JPH0644845Y2 - Cap member for vehicle oil tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cap member for an oil tank incorporated in a hydraulic system for steering, switching gears and the like in a vehicle.

(Prior Art) In recent vehicles, the steering system, gearbox switching, or height adjustment of the vehicle body is automatically performed by the hydraulic system during traveling. An oil tank incorporated in the hydraulic system. An example of this is shown in Fig. 4,
The body a has an elongated bottomed cylindrical shape due to the set space. An oil inlet pipe b ₁ for returning through a hydraulic circuit is attached to the bottom of the side wall or the bottom wall, and an inverted L-shape is formed in the center of the side wall. The outlet pipe b _{2 in the} shape of
A mesh device f for passing return oil is provided between the open ends of the inlet pipe b ₁ and the outlet pipe b ₂ , and a cover with a bracket d for suspending the supply oil strainer on the inner surface is provided at the upper end. C is attached, and a cap e is removably attached to the upper end opening of the cover C.

The cap e is composed of an inner lid body 1 of a legged cup body and an outer lid body 2 attached on the inner lid body 1, and the peripheral wall of the inner lid body 1 is
An inner peripheral wall 1b that stands up from the inside of the periphery of the bottom wall 1a and does not reach the lower surface of the outer lid body 2 and an outer peripheral wall 1c that extends outward from the middle of the inner peripheral wall 1b and reaches the lower surface of the outer lid body 2 An end wall that is formed in a double shape and that extends outward from the upper end of the outer peripheral wall 1c abuts the lower surface of the outer lid body 2 and is bent downward at a part of its outer peripheral edge, that is, at a symmetrical position on one diameter line. A piece 3 is provided, and the hook piece 3 is detachably attached to the upper end edge of the tank cover C in a bayonet manner. Further, the bottom wall 1a is provided with a plurality of ventilation small holes 4 and the lower side thereof. Is provided with a baffle plate 5 at a slight interval to prevent the oil in the body a from flowing out, and ventilation grooves 6a, 6b are provided in a part of the upper end wall and a part of the inner surface of the outer lid body 2 against it. (Actually, the hook piece 3 is provided at a position of 90 degrees, but in FIG. ), Corresponding to the upper and lower oil level in the tank body a, the small holes 4 of the bottom wall 1a of Uchifutatai 1
Also, air flows in and out through the upper end wall and the ventilation grooves 6a, 6b of the outer lid body 2, so that oil can be taken in and out without trouble.

(Problems to be solved by the invention) Generally, the air in the oil tank contains a considerable amount of mist-like oil, and the air is contained in the cap bottom wall 1a.
When it goes out through the small hole 4 and the ventilation grooves 6a, 6b, the oil mist contained in the air adheres to the inner and outer peripheral walls 1b, 1c of the cap e, which is liquefied and liquefies the bottom wall 1a.
It will be collected in the annular space 7b between the upper central space 7a and the inner and outer peripheral walls 1b, 1c.

By the way, in the above-mentioned conventional cap e, the central space 7a and the annular space 7b are directly covered with the outer lid body 2 and directly connected to the inner lid body 1.
Since it communicates with the upper end surface of and the ventilation grooves 6a and 6b of the outer lid,
When the cap e is removed from the cover C and placed upside down as shown in FIG. 5 when replenishing the tank with oil, the oil accumulated in the central chamber 7a and the annular chamber 7b is covered by the outer lid. When the cap e is turned over again and attached to the cover opening, the oil that has flowed down to the outer lid and the ventilation groove leaks to the outside through the ventilation groove and leaks to the outside. There was a problem that it seemed to occur.

Therefore, the present invention provides a cap member which can reliably prevent the oil accumulated in the cap from leaking out even if the cap member is repeatedly attached to and detached from the tank cover.

(Means and Actions for Solving Problems) Based on the above-mentioned object, the present invention comprises an inner lid and an outer lid attached to the upper outer side of the inner lid, and a peripheral wall of the inner lid is provided with a small hole. The inner peripheral wall that rises from the bottom wall and the outer peripheral wall that extends outward and extends upward from the middle of the bottom wall are doubled to form a central empty space on the bottom wall and an annular empty space between the inner and outer peripheral walls. An oil tank for vehicles, which is formed at the upper end of the outer peripheral wall and is provided with an end wall that extends outward and has a downward hook piece at a part of the peripheral edge, and is attached to the upper end opening of the tank cover by the hook piece. As the cap member, the inner lid body is disposed on the upper side of the inner lid body via the packing material provided on the end wall and with a gap formed between the inner lid body and the outer lid body. Is provided with a ventilation pipe that protrudes into the annular chamber or the central chamber of the inner lid, and It is characterized in that a ventilation groove communicating with the ventilation groove on the peripheral wall of the outer lid is provided in the portion.

Then, during use, air in the tank may pass through the small holes in the inner lid, the central empty chamber, the annular empty chamber and the ventilation pipes of the inner lid, the gaps, and the ventilation grooves in the surrounding area, depending on the increase and decrease of oil in and out of the tank. Or, when the outside air circulates, the oil contained in the air in the tank accumulates in the central chamber or the annular chamber in the process, and when the cap member is removed from the tank cover and turned over, The oil collected in the above will be transferred to the inner lid, but the oil in each chamber will not flow out to the outside even if it is reversed again due to the attachment of the cap.

(Embodiment) FIGS. 1 to 3 show an embodiment of the present invention, in which a cap member e is a cup-shaped inner lid body 11 with legs and an inverted dish-shaped outer lid fitted on the upper outer side thereof. A peripheral wall of the inner lid 11 is composed of a body 12 and a bottom wall 11 having a plurality of small holes 14 at the center thereof.
The inner peripheral wall 11b of a required height standing up from the inner side of the peripheral edge of a and the outer peripheral wall 11c extending outward from the middle of the peripheral wall and extending to substantially the same height are doubled. A central space 16a is formed and an annular space 16b is formed between the inner and outer peripheral walls 11b and 11c, and a part of the peripheral edge of the annular end wall 11d that extends outward from the upper end of the outer peripheral wall 11c, that is, one part. A hook piece 13 bent downward is provided at a symmetrical position on the diameter line, and is attached to the upper end edge of the tank cover C by the hook piece 13 in a bayonet-type detachable manner.
On the lower side of the tank body, a baffle plate 15 of the same diameter is used to prevent the oil in the tank body from jumping out from the small holes 14 due to vibrations.
Are provided integrally at a slight interval.

However, the configuration so far is essentially the same as that described above.

By the way, in the present invention, a disc-shaped inner lid body 17 is arranged on the inner lid body 11 via a packing material 18 provided on the annular end wall 11d, and the inner lid body 17 of the inner lid body 11 is arranged. The central space 16a and the annular space 16b are covered, and a plurality of ridges 17b are projected on the upper surface of the inner lid body 17 to form a gap between the inner space of the outer lid body 12 ( Moreover, the ridges may be provided on the inner surface of the outer lid body 12), and a part of the inner lid body 17 is provided with a ventilation pipe 17a of a required height that communicates with the above-mentioned gap, and the annular space 16b is provided downward. (Or central vacant chamber 16a), and further, the inner lid body 17 is provided with a ventilation groove 17c at a part of its peripheral edge (position at 90 degrees with respect to the hook piece 13 of the inner lid body),
It communicates with a ventilation groove 12a formed on the inner surface of the peripheral wall of the outer lid body 12. Reference numeral 19 is a packing material that is fitted between the bottom wall 11a and the downwardly widened portion of the outer peripheral wall 11c to seal the cover opening portion, and 20 is a return passage for the oil accumulated in the annular space.

When using it, when the oil level in the tank body drops, the outside air is exposed to the ventilation groove 12 of the outer lid 12 and the inner lid 17.
a, 17c into the gap on the inner lid 17, then from there through the ventilation pipe 17a to the annular chamber 16b and the central chamber 16a, through the small hole 14 in the inner lid bottom wall 11a When the oil level in the tank body rises,
When the internal air is accompanied by oil mist, first the small hole 14 in the bottom wall 11a
Then, it enters the central vacant chamber 16a and the annular vacant chamber 16b, passes through the ventilation pipe 17a, exits into the gap on the inner lid, and exits via the ventilation grooves 17c and 12a.

In the process, the oil mist contained in the internal air adheres to the inner and outer peripheral walls 11b, 11c, etc., and becomes droplets to form the central chamber 16a.
And it will be accumulated in the annular vacant chamber 16b.

Then, in order to supply oil to the tank, the outer lid body 12 and the inner lid body 11 are rotated, and the hook piece 13 thereof is aligned with the notch (not shown) provided in the upper edge of the cover, and the cap member e is attached. Remove it and turn it over as shown in Fig. 3
The oil accumulated in 16a and the annular space 16b flows down onto the inner lid body 17, but the inner lid body 17 is provided with a ventilation pipe 17a standing in the annular space chamber 16b (or the central space chamber 16a). And since the peripheral portion is sealed by the packing material 18,
The oil that has flowed down does not flow into the gaps between the outside of the inner lid 17, that is, the outer lid 12 and the ventilation grooves 17c and 12a.

Therefore, even if the cap member e is turned over again to close the cover opening after the oil supply is completed, the oil accumulated in the cap does not leak to the outside.

(Effects of the Invention) Since the present invention is configured as the cap member of the vehicle oil tank as described above, the cap member is detached with the operation of reversing the cap member with respect to the upper opening of the tank cover in order to replenish the oil tank with oil. Even after repeated installation, the oil that has accumulated in the central and annular chambers of the inner lid does not leak to the outside of the inner lid during use, and the oil leaks from the cap member to the outside. This can prevent the problem that the tank seems to be leaking oil.

[Brief description of drawings]

FIG. 1 is a sectional view of the embodiment of the present invention taken along the line XX of FIG. 2 is a bottom view of the cap member of FIG. FIG. 3 is a sectional view of the cap member turned upside down. FIG. 4 is a sectional view of an oil tank equipped with a conventional cap member. FIG. 5 is a sectional view showing a state in which the cap member is removed and turned upside down. In the figure, 11 …… inner lid, 11a …… bottom wall 11b …… inner wall, 11c …… outer wall 12 …… outer lid, 12a …… ventilation groove 13 …… hook piece, 14 …… small hole 15… … Baffle plate, 16a …… Central vacancy 16b …… Ring vacancy, 17 …… Inner lid 17a …… Ventilation pipe, 17c …… Ventilation groove e …… Cap member

Claims (1)

[Scope of utility model registration request] 1. An inner lid body 11 and an outer lid body which is attached to the outer side of the upper portion thereof.
12 and a bottom wall 11 having a small hole 14 on the peripheral wall of the inner lid 11.
The inner peripheral wall 11b rising from a and the outer peripheral wall 11c extending outward from the middle and extending upward are doubled to form a central empty space 16a on the bottom wall 11a and between the inner and outer peripheral walls 11b, 11c. An annular vacant chamber 16b is formed in the outer peripheral wall 11c, and the end wall 11d is provided at the upper end of the outer peripheral wall 11c with an outwardly extending hook piece 13 at a part of the periphery.
In the cap member of the vehicle oil tank, which is attached to the upper end opening of the tank cover by the hook piece 13, above the inner lid 11, the packing material 18 provided on the end wall 11d is interposed. In addition, the inner lid body 17 is arranged with a gap formed between the inner lid body 17 and the outer lid body 12.
A cap member for an oil tank for a vehicle, which is provided with a ventilation pipe 17a protruding into the annular cavity 16b or the central cavity 16a of 11 and a ventilation groove 17c communicating with the ventilation groove 12a of the outer cover 12 peripheral wall at a part of the peripheral edge. .