projection portion 21 and the next-stage mountain portion Y facing each other in the same direction as the engaged projection portion 21 and that can engage with the engaging concave surface portion 21a. It has an engaging protrusion 22 and.

The engaged protrusion 21 and the engaged protrusion 22 are formed so as to have a ridge line along the radial direction so as to span the entire width of the wire rod S.

Here, the coiled wave spring 10 gives a desired urging force by being in a compressed state when mounted on, for example, a clutch unit of a transmission. Therefore, at the time of molding, for example, as shown in FIG. 3B, the valley portion T and the mountain portion Y may be in a state where the vertices of the valley portion T and the mountain portion Y are not in contact with each other.

However, when the coiled wave spring 10 is mounted, it is desirable that the engaging portion 20 is in an properly engaged state. Therefore, the protruding end of the engaging projection portion 22 is provided with respect to the engaging concave surface portion 21a. It is desirable that only the depth D is inserted.

In such a basic configuration, the coiled wave spring 10 according to the present embodiment is made of a spirally wound wire S in order to suppress the displacement of the wire S and thus sufficiently exert the desired spring function. A coiled wave spring 10 in which a plurality of valley portions T and a plurality of mountain portions Y are alternately provided on a plurality of stages of winding portions 11 to 14 with an amplitude along the axial direction, and the plurality of valley portions T and a plurality of valley portions T are provided. The mountain portion Y is such that each valley portion T in the previous stage and each mountain portion Y in the next stage face each other so as to be in contact with each other, and the valley portion T and the mountain portion Y in the facing portion are on one side in the axial direction. It is provided with an engaging portion 20 that projects toward and engages with each other.

Next, the operation of the coiled wave spring 10 according to the present embodiment will be described. In the above configuration, when the coiled wave spring 10 receives a load in the direction along the axis Q, particularly in the direction of compression, the coiled wave spring 10 is compressed against the bias according to the load.

At this time, since the contact portions of the vertices of each valley portion T and each peak portion Y have an arcuate shape in which the contact portions of the vertices project in opposite directions, the action of shifting in the circumferential direction is particularly likely to work.

However, each valley portion T and each peak portion Y in the facing portions that can come into contact with each other are provided with engaging portions 20 that project toward one side in the axial direction and can engage with each other.

The engaging portion 20 has an engaged protrusion 21 having an engaging concave surface portion 21a having the same shape, which is different in size, and an engaging protrusion portion having an engaging convex surface portion 22a that can be engaged with the engaging concave surface portion 21a. 22 and.

Therefore, when the engaged protrusion 21 and the engaged protrusion 22 are in the engaged state, it is possible to suppress the displacement of the wire rod S in the circumferential direction.

As described above, the coiled wave spring 10 according to the present embodiment has a plurality of valley portions T and a plurality of valley portions T having an amplitude along the axial direction in the winding portions 11 to 14 of the plurality of stages composed of the wire rod S wound in a spiral shape. A coiled wave spring 10 in which mountain portions Y are alternately provided, and the plurality of valley portions T and the plurality of mountain portions Y are in contact with each other in each valley portion T in the previous stage and each mountain portion Y in the next stage. In addition to being able to face each other as much as possible, the valley portion T and the mountain portion Y at the facing portion are provided with an engaging portion 20 that projects toward one side in the axial direction and can engage with each other, thereby suppressing the displacement of the wire rod S. Therefore, the desired spring function can be fully exerted.

Further, the engaging portion 20 according to the present embodiment protrudes from the valley portion T (or the mountain portion Y of the next stage) facing each other toward the mountain side (or valley side), and also protrudes toward the mountain side (or valley side). The engaged protrusion 21 having the engaging concave surface 21a on the surface of the mountain side) and the next mountain portion Y (or the valley portion T in the previous stage) facing each other toward the engaged protrusion 21 in the same direction. By having the engaging projection portion 22 having the engaging concave surface portion 21a and the engaging convex surface portion 22a that can be engaged with each other while projecting, the same shape can be obtained in both large and small sizes, and for example, each Taniyama TY. By a simple processing process such as punching the contact portion of the two at the same time, it is possible to surely secure the engaged state between the two.

Further, the coiled wave spring 10 according to the present embodiment is formed by forming the engaged protrusion 21 and the engaged protrusion 22 over the entire width of the wire S so as to have a ridge line along the radial direction. The deviation of the wire rod S in the circumferential direction can be efficiently suppressed.

At this time, the engaging portions 20 are formed at a plurality of locations in the circumferential direction, and the ridge lines are along the radial direction. Therefore, the diameter of the wire rod S is due to the overall synergistic effect of each engaging portion 20, that is, the presence of the engaging portion 20 having a ridge line extending in a direction intersecting the load input direction with respect to the load in the radial direction. It is possible to suppress the deviation of the direction.

[Second Embodiment]
Next, the details of the coiled wave spring according to the second embodiment will be described with reference to FIGS. 4 and 5. In the second embodiment, in the first embodiment, the coiled wave spring 30 is provided with an engaging portion 40 including a mountain-shaped engaged protrusion 41 and an engaging protrusion 42.

The engaging portion 40 projects from the valley portion T of the previous stage facing each other toward the valley side, and has the engaged protrusion portion 41 having the engaging concave surface portion 41a on the mountain side surface, and the engaging portion 40 of the next stage facing each other. It has an engaging protrusion 42 that protrudes from the mountain portion Y in the same direction as the engaged protrusion 41 and has an engaging convex portion 42a that can be engaged with the engaging concave surface portion 41a.

Even in such a configuration, it is possible to suppress the deviation in the circumferential direction and the radial direction as in the above embodiment.

(Application example of coiled wave spring)
FIG. 6 shows an example in which the phase of the contact portion is shifted by setting the coiled wave spring 50 according to the above embodiment to a wavelength λ−α in which the phase value α is shortened. In FIG. 6, substantially the same configuration as that of the above embodiment is designated by the same reference numerals, and the description thereof will be omitted.

That is, in the above embodiment, the case where the vertices of the coiled wave springs 10 and 30 are in contact with each other along the axis Q has been described, but as shown in FIG. 6, the phase of the contact portion is shifted by the angle θ. It can also be applied to the coiled wave spring 50.

That is, the coiled wave spring 50 shown in FIG. 6 has the same inner diameter and the same number of stages as the coiled wave spring 10 shown in FIG. 1 and the coiled wave spring 30 shown in FIG. 4, but is formed in FIG. As shown in (A), the apex position is shifted by the phase value α as shown in FIG. 6 (B) by forming a spiral with a wavelength λ-α shorter than the wavelength λ shown in the above embodiment. As a result, the phase of the contact portion (peak) is shifted.

In such a case, as shown in FIG. 6C, for example, since the apex position of the valley portion T in the previous stage and the apex position of the mountain portion Y in the next stage are deviated by the phase value α, the intermediate position P thereof. The same action and effect as described above can be obtained by forming the apex (ridge line) of the engaging portion 40 (engaging portion 20) at a position corresponding to the intermediate position P.

[Other application examples / deformation examples]
In addition, the present invention is carried out with various modifications without departing from the spirit of the present invention.

For example, in the above-described embodiment, the engaging portions 20 and 40 are configured to project from the valley portion T along the axis Q toward the valley side opposite to the mountain side, but the reverse is also possible.

That is, from the engaged protrusion having an engaging concave surface on the valley side by projecting the engaging portion from the mountain portion of the next stage facing each other toward the mountain side opposite to the valley side, and from the valley portion of the previous stage. It may be configured to have an engaging protrusion portion that protrudes in the same direction as the engaged protrusion and has an engaging convex surface portion that can be engaged with the engaging concave surface portion.

In the above description, when there are descriptions such as "same", "equal", "different", "match", and "along" in the external dimensions and sizes, each of these descriptions does not have a strict meaning. That is, "same", "equal", and "different" mean that tolerances and errors in design and manufacturing are allowed, and "substantially the same", "substantially equal", "substantially different", and "substantially different". It means "coincidence" and "substantially along". The tolerance and error here mean a unit within a range that does not deviate from the configuration, action, and effect of the present invention.

10 Coiled wave spring 11 Volume 1 (winding part)
12 Volume 2 (Volume)
13 Volume 3 (Volume)
14 Volume 4 (Volume)
20 Engagement part 21 Engagement protrusion 21a Engagement concave part 22 Engagement protrusion 22a Engagement convex part S Wire rod Q Axis T T valley part Y Mountain part

Claims (2)

A coiled wave spring in which a plurality of valleys and a plurality of peaks are alternately provided with an amplitude along the axial direction in a multi-stage winding portion made of a spirally wound plate-shaped wire.
The plurality of valleys and the plurality of peaks face each other so that each valley in the previous stage and each mountain in the next stage can contact each other, and the valley and the mountain in the facing portion are facing each other. It has an engaging part that protrudes toward one side in the axial direction and can engage with each other.
The apex position of each valley of the previous stage and the apex position of each mountain of the next stage in the circumferential direction of the coiled wave spring are different.
A plurality of contact positions, which are intermediate positions between the apex position of each valley portion in the previous stage and the apex position of each mountain portion in the next stage, are provided at different positions in the circumferential direction.
The apex position of the engaging portion in the circumferential direction coincides with the contact position in the circumferential direction.
The wire rod is
It is made of a metal material and has a rectangular cross-sectional shape that is long in the radial direction.
The engaging portion is
An engaged protrusion portion that protrudes from the valley portion in the previous stage toward the valley side and has an engaging concave surface portion on the mountain side surface.
It has an engaging protrusion portion that protrudes from the mountain portion of the next stage in the same direction as the engaged protrusion portion and has an engaging convex surface portion that can be engaged with the engaging concave surface portion.
The engaged protrusion and the engaging protrusion have a dome shape.
The surface on the mountain portion side of the engaging concave surface portion is in contact with the surface on the valley portion side of the engaging convex surface portion.
A coiled wave spring that features that. A coiled wave spring in which a plurality of valleys and a plurality of peaks are alternately provided with an amplitude along the axial direction in a multi-stage winding portion made of a spirally wound plate-shaped wire.
The plurality of valleys and the plurality of peaks face each other so that each valley in the previous stage and each mountain in the next stage can contact each other, and the valley and the mountain in the facing portion are facing each other. It has an engaging part that protrudes toward one side in the axial direction and can engage with each other.
The apex position of each valley of the previous stage and the apex position of each mountain of the next stage in the circumferential direction of the coiled wave spring are different.
A plurality of contact positions, which are intermediate positions between the apex position of each valley portion in the previous stage and the apex position of each mountain portion in the next stage, are provided at different positions in the circumferential direction.
The apex position of the engaging portion in the circumferential direction coincides with the contact position in the circumferential direction.
The wire rod is
It is made of a metal material and has a rectangular cross-sectional shape that is long in the radial direction.
The engaging portion is
An engaged protrusion portion that protrudes from the mountain portion of the next stage toward the mountain side and has an engaging concave surface portion on the valley side surface.
It has an engaging protrusion portion that protrudes from the valley portion of the previous stage in the same direction as the engaged protrusion portion and has an engaging convex surface portion that can be engaged with the engaging concave surface portion.
The engaged protrusion and the engaging protrusion have a dome shape.
The surface on the valley side of the engaging concave surface portion is in contact with the surface on the mountain portion side of the engaging convex surface portion.
A coiled wave spring that features that.

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