JPH0415586Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a hydraulic piping system for tractors, and more specifically, it is possible to arrange the hydraulic piping compactly, and to separate the flow of pressure oil from a hydraulic pump mounted on one side of the engine. The present invention relates to a hydraulic piping system for a tractor that can prevent piping leading to a valve from being damaged by contact with mud or the like or from becoming hot due to an increase in oil temperature during operation.

Conventional technology Generally speaking, in agricultural tractors that use hydraulic pressure to raise and lower the work equipment attached to the machine body, the hydraulic piping from the hydraulic pump is connected to the hydraulic system for raising and lowering the work equipment and the hydraulic line for power steering via a diversion valve. It is branching out. However, this type of piping has traditionally been installed along the underside of the aircraft.
The piping structure becomes complicated, especially when the hydraulic pump is installed on one side of the engine and the diverter valve is installed on the opposite side due to the arrangement of equipment installed on the aircraft. The piping from the engine base to the diverter valve protruded significantly downward as it crossed the engine base to the other side, and there was a risk that it would be damaged by hitting mud during work. Further, since the oil pressure is particularly high between the hydraulic pump and the diverter valve, there is a problem in that the temperature of the pressure oil rises and the hydraulic piping becomes hot.

Problems to be Solved by the Present Invention The present invention was devised to solve these problems in view of the above-mentioned actual situation, and its purpose is to The power steering piping and the power steering piping can be arranged compactly close to one side of the engine base, and the piping from the hydraulic pump to the diverter valve can be arranged using the space formed between the engine and the radiator. By installing a hydraulic pump on one side of the engine and a diverter valve on the other side, the hydraulic piping does not protrude below the engine base and is free from mud during work. An object of the present invention is to provide a hydraulic piping device for a tractor that can reliably prevent damage caused by collisions, etc., and can also prevent hydraulic piping from becoming hot due to an increase in the temperature of pressure oil. .

Means for Solving the Problems In order to achieve the above objectives, the technical measures taken by the present invention are to install a hydraulic pump on one side of the engine mounted on the aircraft, and to install a diversion valve on the other side of the engine. The work equipment piping and power steering piping that are connected to the diversion valve are concentrated on the side of the engine base on the opposite side of the hydraulic pump, and the piping from the hydraulic pump to the diversion valve is cooled. It is characterized by being located above the engine base below the lower end of the fan.

Function of the invention Next, the function of the invention configured as described above will be explained. The pressure oil that is pumped from the hydraulic pump installed on one side of the engine is branched by a flow divider valve to the hydraulic system for lifting and lowering the work equipment and the hydraulic line for power steering, so that the work equipment installed on the tractor can be used as desired. It is possible to carry out agricultural work smoothly by running in the field while maintaining the height at the desired height. Since the hydraulic pump is installed on one side of the engine and the diverter valve is installed on the other side of the engine, the work equipment piping and power steering piping can be placed close to one side of the engine base for a compact arrangement. As a result, the equipment can be arranged in a well-balanced state. In addition, the piping located above the engine base below the bottom end of the cooling fan is located in the space formed between the front of the engine and the rear of the radiator, so it does not obstruct the airflow from the cooling fan in any way. Since it does not protrude below the fuselage, there is no risk of it being damaged by hitting mud. Since the space formed between the front surface of the engine and the rear surface of the radiator is maintained at a low ambient temperature, it is possible to prevent the pressure oil from rising in temperature and causing the hydraulic piping to become hot.

Embodiment An embodiment of the present invention will be described based on the attached drawings. Reference numeral 1 represents an engine base of an agricultural tractor, and a hydraulic pump 3 is mounted on one side of an engine 2 mounted on the engine base 1. It is installed.
Reference numeral 4 denotes a flow dividing valve, which is disposed on the opposite side of the engine 2 to which the hydraulic pump 3 is mounted. A work equipment piping 7 is attached to one pressure oil outlet 5, which is connected to a hydraulic device 6 for raising and lowering a work implement (not shown) attached to the rear of the tractor, and the other outlet 8 is A power steering pipe 10 connected to a power steering device 9 mounted on the front part of the engine base 1 for steering the front wheels is attached, and the working machine pipe 7 and the power steering pipe 10 are connected to a hydraulic pump. They are concentrated on the side of the engine base 1 opposite to the engine base 3.

11 is a radiator mounted on the engine base 1 in front of the engine 2; 12 is a cooling fan that rotates in conjunction with the engine 2; A space 13 is formed on the upper side. A hydraulic pump 3 is provided in the space 13.
The piping 14 from the engine base 1 to the diverter valve 4 is connected to the engine base 1.
The cooling fan 12 is disposed along the upper surface below the lower end of the cooling fan 12 in the left-right direction. 15 is the power steering device 9 and transmission oil reservoir 16
17 is the oil reservoir 16
18 is an oil filter, and 19 is a shroud of the cooling fan 12.

In the above configuration, while the tractor is running, pressure oil is pumped from the hydraulic pump 3 attached to one side of the engine 2, and is sent to the diversion valve 4 through the pipe 14 to raise and lower the work equipment. The work equipment pipe 7 connected to the hydraulic system 6 and the steering pipe 10 connected to the power steering system 9 are branched and sent, so the work equipment attached to the tractor can be maintained at the desired height. You can drive around the field and perform agricultural work smoothly. The hydraulic pump 3 is mounted on one side of the engine 2, and the diverter valve 4 is disposed on the opposite side.
The work equipment piping 7 and the power steering piping 9, which are connected to the engine base 1, can be centrally arranged on one side of the engine base 1 in a compact manner, resulting in a well-balanced arrangement of equipment installed on the aircraft. A favorable state can be achieved. The piping 14 from the hydraulic pump 3 to the diverter valve 4 is connected to the front of the engine 2 and the radiator 1 on the upper side of the engine base 1.
The cooling fan 12 is disposed in a space 13 formed between the rear surfaces of the cooling fan 12, so that it extends from one side of the engine 2 across the engine base 1 to the opposite side. While the piping 14
Since the cooling fan 12 does not obstruct the air blowing of the cooling fan 12 and does not protrude downward from the fuselage, there is no risk of damage due to contact with mud during work. Furthermore, the space 13 formed by the front surface of the engine 2 and the rear surface of the radiator 11 is always kept at a relatively low atmospheric temperature by the air blowing from the cooling fan 12 that rotates in conjunction with the engine 2. The pipe 14 disposed within the space 13 can prevent the temperature of the pressure oil from rising to a high temperature.

Effects of the Invention In short, the present invention has a hydraulic pump installed on one side of the engine mounted on the machine body, a diverter valve provided on the other side of the engine, and work equipment piping connected to the diverter valve. The power steering piping is concentrated on the side of the engine base opposite to the hydraulic pump, and the piping from the hydraulic pump to the diverter valve is placed below the bottom end of the cooling fan and above the engine base. The pump and diverter valve can be placed in a well-balanced manner on one side of the engine and on the opposite side, and the work equipment piping and power steering piping connected to the diverter valve are concentrated on one side of the engine base, making it more compact. can be placed in In addition, the piping between the hydraulic pump and the diverter valve runs from one side of the engine across the engine base to the other side, but it is located below the bottom end of the cooling fan and above the engine base. Since the piping does not impede the air flow of the cooling fan in any way and does not protrude downward from the aircraft body, there is no risk of it being damaged by contact with mud or the like during work. The space formed between the front surface of the engine and the rear surface of the radiator is always kept at a relatively low ambient temperature by the cooling fan, so the pipes located within this space are kept at the temperature of the pressure oil. This has very useful practical effects, such as being able to prevent the temperature from rising and reaching high temperatures.

[Brief explanation of drawings]

The drawings show an embodiment of a hydraulic piping system for a tractor according to the present invention, with FIG. 1 being a plan view and FIG. 2 being a side view. In the figure, 1...Engine base, 2...Engine, 3...Hydraulic pump, 4...Diversion valve, 13...
Space part 14... Piping.

Claims (1)

[Scope of utility model registration request] A hydraulic pump is installed on one side of the engine mounted on the aircraft, a diversion valve is installed on the other side of the engine, and the work equipment piping and power steering piping connected to the diversion valve are installed on the opposite side of the hydraulic pump. A hydraulic piping system for a tractor, characterized in that the piping from the hydraulic pump to the diverter valve is arranged at the upper part of the engine base below the lower end of the cooling fan.