JP3718928B2 - Oil tank for cargo handling operation of industrial vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil tank for cargo handling operation of an industrial vehicle (hereinafter simply referred to as an oil tank).
[0002]
[Prior art]
In an industrial vehicle, for example, a forklift, an oil tank for storing hydraulic oil to be supplied to a device that performs a cargo handling operation is required.
In this oil tank, a filter is usually attached to the tip of a supply pipe introduced into the tank from the lower part of the side wall, thereby preventing foreign matter from entering into the supplied hydraulic oil.
In addition, when the oil tank capacity is insufficient or the oil capacity is insufficient due to oil leakage, when the oil tank is inclined so that the supply port side becomes higher, as shown in FIG. Since 18 is exposed from the oil level L and sucks air, it becomes impossible to supply the essential hydraulic oil, so that the upper portion of the supply port 18 including the filter 3 is filtered as shown in FIG. As long as it is covered with the cover 4 and the oil level L does not drop below the filter cover 4, air is prevented from flowing into the supply port 18, and an attempt is made to effectively use a limited amount of hydraulic oil. .
As shown in FIG. 7, the filter cover 4 is integrated with the outer periphery of the front end of the supply pipe 2 introduced into the tank by passing through a blind cover 6 detachably provided by a bolt. The filter 3 has a structure in which the filter 3 is screwed into the tip opening of the supply pipe 2.
The filter 3 requires maintenance such as cleaning and replacement as appropriate in accordance with usage conditions.
For this purpose, first, the oil in the tank is drained, the filter cover 4, the filter 3, the supply pipe 2, and the blind cover 6 are integrally removed, and then the filter 3 is removed from the supply pipe 2.
[0003]
[Problems to be solved by the invention]
However, when removing the filter 3 from the supply pipe 2, the filter cover 4 is in the way and the tool cannot be operated freely, and the workability is poor.
Although a filter with a cover in which a filter cover is fixed to the filter can be used, the filter cover 4 becomes an obstacle in the case of cleaning.
Further, when screwed in, if the filter cover is in an inclined state, air enters from the side and a sufficient function is not exhibited.
[0004]
[Means for Solving the Problems]
The present invention is an oil tank for the purpose of improving the workability of maintenance, and its structure is such that a filter cover is provided at a supply pipe introduction port cut into a side wall from a lower surface of the opening and at an inner edge of the supply pipe introduction port. It has a bracket with a bracket bent portion continuously projecting outward, and at least part of the inner surface of the bracket is in close contact with the outer periphery of the supply pipe, with respect to the tip of the supply pipe It is to be attached detachably.
The bracket comprises a bracket bent portion and a horizontal plate portion connected to both lower end portions of the bracket bent portion, and the horizontal plate portion is fixed so as to protrude horizontally from both sides of the supply pipe. can also put the filter cover is attached to the distal end portion of the supply pipe by fixing by bolts to the seat, also the bracket, the bracket bent portion and the continuously provided by the horizontal plate portion at its bracket bent portion The filter cover can be attached to the front end portion of the supply pipe by bolting between the horizontal plate portion and a holding plate positioned below the supply pipe.
And it is desirable to interpose a sealing material on the contact surface between the bracket and the supply pipe.
[0005]
[Action]
By making the filter cover detachable from the supply pipe, the filter cover can be removed and the filter can be attached and detached without the filter cover.
In addition, the air inflow into the cover is shut out by bringing the inner surface of the bracket projecting outward continuously from the supply pipe introduction port formed in the side wall into close contact with the outer periphery of the supply pipe.
Further, a horizontal plate portion is connected to the bracket, and the horizontal plate portion is fixed to a mounting seat fixed to the supply pipe with a bolt, or the horizontal plate portion and a holding plate positioned below the supply pipe If the filter cover is attached to the tip of the supply pipe by bolting the gap, the filter cover can be easily detached.
And if a sealing material is interposed in the adhesion surface of a bracket and a supply pipe, a sealing performance will become high.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of an oil tank according to the present invention will be described with reference to the drawings.
1 and 2 show the oil pipe supply pipe mounting portion, where 1 is an oil tank, 2 is a supply pipe, 3 is a filter, and 4 is a filter cover.
An oil supply window 5 is cut out and formed on the side wall 1a of the oil tank 1 at a lower portion serving as a supply pipe mounting position. The oil supply window 5 is formed by bolts 6a, 6a,. It is occluded by the blind lid 6.
The supply pipe 2 is penetrated through the blind cover 6 with the tip end being located in the tank, and the outer periphery of the penetrating portion is fixed to the blind cover 6 so as not to leak oil by welding.
The filter 3 is detachable from the tip of the supply pipe 2 introduced into the tank by penetrating the blind lid 6, for example, is screwed in, and has a configuration described later so that the filter cover 4 covers the upper side of the filter 3. It is attached.
[0007]
The filter cover 4 has an opening on the lower surface, and a supply pipe introduction port 4a is cut into one side wall from the opening to a little deeper than the radius of the supply pipe 2, and the pipe introduction port 4a is long in the pipe introduction direction. The curved bent portion 7b of the curved plate whose outer surface matches the inner edge of the pipe inlet 4a is fixed so as to protrude outward continuously from the inner edge of the pipe inlet 4a. 7b, horizontal plate portions 7a, 7a are connected to both lower ends, and bolt insertion holes 8, 8 are formed in the horizontal plate portions 7a, 7a.
That is, the bracket 7 is comprised by the bracket curved part 7b and the horizontal board parts 7a and 7a.
[0008]
On the other hand, mounting seats 9 and 9 projecting horizontally from the lower surface to the left and right are fixed to the front end of the supply pipe 2, and bolt insertion holes 10 and 10 are formed in the mounting seats 9 and 9, respectively. The nuts 11 and 11 are fixed to the bolt insertion holes 10 and 10 in a coaxial arrangement.
Instead of providing the nuts 11, 11, a spiral may be cut on the inner surface of the bolt insertion holes 10, 10 to substitute for the nuts.
[0009]
In the oil tank thus formed, after the filter 3 is screwed and attached to the tip of the supply pipe 2, the filter cover 4 is approached from above so as to cover the filter 3, and the bracket bent portion 7b is supplied. The pipe 2 is attached to the inside of the tank, the horizontal plate portion 7a of the bracket 7 is brought into close contact with the mounting seat 9 so that the bolt insertion holes 8 and 10 overlap each other, and the bolt 12 is connected to the bolt insertion holes 8 and 10. It is assembled by being inserted continuously into, screwed into the nut 11 and fastened. In addition, a liquid gasket, a rubber packing 13 or the like as a sealing material is interposed between the bracket 7 and the supply pipe 2 as necessary (see FIG. 3).
However, it may be omitted if sufficient adhesion is obtained.
[0010]
When cleaning or replacing the filter, the filter cover 4 can be easily removed by releasing the fastening with the bolts 12, so that the movement of the tool is not disturbed by the filter cover during the removal operation of the filter 3.
Also, if the oil tank has a workable area, after removing the oil, the filter cover 4 can be removed directly from the tank without removing the blind cover 6, and then the filter 3 can be easily removed. Since it can be removed, workability is further improved.
In this case, the blind lid 6 can be omitted.
[0011]
In the above embodiment, since the mounting seat with a nut is fixed to the tip of the supply pipe, the bolt tightening operation is simple, but as illustrated in FIG. The body clamping plate 14 is applied from below the supply pipe 2 and fixed with the bolt 12 and the nut 11 with the horizontal plate portion 7a of the bracket 7, or the horizontal plate portion is omitted. As illustrated in b), the fastening band 15 can also be used.
However, the bracket 7 ′ in this case has a shape curved in a substantially semicircle.
In addition, the filter cover 4 can be replaced with other means that can be attached to and detached from the supply pipe 2.
Further, in the embodiment, the filter 3 side is configured with a male spiral and the supply pipe side is configured with a female spiral, but conversely, the filter 3 side may be configured with a female spiral and the supply pipe side may be configured with a male spiral, Of course, other removable fixing means other than the screw fastening are possible.
As illustrated in FIG. 5, the bracket 16 can be formed integrally with the filter cover 17 when the aperture is formed, and the lower surface of the opening of the cover is at least supplied by the bracket in a structure that is tightly coupled via the bracket. It is desirable to reach a horizontal position passing through the center of the supply pipe, which is the lowest position where the pipe can be closely attached.
[0012]
The oil tank of the present invention can be applied to other industrial vehicles other than forklifts, and the filter cover mounting structure is not limited to the structure shown in the above embodiment, but is detachable from the supply pipe. Any change can be made accordingly.
[0013]
【The invention's effect】
According to the present invention, by removing the filter cover, the attaching / detaching operation can be easily performed without restricting the movement of the tool.
Further, when the mounting structure using the bracket is adopted, the sealing process between the filter cover and the supply pipe can be performed only by tightly coupling the bracket to the supply pipe.
Furthermore, the filter cover can be easily removed by fixing the horizontal plate to the mounting seat with bolts, or by bolting between the horizontal plate and the clamping plate located below the supply pipe. it can.
If a sealing material is interposed between the bracket and the supply pipe, the sealing function is perfect.
[Brief description of the drawings]
FIG. 1 is an exploded view illustrating a supply pipe introduction portion in an embodiment of an oil tank according to the present invention.
FIG. 2 is an explanatory view showing an assembled state of a supply pipe introduction portion in an embodiment of an oil tank according to the present invention.
FIG. 3 is an explanatory view showing a coupling portion between a supply pipe and a filter cover.
FIGS. 4A and 4B are explanatory views showing a modification example of a coupling portion between a supply pipe and a filter cover. FIGS.
FIG. 5 is an explanatory diagram showing an example of changing a bracket.
FIG. 6 is an explanatory diagram for understanding the necessity of a filter cover.
FIG. 7 is an explanatory diagram of a conventional example.
[Explanation of symbols]
1. Oil tank 1a Side wall 2. Supply pipe 3. Filter 4. Filter cover 4a Supply pipe inlet 5. Oil supply window 5a Packing 6. ..Blind cover, 6a..Bolt, 7, 7 '.. Bracket, 7a..Horizontal plate portion, 7b..Bracket bent portion, 8..Bolt insertion hole, 9..Installation seat, 10..Bolt insertion hole , 11 ·· Nut, 12 · · Bolt, 13 · · Packing, 14 · · Nipping plate, 15 · · Fastening band, 16 · · Bracket, 17 · · Filter cover, 18 · · Supply port.

Claims (4)

A leading end of the supply pipe is introduced from the side wall into the lower part of the tank, and a filter is detachably attached to the leading end of the introduced supply pipe. The filter cover has a bracket provided with a bent portion of the supply pipe introduced into the supply pipe introduction port cut into the side wall from the lower surface of the opening and continuously projecting outward from the inner edge of the supply pipe introduction port. An oil tank for cargo handling operation of an industrial vehicle that is detachably attached to the tip of the supply pipe in a state where at least a part of the inner surface of the bracket is in close contact with the outer periphery of the supply pipe. The bracket comprises a bracket bent portion and a horizontal plate portion connected to both lower end portions of the bracket bent portion, and the horizontal plate portion is fixed so as to protrude horizontally from both sides of the supply pipe. The oil tank for cargo handling operation of an industrial vehicle according to claim 1, wherein the filter cover is attached to a tip end portion of a supply pipe by being fixed to a bolt with a bolt. The bracket includes a bracket bent portion and a horizontal plate portion connected to the bracket bent portion, and a bolt is tightened between the horizontal plate portion and a holding plate located below the supply pipe. The oil tank for cargo handling operation of an industrial vehicle according to claim 1 , wherein the filter cover is attached to a front end portion of the supply pipe. The oil tank for cargo handling operation of an industrial vehicle according to any one of claims 1 to 3 , wherein a sealing material is interposed on a close contact surface between the bracket and the supply pipe.

Images