JPH0619421Y2 - Oil cooler for power steering - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an oil cooler for cooling working oil for a power steering device.

<Prior Art> A conventional oil cooler for a power steering apparatus guides a pipe for returning oil from a servo valve to a reservoir tank to a well-ventilated front surface of a radiator.

<Problems to be solved by the invention> There is a problem that the heat dissipation effect is not sufficient and the oil cannot be sufficiently cooled only by guiding the pipe to the front of the radiator.

<Means for Solving Problems> Therefore, in the present invention, the air cooling pipe connecting the servo valve and the pump or the servo valve and the reservoir tank is guided to the front of the vehicle, and the wire rod is spirally wound around the air cooling pipe. Fixed.

<Operation> When the oil flows through the air-cooling pipe, the heat of the oil is dissipated into the air through the pipe and the wire.

<Example> Hereinafter, an example of the present invention will be described. In FIG. 1, 10 is a pump, 11 is a rack and pinion type power steering device, and has a power cylinder 12 in the center and a servo valve 14 on the input shaft 13 side. A handle 16 and a handle shaft 17 are connected to the input shaft 13 via a universal joint 15. Discharge port 20 of pump 10 and servo valve 1
The supply port 21 of 4 is connected by the high pressure hose 22, and the distribution port 2
The pipes 3 and 24 are connected to the supply / discharge port of the power cylinder 12 by a pipe 25. One end of a pipe 27 is connected to the discharge port 26 of the servo valve 14, and this pipe is guided to the front surface of a radiator provided in the front part of the vehicle, is bent, and the other end is connected to the reservoir 10a. This pipe 2
As shown in FIG. 2, a wire rod 30 made of metal and having a trapezoidal cross section is spirally wound around the wire 7 and fixed to the wire 7 by welding or the like. A metal wire rod 30 is also spirally wound around and fixed to the bent portion of the pipe 27.

As another modification, as shown in FIG. 3, a wire material 31 having an L-shaped cross section may be spirally wound around and fixed to the pipe 27. As still another modification, a pipe in which a wire is spirally wound may be connected in the middle of a hose that connects the pump discharge port and the servo valve supply port.

<Effects of the Invention> As described above, according to the present invention, the air cooling pipe connecting the servo valve and the pump or the servo valve and the reservoir tank is guided to the front of the vehicle, and the wire is spirally wound around the air cooling pipe. Since it is attached and fixed, the wire rod can be easily wound around the circumference of the air-cooling pipe at a short pitch, thereby increasing the flow path resistance without increasing the installation space. Without
The heat dissipation area can be increased and the oil can be sufficiently cooled. Furthermore, since the wire rod can be spirally wound around and fixed to the bent portion of the air-cooling pipe, the effect of further increasing the heat radiation area can be obtained.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an overall view of a power steering apparatus, FIG. 2 is a sectional view showing a main portion, and FIG. 3 is a sectional view showing another embodiment. 10a ... Reservoir, 14 ... Servo valve, 27 ... Pipe, 30, 31 ... Wire.

Claims (1)

[Scope of utility model registration request] 1. An oil cooler for a power steering apparatus, wherein a servo valve is operated by rotation of an input shaft in accordance with a handle operation to guide a pump supply fluid to a power cylinder to assist a steering force, the servo valve and the pump. Alternatively, an air-cooling pipe connecting the servo valve and the reservoir is guided to the front of the vehicle, and a wire is spirally wound around and fixed to the air-cooling pipe to enhance the heat radiation effect. .