WO2016163974A1 - Automatic parking brake for truck mounted brake cylinder - Google Patents
Automatic parking brake for truck mounted brake cylinder Download PDFInfo
- Publication number
- WO2016163974A1 WO2016163974A1 PCT/US2015/024428 US2015024428W WO2016163974A1 WO 2016163974 A1 WO2016163974 A1 WO 2016163974A1 US 2015024428 W US2015024428 W US 2015024428W WO 2016163974 A1 WO2016163974 A1 WO 2016163974A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brake
- locking nut
- locking
- locking sleeve
- parking brake
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/08—Brake cylinders other than ultimate actuators
- B60T17/16—Locking of brake cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/665—Electrical control in fluid-pressure brake systems the systems being specially adapted for transferring two or more command signals, e.g. railway systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
- B60T7/128—Self-acting brakes of different types for railway vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H13/00—Actuating rail vehicle brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H13/00—Actuating rail vehicle brakes
- B61H13/02—Hand or other personal actuation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H13/00—Actuating rail vehicle brakes
- B61H13/34—Details
Definitions
- automatic parking brake system 10 is incorporated into a rail car braking system 34 by mounting brake cylinder 14 to a rail car truck 36 in the conventional manner.
- Hand brake lever 24 is interconnected by a chain 38 to a hand brake 40 having a user operable wheel 42 for manually taking up chain 38 and moving hand brake lever 24 to manually apply the rail car brakes.
- One or more manual release handles 44 are coupled via a cable 46 to chain 30 of manual release 28.
- a hydraulic cylinder may be used in lieu of hand brake 40 to hydraulically take up chain 38 and may include a slow bleed to relieve the pressure used to apply the brakes.
- rod 154 of parking brake cylinder 112 is coupled to mechanical parking brake lever 124 via a pivotal connection 104 and covered by a boot 106.
- mechanical parking brake lever 124 is connected to brake cylinder piston 190 via links 126 on the outside of non-pressure head 116 that are coupled to control rods 108 that extend into pressure cylinder 118 and are directly secured to piston 190.
- Parking brake cylinder 112 thus locks piston 190 from releasing the brakes by preventing hand brake lever 124 from pivoting and thus prevents piston 190 from moving to a brakes released position as control 108 cannot move if parking brake lever 124 is unable to move.
- Locking sleeve 160 is also coupled to a manual release stem 184 having an eccentric post 186 that, when rotated, will apply a force to a second shoulder 188 of locking sleeve 160 to move locking sleeve 160 axially out of engagement with locking nut 156.
- a spring 182 in housing 150 biases locking sleeve 160 into the engaged position.
- teeth 172 of locking nut 156 may be ramped to allow for ratcheting in one direction, thereby allowing rod 154 to translate through locking nut in one direction, but not the other.
- brake cylinder piston 190 can move into the brakes applied position even if locking sleeve 160 is engaged with locking nut 156, but rod 154 cannot move in the opposition direction so any brake application by piston 190 will be retained into the brakes applied position.
- locking sleeve 160 will engage locking nut 156 under the bias of spring 182 so that rod 154 is fixedly secured from translating through locking nut 156.
- Parking brake cylinder 1 12 will thus prevent brake cylinder piston 190 from returning the braking system to the brakes released position even if brake cylinder pressure is exhausted from inlet port 120.
- a threshold amount of brake pipe pressure is supplied to chamber 180, locking sleeve 160 will be forced out of engagement with locking nut 156 against the bias of spring 182 so that rod 154 is free to move and brake cylinder piston 190 can return to the brakes released position.
- brake cylinder pressure Prior to a service brake or emergency brake operation, brake cylinder pressure will nominally zero and the brake pipe pressure will be between 60 and 110 psig. Because of the brake pipe pressure, the locking mechanism of any parking brake cylinder described above will be disengaged. When the service brake or emergency brake is applied, the brake cylinder will apply the brakes and the parking brake cylinder will remain disengaged because the brake pipe pressure remains between 60 and 1 10 psig. If a parking brake operation is not desired, the service brake or emergency brake may be stopped by removing brake cylinder pressure, thus allowing the brake cylinder to return to the brakes released position as locking mechanism remains disengaged. If a parking brake operation is desired, brake pipe pressure is removed prior to removing brake cylinder pressure.
- brake pipe pressure allows any locking sleeve described above to move into engagement with the locking nut. If brake cylinder pressure is subsequently removed, the braking system will not return to the brakes released position because locking mechanism has engaged and parking brake cylinder prevents the brake cylinder piston or brake lever from moving back to a brakes released position. A subsequent application of brake pipe pressure will disengage the locking sleeve and locking nut, thereby releasing the parking brake so that the brakes may return to the released position.
- the parking brake may be manually released by using any of the manual release connections discussed above. Notably, the manual release may not be manually undone as only a brake application and the removal of brake pipe pressure can reset the locking mechanism of parking brake cylinder.
- an automatic parking brake system 310 may be configured to avoid undesirable high loading on a parking brake cylinder 312 and the pressure needed to release parking brake cylinder 312 if hand brake forces are added via mechanical parking brake lever 324.
- Mechanical parking brake lever 324 is pivotally mounted to non-pressure head 316 of brake cylinder 314 and coupled at one end 400 to brake cylinder piston inside pressure cylinder 318 via a pair of slotted links 402 on opposing sides of non-pressure head 316. As previously seen in Fig.
- hand brake lever 324 could also contact and move cam 416 via a push rod 430 that is contacted by a shoulder 434 on hand brake lever 324.
- Push rod 430 is biased by a spring 432 so that push rod 430 will move out of engagement with cam 416 if hand brake lever 324 moves to the released position.
- manual release 328 could include a parking brake chain lever 440 that is interconnected to chain 38 via a spring so that when lever 440 is moved and manual release 328 is rotated when chain 38 is taken up by a hand brake 40.
- Locking mechanism 352 includes a locking nut 356 that is held within housing 350 by a thrust bearing 358 and coupled to rod 354 by corresponding high helix threads to that nut 356 will rotate if rod 354 translates through nut 356.
- Locking mechanism 352 further comprises a locking sleeve 360 positioned in housing 350 for axial, but not rotational, movement.
- sleeve 360 may be held within housing 350 by one or more pins 362 seated in grooves 364 and 366 formed in sleeve 360 and housing 350, respectively, so that sleeve 360 cannot rotate but can move axially within housing 350.
- Locking sleeve 360 may move axially within housing 350 from a first position, where locking sleeve 360 is disengaged from locking nut 356 and a second position, wherein locking sleeve 360 is engaged with locking nut 356.
- the leading edge of locking sleeve 360 includes teeth 370 that engage with corresponding teeth 372 on the trailing edge of locking nut 356.
- a spring 382 in housing 350 biases locking sleeve 360 into the engaged position in the absence of sufficient brake pipe pressure in chamber assembly 380.
- Locking sleeve 360 is also coupled to a manual release stem 384 that extends out of housing 350 to form manual release 328.
- Stem 384 includes an eccentric post 386 that, when rotated, will engage a shoulder 388 on sleeve 360 to move locking sleeve 360 out of engagement with locking nut 356 against the bias of spring 382. Parking brake cylinder 312 will thus prevent brake cylinder 314 from returning to the brakes released position even if brake cylinder pressure is exhausted from inlet port 320.
- the release pressure threshold may be verified by initiating an emergency brake application from the initial brake pipe charge as indicated in Table 2.
- the hand brake may then be fully applied so that 3,350 lbs. of force has been generated in the vertical chain.
- the hand brake may then be released and, using the manual release feature of a brake control valve, the pneumatic brake application may be released.
- the brake pipe may then be recharged to ensure that the automatic parking brake system at or below the listed value.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Braking Elements And Transmission Devices (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2015/024428 WO2016163974A1 (en) | 2015-04-06 | 2015-04-06 | Automatic parking brake for truck mounted brake cylinder |
AU2015390223A AU2015390223B2 (en) | 2015-04-06 | 2015-04-06 | Automatic parking brake for truck mounted brake cylinder |
BR112017020979A BR112017020979A2 (en) | 2015-04-06 | 2015-04-06 | automatic parking brake for truck mounted brake cylinder |
CA2981812A CA2981812C (en) | 2015-04-06 | 2015-04-06 | Automatic parking brake for truck mounted brake cylinder |
CN201580080476.3A CN107667045A (en) | 2015-04-06 | 2015-04-06 | Automatic parking brake for the checking cylinder of bogie mounting |
ZA2017/06483A ZA201706483B (en) | 2015-04-06 | 2017-09-26 | Automatic parking brake for truck mounted brake cylinder |
AU2018200798A AU2018200798B2 (en) | 2015-04-06 | 2018-02-02 | Automatic parking brake for truck mounted brake cylinder |
AU2019202555A AU2019202555A1 (en) | 2015-04-06 | 2019-04-12 | Automatic parking brake for truck mounted brake cylinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2015/024428 WO2016163974A1 (en) | 2015-04-06 | 2015-04-06 | Automatic parking brake for truck mounted brake cylinder |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016163974A1 true WO2016163974A1 (en) | 2016-10-13 |
Family
ID=52829495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2015/024428 WO2016163974A1 (en) | 2015-04-06 | 2015-04-06 | Automatic parking brake for truck mounted brake cylinder |
Country Status (6)
Country | Link |
---|---|
CN (1) | CN107667045A (en) |
AU (3) | AU2015390223B2 (en) |
BR (1) | BR112017020979A2 (en) |
CA (1) | CA2981812C (en) |
WO (1) | WO2016163974A1 (en) |
ZA (1) | ZA201706483B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201800010349A1 (en) | 2018-11-15 | 2020-05-15 | Faiveley Transport Italia Spa | Electronic brake control system of a railway vehicle |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2616851A1 (en) * | 1976-04-15 | 1977-11-03 | Knorr Bremse Gmbh | BRAKE SYSTEM FOR VEHICLES |
US20080251327A1 (en) * | 2004-01-08 | 2008-10-16 | New York Air Brake Corporation | Parking Brake System Including A Brake Cylinder |
EP2826684A1 (en) * | 2013-07-17 | 2015-01-21 | Faiveley Transport Amiens | Railway brake system and braking method of a railway vehicle comprising such a system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6279689B1 (en) * | 1999-01-20 | 2001-08-28 | Westinghouse Air Brake Company | Hydraulic parking brake for a railroad vehicle braking system |
US6431329B1 (en) * | 2000-09-14 | 2002-08-13 | New York Air Brake Corporation | Fluid parking brake for a rail vehicle air brake cylinder |
US7249659B2 (en) * | 2004-01-08 | 2007-07-31 | New York Air Brake Corporation | Fluid actuator |
-
2015
- 2015-04-06 BR BR112017020979A patent/BR112017020979A2/en not_active Application Discontinuation
- 2015-04-06 WO PCT/US2015/024428 patent/WO2016163974A1/en active Application Filing
- 2015-04-06 CN CN201580080476.3A patent/CN107667045A/en active Pending
- 2015-04-06 AU AU2015390223A patent/AU2015390223B2/en not_active Ceased
- 2015-04-06 CA CA2981812A patent/CA2981812C/en not_active Expired - Fee Related
-
2017
- 2017-09-26 ZA ZA2017/06483A patent/ZA201706483B/en unknown
-
2018
- 2018-02-02 AU AU2018200798A patent/AU2018200798B2/en not_active Ceased
-
2019
- 2019-04-12 AU AU2019202555A patent/AU2019202555A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2616851A1 (en) * | 1976-04-15 | 1977-11-03 | Knorr Bremse Gmbh | BRAKE SYSTEM FOR VEHICLES |
US20080251327A1 (en) * | 2004-01-08 | 2008-10-16 | New York Air Brake Corporation | Parking Brake System Including A Brake Cylinder |
EP2826684A1 (en) * | 2013-07-17 | 2015-01-21 | Faiveley Transport Amiens | Railway brake system and braking method of a railway vehicle comprising such a system |
Also Published As
Publication number | Publication date |
---|---|
AU2015390223B2 (en) | 2017-12-14 |
AU2018200798B2 (en) | 2019-03-21 |
CA2981812C (en) | 2018-08-07 |
AU2019202555A1 (en) | 2019-05-02 |
CN107667045A (en) | 2018-02-06 |
CA2981812A1 (en) | 2016-10-13 |
AU2015390223A1 (en) | 2017-10-26 |
ZA201706483B (en) | 2019-04-24 |
BR112017020979A2 (en) | 2018-07-10 |
AU2018200798A1 (en) | 2018-02-22 |
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