GB1253586A - Improvements relating to internal shoe-drum brakes for vehicles - Google Patents

Improvements relating to internal shoe-drum brakes for vehicles

Info

Publication number
GB1253586A
GB1253586A GB4015669A GB4015669A GB1253586A GB 1253586 A GB1253586 A GB 1253586A GB 4015669 A GB4015669 A GB 4015669A GB 4015669 A GB4015669 A GB 4015669A GB 1253586 A GB1253586 A GB 1253586A
Authority
GB
United Kingdom
Prior art keywords
piston
wedge
pistons
moved
brake
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
GB4015669A
Inventor
Michael James Hughes
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 GB4015669A priority Critical patent/GB1253586A/en
Publication of GB1253586A publication Critical patent/GB1253586A/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
    • F16D51/10—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as exclusively radially-movable brake-shoes
    • F16D51/12—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as exclusively radially-movable brake-shoes 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
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/10—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as exclusively radially-movable brake-shoes
    • F16D51/14—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as exclusively radially-movable brake-shoes 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
    • F16D65/14—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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/58—Mechanical mechanisms transmitting linear movement
    • F16D2125/66—Wedges

Landscapes

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

Abstract

1,253,586. Internal shoe drum brakes; slave cylinders; spring applied, fluid pressure released brakes. GIRLING Ltd. 5 Aug., 1970 [12 Aug., 1969], No. 40156/69. Headings F2E and F2F. An internal shoe-drum brake has two shoes 10, 11 which are separated to apply the brake by opposed pistons 14, 15 and 19, 20 movable in respective double-ended hydraulic cylinders 16 and 18: for service braking the pistons 14, 15 and 19, 20 are urged apart by hydraulic pressure but for parking or emergency braking the pistons 19, 20 are moved apart mechanically by a wedge 26, the wedge 26 being actuated by a spring (in the form of Bellville washers 35 or a compression spring) which is normally held inoperative by fluid pressure. As shown, the cylinder 18 contains a third piston 21 and in service braking hydraulic pressure is introduced through on inlet 42 into a chamber 23 between pistons 20 and 21, whereby piston 20 is moved directly and piston 19 is moved through piston 21. In parking or emergency braking the wedge 26 is movable in slots 24, 25 in the pistons 19, 21 with the interposition of free running rollers 27, 28 retained in cages on the wedge 26 and the piston 19 is moved directly and the piston 20 is moved through piston 21. The wedge 26 is mounted on a rod 29 coupled by a swivelling joint 31 to a piston 32 working in a bore 33. To release and apply the brake by the wedge 26 fluid pressure is introduced into and evacuated from an annular chamber 37. Automatic adjusters 17, 17<SP>1</SP> are provided for both shoes 10, 11.
GB4015669A 1969-08-12 1969-08-12 Improvements relating to internal shoe-drum brakes for vehicles Expired GB1253586A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4015669A GB1253586A (en) 1969-08-12 1969-08-12 Improvements relating to internal shoe-drum brakes for vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4015669A GB1253586A (en) 1969-08-12 1969-08-12 Improvements relating to internal shoe-drum brakes for vehicles

Publications (1)

Publication Number Publication Date
GB1253586A true GB1253586A (en) 1971-11-17

Family

ID=10413465

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4015669A Expired GB1253586A (en) 1969-08-12 1969-08-12 Improvements relating to internal shoe-drum brakes for vehicles

Country Status (1)

Country Link
GB (1) GB1253586A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550855A1 (en) * 1974-11-15 1976-05-20 Girling Ltd ACTUATING DEVICE FOR VEHICLE BRAKES
JPS551051U (en) * 1979-03-22 1980-01-07
DE3026938A1 (en) * 1980-07-16 1982-02-04 Deutsche Perrot-Bremse Gmbh, 6800 Mannheim INNER JAW DRUM BRAKE

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550855A1 (en) * 1974-11-15 1976-05-20 Girling Ltd ACTUATING DEVICE FOR VEHICLE BRAKES
FR2291414A1 (en) * 1974-11-15 1976-06-11 Girling Ltd IMPROVEMENTS TO VEHICLE BRAKE ACTUATORS
US4013150A (en) * 1974-11-15 1977-03-22 Girling Limited Mechanically and hydraulically operated brake actuator
JPS551051U (en) * 1979-03-22 1980-01-07
JPS5644909Y2 (en) * 1979-03-22 1981-10-21
DE3026938A1 (en) * 1980-07-16 1982-02-04 Deutsche Perrot-Bremse Gmbh, 6800 Mannheim INNER JAW DRUM BRAKE
FR2493442A1 (en) * 1980-07-16 1982-05-07 Perrot Bremse Gmbh Deutsche INTERIOR BRAKE WITH DRUM AND JAWS

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