GB1427521A - Shoe drum brakes for vehicles - Google Patents
Shoe drum brakes for vehiclesInfo
- Publication number
- GB1427521A GB1427521A GB2082072A GB2082072A GB1427521A GB 1427521 A GB1427521 A GB 1427521A GB 2082072 A GB2082072 A GB 2082072A GB 2082072 A GB2082072 A GB 2082072A GB 1427521 A GB1427521 A GB 1427521A
- Authority
- GB
- United Kingdom
- Prior art keywords
- actuator
- shoes
- brake
- shoe
- parking
- 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
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
- F16D65/56—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
- F16D65/562—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 between service brake actuator and braking member, and 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
- 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
-
- 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
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
- F16D65/09—Pivots or supporting members therefor
- F16D65/091—Pivots or supporting members therefor for axially holding the segments
-
- 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
-
- 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
- F16D2125/68—Lever-link mechanisms, e.g. toggles with change of force ratio
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
1427521 Shoe drum brakes GIRLING Ltd 2 May 1973 [4 May 1972] 20820/72 Heading F2E In an internal shoe drum brake wherein arcuate shoes 1, 2 mounted on a stationary back-plate 4 are separated, by a service actuator 7, at one pair of adjacent ends thereof to bring them into engagement with a rotatable drum and at the other pair of adjacent ends by a mechanical parking actuator 10, and abutments are provided at the actuator 10 to take the braking loads when the brake is applied by the service actuator, and means are provided in or adjacent the service actuator for transmitting servo braking forces from one shoe to the other when the brake is applied by the mechanical parking actuator, the said other end of each shoe has first and second load bearing faces 2a, 3a and 2b, 3b, and the parking actuator incorporates expander means, i.e. tappets 8, 9, acting directly on the load bearing faces 3a, 2a. The abutments, i.e. the opposite ends of the housing of the actuator 10, are independent of the tappets 8, 9 and are engageable by the load bearing faces 2b, 3b when the brake is applied by the service actuator 7 so that braking forces on the shoes are taken directly by the abutments independently of the tappets when the brake is applied by the actuator 7. A force is applied to the shoes by the release of energy stored in the parking actuator upon operation of an actuating member, and the force is applied continuously to urge the shoes into engagement with the drum when the actuating member is operated irrespective of the initial position of the shoes. As shown, the parking actuator comprises a normally retracted plunger 13 acted upon by a spring 16 and which, when released, acts through a wedge 12 and rollers 11, to spread apart the shoes 1, 2. The servo force is applied from one shoe to the other during a parking application of the brake by a strut extending between the shoes or through the pistons 18, 19 of the actuator 7. The latter includes provision for automatic slack adjustment comprising a spindle 20 one end of which is in screw-threaded engagement with the piston 18, the other end of the spindle being a sliding fit in the piston 19 and carrying a drive ring 24 urged by a spring 25 into clutching engagement with a coned surface 26 on the piston 19. During service actuation when the pistons 18, 19 are moved apart more than a predetermined amount the drive ring 24 is moved away from the piston 19 to reduce the clutching force and rotates as the spindle moves axially therethrough thereby automatically increasing the distance between the pistons. In a modification, the parking actuator comprises toggle members (29), (30), Fig. 5 (not shown), in rocking abutment with a recess (31) in the plunger 13 which, for actuation thereof, is connected by a cable or rod extending via a bell-crank lever (37), Fig. 6 (not shown), to either a hand lever working in a gate or a hand lever carrying a pawl working over a toothed segment; the plunger may be released by air pressure or applied by fluid pressure with a reserve or back-up pressure accumulator.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2082072A GB1427521A (en) | 1972-05-04 | 1972-05-04 | Shoe drum brakes for vehicles |
IN1038/CAL/73A IN140063B (en) | 1972-05-04 | 1973-05-03 | |
FR7315897A FR2183503A5 (en) | 1972-05-04 | 1973-05-03 | |
DE19732322592 DE2322592A1 (en) | 1972-05-04 | 1973-05-04 | DRUM BRAKE, ESPECIALLY FOR MOTOR VEHICLES |
JP4921773A JPS4954775A (en) | 1972-05-04 | 1973-05-04 | |
US05/613,328 US3977500A (en) | 1972-05-04 | 1975-09-15 | Shoe drum brakes for vehicles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2082072A GB1427521A (en) | 1972-05-04 | 1972-05-04 | Shoe drum brakes for vehicles |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1427521A true GB1427521A (en) | 1976-03-10 |
Family
ID=10152249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2082072A Expired GB1427521A (en) | 1972-05-04 | 1972-05-04 | Shoe drum brakes for vehicles |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS4954775A (en) |
DE (1) | DE2322592A1 (en) |
FR (1) | FR2183503A5 (en) |
GB (1) | GB1427521A (en) |
IN (1) | IN140063B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2168770A (en) * | 1984-11-29 | 1986-06-25 | Weber Spa | A system for automatic wear compensation inserted in a hydraulic unit actuating a drum brake |
CN107339340A (en) * | 2017-08-15 | 2017-11-10 | 霸州市华诚汽车制动器有限公司 | A kind of drum brake |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5635825A (en) * | 1979-08-31 | 1981-04-08 | Lucas Industries Ltd | Inner shoe drum brake for vehicle |
DE3026938A1 (en) * | 1980-07-16 | 1982-02-04 | Deutsche Perrot-Bremse Gmbh, 6800 Mannheim | INNER JAW DRUM BRAKE |
DE3923375C1 (en) * | 1989-07-14 | 1990-11-15 | Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
DE19846420A1 (en) * | 1998-10-08 | 2000-04-13 | Volkswagen Ag | Drum brake for a motor vehicle |
-
1972
- 1972-05-04 GB GB2082072A patent/GB1427521A/en not_active Expired
-
1973
- 1973-05-03 IN IN1038/CAL/73A patent/IN140063B/en unknown
- 1973-05-03 FR FR7315897A patent/FR2183503A5/fr not_active Expired
- 1973-05-04 JP JP4921773A patent/JPS4954775A/ja active Pending
- 1973-05-04 DE DE19732322592 patent/DE2322592A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2168770A (en) * | 1984-11-29 | 1986-06-25 | Weber Spa | A system for automatic wear compensation inserted in a hydraulic unit actuating a drum brake |
CN107339340A (en) * | 2017-08-15 | 2017-11-10 | 霸州市华诚汽车制动器有限公司 | A kind of drum brake |
Also Published As
Publication number | Publication date |
---|---|
IN140063B (en) | 1976-09-04 |
JPS4954775A (en) | 1974-05-28 |
FR2183503A5 (en) | 1973-12-14 |
DE2322592A1 (en) | 1973-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19930501 |