US3864800A - Manufacturing of shoes for vehicle brakes - Google Patents

Manufacturing of shoes for vehicle brakes Download PDF

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Publication number
US3864800A
US3864800A US385879A US38587973A US3864800A US 3864800 A US3864800 A US 3864800A US 385879 A US385879 A US 385879A US 38587973 A US38587973 A US 38587973A US 3864800 A US3864800 A US 3864800A
Authority
US
United States
Prior art keywords
web
shoe
opening
forming
extruded portion
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
US385879A
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English (en)
Inventor
Robert Valentine Mathers
Derek Unsworth
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.)
Rubery Owen Rockwell Ltd
Original Assignee
Rubery Owen Rockwell 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 Rubery Owen Rockwell Ltd filed Critical Rubery Owen Rockwell Ltd
Application granted granted Critical
Publication of US3864800A publication Critical patent/US3864800A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
    • F16D65/09—Pivots or supporting members therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49643—Rotary bearing
    • Y10T29/49647—Plain bearing

Definitions

  • the usual shoe for an internal shoe-drum brake comprises an arcuate flange carrying a friction lining and a web or two spaced parallel webs welded or otherwise secured to the flange.
  • each shoe pivots about one end on a pin fixed in the stationary backplate and the other end is engaged by a cam or other actuator for applying the shoe to a rotatable drum, the pivot pin passing through a bearing opening in the shoe web or webs.
  • the web or each web is usually a sheet steel pressing or stamping.
  • Our invention is concerned with the formation of the bearing opening in a shoe web.
  • a method of forming the bearing opening for the pivot pin in the web of a shoe of an internal shoe-drum brake comprises the steps of piercing the web at the required position, extruding the web at the pierced hole, forming the extruded portion to increase the thickness of the web around the opening, and finally machining the opening to suit the pivot pin.
  • the forming operation is preferably carried out cold but hot forming can be used if preferred.
  • FIG. 1 is an elevation of one end of a shoe web
  • FIG. 2 is a section on the line )(X of FIG. 1.
  • the web 1 of the shoe of an internal shoe drum brake has been formed at one end with a bearing opening 2.
  • the upper surface in FIG. 2 of the part of the web surrounding the opening has been formed into a boss 3 which protrudes above the surrounding surfaces 4 of the web.
  • the underside of the web around the opening 2 has been formed with a recess 5.
  • the opening has been formed in the following way in a web which was initially in the form of a flat metal plate of substantially uniform thickness.
  • the metal has first been pierced with a sharp tool which has then been further forced through the web from one side, the underside in FIG. 2, to produce a funnel-shaped formation on the other side of the web.
  • This formation has then been subjected to a cold coining operation between suitably shaped dies so as to form the boss 3 surrounding the opening.
  • the overall thickness of the boss is, of course, greater than that of the undeformed web material.
  • the underside of the web, in FIG. 2 has simultaneously been formed into the recess 5.
  • the opening has been machined to size, by drilling and reaming for example.
  • a method of forming the bearing opening for the pivot pin in the web of a shoe of an internal shoe-drum brake comprising the steps of piercing the web at the required position, extruding the web at the pierced hole, forming the extruded portion to increase the thickness of the web around the opening, and finally machining the opening to suit the pivot pin.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
US385879A 1972-08-12 1973-08-06 Manufacturing of shoes for vehicle brakes Expired - Lifetime US3864800A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3769472A GB1380481A (en) 1972-08-12 1972-08-12 Mnufacture of shoes for vehicle brakes

Publications (1)

Publication Number Publication Date
US3864800A true US3864800A (en) 1975-02-11

Family

ID=10398337

Family Applications (1)

Application Number Title Priority Date Filing Date
US385879A Expired - Lifetime US3864800A (en) 1972-08-12 1973-08-06 Manufacturing of shoes for vehicle brakes

Country Status (4)

Country Link
US (1) US3864800A (fr)
DE (1) DE2340446A1 (fr)
FR (1) FR2196043A5 (fr)
GB (1) GB1380481A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5346040A (en) * 1990-04-12 1994-09-13 Borg-Warner Automotive Transmission & Engine Components Corporation One-piece transmission band
US5078237A (en) * 1990-06-28 1992-01-07 Borg-Warner Automotive Transmission & Engine Components Corporation Automatic transmission bands
US5263557A (en) * 1990-06-28 1993-11-23 Borg-Warner Automotive Transmission & Engine Components Corporation Anchor for automatic transmission bands
US5347702A (en) * 1990-06-28 1994-09-20 Borg-Warner Automotive Transmission & Engine Components Corporation Method of producing a transmission brake band

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1272051A (en) * 1914-06-24 1918-07-09 Donald W Kelley Process of producing bearing-apertures in trap-springs.
US2617178A (en) * 1949-06-23 1952-11-11 James M Leake Method of making engine rocker arms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1272051A (en) * 1914-06-24 1918-07-09 Donald W Kelley Process of producing bearing-apertures in trap-springs.
US2617178A (en) * 1949-06-23 1952-11-11 James M Leake Method of making engine rocker arms

Also Published As

Publication number Publication date
GB1380481A (en) 1975-01-15
FR2196043A5 (fr) 1974-03-08
DE2340446A1 (de) 1974-02-28

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