JPS6013725Y2 - Power steering oil cooling system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a power steering oil cooling device.

When a power steering system is installed in a small vehicle (passenger car or truck), the oil tank for the power steering cannot be made large enough due to various constraints such as the space in the engine room or the layout of parts of the chassis, so the pressure is increased by the oil pump. The heat of the heated oil affected the heat resistance and durability of the hoses in the oil circulation system.

The present invention was developed in view of the above points, and provides a device for cooling oil in a limited space.
To explain the structure in detail with reference to the drawings, 1 is the pump 2.
This is a conduit for feeding oil in the oil tank 3, and its tips are branched into branch pipes 4 and 5, which are connected to a power steering device 6 and a pressure control valve 7, respectively.

Therefore, the oil introduced through the branch pipe 4 causes the power forwarding device 6 to generate a steering output through its control valve section.

8.9 are conduits connected to the outlet ports of the power forwarding device 6 and the pressure control valve 7, respectively;
The oil discharged from the pipes 8 and 9 is further circulated through the pipes 8 and 9.
This is for refluxing the oil to the oil tank 3 via a conduit 10 at the tip of the oil tank 3.

Reference numeral 11 denotes a window washer fluid tank that includes the entire oil tank 3, and an oil filler port 31 that is integrated with the oil tank 3 is sandwiched between the tank top wall 11a to drain the oil in the oil tank 3 into the washer fluid. It is designed to be cooled by the liquid in the tank.

Further, the conduits 1 and 10 each pass through the upper wall 11a of the washer fluid tank 11 and are connected to the oil tank 3.

With the structure of the present invention as described above, when the oil in the oil tank 3 is fed from the pump 2 to the power advance device 6 and the pressure control valve 7, the pressure of the oil in the conduit 1 and the branch pipe 4.5 increases. The temperature of the oil will rise.

Furthermore, when the oil operates the piston in the power steering device 6, its temperature further rises, and the oil is discharged from the outlet of the steering device 6 while still at a high temperature, and is returned to the oil tank 3 through the four pipes 8 and 10. Return to

However, since the oil tank 3 is entirely contained within the washer fluid tank 11, it is cooled by the washer fluid and the temperature of the oil decreases.

According to the power steering oil cooling device of the present invention as described above, it is possible to easily cool the oil that has become hot due to pressure increase, and moreover, each mechanism can be effectively carried out within the limited space of the engine room or chassis frame. At the same time, the oil can be cooled.

Furthermore, there is no need to add new equipment or parts for cooling the oil, which does not increase costs.

In addition, in the oil cooling device of the present invention, as shown in FIGS. 2 and 3, the power steering oil tank and the window washer fluid tank are integrally formed, and the washer fluid tank 13 has a cylindrical shape in the center. It is also possible to provide a cylindrical wall 14, with the inner part serving as the oil tank part 15 and the outer part serving as the washer fluid tank part 12, so that the oil inside is cooled by the washer fluid on the outside. A similar effect can be obtained.

Further, as shown in FIG. 4, a window washer liquid tank 19 is disposed in the middle of a conduit 18 through which oil in an oil tank 17 is fed from a pump 16, and the conduit 18 is passed through the tank 19. The portion 18a of the conduit 18 inside the tank is spirally shaped so that the portion 18a of the conduit 18 is
The same effect as described above can be obtained even if the structure is such that a is cooled by washer fluid.

[Brief explanation of drawings]

Fig. 1 is an oil circulation system diagram showing a power steering oil cooling device of the present invention, Fig. 2 is a cross-sectional view of a window washer fluid tank showing another embodiment of the invention, and Fig. 3 is a diagram of a second embodiment of the window washer fluid tank. FIG. 4 is an oil circulation system diagram showing the embodiment of FIG. 3. 1... Conduit, 2... Pump, 3...
... Oil tank, 4, 5 ... Branch pipe, 6.
...Power steering device, 11...Window washer liquid tank, 15...Oil tank section, 16...Pump, 17... Oil tank, 18... Conduit, 19... Window osher tank.

Claims (1)

[Scope of utility model registration request] A power steering oil cooling device characterized in that a part of a power steering oil circulation system is disposed within a window washer fluid tank.