JPS61274224A - Liquid level detector equipped liquid tank - Google Patents

Abstract

PURPOSE:To obtain a tank profitable in liquid tightness also without requirement for diversified kinds of gauges even if different kinds of tanks are used, by integrating a part of the construction elements of a liquid quantity gauge with the tank. CONSTITUTION:A part of bottom surface 1a of a tank 1 is formed to project upward and this hollow convex part 2 represents an integrated part of the tank. An annular float 3 inserted into the tank 1 and fit free to move vertically in the projected part 2 is equipped inside with a ferrite magnet 4. A lead switch 5 installed in the hollow projection 2 is positioned in a lead switch mounting plug 5a and further, lead wires 6, 6 on the lead switch are provided. Further, on top of the tank 1 an oil inlet 1b is located with a cover 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a liquid tank with a liquid level detection device used in oil tanks, fuel tanks, etc. of automobiles and motorcycles.

(Prior Art) Conventionally, for example, an oil tank in a motorcycle has been provided with a liquid level detection device, that is, an oil level gauge, in order to detect the amount of oil in the tank.

However, in conventional tanks equipped with oil quantity gauges, the oil quantity gauge is inserted through a gauge mounting port provided at the top of the oil tank, as shown in, for example, Japanese Utility Model Publication No. 56-40620.

Such a conventional tank is schematically shown in FIG.

In the same figure, there is a gauge installation port 11 at the top of the tank 11.
A and an oil inlet 11b are installed, and a gauge 12 is inserted into the tank through the gauge attachment port 11a. This gauge 12 includes a guide member 12a, a float 13 fitted into the guide member 12a so as to be able to move up and down, and contacts 14a, 14b provided at the tip end of the guide member 12a and on opposing sides of the float 13, respectively. The lead wires 16 and 16 are connected to the ring-shaped contact 15 and the contacts 14a and 14b, respectively, and extend upward through the guide member 12a. Further, a lid 17 is provided on the oil inlet 11b. Further, although not shown in the drawings, an oil discharge port is provided at the bottom of the tank 11.

In a tank with an oil quantity gauge having such a configuration, the link 11
The liquid level 18 changes depending on the remaining amount of liquid such as oil injected therein, and accordingly, the flow 1 to 13 is guided by the guide member 12a and moves up and down. Then, when the liquid level 18 falls and the contacts 14a and 14b come into contact with each other through the contact 15, it can be detected via the lead wire 16 that the liquid level has decreased below a predetermined level.

However, in such a configuration, it is necessary to appropriately change the heights 1-12 of the gauges 12 each time the types of tanks 11 are different and the tank depth Hl is different, and many types of gauges must be prepared. Further, in order to attach a gauge, the tank 11 must be provided with a gauge attachment port 11a, and this portion also requires a seal to prevent liquid leakage.

Since it is necessary to prepare many types of gauges in this way, the cost is high, and there are also many sealing points to prevent liquid leakage, which is also disadvantageous.

(Object of the Invention) The present invention has been made in view of the above-mentioned conventional problems, and by molding a part of the component parts of the liquid volume gauge integrally with the tank, it can be used in many different types even when the types of tanks are different. The present invention provides a liquid tank with a liquid level detection device that does not require the preparation of a gauge, is inexpensive, and is advantageous in terms of preventing liquid leakage.

(Structure of the Invention) The present invention involves forming a hollow convex part by protruding a part of the bottom surface of a tank made of a non-magnetic material upward, and inserting an annular float having a magnet into the tank. The device is fitted into the convex portion so as to be able to rise and fall freely, and a reed switch is provided within the convex portion.

With this configuration, there is no need to provide a separate installation port in the tank for installing a liquid level detection device, that is, a gauge.
Furthermore, even if the tank depth is different, one type of gauge can be used.

(Example) Hereinafter, the present invention will be explained with reference to drawings showing embodiments.

In FIG. 1, reference numeral 1 denotes a tank made of a non-magnetic material such as polyethylene resin, and a hollow convex portion 2 is integrally formed with a portion of the bottom surface 1a of the tank 1 projecting upward. Reference numeral 3 denotes an annular float inserted into the tank 1 and fitted into the convex portion 2 so as to be movable up and down.The float 3 has a ferrite magnet 4 installed therein. Reference numeral 5 denotes a reed switch provided within the hollow convex portion 2. This reed switch 5 is provided within the reed switch mounting member 5a, and a lead wire 6.6 of the reed switch is provided. Further, an oil inlet 1b is provided in the upper part of the tank 1, and an M7 is covered with this oil inlet 1b.

In the above configuration, the liquid level 8 moves depending on the amount of liquid such as oil injected into the tank 1, and the float 3 is guided by the convex portion 2 and moves up and down accordingly. When the remaining amount i in the tank 1 decreases and the liquid level 8 falls below a predetermined level, the ferrite magnet 4 of the float 3 activates the reed switch 5, and therefore the tank 1 It is now possible to detect that the remaining amount within has fallen below a predetermined level.

If the tank 1 is an oil tank or a fuel tank, an oil or fuel supply port is provided at the bottom of the tank 1, but is not shown.

As mentioned above, the tank 1 does not have a special opening for installing the gauge, and therefore, compared to the conventional case where a separate gauge installation port is provided, reliability against oil leakage is improved. The road switch 5 constituting the gauge can be inserted into the hollow part of the convex part 2 from the bottom of the tank 1, so there is no need to prepare different types of gauges each time the depth of the tank is different. A switch body made of one type of reed switch 5 and a float 3 can be used for many types of tanks. Further, by providing a large number of reed switches 5, a plurality of liquid levels can be detected.

A convex portion 2 is provided directly below the inlet 1b of the tank, and the diameter of the inlet 1b is larger than the diameter of the float 3, and the height of the float 3 is similar to that of the lid 7. The interval between the upper ends of the section 2 is set to be larger than the interval between the upper ends of the section 2. With this configuration, the float 3 is inserted from the oil inlet 1b, but once the float 3 is fitted into the convex portion 2 and the lid 7 is overturned, the tank 1 may fall over. The float 3 is prevented from detaching from the convex portion 2 even when the float 3 is moved.

Figure 2 shows an electric circuit of a warning device using the above-mentioned gauge. In the figure, the reed switch 5, warning lamp 9 (or buzzer), and main switch 10 in the gauge are connected in series to the battery E. There is. With this circuit configuration, by keeping the main switch 10 ON, when the amount of liquid in the tank 1 reaches a predetermined level (liquid level height), the reed switch 5 turns ONL, and current is applied to the warning lamp 9. It is possible to warn that there is little flow or liquid remaining.

(Effects of the Invention) As described above, according to the present invention, a part of the bottom of the tank is made to protrude upward to form a convex part, and a float having a magnet is fitted into this convex part so as to be able to rise and fall freely. , and by providing a reed switch in the convex part, there is no need to insert the liquid level detection device from the installation opening at the top of the tank as in the past, and therefore there is no need to have a separate opening for the liquid level detection device. This improves reliability against oil leaks, and the reed switch that makes up the liquid level detection device only needs to be inserted into the convex part from the bottom of the tank, making it possible to use one type of tank for many types of tanks with different tank depths. The float and the switch body can be used as appropriate, and this has great effects such as cost reduction.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a liquid tank with a liquid level detection device according to an embodiment of the present invention, Fig. 2 is an electrical circuit diagram of a warning bag using the same liquid level detection device, and Fig. 3 is a conventional liquid level detection device. It is a sectional view showing an example of a liquid tank with a detection device. DESCRIPTION OF SYMBOLS 1... Tank, 1a... Bottom surface, 2... Convex part, 3
...Float, 4...Ferrite magnet, 5...Reed switch. Patent applicant: Yamaha Motor Co., Ltd. No. 1
Figure 2 Figure 3

Claims (1)

[Claims] 1. A part of the bottom of a tank made of non-magnetic material is made to protrude upward to form a hollow convex part, and an annular float with a magnet is inserted into the tank and can be raised and lowered into the convex part. 1. A liquid tank with a liquid level detection device, which is fitted into the convex portion and has a reed switch provided within the convex portion.