US3645522A - Spring leaf - Google Patents

Spring leaf Download PDF

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Publication number
US3645522A
US3645522A US42290A US3645522DA US3645522A US 3645522 A US3645522 A US 3645522A US 42290 A US42290 A US 42290A US 3645522D A US3645522D A US 3645522DA US 3645522 A US3645522 A US 3645522A
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US
United States
Prior art keywords
leaf
spring
spring leaf
curved
portions
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
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US42290A
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English (en)
Inventor
Frederick T Rowland
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.)
Boeing North American Inc
Original Assignee
North American Rockwell Corp
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Filing date
Publication date
Application filed by North American Rockwell Corp filed Critical North American Rockwell Corp
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Publication of US3645522A publication Critical patent/US3645522A/en
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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
    • F16F1/18—Leaf springs
    • F16F1/26—Attachments or mountings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/10—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
    • B60G11/12—Links, pins, or bushes

Definitions

  • ABSTRACT A spring leaf comprising an integral substantially cylindrical eye structure on at least one of its ends consisting essentially of adjacent parallel portions cylindrically curved in opposite directions out of the plane of the leaf,
  • the major object of the invention is to provide a novel spring eye structure wherein the stresses are distributed across the section of the leaf by substantial elimination of the bending moments during operation of the vehicle.
  • the present invention contemplates reducing the foregoing difficulties by providing a novel leaf spring eye structure wherein integral parallel oppositely curved end portions form the spring eye and this is another object of the invention.
  • Another object of the invention is to provide a novel integral leaf spring eye structure consisting of adjacent oppositely curved end portions which have their terminal edges adjacent and facing each other near the juncture between the spring eye and the leaf.
  • FIG. 1 is a side elevation showing a spring leaf according to a preferred embodiment of the invention
  • FIG. 2 is a partly broken away fragmentary side elevation showing one end of a spring leaf formed according to the invention
  • FIG. 3 is end view of the spring leaf of FIG. 2;
  • FIG. 4 is top plan view of the spring leaf of FIG. 2;
  • FIG. 5 is a fragmentary side elevation of a spring end illustrating a further embodiment
  • FIG. 6 is an end view of the spring of FIG. 5;
  • FIG. 7 is a fragmentary plan view showing the spring end of FIG. 5.
  • FIG. 8 is a fragmentary side elevation showing an end of a spring leaf formed according to a further embodiment
  • FIGS. 9 and w are respectively plan and end views of the spring end of FIG. 8;
  • FIG. 11 is a fragmentary side elevation showing an end of a spring leaf formed according to a still further embodiment.
  • FIGS. 12 and 13 are respectively plan and end views of the spring end of FIG. 11.
  • FIG. 1 shows a single tapered spring leaf l1 incorporating the invention.
  • the spring leaf is preferably an integral member of some alloy steel or carbon steel or other suitable material conventionally used for vehicle springs.
  • This spring leaf may be of the type having a center section 12 of maximum thickness, usually medially secured to an axle indicated at A, and end sections that gradually reduce in thickness from the center section toward the spring ends.
  • Preferably the spring leaf is of constant width from end to end, and is of uniform size at the opposite end sections.
  • Spring leaf ll has a flat planar surface 14 along its entire length at one side, and at the other side the tapered surfaces 15 and I6 extend at an angle relative to surface 14.
  • Spring leaf llI may advantageously be the tapered leaf spring disclosed inGreene et a].
  • U.S. Pat. No. 3,238,072 and made by the method disclosed in that patent, including forming surfaces 15 and 16 by roll tapering, except that the spring ends in the present invention are formed in a novel manner to provide a novel spring eye structure as will appear.
  • the invention may be applied to any spring leaf, including for example the types disclosed in Komarnitsky U.S. Pat. No. 3,339,908, and Schilling Pat. No. 2,608,752, and the top leaf of an otherwise conventional multileaf spring bundle.
  • FIGS. 2-4 there is shown one end of spring leaf Ill.
  • the other end is preferably identical.
  • the spring end is integrally formed to provide an eye structure 117 adapted to connect the spring end to a pivot on the chassis C or on a shackle S (FIG. I)
  • the integral eye structure 17 consists essentially of a central end portion 18 of the spring end bent upwardly out of the plane of the leaf in a smoothly curved junction I9 and then counterclockwise outwardly, downwardly and back inwardly around in substantially circular curvature to locate its terminal edge 20 adjacent the underside of the leaf at junction I9.
  • Two spring end portions 21 and 22, of the same length as portion l8 and disposed on opposite sides of portion 18, are similarly but reversely bent downwardly out of the plane of the leaf in a smoothly curved junction 23 and then upwardly around in a substantially circular curvature to dispose their terminal edges 24 adjacent the supper side of the leaf adjacent junction 23, Junctions I9 and 23 are adjacent and identical but oppositely curved.
  • leaf end portions 211 and 22 are each of about one-half the width of central portion If ⁇ .
  • the inner surface 25 of leaf end portion I8 is a cylinder having its center on the longitudinal axis of the leaf, and the inner surfaces 26 of the outer side portions 21 and 22 are cylinders of the same radius about the same center.
  • the cylindrical surfaces 25 and 26 which have a common center define an eye structure adapted to pivotally fit over a bushing, a chassis mounted pivot or shackle pin in the usual manner.
  • the spring eye 17 is formed by cutting parallel slits 27 and 28 of equal length and proper lateral spacing at the ends of the otherwise complete spring leaf, and then subjecting the end portions 18, 2ll and 22 to a suitable rolling or equivalent forming operation to provide the cylindrical eye structure.
  • cylindrical eye can be formed by reversely bending the central and side end portions of the leaf respectively oppositely to the above described directions.
  • FIGS. 5-7 illustrate another embodiment of the invention wherein the cylindrical eye structure 29 is formed above the level of the leaf 11.
  • the central end portion 31 is bent upwardly out of the plane of the spring leaf in a smoothly curved junction 32 and then outwardly, downwardly and back inwardly to dispose its terminal edge 33 adjacent junction 32.
  • the two equal width end portions 34 and 35 on opposite sides of central portion 31 extend past junction 32 and are reversely bent in a substantially circular clockwise curvature upward out of the plane of the leaf and then inwardly and downwardly to dispose their terminal edges 36 adjacent juncture 32 and substantially in the same radial plane as edge 33.
  • the cylindrical inner surface 38 of leaf end portion 31 has the same radius as the coaxial cylindrical surfaces 39 of the end portions, so that a cylindrical eye structure is provided at 29 for pivotal connection to the chassis or shackle as in FIG. 1.
  • the eye 29 may be formed by curving the central and end portions respectively oppositely to the above-described directions, or by curving these central and side portions to dispose the cylindrical eye on the underside of the spring leaf.
  • FIGS. 8-10 illustrate another embodiment wherein the cylindrical eye structure 40 is formed of two oppositely curved adjacent end portions 41 and 42 instead of three as in FIGS. 2-4.
  • the spring leaf end is longitudinally slitted back from the end edge a suitable amount, this slit being preferably medial as indicated at 43.
  • the end portion 41 at one side of the slit is bent upwardly out of the plane of the leaf in a smoothly curved junction indicated at 44, and the other end portion 42 is bent downwardly out of the plane of the leaf in a smoothly curved junction indicated at 45.
  • the reversely curved end portions 41 and 42 have aligned coaxial circularly cylindrical inner surfaces 46 and 47 respectively, and the terminal edges 48 and 49 of the respective end portions face each other adjacent the juncture of the eye with the leaf.
  • FIGS. 11-13 illustrate another embodiment wherein the cylindrical eye structure 50 is formed of two oppositely curved adjacent end portions 51 and 52, instead of three as in FIGS;
  • the spring leaf end is longitudinally slitted back from the end edge a suitable amount, this slit being preferably medial as indicated at 53.
  • the end portion 51 at one side of the slit is bent upwardly out of the plane of the leaf in a smoothly curved junction indicated at 54, and then outwardly, downwardly and back inwardly to dispose its terminal edge 55 adjacent junction 54.
  • the other end portion 52 is reversely bent in a circular clockwise curvature upwardly out of the plane of the leaf and then inwardly and downwardly to dispose its terminal edge 56 adjacent juncture 54 and substantially in the same radial plane as edge 55.
  • the reversely curved end portions 5 and 52 have aligned coaxial circularly cylindrical inner surfaces 57 and 58 respectively.
  • the eye consists essentially of at least two side-by-side adjacent oppositely curved end portions of the spring leaf.
  • the total cylindrical inner bearing areas curved in opposite directions are substantially equal.
  • a spring leaf comprising an integral substantially cylindrical eye structure located at least at one of its ends consisting essentially of adjacent end portions curved in opposite directions out of the plane of the leaf, the terminal edges of said spring end portions being disposed adjacent the juncture of the eye structure with the leaf.
  • a spring leaf as defined in claim 1, wherein said eye structure comprises an intermediate end portion curved in one direction out of the plane of the spring leaf, and adjacent opposite side edge portions curved in the opposite direction out of the plane of the spring leaf.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Springs (AREA)
  • Prostheses (AREA)
US42290A 1970-06-01 1970-06-01 Spring leaf Expired - Lifetime US3645522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4229070A 1970-06-01 1970-06-01

Publications (1)

Publication Number Publication Date
US3645522A true US3645522A (en) 1972-02-29

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ID=21921071

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Application Number Title Priority Date Filing Date
US42290A Expired - Lifetime US3645522A (en) 1970-06-01 1970-06-01 Spring leaf

Country Status (12)

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US (1) US3645522A (es)
JP (1) JPS5755555Y2 (es)
BE (1) BE767893A (es)
BR (1) BR7103239D0 (es)
CA (1) CA951751A (es)
DE (1) DE2119406A1 (es)
ES (1) ES169467Y (es)
FR (1) FR2095698A5 (es)
GB (1) GB1320054A (es)
NL (1) NL7105145A (es)
SE (1) SE365757B (es)
ZA (1) ZA712028B (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891197A (en) * 1973-10-15 1975-06-24 Gus L Poulos Single leaf spring
US3945625A (en) * 1972-05-29 1976-03-23 Ressorts Du Nord S. A. Leaf spring
US4475723A (en) * 1982-04-28 1984-10-09 Kidde Recreation Products, Inc. Elongated spring member
US6601836B1 (en) 2000-08-08 2003-08-05 The Boler Company Leaf spring eye wrap scarf gap cover component
US20070108717A1 (en) * 2005-10-21 2007-05-17 Donald Stoesz Elongate spring member having bushing mounts with improved bushing retention characteristics

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5638275Y2 (es) * 1976-08-12 1981-09-07
DE19638806A1 (de) * 1996-09-20 1998-03-26 Bam Anlagen Und Maschinen Gmbh Kalibriermaschine für Federaugen

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US941521A (en) * 1909-07-12 1909-11-30 Harry Jeffrey Elliptic spring.
FR592558A (fr) * 1925-02-02 1925-08-05 Dispositif de lame maîtresse pour ressort de suspension
DE455167C (de) * 1926-05-11 1928-01-25 Maurice Requiere Ringuet Tragblattfeder, insbesondere fuer Kraftfahrzeuge
US2510418A (en) * 1949-09-17 1950-06-06 Roehrig John Vehicle spring suspension
US2568169A (en) * 1949-05-11 1951-09-18 Zenith Radio Corp Stamped helical coil
US2608752A (en) * 1947-11-13 1952-09-02 Gen Motors Corp Method of making single leaf springs
US2682399A (en) * 1951-05-22 1954-06-29 Allen J Imblum Semielliptic leaf spring
US2932056A (en) * 1957-04-05 1960-04-12 Overhead Door Corp Hinge
US3389902A (en) * 1966-12-12 1968-06-25 William E. Young Snap-over center spring and method of making

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4331259Y1 (es) * 1966-09-08 1968-12-18

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US941521A (en) * 1909-07-12 1909-11-30 Harry Jeffrey Elliptic spring.
FR592558A (fr) * 1925-02-02 1925-08-05 Dispositif de lame maîtresse pour ressort de suspension
DE455167C (de) * 1926-05-11 1928-01-25 Maurice Requiere Ringuet Tragblattfeder, insbesondere fuer Kraftfahrzeuge
US2608752A (en) * 1947-11-13 1952-09-02 Gen Motors Corp Method of making single leaf springs
US2568169A (en) * 1949-05-11 1951-09-18 Zenith Radio Corp Stamped helical coil
US2510418A (en) * 1949-09-17 1950-06-06 Roehrig John Vehicle spring suspension
US2682399A (en) * 1951-05-22 1954-06-29 Allen J Imblum Semielliptic leaf spring
US2932056A (en) * 1957-04-05 1960-04-12 Overhead Door Corp Hinge
US3389902A (en) * 1966-12-12 1968-06-25 William E. Young Snap-over center spring and method of making

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945625A (en) * 1972-05-29 1976-03-23 Ressorts Du Nord S. A. Leaf spring
US3891197A (en) * 1973-10-15 1975-06-24 Gus L Poulos Single leaf spring
US4475723A (en) * 1982-04-28 1984-10-09 Kidde Recreation Products, Inc. Elongated spring member
US6601836B1 (en) 2000-08-08 2003-08-05 The Boler Company Leaf spring eye wrap scarf gap cover component
US20070108717A1 (en) * 2005-10-21 2007-05-17 Donald Stoesz Elongate spring member having bushing mounts with improved bushing retention characteristics

Also Published As

Publication number Publication date
ES169467Y (es) 1972-04-16
FR2095698A5 (es) 1972-02-11
DE2119406A1 (de) 1971-12-09
GB1320054A (en) 1973-06-13
NL7105145A (es) 1971-12-03
CA951751A (en) 1974-07-23
JPS5755555Y2 (es) 1982-12-01
ZA712028B (en) 1971-12-29
JPS5659335U (es) 1981-05-21
BR7103239D0 (pt) 1973-05-15
BE767893A (fr) 1971-10-18
SE365757B (es) 1974-04-01
ES169467U (es) 1971-10-01

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