GB1362673A - Internal shoe drum brakes - Google Patents

Internal shoe drum brakes

Info

Publication number
GB1362673A
GB1362673A GB3944371A GB3944371A GB1362673A GB 1362673 A GB1362673 A GB 1362673A GB 3944371 A GB3944371 A GB 3944371A GB 3944371 A GB3944371 A GB 3944371A GB 1362673 A GB1362673 A GB 1362673A
Authority
GB
United Kingdom
Prior art keywords
pawl
spring
strut
aug
rotation
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
GB3944371A
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.)
Girling Ltd
Original Assignee
Girling 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 Girling Ltd filed Critical Girling Ltd
Priority to GB3944371A priority Critical patent/GB1362673A/en
Publication of GB1362673A publication Critical patent/GB1362673A/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
    • 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
    • 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
    • F16D51/22—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 mechanically 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
    • F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
    • F16D65/561—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting within the confines of a drum brake
    • F16D65/563—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting within the confines of a drum brake arranged adjacent to service brake actuator, e.g. on parking brake lever, and not subjected to service brake force

Landscapes

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

Abstract

1362673 Internal shoe drum brakes; adjusting for wear GIRLING Ltd 23 Aug 1971 [24 Aug 1970] 39443/71 Addition to 1199191 Heading F2E In an improvement or modification of the invention claimed in Specification 1,199,191 and with particular regard to Figs. 3-5, thereof a coil spring 12 prestressed in torsion and in compression acts on the pawl 10 on the one hand to bias it to rotate in a sense to increase the length of the strut 6 and on the other hand to urge the pawl 10 into engagement with the ratchet 8A, the rotational force applied to the pawl 10 by the spring 12 being intermediate the force required to overcome the frictional resistance to rotation of the strut parts 7, 9 when the strut 6 is subjected to load by the shoe return springs S and the force required to effect such rotation when the shoe return spring load is relieved by actuation of the service brake 1. The pawl 10 and a cross-pull lever 120 of a handbrake mechanism are mounted on a shaft 121 which has its lower end supported in a bracket 122 and which is surrounded by the spring 12; the pawl 10 has an offset portion 10C bearing against the lever 120, to provide a rocking fulcrum for the pawl 10 about an axis extending transversely to the rotational axis of the pawl 10. (For Fig. 5 see next page.)
GB3944371A 1971-08-23 1971-08-23 Internal shoe drum brakes Expired GB1362673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3944371A GB1362673A (en) 1971-08-23 1971-08-23 Internal shoe drum brakes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3944371A GB1362673A (en) 1971-08-23 1971-08-23 Internal shoe drum brakes

Publications (1)

Publication Number Publication Date
GB1362673A true GB1362673A (en) 1974-08-07

Family

ID=10409572

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3944371A Expired GB1362673A (en) 1971-08-23 1971-08-23 Internal shoe drum brakes

Country Status (1)

Country Link
GB (1) GB1362673A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309079A1 (en) * 1987-08-27 1989-03-29 LUCAS INDUSTRIES public limited company Actuator for a drum brake
US5167304A (en) * 1991-10-15 1992-12-01 Allied-Signal Inc. Drum brake torsion/compression strut spring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309079A1 (en) * 1987-08-27 1989-03-29 LUCAS INDUSTRIES public limited company Actuator for a drum brake
US5167304A (en) * 1991-10-15 1992-12-01 Allied-Signal Inc. Drum brake torsion/compression strut spring

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Legal Events

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