GB724848A - An improved self-energising internal shoe-drum brake more particularly for motor vehicles - Google Patents

An improved self-energising internal shoe-drum brake more particularly for motor vehicles

Info

Publication number
GB724848A
GB724848A GB11329/53A GB1132953A GB724848A GB 724848 A GB724848 A GB 724848A GB 11329/53 A GB11329/53 A GB 11329/53A GB 1132953 A GB1132953 A GB 1132953A GB 724848 A GB724848 A GB 724848A
Authority
GB
United Kingdom
Prior art keywords
shoe
intermediate member
force
brake
arm
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
GB11329/53A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB724848A publication Critical patent/GB724848A/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
    • F16D51/46—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action
    • F16D51/48—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action with two linked or directly-interacting brake shoes
    • F16D51/52—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action with two linked or directly-interacting brake shoes fluid actuated

Landscapes

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

Abstract

724,848. Internal shoe-drum brakes. PORSCHE, F. April 24, 1953 [June 21, 1952], No. 11329/53. ' Class 103 (1). A self-energizing internal shoe drum brake which is provided with freely suspended shoes supported on a two-arm intermediate member, the two arms of the said intermediate member forming an obtuse angle with each other, is characterized in that the intermediate member is provided with a third arm by means of which it is so articulated to the brake carrier plate that nearly half of. the supporting force transmitted from the primary shoe to the intermediate member is transmitted to the secondary shoe. The figure illustrates the invention applied to a motor vehicle in which a primary shoe I and a secondary shoe 2 are applied by means of an hydraulic brake cylinder 6, the lower ends of the brake shoes being supported by a two-arm intermediate member 7, the arms 8 and 9 of which form together an obtuse angle (150- 155 degrees) corresponding to direction of the forces exerted by the brake shoes; arm 9 being substantially parallel to the axis of the brake cylinder. The intermediate member 7 is provided with a third arm 10 which is pivotally mounted on the brake carrier plate 5 on a bolt 11. The force P1 introduced into the primary shoe 1 by the brake cylinder 6 presses the shoe against the revolving brake drum 12. This action presses the shoe 1 on the intermediate member 7 with a force P1<SP>1</SP>; which force is approximately three times the introduced force P1. In order to introduce the same braking effect to prevent unequal braking forces from being effected on both shoes, substantially the same force has to be introduced in the secondary shoe 2 as in the primary shoe 1. Hence P1<SP>1</SP> is split into two components P2 and Pa in which P2 is 30 per cent to 50 per cent of force P1<SP>1</SP>. The value and direction of the other component force Pa, which governs the point of articulations of the intermediate member to the brake carrier plate, follows from the parallelogram of forces.
GB11329/53A 1952-06-21 1953-04-24 An improved self-energising internal shoe-drum brake more particularly for motor vehicles Expired GB724848A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE724848X 1952-06-21

Publications (1)

Publication Number Publication Date
GB724848A true GB724848A (en) 1955-02-23

Family

ID=6634795

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11329/53A Expired GB724848A (en) 1952-06-21 1953-04-24 An improved self-energising internal shoe-drum brake more particularly for motor vehicles

Country Status (1)

Country Link
GB (1) GB724848A (en)

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