JPS609072Y2 - Hydraulic piping system in vehicles - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hydraulic piping system for a vehicle equipped with a large number of hydraulic equipment, such as a construction vehicle.

In general, in road paving construction vehicles, in addition to the hydraulic equipment used for the power steering system, hydraulic transmission system, etc. related to the driving operation of the vehicle itself, a large number of hydraulic equipment for work are collectively installed in the engine room. In addition, since each component is scattered in various places, the piping between them becomes long, requiring piping space and becoming extremely complicated.

Therefore, maintenance work such as inspecting and repairing parts in the engine room is difficult, and work efficiency is extremely low.

The present invention aims to eliminate the above-mentioned drawbacks and to provide a simplified hydraulic piping system.

Next, the configuration will be specifically explained with reference to the drawings.

As shown in Figure 1, the road paving vehicle implementing this invention is
A main body 1 in which driving central functions such as an engine, a power steering device, and a hydraulic transmission device are mounted above the drive rear wheels 13; a frame 2 on which the main body 1 is installed; There is a hopper 3 which accommodates paving materials such as, etc., and which is rotated inwardly by left and right cylinders 15 and 16 pivotally supported on the frame 2 near the front wheel 14, and a hopper 3 at the bottom of the hopper 3. a conveyor 4 that extends to the rear of the main body 1; a paving material discharge port 5 formed at the end of the conveyor 4; a screw feeder 7 supported by a bracket 6; and a cylinder 17 located rearward of the screw feeder 7 and pivotally supported at the bottom of the driver's seat protruding from the main body 1.
The press member 12 is suspended movably up and down by 18 degrees.

Note that the pressing member 12 is a horizontal adjustment tool held at the rear end of the arm 8 which is pivotally supported by a cylinder 19.20 fixed to the lower part of the front wall of the main body 1 so that the shaft position can be adjusted up and down. 9, the bracket 10 protruding from the arm 8 is rotated around the support shaft 11, and the level of the lower surface thereof is adjusted.

Engine compartment 2 of a road paving vehicle with the above configuration
The piping system of the hydraulic equipment in 5 is shown in Figure 2.

As shown in the figure, an oil tank 23 and a fuel tank 24 are built into the left and right sides of the main body 1 above the rear wheel 13, respectively, and an engine room 25 is formed in the middle thereof.

28 is a hydraulic pump for traveling, and is located in the engine room 25.
The engine 30 is directly connected to the engine 30 which is fixedly installed in the center of the engine room 25, and the oil is directly connected to the engine 30 which is fixedly installed in the center of the engine room 25.
It is sent to a hydraulic motor 31 fixed to the bottom of the main body 1 on the side.

The hydraulic motor 31 is connected to a gear transmission 32. It is linked to the rear wheel 13 via a differential device 33 and a chain 34.

35 is a hydraulic pump for the power steering system, which is directly connected to the engine 30 at a position opposite to the traveling hydraulic pump 28, and supplies oil from the oil tank 23 through a suction filter 27 installed below the oil tank 23 to the engine room 25. Flow divider 36 mounted on the side wall. It is sent to the steering cylinder 45 which is pivotally supported on the frame 2 near the front wheel 14 through the solenoid valve 37 and the switching valve 44 located at the bottom of the steering handle 38 and fixed to the main body 1. It is also sent to cylinders 15, 16 and 17, 18.

Further, the oil branched at the flow divider 36 is
It is sent to the cylinders 19, 20 through a solenoid valve 46 attached to the side wall of the engine room 25 behind the flow divider 36.

50 and 51 are left and right feeders 7a and 7b, respectively.
A driving hydraulic motor is fixed to the bottom of the engine room 25, and a hydraulic pump 52 that is fixed to the side of the engine 30 and driven by the engine 30 is attached to the front wall and side wall of the engine room 25, respectively. The oil is sent through the flow divider 53 and the solenoid valve 54.

Reference numeral 55 denotes a hydraulic motor for vibrating the pressing member 12, which is built into the pressing member 12, and is supplied with oil via the solenoid valve 54 by the hydraulic pump 35.

Reference numeral 56 denotes a manifold, which is located around the engine 30 from a position opposite to the gear transmission 32 at the rear of the engine 30 to the front side of the engine 30, and extends to the vicinity corresponding to each hydraulic device attached to the side wall of the engine room 25. It is fixed to the bottom of the main body 1.

Further, the manifold 56 has one end communicating with the upper surface of the oil tank 23, and connects an oil drain pipe 57 from each hydraulic device at a position close to the hydraulic device, as shown by a broken line in the figure.

Therefore, the drained oil from each hydraulic device passes through the manifold 56 and returns into the oil tank 23.

As is clear from the above, the device according to the present invention communicates with a part of the oil tank in a vehicle equipped with a large number of hydraulic devices in the engine room, and extends approximately corresponding to the arrangement of each of the hydraulic devices. A conventional manifold is installed in the engine room, and oil drain pipes returning from the hydraulic equipment to the oil tank are connected to the manifolds.

According to the present invention, the oil drain pipes from each hydraulic device are not connected directly to the oil tank, but are connected to a manifold that extends close to the hydraulic device, reducing the length of the pipes and reducing the number of intersections. It has many benefits, such as making the piping more orderly and making maintenance work such as inspecting and repairing parts in the engine room much easier and more efficient.

In addition, conventionally, if an oil filter was to be installed in the circuit that returns to the oil tank, it would have been necessary to install it in parallel for each oil drain pipe, but with this invention, only one oil filter is needed, which is economical. It also has the advantage of saving installation space.

Furthermore, the present invention divides the circuit from the manifold to the oil tank and inserts a throttle valve into one circuit.
By interposing an oil cooler in the other circuit, it is possible to adjust the temperature of the oil to an appropriate temperature, which is extremely practical.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of a road paving vehicle incorporating the device according to the present invention, and FIG. 2 is a piping system diagram showing the main parts of the device according to the present invention in the engine compartment. 1...Main body, 2...Frame, 23.
... Oil tank, 24 ... Fuel tank, 25 ... Engine room, 26, 27
...Suction filter, 30...Engine, 44...Switching valve, 28.35.5
2...Hydraulic pump, 31,50,51.55.
...Hydraulic motor, 37.46.54...
Solenoid valve, 36.53...Flow divider, 56...Manifold, 57...
...Oil drain pipe.

Claims (1)

[Scope of utility model registration request] In a vehicle equipped with a large number of hydraulic devices in the engine room, a manifold is provided in the engine room that communicates with a part of the oil tank and extends approximately corresponding to the arrangement of each of the hydraulic devices, and the manifold is connected to the manifold. A hydraulic piping system for a vehicle, characterized in that oil drain pipes returning from the hydraulic equipment to an oil tank are connected to each other.