CN2717777Y - Synchronous inductive load valve - Google Patents
Synchronous inductive load valve Download PDFInfo
- Publication number
- CN2717777Y CN2717777Y CN 200320122559 CN200320122559U CN2717777Y CN 2717777 Y CN2717777 Y CN 2717777Y CN 200320122559 CN200320122559 CN 200320122559 CN 200320122559 U CN200320122559 U CN 200320122559U CN 2717777 Y CN2717777 Y CN 2717777Y
- Authority
- CN
- China
- Prior art keywords
- piston
- push rod
- control
- cavity
- valve
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a synchronous inductive load valve composed of the upper casing of the synchronous inductive load valve and a lower casing connected with the upper casing. A cam wheel is arranged in the lower casing. The upper part of the cam wheel is provided with a push rod. The top of the push rod is provided with a top cap on the upper casing. The push rod is connected with an operating rod arranged on the lower casing. A piston cavity is arranged in the lower casing. A control piston is arranged on the push rod in the piston cavity. A servo piston is arranged on the control piston. The area of the control piston is bigger than that of the servo piston. The piston cavity is divided into an air-out cavity, a regulating cavity and a control cavity by the control piston and the servo piston. The regulating cavity is communicated with atmosphere through a small hole. The lower part of the control piston is provided with a valve which is respectively provided with an air inlet valve base and an air exhaust valve base. A brake interface connected with a brake valve is arranged on the upper casing. An air outlet interface connected with a back brake chamber and an air inlet interface connected with an air tank are arranged on the lower casing. The synchronous inductive load valve of the utility model is suitable for freight cars, passenger cars, etc.
Description
Technical field
The utility model relates to a kind of automobile component, especially relates to a kind of synchronous load sensing valve.
Background technology
The radical function that is loaded on the load sensing valve on the back axle on the automobile be control trailing wheel braking force with the variation of back axle load respective change.Distance respective change when changing between frame beam and the back axle because of back axle load, load is big, distance is just little, the transmission leverage is because of the size of above-mentioned distance, make the cam angle difference of load sensing valve, make braking pressure that leads to trailing wheel and the ratio respective change of controlling air pressure by valve in-to-in structure, braking force is respective change also.Braking pressure is less than control air pressure (control air pressure and front wheel brake air pressure equate) when unloaded, and load-carrying just can reach and control air pressure and equate to constant weight.But the shortcoming of the existence of at present traditional load sensing valve is a load sensing valve because structure etc., and the back axle air pressure of load sensing valve control is along with the variation of load carrying ability can only be smaller or equal to control air pressure, so there is the unsafe factor of driving.
Summary of the invention
The purpose of this utility model is at the existing defective of above-mentioned load sensing valve, provides a kind of design more rational synchronous load sensing valve.In the specified air pressure range of vehicle, when the trailing wheel braking pressure can be unloaded less than control air pressure, in the time of also can heavy duty greater than control air pressure.
In order to achieve the above object, the utility model has mainly adopted following technical scheme to realize.The utility model is made up of the lower house of load sensing valve upper shell and coupled body, is provided with cam in the lower house, and the top of cam is provided with push rod, and the top of push rod is provided with top cover on upper shell, and push rod is connected at the joystick on the lower house.In lower house, be provided with plunger shaft, in plunger shaft, on push rod, be provided with control plunger, on control plunger, also be provided with relay piston, the control plunger area is greater than relay piston, control plunger and relay piston are divided into plunger shaft outlet chamber, regulate chamber and control chamber, regulate the chamber and communicate with atmosphere by the aperture of being located on the lower house.The below of control plunger is provided with valve, and is respectively equipped with inlet valve seat and exhaust valve seat.On upper shell, be provided with the control interface that connects brake activation valve, on lower house, also be provided with the interface of giving vent to anger that connects the back brake repair room, the intake interface that reaches the connection air tank.
The utility model compared with prior art has following obvious advantage and progress.Increased the structure of relay piston below control plunger, the control plunger area is greater than relay piston.When heavy duty, braking goes out atmospheric pressure greater than control air pressure early stage, has the effect of pressure amplification, increases the braking force of trailing wheel.When zero load, go out atmospheric pressure and be lower than control air pressure, can prevent that automobile back wheel is seized and cause defective steering stabilizer.Guaranteed the safety of driving effectively.
The utility model is applicable to lorry, passenger vehicle and car.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Description of drawings
Accompanying drawing is the utility model integral structure cut-away view.
The specific embodiment
As shown in the figure, the utility model is made up of the lower house 18 of synchronous load sensing valve upper shell 11 and coupled body, be provided with cam 19 in the lower house 18, the top of cam 19 is provided with push rod 10, the top of push rod 10, be provided with top cover 12 on upper shell 11, push rod 10 is connected at the joystick 15 on the lower house 18.In lower house 18, be provided with plunger shaft 14, in plunger shaft 14, on push rod 10, be provided with control plunger 8, on control plunger 8, also be provided with relay piston 4, control plunger 8 areas are greater than relay piston 4, control plunger 8 and relay piston 4 are divided into plunger shaft 14 outlet chamber 5, regulate chamber 7 and control chamber 9, regulate chamber 7 and communicate with atmosphere by the aperture of being located on the lower house 18 6.The below of control plunger 8 is provided with valve 2, and is respectively equipped with inlet valve seat 16 and exhaust valve seat 3.On upper shell 11, be provided with the control interface 13 that connects brake activation valve, on lower house 18, also be provided with the admission port 1 of give vent to anger interface 17 and the connection air tank that connect the back brake repair room.
The utility model is applicable to compressed air brake lorry, passenger vehicle etc.
Claims (3)
1, a kind of synchronous load sensing valve, lower house (18) by synchronous load sensing valve upper shell (11) and coupled body is formed, be provided with cam (19) in the lower house (18), the top of cam (19) is provided with push rod (10), the top of push rod (10), on upper shell (11), be provided with top cover (12), push rod (10) is connected at the joystick (15) on the lower house (18), it is characterized in that in lower house (18), being provided with plunger shaft (14), in plunger shaft (14), on push rod (10), be provided with control plunger (8), also be provided with relay piston (4) on control plunger (8), control plunger (8) and relay piston (4) are divided into outlet chamber (5) to plunger shaft (14), regulate chamber (7) and control chamber (9).
2, synchronous load sensing valve according to claim 1 is characterized in that the area of the area of control plunger (8) greater than relay piston (4).
3, synchronous load sensing valve according to claim 1 is characterized in that regulating chamber (7) and communicates with atmosphere by the aperture of being located on the lower house (18) (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320122559 CN2717777Y (en) | 2003-12-15 | 2003-12-15 | Synchronous inductive load valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320122559 CN2717777Y (en) | 2003-12-15 | 2003-12-15 | Synchronous inductive load valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2717777Y true CN2717777Y (en) | 2005-08-17 |
Family
ID=34891946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320122559 Expired - Fee Related CN2717777Y (en) | 2003-12-15 | 2003-12-15 | Synchronous inductive load valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2717777Y (en) |
-
2003
- 2003-12-15 CN CN 200320122559 patent/CN2717777Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050817 Termination date: 20101215 |