Simple air brake system for transportation type tractor trailer

Abstract

The utility model discloses a transportation type tractor trailer simple air brake system which comprises an air pump and an engine, an engine filter is arranged in the engine, the power take-off end of the engine is fixedly connected with the air pump, an air pump air inlet is formed in the air pump, the output end of the air pump is fixedly connected with an unloading valve through a pipeline, and the unloading valve is fixedly connected with the power take-off end of the engine. One end of the unloading valve is fixedly connected with the foot brake valve through a pipeline, one end of the foot brake valve is fixedly connected with the air storage cylinder through a pipeline, the foot brake valve is fixedly connected with the hand brake valve through a pipeline, and one end of the hand brake valve is communicated with the air brake output connector through a pipeline. Multiple pressure control means are provided, safety is achieved, meanwhile, when the air cylinder meets the use air pressure, the air pump can conduct low-pressure unloading, and the effective utilization rate of engine power can be increased; the system structure is extremely simple, and brake control can be effectively provided for the tractor trailer.

Description

Technical Field

[0001] The utility model relates to the technical field of air cut-off brake systems, in particular to a simple air cut-off brake system for a transport-type tractor trailer. Background Technique

[0002] In rural areas, tractors have become a means of transportation for many farmers. Since autumn is the harvest season and the busiest season for farmers, tractors are commonly used by farmers for transportation operations. Especially in rural areas where there are no roads and the ground is covered with mud during rainy seasons, the transportation status of tractors is irreplaceable. There are many slopes on many road conditions. When tractors are transporting, they carry a lot of goods and their weight is light. Therefore, for safety reasons, trailers with air cut-off brakes need to be selected, which requires tractors to be equipped with air pressure output devices. An air cut-off brake means that the engine air pump drives compressed air to push the piston, and the piston acts on a strong spring to generate or release the braking force. During normal driving of the tractor, the compressed air squeezes the strong spring to contract. When the tractor brakes, the air pressure in the air storage tank decreases, and the air pressure cannot squeeze the strong spring to compress. At this time, the strong spring pops out to achieve the braking effect. The use of an air cut-off brake can greatly enhance the safety performance of tractor driving, and the main acting mechanism of the brake is the brake pedal, which triggers the foot brake valve through the braking mechanism by stepping on the brake pedal.

[0003] For the existing simple air cut-off brake system of a transport-type tractor trailer, there are few pressure control means, the air pump cannot unload at low pressure, the utilization rate of the engine power is not high, and the air cut-off brake system is relatively complex. The device of the utility model has multiple pressure control means, effectively improves driving safety, the air pump can unload at low pressure, effectively improves the utilization rate of the engine power, and the system structure is extremely streamlined. Content of the Utility Model

[0004] The purpose of the utility model is to provide a simple air cut-off brake system for a transport-type tractor trailer, so as to solve the problems of few pressure control means, the air pump cannot unload at low pressure, the low utilization rate of the engine power, and the relatively complex air cut-off brake system.

[0005] To achieve the above object, a simple air cut-off brake system for a transport tractor trailer is provided, including: an air pump and an engine. An engine air filter is provided inside the engine. The power take-off end of the engine is fixedly connected to the air pump. An air pump air inlet is provided on the air pump. The output end of the air pump is fixedly connected to a relief valve through a pipeline. One end of the relief valve is fixedly connected to a foot brake valve through a pipeline. One end of the foot brake valve is fixedly connected to an air storage tank through a pipeline. The foot brake valve is fixedly connected to a hand brake valve through a pipeline. One end of the hand brake valve is communicated with an air brake output joint through a pipeline. One end of the air brake output joint is fixedly connected to a trailer air brake inlet pipeline. Through the mutual cooperation of the air pump, relief valve, foot brake valve, air storage tank and hand brake valve, there are multiple pressure control means. While ensuring safety, when the air storage tank meets the operating air pressure, the air pump can unload at low pressure, which can improve the effective utilization rate of the engine power. The system structure is extremely concise and can effectively provide brake control for the tractor trailer.

[0006] According to the simple air cut-off brake system for a transport tractor trailer described above, an alarm switch is provided on the air storage tank, and a safety valve is installed on the air storage tank. Through the alarm switch, a warning can be given when the air pressure inside the air storage tank is too low.

[0007] According to the simple air cut-off brake system for a transport tractor trailer described above, a drain valve is installed on the air storage tank, and the relief valve is installed on the engine through a bracket. Through the drain valve, the moisture inside the air storage tank can be discharged, preventing it from affecting the braking effect. At the same time, it can reduce the additional erosion on the air storage tank and is beneficial to extending the service life.

[0008] According to the simple air cut-off brake system for a transport tractor trailer described above, a foot brake valve pedal is provided on the foot brake valve. The foot brake valve is controlled through the foot brake valve pedal, which increases the convenience of use. The usage method is simple and the practicability is strong.

[0009] Compared with the prior art, the beneficial effects of the present utility model are:

[0010] 1. Through the mutual cooperation of the air pump, relief valve, foot brake valve, air storage tank and hand brake valve, there are multiple pressure control means. While ensuring safety, when the air storage tank meets the operating air pressure, the air pump can unload at low pressure, which can improve the effective utilization rate of the engine power.

[0011] 2. The system structure is extremely concise and can effectively provide brake control for the tractor trailer.

[0012] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 is a schematic structural diagram of a simple air cut-off brake system for a transport tractor trailer of the present utility model;

[0015] Figure 2 is the air brake principle diagram of a simple air cut-off brake system for a transport tractor trailer of the present utility model.

[0016] In the figure: 1. Engine; 2. Air pump; 3. Unloading valve; 4. Foot brake valve; 5. Hand brake valve; 6. Air brake output joint; 7. Air storage tank; 8. Alarm switch; 9. Safety valve; 10. Drain valve; 11. Trailer air brake inlet pipeline. Specific implementation manner

[0017] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figure 1-2 , the embodiments of the present utility model provide a technical solution: a simple air cut-off brake system for a transport tractor trailer, including: an air pump 2 and an engine 1. The air pump 2 is fixed on a power take-off port at the engine 1 end, and the air pump 2 is directly driven by the power take-off port drive shaft of the engine 1. The suction port of the air pump 2 is connected to the bypass manifold of the engine 1 intake pipeline through a pipeline. The air pump 2 is directly driven by the power take-off port drive shaft of the engine 1. An engine air filter is provided inside the engine 1 to filter gas, reduce failures, and is beneficial to extending the service life. The power take-off end of the engine 1 is fixedly connected to the air pump 2. An air pump intake port is provided on the air pump 2. The output end of the air pump 2 is fixedly connected to the unloading valve 3 through a pipeline. The unloading valve 3 continuously supplies gas to the system when the system pressure is lower than its set pressure value. When the pressure reaches the set pressure value, the connection with the system is cut off. The system pressure is maintained by the air storage tank 7. The gas output by the air pump 2 is unloaded at low pressure through the unloading valve 3 to reduce the power consumption of the engine 1. One end of the unloading valve 3 is fixedly connected to the foot brake valve 4 through a pipeline. One end of the foot brake valve 4 is fixedly connected to the air storage tank 7 through a pipeline. The foot brake valve 4 is fixedly connected to the hand brake valve 5 through a pipeline for braking. One end of the hand brake valve 5 is communicated with the air brake output joint 6 through a pipeline. One end of the air brake output joint 6 is fixedly connected to the trailer air brake inlet pipeline 11.

[0019] An alarm switch 8 is provided on the air storage tank 7 to remind personnel to pay attention to the gas state inside the air storage tank 7. A safety valve 9 is installed on the air storage tank 7, and a drain valve 10 is installed on the air storage tank 7. The unloading valve 3 is installed on the engine 1 through a bracket, and the foot brake valve 4 is fixedly connected to the foot brake valve pedal through a connecting rod.

[0020] Working principle: When the tractor is not connected to a trailer, the hand brake valve 5 is in a closed state, and there is no gas output from the air brake output joint 6. When the pressure in the air storage tank 7 is too low, the unloading valve 3 delivers the gas generated by the air pump 2 to the air storage tank 7 for pressurization. When the pressure value reaches the set value, the unloading valve 3 cuts off the air storage tank 7 system for pressure holding, and the gas generated by the air pump 2 is discharged at low pressure through the exhaust port of the unloading valve 3. When the trailer breakaway air brake system is connected, the hand brake valve 5 needs to be closed during parking to make the trailer perform breakaway braking by its own hard spring. When driving is required, the hand brake valve 5 is opened. When braking is needed, step on the foot brake pedal, and the foot brake valve 4 is prompted to close or the air port is reduced through the connecting rod, thereby performing auxiliary braking.

[0021] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art to which the present invention pertains, various changes can be made without departing from the gist of the present invention.

Claims

1. A simple air-break system for a transport tractor-trailer, comprising: An air pump (2) and an engine (1), characterized in that an engine air filter is provided inside the engine (1), a power take-off end of the engine (1) is fixedly connected to the air pump (2), an air inlet of the air pump (2) is provided on the air pump (2), an output end of the air pump (2) is fixedly connected to a relief valve (3) through a pipeline, one end of the relief valve (3) is fixedly connected to a foot brake valve (4) through a pipeline, one end of the foot brake valve (4) is fixedly connected to an air storage tank (7) through a pipeline, the foot brake valve (4) is fixedly connected to a hand brake valve (5) through a pipeline, one end of the hand brake valve (5) is communicated with an air brake output joint (6) through a pipeline, and one end of the air brake output joint (6) is fixedly connected to a trailer air brake inlet pipeline (11).

2. A simple air break system for a transport tractor trailer as described in claim 1, characterized in that: An alarm switch (8) is provided on the air storage tank (7), and a safety valve (9) is installed on the air storage tank (7).

3. A simple air cut-off brake system for a transport tractor trailer as described in claim 1, characterized in that: A drain valve (10) is installed on the air storage tank (7), and the relief valve (3) is installed on the engine (1) through a bracket.

4. A simple spring brake system for a transport tractor trailer according to claim 1, characterized in that: The foot brake valve (4) is fixedly connected to a foot brake valve pedal through a connecting rod.

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