WO2021044978A1 - ばね組立体およびそのばね組立体の製造方法 - Google Patents

ばね組立体およびそのばね組立体の製造方法 Download PDF

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Publication number
WO2021044978A1
WO2021044978A1 PCT/JP2020/032680 JP2020032680W WO2021044978A1 WO 2021044978 A1 WO2021044978 A1 WO 2021044978A1 JP 2020032680 W JP2020032680 W JP 2020032680W WO 2021044978 A1 WO2021044978 A1 WO 2021044978A1
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WO
WIPO (PCT)
Prior art keywords
plate
wall portion
spring
spring assembly
pillar
Prior art date
Application number
PCT/JP2020/032680
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
泰崇 植松
Original Assignee
株式会社パイオラックス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社パイオラックス filed Critical 株式会社パイオラックス
Priority to JP2021543741A priority Critical patent/JP7102622B2/ja
Publication of WO2021044978A1 publication Critical patent/WO2021044978A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/12—Attachments or mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F16F3/02—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction
    • F16F3/04—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction composed only of wound springs

Definitions

  • the present invention relates to a spring assembly that holds a plurality of springs and a method for manufacturing the spring assembly.
  • Patent Document 1 discloses a spring assembly in which a plurality of coil springs are arranged on a substrate in a vertical posture.
  • the substrate of this spring assembly has a spring receiving portion formed to support the end portion of the coil spring, and the spring receiving portion is projected by embossing and then a large-diameter punch is opposed to the projecting direction. By pressing in the direction, the peripheral edge of the protrusion is crushed and the end of the coil spring is fixed.
  • the end portion of the coil spring in the process of crushing the peripheral edge of the spring receiving portion, the end portion of the coil spring may be deformed so as to increase the diameter, and the coil spring may be tilted with respect to the vertical direction of the substrate.
  • An object of the present invention is to provide a technique for suppressing deformation of a countersunk portion in a spring assembly in which a countersunk portion of a spring is attached to a plate made of a metal material.
  • a spring assembly includes a plurality of springs and a plate formed of a metal material and supporting a countersunk portion of the plurality of springs.
  • the plate has a pillar portion that protrudes from the surface of the plate and is wound around the end turn portion, and a wall portion that stands upright from the end surface of the pillar portion. The wall portion is bent outward in the radial direction to support the end turn portion.
  • the spring assembly comprises a plurality of springs and a plate made of a metal material and supporting the end turns of the plurality of springs.
  • the plate has a recess that is recessed from the surface of the plate and into which a countersunk portion is inserted, and a wall portion that stands upright from the surface at the periphery of the recess. The wall portion is bent inward in the radial direction to support the end turn portion.
  • Yet another aspect of the present invention is a method of manufacturing a spring assembly comprising a plurality of springs and a plate formed of a metal material to support the end turns of the plurality of springs.
  • This method includes a step of forming a pillar portion protruding from the surface of the plate and a wall portion erected from the end face of the pillar portion, a step of placing the end turn portion on the surface around the pillar portion, and a processing tool. It includes a step of pushing the wall portion from the inside of the wall portion toward the pillar portion to bend the wall portion radially outward. In the step of bending the wall portion, the wall portion is bent so that the processing tool does not hit the pillar portion at least at the initial stage of pushing.
  • FIG. 5A is a cross-sectional view of the support structure of the second modification
  • FIG. 5B is a cross-sectional view of the support structure of the third modification. It is a figure for demonstrating the support structure of the 4th modification.
  • FIG. 1 is a partial cross-sectional view of the spring assembly 10 of the embodiment.
  • the spring assembly 10 includes a plate 20 and a plurality of springs 22 supported by the plate 20.
  • FIG. 1 shows an enlarged support portion of the spring 22 in the spring assembly 10, and in reality, a plurality of springs 22 are supported in parallel with the plate 20. Further, a pair of plates 20 may be provided so as to support both ends of the spring 22.
  • the spring assembly 10 is provided in the clutch mechanism of the transmission of the vehicle, functions as an elastic body for returning the position of the piston, and is provided on the outer circumference or the inner circumference of the pipe member.
  • the spring assembly 10 can be expanded and contracted in the axial direction of the spring 22 to urge the piston.
  • the axial direction of the spring 22 is simply referred to as the axial direction.
  • the plate 20 is made of a metal material and is formed in a plate shape to support the end-winding portions 22a of the plurality of springs 22.
  • the plate 20 is formed in an annular shape, but the plate 20 is not limited to the annular shape and may be formed in a rectangular shape. In any case, the plate 20 supports a plurality of springs 22.
  • the plate 20 has a plurality of spring support structures 32 formed by the pillar portion 24, the wall portion 26, and the recess portion 28.
  • the pillar portion 24 protrudes from the surface 30 of the plate 20 and is formed in a columnar shape.
  • the wall portion 26 is erected from the peripheral edge of the upper end surface of the pillar portion 24, is formed in a cylindrical shape, and is processed so as to bend outward in the radial direction. Since the pillar portion 24 is provided so as to have a higher rigidity than the wall portion 26, it is difficult to be deformed when the wall portion 26 is bent, and the diameter expansion of the end turn portion 22a of the spring 22 is suppressed.
  • the wall portion 26 may be formed so that the plate thickness becomes thinner toward the tip, and may be formed so that the plate thickness becomes uniform toward the tip.
  • the recessed portion 28 is formed on the back side of the pillar portion 24 and the wall portion 26, and is located at the bottom of the pillar portion 24.
  • the recessed portion 28 forms a columnar recessed space.
  • the axial height of the recess 28 is smaller than the plate thickness of the plate 20, and the diameter of the recess 28 is larger than the diameter of the column 24.
  • the recessed portion 28 is formed by a half punching process when the pillar portion 24 and the wall portion 26 are projected toward the surface 30 side.
  • the pillar portion 24 is supported by the base portion 34 of the main body of the plate 20.
  • the spring 22 is a coil spring, and a plurality of springs 22 are side by side and are supported by the support structure 32.
  • the coil diameter of the end turn portion 22a of the spring 22 is formed to be smaller than the coil diameter other than the end winding portion 22a.
  • the end turn portion 22a is located on the radial outer side of the pillar portion 24 so as to wind around the pillar portion 24, and is supported by the wall portion 26 bent outward in the radial direction so as not to come off from the outer periphery of the pillar portion 24.
  • FIG. 2 is a diagram for explaining a manufacturing process of the spring assembly 10.
  • the pillar portion 24, the wall portion 26, and the recessed portion 28 shown in FIG. 2A are formed on the flat plate 20 by press working. By pressing from the back side of the plate 20 by the method of half punching, the recessed portion 28 is formed, and the pillar portion 24 and the wall portion 26 are formed so as to protrude from the surface 30.
  • the base portion 34 can be secured by making the axial height h1 of the recessed portion 28 smaller than the plate thickness T of the plate 20.
  • the axial height h1 of the recess 28 may be set to 1/2 or less at 1/3 or more of the plate thickness T of the plate 20.
  • the axial height h2 of the wall portion 26 is set based on the wire diameter d of the spring 22, and is set, for example, in the range of 0.5d to 1.5d. Further, the axial height h3 of the pillar portion 24 is set based on the wire diameter d of the spring 22, and is set, for example, in the range of 0.2d to 1.0d. As a result, the wall portion 26 prevents the end winding portion 22a from coming off, and the pillar portion 24 can suppress the diameter expansion of the end winding portion 22a.
  • the spring 22 is extrapolated from the pillar portion 24 and the wall portion 26, and the end turn portion 22a is placed on the surface 30 of the plate 20 around the pillar portion 24, and the pillar portion is formed. It is provided so as to wind around the outer circumference of the 24.
  • the outer diameter of the pillar portion 24 and the inner diameter of the end turn portion 22a may be substantially the same.
  • the wall portion 26 is bent by the columnar processing tool 36.
  • the tip of the processing tool 36 has a tapered pressing surface 36a.
  • the processing tool 36 moves forward and backward in the axial direction by a drive source such as a motor.
  • the processing tool 36 advances toward the plate 20 with respect to the plate 20 placed on the processing table, is inserted inside the spring 22, and the pressing surface 36a is the inner peripheral edge of the wall portion 26 before bending. Contact.
  • FIG. 3 is a diagram for explaining the manufacturing process of the spring assembly 10, and shows the continuation of the manufacturing process shown in FIG. 2 (b).
  • FIG. 3 shows a step of bending the wall portion 26 outward in the radial direction using the processing tool 36, and shows a step after arranging the spring 22 shown in FIG. 2 (b).
  • the processing tool 36 is pushed toward the pillar portion 24, and the pressing surface 36a bends the wall portion 26 outward in the radial direction.
  • the processing tool 36 advances by a preset distance.
  • the spring 22 is supported so that the wall portion 26 prevents the end winding portion 22a from coming off.
  • the pillar portion 24 is provided so as to have higher rigidity than the wall portion 26, it is difficult to be deformed. Can be suppressed from expanding in diameter.
  • the pillar portion 24 it is possible to prevent the end turn portion 22a from being partially expanded in diameter due to the attachment by the wall portion 26, and to prevent the spring 22 from being attached in a tilted state. it can.
  • the wall portion 26 is bent so that the processing tool 36 does not hit the upper end surface 24a of the pillar portion 24 at least at the initial stage of pushing.
  • the pushing distance of the processing tool 36 may be a distance that finally hits the upper end surface 24a of the pillar portion 24, but it is preferable that the pushing distance is set so as not to directly press the pillar portion 24, and the pushing distance is close to the upper end surface 24a at zero distance. It may be set to push it to the desired position. Further, the processing tool 36 may be set so as not to hit the upper end surface 24a of the column portion 24 by pushing. As a result, the pillar portion 24 can be less likely to be deformed in the step of bending the wall portion 26.
  • the step of bending the wall portion 26 may be simultaneously executed by using the plurality of processing tools 36 on the plurality of support structures 32, or may be executed one by one on the plurality of support structures 32.
  • FIG. 4 is a diagram for explaining the support structure 132 of the first modification.
  • FIG. 4A is a perspective view of the support structure 132
  • FIG. 4B is a perspective sectional view of the support structure 132.
  • the support structure 132 shown in FIG. 4A has the same shape of the pillar portion 24 and the recessed portion 28 as the support structure 32 shown in FIG. 2A, but the shape of the wall portion 126 is different.
  • a plurality of wall portions 126 are formed along the peripheral edge of the pillar portion 24, and are arranged apart from each other in the circumferential direction.
  • the wall portion 126 has a shape in which a slit is provided in the cylindrical wall portion 26 shown in FIG. 2A, and is formed in a substantially cylindrical shape as a whole. By separating the wall portion 126 in the circumferential direction in this way, the wall portion 126 can be easily bent.
  • FIG. 5A is a cross-sectional view of the support structure 232 of the second modification
  • FIG. 5B is a cross-sectional view of the support structure 332 of the third modification.
  • the support structure 232 shown in FIG. 5 (a) has a different shape of the pillar portion 224 and the recessed portion 228 as compared with the support structure 32 shown in FIG. 2 (a), and the support structure 332 shown in FIG. 5 (b) has a support structure 332.
  • the thickness of the wall portion 326 and the shape of the recessed portion 328 are different.
  • the pillar portion 224 is formed so that the front surface 224a and the back surface are recessed toward the center.
  • the back surface of the pillar portion 224 is the upper surface of the recess portion 228.
  • the recessed portion 228 is formed in a substantially conical shape.
  • the pillar portion 224 and the wall portion 26 that are projected by the half punching process can be raised by the amount that the center is thinned, and the axial heights of the pillar portion 224 and the wall portion 26 from the surface 30 of the plate 20 can be increased by the plate 20. It is possible to make it larger than the plate thickness of.
  • the recessed portion 328 shown in FIG. 5B is formed so that the upper surface protrudes toward the center and the peripheral edge side is recessed from the center.
  • the diameter of the recessed portion 328 is smaller than the outer diameter of the wall portion 326 and larger than the inner diameter of the wall portion 326.
  • the recessed portion 328 is formed by being recessed to the same extent as the plate thickness of the plate 20.
  • the wall portion 326 is formed to be thicker than the wall portion 26 shown in FIG. 2 (a).
  • FIG. 6 is a diagram for explaining the support structure 432 of the fourth modification.
  • FIG. 6A shows a state before the wall portion 426 is bent
  • FIG. 6B shows a state in which the wall portion 426 is bent.
  • the support structure 432 shown in FIG. 6B is different from the support structure 32 shown in FIG. 1 in that the spring 422 is supported from the outside in the radial direction.
  • the support structure 432 is composed of a wall portion 426 and a recess 38.
  • the wall portion 426 is formed so as to stand upright from the surface 30 of the plate 20 at the peripheral edge of the recess 38.
  • the recess 38 is formed inside the wall portion 426 and is recessed from the surface 30 of the plate 20.
  • the wall portion 426 is a portion protruding from the surface 30, the recess 38 is a portion recessed from the surface 30, and the wall portion 426 and the recess 38 form a columnar recessed space.
  • FIG. 6A shows a state in which the end turn portion 422a of the spring 422 is inserted into the recess 38 after the wall portion 426 and the recess 38 are formed on the plate 20.
  • the coil diameter of the countersunk portion 422a is larger than the coil diameter of the portion of the spring 422 other than the countersunk portion 422a.
  • the wall portion 426 After inserting the countersunk portion 422a into the recess 38, the wall portion 426 is bent inward in the radial direction as shown in FIG. 6B to support the countersunk portion 422a.
  • the recess 38 recessed from the surface 30 of the plate 20 is less likely to be deformed, so that the diameter reduction of the end turn portion 422a is suppressed and the spring 422 is prevented from falling.
  • the winding portion 22a of the spring 22 is formed to be smaller than the coil diameter other than the end winding portion 22a, but the present invention is not limited to this embodiment, and the coil diameters of the spring 22 are all uniformly formed. May be good.
  • a spring assembly may be formed with both ends of the spring 422 attached to the two plates 20 and the spring 422 sandwiched between the two plates 20.
  • the present invention relates to a spring assembly that holds a plurality of springs and a method for manufacturing the spring assembly.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
PCT/JP2020/032680 2019-09-04 2020-08-28 ばね組立体およびそのばね組立体の製造方法 WO2021044978A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021543741A JP7102622B2 (ja) 2019-09-04 2020-08-28 ばね組立体

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019161259 2019-09-04
JP2019-161259 2019-09-04

Publications (1)

Publication Number Publication Date
WO2021044978A1 true WO2021044978A1 (ja) 2021-03-11

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PCT/JP2020/032680 WO2021044978A1 (ja) 2019-09-04 2020-08-28 ばね組立体およびそのばね組立体の製造方法

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JP (1) JP7102622B2 (enrdf_load_stackoverflow)
WO (1) WO2021044978A1 (enrdf_load_stackoverflow)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61206128U (enrdf_load_stackoverflow) * 1985-06-14 1986-12-26
JPH0669446U (ja) * 1993-03-10 1994-09-30 加藤発条株式会社 ばね組立体
JP2000079422A (ja) * 1998-07-08 2000-03-21 Nok Corp 突起部のプレス加工方法及び突起部を有するプレス加工部材及び密封装置
DE202006000743U1 (de) * 2006-01-18 2006-04-13 Innotec Forschungs- Und Entwicklungs-Gmbh Federstützelement mit daran angebundener Schraubenfeder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000042641A (ja) * 1998-07-29 2000-02-15 Ricoh Co Ltd 位置決め用エンボス構造及び位置決め用エンボス構造加工用の金型

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61206128U (enrdf_load_stackoverflow) * 1985-06-14 1986-12-26
JPH0669446U (ja) * 1993-03-10 1994-09-30 加藤発条株式会社 ばね組立体
JP2000079422A (ja) * 1998-07-08 2000-03-21 Nok Corp 突起部のプレス加工方法及び突起部を有するプレス加工部材及び密封装置
DE202006000743U1 (de) * 2006-01-18 2006-04-13 Innotec Forschungs- Und Entwicklungs-Gmbh Federstützelement mit daran angebundener Schraubenfeder

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JPWO2021044978A1 (enrdf_load_stackoverflow) 2021-03-11
JP7102622B2 (ja) 2022-07-19

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