JPH0327015Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reservoir for storing hydraulic fluid to be supplied to a hydraulic cylinder or the like.

[Conventional technology]

As shown in Japanese Utility Model Application No. 60-157571, for example, this type of reservoir stores hydraulic fluid to be supplied to the master cylinder of a vehicle brake, etc.
The upper opening of the cylindrical liquid tank is liquid-tightly closed off by a diaphragm that descends as the liquid level drops due to a decrease in hydraulic fluid.In addition, in order to warn of a decrease in hydraulic fluid, a hydraulic fluid is installed in the tank. There is a disc-shaped float inside that moves up and down as the hydraulic fluid increases, and when the float approaches the reed switch located at the bottom of the liquid tank as the working fluid decreases, a magnet installed in the float activates the reed switch. There are some that warn you by turning on a lamp or the like.

[Problem that the invention attempts to solve]

However, when assembling the brake system to the vehicle body or during maintenance, even if you try to send hydraulic fluid under high pressure to piping or wheel cylinders, with the reservoir structure described above, the pressure feeding jig cannot be attached to the reservoir unless the float is removed. First, the work is troublesome, and there are times when the removed float is forgotten to be put back in.

Therefore, an object of the present invention is to provide a reservoir to which a pumping jig can be attached without removing the float.

[Means for solving problems]

In order to achieve the above object, the present invention liquid-tightly closes the upper opening of the liquid tank with a flexible membrane such as a diaphragm, and also incorporates a float inside the liquid tank to operate the reed switch of the liquid level warning device. In the approximately cylindrical reservoir, a float chamber for accommodating the float movably in the vertical direction is provided in one side of the liquid tank and protrudes radially outward from the reservoir mounting boss, and the float It is characterized in that the reed switch is disposed below the chamber.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to a reservoir of a tandem type master cylinder will be described based on the drawings.

In the master cylinder 1, a primary piston 3 is liquid-tightly and movably fitted into the rear open side of a cylinder hole 2 to define a first hydraulic chamber 4 in front of the primary piston 3, and a secondary piston 5 is liquid-tightly and movably inserted in the rear open side of the cylinder hole 2 to define a first hydraulic chamber 4 in front of the primary piston 3. A second hydraulic pressure chamber 6 is defined between the tips of the cylinder hole 2 by being tightly and movably inserted into the cylinder hole 2.
A reservoir attachment boss portion 10 defined in the liquid reservoir chamber 8 and the second liquid reservoir chamber 9 is integrally formed.
It is tightened by.

The reservoir 11 is provided with the reservoir mounting boss 10 at the lower part of the bottom of the approximately cylindrical liquid tank 13 made of synthetic resin.
A mounting portion 14 that fits externally is integrally formed,
At the upper opening of the liquid tank 13, a diaphragm 15 made of a flexible material such as rubber is held between the upper opening end of the liquid tank 13 and a lid 16 screwed over the upper opening of the liquid tank 13. , the upper opening of the liquid tank 13 is closed liquid-tightly.

Further, a pressure feeding jig receiver 17 is formed around the bottom opening of the liquid tank 13, and four ribs 18 for guiding the pressure feeding jig are formed on the side wall of the liquid tank 13 at equal intervals in the vertical direction.
The book is formed.

Furthermore, a magnet 19 is attached to the side wall of the liquid tank 13.
A float chamber 21 for storing a float 20 having a float 20 at its lower part projects radially outward from the reservoir mounting boss portion 10 and is connected to the float chamber 21 . A housing portion 23 for the switch 22 is formed.

The float chamber 21 has a box shape with an opening on the liquid tank 13 side, and has a height that allows the float 20 to move up and down as the hydraulic fluid increases and decreases. Two ribs 1 of tank 13
8 and 18 are provided with float retaining plates 24 whose respective ends are locked to prevent the float 20 from coming out from the float chamber 21 into the liquid tank 13.

With this configuration, the float 20
The diaphragm 1 moves up and down in the float chamber 21 on the side of the liquid tank 13 as the working fluid increases and decreases.
5, and the pumping jig can be attached to the reservoir 11 without removing the float 20 during high-pressure pumping work of hydraulic fluid. No more forgetting to put it in. In addition, since the liquid tank 13 and the float chamber 21 are connected, both can be molded into one piece.
Furthermore, by providing the reed switch storage section 23 below the float chamber 21, the capacity of the liquid tank 13 does not need to be increased.

[Effect of idea]

As described above, the present invention has a float chamber connected to the side of the liquid tank of the reservoir in which the float that operates the reed switch of the liquid level warning device is movably housed in the vertical direction, and the lower part of the float chamber is Since the reed switch is provided, the float moves up and down as the hydraulic fluid increases or decreases in the float chamber on the side of the liquid tank, and does not interfere with the lowering of the diaphragm. During high-pressure pumping work, the pumping jig can be attached to the reservoir without removing the float, improving work efficiency and
There is no need to forget to put in the removed float as in the past. In addition, the float chamber is connected to one side of the liquid tank, protruding radially outward from the reservoir mounting boss, so the liquid tank and float chamber can be manufactured in one step without using any means such as welding. Since it can be made by molding, manufacturing costs can be reduced.Furthermore, since the reed switch is disposed below the float chamber, the capacity of the liquid tank does not need to be increased.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a sectional front view of a reservoir attached to a tandem type master cylinder, Fig. 2 is a cross-sectional view taken from Fig. 1,
FIG. 3 is a cross-sectional view taken from FIG. 1. 1...Master cylinder, 11...Reservoir, 1
3...Liquid tank, 15...Diaphragm, 20...Float, 21...Float chamber, 22...Reed switch, 23...Reed switch storage section.

Claims (1)

[Scope of utility model registration request] In the approximately cylindrical reservoir, the upper opening of the liquid tank is liquid-tightly closed with a flexible membrane such as a diaphragm, and a float is installed inside the liquid tank to operate a reed switch of a liquid level reduction warning device. A float chamber for accommodating the float movably in the vertical direction is provided on one side of the liquid tank and protrudes radially outward from the reservoir mounting boss, and the reed switch is disposed below the float chamber. A reservoir characterized by the following features: