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Problems solved by technology
China's authorized announcement number is CN203819220U utility model patent specification discloses a parking brake system for trailers used in coal mines, which solves the problem that the trailer also has brakes when the tractor is parked and braked, but this system needs to be set. Moving valve, air control valve 10, relay valve 11, one-way valve 12, second air bag 13, generally vehicles also need to be equipped with gear selection operation valve, so the system is more complicated
In addition, it cannot be realized that the vehicle has a parking brake when it is hung in neutral, so there is a potential safety hazard.
Method used
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[0010] See figure 1 , the vehicle gear selection, parking brake joint control system includes fuel tank 1, filter 2, hydraulic pump 3, safety valve 4, tractor parking brake 11, tractor parking hydraulic cylinder 12, hydraulic control air valve 13, air bag 14 , afterburner 15, also comprise gear selection operating valve 5, forward gear clutch 6, reverse gear clutch 7, shuttle valve 8, hydraulic control valve 9, accumulator 10, trailer parking brake 16, trailer parking hydraulic cylinder 17. The select operation valve 5 includes a joystick 5-1.
[0011] The oil inlet port of the hydraulic pump 3 is connected to the oil tank 1 through the filter 2, the oil outlet port of the hydraulic pump 3 is connected to the oil inlet port P of the gear selection operation valve 5, and the execution port A of the gear selection operation valve 5 passes through two oil The passages are respectively connected with the A port of the forward gear clutch 6 and the shuttle valve 8, the execution p...
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Abstract
The invention provides a vehicle gear selecting, parking and braking joint control system and a work method. The vehicle gear selecting, parking and braking joint control system comprises an oil box,a filter, a hydraulic pump, a safety valve, a gear selecting operation valve, a forwarding gear clutch, a retreating gear clutch, a shuttle valve, a hydraulic control valve, an energy accumulator, a tractor parking brake, a tractor parking hydraulic cylinder, a hydraulic control air valve, an airbag, an assistor, a trailer parking brake and a trailer parking hydraulic cylinder. The gear selectingoperation valve comprises an operation rod. When a vehicle is shifted to be neutral, a tractor and a trailer are under parking braking, so that when the vehicle is stopped on a slope for work, an accident does not easily occur; when the tractor is under parking braking, the trailer is also under parking braking without the arrangement of a tractor parking braking valve, an air control valve, a relay valve, a one-way valve and a second airbag, and the system of the vehicle is simplified.
Description
technical field [0001] The invention relates to the technical field of vehicle control, in particular to a combined control system for gear selection and parking braking of a vehicle and a working method. Background technique [0002] Trailers include tractors and trailers. Some trailers need to work when they are parked. At this time, the vehicle needs to be hung in neutral and the parking brake valve of the tractor is operated for parking brake. In practice, it often happens that the tractor is not operated. When the parking brake valve is used for parking brake, the vehicle will be parked. At this time, if the vehicle is on a slope, accidents are likely to occur. In addition, when working on a slope with a large slope, both the tractor and the trailer must have parking brakes to ensure that the vehicle does not slide down the slope. China's authorized announcement number is CN203819220U utility model patent specification discloses a parking brake system for trailers used...
Claims
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