JP2017227241A - Compression type coil spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compression type coil spring in which a compression repulsion acts homogeneously in a circumferential direction.SOLUTION: In this compression type coil spring 1, one band-shaped spring material 3 is wound in a plurality of layers of a coil shape, and is formed with a waveform H continuing periodically in the longitudinal direction of the spring material 3. The length of one circumference of each layer S is equal to integer times of the wavelength of a wave form, and the spring material 3 is formed with a phase conversion part 5 for phase-shifting the waveform H.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a compression type coil spring in which a spring material is wound in a plurality of layers in a coil shape and a waveform that is periodically continuous along the longitudinal direction of the spring material is formed.

  2. Description of the Related Art Conventionally, in vehicles such as automobiles, a compression type called a wave spring in which a plurality of layers of a belt-shaped spring material is wound into a coil shape and a waveform that is periodically continuous along the longitudinal direction of the spring material is formed. A coil spring is used.

  Such compression type coil springs are adjacent to each other by setting the length of one turn obtained by winding a plurality of layers of a spring material in a coil shape to a length obtained by adding a half wavelength to an integral multiple of the waveform wavelength. A corrugated concave top and a convex top can be brought into contact with each other, and a desired spring constant and compression stroke amount are ensured (Patent Document 1).

  However, as described above, in order to set the length of one rotation of the compression coil spring to a length obtained by adding a half wavelength to an integral multiple of the waveform wavelength, for example, a plurality of convex tops for one rotation. Of these, the first convex top and the last convex top are closer to each other than the circumferential spacing between the other convex tops. That is, since the waveform is not uniformly formed in the circumferential direction, the compression repulsion force of the compression coil spring may be biased in the circumferential direction.

Japanese Unexamined Patent Publication No. 2015-48868

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a compression type coil spring in which a compression repulsion force acts evenly in the circumferential direction.

  The present invention relates to a compression type coil spring in which a single strip-shaped spring material is wound in a plurality of layers in a coil shape, and a waveform that is periodically continuous along the longitudinal direction of the spring material is formed. The length of the circumference is equal to an integral multiple of the wavelength of the waveform, and the spring material is provided with a phase conversion unit for phase shifting the waveform.

  In the present invention, the length of one round of each layer is set to an integral multiple of the wavelength so that the convex tops and the concave tops of the corrugations are brought into contact with each other, and the phase converter is connected to the spring material. By providing this, a structure in which the convex tops and the concave tops of the waveform are shifted in the circumferential direction between the two layers connected by the phase conversion unit is made possible. In particular, by providing a phase conversion part at the connection part between all adjacent layers, a structure in which the convex tops of the corrugations and the concave tops are shifted in the circumferential direction between all the adjacent layers is possible. .

  One or a plurality of phase conversion units can be provided. When a plurality of phase conversion units are provided, they are provided at intervals from each other along the longitudinal direction of the spring material. The phase shift amount is set to a desired length within a range of less than one wavelength.

  By this invention, since the length of one round of each layer is an integral multiple of the wavelength, each convex top of the waveform can be arranged at equal intervals in the circumferential direction in each layer, that is, the waveform can be formed uniformly in the circumferential direction, Thereby, the compression repulsion force of a compression type coil spring can be made to act equally in the circumferential direction.

  Moreover, since the phase conversion part is provided in the spring material, the corrugated convex tops and the concave tops can be shifted in the circumferential direction between two layers connected by the phase conversion part. Accordingly, the compression coil spring can be formed so as to include a layer in which the convex top portions and the concave top portions are shifted from each other with a single spring material.

As an aspect of the present invention, the phase converter can shift the phase of the waveform by a half wavelength.
According to this invention, the convex top part and the concave top part of the waveform can be brought into contact between two layers connected by the phase conversion part.

  Moreover, as an aspect of this invention, it is comprised by two or more layers which the said spring material adjoins, The some convex tops of the said waveform and concave tops contact between the said two or more adjacent layers. Provided with a winding bundle, the phase conversion section for phase-shifting the waveform so that the convex tops and the concave tops of the corrugation are shifted between the adjacent winding bundles is provided at a connection portion of the adjacent winding bundles. be able to.

  According to the present invention, since the corrugated convex tops and the concave tops are in contact with each other between the layers, a sufficiently large spring constant can be obtained even if the compression coil spring is miniaturized.

  Moreover, in order to phase-shift the waveform so that the convex tops and the concave tops of the waveform are shifted between the adjacent winding bundles by providing a phase conversion part at the connection part of the adjacent winding bundles, It can function as a spring part independent of each other. Thereby, it becomes easy to set the spring constant of the compression coil spring to a desired value, and it is possible to secure a sufficient amount of compression stroke when a compression load is applied.

  Conventionally, a compression-type coil spring in which a plurality of layers of a belt-shaped spring material is wound and a waveform that is periodically continuous along the longitudinal direction of the spring material is formed with a sufficient spring constant even when downsized. In order to ensure a sufficient compression stroke amount, the plurality of layers are divided into a plurality of winding bundles, and between each layer in the same winding bundle, the corrugated convex tops and the concave tops are brought into contact with each other. Between the matching winding bundles, the corrugated convex top and the concave top are brought into contact with each other.

  However, in the compression type coil spring having such a structure, it is necessary to configure a plurality of wave springs in combination. However, since the combination work is performed manually, there is a problem that the production efficiency is low, and the combined wave springs. There is a problem that the product accuracy is lowered due to the relative displacement. That is, it has been impossible to provide a compression type coil spring that is small and has a sufficient spring constant and a sufficient amount of compression stroke, and that can improve productivity and product accuracy.

  However, according to the present invention, by providing the phase conversion portion in the spring material, a layer (that is, a wound bundle) in which the convex top portions and the concave top portions of the corrugated shape contact each other with adjacent spring layers. The compression coil spring can be formed so as to include a layer in which the convex tops and the concave tops are shifted between adjacent layers. Thereby, even if it does not combine several wave springs, it has a small and sufficient spring constant and sufficient compression stroke amount, and can improve productivity and product precision. That is, the above problem can be solved.

Moreover, as an aspect of the present invention, the number of turns of each of the plurality of winding bundles can be made the same.
According to the present invention, the spring characteristics of the plurality of winding bundles can be made the same. Thereby, the spring characteristic of the whole compression type coil spring can be made into a linear characteristic.

As an aspect of the present invention, the number of windings of at least one winding bundle among the plurality of winding bundles can be made different from the number of windings of other winding bundles.
According to the present invention, the spring constant of at least one winding bundle among the plurality of winding bundles can be made different from the spring constant of other winding bundles. Thereby, the spring characteristic of the whole compression type coil spring can be made into a nonlinear characteristic.

  Further, as an aspect of the present invention, a flat winding portion where the corrugation is not formed is provided between the adjacent winding bundles, and the flat winding portion is provided at the winding end of one winding bundle among the adjacent winding bundles. The other winding bundle can be formed.

  According to this invention, when a compressive load is applied, it is possible to prevent the convex top portion of the corrugation on one winding bundle side from shifting along the inclined portion of the corrugation on the other winding bundle side between adjacent winding bundles. The change in spring characteristics due to the deviation can be suppressed.

As an aspect of the present invention, the diameter of at least one of the plurality of winding bundles can be made different from the diameter of the other winding bundles.
According to the present invention, the spring constant of at least one winding bundle among the plurality of winding bundles can be made different from the spring constant of other winding bundles. Thereby, the spring characteristic of the whole compression type coil spring can be made into a nonlinear characteristic.

Moreover, as an aspect of the present invention, at least one end portion of both end portions in the longitudinal direction of the spring material can be protruded inside the compression type coil spring.
According to the present invention, when the bolt is fitted into the compression coil spring and fastened at a predetermined fastening position, the end of the spring material protruding inside the compression coil spring is engaged with the side surface of the bolt. The compression coil spring can be temporarily fixed to the bolt. Thereby, what inserted the volt | bolt inside the compression type coil spring can be handled as an integrated object, and the fastening to a predetermined fastening location can be performed easily.

  Further, as an aspect of the present invention, a plurality of the phase conversion portions are provided along the longitudinal direction of the spring material, and those adjacent to each other along the longitudinal direction of the spring material are not arranged in a line in the spring compression direction. Can be provided.

  In addition, as a method of providing such a phase conversion unit, adjacent phase conversion units along the longitudinal direction of the spring material are provided so as to be displaced zigzag along the spring compression direction, or viewed from the spring compression direction. The plurality of phase converters are provided so as to be evenly distributed in the circumferential direction of the compression coil spring, or the phase converters adjacent to each other along the longitudinal direction of the spring material when viewed from the spring compression direction are compressed. It can provide so that it may arrange | position on the opposite side alternately with respect to the centerline of a coil spring.

  According to the present invention, it is possible to suppress the influence of the distortion of the spring characteristics at each phase converter on the spring characteristics of the entire compression coil spring. In particular, when the plurality of phase converters are evenly distributed in the circumferential direction of the compression coil spring as viewed from the spring compression direction, the distortion of the spring characteristics at each phase converter is evenly distributed in the circumferential direction. The influence of the distortion of the spring characteristics at each phase converter on the spring characteristics of the entire compression coil spring can be minimized.

  According to the present invention, it is possible to provide a compression type coil spring in which a compression repulsion force acts evenly in the circumferential direction.

The perspective view which shows the compression type coil spring which concerns on 1st Embodiment. (A) and (b) are the side view and top view which show the compression type coil spring which concerns on 1st Embodiment, respectively. The partial enlarged view which expanded a part of side surface of the compression type coil spring which concerns on 1st Embodiment. The enlarged view which shows the side surface of the compression type coil spring which concerns on the modification 1. FIG. The enlarged view which shows the side surface of the compression type coil spring which concerns on the modification 2. FIG. (A) is the side view which shows the compression type coil spring which concerns on the modification 3, (b) is the top view which looked at the compression type coil spring which concerns on the modification 3 from the spring compression direction. (A) and (b) are the perspective views and top views which show the compression type coil spring which concerns on the modification 4, respectively. The elements on larger scale which show the surrounding side surface of the one variation in the compression type coil spring which concerns on the modification 5. FIG. The expanded view which developed the surrounding side surface of the other variation in the compression type coil spring concerning the modification 5 on the plane. FIG. 14 is a development view in which a peripheral side surface of still another variation in the compression type coil spring according to Modification 5 is developed on a plane. The side view which shows the side surface of the compression type coil spring which concerns on 2nd Embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a perspective view of a compression type coil spring 1 according to a first embodiment of the present invention, and FIGS. 2A and 2B are side views showing the compression type coil spring 1 according to the first embodiment. FIG. 3 is a partial enlarged view in which a part of the side surface of the compression type coil spring 1 according to the first embodiment is enlarged.

  The compression-type coil spring 1 can be used, for example, in a vehicle such as an automobile or a mechanical device. As shown in FIGS. 1, 2 (a) and 2 (b), a single strip-shaped spring material 3 is arranged in the width direction. A plurality of layers are wound in a coil shape (for example, a cylindrical shape), and a waveform H that is periodically continuous along the longitudinal direction of the spring material 3 and that swings in the thickness direction of the spring material 3 is formed. The spring material 3 is made of, for example, stainless steel or hard steel having spring properties.

  The waveform H is, for example, a cosine waveform or a sine waveform. In the case of a cosine waveform, a waveform from the convex top H1 to the next convex top H1 through the concave top H2 is defined as one period (ie, one wavelength), and is a sine waveform. In this case, the waveform from the concave top H2 through the convex top H1 to the next concave top H2 is one cycle. By forming a waveform H that is periodically continuous along the longitudinal direction of the spring material 3, convex top portions H <b> 1 and concave top portions H <b> 2 are alternately and repeatedly formed along the longitudinal direction of the spring material 3. .

A layer S is formed for one turn around which the spring material 3 is wound. The circumferential lengths of the layers S are the same as each other and are integral multiples of the wavelength of the waveform H (in this embodiment, three times the wavelength as an example).
Since the length in the circumferential direction of each layer S is an integral multiple of the wavelength of the waveform H, an integer number of waveforms H are formed in each layer S along the circumferential direction. That is, in each layer S, a plurality of convex top portions H1 are formed at regular intervals in the circumferential direction, and a plurality of concave top portions H2 are arranged at regular intervals in the circumferential direction so as to be disposed between the convex top portions H1. It is formed with.

  Furthermore, since the circumferential length of each layer S is an integral multiple of the wavelength of the waveform H, the convex tops H1 of each adjacent layer S and the concave shape are formed as long as the waveform H is not phase-shifted by the phase converter 5 described later. The top portions H2 come into contact with each other. That is, the adjacent layers S are in close contact with each other without a gap.

  Further, the compression coil spring 1 is composed of two or more adjacent layers S (four in this embodiment as an example), and the convex tops H1 of the waveform H and the concave tops H2 between the constituent layers S. A plurality of wound bundles T (four in this embodiment as an example) are in contact with each other. The number of turns of each of the plurality of winding bundles T (that is, the number of layers S constituting the same) is the same number of turns.

  As shown in FIG. 3, the adjacent winding bundle T is a winding of the uppermost layer Sa among the plurality of layers S constituting the lower winding bundle T among the adjacent winding bundles T. The end and the winding start end of the lowermost layer Sb among the plurality of layers S constituting the upper winding bundle T are connected.

  At the connection portion of the adjacent winding bundles T, there is a phase conversion unit 5 that phase-shifts the waveform H so that the convex top portions H1 and the concave top portions H2 of the waveform H are shifted between the adjacent winding bundles T. Is provided. That is, the phase converter 5 is provided at a connection portion between the winding end of the layer Sa and the winding start end of the layer Sb.

  By providing the phase conversion unit 5 in this way, the convex tops H1 and the concave tops H2 of the waveform H are shifted between adjacent winding bundles T. As a result, a gap necessary for compressing and deforming each winding bundle T independently is secured between adjacent winding bundles T.

  In this embodiment, each phase conversion unit 5 shifts the phase of the waveform H by a half wavelength so that the convex peak H1 and the concave peak H2 of the waveform H are brought into contact between adjacent winding bundles T. . That is, by providing the phase conversion unit 5 that shifts the phase of the waveform H by a half wavelength between the termination portion of the layer Sa and the winding start end of the layer Sb, the winding start end of the layer Sa (that is, the winding end of the layer Sa) Concave top H2 is continuous with convex top H1).

  Next, the manufacturing procedure of the compression type coil spring 1 will be described.

  First, the first wound bundle T1 is formed by winding the five layers S in a coil shape and forming the waveform H periodically along the longitudinal direction. Since the circumferential length of the five layers S is an integral multiple of the wavelength of the waveform H, the convex peaks H1 and the concave peaks H2 of the waveform H are in contact with each other between the five layers S. Further, the winding end of the fifth layer S is made to be the convex top H1.

  A phase conversion unit 5 that shifts the phase of the waveform H by a half wavelength is provided at the winding end of the fifth layer S of the winding bundle T1 (that is, the last convex top H1). A second winding bundle T2 is formed. More specifically, following the phase conversion unit 5, the spring material 3 is continuously wound in five layers S in a coil shape, the phase conversion unit 5 is used as a winding start end, and the winding start end is a concave top H <b> 2. Thus, by forming the waveform H periodically along the longitudinal direction of the spring material 3, the second winding bundle T2 is formed.

  When the winding bundle T2 is formed, the waveform H is changed between the fifth layer S of the winding bundle T1 and the first layer S of the winding bundle T2 due to the phase shift by the phase converter 5. The convex top H1 and the concave top H2 come into contact with each other. As a result, a gap is secured between the winding bundles T1 and T2 so that the winding bundles T1 and T2 can be independently compressed and deformed. Further, since the circumferential length of the five layers S of the wound bundle T2 is an integral multiple of the waveform H, the convex tops H1 of the waveform H and the five layers S of the wound bundle T2 The concave top portions H2 come into contact with each other.

  Note that the winding end of the fifth layer S of the winding bundle T2 originally ends at the concave top H2, but extends by a quarter wavelength and ends at the convex top H1. A phase conversion unit 5 that shifts the phase of the waveform H by a half wavelength is provided at the winding end of the fifth layer S of the winding bundle T2 (that is, the last convex top H1). A third winding bundle T3 is formed in the same manner as the second winding bundle T2. Similarly, a fourth winding bundle T4 is formed.

  As described above, according to this embodiment, a single strip-shaped spring material 3 is wound in a plurality of layers in a coil shape, and a waveform H that is periodically continuous along the longitudinal direction of the spring material 3 is formed. In the compression coil spring 1, the length of one turn of each layer S is equal to an integer multiple of the wavelength of the waveform H, and the spring material 3 is provided with a phase conversion unit 5 for phase shifting the waveform H.

  With this configuration, since the length of one round of each layer S is an integral multiple of the wavelength of the waveform H, the convex peaks H1 of the waveform H can be arranged at equal intervals in the circumferential direction in each layer S. It can be formed evenly in the circumferential direction. Thereby, the compression repulsion force of the compression type coil spring 1 can be made to act equally in the circumferential direction.

  Moreover, in order to provide the phase conversion part 5 in the spring material 3, between the two layers S connected by the phase conversion part 5, the convex top parts H1 and the concave top parts H2 of the waveform H can be shifted in the circumferential direction. it can. Thereby, with one spring material 3, the convex top part between the layer S where the convex top parts H1 of the waveform H and the concave top parts H2 are in contact with the adjacent layer S, and the adjacent layer S. The compression coil spring 1 can be formed so as to include the layer S in which the H1s and the concave tops H2 are displaced from each other. Thus, by comprising the compression type coil spring 1 with the one spring material 3, it becomes unnecessary to comprise a combination of several wave springs, and it can improve productivity and product precision.

  Further, since the phase conversion unit 5 shifts the phase of the waveform H by a half wavelength, the convex top H1 and the concave top H2 of the waveform H are brought into contact between the two layers S connected by the phase conversion unit 5. be able to. Thereby, when a compressive load is applied, it is possible to suppress the two layers S connected by the phase converter 5 from being relatively displaced in the circumferential direction, and to suppress the distortion of the spring constant of the compression coil spring due to the displacement. it can.

  Moreover, it is comprised by the two or more layers S which the spring material 3 adjoins, and the some winding which the convex top parts H1 of the waveform H and the concave top parts H2 contact between these two or more adjacent layers S Phase conversion in which the bundle T is provided, and the waveform H is phase-shifted at the connecting portion of the adjacent winding bundles T so that the convex peaks H1 and the concave peaks of the waveform H are shifted between the adjacent winding bundles T. Part 5 is provided.

  With this configuration, since the winding bundle T in which the convex tops H1 and the concave tops H2 of the waveform H contact each other between the layers S is provided, a sufficiently large spring constant can be obtained even if the compression coil spring 1 is downsized. Can be obtained.

  Further, by providing the phase conversion unit 5 at the connection portion of the adjacent winding bundles T, the waveform H is changed so that the convex top portions H1 and the concave top portions H2 of the waveform H are shifted between the adjacent winding bundles T. Due to the phase shift, each winding bundle T can function as a compression coil spring independent of each other. Thereby, it becomes easy to set the spring constant of the compression coil spring 1 to a desired value, and a sufficient amount of compression stroke can be ensured when a compression load is applied.

  Further, since the number of turns of each of the plurality of winding bundles T (that is, the number of each layer S constituting the same) is the same, the spring characteristics of each of the plurality of winding bundles T can be made the same. Thereby, the spring characteristic of the whole compression type coil spring can be made into a linear characteristic.

Next, a modification of the first embodiment will be described.
(Modification 1)
FIG. 4 is an enlarged view showing a side surface of the compression coil spring 1 according to the first modification.
In the first embodiment, the number of turns of each of the plurality of winding bundles T (that is, the number of constituent layers S) is the same as each other. However, in Modification 1, for example, as shown in FIG. The number of windings of at least one winding bundle T among the winding bundles T is different from the number of windings of other winding bundles T.

  In the specific example shown in FIG. 4, among the four winding bundles T, the number of windings of each of the two winding bundles T3 and T4 on the upper side (that is, the downstream side in the winding direction) is five, and the lower side (that is, The number of turns of each of the two winding bundles T1 and T2 on the upstream side in the winding direction is three. Since the spring constant of the winding bundle T is proportional to the number of turns of the winding bundle T, the spring constant of each of the two lower winding bundles T1, T2 is the same as that of the upper two winding bundles T3, T4. 3/5 times smaller than each spring constant.

  As described above, according to the first modification, the number of windings of at least one winding bundle T among the plurality of winding bundles T is different from the number of windings of other winding bundles T. Among them, the spring constant of at least one winding bundle T can be made different from the spring constant of other winding bundles T. Thereby, the spring characteristic of the whole compression type coil spring 1 can be made into a nonlinear characteristic.

(Modification 2)
FIG. 5 is an enlarged view showing a side surface of the compression coil spring 1 according to the second modification.
The compression type coil spring 1 according to the modified example 2 further includes a flat winding portion 10 between the winding bundles T in the first embodiment.

  The flat winding portion 10 is formed by winding the spring material 3 once in the width direction without forming the waveform H. The winding start end 10a of the flat winding portion 10 is connected to the winding end of the lower winding bundle T of adjacent winding bundles T (that is, the last convex top H1 of the winding bundle T). The winding end 10 b of the winding part 10 is connected to the winding start end of the upper winding bundle T of the adjacent winding bundles T. The flat winding portion 10 includes convex top portions H1 of the fifth (ie, last) layer S of the lower winding bundle T and concave top portions H2 of the first layer S of the upper winding bundle T. It is sandwiched between.

  In the second modification, the phase conversion unit 5 is provided at the winding end 10b of the flat winding unit 10, and the winding end of the lower winding bundle T of the adjacent winding bundles T (that is, the convex top H1). ) To shift the phase by a half wavelength, so that the winding start end of the upper winding bundle T is a concave top H2.

  As described above, according to the second modification, since the flat winding portion 10 is provided between adjacent winding bundles T, when a compression load is applied, one (for example, the lower side) winding between the adjacent winding bundles T is applied. The convex top H1 of the waveform H on the bundle T side can be prevented from shifting along the inclined portion of the waveform H on the other (for example, upper) winding bundle T side, and the change in spring characteristics due to the deviation can be suppressed.

  In Modification 2, the flat winding portion 10 is provided between all adjacent winding bundles T. However, the flat winding portion 10 may be provided between at least one adjacent winding bundle T.

  In the second modification, the flat wound portion 10 is formed by winding the spring material 3 once, but may be formed by winding a plurality of layers. In this case, the layers constituting the flat winding portion 10 may be in close contact with each other.

(Modification 3)
FIG. 6A is a side view showing the compression type coil spring 1 according to Modification Example 3, and FIG. 6B is a plan view of the compression type coil spring 1 according to Modification Example 3 as seen from the spring compression direction Y. FIG.

  For example, as shown in FIG. 6A, the compression coil spring 1 according to Modification 3 is different from Modification 2 in that the diameter of at least one winding bundle T among the plurality of winding bundles T is changed to other windings. This is different from the diameter of the bundle T. In the specific example shown in FIG. 6A, among the four winding bundles T, the upper two winding bundles T4 and T3 have the same diameter d2 and the lower two winding bundles T1. , T2 have the same diameter d1 and are larger than the diameters of the upper two winding bundles T.

  10A of flat winding parts provided between each winding bundle T2 and T3 from which each diameter differs among each flat winding part 10 are made to corrugate the spring material 3 to the width direction, as shown to Fig.6 (a) (b). A plurality of layers (for example, three layers) are wound without forming H, and the diameter gradually decreases in a spiral shape from d1 to d2 from the winding bundle T2 side to the winding bundle T3 side. Yes.

  More specifically, the maximum value of the diameter of the first layer U1 on the winding bundle T2 side in each layer U of the flat winding portion 10A is substantially the same value as the diameter of the winding bundle T1 (that is, the diameter d1). The minimum value of the diameter of the third layer U3 on the side of the wound bundle T3 is substantially the same as the diameter of the wound bundle T2 (ie, the diameter d2), and the diameter of the layer U2 between the layers U1 and U3 is It is formed smaller than the diameter of U1 (namely, diameter d1) and larger than the diameter of layer U3 (namely, diameter d2).

  Further, the outer peripheral edge of the layer U2 is in contact with the upper surface of the layer U1, and the outer peripheral edge of the layer U3 is in contact with the upper surface of the layer U2. This prevents the layer U2 from falling inside the layer U1, and prevents the layer U3 from falling inside the layer U2.

  The flat winding portion 10 other than the flat winding portion 10A is formed in the same manner as the flat winding portion 10 of the second modification.

  As described above, according to the third modification, the diameter of at least one winding bundle T among the plurality of winding bundles T is different from the diameter of the other winding bundle T, and therefore, at least one of the plurality of winding bundles T. The spring constant of one winding bundle T can be made different from the spring constant of the other winding bundle T. Thereby, the spring characteristic of the whole compression type coil spring 1 can be made into a nonlinear characteristic.

(Modification 4)
FIGS. 7A and 7B are a perspective view and a plan view, respectively, showing a compression type coil spring 1 according to Modification 4. FIG.
In the first embodiment, the compression coil spring 1 according to the modified example 4 includes at least one end portion 31 among the end portions 31 on both sides in the longitudinal direction of the spring material 3 (that is, the winding start end 31a and the winding end 31b). The compression type coil spring 1 is protruded inside. In the specific example shown in FIGS. 7A and 7B, the winding end 31 b of the spring material 3 protrudes so as to bend inward of the compression type coil spring 1.

  As described above, according to the fourth modification, at least one of the end portions 31 on both sides in the longitudinal direction of the spring material 3 is protruded to the inside of the compression type coil spring 1. When the end portion 31 protruding inside the compression type coil spring 1 is engaged with the side surface of the bolt, the compression type coil spring 1 can be temporarily fixed to the bolt. . Thereby, what inserted the volt | bolt inside the compression type coil spring can be handled as an integrated object, and the fastening to a predetermined fastening location can be performed easily.

(Modification 5)
FIG. 8 is a partially enlarged view showing a peripheral side surface of one variation of the compression type coil spring 1 according to the modification 5. FIG. 9 shows a peripheral side surface of another variation of the compression type coil spring 1 according to the modification 5. FIG. 10 is a development view showing a state in which the peripheral side surface of still another variation of the compression type coil spring 1 according to the modified example 5 is developed on a plane. In addition, the dashed-two dotted line A in FIG.9 and FIG.10 is a cutting line cut | disconnected in order to expand | deploy the surrounding side surface of the compression type coil spring 1 to a plane.

  In the first embodiment, the compression coil spring 1 according to the modified example 5 is provided with a plurality of phase converters 5 such that those adjacent to the longitudinal direction of the spring material 3 are not aligned in the spring compression direction Y. It is a thing.

Specifically, as shown in FIG. 8, the plurality of adjacent phase converters 5 (5 a, 5 b, 5 c) along the longitudinal direction of the spring material 3 are shifted in a zigzag manner along the spring compression direction Y ( That is, it can be provided along the spring compression direction Y so as to be alternately shifted to one side and the other side in the circumferential direction X.
Further, as shown in FIG. 9, when viewed from the spring compression direction Y, the plurality of phase converters 5 can be provided so as to be evenly distributed in the circumferential direction X of the compression coil spring 1.

  Further, as shown in FIG. 10, when viewed from the spring compression direction Y, the adjacent phase conversion portions 5 along the longitudinal direction of the spring material 3 are alternately placed on the opposite side with respect to the center line of the compression type coil spring 1. (In other words, the position of the adjacent three phase conversion units 5a, 5b, 5c in the circumferential direction X is based on the position of the first phase conversion unit 5a in the circumferential direction X (ie, 0 degrees). And the position of the second phase converter 5b in the circumferential direction X is 180 degrees, and the position of the third phase converter 5c in the circumferential direction X is 0 degrees).

  As described above, according to the modified example 5, the plurality of phase conversion units 5 are provided so that the adjacent ones in the longitudinal direction of the spring material 3 are not aligned in the spring compression direction Y. The influence of the distortion of the spring characteristics on the spring characteristics of the entire compression coil spring 1 can be suppressed.

  In particular, when the plurality of phase converters 5 are evenly distributed in the circumferential direction X of the compression coil spring 1 as viewed from the spring compression direction Y, the distortion of the spring characteristics in each phase converter 5 is the circumferential direction X. Therefore, the influence of the distortion of the spring characteristics at each phase converter 5 on the spring characteristics of the entire compression coil spring can be minimized.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. FIG. 11 is a side view showing a compression coil spring 1B according to the second embodiment.

  In the first embodiment, a plurality of winding bundles T are provided, and the phase conversion unit 5 that shifts the phase of the waveform H by a half wavelength is provided between the winding bundles T. In the second embodiment, the winding bundles are provided. Without providing T, there is provided a phase conversion unit 5 that shifts the phase of the waveform H by a half wavelength each time the spring material 3 is wound once. That is, between all adjacent layers S, the convex top H1 and the concave top H2 of the waveform H are in contact.

  As mentioned above, according to 2nd Embodiment, by providing the phase conversion part 5 between all the adjacent layers S, between the convex top parts H1 and the concave top parts H2 of the waveform H between all the adjacent layers S Even if the structure is shifted in the circumferential direction, similarly to the first embodiment, the compression repulsive force of the compression coil spring 1B can be applied evenly in the circumferential direction.

DESCRIPTION OF SYMBOLS 1,1B ... Compression type coil spring 3 ... Spring material 10 ... Flat winding part 31 ... End part 5 ... Phase conversion part H ... Waveform H1 ... Convex top part H2 ... Concave top part S ... Layer T ... Winding bundle

Claims (9)

In a compression type coil spring in which a single strip-shaped spring material is wound in a plurality of layers in a coil shape, and a waveform that is periodically continuous along the longitudinal direction of the spring material is formed.
The length of one round of each layer is equal to an integer multiple of the wavelength of the waveform,
A compression type coil spring in which the spring material is provided with a phase conversion section for phase shifting the waveform. The compression coil spring according to claim 1, wherein the phase conversion unit shifts the phase of the waveform by a half wavelength. It is composed of two or more adjacent layers of the spring material, and includes a plurality of winding bundles in which the corrugated convex ridges and the concave ridges contact each other between the two or more adjacent layers.
2. The phase conversion unit that phase-shifts the waveform so that the convex ridges and the concave ridges of the waveform are shifted between the adjacent winding bundles at a connection portion of the adjacent winding bundles. Or the compression type coil spring of Claim 2. The compression type coil spring according to claim 3, wherein the number of turns of each of the plurality of winding bundles is the same. 4. The compression coil spring according to claim 3, wherein among the plurality of winding bundles, the number of windings of at least one winding bundle is different from the number of windings of other winding bundles. Between the adjacent winding bundles, a flat winding portion where the corrugation is not formed is provided,
The compression according to one of claims 3 to 5, wherein, among the adjacent winding bundles, the other winding bundle is formed at the winding end of one winding bundle via the flat winding portion. Type coil spring. The compression type coil spring according to one of claims 1 to 6, wherein a diameter of at least one of the plurality of winding bundles is different from a diameter of another winding bundle. The compression type coil spring according to one of claims 1 to 7, wherein at least one end portion of both end portions in the longitudinal direction of the spring material protrudes inside the compression type coil spring. A plurality of the phase converters are provided along the longitudinal direction of the spring material, and adjacent ones along the longitudinal direction of the spring material are provided so as not to line up in a row in the spring compression direction. The compression type coil spring according to any one of claims 1 to 8.

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