JP6944292B2 - Spring assembly - Google Patents

Description

The present invention relates to a spring assembly that supports a plurality of coil springs.

Conventionally, a spring assembly composed of a plurality of coil springs erected on an annular plate material has been used, for example, as a spring for urging a piston incorporated in an automatic transmission of an automobile.

For example, a method for manufacturing a spring assembly in which a compression coil spring is assembled to each annular plate by crimping a protrusion formed on the two annular plates, which is composed of two annular plates and a compression coil spring. Is described. That is, each annular plate is formed with a cylindrical protrusion, the protrusion is inserted into the inner circumference of one end turn of the compression coil spring, and the end face of the end face of the end face is annular. After supporting with a plate, a punch is inserted from the inner circumference of the other end turns of the compression coil spring, and the tip of the protrusion is crimped and expanded by the punch to be locked to the compression coil spring. The compression coil spring is fixed to the plate in an annular shape.

Japanese Unexamined Patent Publication No. 2005-24003

However, in the case of the spring assembly of Patent Document 1, the protrusions are cylindrically formed by being crimped by a punch to expand the diameter. Therefore, when crimping by a punch, the protrusions can be sufficiently expanded. There was something I couldn't do. In this case, the amount of locking (wrapping allowance) of the protrusion with respect to the inner circumference of the spring is reduced, and the holding force of the spring may not be sufficient.

Therefore, an object of the present invention is to provide a spring assembly capable of securely holding the coil spring by sufficiently securing a locking amount of the locking portion with respect to the coil spring.

In order to achieve the above object, the present invention is a spring assembly in which a coil spring is supported by a spring support member, and the spring support member stands from a base portion that supports an end portion of the coil spring and a surface of the base portion. It has a spring support portion provided and arranged on the inner circumference of the coil spring, and the spring support portion is inclined with respect to the surface direction of the surface of the base portion and is provided on the inner circumference of the coil spring. A thin-walled portion having a locking portion to be locked and formed thinner than other portions of the spring support portion, or a notch portion formed by notching the spring support portion is partially provided. It is characterized by being.

According to the spring assembly of the present invention, the spring support portion is partially provided with a thin-walled portion or a notch portion, so that the locking portion can be easily expanded and the locking portion with respect to the inner circumference of the coil spring can be easily expanded. It is possible to secure a sufficient amount of locking (wrapping allowance) and firmly hold the coil spring.

It is an exploded perspective view which shows the 1st Embodiment of the spring assembly which concerns on this invention. It is an enlarged perspective view in the state before caulking the spring support part in the spring assembly. It is a perspective view of the spring assembly. (A) is a perspective view showing a state before crimping the spring support portion in the spring assembly, and (b) is an enlarged perspective view of a main part of the spring assembly in a state where the coil spring is removed. (A) is an enlarged perspective view of a main part of the spring assembly, and (b) is a plan view of the spring assembly. (A) is a cross-sectional view of FIG. 4 (a), and (b) is a cross-sectional view of FIG. 5 (a). A second embodiment of the spring assembly according to the present invention is shown, (a) is an enlarged perspective view of a main part thereof, and (b) is a cross-sectional view of (a). A third embodiment of the spring assembly according to the present invention is shown, (a) is an enlarged perspective view of a main part thereof, and (b) is a cross-sectional view of (a). A fourth embodiment of the spring assembly according to the present invention is shown, (a) is an enlarged perspective view of a main part thereof, and (b) is a cross-sectional view of (a). A fifth embodiment of the spring assembly according to the present invention is shown, (a) is an enlarged perspective view of a main part thereof, and (b) is a cross-sectional view of (a). A sixth embodiment of the spring assembly according to the present invention is shown, (a) is an enlarged perspective view of a main part thereof, and (b) is a cross-sectional view of (a).

Hereinafter, the first embodiment of the spring assembly according to the present invention will be described with reference to FIGS. 1 to 6.

As shown in FIG. 1, in the spring assembly 10, the coil spring 50 is supported by the spring support member 15. As shown in FIGS. 1 and 3, the spring assembly 10 in this embodiment has a pair of metal spring support members 15 and 15 arranged to face each other, and both ends of a plurality of coil springs 50. 53 and 53 are supported by a pair of spring support members 15 and 15, respectively.

The spring assembly 10 can be used, for example, as a piston return spring for urging a piston for hydraulic control incorporated in an automatic transmission of an automobile. And the installation location are not particularly limited. Further, only one spring support member 15 may be used.

Then, as shown in FIGS. 1, 2 and 4, the spring support member 15 is erected from the base portion 20 that supports the end portion 53 of the coil spring 50 and the surface 21 of the base portion 20, and is the inner circumference of the coil spring 50. It has a spring support portion 30 arranged in.

Further, in the spring assembly in the present invention, as shown in FIGS. 4 (b) and 6 (b), the spring support portion 30 is crimped, and the locking portion 33 (described later) is attached to the end portion 53 of the coil spring 50. The coil spring 50 is supported by the spring support member 15 by being locked to the inner circumference (see FIG. 5A). Note that FIGS. 4A and 6A show a state before the spring support portion 30 is crimped.

As shown in FIG. 1, the base 20 in this embodiment has an annular shape. However, the base portion does not have to be annular, for example, it may have an annular shape, a flat plate shape, or the like, as long as it can support the coil spring 50.

Further, a plurality of spring support portions 30 are provided at equal intervals in the circumferential direction of the base portion 20. As shown in FIG. 4, the spring support portion 30 of this embodiment has a substantially cylindrical shape that is erected from the peripheral edge of the surface 21 of the circular through hole 23 formed in the base portion 20.

The spring support portion may be erected from the surface 21 of the base portion 20 without being erected from the peripheral edge of the through hole 23 formed in the base portion 20. Further, the spring support portion may have, for example, a substantially elliptical cylinder shape, a substantially square cylinder shape, or the like, and may be formed of a plurality of divided walls instead of a cylinder shape continuous in the circumferential direction. There is no particular limitation.

Then, as shown in FIG. 6B, the spring support portion 30 is inclined with respect to the plane perpendicular direction M (direction perpendicular to the plane direction of the surface 21) of the surface 21 of the base portion 20 to be a coil spring. A locking portion 33 that locks to the inner circumference of the 50 is provided, and a thin-walled portion 37 that is formed thinner than other portions of the spring support portion 30 is partially provided.

The spring support portion in the present invention may be configured such that a notch portion formed by notching the spring support portion is partially provided (in this case, the spring support portion may have a plurality of notches, as described above. It consists of divided walls), and is not particularly limited. Further, the "surface of the base portion" in the present invention means a surface capable of supporting the end portion 53 of the coil spring 50.

The spring support portion 30 in this embodiment is a circular wall-shaped erecting portion 31 erected from the peripheral edge of the through hole 23 of the base portion 20 on the surface 21 side along the plane perpendicular direction M, and the erecting portion 31. It has a locking portion 33 that extends from the tip toward the outer diameter of the spring support portion 30 and is inclined with respect to the surface perpendicular direction M of the surface 21 so as to be away from the surface 21 of the base portion 20. (See FIGS. 4 (b) and 6 (b)).

However, the standing portion 31 may not be provided, and the locking portion 33 may extend directly from the surface 21 of the base portion 20. Further, the upright portion 31 may be inclined with respect to the plane perpendicular direction M of the surface 21, but it is preferable that the upright portion 31 has an inclination angle different from that of the locking portion 33.

As shown in FIGS. 4A and 6A, the locking portion 33 does not tilt with respect to the surface perpendicular direction M of the surface 21 before the spring support portion 30 is crimped. The shape extends from the tip of the upright portion 31 along the plane perpendicular direction M of the surface 21 of the base portion 20.

Further, the spring support portion 30 is provided with a bent portion 35 that bends toward the inner peripheral side of the spring support portion 30 with respect to the locking portion 33. As shown in FIGS. 4 (b) and 6 (b), the bent portion 35 of this embodiment has a predetermined length from the tip of the locking portion 33 along the plane perpendicular direction M of the surface 21 of the base portion 20. The tip portion 35a of the tip portion 35a is bent in the direction of the inner diameter of the spring support portion 30. In the bent portion of the present invention, "bending toward the inner peripheral side of the spring support portion with respect to the locking portion" means that the locking portion 33 is tilted as shown by arrow K2 in FIG. 6 (b). It means that the spring support portion 30 is bent toward the inner peripheral side with respect to the direction K1.

Further, as shown in FIG. 6A, in the state before the spring support portion 30 is crimped, the entire bent portion 35 including the tip portion 35a is bent in the inner diameter direction of the spring support portion 30. Moreover, the inner diameter of the tip portion 35a of the bent portion 35 is formed to be smaller than the outer diameter of the punch 60 for caulking.

Further, the thin-walled portion 37 is formed of a recess 39 extending in the axial direction of the spring support portion 30. In this embodiment, as shown in FIGS. 4 (b) and 6 (b), a plurality of recesses 39 (three in this case) are spaced around the outer circumference of the spring support portion 30 at equal intervals in the circumferential direction. Is formed so as to extend in the axial direction of the spring support portion 30, and the recess 39 partially provides the spring support portion 30 with a thin portion 37 thinner than other portions of the spring support portion 30. ..

Further, as shown in FIG. 5A, the recess 39 is provided at a position of the spring support portion 30 where the coil spring 50 is separated from the surface 21 of the base portion 20 and exceeds the locking portion 33. That is, as shown in FIG. 5A, one end 53 of the coil spring 50 is in contact with and supported by the surface 21 of the base 20, but the coil spring 50 is directed toward the other end 53. As it is wound, a predetermined recess 39 is arranged at a position where the coil spring 50 is separated from the surface of the base 20 and exceeds the locking portion 33, gradually separated from the surface 21 of the base 20.

In this embodiment, the plurality of recesses 39 have a linear groove shape having the same width along the circumferential direction of the spring support portion 30 and extending with the same length, but are predetermined recesses. The width and length of the recess may be changed from the width and length of other recesses, and the shape of the recess may be narrowed or widened toward the surface side of the spring support portion. .. Further, although three recesses 39 of this embodiment are formed on the outer periphery of the spring support portion 30 at equal intervals, four or more recesses may be formed. As described above, the number, shape, arrangement, etc. of the recesses are not particularly limited.

Further, as shown in FIG. 6B, the thin-walled portion 37 is provided at a position of the spring support portion 30 at a predetermined height away from the surface 21 of the base portion 20. Further, the recess 39 extends from a position of the spring support portion 30 at a predetermined height away from the surface 21 of the base portion 20 toward the axial tip of the spring support portion 30 (FIG. 7, which will be described later). Those reaching the surface 21 of the base 20, such as the recess 39A described below, are excluded). Further, the recess 39 of this embodiment extends to the tip of the spring support portion 30 in the axial direction. More specifically, the recess 39 in this embodiment extends from a position beyond the tip of the upright portion 31 on the outer circumference of the spring support portion 30, and extends from the tip of the locking portion 33 and the bent portion 35. It extends to 35a, and as a result, the thin portion 37 is formed over the locking portion 33 and the bent portion 35.

As described above, the recess 39 of this embodiment extends in the axial direction on the outer circumference of the spring support portion 30, but the recess may be provided on the inner circumference of the spring support portion (as described above). It may extend in the circumferential direction of the spring support portion (described in the sixth embodiment shown in FIG. 11) (described in the fourth embodiment shown in FIG. 9 and the fifth embodiment shown in FIG. 10).

The coil spring 50 can be assembled to the spring support member 15 as follows, for example.

First, as shown in FIGS. 2 and 6A, the spring support portion 30 is inserted into the inner circumference of one end 53 of the coil spring 50, and the one end 53 is supported by the surface 21 of the base 20. .. At this time, one end 53 of the coil spring 50 is provided with a countersunk portion that is in contact with the base portion 20 and a portion that rises away from the base portion 20.

Then, through the inside of the coil spring 50, the punch 60 having an outer diameter larger than the inner diameter of the tip portion 35a of the bent portion 35 of the spring support portion 30 and having a tapered tip and being formed smaller than the inner diameter is supported by the spring. It is inserted into the inner circumference of the spring support portion 30 from the tip portion 35a side of the portion 30 (see FIG. 6A). As a result, the tip portion 35a of the bent portion 35 is expanded so as to expand toward the outer diameter side, and the locking portion 33 is crimped so as to be pressed against the upper portion of the end winding portion via the bent portion 35, and the coil spring 50 is used. Since it is locked to the inner circumference of the end turn portion of the coil spring 50, one end 53 of the coil spring 50 can be fixed to the spring support portion 30.

By repeating this for each coil spring 50 and also for the other end 53 of each coil spring 50, as shown in FIG. 3, a plurality of coil springs 50 are attached to the pair of spring support members 15 and 15. The spring assembly 10 can be manufactured.

Next, the action and effect of the spring assembly 10 having the above configuration will be described.

That is, in the spring assembly 10, the spring support portion 30 is arranged on the inner circumference of the end portion 53 of the coil spring 50, and the spring support portion 30 is crimped while the end portion 53 of the coil spring 50 is supported by the base portion 20. When the locking portion 33 is locked to the inner circumference of the coil spring 50, a thin portion 37 is partially provided on the spring support portion 30 as shown in FIGS. 4 (b) and 6 (b). Therefore, the locking portion 33 can be easily expanded (see FIG. 5B), and a sufficient locking amount (wrapping margin) of the locking portion 33 with respect to the inner circumference of the coil spring 50 is secured. The coil spring 50 can be firmly held.

Further, in this embodiment, the spring support portion 30 is partially provided with a thin-walled portion 37, and the thin-walled portion 37 is composed of a recess 39 extending in the axial direction of the spring support portion 30, so that the spring support portion 30 When the locking portion 33 is locked to the inner circumference of the coil spring 50 by caulking, the portion of the spring support portion 30 between the plurality of recesses 39 can be easily expanded, and the locking portion 33 can be easily expanded. , The inner circumference of the coil spring 50 can be locked while being reliably overlapped, and the holding force of the coil spring 50 can be further increased.

In this embodiment, three recesses 39 are provided on the outer periphery of the spring support portion 30 at equal intervals in the circumferential direction so as to extend in the axial direction. Therefore, the spring support portion 30 is crimped and locked. When the portion 33 is locked to the inner circumference of the coil spring 50, as shown in FIG. 5B, the locking portion 33 can be expanded with a substantially uniform wall thickness so as to form a substantially triangular shape. The locking portion 33 can be locked evenly on the inner circumference of the coil spring 50 in a well-balanced manner.

Further, as shown in FIGS. 4 (b) and 6 (b), in this embodiment, the recess 39 forming the thin-walled portion 37 is separated from the surface 21 of the base 20 of the spring support portion 30 by a predetermined height. Since it is provided from the position toward the tip of the spring support portion 30 in the axial direction, the inside of the coil spring 50 is formed when the spring support portion 30 is crimped to lock the locking portion 33 to the inner circumference of the coil spring 50. The contact angle θ of the locking portion 33 with respect to the circumference (here, the angle formed by the tilting direction K1 of the locking portion 33 with respect to the plane perpendicular direction M of the surface 21 of the base portion 20; the same applies to the embodiment described later) should be large. This makes it possible to further increase the holding force of the coil spring 50 and suppress the inclination of the coil spring 50.

Further, as shown in FIGS. 4 (b) and 6 (b), in this embodiment, the recess 39 extends to the axial tip of the spring support portion 30, and further extends to the spring support portion 30. Is provided with a bent portion 35 that bends toward the inner peripheral side of the spring support portion 30 with respect to the locking portion 33. Therefore, as shown in FIG. 6A, even if the outer diameter of the punch 60 is smaller than the inner diameter of the spring support portion 30 on the base side, the tip of the bent portion 35 of the spring support portion 30 is inclined inward. As a result, the spring support portion 30 can be crimped so as to expand toward the outer diameter side. Thereby, when one end of the coil spring 50 is fixed to one base portion 20 and then the other end of the coil spring 50 is fixed to the other base portion 20, the punch 60 having the same outer diameter can be used.

Further, as shown in FIG. 5A, in this embodiment, the recess 39 is provided at a position of the spring support portion 30 where the coil spring 50 is separated from the surface 21 of the base portion 20 and exceeds the locking portion 33. Therefore, when the spring support portion 30 is crimped to expand the locking portion 33, the caulking force is less likely to act at a position where the coil spring 50 is separated from the surface 21 of the base portion 20 and exceeds the locking portion 33, and the coil spring 50 Can be prevented from tilting due to the caulking force.

FIG. 7 shows a second embodiment of the spring assembly according to the present invention. The same parts as those of the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The spring assembly 10A in the second embodiment has a recessed structure different from that in the first embodiment. That is, as shown in FIGS. 7A and 7B, in the spring support portion 30A in the second embodiment, the recess 39A provided on the outer periphery thereof is erected from the axial tip of the spring support portion 30A. It is provided beyond the portion 31 to the surface 21 of the base portion 20, and the recess 39A forms a structure in which the thin-walled portion 37 is partially provided in the spring support portion 30A. Also in this second embodiment, the same effect as that of the first embodiment can be obtained.

FIG. 8 shows a third embodiment of the spring assembly according to the present invention. The same parts as those of the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The structure of the recess of the spring assembly 10B in the third embodiment is different from that in the first and second embodiments. That is, as shown in FIGS. 8A and 8B, the spring support portion 30B in the third embodiment is formed on the bottom surface of the recess 39B provided on the outer periphery thereof (the surface on the inner diameter side of the spring support portion 30). A plurality of step portions 40 and 41 are provided along the axial direction of the spring support portion 30B, and the recess 39B forms a structure in which the thin-walled portion 37 is partially provided in the spring support portion 30B. In this third embodiment, in addition to obtaining the same effects as those in the first embodiment, the thickness of the recess 39B is changed by the plurality of steps so that the thickness of the recess 39B becomes thinner toward the upper side. When crimped, the coil spring 50 is bent so as to expand to an outer diameter toward the upper side, and the contact angle θ of the locking portion 33 with respect to the inner circumference of the end turn portion of the coil spring 50 can be made larger.

FIG. 9 shows a fourth embodiment of the spring assembly according to the present invention. The same parts as those of the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The spring assembly 10C in the fourth embodiment has a recessed structure different from that in the first to third embodiments. That is, as shown in FIGS. 9A and 9B, the spring support portion 30C in the fourth embodiment is the outer circumference of the spring support portion 30C, and is between the upright portion 31 and the locking portion 33. In addition, an annular recess 39C is formed along the circumferential direction of the spring support portion 30C, and the recess 39C forms a structure in which the spring support portion 30C is partially provided with a thin portion 37. .. Further, the recess 39C is provided at a position of the spring support portion 30C at a predetermined height away from the surface 21 of the base portion 20.

In the fourth embodiment, in addition to obtaining the same effects as those in the first embodiment, the spring support portion 30C is partially provided with a thin-walled portion 37, and the thin-walled portion 37 is provided with the thin-walled portion 37. Since it is composed of a recess 39C extending in the circumferential direction of the spring support portion 30C, when the spring support portion 30C is crimped to lock the locking portion 33 to the inner circumference of the coil spring 50, the locking portion 33 is clamped via the recess 39C. It can be easily expanded, the contact angle θ of the locking portion 33 with respect to the inner circumference of the coil spring 50 can be made large, and the holding force of the coil spring 50 can be further increased.

FIG. 10 shows a fifth embodiment of the spring assembly according to the present invention. The same parts as those of the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The spring assembly 10D in the fifth embodiment has a recessed structure different from that in the first to fourth embodiments. That is, as shown in FIGS. 10A and 10B, the spring support portion 30D in the fifth embodiment is the outer circumference of the spring support portion 30D, and is a bent portion 35 from the tip end side of the upright portion 31. An annular recess 39D extends along the circumferential direction of the spring support portion 30 in a range extending to the tip portion 35a of the spring support portion 35a, and the recess 39D partially provides a thin portion 37 in the spring support portion 30D. It has a structure. In the fifth embodiment, the same effects as those in the first and fourth embodiments can be obtained.

FIG. 11 shows a sixth embodiment of the spring assembly according to the present invention. The same parts as those of the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The spring assembly 10E in the sixth embodiment has a recessed structure different from that in the first to fifth embodiments. That is, as shown in FIGS. 11A and 11B, the spring support portion 30E in the sixth embodiment has a plurality of recesses on the inner circumference of the spring support portion 30E at equal intervals in the circumferential direction. 39E (three in this case) are formed so as to extend in the axial direction of the spring support portion 30E, and the recess 39E forms a structure in which the spring support portion 30E is partially provided with the thin portion 37. Also in this sixth embodiment, the same effect as that of the first embodiment can be obtained.

The present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the gist of the present invention, and such embodiments are also included in the scope of the present invention. ..

10, 10A, 10B, 10C, 10D, 10E Spring assembly 15 Spring support member 20 Base 21 Surface 30, 30A, 30B, 30C, 30D, 30E Spring support 33 Locking part 35 Bending part 37 Thin part 39, 39A, 39B, 39C, 39D, 39E Recess 50 Coil spring

Claims (6)

A spring assembly in which a coil spring is supported by a spring support member.
The spring support member is made of metal and has a base portion that supports the end portion of the coil spring and a spring support portion that stands upright from the surface of the base portion and is arranged on the inner circumference of the coil spring. Ori,
The spring support portion has a locking portion, and the locking portion is expanded by caulking the spring supporting portion in a state where the end portion of the coil spring is supported by the base portion, and the base portion is expanded. It is inclined with respect to the surface direction of the surface of the coil spring and is locked to the inner circumference of the coil spring.
Further, the spring support portion is characterized in that a thin-walled portion formed thinner than other portions of the spring support portion or a notch portion formed by notching the spring support portion is partially provided. Spring assembly to do. The spring assembly according to claim 1, wherein the spring support portion is partially provided with the thin-walled portion, and the thin-walled portion comprises a recess extending in the axial direction of the spring support portion. The spring assembly according to claim 2, wherein the recess is provided from a position of the spring support portion at a predetermined height away from the surface of the base portion toward the tip end side of the spring support portion in the axial direction. A spring assembly in which a coil spring is supported by a spring support member.
The spring support member has a base portion that supports the end portion of the coil spring, and a spring support portion that stands upright from the surface of the base portion and is arranged on the inner circumference of the coil spring.
The spring support portion has a locking portion that is inclined with respect to the surface direction of the surface of the base portion and is locked to the inner circumference of the coil spring, and is more than any other portion of the spring support portion. A thinly formed thin-walled portion or a notch portion formed by notching the spring support portion is partially provided.
The thin-walled portion is partially provided in the spring support portion, and the thin-walled portion includes a recess extending in the axial direction of the spring support portion.
The recess extends to the axial tip of the spring support.
Further, the spring assembly is characterized in that the spring support portion is provided with a bent portion that bends toward the inner peripheral side of the spring support portion with respect to the locking portion. The spring assembly according to any one of claims 2 to 4, wherein the recess is provided at a position of the spring support portion where the coil spring is separated from the surface of the base portion and exceeds the locking portion. The spring assembly according to claim 1, wherein the spring support portion is partially provided with the thin-walled portion, and the thin-walled portion comprises a recess extending in the circumferential direction of the spring support portion.

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