WO2003080418A1 - Spring brake actuator which accomodates double o-ring on its adapter plate for improved sealing - Google Patents

Spring brake actuator which accomodates double o-ring on its adapter plate for improved sealing Download PDF

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Publication number
WO2003080418A1
WO2003080418A1 PCT/TR2002/000036 TR0200036W WO03080418A1 WO 2003080418 A1 WO2003080418 A1 WO 2003080418A1 TR 0200036 W TR0200036 W TR 0200036W WO 03080418 A1 WO03080418 A1 WO 03080418A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
adapter plate
spring
brake actuator
chamber
Prior art date
Application number
PCT/TR2002/000036
Other languages
French (fr)
Inventor
Ahmet Arkan
Serkan Bilsen
Ahmet Akin
Original Assignee
Arfesan Arkan Fren Elemanlari San. Ve Tic. A.S.
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 Arfesan Arkan Fren Elemanlari San. Ve Tic. A.S. filed Critical Arfesan Arkan Fren Elemanlari San. Ve Tic. A.S.
Priority to AU2002324415A priority Critical patent/AU2002324415A1/en
Publication of WO2003080418A1 publication Critical patent/WO2003080418A1/en

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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
    • B60T17/083—Combination of service brake actuators with spring loaded brake actuators

Definitions

  • This invention is about the spring brake actuator, which provides the braking power in highway vehicles used for commercial transportation such as trucks, busses and trailers.
  • the spring brake actuator which is the subject of this invention, is composed of two chambers: the “Service Brake Chamber” which operates when the vehicle is in action and the “Spring Chamber” which operates when the vehicle is parked.
  • the Service Brake Chamber and the Spring Chamber in spring brake actuators operate with pressurized air coming from different lines and are controlled by various valves in the cab.
  • the subject of this invention contaminants such as chips, burr, and dye particles from the internal parts get caught between the aluminum pipe and the O-ring in time and cause the sealing characteristic to disappear and result in air leakage. Furthermore, the system which is greased during installation loses its lubrication in time causing the O-ring to abrade and rotate in its slot. When parts shrink and harden in excessively cold temperatures the sealing system loses its property. Due to the facts stated above air leakage occurs in the system and the brake element, which is a vital element, faces failures which require immediate repair.
  • the spring brake actuator which accomodates double o-ring on its adapter plate aims to prevent or minimize probable ail eakage due to any reason occuring in the area between the "Service Brake Chamber” and the "Spring Chamber.”
  • Figure 1 Sectional view of the spring brake actuator produced according to prior art.
  • Figure 2 Sectional view of the spring brake actuator developed by this invention.
  • FIG 3 Sectional view of the adapter plate produced according to prior art.
  • Figure 4 Sectional view of the adapter plate developed by this invention.
  • the parts have been given numbers, and the definition of the numbers are as follows: 1.
  • the spring brake actuators which accommodate double O-ring on their adapter plates for improved sealing developed by this invention are composed of the following main elements: adapter plate (4), guide ring (5), spring chamber (6), service brake chamber (7), first O-ring groove (8), second O-ring groove (9), guide ring groove (10), area between O-rings (11), and second O-ring (12).
  • the aluminium piston (1) and the aluminium pipe (2) in the spring brake actuators which accommodate double O-ring in their adapter plates for improved sealing developed by this invention are guided and move freely.
  • the surface of the aluminium pipe is covered with eloxal and is smooth.
  • the aluminium pipe (2) and the O-ring (3) provide a sealing system and prevent the transfer of pressurized air between the spring chamber (6) and the service brake chamber (7).
  • the guide ring (5) ensures proper operation of the sealing system by centring and guiding the complete piston unit which is formed by aluminium piston (1) and aluminium pipe (2).
  • One of the O-rings (3) is placed in the side of the Spring Chamber (6) and the other (12) in the side of the Service Brake Chamber (7).
  • each brake chamber is held by the sealing provided by the O-ring next to them.
  • the O-rings (3 and 12) are placed in the O-ring grooves (8 and 9) machined on the adapter plate (4). If a problem occurs in one of the O-rings, sealing is provided by the other O-ring as in the case of the brake actuators produced according to prior art.
  • the double O-ring system in the spring brake actuators which accommodate double O-ring in their adapter plates developed by this invention provides enhanced safety.
  • Grease put in the area (11) between the two O-ring systems (8, 9, 3 and 12) provides long time lubrication of the system since this area is closed at both ends thereby preventing shrinkage and failure resulting from the lack of grease.

Landscapes

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

Abstract

The present invention concerns spring brake actuators, which provide braking power for motorway vehicles used in commercial transportation such as trucks, busses and trailers.The spring brake actuator, which is the subject of this invention, is composed of the 'Service Brake Chamber' which operates when the vehicle is in action and the 'Spring Chamber' which operates when the vehicle is parked.The spring brake actuator, which accommodates double O-ring in its adapter plate for improved sealing, consists of the main elements of adapter plate (4), guide ring (5), spring chamber (6), service brake chamber (7), first O-ring groove (8), second O-ring groove (9), guide ring groove (10), area between O-rings (11) and the second O-ring (12).

Description

SPRING BRAKE ACTUATOR WHICH ACCOMMODATES DOUBLE O-RING ON ITS ADAPTER PLATE FOR IMPROVED SEALING
This invention is about the spring brake actuator, which provides the braking power in highway vehicles used for commercial transportation such as trucks, busses and trailers.
The spring brake actuator, which is the subject of this invention, is composed of two chambers: the "Service Brake Chamber" which operates when the vehicle is in action and the "Spring Chamber" which operates when the vehicle is parked. The Service Brake Chamber and the Spring Chamber in spring brake actuators operate with pressurized air coming from different lines and are controlled by various valves in the cab.
In the spring brake actuators, the subject of this invention, contaminants such as chips, burr, and dye particles from the internal parts get caught between the aluminum pipe and the O-ring in time and cause the sealing characteristic to disappear and result in air leakage. Furthermore, the system which is greased during installation loses its lubrication in time causing the O-ring to abrade and rotate in its slot. When parts shrink and harden in excessively cold temperatures the sealing system loses its property. Due to the facts stated above air leakage occurs in the system and the brake element, which is a vital element, faces failures which require immediate repair.
In the spring brake actuators, the subject of this invention, produced according to prior art there is one "O-ring" and one "Guide ring" in the core of the adapter plates.
The spring brake actuator which accomodates double o-ring on its adapter plate aims to prevent or minimize probable ail eakage due to any reason occuring in the area between the "Service Brake Chamber" and the "Spring Chamber."
In order to fulfil this aim, double "O-ring" and a single "Guide ring" is used instead of the single "O-ring" and "Guide ring" on the core of the adapter plates in the spring brake actuators produced according to prior art. Thus, the risks mentioned above have been reduced to a great extent. The illustrations (figures) in order to aid in the understanding of the spring brake actuators which accommodate double O-ring on their adapter plates are provided in the annex. The definitions of the figures are as follows:
Figure 1 - Sectional view of the spring brake actuator produced according to prior art. Figure 2 - Sectional view of the spring brake actuator developed by this invention.
Figure 3 - Sectional view of the adapter plate produced according to prior art. Figure 4 - Sectional view of the adapter plate developed by this invention. For a better understanding of the illustrations (figures) related to the spring brake actuators which accommodate double O-ring on their adapter plates for improved sealing developed by this invention the parts have been given numbers, and the definition of the numbers are as follows: 1. Aluminum piston
2. Aluminum pipe
3. O-Ring
4. Adapter plate
5. Guide ring 6. Spring Chamber
7. Service Brake Chamber
8. First O-Ring Channel
9. Second O-Ring Groove
10. Guide ring Groove 11. Area between O-rings
12. Second O-Ring
The spring brake actuators which accommodate double O-ring on their adapter plates for improved sealing developed by this invention are composed of the following main elements: adapter plate (4), guide ring (5), spring chamber (6), service brake chamber (7), first O-ring groove (8), second O-ring groove (9), guide ring groove (10), area between O-rings (11), and second O-ring (12).
The aluminium piston (1) and the aluminium pipe (2) in the spring brake actuators which accommodate double O-ring in their adapter plates for improved sealing developed by this invention are guided and move freely. The surface of the aluminium pipe is covered with eloxal and is smooth. The aluminium pipe (2) and the O-ring (3) provide a sealing system and prevent the transfer of pressurized air between the spring chamber (6) and the service brake chamber (7). The guide ring (5) ensures proper operation of the sealing system by centring and guiding the complete piston unit which is formed by aluminium piston (1) and aluminium pipe (2). One of the O-rings (3) is placed in the side of the Spring Chamber (6) and the other (12) in the side of the Service Brake Chamber (7). The pressure in each brake chamber is held by the sealing provided by the O-ring next to them. The O-rings (3 and 12) are placed in the O-ring grooves (8 and 9) machined on the adapter plate (4). If a problem occurs in one of the O-rings, sealing is provided by the other O-ring as in the case of the brake actuators produced according to prior art. The double O-ring system in the spring brake actuators which accommodate double O-ring in their adapter plates developed by this invention provides enhanced safety. Grease put in the area (11) between the two O-ring systems (8, 9, 3 and 12) provides long time lubrication of the system since this area is closed at both ends thereby preventing shrinkage and failure resulting from the lack of grease.
In the spring brake actuators which accommodate double O-ring in their adapter plates for improved sealing developed by this invention, air leakage in one of the O-rings due to shrinkage in the parts in excessively cold weather conditions or the hardening of the O-rings is prevented by the other O-ring. This further enhances the system safety.

Claims

CLAIMS - Spring brake actuator which accommodates double O-ring in its adapter plate for improved sealing consisting of the main elements of adapter plate (4), guide ring (5), spring chamber (6), service brake chamber (7), first O-ring groove (8), second O- ring groove (9), guide ring groove (10), area between O-rings (11) and the second
O-ring (12). - According to Claim 1 , spring brake actuator, which accommodates double O-ring in its adapter plate for improved sealing, with aluminium piston (1) and the aluminium pipe (2) screwed to it guided and moving freely; the surface of the aluminum pipe (2) covered in eloxal and smooth; the aluminium pipe (2) and the O-ring (3) providing a sealing system and preventing the transfer of pressurized air between the spring chamber (6) and the service brake chamber (7); the guide ring (5) ensuring proper operation of the sealing system by centering and guiding the complete piston unit which is formed by aluminium piston (1) and aluminium pipe (2). - According to Claims 1 and 2, spring brake actuator, which accommodates double O- ring in its adapter plate for improved sealing, characterized by the first 0-riϊιg (3) placed in the side of the Spring Chamber (6) and the second O-ring (12) placed in the side of the Service Brake Chamber (7). ~ According to Claims 1 , 2 and 3, spring brake actuator which accommodates double O-ring in its adapter plate for improved sealing, characterized by two O-rings (3 and
12) placed in the O-ring grooves (8 and 9) machined on the adapter plate (4). . - According to Claims 1, 2, 3 and 4, spring brake actuator, which accommodates double O-ring in its adapter plate for improved sealing, characterized by grease in the area (11) between the two O-ring systems (8, 9, 3 and 12) providing long time lubrication of the system since this area is closed at both ends, thereby preventing shrinkage and failure resulting from the lack of grease. - According to Claims 1 , 2, 3, 4 and 5, spring brake actuator, which accommodates double O-ring in its adapter plate for improved sealing, characterized by the prevention of air leakage in one of the O-rings due to shrinkage in the parts in excessively cold weather conditions or the hardening of the O-rings by the other O- ring.
PCT/TR2002/000036 2002-03-21 2002-07-17 Spring brake actuator which accomodates double o-ring on its adapter plate for improved sealing WO2003080418A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002324415A AU2002324415A1 (en) 2002-03-21 2002-07-17 Spring brake actuator which accomodates double o-ring on its adapter plate for improved sealing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200200762 2002-03-21
TR2002/00762 2002-03-21

Publications (1)

Publication Number Publication Date
WO2003080418A1 true WO2003080418A1 (en) 2003-10-02

Family

ID=28450351

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2002/000036 WO2003080418A1 (en) 2002-03-21 2002-07-17 Spring brake actuator which accomodates double o-ring on its adapter plate for improved sealing

Country Status (2)

Country Link
AU (1) AU2002324415A1 (en)
WO (1) WO2003080418A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010031512A1 (en) * 2008-09-17 2010-03-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Combined service brake- and spring brake cylinder comprising sealing assemblies consisting of a guide ring and at least one sealing element
US10106140B2 (en) 2012-11-05 2018-10-23 Nabtesco Automotive Corporation Spring brake chamber

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3932524A1 (en) * 1989-09-29 1991-04-11 Bosch Gmbh Robert Single chamber, spring loaded braking cylinder - is for vehicle brakes brakes, and has housing in several parts, with piston rod
EP0490841A1 (en) * 1990-12-13 1992-06-17 Knorr-Bremse Sistemi Per Autoveicoli Commerciali S.P.A. A dual braking unit for pneumatic braking systems
GB2261472A (en) * 1991-11-15 1993-05-19 Bendix Ltd Mounting actuators
WO1996028331A1 (en) * 1995-03-09 1996-09-19 Nai Anchorlok, Inc. Fluid-operated brake actuator with sealed bearing and method of assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3932524A1 (en) * 1989-09-29 1991-04-11 Bosch Gmbh Robert Single chamber, spring loaded braking cylinder - is for vehicle brakes brakes, and has housing in several parts, with piston rod
EP0490841A1 (en) * 1990-12-13 1992-06-17 Knorr-Bremse Sistemi Per Autoveicoli Commerciali S.P.A. A dual braking unit for pneumatic braking systems
GB2261472A (en) * 1991-11-15 1993-05-19 Bendix Ltd Mounting actuators
WO1996028331A1 (en) * 1995-03-09 1996-09-19 Nai Anchorlok, Inc. Fluid-operated brake actuator with sealed bearing and method of assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010031512A1 (en) * 2008-09-17 2010-03-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Combined service brake- and spring brake cylinder comprising sealing assemblies consisting of a guide ring and at least one sealing element
US8789664B2 (en) 2008-09-17 2014-07-29 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Combined service brake and spring brake cylinder with sealing assemblies consisting of a guide ring and at least one sealing element
US10106140B2 (en) 2012-11-05 2018-10-23 Nabtesco Automotive Corporation Spring brake chamber
EP2916028B1 (en) * 2012-11-05 2019-02-20 Nabtesco Automotive Corporation Spring brake chamber

Also Published As

Publication number Publication date
AU2002324415A1 (en) 2003-10-08

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