GB765823A - Improvements in and relating to apparatus for the automatic adjustment of the clearance of brake-shoes - Google Patents

Improvements in and relating to apparatus for the automatic adjustment of the clearance of brake-shoes

Info

Publication number
GB765823A
GB765823A GB284955A GB284955A GB765823A GB 765823 A GB765823 A GB 765823A GB 284955 A GB284955 A GB 284955A GB 284955 A GB284955 A GB 284955A GB 765823 A GB765823 A GB 765823A
Authority
GB
United Kingdom
Prior art keywords
brake
clearance
friction ring
cylinder
working pistons
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
GB284955A
Inventor
Antonin Nahodil
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
Priority to GB284955A priority Critical patent/GB765823A/en
Publication of GB765823A publication Critical patent/GB765823A/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
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • F16D65/54—Slack adjusters mechanical self-acting in one direction for adjusting excessive play by means of direct linear adjustment
    • F16D65/546—Slack adjusters mechanical self-acting in one direction for adjusting excessive play by means of direct linear adjustment for mounting within the confines of a drum brake

Landscapes

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

Abstract

765,823. Automatic adjustment devices for brakes. ZAPADOCESKE AUTODRUZSTVO. Jan. 31, 1955, No. 2849/55. Class 103 (1). In an automatic adjustment mechanism for adjusting the clearance of brake shoes, the adjusting means, retained by friction, are mounted in the wheel brake cylinder and are adapted to be engaged by a shoulder on working pistons in such a way that movement in an axial direction through a distance equal to the clearance necessary for the disengagement of the brake shoes from the brake drum is possible between the working pistons and the frictional adjusting means, the latter being capable of being displaced solely by the force produced by the pressure of liquid during the braking operation. In the embodiment illustrated the invention is applied to an internal shoe drum brake, the working pistons 4 of the wheel brake cylinder 1 are each provided with a projection 6 over which a split friction ring 7 is fitted and on which is screwed a cylindrical nut 9 having a flange or head 10. The split friction ring 7 has a slightly larger diameter than the bore of the cylinder 1 such that it is provided with frictional resistance in the bore. In the operative position of the brake illustrated in Fig. 1, the working pistons 4 are forced apart by hydraulic pressure supplied via aperture 2 from the master cylinder, and the flange 10 of the cylindrical nut 9 secured to the piston 4 abuts the recessed portion of the friction ring 7 to move the friction ring if necessary to accommodate any wear of the friction linings. During this braking operation, a clearance 16 is present at the outer side of the rings 7 and it is this clearance which determines the size of the clearance between the friction linings and the brake drum. The force required for the displacement of the rings 7 must be somewhat greater than the retraction force of the spring 18. Fig. 2 illustrates the position of the parts of the wheel brake cylinder when the brake shoes are released. Alternative constructions are described but not illustrated in the Specification, e.g. the friction ring 7 may be directly mounted in a groove in the piston. Specification 726,548 is referred to.
GB284955A 1955-01-31 1955-01-31 Improvements in and relating to apparatus for the automatic adjustment of the clearance of brake-shoes Expired GB765823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB284955A GB765823A (en) 1955-01-31 1955-01-31 Improvements in and relating to apparatus for the automatic adjustment of the clearance of brake-shoes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB284955A GB765823A (en) 1955-01-31 1955-01-31 Improvements in and relating to apparatus for the automatic adjustment of the clearance of brake-shoes

Publications (1)

Publication Number Publication Date
GB765823A true GB765823A (en) 1957-01-16

Family

ID=9747120

Family Applications (1)

Application Number Title Priority Date Filing Date
GB284955A Expired GB765823A (en) 1955-01-31 1955-01-31 Improvements in and relating to apparatus for the automatic adjustment of the clearance of brake-shoes

Country Status (1)

Country Link
GB (1) GB765823A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183309A (en) * 1985-11-21 1987-06-03 Lucas Ind Plc Improvements in self-energising disc brakes
GB2233054A (en) * 1989-05-11 1991-01-02 Bendix Altecna Spa Wheel cylinder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183309A (en) * 1985-11-21 1987-06-03 Lucas Ind Plc Improvements in self-energising disc brakes
GB2233054A (en) * 1989-05-11 1991-01-02 Bendix Altecna Spa Wheel cylinder
GB2233054B (en) * 1989-05-11 1993-06-16 Bendix Altecna Spa Wheel cylinder

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