JPH0718348B2 - Portable engine work equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable engine working device in which an engine and a working machine such as a generator driven by the engine are integrally combined, and more particularly, the engine and the working machine. The present invention relates to the improvement of the support / storing structure of the main unit consisting of

(Prior Art) Various types of portable engine working devices are known,
Some work machines use not only a generator but also a compressor. The portable engine working device is required to have a low operating noise of the engine, be lightweight, and have good portability such as operability for carrying. For this reason, the engine and the working machine unit are devised so that the engine and the working machine are stacked side by side (for example, Japanese Patent Application No. 60-256).
412), vertically stacked (for example, JP-A-59-39933)
No. 60-77727), etc. Further, generally, in this type of device, the rotor is arranged inside the stator, and the armature coil is provided on the rotor side. Furthermore, in this case,
In order to reduce engine operating noise, it is common to support a main unit such as an engine or a working machine in a soundproof cover (for example, JP-A-59-17097 and JP-A-59-170596).
issue).

(Problems to be Solved by the Invention) Of the above-mentioned conventional techniques, the support structure of the main unit to the soundproof cover is an important element. That is, in the case where the main unit is supported by another mount, the mount is designed so that it can be easily housed in the soundproof cover. Therefore, depending on the support structure, the vibration of the engine cannot be sufficiently absorbed or the usability is poor. In some cases

Also, especially in the type in which the engine and the working machine are vertically stacked, since the mount is usually arranged on the lower side of the working machine (or engine), it is likely to be an obstacle in designing the overall height low, and This mount position is different from the vibration direction of the engine or the like.

Therefore, it is an object of the present invention to provide a portable engine working apparatus having a simple mount structure that effectively absorbs and supports engine vibrations.

(Means for Solving the Problems) In order to achieve this object, the present invention provides an engine, a rotary working machine that is driven by the engine to generate required electric or mechanical energy, the engine and the rotary machine. In a portable engine working device provided with a soundproof cover that supports and houses a main unit including a working machine, the soundproof cover has a tubular shape extending in a longitudinal direction of a cylinder head of the engine, and the soundproof cover is a tube. Is divided into at least two or more covers on the side surface, and the engine and the rotary working machine are arranged so that the output shaft of the engine and the input shaft of the rotary working machine are arranged on a common vertical axis. Moreover, the divided covers are respectively arranged on the outer side in the rotation direction substantially orthogonal to the common axis, and a support portion is provided on the inner surface side of these covers, and An anti-vibration rubber is attached to the supported portion provided in the main unit, and the divided covers are assembled to each other so that the support portion is engaged with the anti-vibration rubber and the main unit is covered by the anti-vibration rubber. It is characterized by being sandwiched between.

Embodiments of the Invention Embodiments of the present invention will be described below with reference to the accompanying drawings. In addition, in each figure, the same reference numerals denote the same objects.

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

The engine unit (100) has a crankcase (102),
A fuel tank (110) and an air cleaner unit arranged on the left side of an engine body (101) composed of a cylinder block (103), a crankshaft (104) extending from a crankcase (102), and an ignition plug (105). (120), muffler unit (1
30) and a recoil starter unit (140) above the crankcase. In the engine body (101), the crankcase (102) and the cylinder block (103) are laterally aligned so that the crankshaft (104), which is the output shaft of the engine, is oriented in the vertical direction. Therefore, the combustion of the fuel in the cylinder block (103) causes the piston (not shown) to reciprocate laterally to rotate the crankshaft (104). The fuel tank (110) is a single component manufactured by molding synthetic resin or the like. In this fuel tank (110), the flange portion (112) of the fuel inlet (111) is fitted to the cover (300) side, and the cover (30
Support on the 0) side. A cap (114) is provided on a portion (113) of the inlet (111) protruding above the cover (300), and fuel can be injected by removing the cap (114). The cleaner unit (120)
As shown in FIG. 2A, the cover plate (121) for fixing the entire unit to the cover (300) side, the cleaner element (122), and the manifold (123) side of the engine (101) are attached. It is equipped with a cleaner case. The muffler unit (130) is shown in Fig. 2 (b).
As shown in (1), a muffler (131), a manifold (132) connecting the engine exhaust port and the muffler (131), and the like are provided.

Below the engine body (101), a generator (20
0) is provided, and the crankshaft (104) that is the engine output shaft is connected to the rotor rotation shaft (201) that is the input shaft of the generator (200). In addition, the engine body (10
A recoil starter (140) is arranged on the upper side of (1), and the rotation shaft of this starter (140) is also connected to the crankshaft (104) side. The recoil starter (140) uses the knob (142) to wind the wound cord (141) into the case (14).
By pulling out from 3), the crankshaft (104) of the engine is rotated and the engine is started. After the cord (141) is pulled out, it is rewound back by the action of a rewinding mechanism (not shown) such as a spring in the case (143). In addition, a mechanism (not shown) for disconnecting after the engine is started is provided for connection with the engine side.

By arranging each component as described above, the left and right sides are near the plane passing through the rotation center axis (A) of the crankshaft (104) and perpendicular to the paper surface, the left side is the cool air side, and the right side is the hot air side. More specifically, the generator unit (200) is made thin, and a common axis (A) in the vertical direction with the crankshaft (104) of the engine (101) and the rotor rotating shaft (201) of the rotary generator (200). Soundproof cover (300) that will be described later
The first side (right side in FIG. 1) of the virtual plane that is substantially orthogonal to the longitudinal direction of the handle (320) (FIG. 5) in FIG.
The second side (left side in FIG. 1) is the low temperature system. Below, this situation will be clear from the explanations of various places.

As shown in FIG. 1 and FIG. 3, the generator (200) includes a rotor rotating shaft (201), a rotor plate (202), a field pole (203), a cooling fan (204), a partition plate (205), It has a bearing (210) and a stator winding (211). The rotor rotation shaft (201) is a tubular body having a through hole (201A) in the axial direction, and the crankshaft (104) of the engine is fitted into the through hole (201A) and fixed with bolts or the like. A disk-shaped rotor plate (202) having a rising portion (202A) with the central axis aligned is mounted on the rotor rotation shaft (201). Rise of outer edge of rotor plate (202) (2
02A) has a predetermined number (for example, 2) arranged at regular intervals.
The field poles (203) composed of permanent magnets of 4) are arranged.
In addition, the rising portion (2
A cooling fan (204) is installed at the end of 02A). This cooling fan (204) has a plurality of fans radially, and the radial center of this fan is made to coincide with the rotation center of the rotor rotation shaft (201). This cooling fan (204) has
An orientation plate (205) that divides each fan vertically is attached. The mounting of the array plate (205) is performed by inserting and engaging each fan of the cooling fan (204) with the slit (205A) of the orientation plate (205). Therefore, the fan of the cooling fan (204) and the slit (205A) of the orientation plate (205) are formed complementarily.

The orientation plate (205) may be unnecessary if the air flow rates from the engine (101) side and the stator (211) side are balanced.

The stator winding (211) is also mounted on the rotor rotation shaft (201) via the ball bearing (210). At this time, the rotation of the stator is blocked on the fixed side such as the crankshaft cover (106) fixed to the crankcase (102) so that only the rotor rotates without rotating the stator winding (211). Stopper (211A)
Is provided. Thus, the stator armature winding (21
By arranging 1) inside the rotor field pole, 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 windings can be increased with a thin coil, and the field pole is arranged in the rotor peripheral portion. The number of poles can be increased. Therefore, it is possible to obtain a thin generator having a large output voltage. In addition, the relatively heavy field pole rotor acts as a flywheel of the engine, and stable rotation and thus stable output voltage can be obtained. The output voltage of the generator is rectified by a three-phase full-wave rectifier circuit and then exchanged with an AC voltage of a predetermined frequency via a voltage stabilizing circuit and an inverter. An electric circuit for obtaining such an alternating current is also provided in a part of the portable engine working device.

Further, the cooling fan (204) has a rising part (202) of the rotor plate (202) corresponding to the orientation plate (205) in order to divide the ventilation path by the cooling fan (204) into upper and lower parts.
Partition plates or guide plates (220), (221), (221) are provided on (A) and the shaft cover (106). Such partition plates or guide plates (220), (221), (222), together with partition members (230), (231) described later, supply cooling air to the engine cylinder head (103) side and muffler (130). It can be separated into sides. The guide plate (220) for sending the cooling air to the cylinder side is, as can be seen from FIG.
It has a spiral rising and displacing shape, which improves ventilation efficiency.

FIG. 4 is an exploded view centering on the engine portion of the portable engine working apparatus according to the embodiment of the present invention described above. Also from this drawing, the cylinder head (103) of the engine is separated from the low temperature system by the partition members (230) and (231), and the exhaust muffler (130) is separated from the low temperature system under the cylinder head (103). I understand that.

That is, FIG. 3 shows partition members (230) and (231) arranged around the crankcase (102) and the cylinder block (103) of the engine. The partition member (230) includes a portion (230A) forming a closed space surrounding the cylinder block (103) and a muffler unit (13).
0) and a plate-shaped portion (230B) for separating the engine side. The partition member (231) penetrates the vicinity of the joint between the crankcase (102) and the cylinder block (103) to separate the low temperature part and the high temperature part of the engine. Further, the partition member (231) has an L-shaped opening (231
A) and the linear opening (231B) below this opening (231A)
Have and. The opening (231A) forms a ventilation path for cooling the engine side, and the opening (231B) is the muffler (13
0) Form a ventilation path for cooling the side. (231
a), (231b), (231c) are packings for fixing the partition member (231) in the cover (300). Also,
(40) is a carburetor provided between the air cleaner (120) and the manifold.

FIG. 5 shows the structure of the cover (300). According to the figure, the cover (300) is a substantially cylindrical main cover composed of two side plates (301) and (302) of extruded aluminum, and is fixed to both ends of the side plates (301) and (302). 6 Nylon resin end covers (310), (330) and a resin handle (320) forming part of the main cover. Side plate (3
A holding rail (305), which is a support portion for integrally mounting the engine unit (100) and the generator unit (200) in the longitudinal direction of the side plates, is formed in the inner center portion of 01) and (302). There is. Rails (306A) and (306B) are provided on the lower end portions of the side plates (301) and (302), respectively, and one leg member (341) is fitted into one end of these rails (306A) and (306B). As a result, the lower ends of the two side plates (301) and (302) are fixed, and the lower ends of the side plates (301) and (302) are fitted into the fitting grooves (308A) and (308B). The two leg members (342A) and (342B) form the leg portion of the device. In addition, the upper edge portion (30) of the side plates (301) and (302)
1A), (302A) slide the groove (320A) formed in the thickness of the flat part of the handle (320) to
The upper ends of the two side plates (301) and (302) are fixed. An opening for cooling and sucking air is formed in the switch recess (301B) of the side plate (301). Cooling air exhaust ports (311) and (312) are formed in the end cover (310), and a cover plate (313) for replacing the plug (105) is detachably fitted and fixed. You can Handle (320)
A guide means for the recoil starter (140) is formed on the. The end cover (330) is provided with a cooling air suction port (331), an air cleaner opening (332), and an electrical component opening (333). Ventilation openings for cooling air (331)
Is formed at a position where the inflowing air collides with the fuel tank (110), and the air diffuses to various places in the machine to enhance cooling efficiency.

By thus forming the openings for various cooling air ventilation, the cooling air flows as shown by the arrow in FIG. In addition, the opening for cooling air ventilation that opens to the outside of the case (300) includes a fuel tank (110), a partition member (230),
Since the ventilation maze is formed by (231) and the like, it is possible to reduce the rate at which the operating noise of the engine or the like is leaked to the outside. Particularly, when the fuel tank (110) contains fuel, it acts as a heavy object, so that the soundproofing effect can be enhanced.

In addition, as the cooling air flows in one direction from the low-temperature system to the high-temperature system as described above, cooling efficiency is good and the high-temperature system concentrates mainly on the end cover (310). The thermal diffusion of is also easily performed. Since the fuel system belongs to the low temperature system, it can be a condition under which vapor lock is unlikely to occur.

Further, since the engine cylinder head (103) and the muffler (130) are present in the end cover (310), maintenance and inspection such as plug replacement can be easily performed by attaching and detaching the end cover (310). Moreover, it is possible to perform maintenance inspection work while paying attention to the concentration of high-temperature parts, especially immediately after the engine is stopped. Similarly, by attaching and detaching the end cover (330), maintenance attention of the low-temperature system can be obtained. It can be easily implemented.

Next, place the engine (1
The state of housing and supporting the main unit such as 01) and the generator (200) will be described with reference to FIGS. 4, 6 and 7.
First, the engine (101) and the generator (200) are integrated by fixing the generator (200) to the crankcase (102) of the engine.
In 2), the protruding leg portions (71), (72), (7) which are supported portions having a cross-sectional shape complementary to the above-mentioned holding rail (305).
3), (74) are formed, that is, the holding rail (3
05) are formed inside the side plates (301) and (302) that form the main cover, respectively. This retaining rail (305)
Extend in the axial direction of the cylindrical main cover and are substantially parallel to each other. Further, the cross section of the holding rail (305) is substantially channel-shaped. This retaining rail (30
Since both ends of 5) are open, after engaging the protruding legs (71), (72), (73), (74) of the main unit with one end of this rail (305), The main unit is slid along the rail (305), and the vicinity of its lower end is brought into contact with a contact member provided on the main cover and the end cover (310) to be stored at a predetermined position. At this time, the leg portion (71),
(72), (73), (74) have cap-shaped anti-vibration rubber (6
Insert the 1) and (62) into this anti-vibration rubber (61) and (62).
Are clamped by the retaining rails (305). By assembling the side plates (301) and (302) thus divided, the main unit is sandwiched between the side plates (301) and (302) via the vibration-proof rubbers (61) and (62). Further, a stopper member (75) which is sandwiched between the main cover (301) and the end cover (330) is fitted and fixed to the leg portion (71). Thus, the reaction force generated on the rotary generator (200) side by the rotation of the engine can be absorbed by the cover via the vibration isolating rubber.

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 can be replaced. It is obvious to a person skilled in the art that it is possible. For example, the case where the working machine is a generator has been described, but other working machines may be used.

(Effect of the Invention) According to the present invention, the main cover is divided into two or more parts, and the divided covers are assembled to each other, so that the support portion provided on the cover is engaged with the vibration-proof rubber of the main unit. The unit can be sandwiched between the soundproof covers via the anti-vibration rubber, so the main unit can be sandwiched between the covers via the anti-vibration rubber by simply assembling the divided covers together. On the other hand, if the present invention is used, effective vibration isolation of the portable engine working machine can be achieved. The other effects of the present invention, particularly the effects when the rotary working machine is the outer rotor type generator, will be further described as follows.

(1) When the working machine is an outer rotor type generator, the peripheral speed of the rotor can be increased, and a larger output can be obtained than that of the inner rotor type even at the same rotation speed. Therefore, the radius can be increased and the height can be reduced. Furthermore, in this case, it can be expected that the rotor functions as a flywheel.

(2) Further, when the outer rotor type large diameter generator is arranged in the lower part of the engine, it is expected that the operation is stabilized by the so-called gyro effect. The aforementioned device for setting the center of gravity also works well for stable operation. Therefore, for example, the natural movement of the device due to the rotation of the engine is eliminated.

(3) By fixing the cooling fan by utilizing the outer circumference of the rotor, the space of the bearing portion is effectively utilized, which contributes to downsizing.

(4) From the above (1), sufficient output can be obtained even when the engine speed is reduced, which can contribute to noise reduction.

(5) In addition, the features described in various places in the specification are caused by the basic configuration of the present invention as described above.
This is the effect of the present invention.

[Brief description of drawings]

FIG. 1 is a side view of a portable engine working apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory view of main parts of a portable engine working apparatus according to an embodiment of the present invention, and FIG. 3 is an implementation of the present invention. Another essential part explanatory view of a portable engine working device according to an example, FIG. 4 is an exploded explanatory view of still another major part of a portable engine working device according to an embodiment of the present invention, and FIG. FIG. 6 is an exploded view of still another main part of the portable engine working apparatus according to the embodiment, and FIGS. 6 and 7 show the relationship between the main unit and the soundproof cover of the portable engine working apparatus according to the embodiment of the present invention. It is an explanatory view shown. In the drawings, (61) and (62) are anti-vibration rubbers, and (71) to
(74) is the supported part of the main unit, (101) is the engine,
(104) is an output shaft, (110) is a fuel tank, (200) is a generator, (300) is a soundproof cover, (301) and (302) are cover side plates, (305) is a holding rail, (310), (330) is an end cover, and (320) is a handle forming a part of the main cover.

Claims (5)

[Claims] 1. An engine, a rotary working machine driven by the engine to generate required electric or mechanical energy, and a soundproof cover for supporting and housing a main unit including the engine and the rotary working machine. In the portable engine working device, the soundproof cover has a tubular shape extending in a longitudinal direction of a cylinder head of the engine, and the soundproof cover is divided into at least two or more covers on a tubular side surface, and the engine and the engine The rotary working machine is arranged so that the output shaft of the engine and the input shaft of the rotary working machine are arranged on a common axis in the vertical direction, and is divided to the outside in the rotation direction substantially orthogonal to the common axis. The covers are arranged respectively, the supporting parts are provided on the inner surface side of these covers, and the anti-vibration rubber is attached to the supported parts provided on the main unit. A portable engine working device characterized in that the split covers are assembled with each other so that the support portion is engaged with the vibration isolating rubber and the main unit is sandwiched by the sound isolating cover via the vibration isolating rubber. 2. A portable engine working apparatus according to claim 1, wherein the supporting portion is constituted by a holding rail provided on an inner side surface of the soundproof cover. 3. The device according to claim 1 or 2, wherein the soundproof cover comprises two end covers for closing both ends of the divided two covers. Portable engine work equipment. 4. The apparatus according to any one of claims 1 to 3, wherein the rotary working machine is an outer rotor type generator in which a rotor is arranged on an outer circumference of a stator. A portable engine working machine. 5. The portable engine working machine according to claim 4, wherein the generator is arranged below the engine with respect to the vertical common shaft.