JPH0435609B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a portable engine power generation device that integrally includes an engine and a generator driven by the engine.

(Prior Art) Portable engine power generation devices driven by an engine are mainly used for leisure activities and outdoor work.
This type of portable engine generator is required to have low operating noise, be small and lightweight, and have excellent operability and portability.

For example, as shown in Japanese Patent Application Laid-Open No. 59-39933, the output shaft of the engine and the rotating shaft of the generator connected to this output shaft are installed on the same axis along the vertical direction, and power is generated under the engine. It is known that the device is made more compact by arranging the devices in a different manner, and its portability is improved.

(Problem to be solved by the invention) However, if the engine is placed above the generator in this way, the overall area can be made more compact by keeping the planar projected area small; In some cases, the length becomes longer and the stability deteriorates.

Therefore, in such a portable engine generator, it may be possible to improve stability by making the generator an outer rotor type in which the rotor rotates around the outer periphery of the stator. A cooling fan is provided between the engine and the cooling fan, and in such a case, how to install this cooling fan will provide an appropriate cooling effect for the entire system, and it can be easily installed with a simple configuration. The question arises as to whether it can be done.

Therefore, the present invention was made to solve these problems, and its purpose is to provide a cooling fan mounting structure that takes advantage of the characteristics of an outer rotor type generator, thereby achieving an appropriate cooling effect for the entire system. An object of the present invention is to provide a portable engine power generation device that has a simple configuration and can be easily installed.

(Means and effects for solving the problem) To achieve this object, the present invention provides an engine 10
1 and a generator 200 driven by the engine 101, the generator 200 is driven by the engine 1.
In an outer rotor type generator including a rotor plate 202 connected to the output shaft 104 of the engine 101 near the outer periphery of the stator 211, the opposite side of the outer rotor to the engine is connected to the output shaft 104 of the engine 101, and Said engine 1
01 and the generator 200, a cooling fan 204 whose blade portions 204a extend radially inward from the outer circumferential side is disposed and supported in an opening of a rotor plate 202 forming the outer shell of the outer rotor. The blade portion 204a of the cooling fan 204 distributes cooling air between the engine 101 side and the stator 211.
It is characterized by being equipped with an orientation plate 205 for sucking air from two directions on the side and sending the air outward in the radial direction.

(Example) Examples of the present invention will be described below with reference to the accompanying drawings. Note that the same reference numerals in each figure indicate similar objects.

FIG. 1 shows a portable engine power generator according to an embodiment of the present invention. According to the figure, the portable engine power generator according to an embodiment of the present invention mainly includes an engine unit 100, a generator unit 200, and case 300.

The engine unit 100 includes a crankcase 1
02, an engine body 10 consisting of a cylinder block 103, a crankshaft 104 extending from the crankcase 102, and a spark plug 105.
1, a fuel tank 110 and an air cleaner unit 120 are arranged on the left side, a muffler unit 130 is arranged on the right side, and a recoil starter unit 140 is arranged on the upper side of the crankcase. The engine body 101 has a crankcase 102 and a cylinder block 103 aligned in the lateral direction so that the crankshaft 104, which is the output shaft of the engine, is oriented vertically. Therefore,
Combustion of fuel within cylinder block 103 causes a piston (not shown) to reciprocate laterally, causing crankshaft 104 to rotate. The fuel tank 110 is a single component manufactured by molding synthetic resin or the like. This fuel tank 110 has a flange-like portion 112 of a fuel inlet 111 connected to a case 3.
00 side and supported on the case 300 side. A cap 114 is provided on a portion 113 of the injection port 111 that projects upward from the case 300.
By removing this cap 114, fuel can be injected. Cleaner unit 120
As shown in FIG. 2a, there is a cover plate 12 for fixing the entire unit to the case 300 side.
1, cleaner element 122, and engine 1
It is equipped with a cleaner case 123 and the like that can be attached to the manifold side of 01. Muffler unit 1
30, as shown in FIG. 2b, a muffler 131;
It includes a manifold 132 that connects an engine exhaust port and a muffler 131.

A generator 200, which will be described later, is arranged below the engine body 101, and a crankshaft 104, which is an engine output shaft, is connected to a rotor rotation shaft 201, which is a rotation shaft of the generator 200. Further, a recoil starter 140 is arranged above the engine body 101, and this starter 14
The rotating shaft of No. 0 is also connected to the crankshaft 104 side. The recoil starter 140 is connected to the crankshaft 1 of the engine by pulling out the wound cord 141 from the case 143 using the knob 142.
04 to start the engine. After the cord 141 is pulled out, it is rewound to its original position by the action of a rewinding mechanism (not shown) such as a spring inside the case 143. Further, a mechanism (not shown) is provided for connection to the engine side so that the connection is disconnected after the engine is started.

By arranging each component as described above, the left side is the cold air side and the right side is the hot air side on the left and right sides near the plane passing through the rotation center axis A of the crankshaft 104 and perpendicular to the plane of the paper.

As shown in FIGS. 1 and 3, the generator 200 includes a rotor rotating shaft 201 and a rotor plate 20.
2, field pole 203, cooling fan 204, partition plate 2
05, a bearing 201, and a stator winding 211. The rotor rotation shaft 201 is a cylindrical body having an axial through hole 201A.
Fit the engine crankshaft 104 into 1A and secure with bolts or the like. This rotor rotation shaft 201
A disc-shaped rotor plate 202 having a rising portion 202A with its central axis aligned is mounted around the rotor plate.
Rising portion 202 on the outer periphery of rotor plate 202
At A, field poles 203 made up of a predetermined number (for example, 24) of permanent magnets are arranged at regular intervals. Further, a cooling fan 204 is provided at the end of the rising portion 202A on the outer periphery of the rotor plate 202.
Install. The cooling fan 204 has a plurality of radial fans, and the radial center of the fan is made to coincide with the rotation center of the rotor rotation shaft 201. This cooling fan 204 is equipped with an orientation plate 205 that divides each fan vertically and efficiently sucks cooling air from two directions: the engine 101 side and the stator 211 side. The mounting of the orientation plate 205 is carried out as shown in FIG. 3, for example.
This is done by inserting and engaging each fan of the cooling fan 204 into the slit 205A of No. 5. Therefore, the fan of the cooling fan 204 and the slit 205A of the orientation plate 205 are formed complementary to each other. Note that this orientation plate may be unnecessary if the air volumes from the engine 101 side and the stator 211 side can be balanced.

FIG. 3 shows various embodiments of the fan configuration shown in FIG.
It is attached to the two ends via a pedestal 204b, and the pedestal 204b and the orientation plate 205 are connected by bolts 20.
4c is shown. b is each fan 2
04a and a pedestal 204b are integrated, and the orientation plate 205 is locked to a protrusion provided on the pedestal.
c is a first fan 204A having a pedestal 204B;
, a second fan 204B equipped with an orientation plate 205
This shows what is installed.

Further, FIG. 3 is a diagram showing the mounting structure of the fan to the rotor, in which a is fixed by a bolt 204e provided between the pedestal 204b of the fan 204 and the bottom of the rotor plate 202, passing through the field pole 203. Type b is a type in which the base of the fan is fixed to the end of the rotor plate 202 with bolts 204f, and type c is a type in which a locking hole 202a is provided near the end of the rotor plate 202, and this locking hole 20
2a is a locking portion 20 provided on the fan base 204b.
4d and rotor plate 20.
The locking part 202b provided at the end of 2 is fitted into the locking groove 204e provided on the base 204b of the fan, and the locking part 202b is fitted into the locking groove 204e provided in the fan base 204b. The rotor plate 202
e is configured to be locked in a locking hole 202b provided at the end of the rotor plate 202; It shows what was done.

The stator winding 211 is connected to the rotor rotating shaft 21 via a ball bearing 210 which is a bearing.
1. At this time, a rotation regulating member for regulating the rotation of the stator is installed on a fixed side such as the crankshaft cover 106 fixed to the crankcase 102 so that only the rotor rotates without the stator winding 211 rotating. 211A is provided. In this way, the stator 211 is moved to the rotor plate 202 by the action of the rotation regulating member 211A.
It is easy to attach the ball bearing 210 to the air gap S, which is the distance between the stator 211 and the rotor field poles 203. Case 1
It can be easily mounted compared to fixing to 02, etc., and the mounting accuracy can be improved. Further, by arranging the stator armature winding 211 inside the rotor field poles, an outer rotor rotating field type synchronous generator can be constructed.
According to such a generator, since the armature winding can be extended and wound in the axial direction, the number of turns can be increased with a thin coil, and since the field poles are arranged around the rotor, The number of poles can be increased. Therefore, a thin generator with a large output voltage can be obtained. In addition, the field pole rotor, which is relatively heavy, acts as a flywheel for the engine, making it possible to obtain stable rotation and, in turn, stable output voltage. Note that the output voltage of the generator is rectified by a three-phase full-wave rectifier circuit, and then converted to an alternating current voltage of a predetermined frequency via a voltage stabilization circuit, an inverter, and the like. An electric circuit for obtaining such an alternating current of a predetermined frequency is also included in a part of the portable engine working device.

Furthermore, the cooling fan 204 includes a cooling fan 2
In order to divide the ventilation path by 04 into upper and lower halves, partition plates or guide plates 220, 221, 222 are provided on the rising portion 202A of the rotor plate 202 and the shaft cover 106 in correspondence with the orientation plate 205. Such a partition plate or guide plate 220,2
21 and 222 are partition members 230 and 23, which will be described later.
1, the cooling air can be separated into the engine cylinder block 103 side and the muffler 130 side. As can be seen from FIG. 4, the guide plate 220 for sending the cooling air toward the cylinder head 103 has a spiral upward displacement shape to improve ventilation efficiency.

FIG. 4 is an exploded view mainly showing the engine portion of the portable engine generator according to the embodiment of the present invention described above.

According to the figure, the engine crankcase 10
2 and the partition members 230 and 231 arranged around the cylinder block 103 can be clearly seen. That is, the partition member 230 consists of a portion 230A that forms a closed space surrounding the cylinder block 103, and a plate-shaped portion 230B that separates the muffler unit 130 from the engine side. The partition member 231 passes through the vicinity of the joint between the crankcase 102 and the cylinder block 103, and separates a low-temperature section and a high-temperature section of the engine. Furthermore, the partition member 231 has an L-shaped opening 231A and a linear opening 231B below the opening 231A. The opening 231A forms a ventilation passage for cooling the engine side, and the opening 231B forms a ventilation passage for cooling the muffler 130 side. 231a, 231b, 231
c is a packing for fixing the partition member 231 within the case 300. Further, 40 is a carburetor provided between the air cleaner 120 and the manifold.

FIG. 5 shows the structure of the case 300. According to the same figure, the case 300 is made of two extruded aluminum parts.
side plates 301, 302, this side plate 301, 30
End covers 310, 330 made of 6 nylon resin fixed to both ends of 2, and a handle 32 made of resin
0. A holding rail 305 for integrally mounting the engine unit 100 and the generator unit 200 is formed inside the side plates 301, 302 in the longitudinal direction of the side plates. side plate 301,
Rails 306A, 3 are provided at the lower end of 302, respectively.
06B, and these rails 306A, 306
By fitting one leg member 341 into one end of B, the lower ends of the two side plates 301, 302 are fixed. The one leg member 342A, 342B constitutes a leg portion of the device. In addition, side plates 301, 302
By sliding grooves 320A formed within the thickness of the flat portion of the handle 320 on the upper edges 301A, 302A, the two side plates 301, 302
The top edge of is fixed. An opening for cooling air is formed in the switch recess 301B of the side plate 301. The end cover 310 has cooling air exhaust ports 311 and 312 formed therein, and the plug 10
A cover plate 313 for replacing No. 5 can be removably fitted and mounted. handle 320
A guide means for the recoil starter 140 is formed therein. The end cover 330 is formed with a cooling air vent 331, an air cleaner opening 332, and an electrical component opening 333. The cooling air intake port 331 is formed at a position where the inflowing air collides with the fuel tank 110, and the air is diffused to various parts of the cabin to improve cooling efficiency.

By forming various openings for ventilation of cooling air in this manner, cooling air flows as shown by the arrows in FIG. Furthermore, the opening for cooling air ventilation that opens to the outside of the case 300 is located at the fuel tank 11.
0. Since a ventilation labyrinth is formed by the partition plates 230, 231, etc., it is possible to reduce the rate at which the operating noise of the engine or the like is lost to the outside. In particular, when the fuel tank 110 contains fuel, it acts as a heavy object, so that the soundproofing effect can be enhanced.

The present invention is not limited to the above embodiments and modifications, and various other embodiments and modifications are possible within the technical scope of the present invention, and equivalent components may be replaced. It is clear to the person skilled in the art that this is possible. For example, although the outer rotor type generator has been described as a rotating field type generator, a rotating armature type generator may also be used depending on the case. In addition, a recoil starter 140, an engine 101, and a generator 200
It is also possible to change the top and bottom arrangement order.
Furthermore, although the case where the generator is directly connected to the engine has been described, it can also be geared down.

(Effects of the Invention) According to the present invention, as described above, the cooling fan has a simple structure in which the cooling fan is supported on the rotor plate of the outer rotor type generator and rotates integrally with the rotor plate. It is extremely easy to install, and the engine and stator can be efficiently cooled to provide an appropriate cooling effect for the entire system.

In particular, since the fan is installed so as to extend inward from the outer circumferential side of the outer rotor, the gap portion and winding portion of the rotor and stator can be effectively cooled.

Furthermore, in this embodiment, the cooling fan is provided with an orientation plate, as well as a partition plate and a guide body, so that the above-mentioned effects can be further improved.

[Brief explanation of drawings]

FIG. 1 is a side view of a portable engine power generator according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of main parts of a portable engine power generator according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. 2 shows other explanatory diagrams of main parts of the portable engine generator according to the example, 1 is an exploded perspective view of the generator, 1 is a diagram illustrating another example of the fan configuration, and 1 is a diagram showing the mounting structure of the cooling fan on the rotor plate. 4 is an exploded explanatory view of still another main part of the portable engine power generator according to the embodiment of the present invention, and FIG. FIG. In the drawing, 101 is an engine, 104 is an output shaft, 110 is a fuel tank, 200 is a generator, 20
2 is a rotor, 204 is a cooling fan, and 211 is a stator.

Claims (1)

[Scope of Claims] 1. A portable engine power generation device comprising an engine and a generator driven by the engine, wherein the generator connects a rotor plate connected to an output shaft of the engine to a stator. In an outer rotor type generator provided near the outer periphery, a rotor plate that connects the opposite side of the outer rotor to the output shaft of the engine and forms an outer shell of the outer rotor between the engine and the generator. A cooling fan whose blade portion extends radially inward from the outer peripheral side is disposed and supported in the opening of the cooling fan, and the blade portion of the cooling fan sucks cooling air from two directions, the engine side and the stator side. 1. A portable engine power generating device characterized by comprising an orientation plate for sending each of the fuels outward in a radial direction. 2. The portable engine power generator according to claim 1, wherein the engine is disposed above the generator.