GB2013806A - Internal shoe drum brakes - Google Patents

Internal shoe drum brakes

Info

Publication number
GB2013806A
GB2013806A GB7904973A GB7904973A GB2013806A GB 2013806 A GB2013806 A GB 2013806A GB 7904973 A GB7904973 A GB 7904973A GB 7904973 A GB7904973 A GB 7904973A GB 2013806 A GB2013806 A GB 2013806A
Authority
GB
United Kingdom
Prior art keywords
strut
shoe
shoes
ratchet
back plate
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.)
Granted
Application number
GB7904973A
Other versions
GB2013806B (en
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 GB7904973A priority Critical patent/GB2013806B/en
Priority claimed from AU45351/79A external-priority patent/AU4535179A/en
Publication of GB2013806A publication Critical patent/GB2013806A/en
Application granted granted Critical
Publication of GB2013806B publication Critical patent/GB2013806B/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
    • F16D65/56—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
    • 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
    • F16D2051/001—Parts or details of drum brakes
    • F16D2051/003—Brake supports

Landscapes

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

Abstract

An internal shoe drum brake comprises a pair of brake shoes (11, 12), an adjustable length strut (22) extending between the shoes and having a ratchet (23) movement of which adjusts the length of the strut, an actuating lever (18) pivotally connected to one end of the strut and engaging one shoe (12), the lever (18) being so arranged that a force acting on one end in a direction generally parallel to the drum axis rotates the lever to exert a force on one shoe (12) and a reaction force through the intermediary of the strut (22) on the other shoe (11) to urge said shoes apart, and a pawl engageable with the ratchet. To reduce the number of parts the pawl is pivotally mounted on the other shoe (11) and is rotatable about its pivot to move the ratchet (23) and thereby adjust the length of the strut (22) when there is excess wear of the shoes. Furthermore, the strut (22) preferably has a portion which is engageable with a surface portion (29) of the brake back plate (10), or a member secured to the back plate, to react forces to the back plate. The surface portion (29) is preferably parallel with the strut axis to permit sliding movement of the strut thereon. <IMAGE>
GB7904973A 1978-02-01 1979-02-13 Internal shoe drum brakes Expired GB2013806B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7904973A GB2013806B (en) 1978-02-01 1979-02-13 Internal shoe drum brakes

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB399378 1978-02-01
GB7904973A GB2013806B (en) 1978-02-01 1979-02-13 Internal shoe drum brakes
AU45351/79A AU4535179A (en) 1978-02-01 1979-03-20 Improvements in or relating to internal shoe drum brakes

Publications (2)

Publication Number Publication Date
GB2013806A true GB2013806A (en) 1979-08-15
GB2013806B GB2013806B (en) 1982-03-31

Family

ID=27154330

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7904973A Expired GB2013806B (en) 1978-02-01 1979-02-13 Internal shoe drum brakes

Country Status (1)

Country Link
GB (1) GB2013806B (en)

Also Published As

Publication number Publication date
GB2013806B (en) 1982-03-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee