WO2012036646A2 - A spring brake actuator - Google Patents

A spring brake actuator Download PDF

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Publication number
WO2012036646A2
WO2012036646A2 PCT/TR2011/000209 TR2011000209W WO2012036646A2 WO 2012036646 A2 WO2012036646 A2 WO 2012036646A2 TR 2011000209 W TR2011000209 W TR 2011000209W WO 2012036646 A2 WO2012036646 A2 WO 2012036646A2
Authority
WO
WIPO (PCT)
Prior art keywords
impermeability
push rod
adapter plate
diaphragm
spring brake
Prior art date
Application number
PCT/TR2011/000209
Other languages
French (fr)
Other versions
WO2012036646A3 (en
Inventor
Ahmet Arkan
Original Assignee
Arfesan Arkan Fren Elemanlari Sanayi Ve Ticaret 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 Sanayi Ve Ticaret A.S. filed Critical Arfesan Arkan Fren Elemanlari Sanayi Ve Ticaret A.S.
Publication of WO2012036646A2 publication Critical patent/WO2012036646A2/en
Publication of WO2012036646A3 publication Critical patent/WO2012036646A3/en

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
    • B60T17/083—Combination of service brake actuators with spring loaded brake actuators
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F16B5/0258—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread using resiliently deformable sleeves, grommets or inserts

Definitions

  • This invention relates to increasing the impermeability of the adapter plate contained by a spring brake actuator.
  • the spring brake actuators used nowadays are generally grouped in two main types. These are diaphragm - diaphragm spring brake actuators and diaphragm - piston spring brake actuators.
  • the spring brake actuators are used in heavy commercial vehicles (lorry, truck, trailer, bus, etc.).
  • Diaphragm-diaphragm type of spring actuators consist of a service brake chamber that is active under normal driving conditions and a park chamber that is activated in case of air leakage or deliberate discharge of the air (pulling the hand brake).
  • Service chamber brakes when the vehicle is slowed down or stopped; whereas the park chamber brakes when the vehicle is fixed.
  • the service chamber functions when the force is applied on the foot brake and the park chamber function when the force is applied on the hand brake of the vehicle.
  • Park chamber is the section that is formed with the connection of the adapter plate with the canister by means of any figure connection and is the section between the emergency diaphragm and the adapter plate.
  • Park chamber of the actuator generally is comprised by a strong spring, emergency diaphragm, aluminum flange and return spring. There is compressed air inside the park chamber constantly sent by the compressor while the vehicle is moving. Compressed air allows the compression of the emergency spring.
  • each of the plastic guide (13) and metallic guide (15), being the subject of the application no. TR 2008 07310 Y in the prior art is placed inside the guide which is on the 5 adapter plate (2) and through which the push rod (7) passes.
  • These members are developed with an aim to diminish the corrosion of the push rod while fractioning with the adapter plate during the motion of the adapter plate.
  • the function of each impermeability member mentioned is to avoid the decrease of the pressure involuntarily by ensuring the bedding of the push rod (7) and impermeability of the o-rings used at the periphery and the park 10 chamber (1) to the service chamber.
  • Plastic guide (13) is located on the adapter plate (2); and beds the push rod (7) which passes through the adapter plate.
  • O-rings which are placed between the adapter plate and the plastic guide are used for the impermeability in addition to the bedding.
  • O-rings which are positioned inner side of the plastic guide both prevents any possible leakage from 15 that point and the outer o-rings prevents possible leakages which may occur at the outer side of the plastic guide.
  • Another embodiment of the conventional technique is metallic guides.
  • the adapter plate itself is used as a separate bedding member. Impermeability is ensured by means of the impermeability members fixed in the channels at the core of the adapter plate.
  • This invention is related to a new design for the guide section that is located between the adapter plate and the push rod, each being a part of the spring brake actuators.
  • the rubber guide that is developed for the adapter plate center enhances the flexibility of the push rod passing through the center; eliminates the corrosions; and ensures impermeability.
  • Figure 2 - is a view of the push rod detail in the plastic core diaphragm - diaphragm type of the spring brake actuator section.
  • Figure 3 - is a view of the push rod detail in the rubber guided diaphragm - diaphragm type of the spring brake actuator section that is the subject of the invention.
  • Figure 4 - is a view of the push rod detail in another embodiment section of the rubber bedded diaphragm - diaphragm type of the spring brake actuator.
  • the invention is basically a spring brake actuator comprising rubber guide (15) that will prevent the leakage of the compressed air inside the park chamber (1) through the push rod (7) and the adapter plate (2) to the service chamber during the movement of the push rod (7) within the adapter plate (2); and simultaneously bring flexibility of movement to the push rod.
  • the emergency spring (5) is released with the discharge of the compressed air within the park chamber (1).
  • push rod (7) allows the movement of the service diaphragm (9) towards inside the service chamber (8).
  • the force is transmitted to the brake adjusting lever via the shaft (10) located inside the diaphragm service chamber.
  • the system When it is intended to stop braking, the system requires to be brought to the first position. It needs to return the system back to its initial position upon ending the braking.
  • the park chamber (1) is filled with the compressed air and the emergency spring (5) is compressed.
  • return springs (12) positioned inside the park chamber (1) and the service chamber bring back the emergency diaphragm (3) and the service diaphragm (9) back to their initial position, while the shaft (10) moves in "b" direction and enables to remove the braking force.
  • Embodiment of the invention is the rubber guide (15) that provides impermeability and bedding ( Figure-4).
  • the rubber guide (15) is a piece in cylinder form that is mounted at the core of the adapter plate (2).
  • rubber guide (15) member replace metal / plastic guide (13) and impermeability members (11 and 14) at the gap where the park chamber (1) and the service chamber (8) connect with each other; and bedding and impermeability both are achieved. It prevents corrosion by contacting with the adapter plate (2) or any metal member during forward - backward movements of the push rod (7) while the actuator is operated.
  • the bedding member (15) renders the usage of a separate impermeability member unnecessary with the impermeability rings (16, 18 and 19) that are positioned on the inner and outer surfaces and function as o-ring.
  • the compressed air filled inside the park chamber (1) extends over the rubber guide (15) at the core of the adapter plate (2).
  • impermeability is achieved by means of the impermeability rings (16, 18 and 19) at inner and outer surfaces of the rubber guide (15). Several number of rings enhances the safety of the impermeability.

Landscapes

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

Abstract

This invention relates to increasing the impermeability of the adapter plate contained by a spring brake actuator. This invention is associated with a new design for the guide section that allows the impermeability between the adapter plate and the push rod, each being a part of the spring brake actuators. With the rubber guide developed for the center of the adapter plate, the flexibility of the push rod passing through the center is enhanced; corrosions are eliminated; and simultaneously impermeability is achieved.

Description

A SPRING BRAKE ACTUATOR
Technical Field of Invention
This invention relates to increasing the impermeability of the adapter plate contained by a spring brake actuator.
Prior Art
The spring brake actuators, used nowadays are generally grouped in two main types. These are diaphragm - diaphragm spring brake actuators and diaphragm - piston spring brake actuators. The spring brake actuators are used in heavy commercial vehicles (lorry, truck, trailer, bus, etc.).
Diaphragm-diaphragm type of spring actuators consist of a service brake chamber that is active under normal driving conditions and a park chamber that is activated in case of air leakage or deliberate discharge of the air (pulling the hand brake). Service chamber brakes when the vehicle is slowed down or stopped; whereas the park chamber brakes when the vehicle is fixed. In other words, the service chamber functions when the force is applied on the foot brake and the park chamber function when the force is applied on the hand brake of the vehicle.
Park chamber is the section that is formed with the connection of the adapter plate with the canister by means of any figure connection and is the section between the emergency diaphragm and the adapter plate. Park chamber of the actuator generally is comprised by a strong spring, emergency diaphragm, aluminum flange and return spring. There is compressed air inside the park chamber constantly sent by the compressor while the vehicle is moving. Compressed air allows the compression of the emergency spring.
When the pressure decreases in the vehicle for any reason or it is intended to fix the vehicle (pulling the hand brake), the air pressure in the park chamber decreases or completely vanishes. In that case, the flange no more compresses the spring and the spring is released. With the release of the spring, the force is transmitted to the shaft inside the service chamber by means of the push rod at the center of the adapter plate and extends over the wheels of the vehicle.
Various designs have been developed for the solution of the corrosion problems occurring in the adapter plate guide. However, these designs are not aimed to eliminate the l causes of the corrosion but only to decrease the corrosions. In some of these designs, plastic guide materials are used, and metallic guide materials in some other designs.
Each of the plastic guide (13) and metallic guide (15), being the subject of the application no. TR 2008 07310 Y in the prior art is placed inside the guide which is on the 5 adapter plate (2) and through which the push rod (7) passes. These members are developed with an aim to diminish the corrosion of the push rod while fractioning with the adapter plate during the motion of the adapter plate. The function of each impermeability member mentioned is to avoid the decrease of the pressure involuntarily by ensuring the bedding of the push rod (7) and impermeability of the o-rings used at the periphery and the park 10 chamber (1) to the service chamber.
Plastic guide (13) is located on the adapter plate (2); and beds the push rod (7) which passes through the adapter plate. O-rings which are placed between the adapter plate and the plastic guide are used for the impermeability in addition to the bedding. O-rings which are positioned inner side of the plastic guide both prevents any possible leakage from 15 that point and the outer o-rings prevents possible leakages which may occur at the outer side of the plastic guide. Another embodiment of the conventional technique is metallic guides. In the application no TR2002 00762 Y, the adapter plate itself is used as a separate bedding member. Impermeability is ensured by means of the impermeability members fixed in the channels at the core of the adapter plate.
20 In the prior art, in order to achieve the said bedding and impermeability, impermeability members which are mounted on the adapter plate are used as it is stated in the patent application no. CA2550930A1.
I
Brief Description of the Invention
25 This invention is related to a new design for the guide section that is located between the adapter plate and the push rod, each being a part of the spring brake actuators. The rubber guide that is developed for the adapter plate center enhances the flexibility of the push rod passing through the center; eliminates the corrosions; and ensures impermeability.
Detailed Description of the Invention
30 The spring brake actuators provided in order to achieve the purpose of the present invention is shown in the appendix, where; Figure 1 - is a sectional view of the double ring diaphragm - diaphragm type of the spring brake actuators with the push rod detail in the prior art.
Figure 2 - is a view of the push rod detail in the plastic core diaphragm - diaphragm type of the spring brake actuator section.
Figure 3 - is a view of the push rod detail in the rubber guided diaphragm - diaphragm type of the spring brake actuator section that is the subject of the invention.
Figure 4 - is a view of the push rod detail in another embodiment section of the rubber bedded diaphragm - diaphragm type of the spring brake actuator.
The parts in the figure are enumerated individually and the numbers are listed with their corresponding parts as follows.
1. Park chamber
2. Adapter plate
3. Emergency diaphragm
4. Flange
5. Emergency spring
6. Push rod flange
7. Push rod
8. Service chamber
9. Service diaphragm
10. Shaft
11. 0-ring type impermeability member
12. Return spring
13. Plastic guide
14. Plastic guide impermeability member
15. Rubber guide
16. Impermeability ring
17. Rubber guided member
18. Outer impermeability members 19. Inner impermeability members
The invention is basically a spring brake actuator comprising rubber guide (15) that will prevent the leakage of the compressed air inside the park chamber (1) through the push rod (7) and the adapter plate (2) to the service chamber during the movement of the push rod (7) within the adapter plate (2); and simultaneously bring flexibility of movement to the push rod. In vehicles having spring brake actuators, when the spring brake is used, the emergency spring (5) is released with the discharge of the compressed air within the park chamber (1). With the push of the push rod flange (6) by the emergency spring (5) flange (4) in "a" direction, push rod (7) allows the movement of the service diaphragm (9) towards inside the service chamber (8). Hence, the force is transmitted to the brake adjusting lever via the shaft (10) located inside the diaphragm service chamber.
When it is intended to stop braking, the system requires to be brought to the first position. It needs to return the system back to its initial position upon ending the braking. For this purpose, initially the park chamber (1) is filled with the compressed air and the emergency spring (5) is compressed. With the removal of the driving force of the emergency spring (5), return springs (12) positioned inside the park chamber (1) and the service chamber bring back the emergency diaphragm (3) and the service diaphragm (9) back to their initial position, while the shaft (10) moves in "b" direction and enables to remove the braking force.
Embodiment of the invention is the rubber guide (15) that provides impermeability and bedding (Figure-4). The rubber guide (15) is a piece in cylinder form that is mounted at the core of the adapter plate (2). In the current system, rubber guide (15) member replace metal / plastic guide (13) and impermeability members (11 and 14) at the gap where the park chamber (1) and the service chamber (8) connect with each other; and bedding and impermeability both are achieved. It prevents corrosion by contacting with the adapter plate (2) or any metal member during forward - backward movements of the push rod (7) while the actuator is operated. As it is can be viewed in Figure -3 and Figure -4, the bedding member (15) renders the usage of a separate impermeability member unnecessary with the impermeability rings (16, 18 and 19) that are positioned on the inner and outer surfaces and function as o-ring.
When it is intended to end the braking, the compressed air filled inside the park chamber (1) extends over the rubber guide (15) at the core of the adapter plate (2). There, impermeability is achieved by means of the impermeability rings (16, 18 and 19) at inner and outer surfaces of the rubber guide (15). Several number of rings enhances the safety of the impermeability.
Another alternative design developed in relation with the invention is the design of rubber guide (15 and 17) consisting of impermeability rings in less numbers but larger sizes (Figure-3). In order for this rubber guide (15) to provide impermeability, it contains inner impermeability rings (19) which puts on the push rod (7) and outer impermeability rings (18) that puts on the adapter plate (2) on the outside. These rings allow not only impermeability but also flatness by means of bedding during the movements of the push rod (7).

Claims

1. A spring brake actuator in order to ensure the impermeability of in spring brake actuators comprising;
- a park chamber (1) enclosing compressed air,
- adapter plate (2) containing push rod (7),
- emergency diaphragm (3) compressed with push of the push rod (7),
- flange (4) pushing the emergency diaphragm (3),
- emergency spring (5) pushing the flange (4) with the decrease of the pressure inside the adapter plate (2),
- push rod flange (6) pushed by the force of the flange (4) connected to the push rod (7),
- push rod (7) pushed by the push rod flange (6),
- service chamber (8) inside which the service diaphragm (9) moves,
- service diaphragm (9) compressed by the push of the push rod (7),
- shaft (10) pushed with the compression of the service diaphragm (9),
- return spring (12) that brings back the shaft (10) in its place for removing the braking effect,
and characterized with
- a rubber bedding member (15) which ensures the bedding of the push rod (7) inside the adapter plate (2) and the impermeability with the impermeability ring (16), the outer impermeability ring (18) and the inner impermeability ring (19).
2. A spring brake actuator according to Claim 1 and characterized with rubber bedding member (17) bearing impermeability rings on its inner and outer profiles in various numbers.
PCT/TR2011/000209 2010-09-16 2011-09-16 A spring brake actuator WO2012036646A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2010/07609 2010-09-16
TR2010/07609A TR201007609A2 (en) 2010-09-16 2010-09-16 An emergency brake bellows.

Publications (2)

Publication Number Publication Date
WO2012036646A2 true WO2012036646A2 (en) 2012-03-22
WO2012036646A3 WO2012036646A3 (en) 2012-08-16

Family

ID=44910283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2011/000209 WO2012036646A2 (en) 2010-09-16 2011-09-16 A spring brake actuator

Country Status (2)

Country Link
TR (1) TR201007609A2 (en)
WO (1) WO2012036646A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10663025B2 (en) 2018-07-31 2020-05-26 Bendix Spicer Foundation Brake Llc Bushing assembly for a spring brake actuator of a vehicle air braking system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HUE047677T2 (en) 2014-02-14 2020-05-28 Arfesan Arkan Fren Elemanlari Sanayi Ve Ticaret A S Center bearing of adapter plate comprising rubber and rigid plastic members developed for spring brake actuators

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR200200762U (en) 2002-03-21 2002-10-21 Arfesan Arkan Fren Elemanlari San. Ve Ti̇c. A.Ş. Highly sealed brake springs with double O-rings between them
CA2550930A1 (en) 2005-07-18 2007-01-18 Bendix Commercial Vehicle Systems Llc Improved rod/seal bearing arrangement utilizing locking fingers
TR200807310U (en) 2008-09-24 2008-12-22 Arfesan Arkan Fren Elemanlari San. Ve Ti̇c. A.Ş. Plastic connection bearing.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5349194A (en) * 1993-03-25 1994-10-11 Nai Anchorlok, Inc. Sealed bearing for fluid-operated brake actuator
US7493994B2 (en) * 2004-12-16 2009-02-24 Bendix Spicer Foundation Brake Llc Spring brake actuator with mid-located spring

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR200200762U (en) 2002-03-21 2002-10-21 Arfesan Arkan Fren Elemanlari San. Ve Ti̇c. A.Ş. Highly sealed brake springs with double O-rings between them
CA2550930A1 (en) 2005-07-18 2007-01-18 Bendix Commercial Vehicle Systems Llc Improved rod/seal bearing arrangement utilizing locking fingers
TR200807310U (en) 2008-09-24 2008-12-22 Arfesan Arkan Fren Elemanlari San. Ve Ti̇c. A.Ş. Plastic connection bearing.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10663025B2 (en) 2018-07-31 2020-05-26 Bendix Spicer Foundation Brake Llc Bushing assembly for a spring brake actuator of a vehicle air braking system

Also Published As

Publication number Publication date
TR201007609A2 (en) 2012-04-24
WO2012036646A3 (en) 2012-08-16

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