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Air-operated brake actuator with control valve

A technology of pneumatic brakes and actuators, applied in the direction of brakes, reciprocating engines with elastic walls, brake components, etc., capable of solving problems such as no solutions

Inactive Publication Date: 2007-03-07
HALDEX BRAKE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Air-operated brake actuator with control valve
  • Air-operated brake actuator with control valve
  • Air-operated brake actuator with control valve

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Experimental program
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Embodiment Construction

[0032] 1 and 2 show a tandem pneumatic brake actuator 10 comprising a service brake actuator 12 combined with a spring brake actuator 14 . The service brake actuator 12 applies and releases the service or service brake of the vehicle. The spring brake actuator 14 is used to apply the emergency or parking brake of the vehicle.

[0033] Both the service brake actuator 12 and the spring brake actuator 14 comprise housings 16, 18 formed by a connecting housing 20 connected to a service brake cover 22 and a spring brake cover 24, respectively. The connection housing 20 defines a common partition wall which separates the main brake housing 16 from the spring brake housing 18 and forms part of both. It is within the scope of the invention to replace the connection housing 20 with a discontinuous covering element much like the service brake cover 22 and the spring brake cover 24 .

[0034] The movable elements of the present embodiment comprise elastic diaphragms 30, 32, which span ...

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PUM

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Abstract

An air-operated brake actuator system of a vehicle comprises a spring brake actuator and a service brake actuator, the spring brake actuator including a sealed housing with a spring chamber and a pressure chamber, and a hollow actuator rod disposed in the spring brake actuator and axially moveable for applying a parking brake, the service brake actuator including a service pressure chamber for applying a service brake, in which a control valve of the brake actuator system includes a valve body placeable within the hollow actuator rod, the valve body including an opening formed therein for allowing fluid communication between the spring chamber of the spring brake actuator and the service pressure chamber of the service brake actuator through the hollow actuator rod, the control valve including a membrane formed of an elastic material and having a breathing hole formed there-through, the membrane positioned within the opening of the valve body and configured to seal the opening except the breathing hole when the membrane is not subject to a fluid pressure beyond a threshold level.

Description

technical field [0001] The present invention relates to pneumatic diaphragm brakes for vehicles, and more particularly to a service brake and spring brake actuator assembly and built-in exhaust valve mechanism to provide a sealed spring cavity that protects the spring from It is free from direct exposure to the atmosphere and environmental pollution. Background technique [0002] Air braking systems for vehicles such as buses, trucks, trailers and other heavy vehicles include brake shoe and drum assemblies that are released by the selective application of compressed air to operate actuator assemblies actuate. Conventional air brake actuators have both a service brake actuator used to actuate the brakes under normal driving conditions by applying compressed air, and a spring-loaded emergency brake actuation that causes the brakes to actuate when the air pressure has been released device. The emergency brake actuator includes a strong compression spring that forces applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01B19/02F15B21/00F16D65/14F16D65/28
CPCB60T17/083B60T13/52F15B21/04B60T13/57
Inventor 艾伯特·D·费希尔
Owner HALDEX BRAKE