EP2307757A1 - Automatic slack adjuster for a brake lever - Google Patents
Automatic slack adjuster for a brake leverInfo
- Publication number
- EP2307757A1 EP2307757A1 EP09788678A EP09788678A EP2307757A1 EP 2307757 A1 EP2307757 A1 EP 2307757A1 EP 09788678 A EP09788678 A EP 09788678A EP 09788678 A EP09788678 A EP 09788678A EP 2307757 A1 EP2307757 A1 EP 2307757A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brake
- request
- gear
- helix
- motion
- 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.)
- Withdrawn
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
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
- F16D65/60—Slack adjusters mechanical self-acting in one direction for adjusting excessive play for angular adjustment of two concentric parts of the brake control systems
Definitions
- TECHNICAL AREA Invention is related to functional full automatic brake gap adjuster that is usually fastened to the edge of S-camshaft in drum brake systems of heavy vehicles and connected to the push rod of air bellows.
- Automatic brake adjusters are produced due to equipping vehicles with some specifications.
- Automatic brake adjusters both act as manual brake adjusters and automatically keep constant the excessive gap caused by abrasion of lining, and until lining finishes, brake cylinder shaft's stroke remains in adjusted distance, so it's put on safe brake. With automatic brake adjuster, extra time loss and service cost will be removed.
- Functional full automatic brake gap adjuster consists of a worm reel that's placed inside body in rotating position and has internal cams to be attached to S-camshaft; a worm shaft that is vertically placed on worm reel and operates concurrent with the worm reel; a disc spring that can transmit control motion with angular movement of gap adjuster to the clutch that can pivot on endless shaft and that has a normal power; and also a control system that sets up clutch with endless shaft kept under pressure.
- Control system includes a control disc that can be connected to control ring which has a control lever to form a reference point with a part constantly connected to vehicle chassis and a control disc that can rotate co-axial to endless reel; a pinion that is paired with internal threads of control disc, a conveyor/carrying gear and control screw, two parts co-axial to pinion and a final part connecting with clutch gear and threads where axis of worm shaft is perpendicular to pinion's axis; and also carrying reel and control screw
- Our invention removed disadvantages experienced by known techniques by using disc spring which provides advantages due to linear load compression and service life that's used in automotive and machinery sector. Repair kit is completely steel and these steels' resistance was increased by heat-treatment. Also, as repair kit used fewer, it provides easy production and assembly. Thus, it provides time and energy saving.
- brake cylinder's push rod angularly rotates gap adjuster with pressure air entering into brake cylinder.
- s-camshaft rotates cams by turning, so cams open the brake shoes and provides brake linings to press on drum. In this way, it's put on the brake.
- DETAILED EXPLANATION OF INVENTION Invention consists of body (1), worm reel (2), worm shaft (3), Z 18xM
- Automatic brake gap adjuster consists of an worm reel (2) that's placed inside body (1) in rotating position and has internal cams to be attached to S- camshaft; an worm shaft (3) that is vertically placed on worm reel (2) and operates concurrent with the worm reel (2); a disc spring (13) that can transmit control motion with angular movement of gap adjuster to the clutch that can pivot on worm shaft (3) and that has a normal power; and also a control system that sets up clutch with endless shaft kept under pressure.
- Control system includes a control disc that can be connected to control ring which has a control lever (21) to form a reference point with a part constantly connected to vehicle chassis and a control disc that can rotate co-axial to endless reel; a pinion that is paired with internal threads of control disc, a conveyor/carrying gear and control screw, two parts co-axial to pinion and a final part connecting with clutch gear and threads where axis of worm shaft is perpendicular to pinion's axis; and also carrying reel and control screw
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The Invention is related to a functional full automatic brake gap adjuster that is usually fastened to the edge of S-camshaft in drum brake systems of heavy vehicles and connected to the push rod of a brake cylinder. When brake pedal is pressed, the brake cylinder's push rod angularly rotates the gap adjuster -when pressurised air is entering into the brake cylinder. With this motion, the s-camshaft rotates cams by turning, so that cams open the brake shoes and provides brake linings to press again
Description
DESCRIPTION
AUTOMATIC SLACK ADJUSTER FOR A BRAKE LEVER
TECHNICAL AREA Invention; is related to functional full automatic brake gap adjuster that is usually fastened to the edge of S-camshaft in drum brake systems of heavy vehicles and connected to the push rod of air bellows.
PREVIOUS TECHNIQUE Manual brake adjusters from known brake technologies only acts as connecting part fixed to brake cylinder and to s-camshaft, but as a result of abrasion according to brake linings type used on vehicle, gap between brake drum and brake lining increases and pusher rod stroke of brake cylinder becomes insufficient as to abrasion condition of lining. Therefore, it's not put on safe brake. Brake adjustments of vehicle is normalized by getting under the vehicle once a week in average due to eexcessive gap caused by abrasion of lining. This is an additional cost due to extra time loss and service cost
As a result of rapid advancement of technology and as time's gaining importance, automatic brake adjusters are produced due to equipping vehicles with some specifications. Automatic brake adjusters both act as manual brake adjusters and automatically keep constant the excessive gap caused by abrasion of lining, and until lining finishes, brake cylinder shaft's stroke remains in adjusted distance, so it's put on safe brake. With automatic brake adjuster, extra time loss and service cost will be removed.
With the brake mechanism applied by HALDEX AB in 25.04.1994 and mentioned in patent specification no: EP0598290 and with production of auomatic brake adjuster that can operate180 °, a new period started in brake adjusters. As a result of examinations performed by our specialists, disadvantages taking place in said brake adjusters have been determined and solutions have been produced.
Disadvantages determined are as following:
• Because of excessiveness of product parts and due to difficulty in production and assembling, it causes time loss.
• Because working parts used in brake adjusters are made of powder metal, a disadvantage occurs in performance point of brake adjuster and in materials' resistance.
• In existing system, 2.5 mm bake-up washer and winding compression spring is used. As a result of decline of winding compression spring used, brake and contortion of back-up washer, it causes 18 Nm. decline of torque which is required to be continuous in brake adjuster.
BRIEF EXPLANATION OF INVENTION
Functional full automatic brake gap adjuster consists of a worm reel that's placed inside body in rotating position and has internal cams to be attached to S-camshaft; a worm shaft that is vertically placed on worm reel and operates concurrent with the worm reel; a disc spring that can transmit control motion with angular movement of gap adjuster to the clutch that can pivot on endless shaft and that has a normal power; and also a control system that sets up clutch with endless shaft kept under pressure.
Control system includes a control disc that can be connected to control ring which has a control lever to form a reference point with a part constantly connected to vehicle chassis and a control disc that can rotate co-axial to endless reel; a pinion that is paired with internal threads of control disc, a conveyor/carrying gear and control screw, two parts co-axial to pinion and a final part connecting with clutch gear and threads where axis of worm shaft is perpendicular to pinion's axis; and also carrying reel and control screw
Our invention removed disadvantages experienced by known techniques by using disc spring which provides advantages due to linear load compression and service life that's used in automotive and machinery sector. Repair kit is completely steel and these steels' resistance was increased by heat-treatment. Also, as repair kit used fewer, it provides easy production and assembly. Thus, it provides time and energy saving.
When brake pedal is pressed, brake cylinder's push rod angularly rotates gap adjuster with pressure air entering into brake cylinder. With this motion, s-camshaft rotates cams by turning, so cams open the brake shoes and provides brake linings to press on drum. In this way, it's put on the brake.
MEANINGS OF FIGURES
Figure 1. Mounted View of System Figure 2 Dismantled View of System Figure 3 Dismantled View of System
Figure 4 Control System Answers of part numbers specified in pictures are given below
1. Body
2. Worm ReIl 3. Worm Shaft
4. Z 18xM 1.25-Z1 3 Helix worm gear
5. M 38 Short Plug
6. Front roller bearing
7. Z 90 torsion gear 8. Torsion spring
9. Z 16xZ1 3 Helix worm gear
10. Bearing Bush
11. Steel ball
12. Brake block 13. Disc Spring
14. M 38 Long Plug
15. Rivet
16. Shaft O-ring 17. Reel O-ring
18. Screw
19. Grease fitting 20. Cover Plate
21. Control Lever
22. Z 41 Driving Gear
DETAILED EXPLANATION OF INVENTION Invention consists of body (1), worm reel (2), worm shaft (3), Z 18xM
1.25-Z1 3 Helix worm gear (4), M 38 Short Plug (5), Front roller bearing (6), Z 90 torsion gear (7), torsion spring (8), Z 16xZ1 3 Helix worm gear (9), Bearing Bush (10), steel ball (11), brake block (12), disc spring (13), M 38 long plug(14), rivet (15), Shaft O-ring (16), Reel O-ring (17), Screw (18), Grease fitting (19), Cover Plate (20), Control Lever (21) and Z 41 Driving Gear (22) parts. Automatic brake gap adjuster consists of an worm reel (2) that's placed inside body (1) in rotating position and has internal cams to be attached to S- camshaft; an worm shaft (3) that is vertically placed on worm reel (2) and operates concurrent with the worm reel (2); a disc spring (13) that can transmit control motion with angular movement of gap adjuster to the clutch that can pivot on worm shaft (3) and that has a normal power; and also a control system that sets up clutch with endless shaft kept under pressure. Control system includes a control disc that can be connected to control ring which has a control lever (21) to form a reference point with a part constantly connected to vehicle chassis and a control disc that can rotate co-axial to endless reel; a pinion that is paired with internal threads of control disc, a conveyor/carrying gear and control screw, two parts co-axial to pinion and a final part connecting with clutch gear and threads where axis of worm shaft is perpendicular to pinion's axis; and also carrying reel and control screw
Claims
1. It's functional full automatic brake gap adjuster and characterized by body(1), worm reel (2), worm shaft (3), Z 18xM 1.25-Z1 3 Helix worm gear (4), M 38 Short Plug (5), Front roller bearing (6), Z 90 torsion gear(7), torsion spring (8), Z 16xZ1 3 Helix worm gear (9), Bearing Bush(10), steel ball (11), brake block (12), disc spring (13), M 38 long plug (14), rivet (15), Shaft O-ring (16), Reel O-ring (17), Screw (18), Grease fitting (19), Cover Plate (20), Control Lever (21) and Z 41 Driving " Gear(22) parts.
2. Thing mentioned in Request 1 is a functional full automatic brake gap adjuster and characterized as following; during brake, it transmits motion coming to control lever (21) which is fixed on vehicle being pushed by bellows to the Z 18xM 1.25-Z1 3 helix worm gear (4) and it transmits motion to the Z 16xZ1 3 Helix worm gear (9) by rotating co-axially.
3. Thing mentioned in Request 1 and Request 2 is a functional full automatic brake gap adjuster and characterized as following; during brake, it provides idle motion that comes to Z 16xZ1 3 Helix worm gear
(9) by means of torsion spring.
4. Thing mentioned in Request 1 , Request 2 and Request 3 is a functional full automatic brake gap adjuster and characterized as following; it transmits circular motion to the helix worm gera (9) that occurs co-axial motion of Z 18xM 1.25-Z1 3 helix worm gear (4) from control system during turning the lever back after braking, and gives coming motion to Z90 torsion gear (7) where Z 16xZ1 3 Helix worm gear (9) torsion spring (8) is locked.
5. Thing mentioned in Request 1 , Request 2 , Request 3 and Request 4 is a functional full automatic brake gap adjuster and characterized as following; it provides clutch of gears on Z90 torsion gear (7) and worm shaft (3) each other, by aligning disc springs on brake block and mounting steel ball to the brake block (12) and continuously making pressure through M38 long plug.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2008/05758A TR200805758A2 (en) | 2008-08-05 | 2008-08-05 | FUNCTIONAL FULL AUTOMATIC BRAKE SPEED ADJUSTMENT |
| PCT/TR2009/000096 WO2010016812A1 (en) | 2008-08-05 | 2009-08-04 | Automatic slack adjuster for a brake lever |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2307757A1 true EP2307757A1 (en) | 2011-04-13 |
Family
ID=41162442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09788678A Withdrawn EP2307757A1 (en) | 2008-08-05 | 2009-08-04 | Automatic slack adjuster for a brake lever |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2307757A1 (en) |
| TR (1) | TR200805758A2 (en) |
| WO (1) | WO2010016812A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202011106746U1 (en) * | 2011-10-14 | 2011-12-05 | Haldex Brake Products Ab | Brake lever for a drum brake |
| EP3093518B2 (en) | 2015-05-11 | 2022-01-12 | ZF CV Systems Europe BV | Readjustment unit for an automatic rod positioner |
| CN105864325B (en) * | 2016-06-22 | 2018-09-25 | 诸暨市辉邦科技有限公司 | The braking adjusting-arm of plum blossom toothing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1532857A (en) * | 1966-08-03 | 1968-07-12 | Westinghouse Bremsen Apparate | Device for automatic readjustment of the camshaft lever of a brake |
| GB1189319A (en) * | 1967-10-31 | 1970-04-22 | Westinghouse Brake & Signal | Automatic Slack Adjusters |
| SE470526B (en) | 1992-11-18 | 1994-07-04 | Haldex Ab | Brake lever for an S-cam brake on a road vehicle |
| CN100455840C (en) * | 2004-04-07 | 2009-01-28 | 马德拉斯机器制造私人有限公司 | Automatic brake slack adjuster for adjusting the slack between a brake lining and a brake drum of a vehicle brake system |
| US20070012529A1 (en) * | 2005-07-18 | 2007-01-18 | Kreidler Kevin L | Automatic slack adjuster |
-
2008
- 2008-08-05 TR TR2008/05758A patent/TR200805758A2/en unknown
-
2009
- 2009-08-04 EP EP09788678A patent/EP2307757A1/en not_active Withdrawn
- 2009-08-04 WO PCT/TR2009/000096 patent/WO2010016812A1/en not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010016812A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| TR200805758A2 (en) | 2009-04-21 |
| WO2010016812A1 (en) | 2010-02-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20101013 |
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| AK | Designated contracting states |
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| AX | Request for extension of the european patent |
Extension state: AL BA RS |
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| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20150303 |