GB1287884A - - Google Patents

Info

Publication number
GB1287884A
GB1287884A GB1287884DA GB1287884A GB 1287884 A GB1287884 A GB 1287884A GB 1287884D A GB1287884D A GB 1287884DA GB 1287884 A GB1287884 A GB 1287884A
Authority
GB
United Kingdom
Prior art keywords
brake
spindle
spring
brake shoes
pawl
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
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 filed Critical
Publication of GB1287884A publication Critical patent/GB1287884A/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

Landscapes

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

Abstract

1287884 Internal shoe drum brakes GIRLING Ltd 20 Nov 1969 [15 Oct 1968] 48763/68 Heading F2E An internal shoe drum brake includes shoe actuating means 6 for expanding the brake shoes and a strut assembly operatively engaged at its opposite ends with the respective brake shoes 2, 3 and acting as a stop for the brake shoes in the unoperated condition of the brake. The strut assembly extends and retracts to follow up the movement of the brake shoes 2, 3 and incorporates an adjuster for adjusting the brake shoe clearance. The strut comprises a socket member 8 having a spindle 12 slidably and rotatably mounted therein and biased away therefrom, the spindle 12 being screw threadedly engaged in a further socket member 9 the adjuster being arranged to effect relative rotation of the spindle 12 and socket member 9 in response to a predetermined minimum extension of the strut assembly during brake operation. The member 8 abuts the brake shoe 2 such that the brake shoes 2, 3 may also be actuated through the strut by means of a floating two part lever 20, 21. In operation the two parts 20, 21 of the lever are locked together by a pin 22 or by an adjustable means, unlocking of the two parts being effected prior to dismantling of the brake. The adjuster comprises a spring 18 interposed between the member 8 and a sleeve 14 rotatably mounted on the spindle, the spring carrying a pawl 19 which co-operates with a ratchet wheel 16 fixed to the spindle 12. In the brakes off condition the spring 18 is under compression and bowed but on actuation of the brakes by the means 6 the strut assembly extends allowing the spring 18 to straighten and the pawl 19 to drive the ratchet wheel 16 in rotation. If the brake shoes require adjustment, on return of the brake to its inoperative condition, the pawl 19 rides over a tooth of the ratchet wheel 16. In a further embodiment rotation of the ratchet wheel takes place during the release of the brakes (Fig. 3, not shown). Devices including a pawl and ratchet and/or a clutch spring may be used to prevent shortening of the strut assembly.
GB1287884D 1968-10-15 1968-10-15 Expired GB1287884A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4876368 1968-10-15

Publications (1)

Publication Number Publication Date
GB1287884A true GB1287884A (en) 1972-09-06

Family

ID=10449825

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1287884D Expired GB1287884A (en) 1968-10-15 1968-10-15

Country Status (1)

Country Link
GB (1) GB1287884A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457416A1 (en) * 1979-05-21 1980-12-19 Lucas Industries Ltd IMPROVEMENTS ON DEVICES FOR AUTOMATIC ADJUSTMENT OF DRUM BRAKES
US4757882A (en) * 1983-12-27 1988-07-19 Nissin Kogyo Kabushiki Kaisha Mechanically-operated drum brake device
EP0388057A1 (en) * 1989-03-11 1990-09-19 Automotive Products Plc Automatic adjuster for drum brake
WO1994012805A1 (en) * 1992-11-25 1994-06-09 Automotive Products Plc Automatic brake adjusters

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457416A1 (en) * 1979-05-21 1980-12-19 Lucas Industries Ltd IMPROVEMENTS ON DEVICES FOR AUTOMATIC ADJUSTMENT OF DRUM BRAKES
US4757882A (en) * 1983-12-27 1988-07-19 Nissin Kogyo Kabushiki Kaisha Mechanically-operated drum brake device
EP0388057A1 (en) * 1989-03-11 1990-09-19 Automotive Products Plc Automatic adjuster for drum brake
EP0538909A2 (en) * 1989-03-11 1993-04-28 Automotive Products Plc Automatic adjuster for drum brake
EP0538909A3 (en) * 1989-03-11 1994-05-11 Automotive Products Plc Automatic adjuster for drum brake
WO1994012805A1 (en) * 1992-11-25 1994-06-09 Automotive Products Plc Automatic brake adjusters
GB2278164A (en) * 1992-11-25 1994-11-23 Automotive Products Plc Automatic brake adjusters
GB2278164B (en) * 1992-11-25 1996-03-13 Automotive Products Plc Automatic brake adjusters

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Legal Events

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