JP2558735Y2 - Reservoir tank - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reservoir tank for storing brake fluid.

[0002]

2. Description of the Related Art Conventionally, a hydraulic (hydraulic) brake device is provided with a master cylinder which acts to apply hydraulic pressure to a wheel cylinder or the like by operating a brake pedal. And such a brake device is provided with two pipes,
As the two-system piping, there are two types, a front and rear piping shown in FIG. 6 and a cross piping shown in FIG.

For this reason, a tandem master cylinder 51 is used for the two-system piping, and the tandem master cylinder 5
1 is provided integrally with a reservoir tank 52 in which the brake fluid is filled, and a constant level of the brake fluid is filled therein. Also, inside the tandem master cylinder 51,
A primary chamber and a secondary chamber (not shown) are provided so as to correspond to the two-system piping, and the hydraulic pressure generated in these chambers corresponds to the primary system 53 and the secondary system 54 via brake pipes 55 and 56. It acts on the brakes of the left and right rear wheels 57, 58 and the brakes of the front wheels 59, 60. Note that the primary system 53 is provided on the side near the vacuum servo 61.

As described above, the reason for using two brake pipes is that even if a crack or the like occurs in one of the brake pipes 55 or 56 and the brake fluid flows out, the vehicle is stopped by one of the two brake pipes. This is because it can be done.

The reservoir tank 52 has a reservoir main body 62 as shown in FIGS. 8 and 9, and has a lower portion having three large chambers 6 inside the reservoir main body 62.
A vertical wall 66 divided into 3, 64, and 65 is provided.
The arc-shaped portion of the vertical wall 66 is formed in order to make one of the large rooms described above a storage room for a float (not shown). In the large chamber 65 of the reservoir body 62,
A partition wall 67 for determining the normal maximum capacity of each system 53, 54 is provided, and is further divided into two small chambers 65a, 65b by the partition wall 67. Therefore, the higher the partition wall 67 is, the smaller the maximum capacity of each system 53, 54 is, so the height of the partition wall 67 is determined to a predetermined size.

The reservoir body 62 is provided with two brake fluid supply ports 68 and 69, and the rear supply port 68 is provided in the large chamber 63 and communicates with a primary system (rear system) 53. I have. On the other hand, the front side supply port 69 is provided outside the reservoir main body 62 and communicates with the large room 64 and also communicates with the secondary system (front system) 54. Further, the large room 63 and the small room 65a communicate with each other via a passage 70, and the large room 64 and the small room 65b communicate with each other via a passage 71. The reservoir tank 54 normally has a MAX level H shown in FIG.
Until the brake fluid is filled.

[0007]

However, in the conventional brake device described above, if it is assumed that, for example, a crack occurs in the brake pipe 56 of the secondary system 54 and the brake fluid flows out, the large chamber 64 on the secondary side is provided. And the inside of the small chamber 65b is empty because the brake fluid is gone,
The inside of the large room 63 and the small room 65a on the primary side is shown in FIG.
The brake fluid 72 is reduced to the height of the partition wall 67 as shown in FIG.

When the brake is applied in this state, the small room 6
As shown in FIG. 11, the brake fluid 72 remaining in 5a passes over the partition wall 67 due to a nose dive (a phenomenon in which the tip of the vehicle is lowered) and inertia force, and as shown by an arrow, a small chamber 65b.
Go to Further, since the large chamber 63 and the small chamber 65a communicate with each other through the passage 70, the amount of the brake fluid 72 in the large chamber 63 also decreases. Therefore, when the brakes are applied several times in the same state, as shown in FIG.
Since the amount of the brake fluid 72 is considerably reduced, the air may enter the tandem master cylinder 51 from the rear supply port 68 and the brake of the primary system 53 may be disabled, so that the brake may not be effective.

The present invention has been made in view of such circumstances, and has as its object the purpose of introducing air from the brake fluid supply port when one of the two front and rear brake systems fails. It is an object of the present invention to provide a reservoir tank capable of preventing the above.

[0010]

In order to solve the above-mentioned problems of the prior art, the present invention provides a tandem mass
Reservoir body that stores brake fluid to be supplied to the cylinder
A vertical wall is provided below the inside of the inside of the inside of the reservoir body.
The interior is divided into a plurality of large rooms, and the wall and
And one large room surrounded by vertical walls in the width direction of the vehicle.
Only set the partition plates, with respect to the vehicle by the partition plate, before
Forming two chambers, a side chamber and a rear chamber,
Through the brake fluid supply port and the master cylinder
Connected to the front and rear brake systems.
In the reservoir tank passed through, the two chambers
In the center of the vehicle in the width direction of the vehicle on the partition plate of the rear compartment
When the lower part located is curved toward the front chamber,
In both cases, the rear supply port is located in the rear small chamber.
Near the front of the vehicle,
It is located in the center of the large room .

[0011]

[Function] In the reservoir tank according to the present invention, the reservoir is mounted on the vertical wall.
Dividing the inside of the reservoir body into a plurality of large chambers,
One large room surrounded by the body wall and vertical wall
A partition plate formed in the direction is provided.
To form two small chambers, one on the front side and the other on the rear side.
These two chambers are connected to the brake fluid supply port and the master
Two shakes on the front and rear sides via the cylinder
The two small chambers are connected to the
Located in the center of the vehicle in the width direction of the partition in the side compartment
The lower part is curved toward the front chamber and formed
In addition, the rear side supply port is
Is also near the partition plate on the front side with respect to the vehicle,
For being arranged in the center of the large chamber, for example, failure in the system of front brake system occurs, front brake fluid in the reservoir body are all contained within the brake pipe chamber in front side of the vehicle Finally but empty, then even if the rear brake fluid becomes less rear brake fluid moved to the front side of the chamber with vibration-shaking of the vehicle body, the rear side supply port located in the vicinity of the partition plate Up to the rear supply port, air does not enter the tandem master cylinder.
The side brake system operates normally.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments.

FIGS. 1 to 5 show one embodiment of a reservoir tank according to the present invention. In the drawings, reference numeral 1 denotes a conventionally known tandem master cylinder. Inside the tandem master cylinder 1 are two pistons, not shown, a primary piston and a secondary piston.
A plurality of piston cups are arranged in series along the axial direction, and are configured to generate hydraulic pressure (eg, hydraulic pressure) in a primary chamber and a secondary chamber defined by the two pistons. ing. The hydraulic pressure generated in the primary chamber acts on the left and right rear wheels, and the hydraulic pressure generated in the secondary chamber acts on the left and right front wheels.

Above the tandem master cylinder 1 is a reservoir tank 2 for storing brake fluid (for example, brake oil) to be supplied to the master cylinder.
Are integrally mounted. This reservoir tank 2
Comprises a cylindrical reservoir body 3 with a bottom filled with brake fluid to a predetermined height, and a cap (not shown) for closing an upper opening of the reservoir body 3. It is configured such that a float (not shown) is housed and arranged inside.

Below the inside of the reservoir body 3, three vertical walls 4, extending radially from the inner peripheral surface toward the center.
5, 6 are erected on the bottom, and these vertical walls 4, 5, 6
Thus, the inside of the lower half of the reservoir body 3 is divided into three large chambers 7, 8, and 9. The rear side of the vehicle
The side large chamber 7 the front side large chamber 8 after positioned on the front side are partitioned by a central vertical wall 4, not communicate with each other than above the said vertical wall 4, led to the separate brake system ing.

[0016] That is, the brake fluid in the rear large chamber 7 is supplied to the brake system of the primary line (rear line), the brake fluid of the front-side large chamber 8 is supplied to the brake system of the secondary line (Front line) It has become so. For this reason, a rear brake supply port 10 is formed in the inner bottom surface of the reservoir body 3 so that the reservoir body 3
The bottom surface of the outer peripheral part 3a located in the vehicle front side, the front side brake fluid supply port 11 communicating with front-side large chamber 8
These supply ports 10 and 11 communicate with corresponding liquid chambers (not shown) in the tandem master cylinder 1 respectively.

Meanwhile, the large chamber 9 between the front side large chamber 8 and the rear large chamber 7 is a chamber for accommodating a float, not shown, the inner circumferential surface and an arcuate vertical wall of the reservoir body 3 5,6
A partition plate 12 formed in the width direction of the vehicle is provided upright at a substantially central position in the vehicle front-rear direction. The partition plate 12 is provided on the extension line of the central vertical wall 4 between the reservoir main body 3 and the central vertical wall 4, whereby the large room 9 is moved in the front-rear direction of the vehicle. It is equally divided form into two chambers with the rear chamber 9a and the front side chamber 9b further. Rear and chamber 9a and the front side chamber 9b is not communicated except in the upper partition plate 12, the rear chamber 9a is a rear <br/> side large chamber through the passage 13 of the vertical wall 5 extending in the vertical direction 7 and communicates, front side chamber 9b communicates with the front-side large chamber 8 through the passage 14 of the vertical wall 6, which also extends vertically.

The partition plate 12 is provided for determining the normal maximum capacity of each of the rear brake system (primary system) and the front brake system (secondary system), so that the maximum capacity of each system does not decrease. The height of the partition plate 12 is lower than the vertical walls 4, 5, and 6. The lower located in the center of the Kurumahaba <br/> direction of the vehicle in the partition plate 12 is formed to be curved toward the front side chamber 9b, the rear side supply port 10 is rear small chamber 9a most vehicle to the front side near the partition plate 12
And is arranged substantially at the center of the large room 9. The position of the rear side supply port 10 is
When the reservoir tank 2 is tilted forward due to a nose dive or the like when the brake is applied, it substantially coincides with the lowest point of the rear small chamber 9a.

If the rear supply port 10 is disposed too far in front of the primary piston (not shown) of the tandem master cylinder 1, the brake fluid can flow back into the reservoir tank 2 by the movement of the piston. Therefore, it is necessary to provide it at a position immediately before the piston in a state before operation. Also, in FIG.
It shows the front side of the brake system , and arrow b indicates the vacuum servo side.

In the reservoir tank 2 of this embodiment,
For example, failure in the system of front brake system occurs, first brake fluid 15 filled reservoir body 3 to MAX level flows all through the front supply port 11 to the outside, the front side of the vehicle The large room 8 and the small room 9b become empty, and the brake fluid 15 reduced to the height of the partition plate 12 is stored in the large room 7 and the small room 9a on the rear side of the vehicle (see FIG. 3).

When the brake is actuated in this state, the front of the reservoir tank 2 tilts downward, and the brake fluid 15 remaining in the rear small chamber 9a causes the nose dive, inertia force, or before side chamber 9b as shown in arrow over the partition plate 12 such as by vibration, shaking
Go to, flows out through the passage 14, front-side large chamber 8 and the front-side supply port 11. In addition, since the rear large chamber 7 also communicates with the rear small chamber 9a via the passage 13, the amount of the brake fluid 15 in the large chamber 7 also decreases. Therefore, when the brake is actuated several times in such a state, the above operation repeatedly occurs, and the amount of the brake fluid 15 in the large chamber 7 and the small chamber 9a on the rear side with respect to the vehicle also decreases as shown in FIG.
As shown in the figure. However, since the position of the rear side supply port 10 is substantially at the center of the large chamber 9 and near the partition plate 12, the supply port 10 is present in the brake fluid 15 to the end as shown in FIG. Air does not enter the tandem master cylinder 1 from the rear supply port 10, and the rear brake system operates normally.

In the present embodiment, the vehicle
Since forming by bending towards the front side chamber 9b of the lower located in the center of the Kurumahaba direction, a rear supply port 10
In the rear small room 9a, it can be arranged in the vicinity of the partition plate 12, which is closest to the front side of the vehicle , and substantially in the center of the large room 9.

In the above, one embodiment of the present invention has been described.
The present invention is not limited to the embodiments described above, and various modifications and changes can be made based on the technical idea of the present invention.

[0024]

As described above, the reservoir tank according to the present invention uses the brake fluid supplied to the tandem master cylinder.
A vertical wall is provided below the storage reservoir body, and the vertical wall
Dividing the interior of the reservoir body into a plurality of large chambers,
A car in one large room surrounded by the wall and vertical wall of the server body
A partition plate formed in both width directions is provided.
Two small chambers are formed on the front and rear sides of the vehicle
And connect these two chambers to the brake fluid supply port and the front
Front and rear sides via the master cylinder
To the two brake systems,
Of which, the center in the width direction of the vehicle at the partition in the rear compartment
The lower part located at is curved toward the front chamber
At the same time, connect the rear supply port to the rear
In the vicinity of the partition plate closest to the front of the vehicle,
Because it is located at the center of the one large room , for example, Freon
Failure of the brake system on the
The front side brake fluid inside the main body is supplied to the front side supply port
All flow out to the outside, and the front chamber is emptied,
The rear rear brake fluid is in front of the chamber due to
Even if the rear brake fluid is low
The rear supply port located near the cutting plate
Air is flowing from the rear supply port.
It does not happen that intrudes into the dem master cylinder
The rear brake system operates normally. By this
Therefore , even when one of the two front and rear brake systems fails , the other brake system can operate normally.

[Brief description of the drawings]

FIG. 1 is a horizontal sectional view showing a reservoir tank according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a conceptual diagram showing a state of brake fluid in a reservoir body of the reservoir tank when the front brake system fails.

FIG. 4 is a conceptual diagram showing a state of brake fluid in a reservoir body when a brake is applied when the front brake system has failed.

FIG. 5 is a conceptual diagram showing the state of the brake fluid in the reservoir body when the brake is applied several times when the front side brake system fails.

FIG. 6 is a conceptual diagram showing front and rear pipes of a two-system pipe of a brake.

FIG. 7 is a conceptual diagram showing a cross pipe of the two-system pipe of the brake.

FIG. 8 is a horizontal sectional view showing a conventional reservoir tank.

FIG. 9 is a sectional view taken along line BB in FIG. 8;

FIG. 10 is a conceptual diagram showing a state of brake fluid in a reservoir body of the reservoir tank when the front side brake system has failed.

FIG. 11 is a conceptual diagram showing a state of brake fluid in a reservoir body when a brake is applied when the front brake system has failed.

FIG. 12 is a conceptual diagram showing the state of the brake fluid in the reservoir body when the brake is applied several times when the front side brake system fails.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tandem master cylinder 2 Reservoir tank 3 Reservoir main body 4,5,6 Vertical wall 7,8,9 Large room 9a, 9b Small room 10 Rear brake fluid supply port 11 Front brake fluid supply port 12 Partition plate 13,14 Passage 15 Brake fluid

Claims (1)

(57) [Scope of request for utility model registration] 1. A shaker to be supplied to a tandem master cylinder.
A vertical wall is provided below the reservoir body for storing the
The interior of the reservoir body is divided into multiple large rooms by vertical walls
And a wall surrounded by a wall and a vertical wall of the reservoir body.
A partition plate formed in the width direction of the vehicle is provided in the large room of
Two small parts, front and rear, with respect to the vehicle
Chambers and connect these two chambers to the brake fluid supply port
And front and rear via the master cylinder.
Reservoir tank connected to the two brake systems on the rear side
In the above two small chambers, the partition plate of the rear small chamber
The lower part located at the center in the vehicle width direction of the vehicle
To the rear side supply
The port is located closest to the front of the vehicle in the rear compartment.
In the vicinity of the partition plate and in the center of the one large room
Reservoir tank, characterized in that the.