JPS6139084Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for an internal combustion engine, such as a pressure cover for a radiator in an automobile.

The structure of a conventional pressurized lid made of synthetic resin is as shown in Fig. 1, in which a guide portion 2a and a claw portion 2b are integrally molded on a cap body 2 that is attached to and removed from a metal water inlet 1. The pressure valve body 3 is guided by the guide portion 2a under the pressure of the pressure spring 4, and the negative pressure valve 7 is moved by a cylindrical shaft guide 6 that presses the pressure valve body 3 and the packing 5 that contacts the lower surface of the pressure valve body 3.
By screwing the cap body 2 into the water inlet 1 and bringing it into contact with the outer periphery of the water inlet 1 with the claw portion 2b, the lower surface of the cap body 2 is guided under the pressure of the negative pressure spring 8.
The water inlet 1 is pressed against the upper surface of the water inlet 1 to maintain the inside under pressure.

In the above-mentioned conventional type, the claw portion 2b of the synthetic resin cap body 2 that comes into contact with the metal water inlet 1 may wear out after being attached and detached several times, reducing its performance as a pressurizing lid. .

The present invention has been improved on this point, and an example of its implementation will be explained with reference to FIG. 2.The difference from the case of FIG. The rest is the same except that it is composed of a main body 10 and a guide body 11 made of synthetic resin. The cap body 10 has a claw portion 10 at the bottom.
Several inward protrusions 10b are provided which contact the lower surface 11a of the head of the guide body 11 so as to form a shape a and rotatably support the guide body 11.

Since the cap body 10 according to the present invention is made of metal, the claw portion 10a, which is the contact surface with the water inlet 1, does not wear out and can withstand long-term use. Moreover, it has a simple structure and can be manufactured at low cost, and its practicality is remarkable.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a conventional pressurizing lid, and FIG. 2 is a longitudinal cross-sectional view of a pressurizing lid that is an example of the implementation of the present invention. The symbols in the drawings indicate the following members, respectively. 1: Water inlet, 2: Cap body, 2a: Guide part, 2
b: Claw portion, 3: Pressure valve body, 4: Pressure spring,
5: Gasket, 6: Shaft guide, 7: Negative pressure valve, 8: Negative pressure spring, 9: Seal gasket,
10: Cap body, 10a: Claw portion, 10b: Inward projection, 11: Guide body, 11a: Lower surface of head.

Claims (1)

[Scope of utility model registration request] The guide body 11 is a cylindrical body made of synthetic resin and has a head 11a that closes its upper end protruding from the outer periphery in the form of a flange. Between the pressurizing valve body 3, which is slidably fitted into the cylindrical part and prevented from moving downward by the engaging stepped part, and the flange-shaped head 11a of the guide body 11 and the upper surface of the water inlet 1. A seal gasket 9 is provided, a gasket 5 is provided between the pressurizing valve body 3 and the water inlet step, and a seal gasket 5 is provided on the outer periphery of the center hole of the pressurizing valve body 3 and the gasket 5 to connect them. a cylindrical shaft guide 6;
A negative pressure valve 7 is provided with a valve provided at the lower end of a shaft that is movable up and down in the shaft guide 6 in contact with the lower surface of the packing 5 to close the center hole, and a negative pressure valve 7 is provided in the guide body 11 and the pressurizing valve body 3. A pressure spring 4 provided therein and a negative pressure spring 8 that biases the negative pressure valve 7 in the closing direction are provided, and a metal cylindrical body is rotatable so as to cover the upper surface of the guide body 11. and an inward protrusion 1 on the side thereof.
0b, the flange-shaped head 1 of the guide body 11
1. A pressurizing lid for an internal combustion engine cooling device, characterized in that a cap body 10 is provided to support the lower surface of the cap body 1a, and a claw portion 10a is formed on the lower surface of the cap body 10 to come into contact with the outer periphery of a water inlet.