JP2554433Y2 - Reservoir - Google Patents

Description

[Detailed description of the invention]

[0001]

INVENTION The present invention relates to relates to a reservoir, and more particularly, a vehicle brake, of preferred reservoir for hydraulic fluid such as a clutch.

[0002]

2. Description of the Related Art A reservoir used for a vehicle brake or the like has a liquid supply port below the liquid level and a liquid injection port above the liquid level. The reservoir is required to maintain the internal pressure close to the atmospheric pressure in order to supply the hydraulic fluid through the supply port, and therefore, the liquid injection port may cause a liquid leakage that may occur due to a liquid level jumping up due to vibration of a vehicle or the like. While preventing
It is necessary to miss changes in the internal pressure of the reservoir caused by fluctuations in the liquid level. For this purpose, the reservoir cap and seal have been devised.

[0003] A conventional reservoir of the first type is shown in FIG.
A diaphragm type sealed reservoir of the type described in Japanese Patent Publication No. 01-2001 will be described. In this figure, this reservoir is
Reservoir main body 2 integrally provided with liquid inlet 22 thereon
1 and two liquid supply ports 25 are provided in the lower part of the reservoir body 21. A reservoir cap 23 is attached to the liquid inlet 22 via a screw fitting. Further, a seal covering the open end of the liquid inlet 22 and being sandwiched between the reservoir cap 23 and the open end face of the liquid inlet 22. A diaphragm 24 forming a part is provided. The diaphragm 24 is operated by the pressure difference between the upper and lower spaces, and keeps the internal pressure of the reservoir constant and prevents the liquid leakage due to the liquid jumping up by the closed structure.

FIG. 2B shows the details of the portion A in FIG. 2A. As shown in the figure, the diaphragm 24 has annular projections 26 on the upper surface and the lower surface of the outer peripheral portion 25 sandwiched between the reservoir cap 23 and the opening end of the liquid inlet 22 respectively. The annular projection 26 improves the positioning of the diaphragm 24 and the sealing performance. Outer peripheral part 2
An annular rib 27 is provided on the inner lower side immediately adjacent to 5, and the rib 27 functions as a guide for inserting the seal portion into the liquid inlet when the reservoir cap is attached. Has the function of dropping the liquid adhering to the reservoir liquid surface side.

[0005] A second type of conventional reservoir is shown in FIG.
The following describes a reservoir of the type described in Japanese Patent Publication No.
The reservoir shown in the figure has a cylindrical liquid inlet 29 protruding from the reservoir body 28, and a seal part 31 sandwiched between the reservoir cap 30 and the liquid inlet 29 has a slit 32 in the center. The seal portion 31 also has an annular protrusion 33 on the opening end side on the liquid inlet side of the seal surface. With the structure of the seal portion 31, liquid leakage caused by the splash of the liquid is prevented on the film surface of the seal portion 31, and the internal pressure due to the rise of the liquid surface can be released by the slit 32.

[0006]

[Problem to be solved by the present invention]
In the reservoir described in Japanese Patent Publication No. 01, in consideration of dimensional tolerances and changes over time between components, when trying to secure a sufficient throttle allowance when attaching the reservoir cap to the liquid suction port, the material forming the diaphragm is Due to the rigidity, the surface pressure of the sealing surface increases, and a large force is required to rotate the reservoir cap. Further, at this time, the outer periphery of the diaphragm is twisted due to uneven friction, and smooth movement of the diaphragm film is lost or the sealing performance of the outer periphery is deteriorated, so that the function of the diaphragm may be deteriorated.

Further, the annular rib immediately below the outer peripheral portion causes friction with the reservoir body, further increasing the large force necessary for mounting the reservoir cap, and at the same time, turning over or biting may occur. There is also.

In the reservoir described in Japanese Utility Model Laid-Open Publication No. Sho 60-1661, the annular projection of the seal portion does not have a place to escape when compressed vertically when the reservoir cap is tightened, so that a large tightening force is required. In addition to the above, the seal portion is likely to be twisted. In the case of this seal portion, when the twist is generated, the slit portion is always opened, and there is a possibility that the splashed liquid may pass through to the reservoir cap side to cause liquid leakage.

[0009] In view of the problems of the conventional reservoir, the present invention <br/> is easy to mount because not required much force to the attachment of the reservoir cap, and the seal portion turned up and biting, twisting or the like occurs It is an object of the present invention to provide a highly reliable reservoir which can reduce the risk and is easy to operate and hardly cause liquid leakage.

[0010]

In order to achieve the above-mentioned object, a reservoir according to the present invention comprises a reservoir body having a cylindrical liquid inlet, and an inner periphery rotatably fitted to an outer peripheral portion of the liquid inlet. and removable reservoir cap with a part, in the reservoir and a seal member sandwiched between said liquid inlet open end and the reservoir cap, the inner peripheral surface of the injection hole is toward the open end Large inner diameter in the direction
So as to have a tapered portion having a constant slope, an annular protrusion portion in which the sealing member is rush into the liquid injection mouth beyond the opening end on the opening end side, the outer peripheral surface of the annular projecting portion
Has a slope with a smaller diameter in the direction toward the tip.
The inclined surface is oriented in the axial direction of the liquid inlet.
It has a constant inclination smaller than the inclination of the par part, and
The state where the reservoir cap is attached to the reservoir body
Then, the outer peripheral surface of the annular projection provided in the seal member
And the inner peripheral surface of the liquid inlet is in contact with an end of the tapered portion opposite to the opening end.

A reservoir according to another aspect of the present invention is a reservoir of the same type , wherein a sealing member is provided in the reservoir.
Two mutually concentric annular projections abutting the cap,
The two annular projections are concentric with the two annular projections.
Extending to the opposite side with a diameter between the opening of the liquid inlet
And an annular projection that abuts on the end face of the part .

[0012]

[Function] In the direction in which the inner peripheral surface of the liquid inlet is directed toward the opening end.
Has a tapered portion having a constant slope as the inner diameter becomes large, an annular protrusion seal member is rush to <br/> injection mouth beyond the opening end on the opening end side, the Annular protrusion
The diameter of the outer surface is reduced in the direction toward the tip.
Surface, and the inclined surface is forward with respect to the axial direction of the liquid inlet.
The taper has a constant slope smaller than that of the
And the reservoir cap is attached to the reservoir body.
In the closed state, the outer peripheral surface of the annular protrusion provided in the seal member and the inner peripheral surface of the liquid inlet are in contact with each other at an end opposite to the opening end of the tapered portion, Since the contact area between the annular projection of the seal member and the inner peripheral surface of the liquid inlet is reduced and friction therebetween is reduced, a large force is not required when mounting the reservoir cap. Rolled up or bite into
The possibility of occurrence of torsion is reduced (claim 1).

[0013] A seal member contacts the reservoir cap.
Two concentric annular projections in contact with each other and the two annular projections
The projection has a diameter that is concentric and between the two annular projections.
And extend to the opposite side to abut against the end of the opening of the liquid inlet
With the configuration provided with the annular projections, both portions of the seal portion having the annular projections can be displaced in the surface directions each having no annular projection, so that when the reservoir cap rotates,
The frictional resistance generated between the seal portion and the opening end face of the reservoir cap and the liquid injection port is reduced while having a sufficient tightening allowance, and the possibility of turning, biting, and twisting of the seal portion is reduced. (Claim 2) .

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be further explained with reference to the drawings. FIG.
FIG. 3 is an axial sectional view of a reservoir cap and a liquid inlet of the reservoir according to the embodiment of the present invention. In FIG. 1, a liquid injection port 1 has a substantially cylindrical shape, and is provided so as to protrude above a reservoir body (not shown) with an inclination of an angle θ with respect to a horizontal direction. The liquid inlet 1 has a uniform cylindrical surface 1
In the portion of the inner peripheral surface following the cylindrical surface portion 10 having a zero, a tapered portion 2 having a constant inclination with an inner diameter increasing toward the opening end is provided.

The reservoir cap 3 has a locking claw 4 at its open end, and the locking claw 4 can be engaged with a projection 5 formed on the outer periphery of the liquid inlet 1. . Liquid inlet 1
A seal portion 6 is sandwiched between the open end of the reservoir cap 3 and the inner surface of the reservoir cap 3. The seal portion 6 is formed of a rubber member, and is in contact with the inner surface of the reservoir cap 3 via two annular projections 8 on the upper surface side, and is in contact with the open end face of the liquid inlet 3 on the lower surface side in one annular shape. It comes into contact via the projection 7. The annular projection 7 on the liquid injection port 1 side is disposed on the back surface of a substantially intermediate portion between the two annular projections 8 on the reservoir cap side, and the projection surface is formed wider than these.

An annular rib 9 is formed radially inward of the annular projection 7 of the seal portion 6, and the annular rib 9 has a substantially cylindrical shape, and its outer peripheral surface has a slight inclination such that its diameter decreases at the tip end surface. . This inclination is in the axial direction of the liquid inlet.
On the other hand, the inclination is smaller than the inclination of the tapered portion.
You. The outer peripheral surface of the annular rib 9 and the inner peripheral surface of the liquid inlet 1 are in contact with each other at a line portion at an end opposite to the opening end of the tapered portion of the liquid inlet. In the vicinity of the center of the seal portion 6, a slit 11 communicating the upper and lower spaces of the seal portion is provided.

In the reservoir constructed as described above, when the reservoir cap 6 is screwed into the liquid inlet 1,
First, the annular rib 9 of the seal portion 6 is inserted from the opening end of the liquid inlet 1. At this time, the tapered portion 2 of the liquid inlet 1 guides the annular rib 9. Next, the reservoir cap 3 is screwed in so that the locking claw 4 is locked by the projection 5 of the liquid inlet 1.

When the reservoir cap 3 is screwed in, the portions of the seal portion 6 having the annular projections 7 and 8 are bent in the direction of the surface having no annular projection, and the force required for the screwing is caused by the bending. And the sealing portion 6
The twisting force acting on the sealing portion 6 is reduced,
It reduces the risk of twisting.

After the reservoir cap 3 is attached to the liquid inlet 1, if the liquid jumps up due to the vibration of the vehicle or the like, the seal portion 6 receives the liquid by its inner surface and transfers it via the annular rib 9. Return to the reservoir body. In this case, in particular, the liquid adhering to the sealing part film surface flows downward along the film surface due to the configuration in which the liquid inlet 1 is provided inclined, and the annular rib 9 and the inclined cylindrical surface part 10 are formed.
Run down.

The outer periphery of the annular rib 9 is in contact with the inner peripheral surface of the liquid inlet 1 at the boundary between the tapered portion 2 and the cylindrical surface 10. Therefore, the working fluid does not enter the space between the tapered portion 2 and the outer periphery of the annular rib 9, and no fluid pool is generated between the annular rib 9 and the liquid inlet 1. For this reason, there is no danger that the liquid oozes out from the fluid pool, and that the fluid pool, which tends to occur when the reservoir cap 3 is removed, flows out.

The reservoir according to the present embodiment is a valve-opening-reservoir type in which the seal portion 6 has a ventilation slit 11 in the center portion. In this type of reservoir, particularly, the reliability of opening and closing of the slit portion is ensured. Therefore, it is necessary to prevent twisting at the time of mounting the reservoir cap. In this embodiment, since the sliding resistance between the seal portion 6 and the liquid inlet 1 and the reservoir cap 3 is reduced, the required open / close reliability is improved. Is secured.

[0022] In the above embodiment has been described reservoir of the valve type, reservoir of the present invention is not particularly limited to this type, it is possible to apply to the diaphragm-type reservoir.

[0023]

As described above, in the configuration of the present invention, the reservoir body having the cylindrical liquid inlet and
Detachable with inner periphery pivotally fitted to outer periphery of liquid inlet
Flexible reservoir cap, open end of the liquid inlet and front
The seal member sandwiched between the reservoir cap and
Wherein the inner peripheral surface of the liquid inlet is
Constant inclination so that the inside diameter increases in the direction toward the open end
The sealing member has a tapered portion having a slope.
An annular protrusion that projects into the liquid inlet beyond the open end on the mouth end side
A protruding portion, in which the outer peripheral surface of the annular projecting portion is directed toward the distal end portion.
An inclined surface having a diameter reduced in the direction, and the inclined surface
Less than the inclination of the tapered part with respect to the axial direction of the inlet
The reservoir cap has a constant slope
When the sealing member is attached to the reservoir body,
The outer peripheral surface of the annular protrusion and the liquid injection port are provided.
An inner peripheral surface is an end of the tapered portion opposite to the open end.
In the configuration described above, the splashed liquid can be returned to the reservoir from the annular projection, and the frictional resistance between the annular projection and the inner periphery of the liquid injection port is reduced. Since no force is required, and at that time, the possibility of twisting, biting and twisting of the seal portion is reduced, a highly reliable and easy-to-operate reservoir can be provided (claim 1).

[0024] Further, the seal member is provided with the reservoir cap.
Two annular projections concentric with each other,
And between the two annular projections concentrically
Extending to the opposite side with a diameter, the end face of the opening of the liquid inlet
And an annular projection that abuts the reservoir cap, when rotating the reservoir cap when attaching the reservoir cap to the liquid inlet, secures a sufficient margin for tightening and reduces frictional resistance during the rotation, and the seal portion Since the possibility of turning, biting and twisting of the reservoir is reduced, a highly reliable and easy-to-operate reservoir can be provided (claim 2) .

[Brief description of the drawings]

FIG. 1 is an axial sectional view of a liquid inlet of a reservoir according to an embodiment of the present invention.

2 (a) is a view similar to FIG. 1 of a first conventional reservoir, and FIG. 2 (b) is a detailed view of a portion A thereof.

FIG. 3 is a view similar to FIG. 1 of a second conventional reservoir.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid inlet 2 Taper part 3 Reservoir cap 6 Seal part 7, 8 Annular protrusion 9 Annular protrusion (annular rib) 11 Slit

Claims (2)

(57) [Scope of request for utility model registration] 1. A reservoir body having a cylindrical liquid inlet, a detachable reservoir cap having an inner peripheral portion rotatably fitted to an outer peripheral portion of the liquid inlet, and an open end of the liquid inlet. And a seal member sandwiched between the reservoir cap and the reservoir cap, wherein the inner peripheral surface of the liquid injection port has an inner diameter in a direction toward the opening end.
Has a tapered portion having a constant slope so increases, an annular protrusion portion in which the sealing member is rush into the liquid injection mouth beyond the opening end on the opening end side, the annular protrusion
The diameter of the outer surface is reduced in the direction toward the tip.
Surface, and the inclined surface is forward with respect to the axial direction of the liquid inlet.
The taper has a constant slope smaller than that of the
The reservoir cap is attached to the reservoir body.
In the state, the outer peripheral surface of the annular projection provided in the seal member and the inner peripheral surface of the liquid inlet are in contact with each other at an end of the tapered portion opposite to the opening end. Reservoir. 2. A reservoir body having a cylindrical liquid inlet, a detachable reservoir cap having an inner peripheral portion rotatably fitted to an outer peripheral portion of the liquid inlet, and an open end of the liquid inlet. And a seal member sandwiched between the reservoir cap and the reservoir cap, wherein the seal member is in contact with the reservoir cap.
Two annular projections concentric with each other,
And concentric and opposite with a diameter between the two annular projections
The ring extending to the side and abutting on the end face of the opening of the liquid inlet
A reservoir comprising: a projection .