JPS6034524Y2 - Brake fluid level warning device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a brake fluid level warning device for a vehicle.

As shown in Fig. 1, a conventional brake fluid level warning device installed in a vehicle brake hydraulic fluid reservoir tank has a magnetically actuated switch 03 built into a hanging support 02 provided on a cap 01 of the tank. A float 04, which can be guided and moved up and down, is loosely fitted to the column, and a magnet 05 whose poles are positioned to sandwich the column is attached to the float.
is installed.

Brake hydraulic fluid is often pushed to the side of the tank due to the acceleration G of vehicle motion, so the alarm transmitting device should be installed in the center of the tank or with a partition plate installed on the tank to avoid false alarms. As a general rule, the transmitter is installed on the side.

The one shown in FIG. 1 above is generally convenient in that the cap 01 is located at the center of the tank, but in the case of a closed type brake fluid system, the diaphragm is located near the same position, which is a problem in terms of space.

The one shown in Fig. 2 uses a transmitter similar to Fig.
It is installed on a support hanging from the tank ceiling wall in a small compartment 08 on the side of the tank that is partitioned by a special partition plate 07 with a partition plate 07.A partition plate 09 is also installed in the center of the tank. However, even with this method, the inclination of the liquid level due to acceleration cannot be completely removed, so this type of alarm device not only cannot avoid false alarms, but also has a complicated structure.

The present invention was made in order to eliminate the drawbacks of the conventional ones described above.The float with a magnet, which has an inverted U-shaped cross section, is placed in a manner such that its legs straddle a partition plate provided in the center of the tank, and the float is guided up and down by the partition plate. To provide a brake fluid level warning device configured to be movable and provided with a magnetically actuated switch on the lower surface of a bottom plate of a tank.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

As shown in FIGS. 3 and 4, the reservoir tank 1 is made of a non-magnetic conductive material such as plastic, and is divided into two parts by a partition plate 2 running in the front-rear direction at the center thereof.

However, a through hole (not shown) is provided in the lower part of the partition plate 2, so that the brake fluid in the divided tank 3.4 can be exchanged with each other under a certain resistance.

A float 5 made of a non-magnetic conductive material and having an inverted U-shaped cross section is placed in the center of the tank 1 with its legs 6a and 6b straddling the partition plate 2 with a gap left therebetween, and the float 5 is placed between the legs 6a and 6b so as to straddle the partition plate 2. It is possible to move up and down while being guided by the partition plate 2.

The float 5 has magnets 8arab facing each other at the bottom of both legs, and the magnets 8a.

The positive and negative polarities of 8b are arranged in opposite positions across the partition plate 2, in other words, in antisymmetric positions.

Further, a vertically long slit 9 is provided in the leg 6a of the float in the vertical direction, and a stopper 1 is provided protruding from the side surface of the partition plate 2.
0 is accepted.

Therefore, the contact between the stopper 10 and the lower side of the slit 9 regulates the upper limit of the float operation to prevent the float from rising excessively, and the contact between the stopper 10 and the upper side of the slit 9 restricts the upper limit of the float operation. to prevent unnecessary impact contact between the float and the tank bottom plate.

In the figure, foot 5' and hydraulic fluid level 7' are indicated by broken lines.
indicates the upper limit of float operation.

The reason why the notch 2' is provided in the partition plate 2 and the float 5 is placed astride this part is because if a diaphragm required for a sealed tank is installed directly above these parts, the float operation will be difficult. This is to keep the upper limit as low as possible, and therefore, this cutout is not necessary in open tanks, but even in closed tanks, due to the shape of the tank etc. There are some things.

A pocket 11 is provided on the lower surface of the bottom of the tank 1, and a magnetically actuated switch 12 is positioned and fixed therein so as to face the magnet 8 at the float lower limit position.

The switch 12 is connected in series with a power source 13 outside the tank and a warning light 14 by a lead.

The magnetically actuated switch 12 of this embodiment is installed in the pocket shown in the drawing at the position shown in the drawing in the attitude shown in the drawing, but the present invention is not limited to the above. In this case, the switch 12 should receive the maximum amount of magnetic flux from the lines of magnetic force connecting both magnets when the switch is in the brake fluid level warning position.Based on this, the shape of the pocket, the position and posture of the switch can be freely changed. can be changed to .

The magnetic force actuation switch 12 is adjusted by its adjusting means so that it is in a closed state by the magnetic flux of the magnetic lines of force when the float 5 is below the set alarm position, and in a closed state when the magnetic flux is less than the above.

Further, in this embodiment, the stopper 10 for regulating the vertical movement of the float was provided protruding from the side surface of the partition plate, but the present invention is not limited thereto. For example, as shown in FIG. Lot 1 was installed and passed through float 5.
A wide stopper 10' is formed or attached to the top of the tank to restrict the upper limit of float movement, and a stopper 10' is formed or attached to the top of the tank to restrict the upper limit of float movement, and as shown in FIG. It is also possible to form or attach a wide stopper 10' to restrict the upper limit of movement of the float.

Although the main stage for regulating the lower limit of float movement is omitted in the embodiments shown in FIGS. 5 and 6, it is clear that the float movement can be regulated by means similar to the upper limit regulating means.

Since the present invention is constructed as described above, when the brake fluid level 7 in the tank drops below the warning level, the float 5 also lowers to the set alarm position and the magnet approaches the switch, so that the magnetic field lines from the magnet 8 are removed. The required magnetic flux operates the magnetic force activation switch 12 to close the warning light 1.
4 lights up to warn the occupants that the brake fluid level is abnormally low.

If the tank holds more hydraulic fluid than the warning level, the float rises and the magnetic flux becomes insufficient to close the switch, so the switch is automatically opened and the warning light is turned off.

Since the tank of this device has a partition plate running through the center, and the float is installed at the center of the tank, there is little inclination of the brake fluid level due to vehicle movement, and even if there is an inclination, the float Since it is located at the center of the surface, it maintains a position equivalent to the average liquid level and does not cause false alarms to the alarm device.

In addition, although the float is located in the center of the tank, its upper limit of movement can be lower than that of the partition plate, and unlike conventional floats, there are no obstructions such as supports above, so the diaphragm can be installed in the upper space. Suitable for structures that

Furthermore, the structure and assembly of the present invention are simple, and there is no need for the complicated installation of a special support for guiding the float, unlike the conventional structure.

[Brief explanation of drawings]

Figures 1 and 2 show an example of a conventional brake fluid level warning device. Figure 1 is a side view of one in which a float is provided on a column protruding from the cap, and Figure 2 is a side view of one in which a float is provided on a support that projects from the cap. 3 to 6 show embodiments of the present invention, and FIG. 3 is a sectional view of the device along a plane perpendicular to the tank partition plate, and FIG. is a sectional view taken along the line IV--IV in FIG. 3, and FIGS. 5a and 5b and 6a and 6b are explanatory views of stoppers different from those in FIG. 3. 1: Reservoir tank, 2: Partition plate, : Float, 6°6a. 6b=leg, 8°8d. 8b: Magnet, 12: Magnetic activation switch, 13: Power supply, 14: Warning light.

Claims (1)

[Scope of utility model registration request] In a reservoir tank for vehicle brake hydraulic fluid, a float having an inverted U-shaped cross section with a magnet held at the bottom of each leg has a vertical partition plate running in the center of the reservoir tank sandwiched between the legs with a gap between the floats, and the partition A brake fluid level warning device configured to be movable up and down guided by a plate, and comprising a magnetically actuated switch connected in series to a power source and a warning light, and provided on the lower surface of the bottom of the reservoir tank facing the magnet. .