JPH0239962Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an inlet cap for a liquid tank such as a fuel tank or a lubricating oil tank in a portable engine such as a chain saw or a brush cutter.

Conventionally, in this type of liquid tank, in which the filler cap was removably engaged with the inner diameter of the filler port for injecting the content liquid, spillage occurred near the outer periphery of the filler port on the outer surface of the filler port. This may cause problems such as dirt, dust, etc. adhering to the liquid, contaminating the clothes of workers during work, or entering the tank and contaminating the liquid content during the next injection. In addition, since the airtight packing part pressed between the inlet part and the inlet cap was engaged with the relief groove at the end of the threaded part of the inlet cap, the inner diameter of the airtight packing part and If you match the bottom diameter of the relief groove, it will be made of a flexible material with great elasticity when the inner diameter of the airtight packing part is pushed open and passed through the outer diameter of the threaded part to fit into the relief groove. It was too soft and unsuitable for the airtight packing. Therefore, an airtight packing part is made of a material with appropriate hardness and has an inner diameter larger than the relief groove diameter, and after engagement, it can move freely in the radial direction by the gap, thereby preventing wear on the airtight surface. This was causing leakage due to imbalance.

The present invention includes an airtight packing part that engages with a relief groove at the end of the threaded part of the inlet cap and is pressed and clamped between the inlet part and the inlet cap; By locking the annular body made of an elastic material into one body with a dust-proof seal part that covers the outer periphery of the inlet and engages with the outer periphery of the inlet cap, the injection outer periphery of the inlet part is fixed. This prevents dust from adhering to the surrounding area and contaminating the worker's clothes.It also prevents dust from entering the tank during the next injection. By forming the inlet cap into one piece, the structure can be made simple and inexpensive.
The purpose is to accurately and reliably position and engage the dustproof seal part to prevent wear and tear on the packing surface.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the drawings, reference numeral 1 shows a chain saw equipped with an inlet cap according to an embodiment of the present invention, and FIG. 1 shows a planar cross-section of the front end. That is, 3 is a box-shaped main body case, and an engine 5 is built inside. 7 is a fan fixed to one end of the crankshaft 9;
Reference numeral 11 denotes a recoil starter that engages with the fan 7 in only one direction by a locking pawl 13, and is rotatably supported by a shaft portion 17 on a lid portion 15 that is removably locked on the main body case 3. 19 is the crank, 21
is a crank pin, and 23 is a connecting rod. 25 is a centrifugal clutch provided at the other end of the crankshaft 9; 27 is a sprocket provided on the centrifugal clutch 25; 29 is a chain holder; 31 is a saw chain that is slidably engaged with the outer periphery of the chain holder 29; It is engaged and rotated to cut trees, etc. 33 is the side plate, nuts 35,3
5, the chain holder 29 is clamped and fixed between the main body case 3 and the main body case 3. 37 is a lubricating oil liquid tank partitioned by a partition wall 39 in the main body case 3, 40 is an oil pump driven by the engine 5, and 41 is a suction pipe with a filter 43 at the end.
is provided. 45 is a suction passage that communicates the suction pipe 41 and the oil pump 4; 47 is the oil pump 40;
This is an oil supply path for supplying oil to the saw chain 31 from there.

Reference numeral 49 is an injection port for injecting the content liquid, that is, lubricating oil, into the liquid tank 37, and 51 is an injection port cap that is detachably engaged with the inner diameter portion 53 of the injection port 49 through a threaded portion 55. 57 is the injection port 49
The main body case 3
It is located at the top of the side of the Reference numeral 59 denotes an annular body that locks onto the outer periphery of the inlet cap 51, and includes an escape groove 60 at the end of the threaded portion 55 of the inlet cap 51.
the inlet portion 57 and the inlet cap 51
An airtight packing part 6 that is pressed and clamped between
1 and a dustproof seal section 63 that covers the outer surface of the injection port 57 near the outer periphery of the injection port 49 are formed into one body from an elastic material such as rubber. 65 is a chain whose one end is locked to the inlet cap 51 by a screw 67, and the other end is locked to a locking piece 69 to prevent it from falling off or being lost when the inlet cap 51 is removed. be.

In the above embodiment, the lubricating oil in the liquid tank 37 is pumped through the suction pipe 41 and the suction passage 45 by the oil pump 40 that is driven as the engine 5 rotates.
The oil enters the oil pump 40 through the oil supply path 47 and is supplied to the oil supply section of the saw chain 31.

When introducing lubricating oil into the liquid tank 37, the lubricating oil is injected from the inlet 49 without removing the inlet cap 51 from the inlet 49. After injection, when the inlet cap 51 is engaged with the inlet 49 by the threaded part 55, the packing part 6 is pressed and held between the inlet cap 51 and the inlet part 57.
1 prevents leakage, and the dustproof seal part 6
3 covers the outer surface of the inlet portion 57 near the outer periphery of the inlet 49, so even if oil adheres to this area, dust will not adhere thereon.

Since the present invention has the structure as described in the claims, it covers the outer surface of the inlet part near the outer periphery of the inlet to prevent dust from adhering to it, prevents the worker's clothes from being contaminated during work, and also prevents the inside of the tank during injection. In addition, the structure can be easily manufactured at low cost, and both the airtight packing part and the dustproof seal part can be accurately and reliably engaged with the inlet cap in the radial and axial directions. It is possible to prevent the seal from coming off, and also to prevent the packing surface from being worn out.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well. Further, the symbols shown in the claims do not limit the technical scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 is an explanatory plan cross-sectional view of one embodiment of the present invention. Explanation of symbols representing main parts of the drawings, 37...
...Liquid tank, 49...Inlet, 51...Inlet cap, 53...Inner diameter part, 55...Threaded part, 5
7... Inlet part, 59... Annular body, 60... Relief groove, 61... Packing part, 63... Dust-proof seal part.

Claims (1)

[Scope of utility model registration request] In an inlet cap of a liquid tank that is removably screwed onto the inner diameter part 53 of an inlet 49 for injecting the internal solution into the tank 37, a clearance groove 60 at the end of the threaded part 55 of the inlet cap 51 is provided. An airtight packing part 61 that is engaged and pressed and held between the inlet part 57 provided with the inlet 49 and the inlet cap 51, and the inlet on the outer surface of the inlet part 57. 49 and engages with the outer periphery of the inlet cap 51.
An inlet cap for a liquid tank, characterized in that an annular body 59 is provided by integrally forming the inlet cap 51 and the inlet cap 51 from an elastic material.