阅读说明：本技术 螺旋波纹弹簧 (Spiral corrugated spring ) 是由 寺岛幸士 于 2018-06-11 设计创作，主要内容包括：一种螺旋波纹弹簧,其在由卷绕成螺旋状的线材构成的多段的卷部中以沿轴线方向的振幅交替地具有多个谷部和多个峰部,多个谷部和多个峰部中前段的各谷部与下一段的各峰部相互可接触地相对,该相对部位中的谷部及峰部具备向轴线方向的一侧突出并相互可卡合的卡合部。(A spiral wave spring comprising a plurality of coil portions formed of a wire rod wound in a spiral shape and having a plurality of valley portions and a plurality of peak portions alternately arranged at an amplitude in an axial direction, wherein the valley portions and the peak portions of the plurality of peak portions at a front stage are arranged to face the peak portions of a lower segment in a mutually contactable manner, and wherein the valley portions and the peak portions of the facing portions are provided with engaging portions projecting toward sides in the axial direction and engageable with each other.)

1, A helical wave spring having a plurality of valleys and a plurality of peaks alternately with an amplitude in an axial direction in a multi-stage coil of wire material wound in a spiral shape,

the plurality of valley portions and the valley portions of the front section of the plurality of peak portions are opposite to the peak portions of the lower section in a contact manner;

the valley portions and the peak portions in the facing portions include engaging portions that protrude toward the -side in the axial direction and are engageable with each other.

2. The helical wave spring as claimed in claim 1,

the wire is formed of a metal material and has a rectangular cross-sectional shape that is long in the radial direction;

the engaging portion includes:

an engaged protrusion protruding from direction of the crest of the mutually opposing front-stage trough or lower stage toward direction of crest side or trough side, and having an engaging concave portion on the other surface of crest side or trough side, and

and an engaging projection projecting in the same direction as the engaged projection from the other direction of the valley portion of the front stage or the crest portion of the lower stage facing each other, and having an engaging convex surface portion engageable with the engaging concave surface portion.

3. The helical wave spring as claimed in claim 2,

the engaged protrusion and the engaging protrusion span the entire width of the wire material so as to have a ridge in the radial direction.

4. The helical wave spring as claimed in claim 2,

the engaged protrusion and the engaging protrusion are mountain-shaped.

Technical Field

The present disclosure relates to a helical wave spring in which a flat wire is formed into a spiral shape while meandering with an amplitude of height in an axis direction.

Background

A helical wave spring (also simply referred to as a "wave spring") is known in which a flat wire is formed into a spiral shape while meandering at an amplitude of a height in an axial direction (see, for example, patent document 1).

For example, in a clutch unit of an automatic transmission, a helical wave spring is arranged as a return spring which is arranged to expand and contract with displacement in an axial direction of a piston between the piston which presses a frictional engagement element and a spring retainer which is engaged with a fixed-side member (for example, see patent document 2).

[ Prior art documents ]

[ patent document ]

Patent document 1: japanese laid-open patent publication No. 2015-043728

Patent document 2: japanese unexamined patent application publication No. 2010-201041

Disclosure of Invention

[ problems to be solved by the invention ]

However, in the helical wave spring disclosed in such a prior art document, the contact portion is displaced in the circumferential direction at the time of expansion and contraction, and the wire may become out of contact at the apex (torsion). Further, when the wire rod is expanded and contracted while being displaced from the axial direction, the segments are displaced in the radial direction, and the wire rod may not come into contact (fall) at the apex. Further, when such circumferential displacement or radial displacement occurs, the order of the wires positioned above and below may be exchanged or wound (twisted). Therefore, when such a displacement occurs in the helical bellows spring, the desired spring function may not be sufficiently exhibited.

The present disclosure provides types of spiral wave springs capable of suppressing the displacement of a wire rod, thereby sufficiently exhibiting a desired spring function.

[ means for solving the problems ]

The helical wave spring of the present disclosure is a helical wave spring having a plurality of valleys and a plurality of crests alternately at an amplitude in an axial direction in a multi-stage coil portion formed of a wire rod wound in a spiral shape, wherein each of the valleys of a front stage of the plurality of valleys and the plurality of crests and each of the crests of a lower stage are opposed to each other in a contact manner, and wherein the valleys and crests of the opposed portions include engagement portions which protrude to sides in the axial direction and are engageable with each other.

In the above-described spiral wave spring, the wire member may be made of a metal material and have a rectangular cross-sectional shape that is long in the radial direction, and the engaging portion may have an engaged protrusion that protrudes from the direction peak side or direction valley side of the valley portion of the front stage or the crest portion of the lower section that face each other and has an engaging concave portion on the other surface of the peak side or the trough side, and an engaging protrusion that protrudes from the other direction of the valley portion of the front stage or the crest portion of the lower section that face each other in the same direction as the engaged protrusion and has an engaging convex portion that is engageable with the engaging concave portion.

In the above-described spiral wave spring, the engaged protrusion and the engaging protrusion may extend over the entire width of the wire rod so as to have a ridge line in the radial direction.

In the above-described spiral wave spring, the engaged protrusion and the engaging protrusion may have a mountain shape.

Effects of the invention

According to the present disclosure, the wire can be prevented from being displaced, and thus a desired spring function can be sufficiently exhibited.

Drawings

Fig. 1 (a) and 1 (B) show a helical bellows spring according to embodiment 1, in which fig. 1 (a) is a side view of the helical bellows spring, and fig. 1 (B) is a plan view of the helical bellows spring.

Fig. 2 is an explanatory view of a state in which the spiral wave spring of embodiment 1 is developed in a planar manner.

Fig. 3 (a), 3 (B), and 3 (C) show a spiral wave spring according to embodiment 1, in which fig. 3 (a) is an enlarged perspective view of a main portion, fig. 3 (B) is an enlarged cross-sectional view of a main portion in a state where an engagement portion is separated, and fig. 3 (C) is an enlarged cross-sectional view of a main portion in a state where an engagement portion is in contact (an engaged state).

Fig. 4 (a) and 4 (B) show a helical bellows spring according to embodiment 2, fig. 4 (a) is a side view of the helical bellows spring, and fig. 4 (B) is a plan view of the helical bellows spring.

Fig. 5 (a), 5 (B), and 5 (C) show a spiral wave spring according to embodiment 2, in which fig. 5 (a) is an enlarged perspective view of a main portion, fig. 5 (B) is an enlarged cross-sectional view of a main portion in a state where the engaging portion is separated, and fig. 5 (C) is an enlarged cross-sectional view of a main portion in a state where the engaging portion is in contact (engaged state).

Fig. 6 (a), 6 (B), and 6 (C) show a helical bellows spring according to another embodiment, fig. 6 (a) is a side view of the helical bellows spring, fig. 6 (B) is an enlarged side view of a main portion, and fig. 6 (C) is an explanatory view showing an arrangement relationship of engagement portions.

Detailed Description

Hereinafter, the helical bellows springs according to the embodiments of the present disclosure will be described with reference to the drawings, and the same components will be denoted by the same reference numerals and have the same names and functions.

[ embodiment 1 ]

Fig. 1 shows a helical wave spring according to embodiment 1. The helical bellows spring 10 of the present embodiment is disposed in, for example, a damper unit, a flywheel unit, a differential unit, a clutch unit, and the like of a vehicle.

The below-described spiral wave spring 10 is exemplified as a member that is disposed between a piston that presses a friction engagement element and a spring retainer that is locked to a fixed-side member, and functions as a return spring in a clutch unit of a transmission, for example. Further, the helical wave spring 10 is preferably disposed in a compressed state.

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

The spiral wave spring 10 includes a plurality of winding portions 11 to 14 in addition to portions less than windings (1 circumference) including both ends 10a, 10b at the uppermost position and the lowermost position on the drawing.

Here, the "lap" means a portion of the spiral wave spring 10 that is laps (1-cycle), and for convenience of explanation, the number of laps of the spiral wave spring 10 is 4 (4) laps 11 to 14, except for a portion of less than laps including both ends 10a and 10b at the uppermost position and the lowermost position in the figure.

The number of turns of the coils 11 to 14, the amount of displacement of meandering (height corresponding to the amplitude), the width (radial direction) or thickness (axial direction) of the wire S, the inner diameter, and other conditions may be appropriately changed depending on the location where the spiral wave spring 10 is used, the spring constant, and other conditions.

The spiral bellows spring 10 is not limited to being disposed (attached) so that the extending direction of the axis line Q is the vertical direction (or the vertical direction), and may be disposed in the horizontal direction (or the vertical direction) or the oblique direction, as shown in fig. 1, for example.

In the explanation of the relationship among the components in the state of being adjacent in the vertical direction shown in fig. 1 (a) in each of the winding parts 11 to 14, the upper side in the drawing is referred to as "front stage" and the lower side in the drawing is referred to as "lower stage" except for the explanation of the specific winding part 11 to 14, and therefore, in the explanation below, in the explanation of the specific winding part 11 to 14, the winding parts 1, 2, 3, and 4 are referred to as the winding part 11, 12, 13, and 14 from the upper stage shown in fig. 1 (a).

Further, the portion of less than rolls (1 circumference) including both ends 10a, 10b located at the uppermost position and the lowermost position is configured to function as the portion of the repulsive force by being formed in the meandering state in the illustrated example, but may be configured to be flat without being formed in the meandering state.

As shown in fig. 2, the 1 st lap 11 includes 41 st troughs 1Ta to 1Td and 41 st crests 1Ya to 1Yd alternately. The 1 st valleys 1Ta to 1Td and the 1 st peaks 1Ya to 1Yc are alternately continuous (meandering) at equal intervals in the circumferential direction. The number of amplitudes, heights, wavelength λ, and the like associated with the meandering can be appropriately changed depending on the portion where the spiral bellows spring 10 is used, the set spring constant, and the like (the same applies to the following description). For example, a sine curve or a cosine curve can be used as the waveform.

The 2 nd roll portion 12 extends continuously from the 1 st roll portion 11 and is positioned below (lower th) the 1 st roll portion 11, the 2 nd roll portion 12 is provided with 42 nd valleys 2Ta to 2Td alternately with 42 nd crests 2Ya to 2 Yd. and 2 nd troughs 2Ta to 2Td alternately with 2 nd crests 2Ya to 2Yd alternately continuously at equal intervals in the circumferential direction, and the 1 st valley 1Td of the end portion (right end portion in the drawing) on the lower th roll portion in the circumferential direction of the 1 st roll portion 11 and the 2 nd valley 2Ta of the end portion (left end portion in the drawing) on the front stage in the circumferential direction of the 2 nd roll portion 12 share the peak projecting most downward as a boundary.

Here, the 2 nd valleys 2Ta to 2Td correspond to the 1 st peaks 1Ya to 1Yd, and the 2 nd peaks 2Ya to 2Yd correspond to the 1 st valleys 1Ta to 1 Td. The term "corresponding" refers to a state shown in fig. 1a, that is, a state based on a circumferential direction (a left-right direction of the paper surface of fig. 1 a) and an axial direction (a vertical direction of the paper surface of fig. 1 a) when the spiral wave spring 10 is viewed from the radial direction.

For example, the 2 nd valleys 2Ta to 2Td correspond to the 1 st peaks 1Ya to 1Yd, and the 2 nd valleys 2Ta to 2Td and the 1 st peaks 1Ya to 1Yd are located at the farthest positions in the direction along the axis Q and at the closest positions in the circumferential direction.

Specifically, the valley bottom of the 2 nd valley 2Ta is farthest from the peak top of the 1 st crest 1Ya which is farthest in the axial direction and closest in the circumferential direction, the valley bottom of the 2 nd valley 2Tb is farthest from the peak top of the 1 st crest 1Yb which is farthest in the axial direction and closest in the circumferential direction, the valley bottom of the 2 nd valley 2Tc is farthest from the peak top of the 1 st crest 1Yc which is farthest in the axial direction and closest in the circumferential direction, and the valley bottom of the 2 nd valley 2Td is farthest from the peak top of the 1 st crest 1Yd which is farthest in the axial direction and closest in the circumferential direction.

Similarly, the 2 nd crests 2Ya to 2Yd correspond to the 1 st troughs 1Ta to 1Td, and the 2 nd crests 2Ya to 2Yd and the 1 st troughs 1Ta to 1Td are positioned closest to each other in the axial direction and the circumferential direction. In the present embodiment, the peaks of the 2 nd crests 2Ya to 2Yd and the valleys of the 1 st valleys 1Ta to 1Td are in contact with each other at least when they are disposed in a compressed state between the piston and the spring retainer.

Specifically, the peak of the 2 nd crest 2Ya contacts the valley bottom of the 1 st trough 1Ta which is closest in the axial direction and the circumferential direction, the peak of the 2 nd crest 2Yb contacts the valley bottom of the 1 st trough 1Tb which is closest in the axial direction and the circumferential direction, the peak of the 2 nd crest 2Yc contacts the valley bottom of the 1 st trough 1Tc which is closest in the axial direction and the circumferential direction, and the peak of the 2 nd crest 2Yd contacts the valley bottom of the 1 st trough 1Td which is closest in the axial direction and the circumferential direction.

The state of "contact" is strictly defined as a state in which the ridge line in the radial direction (hereinafter also referred to as "peak side ridge line") of the front-stage side surface at the peak top of each of the 2 nd crest portions 2Ya to 2Yd and the ridge line in the radial direction (hereinafter also referred to as "valley side ridge line") of the lower stage side surface at the valley bottom of each of the 1 st trough portions 1Ta to 1Td are in contact with each other , but the state includes an error, and the peak side ridge line and the valley side ridge line are not limited to being in contact with each other in the circumferential direction.

The 3 rd roll portion 13 extends continuously from the 2 nd roll portion 12 and is positioned below the 2 nd roll portion 12. the 3 rd roll portion 13 alternately has 43 rd troughs 3Ta to 3Td and 43 rd crests 3Ya to 3 Yd. and 3 rd troughs 3Ta to 3Td and 3 rd crests 3Ya to 3Yd alternately continuing in the circumferential direction at equal intervals, and further, the 2 nd trough 2Td of the end portion (the right end portion in the drawing) on the lower th in the circumferential direction of the 2 nd roll portion 12 and the 3 rd trough 3Ta of the end portion (the left end portion in the drawing) on the front stage in the circumferential direction of the 3 rd roll portion 13 share the apex projecting most downward as a boundary.

Here, the 3 rd troughs 3Ta to 3Td correspond to the 2 nd crests 2Ya to 2Yd, and the 3 rd crests 3Ya to 3Yd correspond to the 2 nd troughs 2Ta to 2 Td.

For example, the 3 rd valleys 3Ta to 3Td and the 2 nd peaks 2Ya to 2Yd correspond to each other and indicate positions where the apexes of the 3 rd valleys 3Ta to 3Td and the apexes of the 2 nd peaks 2Ya to 2Yd are farthest in the axial direction and closest in the circumferential direction.

Specifically, the apex of the 3 rd valley 3Ta is farthest from the apex of the 2 nd crest 2Ya which is farthest in the axial direction and closest in the circumferential direction, the apex of the 3 rd valley 3Tb is farthest from the apex of the 2 nd crest 2Yb which is farthest in the axial direction and closest in the circumferential direction, the apex of the 3 rd valley 3Tc is farthest from the apex of the 2 nd crest 2Yc which is farthest in the axial direction and closest in the circumferential direction, and the apex of the 3 rd valley 3Td is farthest from the apex of the 2 nd crest 2Yd which is farthest in the axial direction and closest in the circumferential direction.

Similarly, the 3 rd ridges 3Ya to 3Yd correspond to the 2 nd valleys 2Ta to 2Td, and indicate positions where the apexes of the 3 rd ridges 3Ya to 3Yd and the apexes of the 2 nd valleys 2Ta to 2Td are closest in the axial direction and the circumferential direction. In the present embodiment, the apexes of the 3 rd crest portions 3Ya to 3Yd and the apexes of the 2 nd trough portions 2Ta to 2Td are in contact with each other at least when the crest portions and the 2 nd trough portions are disposed in a compressed state between the piston and the spring retainer.

Specifically, the apex of the 3 rd crest 3Ya contacts the apex of the 2 nd trough 2Ta closest to the crest in the axial direction and the circumferential direction, the apex of the 3 rd crest 3Yb contacts the apex of the 2 nd trough 2Tb closest to the crest in the axial direction and the circumferential direction, the apex of the 3 rd crest 3Yc contacts the apex of the 2 nd trough 2Tc closest to the crest in the axial direction and the circumferential direction, and the apex of the 3 rd crest 3Yd contacts the apex of the 2 nd trough 2Td closest to the crest in the axial direction and the circumferential direction.

The 4 th roll portion 14 extends continuously from the 3 rd roll portion 13 and is positioned below the 3 rd roll portion 13. the 4 th roll portion 14 alternately has 4 th valleys 4Ta to 4Td and 4 th crests 4Ya to 4 Yd. 4 th valleys 4Ta to 4Td and 4 th crests 4Ya to 4Yd alternately continuously at equal intervals in the circumferential direction, and the 3 rd valley 3Td of the end portion (the right end portion in the drawing) on the lower th in the circumferential direction of the 3 rd roll portion 13 and the 4 th valley 4Ta of the end portion (the left end portion in the drawing) on the front stage in the circumferential direction of the 4 th roll portion 14 share the apex which protrudes most downward as a boundary.

Here, the 4 th troughs 4Ta to 4Td correspond to the 3 rd crests 3Ya to 3Yd, and the 4 th crests 4Ya to 4Yd correspond to the 3 rd troughs 3Ta to 3 Td.

For example, the 4 th valleys 4Ta to 4Td and the 3 rd peaks 3Ya to 3Yd correspond to each other and indicate that the apexes of the 4 th valleys 4Ta to 4Td and the apexes of the 3 rd peaks 3Ya to 3Yd are at the farthest positions in the axial direction and the closest positions in the circumferential direction.

Specifically, the apex of the 4 th valley 4Ta is farthest from the apex of the 3 rd crest 3Ya which is farthest in the axial direction and closest in the circumferential direction, the apex of the 4 th valley 4Tb is farthest from the apex of the 3 rd crest 3Yb which is farthest in the axial direction and closest in the circumferential direction, the apex of the 4 th valley 4Tc is farthest from the apex of the 3 rd crest 3Yc which is farthest in the axial direction and closest in the circumferential direction, and the apex of the 4 th valley 4Td is farthest from the apex of the 3 rd crest 3Yd which is farthest in the axial direction and closest in the circumferential direction.

Similarly, the 4 th crests 4Ya to 4Yd correspond to the 3 rd troughs 3Ta to 3Td, and this indicates that the apexes of the 4 th crests 4Ya to 4Yd are closest to the apexes of the 3 rd troughs 3Ta to 3Td in the axial direction and the circumferential direction. In the present embodiment, the apexes of the 4 th crests 4Ya to 4Yd and the apexes of the 3 rd troughs 3Ta to 3Td are in contact with each other at least when the apexes are disposed in a compressed state between the piston and the spring retainer.

Specifically, the apex of the 4 th crest 4Ya contacts the apex of the 3 rd trough 3Ta which is closest in distance in the axial direction and the circumferential direction, the apex of the 4 th crest 4Yb contacts the apex of the 3 rd trough 3Tb which is closest in distance in the axial direction and the circumferential direction, the apex of the 4 th crest 4Yc contacts the apex of the 3 rd trough 3Tc which is closest in distance in the axial direction and the circumferential direction, and the apex of the 4 th crest 4Yd contacts the apex of the 3 rd trough 3Td which is closest in distance in the axial direction and the circumferential direction.

In this way, the 1 st to 4 th winding parts 11 to 14 of each segment correspond alternately with the preceding segment and the lower segment in a state sandwiched between segments except for the uppermost segment and the lowermost segment, that is, each crest corresponds to a trough of the preceding segment and each trough corresponds to a crest of the lower segment, and the correspondence is not limited to the case where the number of windings is 4, and if the number of winding parts is 2 or more, the winding parts correspond to the same state regardless of the number of windings.

Further, such a helical wave spring 10 may be subjected to circumferential deflection (torsion) at each contact portion, radial deflection (toppling) of each segment, and sequential exchange or winding (twisting) of the wire S when expanding or contracting.

Therefore, in the opposite portions where the apexes of the amplitudes of the 1 st to 4 th wrap portions 11 to 14 of each stage are closest to (in contact with) each other, the engaging portion 20 (see fig. 1B) and the engaging portion 40 (see fig. 4B) are provided so as to be engageable with each other. In the following description, the valley portions and the peak portions other than the specific portions will be simply referred to as "valley portion T" and "peak portion Y" or "valley portion TY".

The detailed structure of the engaging portion 20 of the present embodiment will be described below with reference to fig. 3.

As shown in fig. 3, the engaging portion 20 includes an engaged protrusion 21 which protrudes in the axial direction from the valley portion T of the front stage facing each other toward the valley side and has an engaging concave portion 21a on the peak side surface, and an engaging protrusion 22 which protrudes in the same direction as the engaged protrusion from the peak portion Y of the lower facing each other and has an engaging convex portion 22a engageable with the engaging concave portion 21 a.

The engaged protrusion 21 and the engaging protrusion 22 are formed across the entire width of the wire S so as to have ridges along the radial direction.

Here, the spiral wave spring 10 is a member that is compressed to apply a desired biasing force when attached to a clutch unit of a transmission, for example. Therefore, in the molding, for example, as shown in fig. 3 (B), the apexes of the trough portions T and the peak portions Y may be in a non-contact state.

However, since it is desired that the engaging portion 20 be appropriately engaged when the spiral bellows spring 10 is attached, it is preferable that the protruding end of the engaging protrusion 22 be recessed by a depth D from the engaging recessed surface portion 21 a.

In such a basic configuration, the helical bellows spring 10 of the present embodiment suppresses the wire S from being displaced, thereby sufficiently exhibiting a desired spring function, and therefore is a helical bellows spring 10 having a plurality of trough portions T and a plurality of crest portions Y alternately with an amplitude in the axial direction in a plurality of winding portions 11 to 14 formed by winding the wire S in a helical shape, wherein each trough portion T at the front of the plurality of trough portions T and the plurality of crest portions Y and each crest portion Y at the lower are opposed to each other in a contact manner, and the trough portions T and the crest portions Y at the opposed portions include engagement portions 20 that project to the side in the axial direction and are engageable with each other.

Next, the operation of the spiral bellows spring 10 of the present embodiment will be described. In the above configuration, when the helical bellows spring 10 receives a load in the direction of the axis Q, particularly in the compression direction, it is compressed against the biasing force according to the load.

In this case, the contact portions between the apexes of the valley portions T and the crest portions Y are arc-shaped and protrude in opposite directions, and therefore, the action of particularly trying to shift in the circumferential direction is easily exerted.

However, the engaging portions 20 that project toward the side in the axial direction and are engageable with each other are provided in the valley portions T and the crest portions Y at the mutually contactable opposing portions.

The engaging portion 20 includes an engaged protrusion 21 and an engaging protrusion 22 having the same shape and different sizes, wherein the engaged protrusion 21 has an engaging concave portion 21a, and the engaging protrusion 22 has an engaging convex portion 22a engageable with the engaging concave portion 21 a.

Therefore, the engaged protrusion 21 and the engaging protrusion 22 are engaged with each other, so that the wire S can be prevented from being displaced in the circumferential direction.

As described above, the helical bellows spring 10 of the present embodiment is a helical bellows spring 10 in which a plurality of valley portions T and a plurality of crest portions Y are alternately provided at an amplitude in the axial direction in a plurality of winding portions 11 to 14 formed of a wire material S wound in a helical shape, wherein the valley portions T at the front stage among the plurality of valley portions T and the plurality of crest portions Y and the crest portions Y at the lower stage are opposed to each other in a contact manner, and the valley portions T and the crest portions Y at the opposed portions are provided with engaging portions 20 that protrude to the side in the axial direction and are engageable with each other, whereby the wire material S can be prevented from being displaced, and a desired spring function can be sufficiently exhibited.

The engaging portion 20 of the present embodiment includes the engaged protrusion 21 that protrudes toward the peak side (or the valley side) from the mutually opposing front-stage valley portions T (or the peak portions Y of the lower ), and has the engaging concave portion 21a on the valley side (or the peak side) surface, and the engaging protrusion 22 that protrudes in the same direction as the engaged protrusion 21 from the mutually opposing front-stage valley portions Y (or the front-stage valley portions T) and has the engaging convex portion 22a engageable with the engaging concave portion 21a, so that the engaging portions can be formed in different sizes and the same shape, and the engaging state can be reliably secured between the two by simultaneously performing a simple processing step such as press processing on the contact portion of each valley portion TY.

In addition, in the spiral wave spring 10 of the present embodiment, the engaged protrusion 21 and the engaging protrusion 22 are formed so as to have the ridge line in the radial direction across the entire width of the wire material, and thus, the displacement of the wire material S in the circumferential direction can be effectively suppressed.

At this time, the engaging portions 20 are formed at a plurality of circumferential positions, and the ridge lines are along the radial direction. Therefore, the overall synergistic effect of the engagement portions 20, that is, the presence of the engagement portions 20 having ridges extending in the direction intersecting the load input direction with respect to the load in the radial direction, can suppress the displacement of the wire material S in the radial direction.

[ 2 nd embodiment ]

Next, the details of the spiral wave spring according to embodiment 2 will be described with reference to fig. 4 and 5. In embodiment 2, the engagement portion 40 including the mountain-shaped engaged protrusion 41 and the engagement protrusion 42 is used in the spiral wave spring 30 in embodiment 1.

The engaging portion 40 includes an engaged protrusion 41 protruding from a valley portion T of the front stage facing each other toward a valley portion and having an engaging concave portion 41a on a peak side surface, and an engaging protrusion 42 protruding from a peak portion Y of the lower facing each other in the same direction as the engaged protrusion 41 and having an engaging convex portion 42a engageable with the engaging concave portion 41 a.

In such a configuration, as in the above-described embodiment, the circumferential and radial misalignment can be suppressed.

(application example of spiral ripple spring)

Fig. 6 shows an example in which the phase of the contact portion is shifted by setting the spiral ripple spring 50 of the above embodiment to the wavelength λ - α in which the wavelength is shortened by the phase value α, and in fig. 6, the same reference numerals are given to the substantially same components as those of the above embodiment, and the description thereof is omitted.

That is, in the above-described embodiment, the case where the respective apexes of the spiral wave springs 10 and 30 are in contact along the axis Q has been described, but the present invention is also applicable to a spiral wave spring 50 in which the phase of the contact portion is shifted by the angle θ as shown in fig. 6.

That is, the spiral wave spring 50 shown in fig. 6 is formed with the same inner diameter and the same number of stages as those of the spiral wave spring 10 shown in fig. 1 and the spiral wave spring 30 shown in fig. 4, but is formed in a spiral shape with a wavelength λ - α shorter than the wavelength λ shown in the above embodiment as shown in fig. 6 (a), and the phase of the contact portion (apex) is shifted by shifting the apex position by the phase value α as shown in fig. 6 (B).

In this case, as shown in fig. 6C, for example, the apex position of the valley T of the preceding stage and the apex position of the peak Y of the lower are shifted by the phase value α, and therefore, by using the intermediate position P as the contact portion and forming the apex (ridge line) of the engaging portion 40 (engaging portion 20) at a position corresponding to the intermediate position P , the same operation and effect as described above can be obtained.

[ other application examples and modifications ]

The present disclosure can be implemented with various modifications without departing from the scope of the present disclosure.

For example, in the above embodiment, the engaging portions 20 and 40 are configured to protrude from the trough portion T along the axis Q toward the trough portion opposite to the peak portion, but the opposite may be adopted.

That is, the engaging portion may be configured to include an engaged protrusion portion that protrudes from a crest portion of the mutually opposing lower segments toward a crest portion opposite to the trough side and has an engaging concave portion on the trough side, and an engaging protrusion portion that protrudes from the trough portion of the front segment in the same direction as the engaged protrusion and has an engaging convex portion engageable with the engaging concave portion.

In the above description, when there are descriptions such as "same", "equal", "different", " -derived", "along", etc. in terms of dimensions or sizes in appearance, these descriptions do not strictly mean that "same", "equal", "different", etc. mean that a tolerance or an error in design or manufacturing is allowed, and "substantially the same", "substantially equal", "substantially different", "substantially -derived", or "substantially along".

The present application is based on the japanese patent application filed on 6/15/2017 (japanese application 2017-117466), the contents of which are hereby incorporated by reference.

[ Industrial availability ]

According to the present disclosure, the wire can be prevented from being displaced, and thus a desired spring function can be sufficiently exhibited.

[ description of reference numerals ]

10 spiral corrugated spring

11 st 1 roll (roll)

12 nd 2 nd roll part (roll part)

13 No. 3 roll part (roll part)

14 th 4 th roll (roll)

20 engaging part

21 are engaged with the protruding part

21a engaging concave part

22 engaging projection

22a engaging convex surface portion

S wire

Axis Q

T trough part

Y peak