JPH0286924A - Portable power unit - Google Patents

Abstract

PURPOSE:To make vibration in a generating unit efficiently absorbable even in either of vertical and horizontal placements by installing two vibro-isolating members at both sides holding the center of gravity in between, on a straight line passing through the center of gravity of the generating unit, while installing another vibro-isolating member in direction of being crossed with these vibro-isolating members, in addition. CONSTITUTION:When a generating unit 7 is elastically supported in the inner part of an inner case 28 so as to be shown as being housed in an outer case 1 formed into a flat box form, a rubber vibro-isolating member 32 is interposed between a horizontal top face 31a of a receiving part 31 installed in this inner case 28 and the underside of a first stay 30. This vibro-isolating member 32 is positioned on a straight line X1-X1 passing through the center of gravity G of the generating unit 7 with a specified angle to an axis of a crankshaft 10, while it is set up at both sides holding the center of gravity G in between. Likewise another vibro-isolating member 37 is also interposed between a bottom surface 36a of another receiving part 36 and a second stay 35. This vibro-isolating member 37 is set up at both top and bottom sides holding the center of gravity G of the generating unit in between in a position of having the axis orthogonalized with the vibro-isolating member 32.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a portable power supply device that can be carried by humans, and particularly to a support structure around an engine that is a source of vibration.

[Prior Art] This type of portable power supply device is mainly transported to places where it is impossible to extract power from power transmission lines, and because it obtains power by driving a dynamo with an engine, it is used for various types of work. It is widely used not only for leisure purposes but also for leisure purposes.

Conventionally, this portable power supply device has an engine, dynamo, and various other functional parts necessary for operating the engine that are housed integrally in a box-shaped exterior case, with the complex mechanical structure hidden from the outside. It is known that the machine completely changed its image as a general-purpose machine. In this power supply device, the engine and generator, which are the main sources of vibration, are elastically supported in a vibration-proof manner via vibration-proof rubber to reduce vibrations and noise during operation.

However, since this conventional power supply device uses liquid fuel such as gasoline as fuel for the engine, there is a problem in that not only the driving position but also the transporting position is limited to one direction. For this reason, the applicant has recently replaced the conventional gasoline engine with a gas engine that uses pressurized gas such as liquefied propane gas or liquefied butane gas as fuel, and installed the exterior case vertically or horizontally. The company has developed a portable power supply device that can be operated in any position, and has already filed an application.

[Problem to be solved by the invention] By the way, in the case of this new power supply device as well, is it desirable to support the gas engine or dynamo elastically with anti-vibration via anti-vibration rubber, and when the device is placed vertically? If there was a difference in vibration damping performance between when the vehicle was placed horizontally and when it was placed horizontally, there was a risk that various practical problems would arise. There is a need for a vibration-proof structure that can

Therefore, an object of the present invention is to provide a portable power supply device that can efficiently absorb vibrations generated in a power generation unit without being restricted by the driving position, and can also reliably support this power generation unit. It is in.

[Means for Solving the Problems] Therefore, the present invention includes a power generation unit in which an engine and a dynamo driven by the engine are integrally connected by a bracket, and a support for supporting the power generation unit. Assuming a portable power supply device, a first support is located on a straight line passing through the center of gravity of the power generation unit, on both sides of the center of gravity, and is vibration-proofly supported by the support body via a vibration-proofing member. In addition to establishing a section, this first
The direction intersects with the parallel arrangement direction of the supporting parts, and the first part is located on both sides of the center of gravity, and
The present invention is characterized in that a second support part is provided which is elastically supported via a vibration isolating member from a direction intersecting with the support part.

"Operation" According to this configuration, multidirectional vibrations occurring in the power generation unit during engine operation are replaced by vibrations rolling around the center of gravity of the power generation unit. Therefore, while the engine is operating, the vibration isolating member of one of the supports receives the weight of the power generation unit as a compressive load and is elastically deformed depending on the operating position of the device, and the power generation unit is held against the support. It will provide anti-vibration support. On the other hand, the other vibration isolating member receives the rolling vibration of the power generation unit as a shear load and undergoes elastic deformation, and functions as a stopper that restricts the movement of the power generation unit beyond the permissible limit.

Therefore, the function of the vibration isolating member changes depending on the operating position of the device, so whether the support is placed vertically or horizontally, vibrations of the power generation unit can be efficiently absorbed. Also, the positioning of the power generation unit with respect to the support body can be performed reliably.

Embodiment] The present invention will be described below based on an embodiment shown in the drawings.

The exterior case indicated by reference numeral 1 in the figure is formed into a flat box shape,
It has an appearance similar to a handbag.

As shown in FIG. 2, this exterior case 1 includes a pair of synthetic resin case components la and Ib divided in the thickness direction.
These case components 1a, 1. It is assembled into a box shape by aligning the parts b against each other and tightening them with screws 2.

When the exterior case 1 is placed vertically, a handle 3 for transportation is integrally formed on one side that is the top surface of the exterior case 1, and at both ends along the width direction of the exterior case 1,
Side panels 4a and 4b made of heat-resistant synthetic resin are attached, respectively.

Further, reinforcing rib walls 5 are integrally provided on the inner surfaces of the case components 1a and lb. The rib walls 5 are abutted against each other on the base surfaces of the case components 1a and lb,
The interior space of the exterior case 1 is partitioned into a plurality of chambers 6.

Among these chambers 6, the power generation unit 7 is housed in the chamber 6 located on the side opposite to the handle 3, that is, on the bottom side when the exterior case l is placed vertically. The power generation unit 7 includes a liquid-cooled two-site engine 8 and a starter dynamo 9 driven by power transmitted from the engine 8. As shown in FIG. 6, the engine 8 is equipped with a hollow crankshaft 10 placed vertically along the height direction of the exterior case 1, and a crankcase 11 that accommodates the crankshaft 10 has an intake pipe. 12 are provided protrudingly.

The air taken in from this intake pipe 12 is transferred to the crankshaft 10.
The air enters a crank chamber (not shown) through an intake boat 13 provided in the air, and is led to the combustion chamber of the cylinder 15 through a scavenging passage when the piston 14 descends.

On the other hand, the starter dynamo 9 is a combination of a starter motor and a DC dynamo, and is arranged in parallel on the right side of the engine 8. The rotating shaft 16 of the starter dynamo 9 is parallel to the crankshaft 10 and vertically disposed in the vertical direction, and the rotating shaft 16 and the crankshaft 10 are interlocked with each other via a belt 17.

Therefore, when the engine 8 is started, the starter dynamo 9 acts as a starter motor to drive the engine 8, and after the engine 8 is started, the starter dynamo 9 is driven by the power transmitted from the crankshaft 10 to generate electricity.

The starter dynamo 9 and the crankcase 11 of the engine 8 are integrally connected via a box-shaped bracket 18, as shown in FIGS. 2 and 3. One end of the bracket 18 is welded to the starter dynamo 9, and the crankcase 11 of the engine 8 passes through the other end of the bracket 18. Two bolts 19 are installed between the upper and lower surfaces of the bracket 18 on both sides of the crankcase 11.
These bolts 19 are tightened by a pair of boss portions 21a protruding from both sides of the crankcase 11.
.

21b. In this case, among the bolt insertion holes 18a and 18b drilled in the lower surface of the bracket 18, one bolt insertion hole 18a has a long hole shape along the direction in which the belt 17 is stretched, as shown in FIGS. 3 and 5. An adjustment bolt 23 is screwed into the boss portion 21a located on the elongated bolt insertion hole 18a side via a lock nut 22. The tip of the adjustment bolt 23 is in contact with a stopper 24 welded to the bracket 18, and by loosening the lock nut 22 and adjusting the screwing amount of the adjustment bolt 23, the crankcase 11 of the engine 8 can be adjusted.
is pivoted about the other bolt 19 as a fulcrum in the direction toward and away from the starter dynamo 9, so that the tension of the belt 17 can be adjusted.

Further, in the case of this embodiment, a space 25 inside the bracket 18 sandwiched between the starter dynamo 9 and the crankcase 11 is communicated with the intake pipe 12 via an intake hose 26. Therefore, the intake pipe 12 is connected to the bracket 1.
The bracket 18 is opened on the inside of the bracket 8 and air is taken in from the space 25, and this bracket 18 also functions as an intake silencer. At the same time, if air is continuously sucked in from the space 25, which is surrounded by the engine 8 and the starter dynamo 9, which generate heat during operation, and has poor air passage, heat will locally accumulate inside the power generation unit 7. Without this, the power generation capacity can be maintained well.

The cylinder 5 of the engine 8 is located on the opposite side of the crankshaft 10 from the starter dynamo 9, and the muffler 27 connected to the cylinder 5 is connected to the starter dynamo 9.
is derived on the opposite side. The muffler 27 and the power generation unit 7 are assembled in advance into an inner case 28 separate from the outer case 1 to form a unit. It constitutes a supporting body.

The inner case 28 is made of a heat-resistant synthetic resin abrasive material such as glass nylon. As shown in FIG. 2, this inner case 28 has a front case 28a.
The front case 28a and the rear case 28b are divided into two parts, and the front case 28a and the rear case 28b are brought into contact with each other and assembled into a box shape by tightening with screws (not shown).

The power generation unit 7 is supported inside the inner case 28 in a vibration-proof manner. To explain this support structure, a first stay 30 constituting a first support portion is attached to a cover 29 that covers the starter dynamo 9 and the head of the cylinder 15. These first
The stays 30 extend horizontally on both sides along the width direction of the power generation unit 7 when the exterior case 1 is placed vertically as shown in FIG. The support faces the portion 31 from above. The receiving part 31 is the front case 28a and the rear case 2.
It is constructed by partially recessing the side of 8b inward,
A vibration isolating member 32 made of rubber is interposed between the horizontal upper surface 31a and the lower surface of the first stay 30.

The vibration isolating member 32 has a substantially hourglass shape, and has threaded portions 33 extending in the axial direction protruding from both end faces thereof. The threaded part 33 passes through the upper surface 31a of the first stay 30 and the receiver part 31, and when this penetrating end is tightened with the nut 34, the vibration isolating part 432 connects with the first stay 30 and the receiver part 31. The power generation unit 7 is interposed between the power generation unit 7 and the power generation unit 7 to elastically support vibration isolation at three locations on both ends along the width direction of the power generation unit 7.

Therefore, as shown in FIG. 1, these two vibration isolating members 32 are attached to a straight line
1-Xl and on both sides of the center of gravity G of the power generation unit 7.
The axis extends along the axial direction of the crankshaft 10 and the rotating shaft 16.

Further, a second support stay 35 constituting a second support portion is attached to the upper and lower surfaces of the bracket 18 that connects the engine 8 and the starter dynamo 9. These second stays 35 are connected to the engine 8 and the starter dynamo 9.
Another receiver provided on the side surface of the front case 28a faces the portion 36 from the rear. This receiver part 36 is constructed by partially recessing the side surface of the front case 28a inward, and between the vertical bottom surface 36a and the second stay 35, another vibration-proofing part is provided in the same manner as above. A member 37 is interposed. This second stay 35 side vibration isolating member 3
7 is interposed between the power generation unit 7 and the inner case 28 with its axis perpendicular to the vibration isolating member 32 on the first stay 30 side, that is, perpendicular to the crankshaft 10 and the rotating shaft 16. They are located on both sides of the center of gravity of the power generation unit 7.

The vibration isolating member 37 passes near the center of gravity G of the power generation unit 7 and is located on the straight line X2-x2 along the axial direction of the crankshaft 10.
As shown in FIG. 1, when the power generation unit 7 is viewed from the front, it intersects with the straight lines X and -X1.

The inner case 28, which supports the power generation unit 7 in a vibration-proof manner in this way, has both front and rear sides formed by the case components 1a and 1.
A cushioning material 38, such as a sponge, is interposed between the inner case 28 and the case components 1a and 1b. Therefore, the inner case 28 is supported in a floating state inside the outer case 1.

An air intake port 40 is opened in the upper surface of the inner case 28 . The air intake 40 opens into the upper chamber 6, and a fan 41 driven by the crankshaft 10 is provided within the air intake 40. When the fan 4 rotates, air in the upper chamber 6 flows into the inner case 28 through the air intake port 41 and cools the power generation unit 7 and the muffler 27. Then, this air flows out into the chamber 6 from the exhaust port 42 opened on the side surface of the front case 28a, and from there, from the exhaust port 42 on one side panel 4a.
It is discharged outward through 3.

In the chamber 6 where the air intake port 40 opens, there is a gas cylinder 4 connected to the gas cylinder.
4 is accommodated. The gas cylinder 44 is filled with pressurized gas such as liquefied butane gas or liquefied propane gas, which serves as fuel for the engine 8, and the gas cylinder 44 is loaded into the exterior case 1 through a cylinder mounting hole 45 provided in one side panel 4a. The cap 46 prevents removal and is retained. A nozzle portion 45a at the tip of the gas cylinder 45 is connected to a socket 47. A pressure regulator 48 for controlling gas pressure to a value slightly higher than atmospheric pressure and a manual main cock 49 are integrated in the receiving port 47. As shown in FIG. 8, this main cock 49 is connected to the intake pipe 12 of the engine 8 via a gas supply path 5o, and a solenoid valve 51 for controlling the gas flow rate is provided on this gas supply path 50. It is being

The chamber 6 on the right side of the starter dynamo 9 and the gas cylinder 44
A prismatic battery 52 is housed in the housing. The battery 52 is placed vertically along the height direction of the exterior case 1 and is connected in parallel to the output end of the starter dynamo 9.

Further, in the chamber 6 on the right side of the battery 52, a cartridge type oil tank 53 is arranged. oil tank 5
3 is a tank mounting hole 54 provided in the other side panel 4b.
It is loaded into the exterior case 1 and held by a cap 46 to prevent removal. An oil outlet 55 at the tip of the oil tank 53 is pressed against a port 56, and an oil pump 58 is provided on an oil passage 57 that connects the port 56 and the intake pipe 12 of the engine 8. .

A radiator 59 of the engine 8 is arranged in the chamber 6 below the oil tank 53 and on the right side of the battery 52 . The radiator 59 is equipped with an electric fan 60, and the radiator 59 and the cylinder 15 of the engine 8 are connected by a coolant circulation path 61 as shown in FIG. In the middle of the circulation path 61, the engine 8
A coolant pump 62 driven by the crankshaft 10 of
A pressure regulating tank 63 is provided which absorbs volume fluctuations due to temperature changes of the coolant.

Further, the radiator 59 faces an outside air suction port 64 provided on the other side panel 4b, and when the electric fan 60 of this radiator 59 rotates, the outside air sucked from the suction port 64 passes through the radiator 59. Exterior case 1
Flow inside. The outside air, which has become high temperature due to heat exchange in the radiator 59, is transferred to the oil tank 53 and gas cylinder 44.
The air is guided to the inner case 28 side through the circumference of the air, and is sucked into the inner case 28 by the fan 41 .

In the figure, reference numeral 65 indicates an output socket for extracting power from the battery 52, BB indicates a power switch, and 67 indicates a starter switch.

Next, the operation of the above configuration will be explained.

On the straight line X1-Xl passing through the center of gravity G of the power generation unit 7, -
In addition to providing the set of vibration isolating members 32, the straight line X1-X
, another set of vibration isolating members 3 is placed on the straight line X2-X2 that intersects with
7, the vibrations of the engine 8 and the starter switch 9 that occur in multiple directions pass through the center of gravity G of the power generation unit 7 and the crankshaft 1, as shown by the arrow in FIG.
It is replaced by a rolling vibration around the 0 axis. Therefore, when the exterior case 1 is placed vertically along the vertical direction as shown in FIGS. 1 and 2, the straight line
Since the axes of the set of vibration isolating members 32 located on 1-X1 are along the axial direction of the crankshaft 10, they receive the weight of the power generation unit 7 as a compressive load and are elastically deformed. is supported in a floating state with respect to the inner case 28 in a vibration-proof manner.

At this time, the other set of vibration isolating members 37 located on the straight line x2-X2 have their axes perpendicular to the crankshaft 10, so they receive the rolling vibration of the power generation unit 7 as a shear load and undergo elastic deformation. However, it functions as a stopper that restricts the movement of the power generation unit 7 beyond the permissible limit.

On the other hand, when the exterior case 1 is placed horizontally along the horizontal direction as shown in FIG.
Next, the vibration isolating members 37 of the other set receive the weight of the power generation unit 7 as a compressive load and undergo elastic deformation, and this power generation unit 7
is supported in a floating state with respect to the inner case 28 in a vibration-proof manner. At this time, the vibration isolating members 32 located on both sides of the power generation unit 7 in the width direction have their axes parallel to the crankshaft lO, so they receive the rolling vibration of the power generation unit 7 as a shear load. functions as a stopper to restrict movement beyond the permissible limit.

In this way, the vibration isolating member 32.
37 changes the direction of the load that these vibration isolating members 32 receive.
．． Since the function of 87 is switched, vibrations of the power generation unit 7 can be efficiently absorbed in either the vertical or horizontal driving position of the exterior case l. Therefore, the vibration of the power generation unit 7 is difficult to be transmitted to the outer case l side, and the resonance of the outer case 1 and the generation of noise due to this resonance can be reliably prevented, and the power generation unit 7 is not supported within the inner case 28. It has the advantage of being reliable.

In the above embodiment, the engine is of a liquid-cooled type, but the present invention is not limited to this. For example, the engine may be of an air-cooled type, or the inner case may cover only the power generation unit.

Furthermore, the bracket that connects the engine crankcase and the starter dynamo is not limited to a box shape, and may be, for example, a simple plate shape. good.

Further, the power generation unit is not limited to being housed in a box-shaped case, and may be supported by a frame made of pipe material, for example.

[Effects of the Invention] According to the present invention described in detail above, vibrations of the power generation unit can be efficiently absorbed in both vertical and horizontal operating positions. There is an advantage that positioning can be performed reliably.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG.
The figure is a cross-sectional view taken along the line 6 is a partially sectional side view of the engine, FIG. 7 is a perspective view of the portable power supply device, and FIG. 8 is a system diagram showing the supply paths of fuel, oil, and coolant to the engine. 7... Power generation unit, 8... Engine, 9... Dynamo (starter dynamo), 18. Bracket, 28
...Support body (inner case), 30...First support part (first stay), 32.87...Vibration isolation member, 35
...Second support part (second stay). Applicant's Representative Patent Attorney Takehiko Suzue

Claims (1)

[Claims] A power generation unit comprising an engine and a dynamo driven by the engine integrally connected by a bracket, and a support for supporting the power generation unit, the power generation unit being on a straight line passing through the center of gravity of the power generation unit. A first support part is provided on both sides of the center of gravity and is vibration-proofly supported by the support body via a vibration-proof member, and the direction in which the first support parts are arranged in parallel is A second support section is provided with a second support section which is anti-vibration-supported via a vibration-isolation member from a direction intersecting with the first support section and located on both sides of the center of gravity. A portable power supply device characterized by being provided with a support section.