GB753554A - Adjusting device for servo brakes, in particular for motor vehicles - Google Patents
Adjusting device for servo brakes, in particular for motor vehiclesInfo
- Publication number
- GB753554A GB753554A GB26123/54A GB2612354A GB753554A GB 753554 A GB753554 A GB 753554A GB 26123/54 A GB26123/54 A GB 26123/54A GB 2612354 A GB2612354 A GB 2612354A GB 753554 A GB753554 A GB 753554A
- Authority
- GB
- United Kingdom
- Prior art keywords
- brake
- arms
- shoes
- shoe
- 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
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
- F16D51/50—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action with two linked or directly-interacting 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
- 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
- F16D65/565—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 diametrically opposite to service brake actuator, and subjected to service brake force
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
753,554. Internal shoe - drum brakes. PORSCHE, F. Sept. 9, 1954 [Nov. 28, 1953], No. 26123/54. Class 103 (1). In a servo brake, the floating brake shoes are supported indirectly through an adjustable abutment by means of two separate arms of different length which can swing round a common point of rotation. In the embodiment illustrated, the primary shoe 5 and the secondary shoe 6 are expanded against the action of return springs 7 by an expanding device 2 secured to the brake carrier plate 1. The shoes 5 and 6 are supported by means of arms 9, 10 and an adjustment device 11, having an adjusting nut 12 and adjusting screws 13, 131. The latter screws are provided with semispherical heads 15, 15<SP>1</SP> having two parallel flat surfaces to prevent rotation and are situated in complementary holes 17, 171 in the arms 9 and 10 respectively. Arm 9 is provided with forked extensions 21, 22 which serve as anchors for the lower return springs 7, and the arms 9 and 10 pivot on a pin 18 fixed to the brake carrier plate and are bent over towards the axis of the adjustment device 11 and are provided with curved application surfaces 20, 20<SP>1</SP> with which slide blocks 8, attached to the brake shoes 5, 6 are in contact. The arm 9 is shorter than the arm 10 so as to ensure that the force transmitted from the primary shoe 5 to the secondary shoe 6 is approximately half the force developed in the primary shoe 5 to ensure uniform wear of the brake linings 3 and 4. During braking action, servo action of the brake is obtained as the arms 9, 10, including the adjustment device 11, swing radially round the pin 18 corresponding to the direction of rotation. R. When braking ceases, the shoes are moved to their release position by return springs 7 and are straightened up through the arms 9 and 10 by a centralising spring 26. Adjustment of the brake shoes is achieved manually by turning the adjusting nut 12. A further embodiment is described in which automatic adjustment for brake lining wear is provided in the form of a ratchet and pawl mechanism.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE753554X | 1953-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB753554A true GB753554A (en) | 1956-07-25 |
Family
ID=6657474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26123/54A Expired GB753554A (en) | 1953-11-28 | 1954-09-09 | Adjusting device for servo brakes, in particular for motor vehicles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB753554A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3920764A1 (en) * | 1989-01-12 | 1991-01-03 | Teves Gmbh Alfred | Mechanically and/or hydraulically operated dual-servo drum brake - has automatic adjustment set by two adjusters working in conjunction with two springs |
-
1954
- 1954-09-09 GB GB26123/54A patent/GB753554A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3920764A1 (en) * | 1989-01-12 | 1991-01-03 | Teves Gmbh Alfred | Mechanically and/or hydraulically operated dual-servo drum brake - has automatic adjustment set by two adjusters working in conjunction with two springs |
| DE3920764C2 (en) * | 1989-01-12 | 2000-09-28 | Continental Teves Ag & Co Ohg | Automatic adjustment device for a duo-servo drum brake |
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