JP3018611U - Radiator water supply cap - Google Patents

Abstract

(57) [Summary] [Purpose] A water supply cap for a radiator for an automobile, whose axial length is made as short as possible. [Structure] A spiral coil spring 9 is arranged between a positive pressure valve 6 provided on a cap body 3 and a tubular body 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a water supply cap that is detachably locked to a filler neck protruding from the upper end of an automobile radiator.

[0002]

[Prior art]

 A filler neck is projected from the upper end of the tank of the radiator for cooling the engine cooling water, and the water supply cap is detachably locked to the upper end opening of the filler neck. This water supply cap is composed of a cap body, a closing plate provided on the inner surface of the cap body, a cylindrical body with an upper end closed provided on the lower surface side of the closing plate, and the cylindrical body. A positive pressure valve that opens and closes the neck opening of the filler neck and a central hole of the positive pressure valve are opened and closed via a compression type coil spring that is fitted vertically and elastically elastically. , A negative pressure valve installed in its center hole so as to be vertically movable.

This compression coil spring presses the positive pressure valve into the neck portion opening of the filler neck by its elastic force. The pressure inside the radiator tank is kept above atmospheric pressure while the engine is running, and the temperature difference between the cooling air flowing through the radiator and the engine cooling water is increased to improve heat exchange performance. . In addition, when the pressure inside the tank rises above a certain level, the positive pressure valve is opened, and part of the steam and cooling water in the tank is guided to the surge tank from the pipe protruding from the outer circumference of the filler neck. Then, when the inside of the tank is cooled for a while after the engine is stopped, a part of the cooling water in the surge tank returns to the inside of the tank via the negative pressure valve.

[0004]

[Problems to be solved by the device]

 Since a large number of various devices are installed in the engine room of the automobile in which the radiator is installed, it has been desired to reduce the size and weight of the radiator itself. In particular, it has been desired to keep the height of the filler neck protruding at the upper end of the tank low. However, a water supply cap was removably attached to the upper end of the filler neck, and the water supply cap was provided with a positive pressure valve and a negative pressure valve having coil springs installed therein, so that a certain height or more was required. This is because the compression type coil spring that elastically oscillates the positive pressure valve is formed in a spiral shape with the same radius as if it was wound around the outer circumference of the cylindrical body. The product was more than the product of the wire diameter and the coil spring storage height was absolutely necessary. Then, this invention aims at providing the thing which can further reduce the height in such a water supply cap, and takes the following structures in order to achieve the objective.

[0005]

[Means for Solving the Problems]

 The water supply cap for a radiator of the present invention comprises a cap body 3 which is detachably engaged with an upper end opening 2 of a filler neck 1 of the radiator, and an inner surface of the cap body 3, which is elastically attached to the upper end opening 2. A closing plate 4 that is in liquid-tight contact, a cylindrical body 5 that is located on the lower surface side of the closing plate 4 and that is closed at the upper end of the main body 3, and is vertically movably fitted to the cylindrical body 5. The positive pressure valve 6 that opens and closes the neck portion opening 23 of the filler neck 1 through the compression type coil panel that springs outward in the axial direction and the central hole 7 of the positive pressure valve 6 are opened and closed. And a negative pressure valve 8 vertically movably installed in the central hole 7 thereof, wherein the coil spring is composed of a spiral coil spring 9 and the compression thereof causes the inner one to be fitted into the outer spiral portion. Composed in Those were.

[0006]

【Example】

 Next, each embodiment of the present invention will be described with reference to the drawings. 1 to 6 are plan views of the cap body 3 of the water supply cap according to the first to sixth embodiments of the present invention. 7 is a front view of FIGS. 1 to 5, and FIG. 8 is a front view of FIG. Further, FIG. 9 is a cross-sectional view of FIGS. 1 to 5, viewed from the IX-IX direction in FIGS. Further, FIG. 10 is a cross-sectional view taken along the line XX of FIG. The water supply cap of the present invention has a cap body 3, a closing plate 4, a tubular body 5, a positive pressure valve 6 and a negative pressure valve 8. The cap body 3 is formed in an inverted dish shape with its peripheral edge lowered, and a claw portion 21 is bent inward as shown in FIG. This claw portion 21 is inserted into the lower surface side of the flange from a not-shown notch provided in a part of the flange of the upper end opening 2 of the filler neck 1 in FIG. 9, and the claw portion 21 is rotated by the rotation of the cap body 3. It is locked to a cam part (not shown) on the bottom surface of the flange.

Various types of planar shapes of the cap body 3 can be considered as shown in FIGS. 1 to 6. Except for the embodiment shown in FIG. 6, these basic forms have a short axis and a long axis, have a substantially circular portion on the short axis side, and have irregularly shaped protrusions 20 projecting on the long axis side. Has been formed. Further, in the embodiment of FIG. 6, a gear-shaped protruding portion 20 is formed in a bent shape on the outer periphery of the cap body 3. These raised portions 20 serve as a slip stopper when the cap body 3 is manually rotated for attachment and detachment. As shown in FIG. 9, a small plate 11 is fitted in the center hole of the cap body 3 so as to be rotatable around its axis. The center of the closed end of the tubular body 5 is welded and fixed to the lower surface of the small plate 11, and a blocking plate 4 is provided between the tubular body 5 and the inner surface of the cap body 3. The closing plate 4 is composed of a leaf spring 10 and a rubber plate 12, and the rubber plate 12 is crimped onto the upper end opening 2 of the filler neck 1 so as to be openable and closable. The positive pressure valve 6 is fitted in the tubular body 5, and the flange portion 14 provided on the outer periphery of the upper end portion of the positive pressure valve 6 and the inner flange portion 15 provided on the inner surface of the lower end of the tubular body 5 come into contact with each other. , Stop the positive pressure valve 6 from coming off the tubular body 5 and stop.

A spiral coil spring 9 is provided between the bottom surface of the positive pressure valve 6 and the upper surface of the cylindrical body 5, and the upper and lower ends of the spiral coil spring 9 are the bottom surface of the positive pressure valve 6 and the upper surface of the cylindrical body 5. Sit down with. In this spiral coil spring 9, the spiral radius gradually increases as the spiral radius goes downward, and the radius of the adjacent spiral portion expands beyond the wire diameter. Therefore, when the spiral coil spring 9 is compressed, the inner ring part enters the outer ring part, and finally the whole ring becomes flat. As a result, the axial length in the cap in which the spiral coil spring 9 is housed is made as small as possible compared with a normal coil panel having the same elastic force. As a result, the axial length of the tubular body 5 and the positive pressure valve 6 mounted therein can be shortened, and the axial length of the water supply cap can be reduced as a whole. Then, the height of the filler neck 1 is lowered, and the height of the entire radiator is lowered, so that the size can be reduced. Next, a rubber plate 13 is attached to the lower surface of the positive pressure valve 6, a center hole 7 is provided in the center of the rubber plate 13, and a guide cylinder 17 is attached to the edge of the hole. The shaft portion of the negative pressure valve 8 is attached to the guide cylinder 17, and the retaining member 16 is attached to the upper end of the shaft portion.

[0009]

[Effect of device]

 The radiator water cap of the present invention is provided with a positive pressure valve 6 that opens and closes the neck opening 23 of the filler neck 1, and the compression type coil spring that elastically springs the positive pressure valve 6 outward is a spiral coil spring. It consists of 9. The compression allows the inner coil to be inserted into the outer spiral portion of the spiral coil spring 9, so that the spring storage length can be shortened. As a result, the axial length of the entire valve can be shortened, and the height of the filler neck 1 protruding above the radiator can be reduced by that amount, which can contribute to downsizing of the radiator.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a water cap of a radiator according to the present invention.

FIG. 2 is a plan view of the second embodiment.

FIG. 3 is a plan view of the third embodiment.

FIG. 4 is a plan view of the fourth embodiment.

FIG. 5 is a plan view of the fifth embodiment.

FIG. 6 is a plan view of the sixth embodiment.

FIG. 7 is a front view of each embodiment shown in FIGS.

8 is a front view of the embodiment shown in FIG.

9 is a sectional view taken along the line IX-IX of FIGS.

10 is a cross-sectional view taken along the line XX of FIG.

[Explanation of symbols]

 1 Filler neck 2 Upper end opening 3 Cap body 4 Closure plate 5 Cylindrical body 6 Positive pressure valve 7 Center hole 8 Negative pressure valve 9 Spiral coil spring 10 Leaf spring 11 Small plate 12 Rubber plate 13 Rubber plate 14 Collar part 15 Inner collar part 16 Missing Stopper 17 Guide tube 18 Tank 19 Recessed portion 20 Convex portion 21 Claw portion 22 Pipe 23 Neck opening

Claims (1)

[Scope of utility model registration request] 1. A cap body 3 removably engaged with an upper end opening 2 of a filler neck 1 of a radiator, and an upper end opening 2 provided on an inner surface of the cap body 3.
A closing plate 4 that elastically and liquid-tightly contacts with, a cylindrical body 5 that is located on the lower surface side of the closing plate 4 and that is closed at the upper end, and is vertically moved by the cylindrical body 5. The filler neck 1 is fitted via a compression coil spring that is freely fitted and elastically springs outward in the axial direction.
Positive pressure valve 6 that closes the neck opening 23 of the
And a negative pressure valve 8 installed in the central hole 7 so as to be vertically movable so as to open and close the central hole 7 of the positive pressure valve 6, in a water supply cap of a radiator, wherein the coil spring is a spiral coil spring 9. A radiator water cap made of, which compression is configured to fit the inner one into the outer spiral.