JP2000265850A - Fuel tank for actuator with engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel tank for an actuator with an engine capable of enhancing the degree of freedom in the shape of the fuel tank, and of enlarging the fuel tank avoiding the interfering of the fuel tank with an interfering member. SOLUTION: An engine 1 and a generator to be drivingly rotated with the engine 1 driven, are provided, a spark plug cap 14 is projected obliquely upward out of the engine 1. In addition, a fuel tank 20 made out of a synthetic resin is mounted on the engine 1 and the generator so as to be supported thereby, and an avoiding port 31 for the spark plug cap 14 is formed so as to be recessed into a flat roughly circular arc shape in the other side part of the back surface of the fuel tank 20. The manufacture of the fuel tank 20 using synthetic resin such as polyethylene high in density and the like thereby enables the tank to be formed into a complex shape, and also enables the degree of freedom in the shape of the fuel tank 20 to be enhanced to a great extent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an actuator with an engine typified by a general-purpose generator with an engine, and more particularly to an improvement in a fuel tank.

[0002]

2. Description of the Related Art A conventional generator with an engine includes an engine, a generator which is driven to rotate by driving the engine, and a fuel tank 20 made of steel having a substantially rectangular flat shape and mounted on and supported on the engine and the generator. It has. As shown in FIG. 8, the fuel tank 20 is composed of a lower tank 21 having a dish-shaped cross section with an open front surface, and an upper tank 23 having a dish shape with a cross section opened with a rear surface. The flanges 22 are manufactured by overlapping and continuously seam welding.

As related prior art documents of this kind,
JP-A-6-108869 and JP-A-7-293217 may be mentioned.

[0004]

In the conventional generator with an engine, the fuel tank 20 is manufactured by seam welding using a pair of large-diameter electrode rollers as described above. There is a problem that the fuel tank 20 has to be straightened and flattened so that the shape of the fuel tank 20 has a very small degree of freedom. Further, since the fuel tank 20 is linear, it is very difficult to avoid collision or contact between the fuel tank 20 and an interference member such as a spark plug cap. Therefore, in order to avoid interference, the fuel tank 20
Has to be downsized.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has an engine with an increased degree of freedom in the shape of a fuel tank, an engine capable of avoiding interference between an interference member and the fuel tank, and increasing the size of the fuel tank. It is intended to provide a fuel tank for an actuator.

[0006]

According to the first aspect of the present invention, to achieve the above object, an engine and an actuator that operates by driving the engine are provided. An interference member protrudes upward from at least one of the actuators, and a fuel tank made of synthetic resin is mounted and supported on the engine and the actuator. A part of the outer peripheral surface of the fuel tank avoids the interference member. The feature is that the mouth is recessed.

[0007] The actuator may be a generator or a pump. In addition, it is preferable that a fuel filler port is formed so as to protrude from one side of a front part of the front surface of the fuel tank, and the avoidance port is formed in a substantially semicircular arc shape on the other side of the rear surface of the fuel tank.

Here, the types of engines in the claims include various types such as an air-cooled 4-cycle OHV engine, but any type may be used. Examples of the actuator include various generators and various pumps represented by a self-priming centrifugal pump. Further, the number of the interference members may be one or more. The interference member may be one that protrudes upward from the engine or one that protrudes upward from the actuator, and includes one that protrudes upward from each of the engine and the actuator.

The synthetic resin for the fuel tank is not particularly limited, but at least high-density polyethylene, a synthetic resin obtained by treating high-density polyethylene with fluorine or SO ₃ gas, a blend with a high-density polyethylene / polyamide copolymer, polyacetal , Polyamideimide, fluororesin, polyetheretherketone, polycarbonate,
Reinforced polyamide, hard vinyl chloride resin and the like can be mentioned. In addition, the avoidance opening may be any one or more. This avoidance opening can be appropriately formed into a substantially semi-elliptic arc shape in a plane, a substantially U-shaped plane, a substantially C-shaped plane, or a substantially U-shaped plane. Further, the substantially semi-circular arc shape in a plane includes both a semi-circular arc shape in a plane and a shape generally recognized as a semi-circular arc shape in a plane.

According to the first aspect of the present invention, since the fuel tank is made of a synthetic resin, the fuel tank is formed of a concave portion, a convex portion,
It can be formed into a complicated shape having an inclined portion or a bent portion. In addition, since an avoidance opening can be formed in the front, side, or back of the fuel tank, the interference member can be easily prevented from coming into contact with the fuel tank, thereby increasing the capacity of the fuel tank. Can be.

According to the second aspect of the present invention, if a generator is selected as the actuator, the generator can be widely used as an emergency power source, a power source for remote islands, or a power source for ships and the like. On the other hand, if a pump is used, this pump can be widely used for water supply to tanks, cleaning of factories, etc., water supply and drainage at civil engineering work sites, watering of agricultural lands, watering of greenhouses and houses, and drainage of manholes. It is.
Furthermore, according to the third aspect of the present invention, the fuel supply port is provided on one side of the front part of the front surface of the fuel tank, which is an external part, and the avoidance port is provided on the other side of the rear face of the fuel tank. It is possible to avoid concentration of the refueling port and the avoiding port on the side, and the balance is good in plan view. If the avoidance opening is formed in a substantially semicircular arc shape in a plane, when the interference member has a substantially cylindrical shape or a substantially cylindrical shape, the interference member fits in the avoidance opening in a well-balanced manner, and the appearance is excellent in a plan view.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention in which an actuator with an engine of the present invention is a horizontal axis type generator with an engine will be described below with reference to the drawings. However, the present invention is not limited to the following embodiment. Not something. As shown in FIGS. 1 to 7, the small and portable generator with an engine according to the present embodiment includes a general-purpose engine 1, a generator 15 that is driven to rotate by driving the engine 1, A cover 16 covering the periphery of the machine 15; a fuel tank 20 made of a synthetic resin mounted and supported on the engine 1 and the generator 15; and an avoidance opening 31 formed in the outer peripheral surface of the fuel tank 20 by recessing. ing.

The engine 1 comprises a crankcase 3, which is a main body having legs 2, a cylinder 4 mounted on the upper part of the crankcase 3, and a cylinder head 5 mounted on the cylinder 4. 2 is located on the right side. The crankcase 3 constituting the oil pan has an oil sensor mounted on a lower portion thereof through a mounting port, and a plurality of cooling fins arranged in front and rear, and protruding downward. A fan 6 is mounted on a side surface of the crankcase 3, and a handle 7 of a recoil starter for starting an engine is exposed from the fan 6.

As shown in FIGS. 2 and 6, a cleaner 8 for cleaning is mounted above the fan 6, and a strong bracket 9 is mounted inside the cleaner 8, and the size of the bracket 9 is large. The upper end is bent into an inverted L-shaped flat portion 10. A thick portion 11 is integrally formed on the horizontal flat portion 10 and a through hole is formed. A nut 12 functioning as a screw hole is welded to a peripheral portion of the through hole from below. I have. A spark plug 13 is detachably mounted on the cylinder head 5,
This spark plug 13 has a spark plug cap 1
The spark plug cap 14 projects obliquely upward and rearward as an interference member.

The generator 15 is of a rotating field type horizontal axis type having legs 2, and is arranged on the left side of FIG. 2 and has a rotating shaft connected to the crankshaft of the engine 1. As shown in FIG. 5, a rigid bracket 9 is mounted on the upper side of the generator 15, and a large upper end of the bracket 9 is bent into an inverted L-shaped flat portion 10. As shown in FIG. 7, a thick portion 11 is integrally formed on the horizontal flat portion 10, and a through hole is formed. A nut 12 serving as a screw hole is formed on the periphery of the through hole on the lower side. It is welded from.

The cover 16 includes the engine 1 and the generator 15
Cover 17 for protecting the vehicle from the front and the engine 1
And rear cover 1 for protecting part of generator 15 from the back
And 8. As shown in FIG.
As shown in FIG. 1, an operation panel 19 is mounted, and predetermined operation switches, lamps, and the like are arranged on the operation panel 19.

As shown in FIGS. 1 to 7, the fuel tank 20 is basically formed in a substantially rectangular shape in a plane using high-density polyethylene excellent in workability, rigidity, chemical resistance, cold resistance and the like. The four corners are rounded and chamfered. The fuel tank 20 has a box-shaped lower tank 21 having an open surface, an upper tank 23 which is vibration-welded to a flange 22 on the outer peripheral surface of the opening surface of the lower tank 21 via the outer peripheral flange 22, and And a handle 24 to be screwed, and supplies fuel to the cylinder 4 of the engine 1 via a fuel system.

As shown in FIG. 5 to FIG. 7, the lower tank 21 is formed so that the substantially central portions on both sides thereof are respectively depressed upward, and a bracket is provided in the substantially central portion, in other words, the space between the front and rear portions on both sides. Nine flat portions 10 are fitted respectively. Therefore, the side part of the lower tank 21 has a substantially concave shape when viewed from the bottom and from the side. In addition, lower through holes are formed at the center portions on both sides of the lower tank 21, respectively, and the lower through holes and the through holes of the flat portion 10 communicate with each other in close proximity to each other.

As shown in the figure, the upper tank 23 is formed such that the frontmost part and the rearmost part of the surface are respectively protruded and formed, and the front part of the surface is formed to be recessed in the left and right lateral direction. A cylindrical oil filler port 25 is protrudingly formed near one side of the front part of the surface, and a screw is formed by screwing on the outer peripheral surface of the fuel filler port 25. A cap 26 is formed through the screw.
Are detachably screwed. As shown in FIG. 7, a cylindrical recessed hole 27 having a bottom is formed in a central portion on both sides of the upper tank 23.
Each of the recesses 27 is formed with a recess, and an upper through-hole is formed in a lower portion of each of the recesses 27 so as to be in close proximity to and communicate with the lower through-hole.

As shown in FIG. 1, FIG. 2, or FIG. 7, the handle 24 is formed into a deformed substantially channel shape, and both ends thereof are mounted on the recessed holes 27 via washers 28 for stable seating. Is placed. A through hole is formed at each side end of the handle 24, and a bolt 29 penetrating through the washer 28 and the concave hole 27 is inserted from above into the through hole. 9 is screwed to the nut 12 via a lower through hole and an upper through hole. A cylindrical spacer 30 is provided on the shaft of the bolt 29.
Is inserted between the upper through hole and the washer 28, in other words, the flat portion 10 of the bracket 9.
And a side end of the handle 24.

Further, as shown in FIGS. 1 and 3, the avoidance port 31 is provided with a fuel tank 20, in other words, a lower tank 21.
The spark plug cap 14 which is curved and concavely formed in a substantially semicircular arc shape on the other side of the rear surface, which is the outer peripheral surface of the upper tank 23, and which protrudes in an inclined manner is partially loosely fitted and accommodated through a gap. The avoidance opening 31 enables the removal of the spark plug 13 and the spark plug cap 14 partially surrounding the working opening and its space.

In the above configuration, when the engine 1 is driven, the generator 15 rotates and functions as a power source. Also, a handle 2 attached to the upper part of the fuel tank 20
With the use of the mobile phone 4, the mobile phone can be hung and moved.

According to the above construction, since the fuel tank 20 is manufactured not by using steel but by using high-density polyethylene which is easily injection-molded, the fuel tank 20 can be formed into a complicated shape. 20 can significantly increase the degree of freedom. In addition, it is expected to greatly improve safety such as weight reduction, rust prevention and impact resistance. Further, since injection molding is performed using high-density polyethylene, the size of the fuel tank 20 can be increased.

This point will be described in detail.
Since 0 is linear, the contact between the spark plug cap 14 and the fuel tank 20 cannot be avoided unless the hatched area OL in FIG. 2 is removed. On the other hand, in the present embodiment, the escape port 3 is provided on the other side of the rear surface of the fuel tank 20.
1 can be formed by dent, so that the hatched area O in FIG.
Even if L is not removed, interference between the spark plug cap 14 and the fuel tank 20 can be avoided very easily, and as a result, the size of the fuel tank 20 can be increased.

In the above embodiment, the spark plug cap 14 is shown as the interference member, but the invention is not limited to this. For example, a coupling tool such as a bolt, or a plurality of interference members made of cables, wires, and the like may be used. Further, the avoidance opening 31 may be formed in a curved concave shape in a substantially semicircular arc shape on the other side of the rear surface which is the outer peripheral surface of the lower tank 21 or the upper tank 23. Further, the generator with an engine and the pump with an engine can be housed in a frame (not shown), and a plurality of casters and rollers can be arranged on the frame.

[0026]

As described above, according to the first aspect of the present invention, it is possible to improve the degree of freedom of the shape of the fuel tank and to reduce the weight thereof. Chemical resistance, heat resistance, solvent resistance, impact resistance, rust resistance,
There is an effect that multi-product small-quantity productivity and / or mechanical strength can be improved. In addition, the interference between the interference member and the fuel tank can be avoided to increase the size of the fuel tank.

[Brief description of the drawings]

FIG. 1 is an explanatory side view showing an embodiment of a fuel tank of an actuator with an engine according to the present invention.

FIG. 2 is a front view showing an embodiment of a fuel tank of the actuator with engine according to the present invention.

FIG. 3 is a plan view showing an embodiment of a fuel tank of the actuator with engine according to the present invention.

FIG. 4 is a rear view showing an embodiment of the fuel tank of the actuator with engine according to the present invention.

FIG. 5 is a side view showing an embodiment of the fuel tank of the actuator with engine according to the present invention.

FIG. 6 is another side view showing the embodiment of the fuel tank of the actuator with engine according to the present invention.

FIG. 7 is an explanatory sectional view showing an embodiment of the fuel tank of the actuator with engine according to the present invention.

FIG. 8 is a plan view showing a fuel tank of a conventional actuator with an engine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 3 Crankcase 4 Cylinder 5 Cylinder head 13 Spark plug 14 Spark plug cap (interference member) 15 Generator (actuator) 16 Cover 20 Fuel tank 21 Lower tank 22 Flange 23 Upper tank 24 Handle 25 Refueling port 31 Avoidance opening

Claims (3)

[Claims] An engine-equipped actuator comprising an engine and an actuator operated by driving the engine, wherein an interference member is projected upward from at least one of the engine and the actuator. A fuel tank for an actuator with an engine, wherein a fuel tank made of a synthetic resin is mounted and supported on an engine and an actuator, and an avoidance opening for the interference member is formed in a part of an outer peripheral surface of the fuel tank. 2. The fuel tank according to claim 1, wherein the actuator is a generator or a pump. 3. The fuel tank according to claim 1, wherein a fuel supply port is formed so as to protrude from one side of a front portion of the front surface of the fuel tank, and the avoidance port is formed in a substantially semicircular arc shape on the other side of the rear surface of the fuel tank. Item 3. A fuel tank for an actuator with an engine according to item 1 or 2.