US3865357A - Multiple spring assembly - Google Patents

Multiple spring assembly Download PDF

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Publication number
US3865357A
US3865357A US388297A US38829773A US3865357A US 3865357 A US3865357 A US 3865357A US 388297 A US388297 A US 388297A US 38829773 A US38829773 A US 38829773A US 3865357 A US3865357 A US 3865357A
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US
United States
Prior art keywords
spring
coils
strand
helical coils
annulus
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US388297A
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English (en)
Inventor
Frederick Charles Drummond
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BorgWarner Australia Ltd
Original Assignee
BorgWarner Australia Ltd
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 BorgWarner Australia Ltd filed Critical BorgWarner Australia Ltd
Application granted granted Critical
Publication of US3865357A publication Critical patent/US3865357A/en
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Expired - Lifetime legal-status Critical Current

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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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/06—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
    • F16D25/062—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
    • F16D25/063—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially
    • F16D25/0635—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs
    • F16D25/0638—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/12—Details not specific to one of the before-mentioned types
    • 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

  • a spring device formed by a continuous strand to provide a series of helical coils interconnected by integral portions of the strand, each of the helical coils having a longitudinal axis and said coils being disposed such that the axis is generally perpendicular to the plane of the interconnecting strand portions and the device being in the shape of an annulus such that the axis is generally perpendicular to the plane of the annulus and whereby the device is particularly adapted for use in annular hydraulic servo motors as a piston return spring.
  • a spring device is formed of a continuous strand to provide a plurality of helical coils interconnected by integral portions of the strand, each of said helical coils having a longitudinal axis and said coils being disposed such that said axes are generally parallel.
  • FIG. 1 shows, in front elevation'and partly in section, an assembly of members wherein an integral spring device is disposed in a groove;
  • FIG. 2 shows, in plan, a view along the line 2--2 of FIG. 1;
  • FIG. 3 shows, in plan view, a spring cluster before assembly as shown in FIGS. 1 and 2;
  • FIG. 4 shows, in front elevation, a view along the line 4-4 of FIG. 3;
  • FIG. 5 shows, in plan view, a modification of the spring cluster of FIGS. 3 and 4;
  • FIG. 6 shows, in front elevation, a view along line 6-6 of FIG. 5.
  • FIG. 1 a cross-sectional view is presented of a hydraulic servomotor 5 of a type suitable for use in an automatic transmission to actuate a friction engaging device such as a clutch or brake.
  • the servomotor 5 includes a piston 6 slidable in a cylinder 7. Friction discs 8 are provided adapted to be compressed into contact or engagement by fluid pressure acting on the upper side of the piston 6.
  • An annular groove 9 is provided in piston 6 which is adapted to receive the abutting end of a multi-coil integral helical compression spring 10.
  • the several coil springs used in known assemblies of this type are replaced by the improved advantageous multi-coil integral spring 10 as illustrated in the draw ings.
  • Use of the spring 10 obviates the normal problem encountered in keeping the individual coil springs from falling out of place or being dislodged during assembly.
  • the individual springs are mutually attached in a single unit and form '(for example) from a continuous strand or wire having adjacent helically wound portions, 14 and 16, connected by integral bridging links 18.
  • said spring 10 may be left with its ends free or said ends may be joined by welding or'otherwise for form an annulus, so that the spring 10 may be disposed in the groove 9 as a unit before enclosing said spring between the groove 9 and the flange 11 in a subsequent assembly step, which will prevent ready displacement of the individual helical elements.
  • the links 18 may (of course) remain after the final assembly, since they take no part in the action of the individual helical elements.
  • the device 10 may be formed in shapes other than an annulus where the shape of the groove in which it is to fit is otherwise, for example el liptical or other closed configurations.
  • each of the individual coils 14 or 16 has a longitudinal axis 28 and a central straight mid-portion 30.
  • Above and below the mid-portion 30 is an upper section 32 and a lower section 34 wound in opposite rotational directions about axis 28 or, expressed another way, the sections 32 and 34 are of opposite hand.
  • the winding of the individual springs 14 and 16 must be in a direction that the connecting links 18 of the continuous wire enter adjacent coils at the same end, either the top or the bottom thereof, as illustrated in FIG. 4.
  • the individual coils l4 and 16 are disposed when the annulus shape of the spring device 10 is formed perpendicular to the plane of the annulus.
  • the helical portions are inter spersed between alternating tangential inner and outer integral link portions such as 24 and 26, respectively, which maybe more suitably employed in certain as semblies.
  • the present invention has distinct advantages in that in the problem in assembly operations where a plurality of individual coil springs must be held in position during assembly is eliminated since all of the coils in the instant device are secured together. Further, other advantages are provided in that whereas it is often necessary to grind the faces of individual coil springs when used in the environment shown in FIG. 1 to prevent same from cocking when the device is in use with the integral form of spring device 10, such grinding is unnecessary since the integral nature of the device maintains the individual coils in their proper position during use.
  • a spring device formed by a continuous strand to provide a series of helical coils interconnected by integral portions of the strand, each of said helical coils having a longitudinal axis and said coils being disposed such that said axis is generally perpendicular to the plane of said interconnecting strand portions, said device being in the shape of an annulus whereby said axis is generally perpendicular to the plane of said annulus.
  • each of said helical coils includes a mid-portion and with the sections on either side thereof being of opposite hand.
  • a spring for use in an annular hydraulic servomotor said spring formed by a continuous strand to provide a series of helical coils in an annular array interconnected by integral portions of the strand, said servomotor including a flat annular surface, said spring adapted to engage said flat annular surface, each of said helical coils having a longitudinal axis substantially perpendicular to said annular surface, and the longitudinal axis of each of said coils being generally parallel.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
US388297A 1972-08-17 1973-08-13 Multiple spring assembly Expired - Lifetime US3865357A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU45674/72A AU4567472A (en) 1972-08-17 1972-08-17 Multiple spring assembly

Publications (1)

Publication Number Publication Date
US3865357A true US3865357A (en) 1975-02-11

Family

ID=3732767

Family Applications (1)

Application Number Title Priority Date Filing Date
US388297A Expired - Lifetime US3865357A (en) 1972-08-17 1973-08-13 Multiple spring assembly

Country Status (7)

Country Link
US (1) US3865357A (fi)
JP (1) JPS4985449A (fi)
AU (1) AU4567472A (fi)
BR (1) BR7306330D0 (fi)
DE (1) DE2341543A1 (fi)
FR (1) FR2196444B3 (fi)
IT (1) IT994141B (fi)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050241905A1 (en) * 2004-04-30 2005-11-03 Duwel Jeffrey A Torsional return spring for a clutch

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4515258A (en) * 1983-03-09 1985-05-07 Allied Corporation Clutch drive with link spring
JPS6093025U (ja) * 1983-11-30 1985-06-25 三菱電機株式会社 オ−バランニングクラツチ
JPH01122532U (fi) * 1988-02-16 1989-08-21

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1906449A (en) * 1932-04-13 1933-05-02 Hider Steel Ball Works Method of making coil springs
US2951109A (en) * 1956-05-18 1960-08-30 Minnesota Mining & Mfg Wire-connector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1906449A (en) * 1932-04-13 1933-05-02 Hider Steel Ball Works Method of making coil springs
US2951109A (en) * 1956-05-18 1960-08-30 Minnesota Mining & Mfg Wire-connector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050241905A1 (en) * 2004-04-30 2005-11-03 Duwel Jeffrey A Torsional return spring for a clutch

Also Published As

Publication number Publication date
FR2196444B3 (fi) 1976-07-30
FR2196444A1 (fi) 1974-03-15
BR7306330D0 (pt) 1974-06-27
DE2341543A1 (de) 1974-02-28
JPS4985449A (fi) 1974-08-16
IT994141B (it) 1975-10-20
AU4567472A (en) 1974-02-21

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