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GB1413644A - Internal-shoe drum brake - Google Patents

Internal-shoe drum brake

Info

Publication number
GB1413644A
GB1413644A GB817674A GB817674A GB1413644A GB 1413644 A GB1413644 A GB 1413644A GB 817674 A GB817674 A GB 817674A GB 817674 A GB817674 A GB 817674A GB 1413644 A GB1413644 A GB 1413644A
Authority
GB
United Kingdom
Prior art keywords
shoe
lever
cylinder
rod
pivoted
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
Application number
GB817674A
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.)
DBA SA
Original Assignee
DBA SA
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 DBA SA filed Critical DBA SA
Publication of GB1413644A publication Critical patent/GB1413644A/en
Expired legal-status Critical Current

Links

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
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/22—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart, e.g. for drum brakes
    • 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
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
    • F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
    • F16D51/20—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots
    • F16D51/24—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots fluid actuated
    • 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
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • F16D65/54—Slack adjusters mechanical self-acting in one direction for adjusting excessive play by means of direct linear adjustment
    • F16D65/546—Slack adjusters mechanical self-acting in one direction for adjusting excessive play by means of direct linear adjustment for mounting within the confines of a drum brake

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

1413644 Internal shoe drum brakes; wear adjustment; actuators SOC ANON DBA 22 Feb 1974 [22 March 1973] 8176/74 Headings F2E and F2F An internal shoe-drum brake has a leading shoe 12 and a trailing shoe 14 which are in floating contact at one end with a fulcrum block 26 and are operable at the other end by a wheel cylinder 24 having two pistons 52, 54 which cooperate with the respective shoes 12, 14, abutment means in the form of an adjusting lever 30 and a rod 34 and determining the minimum distance between the two ends operable by the wheel cylinder 24, and a friction ring 62 provided in the cylinder 24 to offer predetermined resistance to the sliding of the piston 54 in the cylinder 24. The ring 62 is held in place against a shoulder 58 in a blind bore 56 in the piston 54 by means of an annular chock assembly 64 and a washer 60, and the ring 62 slides frictionally on a pin 72 attached to a partition 66 fitted to the cylinder 24 and held in position by two washers 68. As shown, the lever 30 which is pivoted on shoe 12 has a toothed sector co-operating with a toothed sector of a pawl 32, also pivoted on shoe 12. A projection 46 on the end of rod 34 enters an opening 48 in the lever 30 and is normally a predetermined distance from the inner edge of the opening 48, so as to give a connection with predetermined play between the rod 34 and the adjusting lever 30. A hand brake lever 38 is pivoted on shoe 14 and contacts the end of a slot 36 in rod 34 and the flange 18 of shoe 14. During cylinder brake application the main braking action is by leading shoe 14. If the wear of the linings 20, 22 exceeds the predetermined play between rod 34 and lever 30 the lever 30 is pivoted, the pawl 32 being brought into contact with the lever 30 by a torsion spring 33, and the ends of the shoes nearer the wheel cylinder 24 are moved apart. When the pressure drops in the wheel cylinder 24 a return spring 44 lifts the shoes 12, 14 of the drum, and each shoe 12, 14 carries its respective piston 52,54 along as it returns-movement of the piston 54 is braked by ring 62 and this is said to prevent vibrations and to ensure automatic centring of the shoes 12, 14.
GB817674A 1973-03-22 1974-02-22 Internal-shoe drum brake Expired GB1413644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7310263A FR2222900A5 (en) 1973-03-22 1973-03-22

Publications (1)

Publication Number Publication Date
GB1413644A true GB1413644A (en) 1975-11-12

Family

ID=9116683

Family Applications (1)

Application Number Title Priority Date Filing Date
GB817674A Expired GB1413644A (en) 1973-03-22 1974-02-22 Internal-shoe drum brake

Country Status (8)

Country Link
JP (1) JPS5525297B2 (en)
AR (1) AR209910A1 (en)
BR (1) BR7402105D0 (en)
DE (1) DE2410253C2 (en)
FR (1) FR2222900A5 (en)
GB (1) GB1413644A (en)
IT (1) IT1007714B (en)
SE (1) SE406004B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2913127C2 (en) * 1979-04-02 1986-10-23 Deutsche Perrot-Bremse Gmbh, 6800 Mannheim Spreading device for a duo-duplex or servo brake
DE3363486D1 (en) * 1982-03-16 1986-06-19 Automotive Prod Plc Automatic adjuster for internal shoe drum brakes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431551A (en) * 1944-11-15 1947-11-25 Bendix Aviat Corp Support construction for hydraulic brake wheel cylinders
US2741338A (en) * 1953-05-07 1956-04-10 H & T Ind Ltd Self-adjusting mechanism for hydraulic wheel brakes
DE1475493A1 (en) * 1965-06-21 1969-05-22 Teves Gmbh Alfred Adjustment cylinder for hydraulically operated inner shoe brakes
FR2051010A5 (en) * 1970-06-10 1971-04-02 Dba
US3623578A (en) * 1970-07-01 1971-11-30 Gen Motors Corp Combined self-adjuster and parking brake actuating mechanism

Also Published As

Publication number Publication date
AR209910A1 (en) 1977-06-15
JPS49121075A (en) 1974-11-19
SE406004B (en) 1979-01-15
IT1007714B (en) 1976-10-30
FR2222900A5 (en) 1974-10-18
DE2410253C2 (en) 1984-06-20
BR7402105D0 (en) 1974-11-19
DE2410253A1 (en) 1974-09-26
JPS5525297B2 (en) 1980-07-04

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940221