WO2018230491A1

WO2018230491A1 - Coiled wave spring

Info

Publication number: WO2018230491A1
Application number: PCT/JP2018/022193
Authority: WO
Inventors: 真矢松下
Original assignee: いすゞ自動車株式会社
Priority date: 2017-06-15
Filing date: 2018-06-11
Publication date: 2018-12-20
Also published as: JP6907743B2; CN110741177B; JP2019002483A; CN110741177A

Abstract

A coiled wave spring having multiple alternating valley parts and crest parts with an amplitude along an axial direction in a coiled section of multiple layers constituted by a wire material wound in a spiral shape, wherein the multiple valley parts and crest parts oppose each other such that the valley parts of a preceding layer and the crest parts of a subsequent layer are capable of contacting each other, and the valley parts and crest parts at the region where they oppose each other are provided with a resistance section having a greater friction coefficient than at other regions.

Description

Coiled wave spring

This disclosure relates to a coiled wave spring that is formed in a spiral shape while meandering a flat wire rod with an amplitude having a height along the axial direction.

A coiled wave spring (also referred to simply as “wave spring”) that is formed in a spiral shape while meandering a flat wire with an amplitude having a height along the axial direction is known (see, for example, Patent Document 1). .

For example, in a clutch unit of an automatic transmission, a coiled wave spring is provided between a piston that presses a friction engagement element and a spring retainer that is locked to a stationary member, along with displacement along the axial direction of the piston. It arrange | positions as a return spring which expands and contracts (for example, refer patent document 2).

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

However, in such a coiled wave spring disclosed in the prior art document, there is a possibility that the contact portion is displaced in the circumferential direction when it expands and contracts, and the wire does not contact at the apex (twist). In addition, when expanding and contracting out of the axial direction, each step is displaced in the radial direction, and there is a possibility that the wire may not contact at the apex (falling down). Furthermore, when such a circumferential shift or radial shift occurs, there is a risk that the order of the wires positioned above and below may be changed or entangled (twisted). Therefore, when such a shift | offset | difference generate | occur | produces in a coiled wave spring, there exists a possibility that an expected spring function cannot fully be exhibited.

The present disclosure provides a coiled wave spring that can suppress the deviation of the wire and thus sufficiently exert the expected spring function.

The coiled wave spring of the present disclosure is a coiled wave spring having alternately a plurality of troughs and a plurality of crests with an amplitude along the axial direction on a plurality of winding parts made of a spirally wound wire. The plurality of troughs and the plurality of crests are opposed to each other so that the troughs in the previous stage and the crests in the next stage can contact each other, and the troughs and the crests in the facing part are more than other parts. Is also provided with a resistance portion having a large friction coefficient.

In the above-described coiled wave spring, the wire may be formed of a metal material, and may have a rectangular cross-sectional shape that is long in the radial direction. You may provide the contact surface which can contact the other opposing surface in the at least one opposing surface of the peak part of the next step.

In the coiled wave spring described above, the contact surface may have a large friction coefficient by having at least one of a plurality of grooves or ridges extending along at least one of the circumferential direction or the radial direction.

In the above-described coiled wave spring, the contact surface may have a rough surface member whose surface is previously roughened to increase the friction coefficient.

According to the present disclosure, it is possible to suppress the deviation of the wire and thus to fully exhibit the expected spring function.

1 (A) and 1 (B) show a coiled wave spring according to the first embodiment, FIG. 1 (A) is a side view of the coiled wave spring, and FIG. 1 (B) is a coiled wave spring. FIG. FIG. 2 is an explanatory diagram of a state in which the coiled wave spring according to the first embodiment is developed in a plane. 3 (A), 3 (B), 3 (C), and 3 (D) show the coiled wave spring according to the first embodiment, and FIG. 3 (A) is an enlarged side view of the main part. 3 (B) is an enlarged perspective view (mountain side) of the main part in the valley, FIG. 3 (C) is an enlarged perspective view (valley side) of the main part in the mountain, and FIG. 3 (D) is a contact. It is the principal part of the example which formed the concave groove of the part separately. 4 (A), 4 (B), and 4 (C) show a coiled wave spring according to the second embodiment, FIG. 4 (A) is an enlarged side view of the main part, and FIG. 4 (B). FIG. 4C is an enlarged perspective view (mountain side surface) of the main part in the valley part, and FIG. 4C is an enlarged perspective view (valley side surface) of the main part in the mountain part. 5A, FIG. 5B, and FIG. 5C show a coiled wave spring according to another embodiment, FIG. 5A is a side view of the coiled wave spring, and FIG. ) Is an enlarged side view of the main part, and FIG. 5C is an explanatory view showing the arrangement relationship of the resistance parts.

Hereinafter, a coiled wave spring according to an embodiment of the present disclosure will be described based on the attached drawings. The same parts are denoted by the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[First embodiment]
FIG. 1 shows a coiled wave spring according to the first embodiment. The coiled wave spring 10 of this embodiment is arrange | positioned at the damper unit for vehicles, a flywheel unit, a differential unit, a clutch unit etc., for example.

In the coiled wave spring 10 shown below, for example, in a clutch unit of a transmission, it is disposed between a piston that presses a friction engagement element and a spring retainer that is locked to a fixed member, and serves 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 circular shape in plan view, and a rectangular shape whose cross-sectional shape perpendicular to the circumferential direction is long in the radial direction, that is, a flat wire 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 perpendicular to the radial direction. For the coiled wave spring 10, a metal material such as a stainless steel material having a flat cross section having a width along the radial direction is preferably used as the wire.

The coiled wave spring 10 includes a plurality of winding portions 11 to 14 excluding a portion less than one turn (one round) including the uppermost and

lowermost ends

10a and 10b in the drawing.

Here, the “winding part” means a part of one turn (one turn) of the coiled wave spring 10. In the present embodiment, the number of turns of the coiled wave spring 10 is four (four steps) except for a part that is less than one turn including the uppermost and

lowermost ends

10a and 10b in the drawing for convenience of explanation. 11-14.

The 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 (radial direction) and thickness (axial direction) of the wire S, and the inner diameter are determined by the coiled wave spring 10. It is possible to change appropriately according to conditions, such as a site to use and a spring constant.

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

In addition, in the description of the relationship between the winding parts 11 to 14 in the state adjacent to each other in the vertical direction shown in FIG. 1A, except for the case where the specific winding parts 11 to 14 are described. The upper side in the figure will be referred to as “previous stage” and the lower side in the figure will be 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, the third winding portion 13, from the upper side shown in FIG. This is referred to as the fourth volume 14.

Further, a portion that is less than one turn (one round) including both

ends

10a and 10b positioned at the uppermost and lowermost positions shows a configuration that contributes as a part of the repulsive force in a meandering state in the illustrated example. However, some have a flat configuration without forming a meandering state. Therefore, although a detailed description is omitted in consideration of the case where the flat structure does not have a direct repulsive force, a part having the same structure as the winding parts 11 to 14 is omitted. Are assumed to have the same structure, operation, and effect.

As shown in FIG. 2, the first winding part 11 includes four first valley parts 1Ta to 1Td and four first mountain parts 1Ya to 1Yd alternately. The first valley portions 1Ta to 1Td and the first peak portions 1Ya to 1Yc alternately (meander) continuously at equal intervals in the circumferential direction. Note that the number and height of the amplitude accompanying the meandering, the wavelength λ, and the like can be changed as appropriate depending on the site 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 waveform, for example, a sine curve or a cosine curve can be used.

The 2nd volume part 12 is continuously extended from the 1st volume part 11, and is located under the 1st volume part 11 (next stage). The second winding portion 12 includes four second valley portions 2Ta to 2Td and four second peak portions 2Ya to 2Yd alternately. The second valleys 2Ta to 2Td and the second peaks 2Ya to 2Yd are alternately continued at equal intervals in the circumferential direction. In addition, the 1st trough part 1Td of the circumferential direction next step end (illustration right side edge part) of the 1st winding part 11 and the 2nd trough of the circumferential direction front stage end part (illustration left side end part) of the 2nd winding part 12 are shown. The portion 2Ta also serves as a boundary at the vertex that protrudes most downward.

Here, the second valleys 2Ta to 2Td correspond to the first peaks 1Ya to 1Yd, and the second peaks 2Ya to 2Yd correspond to the first valleys 1Ta to 1Td. Note that “corresponding” means the state shown in FIG. 1A, that is, the circumferential direction when the coiled wave spring 10 is viewed from the radial direction (left and right direction in FIG. 1A) and the axial direction ( This is based on the vertical direction in FIG.

For example, the fact that the second valleys 2Ta to 2Td correspond to the first peaks 1Ya to 1Yd means that the bottom of the second valleys 2Ta to 2Td and the peaks of the first peaks 1Ya to 1Yd It is shown that it is in the farthest position in the direction along, and the closest position in the circumferential direction.

Specifically, the valley bottom of the second valley portion 2Ta is farthest from the peak of the first peak portion 1Ya having the longest distance in the axial direction and the closest distance in the circumferential direction, and the valley bottom of the second valley portion 2Tb is in the axial direction. The first peak that is the farthest and farthest from the peak of the first peak 1Yb that is the closest in the circumferential direction, and the bottom of the second valley 2Tc is the farthest in the axial direction and the closest in the circumferential direction The most distant from the summit of the portion 1Yc, and the bottom of the second trough 2Td is farthest from the summit of the first summit 1Yd having the longest distance in the axial direction and the shortest distance in the circumferential direction.

Similarly, the fact that the second peaks 2Ya-2Yd correspond to the first valleys 1Ta-1Td means that the peaks of the second peaks 2Ya-2Yd and the valleys of the first valleys 1Ta-1Td It shows that it is in the closest position in the direction and the circumferential direction. In the present embodiment, the peaks of the second peaks 2Ya to 2Yd and the valleys of the first valleys 1Ta to 1Td are in contact with each other when disposed in a compressed state at least between the piston and the spring retainer. It is in a state.

Specifically, the peak of the second peak 2Ya is in contact with the bottom of the first valley 1Ta that has the shortest distance in the axial direction and the circumferential direction, and the peak of the second peak 2Yb has the longest distance in the axial and circumferential directions. The peak of the first peak part 1Tb is in contact with the peak of the second peak part 2Yc, the peak of the first peak part 1Tc is closest in the axial direction and the circumferential direction, and the peak of the second peak part 2Yd is the axis. 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.

In addition, the wire rod S has a long width in the radial direction. Therefore, strictly speaking, the “contact” state means that each ridge line (hereinafter also referred to as “mountain ridge line”) along the radial direction of the front surface on the top of each of the second peak portions 2Ya to 2Yd. This means that the ridgelines along the radial direction of the next-stage surface at the bottom of the first valley portions 1Ta to 1Td (hereinafter also referred to as “valley-side ridgelines”) are in contact with each other. However, including the error, the mountain side ridge line and the valley side ridge line are not necessarily in contact with each other in the circumferential direction. Further, in the following description, for convenience of explanation, “mountain side ridge line” is also referred to as “mountain side vertex” or simply “vertex”, and “valley side ridge line” is also referred to as “valley side vertex” or simply “vertex”. Furthermore, since the ridge lines are in contact with each other in a meandering state, depending on the degree of compression, both may be not in line contact but in surface contact having a length in the circumferential direction along with elastic deformation of the wire rod S. .

The third winding part 13 extends continuously from the second winding part 12 and is located below the second winding part 12. The third winding portion 13 has four third valley portions 3Ta to 3Td and four third peak portions 3Ya to 3Yd alternately. The third valley portions 3Ta to 3Td and the third peak portions 3Ya to 3Yd are alternately continued at equal intervals in the circumferential direction. Note that the second valley portion 2Td at the circumferentially next-stage end portion (right side end portion in the figure) of the second winding portion 12 and the third valley at the circumferential direction front-stage end portion (left side end portion in the drawing) of the third winding portion 13. The portion 3Ta also serves as a boundary at the vertex that protrudes most downward.

Here, the third valleys 3Ta to 3Td correspond to the second peaks 2Ya to 2Yd, and the third peaks 3Ya to 3Yd correspond to the second valleys 2Ta to 2Td.

For example, the fact that the third valley portions 3Ta to 3Td correspond to the second peak portions 2Ya to 2Yd means that the apex of the third valley portions 3Ta to 3Td and the apex of the second peak portions 2Ya to 2Yd are in the axial direction. It shows that it is in the most distant position in and the closest position in the circumferential direction.

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

Similarly, the fact that the third peaks 3Ya-3Yd and the second valleys 2Ta-2Td correspond to each other means that the apex of the third peaks 3Ya-3Yd and the apex of the second valleys 2Ta-2Td It shows that it is in the closest position in the direction and the circumferential direction. In the present embodiment, the apex of the third peak 3Ya to 3Yd and the apex of the second valley 2Ta to 2Td are in contact with each other when disposed in a compressed state at least between the piston and the spring retainer. It is in a state.

Specifically, the apex of the third peak 3Ya is in contact with the apex of the second valley 2Ta that has the closest distance in the axial direction and the circumferential direction, and the apex of the third peak 3Yb has the greatest distance in the axial direction and the peripheral direction. The apex of the second valley portion 2Tb is in contact with the apex of the third peak portion 3Yc, the apex of the second valley portion 2Tc that is closest in the axial direction and the circumferential direction, and the apex of the third peak portion 3Yd is the axis. It is in contact with the apex of the second valley portion 2Td that has the shortest distance in the direction and the circumferential direction.

The fourth winding part 14 extends continuously from the third winding part 13 and is located below the third winding part 13. The fourth winding portion 14 has four fourth valley portions 4Ta to 4Td and four fourth peak portions 4Ya to 4Yd alternately. The fourth valley portions 4Ta to 4Td and the fourth peak portions 4Ya to 4Yd are alternately continued at equal intervals in the circumferential direction. Note that the third trough 3Td at the end of the third winding portion 13 in the circumferential direction (right side end in the drawing) and the fourth valley at the end in the circumferential direction of the fourth winding portion 14 (left end in the drawing). The portion 4Ta also serves as a boundary at the vertex that protrudes most downward.

Here, the fourth valleys 4Ta to 4Td correspond to the third peaks 3Ya to 3Yd, and the fourth peaks 4Ya to 4Yd correspond to the third valleys 3Ta to 3Td.

For example, the fact that the fourth valleys 4Ta to 4Td correspond to the third peaks 3Ya to 3Yd means that the vertexes of the fourth valleys 4Ta to 4Td and the peaks of the third peaks 3Ya to 3Yd are in the axial direction. It shows that it is in the most distant position in and the closest position in the circumferential direction.

Specifically, the vertex of the fourth valley portion 4Ta is farthest from the vertex of the third peak portion 3Ya having the longest distance in the axial direction and the closest distance in the circumferential direction, and the vertex of the fourth valley portion 4Tb is in the axial direction. The third peak that is the farthest and farthest from the apex of the third peak 3Yb that is the closest in the circumferential direction, and the apex of the fourth valley 4Tc is the farthest in the axial direction and the closest in the circumferential direction The vertex of the portion 3Yc is farthest from the vertex, and the vertex of the fourth valley portion 4Td is farthest from the vertex of the third peak 3Yd having the longest distance in the axial direction and the shortest distance in the circumferential direction.

Similarly, the fact that the fourth peaks 4Ya-4Yd and the third valleys 3Ta-3Td correspond to each other means that the vertexes of the fourth peaks 4Ya-4Yd and the peaks of the third valleys 3Ta-3Td are axes. It shows that it is in the closest position in the direction and the circumferential direction. In the present embodiment, the apex of the fourth peak portions 4Ya to 4Yd and the apex of the third valley portions 3Ta to 3Td are in contact with each other when disposed in a compressed state at least between the piston and the spring retainer. It is in a state.

Specifically, the apex of the fourth peak 4Ya is in contact with the apex of the third valley 3Ta that has the closest distance in the axial direction and the circumferential direction, and the apex of the fourth peak 4Yb has the greatest distance in the axial direction and the peripheral direction. The vertex of the third valley portion 3Tb is in contact, the vertex of the fourth mountain portion 4Yc is in contact with the vertex of the third valley portion 3Tc that is closest in the axial direction and the circumferential direction, and the vertex of the fourth mountain portion 4Yd is the axis line. 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 to fourth winding portions 11 to 14 of each stage correspond alternately with each other being sandwiched between the previous stage and the next stage except for the uppermost stage and the lowermost stage. Each valley corresponds to the next peak. Note that this correspondence relationship is not limited to the case where the number of turns is four, and corresponds to the same state regardless of the number of turns as long as the number of turns has two or more turns.

By the way, such a coiled wave spring 10 has a circumferential displacement (twist) at each contact portion, a radial displacement (falling) at each step, a change in the order of the wire rods S and a entanglement (kinking) during expansion and contraction. May occur.

Therefore, the opposing portions where the vertices of the respective amplitudes of the first winding portion 11 to the fourth winding portion 14 of each stage are closest (contacted) to each other can be engaged with each other more than other portions. A resistance portion 20 or a resistance portion 30 (see FIG. 1B) having a large friction coefficient is provided. In the following description, in the description of the valley and the mountain except for a specific part, they are abbreviated as “valley T” and “mountain Y” or “taniyama TY”.

Hereinafter, based on FIGS. 3A to 3D, a detailed configuration of the resistance unit 20 of the present embodiment will be described.

As shown in FIG. 3A, the resistance portion 20 includes a contact surface that can be in contact with the other at least one of a front valley portion T and a next mountain portion Y that face each other.

Specifically, the resistance portion 20 includes a valley-side resistance portion 21 formed on an opposing surface Tm that is near the apex of the trough T at the previous stage and faces the peak Y at the next stage, and the apex of the crest Y at the next stage. And a mountain-side resistance portion 22 formed on the opposing surface Ym that is in the vicinity and faces the trough portion T in the previous stage.

For example, as illustrated in FIG. 3B, the valley-side resistance portion 21 of the resistance portion 20 has a plurality of concave grooves (or ridges) 23 a extending along the circumferential direction on the facing surface Tm and along the radial direction. A plurality of concave grooves (or ridges) 23b extending includes a contact surface 23 having a friction coefficient larger than that of other portions as a substantially lattice-shaped rough surface.

Similarly, for example, as illustrated in FIG. 3C, the mountain-side resistor 22 of the resistor 20 includes a plurality of grooves (or ridges) 24 a extending in the circumferential direction on the facing surface Ym and in the radial direction. By a plurality of concave grooves (or ridges) 24b extending along, a contact surface 24 having a friction coefficient larger than that of other portions is provided as a rough surface having a substantially lattice shape.

Note that the contact surface 23 and the contact surface 24 are not limited to a rough surface having a lattice shape by the concave grooves (or ridges) 23a and 23b and the concave grooves (or ridges) 24a and 24b. For example, as shown in FIG. 3D, the resistance portion 25 formed in the vicinity of the apex of the facing surface Tm (Ym) includes a plurality of concave grooves (or ridges) 26a extending in the circumferential direction and a radial direction. It is good also as the contact surface 26 which made the friction coefficient larger than the other site | part as the rough surface which formed the several groove | channel (or convex stripe) 26b extended along separately.

At this time, the concave groove (or ridge) 26a and the concave groove (or ridge) 26b are circumferentially arranged so as to sandwich a plurality of concave grooves (or ridges) 26a extending along the circumferential direction. In order to suppress the radial displacement of the wire rod S and arrange a plurality of grooves (or ridges) 26b extending along the diameter direction adjacent to both ends of the groove (or ridge) 26a. And it is preferable to arrange so that the deviation of the wire S in the circumferential direction is suppressed.

That is, the radial displacement of the wire S is likely to occur at a position including the apex, and the circumferential displacement of the wire S is shifted away from the apex. Therefore, in order to suppress these efficiently, the concave grooves (or ridges) 26a are arranged near the apex, and the concave grooves (or ridges) 26b are arranged so as to be adjacent to both ends in the circumferential direction. Good. In addition, you may arrange | position the ditch | groove (or ridge) 26b from a vertex to both ends so that it may overlap with the ditch | groove (or ridge) 26a.

In such a basic configuration, the coiled wave spring 10 according to the present embodiment suppresses the deviation of the wire S, and therefore, from the wire S wound in a spiral shape, in order to sufficiently exhibit the expected spring function. A coiled wave spring 10 having a plurality of valleys T and a plurality of crests Y alternately with an amplitude along the axial direction in a plurality of stages of windings 11 to 14, wherein the plurality of troughs T and a plurality of crests The portion Y is opposed to each other so that the respective valley portions T in the previous stage and the respective mountain portions Y in the next stage can come into contact with each other, and the valley portions T and the mountain portions Y in the opposed portions have a coefficient of friction more than other portions. A large resistor 20 is provided.

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, in particular, in the compressing direction, the coiled wave spring 10 is compressed against the bias according to the load.

At this time, each valley T and each peak Y have arc shapes in which the contact portions at the apexes protrude in opposite directions, and thus the action of shifting in the circumferential direction is particularly likely to work. Moreover, if it receives the load to radial direction etc. in addition to the expansion-contraction direction, it will also shift | deviate to radial direction.

However, each trough portion T and each crest portion Y in opposing portions that can contact each other are provided with resistance portions 20 having a larger friction coefficient than other portions.

The resistance portion 20 includes a valley-side resistance portion 21 and a mountain-side resistance portion 22 on each of the opposing faces Tm, Ym of the previous-stage trough portion T and the next-stage crest portion Y, and near each apex thereof. Includes contact surfaces 23 and 24 that can contact each other. The contact surfaces 23 and 24 have a plurality of grooves (or ridges) 23a and 24a extending along the circumferential direction and a plurality of grooves (or ridges) 23b and 24b extending along the radial direction. The coefficient of friction is larger than that of the part.

Therefore, when the contact surface 23 and the contact surface 24 are in contact with each other, the plurality of grooves (or ridges) 23b and 24b extending along the radial direction are caught in the circumferential direction of the wire S. When the plurality of grooves (or ridges) 23a and 24a extending along the circumferential direction are caught with each other, the deviation of the wire S in the radial direction can be suppressed.

As described above, the coiled wave spring 10 according to the present embodiment includes a plurality of trough portions T and a plurality of trough portions T with a plurality of winding portions 11 to 14 made of the wire S wound in a spiral shape with an amplitude along the axial direction. A coiled wave spring 10 having alternating ridges Y, wherein a plurality of valleys T and a plurality of ridges Y can be in contact with each other at each of the previous valleys T and each of the following peaks Y. The valley portion T and the mountain portion Y at the facing portion are provided with the resistance portion 20 having a larger friction coefficient than the other portions, thereby suppressing the deviation of the wire rod S, and thus the desired spring function. It can be fully demonstrated.

Further, in the resistance portion 20 according to the present embodiment, the wire S has a rectangular cross-sectional shape that is long in the radial direction by a metal material, and the resistance portion 20 includes the trough T and the next trough T that are opposite to each other. By providing the contact surfaces 23 and 24 that can come into contact with the other facing surfaces Ym and Tm on at least one facing surface Tm and Ym of the stepped ridge Y, it is possible to provide a wide resistance portion instead of a line including the apex, The deviation in the circumferential direction and the radial direction can be efficiently suppressed.

In the coiled wave spring 10 according to the present embodiment, the contact surface 23 and the contact surface 24 have a plurality of concave grooves (or at least one of ridges) 23a extending along at least one of the circumferential direction or the radial direction. By being 23b, 24a, 24b, the displacement of the wire S with respect to the circumferential direction can be efficiently suppressed while being simple processing.

At this time, the resistance portion 20 is formed at a plurality of locations in the circumferential direction, and the ridgeline is along the radial direction. Therefore, the overall synergistic effect of each resistance portion 20, that is, for the load in the radial direction, for example, due to the presence of the resistance portion 20 having a ridge line extending in the direction intersecting the load input direction, The shift can be suppressed.

[Second Embodiment]
Next, details of the coiled wave spring according to the second embodiment will be described with reference to FIGS. 4 (A), 4 (B), and 4 (C). The second embodiment is the same as the first embodiment in which the resistance portion 30 is provided with

rough surface members

31 and 32 whose surfaces are roughened in advance on the opposing surfaces Tm and Ym of the valley portion T and the mountain portion Y, respectively. It is a thing.

The

rough surface members

31 and 32 are provided with

contact surfaces

33 and 34 having a friction coefficient increased by previously roughening the surface. In FIG. 4, components that are substantially the same as those in the above embodiment are given the same reference numerals, and descriptions thereof are omitted.

As the rough surface processing of the contact surfaces 33 and 34, for example, a sandblasted rough surface processed member may be provided. Further, as the roughening of the contact surfaces 33 and 34, for example, a friction resistance member such as a rubber sheet may be provided.

As described above, the contact surfaces 33 and 34 have the

rough surface members

31 and 32 whose surfaces are roughened in advance, thereby increasing the coefficient of friction. Similar to the configuration, the circumferential and radial shifts can be suppressed.

[Application example of coiled wave spring]
5 (A), 5 (B), and 5 (C) show the phase of the contact portion by changing the coiled wave spring 40 according to the above embodiment to a wavelength λ-α that is shortened by the phase value α. A shifted example is shown. In FIG. 5, components that are substantially the same as those in the above embodiment are given the same reference numerals, and descriptions thereof are omitted.

That is, in the above embodiment, the case where each vertex of the coiled wave spring 10 is in contact with the axis Q has been described. However, as shown in FIG. Application to the wave spring 40 is also possible.

That is, the coiled wave spring 40 shown in FIGS. 5A, 5B, and 5C is formed with the same inner diameter and the same number of steps as the coiled wave spring 10 shown in FIG. However, as shown in FIG. 5 (A), a spiral is formed with a wavelength λ-α shorter than the wavelength λ shown in the above embodiment, and as shown in FIG. By shifting, the phase of the contact portion (vertex) is shifted. In FIG. 5B, reference numeral C1 is the vertex position of the first valley 1Ta that is the previous valley T, reference C2 is the vertex position of the second peak 2Ya that is the next peak Y, and reference C3. Indicates the vertex position of the third valley portion 3Ta, which is the previous valley portion T, and symbol C4 indicates the vertex position of the fourth mountain portion 4Ya, which is the next mountain portion Y.

In such a case, as shown in FIG. 5C, for example, the vertex position of the valley T at the previous stage and the vertex position of the peak Y at the next stage are shifted by the phase value α. By arranging the contact surfaces 23, 24, 26, 33, and 34 within the range of the phase value α with the intermediate position P as the center, the same operation and effect as described above can be obtained.

[Other applications and modifications]
In addition, the present disclosure is implemented with various modifications within a range not departing from the gist thereof.

For example, in the above-described embodiment, the

resistance portions

20 and 30 are processed or made of a solid material, but a liquid material having high viscosity may be used. In addition, the

resistance units

20 and 30 may be either the valley T at the previous stage or the peak Y at the next stage. Furthermore, the

resistance parts

20 and 30 are different between the trough T at the previous stage and the crest Y at the next stage, for example, by changing the depth and interval of the grooves between the

concave grooves

23a and 23b and the

concave grooves

24a and 24b. The coefficient of friction may be used.

In the above description, when there are descriptions such as “same”, “equal”, “different”, “match”, “along”, etc., these descriptions are not strict meanings. That is, “same”, “equal”, and “different” allow tolerances and errors in design, manufacturing, etc., and are “substantially the same”, “substantially equal”, “substantially different”, “substantially different” It means “match” and “substantially follow”. Here, tolerance and error mean units within a range not departing from the configuration, operation, and effect of the present disclosure.

This application is based on a Japanese patent application (Japanese Patent Application No. 2017-117467) filed on June 15, 2017, the contents of which are incorporated herein by reference.

10 Coiled Wave Spring 11 Volume 1 (Volume)
12 Volume 2 (Volume)
13 Volume 3 (Volume)
14 Volume 4 (Volume)
20 resistance portion 21 valley side resistance portion 22 mountain side resistance portion 23 contact surface 23a concave groove 23b concave groove 24 contact surface 24a concave groove 24b concave groove 25 resistance portion 26 contact surface 26a concave groove 26b concave groove S wire rod Q axis T valley portion Tm Opposite surface Y Yamabe Ym Opposite surface

Claims

A coiled wave spring having a plurality of troughs and a plurality of crests alternately with an amplitude along the axial direction on a plurality of winding portions made of a spirally wound wire,
The plurality of valleys and the plurality of peaks are opposed to each other so that the valleys of the previous stage and the peaks of the next stage can contact each other.
The trough and the crest at the facing part include a resistance part having a larger coefficient of friction than other parts,
Coiled wave spring.
The wire is
It is formed of a metal material and has a rectangular cross-sectional shape that is long in the radial direction,
The resistance portion is
Provided with a contact surface that can be in contact with the other facing surface on at least one facing surface of the trough portion of the previous stage and the crest portion of the next stage facing each other
The coiled wave spring according to claim 1.
The contact surface is
The friction coefficient is increased by having at least one of a plurality of grooves or ridges extending along at least one of the circumferential direction or the radial direction,
The coiled wave spring according to claim 2.
The contact surface is
The friction coefficient was increased by having a rough surface member whose surface was previously roughened,
The coiled wave spring according to claim 2.