CN206035576U - Engine device that workover rig and workover rig were used - Google Patents

Abstract

The utility model provides an engine device that workover rig and workover rig were used. In the engine device of workover rig, the killer tube overlaps around the carburetor each other, improves the equipment operation nature of engine device. In engine device (4), separator (27) independently form for air cleaner (21), enter into mixed gas and oil after crank chamber (38) from jar room (36) and mix mixed fluid entering this separator (27) of forming, and gas -liquid separation will be carried out to the mixed fluid that gets into in this separator (27) and the gas composition that obtains supplies with to air cleaner (21). The separation chamber (71) of separator (27) through making jar portion (33) and crankcase (32) coincide in engine body (25).

Description

The engine device of working rig and working rig

Technical field

This utility model is related to the engine device of working rig and working rig.

Background technology

In the engine device of working rig, air filter and the change for generating the gaseous mixture of air and fuel Oily device is installed on engine main body, from the air inlet supply mixing for being installed to the carburetor of the engine main body to engine main body Gas.

In addition, in engine main body, for example, the burning linked in the cylinder chamber moved up and down for piston and with air inlet Rocker arm chamber is provided with room, the driving machine for the valve being opened and closed to air inlet and air vent is configured with rocker arm chamber Structure.Also, circulate to rocker arm chamber via the oil of crankshaft room, the drive mechanism of rocker arm chamber is moistened using the oil of the circulation It is sliding.

In the cylinder chamber, produce micro fuel mixture and pass through and alter into the so-called of crankshaft room on the side of piston Gas.The gas blowby is mixed with oil in crankshaft room etc..If the fluid-mixing of fuel and oil beside intake channel, the valve by and enter Enter in fuel room, then produce unfavorable condition as the increase of white cigarette and oil consumption.In addition, propellant composition and oil mixing, because This is likely to cause unfavorable condition as the deterioration for promoting oil component.

Therefore, in the engine device of working rig, set in the bottom of air filter as in patent documentation 1 Put separator.The fluid-mixing gas-liquid separation of the gas blowby and oil generated in rocker arm chamber is made using the separator, makes what is isolated Gas componant (propellant composition) is supplied to engine main body again from air filter.Thus, it is unburned contained by fluid-mixing The fuel of burning burns in engine main body.In addition, liquid component (oil component) the return engine main body isolated.

Prior art literature

Patent documentation

Patent documentation 1：2013 No. 068119 publications of Japanese Unexamined Patent Publication

Utility model content

Utility model problem to be solved

However, as in patent documentation 1 with air filter integrally provided with separator in the case of, need by Pipe for linking the fluid-mixing of the rocker arm chamber and separator of engine main body, gas blowby and oil is winding from engine main body To air filter.Also, in the engine device of working rig, carburetor, air filter etc. are installed on engine main body, Therefore, the pipe of fluid-mixing passes through around carburetor.

On the other hand, carburetor needs and the pipe of fuel is supplied for example from fuel tank to carburetor, the unnecessary of carburetor is made Fuel return multiple Guan Lian such as the pipe of fuel tank, the pipe of pulse paths that the pressure for making fuel gasification is supplied to carburetor Knot.

As a result, around carburetor, the pipe that links with carburetor is Chong Die with the pipe of fluid-mixing and rub, pipe Installation exercise spends labour and time, and the assembling operation of engine device deteriorates.

So, in the engine device of working rig and working rig, killer tube is overlapped around carburetor each other, Thus, it is desirable to improve the assembling operation of engine device.

For solution to problem

The engine device of working rig of the present utility model includes：Engine main body, which has first for overlapping each other Portion and second, in being internally formed for first for being superimposed together and second：For the cylinder chamber that piston is moved up and down；It is bent Axle room, the bent axle rotated with moving up and down for piston are configured at the crankshaft room；And oil is at least made in bent axle indoor circulation Oil circulating system；Air filter, extraneous air enter engine main body via the air filter；Carburetor, which is used for Generate the gaseous mixture of entered extraneous air and fuel and supply to engine main body；And separator, which is relative to air Cleaner is separately formed, and the fluid-mixing that the gas blowby and oil to crankshaft room is entered into from cylinder chamber is mixed attracts, right Fluid-mixing carries out gas-liquid separation.Also, separator with by make first and second overlapping and be formed at and mobilize owner Internal separation chamber, the gas componant that the gas-liquid separation in separation chamber is gone out to air filter supply, will in separation chamber gas The liquid component that liquid is isolated is via returning oil circulating system in engine main body.

Preferably, using the composition surface for being formed at first and second at least one of composition surface recess It is preferred to form separation chamber.

Preferably, first be cylinder portion, second be that crankcase is preferred.

Preferably, engine main body has：Form the fuel tank of oil stock room；The work of oil stock room is communicated to from separation chamber Industry hole；And the plug member in operation hole is blocked operation hole can be installed in the way of dismantling relative to operation hole, by recessed Portion and plug member form separation chamber and are preferred.

Preferably, composition surface opening of the operation hole in crankcase, plug member with can relative to crankcase dismounting In the way of mode is installed on crankcase, a part of the engine device with the composition surface to constitute crankcase side for working rig The holding member of plug member is kept to be preferred.

Preferably, the engine device of working rig has the oily path for being formed at cylinder portion and leading to cylinder chamber, is separating Cylinder chamber of the liquid component that gas-liquid separation goes out in room from the inner space being made up of crankshaft room and cylinder chamber returns oil circulation system System is preferred.

Preferably, scope from oily path relative position to separation chamber of the operation hole on the composition surface of crankcase Inner opening, the part that plug member constitutes the composition surface of crankcase by being installed on operation hole are preferred.

Preferably, engine main body has：Rocker arm chamber, which is formed on cylinder chamber, is a part for oil circulating system, For oil circulation；And the path of fluid-mixing, which is communicated to separation chamber from rocker arm chamber, and separator is from rocker arm chamber via fluid-mixing Path attraction carried out to fluid-mixing be preferred.

Working rig of the present utility model have lengthwise action bars, be installed on action bars one end instrument and be installed on The engine pack of the other end of action bars, it is characterised in that engine pack includes：Engine main body, which has folds each other First and second for closing, in being internally formed for first for being superimposed together and second：Move up and down for piston Cylinder chamber；Crankshaft room, the bent axle rotated with moving up and down for piston are configured at the crankshaft room；And oil is at least made in bent axle The oil circulating system of indoor circulation；Air filter, extraneous air enter engine main body via the air filter；Carburetion Device, which generates the gaseous mixture of entered extraneous air and fuel and supplies to engine main body；And separator, its relative to Air filter is separately formed, and the fluid-mixing that the gas blowby and oil to crankshaft room is entered into from cylinder chamber is mixed is inhaled Draw, gas-liquid separation is carried out to fluid-mixing.Also, separator is formed at electromotor with overlapping by first and second Separation chamber in main body, the gas componant that the gas-liquid separation in separation chamber is gone out are supplied to air filter, are made in separation chamber The liquid component that gas-liquid separation goes out is via returning oil circulating system in engine main body.

The effect of utility model

In this utility model, separator is separately formed relative to air filter, with engine main body one landform Into.Thus, that is, pipe that the fluid-mixing of gas blowby and oil supply to separator is used in from being for example located at the upper of engine main body Rocker arm chamber on the crankshaft room in portion, the crankshaft room is winding to separator, it is also possible to the pipe is not passed through around carburetor. Even if as a result, the pipe of fuel being supplied for example from fuel tank to carburetor, making the unnecessary fuel of carburetor return fuel tank Multiple pipes such as pipe, the pipe of pulse paths that the pressure for making fuel gasification supply to carburetor and carburetor link, these with The pipe and the pipe of fluid-mixing that carburetor links also is not overlapped around carburetor.Pipe is difficult to around carburetor each other Overlap and rub, the installation exercise of pipe becomes easy, and the assembling operation of engine device is improved.

In addition, making the liquid component that the gas-liquid separation in separation chamber goes out via returning oil circulating system in engine main body. Thus, without the need for the pipe of the return path.Thus, the installation exercise of pipe also becomes easy, and the assembling operation of engine device is obtained To improvement.

As long as in addition, separator to be configured at the boundary portion of crankcase, in the case where the liquid oil isolated is revealed, liquid is oily Flow in bent axle room, thus, it is also possible to prevent oil from leaking to external engine.

In addition, generally divided two parts form separator when using engine maintenance, therefore, it is possible to improve dimension Shield property.

In addition, in this utility model, the formed using the composition surface at least one of cylinder portion and crankcase One recess, and the separation chamber of separator by cylinder portion and crankcase are overlapped, is formed in engine main body.Thus, it is possible to phase For the cylinder portion before assembling or crankcase are readily formed for forming the construction of separator.And, after assembling, separator Separation chamber is integratedly located in engine main body, therefore, it is possible to separator is configured in the vicinity of the center of gravity of engine device, energy Enough improve the weight balancing of engine device.

In addition, in this utility model, separator is separately formed relative to air filter, therefore, it is possible to make air The compact dimensions of cleaner, can suppress stretching out for air filter, can make the compact dimensions of engine device.Separately Outward, even from use environment, service life changing air filter, separate without changing together with air filter Device.

Description of the drawings

Fig. 1 is the axonometric chart of the brush cutter 1 of the 1st embodiment of the present utility model.

Fig. 2 is the explanatory diagram of the use state of the brush cutter 1 of Fig. 1.

Fig. 3 is the longitudinal section (left and right directions) of the engine pack 4 of Fig. 1.

Fig. 4 is the explanatory diagram of the oil circulating system 50 of the engine main body 25 of Fig. 3.

Fig. 5 is the left view of configuration, Fig. 3 the engine main body 25 of the separator 27 for representing Fig. 4.

Fig. 6 is the in-built of separator 27, the partial cutaway part left view of the engine main body 25 of Fig. 3 for representing Fig. 5 Figure.

Fig. 7 is the in-built of separator 27, the partial cutaway part backsight of the engine main body 25 of Fig. 3 for representing Fig. 5 Figure.

Fig. 8 is the explanatory diagram of the bottom surface (composition surface) for arranging separator 27 for representing cylinder portion 33.

Fig. 9 is the explanatory diagram of the upper surface (composition surface) for arranging separator 27 for representing crankcase 32.

Figure 10 is in-built, the engine main body for representing the separator 27 in the 2nd embodiment of the present utility model 25 partial cutaway fragmentary rear elevation view.

Figure 11 is in-built, the engine main body for representing the separator 27 in the 3rd embodiment of the present utility model 25 partial cutaway fragmentary rear elevation view.

Figure 12 is in-built, the engine main body for representing the separator 27 in the 4th embodiment of the present utility model 25 partial cutaway fragmentary rear elevation view.

Figure 13 is configuration, the engine main body 25 for representing the separator 27 in the 5th embodiment of the present utility model Longitudinal section (left and right directions).

Description of reference numerals

1st, brush cutter (working rig)；2nd, action bars；4th, engine pack (engine device)；8th, cutter (instrument)；21、 Air filter；22nd, carburetor；25th, engine main body；27th, separator；28th, cover component；31st, fuel tank；32nd, crankcase；S32、 Composition surface；33rd, cylinder portion；S33, composition surface；35th, piston；36th, cylinder chamber；37th, bent axle；38th, crankshaft room；42nd, rocker arm chamber；43rd, it is internal Space；50th, oil circulating system；51st, oil stock room；71st, separation chamber；74th, discharge path；81st, separator hole (separator it is recessed Portion)；82nd, the 1st recess (recess discharged)；83rd, second recesses (recess discharged)；84th, return aperture (oily path)；91st, 1 groove (recess of separator, the recess discharged)；92nd, the 2nd groove (recess discharged)；101st, operation hole；102nd, thromboembolism structure Part, 103, holding member；104th, fluid-mixing path.

Specific embodiment

Hereinafter, the working rig and engine device of embodiment of the present utility model are illustrated based on accompanying drawing.

[the 1st embodiment]

Fig. 1 is the axonometric chart of the brush cutter 1 of the 1st embodiment of the present utility model.Brush cutter 1 is to growing on the ground The working rig that gathered in such as weeds, be an example of working rig.

Outside installation portion 3 of the brush cutter 1 of Fig. 1 with such as action bars 2, instrument, engine pack 4, fixed part 5, vibrationproof Shell 6 and handle 7.Engine pack 4 is an example of engine device.

Action bars 2 is for example formed by the pipe component of lengthwise.Action bars 2 can also be the segmentation structure for linking multiple pipe components Make.Drive shaft (not shown) is configured in pipe component.

The installation portion 3 of instrument is installed on one end of the action bars 2 of lengthwise.Installation portion 3 has such as tool chuck and instrument Cover.For example, as shown in Fig. 2 installing 8 grade instrument of cutter on tool chuck in the way of it can change.Tool cover is installed on Action bars 2, covering are installed in the rear side of the instrument of tool chuck.

Engine pack 4 is installed on the other end of the action bars 2 of lengthwise.Engine pack 4 has cover component 28, in cover structure Storage 25 grade component of engine main body described later in part 28.In one end connection tool of the drive shaft being configured in action bars 2 The tool chuck of installation portion 3.Clutch mechanism and drive shaft of the bent axle 37 of engine main body 25 by engine main body 25 The other end links.Thus, in the presence of the driving force of engine main body 25, the instrument for being installed in tool chuck can be driven And rotate the instrument.

Fixed part 5 is installed on the substantially central portion of the longitudinally of action bars 2.

Vibrationproof shell 6 has hollow drum.Vibrationproof shell 6 have passed through the state of the vibrationproof shell 6 with action bars It is located between engine pack 4 and fixed part 5 together with elastic component (not shown).By so with vibrationproof shell 6 from operation The state that bar 2 floats installs vibrationproof shell 6, and the vibration of engine main body 25 is difficult to transmit to vibrationproof shell 6 via action bars.

Handle 7 has the handlebar of such as U-shaped, handle.The central part of the handlebar of U-shaped is installed on outside vibrationproof The front side of shell 6.In the two ends mounting knob of the handlebar of U-shaped.It is configured to make what brush cutter 1 worked around handle The control members such as accelerator lever, switch.

Fig. 2 is the explanatory diagram of the use state of the brush cutter 1 of Fig. 1.Operator M is together illustrated with brush cutter 1 in Fig. 2.

Hanger 9 is installed in the periphery of the vibrationproof shell 6 of brush cutter 1.Hanger 9 links with utensil 10 is hung.Operator M passes through Install and hang utensil 10, brush cutter 1 can be hung piggyback.

In the case where 8 operation of cutter is implemented, operator M hangs brush cutter 1 piggyback, while using two holdings Hold handle 7.Also, handle 7 is kept in the way of states of the operator M by cutter 8 in slightly floating from ground, will cut Filling machine 1 for example swings while advancing.Thereby, it is possible to gather in the epigeal grass in the front of operator M.

Fig. 3 is the longitudinal section (left and right directions) of the engine pack 4 of Fig. 1.Hereinafter, using upper bottom left on the basis of Fig. 3 Before and after the right side.

The engine pack 4 of Fig. 3 has such as air filter 21, carburetor 22, insulator 23, fuel tank 24, starts Owner's body 25, acoustic filter 26, separator 27 and cover the cover component 28 of these components.

Engine main body 25 includes fuel tank 31, the crankcase 32 being configured on fuel tank 31, is configured on crankcase 32 Cylinder portion 33 and the cylinder cap 34 being configured on cylinder portion 33.

Be formed with engine main body 25 for example move up and down for piston 35 cylinder chamber 36, can be rotatably for bent axle 37 The crankshaft room 38 of configuration, make air mixture combustion combustor 39, for configuration driven inlet valve 40 and row The rocker arm chamber 42 of the cam of valve 41 etc..

Also, cylinder chamber 36 is formed at cylinder portion 33.Crankshaft room 38 is formed by installing crankcase 32 under cylinder portion 33 's.Combustor 39 is to install cylinder cap 34 by the upside in cylinder portion 33 and formed.Cylinder chamber 36 and combustor 39 are by 35 points of piston Separate.38 shape all-in-one-piece inner space 43 of cylinder chamber 36 and crankshaft room.Rocker arm chamber 42 is formed at cylinder cap in the upside of combustor 39 34。

Fuel tank 24 is used for gasoline, the fuel such as ethanol that storage can be burnt in engine main body 25.

Air filter 21 removes dust etc. from extraneous air and enters the gas after removal dust etc..

Carburetor 22 has the Venturi tube for making fuel gasification, makes fuel gasification into air, generate combustion in Venturi tube The gaseous mixture of material and air.The Venturi tube of carburetor 22 is connected with the air inlet 44 of engine main body 25 via insulator 23.

Air filter 21 and carburetor 22 are installed on the cylinder portion of engine main body 25 by adiabatic insulator 23 33 left side.Fuel tank 24 is installed on the downside of air filter 21, carburetor 22 and insulator 23.Carburetor 22 and fuel tank 24 are connected from the fuel feed pipe (not shown) for fuel is supplied from fuel tank 24 to carburetor 22.In addition, carburetor 22 Can be connected with the pipe of the pulse paths (not shown) for the fuel supplied from fuel tank 24 is sprayed to Venturi tube. The cylinder chamber 36 of the other end of the pipe of pulse paths and engine main body 25, crankshaft room 38 or air inlet 44 link.

Thus, in engine main body 25, due to the piston 35 in the state of inlet valve 40 and the closing of exhaust valve 41 is opened Negative pressure when moving from top to bottom, can by the gaseous mixture of air and fuel from carburetor 22 via insulator 23 and air inlet Mouth 44 is supplied to the combustor 39 of engine main body 25.

Acoustic filter 26 is installed on the right side in the cylinder portion 33 of engine main body 25.The aerofluxuss of acoustic filter 26 and engine main body 25 Mouth 45 links.Gaseous mixture after the burning of 26 pairs of high temperature discharged from engine main body 25 of acoustic filter is diluted and cools down, Outwards discharge as aerofluxuss.

So, in the engine pack 4 of brush cutter 1, air filter 21, carburetor 22, insulator 23 and noise elimination Device 26 is installed on the left and right in the cylinder portion 33 of engine main body 25.

Fig. 4 is the explanatory diagram of the oil circulating system 50 of the engine main body 25 of Fig. 3.

In the diagram, as making oil circulation space, it is illustrated that oil stock room 51, be made up of crankshaft room 38 and cylinder chamber 36 Inner space 43, cam chamber 52 and rocker arm chamber 42.In addition, illustrating air filter 21 and separator 27 in the diagram.

Internally in space 43, as movable parts, for example, it is configured with bent axle 37, counterweight 46, connecting rod 47, piston 35。

In cam chamber 52, as movable parts, for example, it is configured with gear 48, cam for rotating together with bent axle 37 etc..

In rocker arm chamber 42, as movable parts, for example, it is configured with inlet valve 40, exhaust valve 41, push rod etc..Push rod and cam Rotation correspondingly inlet valve 40 and exhaust valve 41 are depressed.

Oil stock room 51 is formed at the downside of crankcase 32.Receive in oil stock room 51 for these engine main bodies The oil that 25 movable parts are lubricated.Oil in oil stock room 51 including the inner space 43 of crankshaft room 38, cam chamber 52, Circulate in rocker arm chamber 42, the movable parts for being configured at these spaces of engine main body 25 are lubricated.

Oil stock room 51 is linked with the cylinder chamber 36 of engine main body 25 using the 1st oil circuit 53.The oil of oil stock room 51 is being sent out Inner space 43 is drawn to from the 1st oil circuit 53 in the presence of the negative pressure of the inner space 43 of motivation main body 25, inner space is flowed into 43 crankshaft room 38.In crankshaft room 38, mist of oil is generated using 46 grade of counterweight of rotation.Further, since oil is internally Dispersing in space 43, can be lubricated to bent axle etc..

The malleation of the mist of oil that internally generates in the crankshaft room 38 in space 43 in the inner space 43 of engine main body 25 Flow into oil stock room 51 via the 1st check valve 54 and the 2nd oil circuit 55 under effect.3rd oil circuit 56 is by oil stock room 51 and convex Engineer room 52 is linked up, therefore, mist of oil is supplied to cam chamber 52, and the movable parts in cam chamber 52 are lubricated.

Cam chamber 52 is linked with rocker arm chamber 42 using the 4th oil circuit 57.The mist of oil of cam chamber is supplied to rocker arm chamber, to rocking arm Movable parts in room 42 are lubricated.Rocker arm chamber 42 is via the 5th oil circuit 58, separator 27, the 6th oil circuit 59 and the 1st oil circuit 53 are linked with the cylinder chamber 36 of inner space 43.

So, in the engine pack 4 of brush cutter 1, make the oil of oil stock room 51 empty to the inside of engine main body 25 Between 43 (crankshaft room 38), cam chamber 52 and rocker arm chamber 2 circulate, rightly the movable parts of engine main body 25 can be carried out Lubrication.

Link with crankshaft room 38 and make the oil circulation and right of crankshaft room 38 cam chamber 52 and rocker arm chamber 42 is so made In the case that cam chamber 52 and rocker arm chamber 42 are lubricated, such as a part for the gaseous mixture in combustor 39 is used as so-called Gas blowby and via the gap around piston 35, from combustor 39, internally space 43 (crankshaft room) spills, with the oil in bent axle room Mist mixes.The fluid-mixing of the mist of oil and gas blowby is circulated to cam chamber 2 and rocker arm chamber 42.Especially, rocker arm chamber 42 is located at and sends out The upper part of motivation main body 25, therefore, fluid-mixing easily accumulates.Fluid-mixing contains unburned fuel and oil, therefore, if Burning is passed through in intake channel indoor, then cause to produce white cigarette.In addition, causing the consumption of oil to increase.And, combustion Material composition and oil mixing, therefore, cause to promote the deterioration of oil component.

Therefore, in the engine pack 4 of conventional brush cutter, it is provided with oily using the 5th in the bottom of air filter 21 Road 58 is linked with rocker arm chamber 42 and using the 6th oil circuit 59 and the separator 27 of the link of cylinder chamber 36 of engine main body 25, is utilized The separator 27 makes fluid-mixing gas-liquid separation.The gas componant (propellant composition) isolated can be made via gas return path 60 return the air filter 21 integrated with separator 27, can be further from air filter 21 again to engine main body 25 combustor 39 is supplied, and which can be made to burn in engine main body 25.The liquid component (oil component) isolated can be made Via 59 return engine main body 25 of the 6th oil circuit.

However, in the case where being so integrally provided separator 27 and air filter 21, in order to will be with air filter The rocker arm chamber 42 of the separator 27 and engine main body 25 of 21 one of clear device links, and needs to will act as the mixed flow of the 5th oil circuit 58 The pipe of body is winding to air filter 21 from the top of engine main body 25.

In addition, in order to the cylinder chamber 36 of separator 27 and engine main body 25 with 21 one of air filter is linked, needing The pipe of oil return of the 6th oil circuit 59 be will act as from the winding cylinder portion 33 to engine main body 25 of air filter 21.

As a result, in expectation miniaturization, part in the engine pack 4 of the brush cutter 1 of closely layout, is needed to draw Around the pipe and the pipe of oil return of fluid-mixing.In addition, in the engine pack 4 of brush cutter 1, carburetor 22, air filter Clear device 21 etc. is installed on engine main body 25, therefore, the pipe of fluid-mixing is from the top of engine main body 25 in carburetor 22 Around by and link to the separator 27 of air filter 21.

In addition, as described above, the carburetor 22 used in the engine pack 4 of brush cutter 1 needs to supply with fuel Multiple pipes such as pipe, fuel return pipe, the pipe of pulse paths link.

As a result, the pipe for being linked to multiple pipes and fluid-mixing of carburetor 22 is overlapped around carburetor 22, this A little pipes are rubbed around carburetor 22 each other, and the installation exercise of pipe spends labour and time, causes the assembling of engine pack 4 Workability deteriorates.

So, in the engine pack 4 used by brush cutter 1 and brush cutter 1, it is desirable to which pipe is each other in the week of carburetor 22 Enclose and be difficult to overlap the assembling operation to improve engine pack 4.

Therefore, in the present embodiment, separator 27 is made to be separately formed relative to air filter 21, with air-filtering Device 21 is separated.In addition, the separator 27 separated with air filter 21 is integratedly installed on into insulator 23, than carburetor 22 Arrange near 25 ground of engine main body.Thereby, it is possible to make the pipe of the fluid-mixing of gas blowby and mist of oil not in the week of carburetor 22 Enclose and pass through.Hereinafter, it is described in detail.

Fig. 5 is the left view of configuration, Fig. 3 the engine main body 25 of the separator 27 for representing Fig. 4.

Fig. 6 is the in-built of separator 27, the partial cutaway part left view of the engine main body 25 of Fig. 3 for representing Fig. 5 Figure.

Fig. 7 is the in-built of separator 27, the partial cutaway part backsight of the engine main body 25 of Fig. 3 for representing Fig. 5 Figure.

As shown in Fig. 5～Fig. 7, separator 27 is formed at the left side of engine main body 25.Separator 27 has：Separation chamber 71, which is attracted to fluid-mixing and is carried out gas-liquid separation；Metal net 72, which is accommodated in separation chamber 71 and is mixed stream Liquid component moistening in body；Inner nozzle 73, its be protrudedly formed into separation chamber 71 and by the gas componant isolated from point Discharge from room 71.In addition, the discharge path 74 that diagram is connected with the bottom of separation chamber 71 in these figures, check valve 75.

Fig. 8 is the explanatory diagram of the bottom surface (composition surface S33) for arranging separator 27 for representing cylinder portion 33.Cylinder portion 33 is in figure It is overlap with crankcase 32 at 8 bottom surface.

In cylinder portion 33, become separator hole 81, the 1st recess 82, second recesses 83 and the return of a part for separation chamber 71 Hole 84 is formed at the left side in the hole 85 of crankshaft room 38.

Separator hole 81 has substantially cubical hole shape.Separator hole 81 is formed at the left side in the hole 85 of crankshaft room 38 The position separated with the hole of side.The position in left side in crankshaft room 38 of the separator hole 81 on the composition surface S33 in cylinder portion 33 Put the opening to form substantially tetragon.

1st recess 82 and second recesses 83 are formed at the shallower pit of the composition surface S33 in cylinder portion 33.1st recess 82 And second recesses 83 are positioned at the right side between separator hole 81 and the hole 85 of crankshaft room 38 and 81 continuous landform of separator hole Into.1st recess 82 is continuous with separator hole 81 in the front side of engine main body 25.Second recesses 83 are after engine main body 25 Side is continuous with separator hole 81.1st recess 82 and second recesses 83 are formed in from separator hole 81 towards engine main body 25 The continuous shallower recess in side.

Return aperture 84 extends along above-below direction as shown in Figure 7, is connected with the 1st oil circuit 53 in cylinder portion 33.Additionally, Return aperture 84 can also with for the pressure in cylinder chamber 36 is connected to the pulse paths that carburetor 22 is transmitted.Return aperture 84 is in cylinder The position between the 1st recess 82 and second recesses 83 on the composition surface S33 in portion 33 forms opening.

Fig. 9 is the explanatory diagram of the upper surface (composition surface S32) for arranging separator 27 for representing crankcase 32.Crankcase 32 is overlap with cylinder portion 33 at the upper surface of Fig. 8.

In crankcase 32, the 1st groove 91 and the 2nd groove 92 for becoming the bottom of separation chamber 71 is formed at crankshaft room 38 The left side in hole 93.

1st groove 91 is formed at the shallower pit of the substantially tetragon of the composition surface S32 of crankcase 32.1st groove 91 exists The position separated with crankshaft room 38 in the left side of crankshaft room 38 be formed at the separator hole 81 in cylinder portion 33, the 1st recess 82 and The corresponding scope of second recesses 83.

2nd groove 92 is formed at the shallower pit of the substantially tetragon in the 1st groove 91.2nd groove 92 is formed at recessed with the 1st Corresponding scope between portion 82 and second recesses 83.The part of the 2nd groove 92 is formed with than being formed with the part depth of the 1st groove 91.

By forming the 2nd groove 92, the 1st groove 91 has the bottom surface of substantially Japanese U-shaped shape.In substantially Japanese U-shaped shape The bottom surface of the 1st groove 91 be formed with multiple ribs 94.Rib 94 extends along left and right directions.In fig .9, six roots of sensation rib 94 is along front and back Formed to arrangement.

The bottom surface in the cylinder portion 33 of Fig. 8 is Chong Die with the upper surface of the crankcase 32 of Fig. 9.Thus, 32 quilt of cylinder portion 33 and crankcase Assembling.That is, engine main body 25 is assembled.

In cylinder portion 33 and composition surface S33, S32 of crankcase 32, divide in the left side of crankshaft room 38 and be formed with Fig. 5～Fig. 7 Shown separation chamber 71.Separation chamber 71 is formed as substantially standing for lengthwise using the left part in separator hole 81 and the 1st groove 91 The empty shape of cube.

The discharge path 74 of the liquid component connected with the bottom of separation chamber 71 is formed with the right side of separation chamber 71.Discharge Path 74 is the path formed by the right part of the 1st groove 91, the 2nd groove 92, the 1st recess 82 and second recesses 83.

Discharge path 74 is connected with return aperture 84.Return aperture 84 is connected with discharge path 74 in the position relative with the 2nd groove 92 It is logical.

The composition surface S33 as shown in Figure 7 in engine main body 25 from cylinder portion 33 and crankcase 32 of return aperture 84, S32 is upwardly extended.The upper end of return aperture 84 is connected with the 1st oil circuit 53 in cylinder portion 33.

Thus, form the path of the liquid component of the cylinder chamber 36 that engine main body 25 is communicated to from separation chamber 71.Formation makes Liquid component after gas-liquid separation returns the 6th oil circuit 59 of cylinder chamber 36 from separation chamber 71 in the diagram.Additionally, matching somebody with somebody in return aperture 84 Check valve 75 is equipped with, so that liquid component does not return to separation chamber 71.

6th oil circuit 59 therein is using discharge path 74 from separation chamber 71 towards the inner side of engine main body 25.Thus, nothing By whether composition surface S33, the S32 in cylinder portion 33 and crankcase 32 is formed with separation chamber 71, can prevent in separation chamber 71 The liquid component that gas-liquid separation goes out is from separation chamber 71 to the External leakage of engine main body 25.

In addition, multiple ribs 94 are formed extended at both sides along left and right directions from the bottom surface of separation chamber 71 to discharge path 74.Thus, Liquid component flows towards the 2nd groove 92 from separation chamber 71 readily along multiple ribs 94.The liquid isolated in separation chamber 71 into Divide and successfully discharge from separation chamber 71, accumulate in the 2nd groove 92 under return aperture 84.

As shown in Fig. 5～Fig. 7, suction hole 76 is opened in the middle position of the separation chamber 71 of the substantially cubic shaped of lengthwise Mouthful.Suction hole 76 is linked with the pipe for being linked to rocker arm chamber 42, gas blowby and mist of oil fluid-mixing.Thus, formed in Fig. 4 The 5th oil circuit 58 of fluid-mixing is introduced from rocker arm chamber 42 to separation chamber 71.Without the need for the pipe as the 6th oil circuit 59 of Fig. 4.

Net 72 can also be into the spherical net of steel wire for example by a metal ball of string for wire.As shown in fig. 7, net 72 is configured In separation chamber 71.In addition, net 72 is shaped generally as the profile of ring-type, in the central portion with through hole 77.Thus, by net In the state of 72 are put in separation chamber 71, the space segment of not net 72 is formed in the front portion of suction hole 76.From suction hole The fluid-mixing of 76 suction separation chambers 71 is easily accessible in separation chamber 71.Even if the moistening due to separated components such as oil of net 72, Be able to ensure that the space for fluid-mixing being introduced before suction hole 76.

Inner nozzle 73 is located at the top of the separation chamber 71 of the substantially cubic shaped of lengthwise in the position more upper than net 72. Inner nozzle 73 is protrusively provided into separation chamber 71 in the position more upper than suction hole 76.Inner nozzle 73 be linked to air filter The pipe of clear device 21 links.Thus, the gas for making the gas componant returning air cleaner 21 after gas-liquid separation formed in Fig. 4 is returned Loop footpath 60.In addition, by making inner nozzle 73 to prominent in separation chamber 71, being obtained in that the top from suction hole 76 to inner nozzle 73 The creepage distance at end.The position more upper than suction hole 76 is configured at inner nozzle 73 to interact, the liquid such as oil isolated Composition is difficult to into inner nozzle 73.

In such separator 27, moved and cylinder chamber 36 and crankshaft room in cylinder chamber 36 from bottom to top in such as cylinder In the case that 38 become negative pressure, negative pressure acts on separation chamber 71 via the 1st oil circuit 53, return aperture 84 and discharge path 74.It is logical Guo Shi separation chambers 71 become negative pressure, lodge in the fluid-mixing of gas blowby and mist of oil in rocker arm chamber 42 via suction hole 76 to separation Room 71 attracts.

The fluid-mixing for being attracted to the gas blowby and mist of oil of separation chamber 71 is contacted with the net 72 in separation chamber 71, wet web 72. Thus, gas componant (propellant composition) and liquid component (oil component) in fluid-mixing is separated.

Then, if gas componant of the suction function in separation chamber 71, separation chamber 71 is via by inner nozzle 73 and pipe structure Into 60 returning air cleaner 21 of gas return path.The gas componant isolated is introduced electromotor from air filter 21 The combustor 39 of main body 25 is simultaneously burned.

In addition, when suction function is in separation chamber 71, the liquid component isolated from separation chamber 71 via discharge path 74, Return aperture 84 and the 1st oil circuit 53 flow into cylinder chamber 36.

So, the gas componant in fluid-mixing is separated by separator 27 with liquid component, can make the gas isolated The inner space 43 of composition and liquid component difference returning air cleaner 21 or engine main body 25.

Additionally, the 1st oil circuit 53 is connected with cylinder chamber 36.Thus, decline in piston 35 and cylinder chamber 36 and crankshaft room 38 become In the case of malleation, the 1st oil circuit 53 is blocked by cylinder.Higher malleation does not act on separation chamber 71.As a result, regardless of whether Separation chamber 71 is formed with composition surface S33, S32 of crankcase 32 in cylinder portion 33, be all difficult to the gas-liquid separation in separation chamber 71 Liquid component from separation chamber 71 towards engine main body 25 outside ooze out.

In the present embodiment, as shown in figure 5, can by the pipe of fluid-mixing than insulator 23 near engine main body 25 sides ground is winding.Thus, it is possible in the way of not Chong Die with the pipe for being linked to carburetor 22 winding fluid-mixing pipe.

In addition, in the present embodiment, as shown in figure 5, can be by the pipe of gas componant with the downside of carburetor 22 It is winding by way of.Thus, it is possible in the way of not Chong Die with the pipe for being linked to carburetor 22 winding gas componant pipe.

As described above, in the present embodiment, separator 27 is separately formed relative to air filter 21, and is started Owner's body 25 is integrally formed.Thus, even if by the pipe for the fluid-mixing of gas blowby and oil is supplied to separator 27 from for example The rocker arm chamber 42 on crankshaft room 38, the crankshaft room 38 located at the top of engine main body 25 is winding to separator 27, also can The pipe is enough made not pass through around carburetor 22.Even if as a result, fuel is supplied for example from fuel tank 24 to carburetor 22 Pipe, the unnecessary fuel of carburetor 22 is made to return the pipe of fuel tank 24, the pressure for making fuel gasification is supplied to carburetor 22 Multiple pipes such as the pipe of pulse paths are linked with carburetor 22, and the pipe for also becoming fluid-mixing is linked to carburetor 22 with these Pipe do not overlap around the carburetor 22.Pipe is difficult to around carburetor 22 overlap and rub each other, therefore, the installation of pipe Operation becomes easy, and the assembling operation of engine pack 4 is improved.

In addition, the liquid component that gas-liquid separation goes out in separation chamber 71 is via the oil circulation system of return in engine main body 25 System.Thus, without the need for the pipe of the return path.Thus, the installation exercise of pipe also becomes easy, the assembling operation of engine pack 4 Property is improved.

In addition, separator 27 is configured at the boundary portion of crankcase 32, therefore, in the situation of the liquid oil leakage isolated Under, liquid oil is also flowed in crankshaft room 38, therefore, it is possible to prevent External leakage of the oil to engine main body 25.

In addition, by the use of as the cylinder portion 33 of usual divided two parts and crankcase 32 in engine maintenance come shape Into separator 27, it is possible to increase maintainability.

In addition, in the present embodiment, using the composition surface of the composition surface S33 and crankcase 32 for being formed at cylinder portion 33 1st recess 82 of at least one of S32, is overlapped by making cylinder portion 33 and crankcase 32, is formed and divide in engine main body 25 From the separation chamber 71 of device 27.Thus, it is possible to the cylinder portion 33 being directed to before assembling or crankcase 32 are readily formed separate for being formed The construction of device 27.And, after assembling, the separation chamber 71 of separator 27 is integratedly located in engine main body 25, therefore, it is possible to Separator 27 is configured at the vicinity of the center of gravity of engine pack 4, the weight balancing of engine pack 4 can be improved.

In addition, in the present embodiment, separator 27 is separately formed relative to air filter 21, therefore, it is possible to make The compact dimensions of air filter 21, can suppress stretching out for air filter 21, and the size of engine pack 4 can be made tight Gathering.In addition, air filter 21 is changed even from use environment, service life, without together with air filter 21 Change separator 27.

In addition, separator 27 in engine main body 25 located at the position than multiple air cold sinks 49 on the lower, Therefore, air cooling performance of multiple air cold sinks 49 to engine main body 25 will not be damaged.In addition, by separating Device 27 is configured at the position than multiple air cold sinks 49 on the lower, no matter separator 27 whether with engine main body 25 1 Body ground is formed, and heat is also difficult to separator 27 transmit, and can suppress temperature of the fluid-mixing in separator 27, lifted oil into The viscosity divided, improves the gas-liquid separation performance of separator 27.

In contrast, it is cold that separator 27 is installed on for example multiple air on the top of engine main body 25 for example in hypothesis But, in the case of the side of fin 49, temperature of the fluid-mixing in separator 27 is difficult to decline.

In addition, in the present embodiment, the separation chamber 71 of separator 27 is via the composition surface S33 and song for being formed at cylinder portion 33 The discharge path 74 of the composition surface S32 of axle box 32 and from 74 upwardly extending discharge path 74 of discharge path with by crankshaft room 38 with And the cylinder chamber 36 in the inner space 43 of the composition of cylinder chamber 36 is connected.The separation chamber 71 of separator 27 is not directly connected with crankshaft room 38 Connect.It is in the engine device of the brush cutter 1 used with various postures, oil circulation etc. in order to carry out, expect to tie up crankshaft room 38 Hold in for example predetermined negative pressure state, extraneous air can be difficult to the crankshaft room 38 that the negative pressure is flowed into via separator 27.For example The pressure drop when the rising of piston 35 of crankshaft room 38, but the piston 35 for rising blocking can be utilized at this moment to communicate with cylinder chamber 36 Oily path.Higher negative pressure can be obtained in crankshaft room 38.Also, following for the oil being circulated using the negative pressure will not be damaged Ring performance, can make the inner space 43 of liquid component return engine main body 25 isolated in separator 27.

[the 2nd embodiment]

The brush cutter 1 of the 2nd embodiment of the present utility model is being provided with for the work into the separation chamber 71 of separator 27 This point of industry hole 101 is different from the brush cutter 1 of the 1st embodiment.In the 2nd embodiment, for the 1st embodiment identical Element marks identical title and reference, and the description thereof will be omitted.Hereinafter, illustrated centered on difference.

Figure 10 is in-built, the engine main body for representing the separator 27 in the 2nd embodiment of the present utility model 25 partial cutaway fragmentary rear elevation view.

In the engine main body 25 of Figure 10, operation hole 101 is formed with crankcase 32.Operation hole 101 is formed at from the 1st Groove 91 is in the range of the 2nd groove 92.Operation hole 101 is down formed from the composition surface S32 contacted with cylinder portion 33.Operation hole 101 The separation chamber 71 of separator 27 is connected with oil stock room 51.

Plug member 102 can releasably insert operation hole 101.In fig. 10 it is shown that plug member 102 is from operation hole 101 unload after state.

By plug member 102 is inserted operation hole 101, operation hole 101 is blocked.The separation chamber of separator 27 can be made 71 and oil stock room 51 separate.In addition, the upper surface of plug member 102 is formed as the 1st groove 91 with the 1st embodiment and The same shape of 2 grooves 92.

As described above, in the present embodiment, in this utility model, oily storage will be formed with the outside of crankshaft room 38 The fuel tank 31 for hiding room 51 is unloaded from crankcase 32, and by plug member 102 is unloaded from operation hole 101, operator M can be entered It is formed at the separation chamber 71 in cylinder portion 33 and the separator 27 of composition surface S33, S32 of crankcase 32.Not by cylinder portion 33 and crankcase 32 decompose, it becomes possible to implement the maintenance of separator 27.For example the rubbish for lodging in the separation chamber 71 of separator 27 can be removed, Or the net 72 to being configured at the separation chamber 71 of separator 27 is changed or is cleaned.

For being formed in the cylinder portion 33 of separator 27 and composition surface S33, S32 of crankcase 32, in order to by 37 energy of bent axle Enough rotatably sandwiched therebetween, fixations firmly with each other, and high-precision alignment adjustment is needed in assembling, but not by the cylinder portion 33 Decompose with crankcase 32, it becomes possible to easily safeguard the separator 27 for being formed at the composition surface S33, S32.

In addition, operation hole 101 is not the outer surface opening in engine main body 25, but in the oil storage coated by fuel tank 31 Hide room 51 to be open.Thus, even if the liquid component isolated in the separation chamber 71 of separator 27 is spilt from operation hole 101, leakage Liquid component out will not also be exuded to the outside of engine main body 25, but fall to oil stock room 51.

In addition, in the present embodiment, operation hole 101 be formed on the composition surface S32 of crankcase 32 with the 1st groove 91 with And the 2nd corresponding scope of groove 92.I.e., operation hole 101 be formed at from the separation chamber 71 with separator 27 position that communicates to In the range of the relative position of oily path.Thus, can not only easily safeguard separator 27, it is also possible to easily safeguard and divide The discharge path 74 continued from device 27 and return aperture 84.In order to transmit the pressure of inner space 43 and from separator 27 to bent axle The discharge path 74 and return aperture 84 of room 38 is formed with less sectional area, easily can will get lodged in the stream of the less oil The rubbish on road is removed.

[the 3rd embodiment]

The brush cutter 1 of the 3rd embodiment of the present utility model is in order to block for into the separation chamber 71 of separator 27 Operation hole 101 and use plug member 102 and holding member 103 this put it is different from the brush cutter 1 of the 2nd embodiment. In 3rd embodiment, for identical title and reference is used with the 2nd embodiment identical element, omit Its explanation.Hereinafter, illustrated centered on difference.

Figure 11 is in-built, the engine main body of the separator 27 in the 3rd embodiment for represent present embodiment 25 partial cutaway fragmentary rear elevation view.

In the engine main body 25 of Figure 11, the plug member 102 for being inserted into operation hole 101 is kept component 103 under Suppress.

Holding member 103 is for example fixed on crankcase 32 using screw etc..

As described above, in the present embodiment, plug member 102 can be kept using holding member 103, so that thromboembolism Component 102 forms the composition surface S32 of 32 side of crankcase together with crankcase 32.Thus, it is possible to will be formed in crankcase 32 and cylinder It is unexposed that composition surface S32, the S33 in portion 33 and the separation chamber 71 of separator 27 that connects with operation hole 101 are set to operation hole 101 Desired shape.

In addition, plug member 102 can be using the precision that can be obtained required by the composition surface S32 engaged with crankcase 32 Such as metal material, and holding member 103 can use such as resin material of the degree for keeping plug member 102.Also, it is logical Cross and holding member 103 is set to into such as resin material, can even if oil is remained between operation hole 101 and plug member 102 The gap for passing through, it is also possible to rightly block the gap using holding member 103.

[the 4th embodiment]

The brush cutter 1 of the 4th embodiment of the present utility model is being linked the of rocker arm chamber 42 and separator 27 in the diagram 5 oil circuits 58 and this point of 25 integration of engine main body are different with the brush cutter 1 of the 1st embodiment.It is in the 4th embodiment, right In identical title and reference is used with the 1st embodiment identical element, the description thereof will be omitted.Hereinafter, with not Illustrate centered on same point.

Figure 12 is in-built, the engine main body of the separator 27 in the 4th embodiment for represent present embodiment 25 partial cutaway fragmentary rear elevation view.

Fluid-mixing path 104 is formed with engine main body 25.Fluid-mixing path 104 is shaken from engine main body 25 Arm room 42 extends to the separation chamber 71 of separator 27 along above-below direction.Additionally, the lower end of fluid-mixing path 104 is in upper and lower To central part opening.

As described above, in the present embodiment, the path of fluid-mixing is integrally formed with engine main body 25, because This, without the need for being used for the pipe of the fluid-mixing for linking rocker arm chamber 42 and separator 27 in the diagram relative to engine main body 25 It is provided independently from.The pipe of fluid-mixing can be made to disappear from 22 surrounding of carburetor.

Additionally, here, the feature of the 4th embodiment is applied to the 1st embodiment, it is also possible to be applied to the 2nd embodiment party Formula, the 3rd embodiment or the 5th embodiment described later.

[the 5th embodiment]

The appearance of the separator 27 integrated with engine main body 25 of the brush cutter 1 of the 5th embodiment of the present utility model Gesture is different with the brush cutter 1 of the 1st embodiment.In the 5th embodiment, to making with the 1st embodiment identical element With identical title and reference, the description thereof will be omitted.Hereinafter, illustrated centered on difference.

Figure 13 is configuration, the engine main body 25 of the separator 27 in the 5th embodiment for represent present embodiment Longitudinal section (left and right directions).

Engine main body 25 has fuel tank 31, crankcase 32, cylinder portion 33, cylinder cap 34.Cylinder chamber 36 is formed at cylinder portion 33.Bent axle Room 38 is formed by cylinder portion 33 and crankcase 32.Oil stock room 51 is formed by fuel tank 31 and crankcase 32.

Separator 27 is formed at composition surface S32, S33 of crankcase 32 and cylinder portion 33.In fig. 13, on a left side for crankshaft room 38 Side is formed with the separator 27 with 25 one of engine main body.

Specifically, the separation chamber 71 of separator 27 at the composition surface S33 contacted with crankcase 32 with crankcase 32 1 Body ground is formed.By making cylinder portion 33 overlap with crankcase 32, division forms separation chamber 71.

In addition, being formed with discharge path 74 under separation chamber 71.Bottom surface and bent axle of the discharge path 74 from separation chamber 71 Room 38 links.

As described above, in the present embodiment, separator 27 be formed at crankcase 32 and cylinder portion 33 composition surface S32, S33, therefore, separator 27 is integrally formed with engine main body 25.Like this, only by assembled engines main body 25, Separator 27 can be formed simultaneously just, therefore, assembling operation also becomes easy.

The pipe for linking the fluid-mixing of the rocker arm chamber 42 and separator 27 of engine main body 25 can be from carburetor 22 Surrounding is left to 25 side of engine main body, is passed through around insulator 23.As a result, in the week of carburetor 22 Enclose, the Guan Buyu of fluid-mixing is linked to the various pipes overlaps of carburetor 22.The installation exercise of pipe becomes easy, engine pack 4 assembling operation is improved.

In addition, separator 27 in engine main body 25 located at the position than multiple air cold sinks 49 on the lower, Therefore, air cooling performance of multiple air cold sinks 49 to engine main body 25 will not be damaged.In addition, by separating Device 27 is configured at the position than multiple air cold sinks 49 on the lower, no matter separator 27 whether with engine main body 25 1 Body ground is formed, and heat is all difficult to separator 27 transmit, and can suppress the temperature of the fluid-mixing in separator 27, lifted oil into The viscosity divided, improves the gas-liquid separation performance in separator 27.

In contrast, it is cold that separator 27 is for example installed on multiple air on the top of engine main body 25 for example in hypothesis But, in the case of the side of fin 49, the temperature of the fluid-mixing in separator 27 is difficult to decline.

In addition, in the present embodiment, separator 27 is integrally formed with engine main body 25, it is therefore not necessary to link point From device 27 and the pipe of engine main body 25.And, the pressure oscillation in the cylinder chamber 36 of engine main body 25 or crankshaft room 38 is direct Separator 27 is acted on, therefore, it is possible to make the pressure loss caused by flexible pipe etc. disappear, the gas-liquid point of separator 27 is improved From performance.

More than embodiment be example preferred embodiment of the present utility model, but this utility model is not limited In this, various modifications or change can be carried out in the range of the purport without departing from utility model.

For example, in the above-described embodiment, net 72 is configured with the separation chamber 71 of separator 27.Additionally, for example, also may be used Inner housing is configured in separation chamber 71, configure net 72 in the inner shell body.Alternatively, it is also possible to be provided for starting in inner housing Owner's body 25 is guided in the case of being in inclined posture the various liquid of discharge path 74 by the liquid component in separation chamber 71 Path.

In the above-described embodiment, only crankcase 32 is overlap with cylinder portion 33, therefore, on the composition surface, S33, S32 are formed with Insulator 23.

Additionally, for example, in the case where cylinder portion 33 and fuel tank 31 overlap, it is also possible to which on the composition surface, S33, S32 are formed absolutely Hot body 23.

In the above-described embodiment, the gas componant that gas-liquid separation is gone out by separator 27 to air filter 21 supply it is same When, make the inner space 43 of the liquid component return engine main body 25 that gas-liquid separation goes out.

Additionally, for example, the oil storage of the liquid component return engine main body 25 that gas-liquid separation can also be gone out by separator 27 Hide room 51.And, in addition it is also possible to return to such as room of part of lubrication of 42 grade of rocker arm chamber configuration oil in need etc..Pass through Make the liquid component that gas-liquid separation goes out return oil circulating system 50, oil can be recycled, the consumption of oil can be suppressed.

Above-mentioned embodiment is the example that this utility model is applied to brush cutter 1.

Also for example there is stock saw, stock hedgeclipper, coffee harvester in working rig.This utility model can be used in The situation of engine pack 4 used in these working rigs.Additionally, working rig can also be for the fixed of electromotor etc. Working rig.

In the above-described embodiment, show first be cylinder portion, second be crankcase example, it is also possible to first Be cylinder portion, second be fuel tank.Alternatively, it is also possible to first be crankcase, second be fuel tank.

Additionally, the cylinder portion of the application forms a part of the top half of (cylinder chamber) and crankshaft room around cylinder, but The part and the part of the top half for forming crankshaft room covered around cylinder can also be independent part.In this case, First can also be formed as to cover the part around cylinder, the part that Part II is the top half to form crankshaft room.

In the above-described embodiment, the example that gauze filter is configured with separator is shown, as filter, energy It is enough by path be set to labyrinth-like, the filter configuration for making liquid separating of oil by the contact between the gas containing mist of oil and wall, Separating of oil filter configuration of liquid etc. is made to carry out various changes using centrifugal force.

In the above-described embodiment, show that net is ring-like example, the shape of net can carry out various changes, it is also possible to Without centre bore.

Claims (9)

1. a kind of engine device of working rig, it is characterised in which includes：

Engine main body, which has first and second for overlapping each other, in first for being superimposed together and second Be internally formed：For the cylinder chamber that piston is moved up and down；Crankshaft room, the bent axle rotated with the moving up and down for piston match somebody with somebody It is placed in the crankshaft room；And oil is at least made in the oil circulating system of the bent axle indoor circulation；

Air filter, extraneous air enter the engine main body via the air filter；

Carburetor, which generates the gaseous mixture of the extraneous air and fuel for being entered and supplies to the engine main body；With And

Separator, which is separately formed relative to the air filter, is altered to entering into the crankshaft room from the cylinder chamber The fluid-mixing that gas and the oil are mixed is attracted, and carries out gas-liquid separation to the fluid-mixing,

The separator is with being formed in the engine main body by overlapping described first and described second Separation chamber,

The gas componant that the gas-liquid separation in the separation chamber is gone out by the engine device of the working rig is to the air-filtering Device is supplied, and the liquid component that the gas-liquid separation in the separation chamber is gone out is described oil circulation via returning in the engine main body System.

2. the engine device of working rig according to claim 1, it is characterised in that

The recess at least one of the composition surface using the composition surface for being formed at described first and described second carrys out shape Into the separation chamber.

3. the engine device of working rig according to claim 2, it is characterised in that

Described first is cylinder portion, and described second is crankcase.

4. the engine device of working rig according to claim 3, it is characterised in that

The engine main body has：

Form the fuel tank of oil stock room；

The operation hole of the oil stock room is communicated to from the separation chamber；And

The operation hole is installed in the way of it can dismantle relative to the operation hole and the thromboembolism structure in the operation hole is blocked Part,

The separation chamber is formed using the recess and the plug member.

5. the engine device of working rig according to claim 4, it is characterised in that

Composition surface opening of the operation hole in the crankcase,

The plug member is installed on the crankcase in the way of it can dismantle relative to the crankcase,

Institute is kept in the way of a part of the engine device of the working rig with the composition surface to constitute the crankcase side State the holding member of plug member.

6. the engine device of working rig according to claim 5, it is characterised in that

The engine device of the working rig has the oily path for being formed at the cylinder portion and leading to the cylinder chamber,

The liquid component that gas-liquid separation goes out in the separation chamber is made from the inside being made up of the crankshaft room and the cylinder chamber The cylinder chamber in space returns the oil circulating system.

7. the engine device of working rig according to claim 6, it is characterised in that

The operation hole on the composition surface of the crankcase from the position relative with the oily path to the separation chamber Scope inner opening,

The part on the composition surface that the plug member constitutes the crankcase by being installed on the operation hole.

8. the engine device of the working rig according to any one of claim 1～7, it is characterised in that

The engine main body has：

Rocker arm chamber, which is formed on the cylinder chamber, is a part for the oil circulating system, for described oil circulation；And

The path of the fluid-mixing, which is communicated to the separation chamber from the rocker arm chamber,

The separator attracts to the fluid-mixing from the rocker arm chamber via the path of the fluid-mixing.

9. a kind of working rig, its have lengthwise action bars, be installed on the action bars one end instrument and be installed on institute State the engine pack of the other end of action bars, it is characterised in that

The engine pack includes：

Engine main body, which has first and second for overlapping each other, in first for being superimposed together and second Be internally formed：For the cylinder chamber that piston is moved up and down；Crankshaft room, the bent axle rotated with the moving up and down for piston match somebody with somebody It is placed in the crankshaft room；And oil is at least made in the oil circulating system of the bent axle indoor circulation,

Air filter, extraneous air enter the engine main body via the air filter；

Carburetor, which generates the gaseous mixture of the extraneous air and fuel for being entered and supplies to the engine main body；With And

Separator, which is separately formed relative to the air filter, is altered to entering into the crankshaft room from the cylinder chamber The fluid-mixing that gas and the oil are mixed is attracted, and carries out gas-liquid separation to the fluid-mixing,

The separator is with being formed in the engine main body by overlapping described first and described second Separation chamber,

The gas componant that the gas-liquid separation in the separation chamber is gone out is supplied to the air filter, is made in the separation chamber The liquid component that gas-liquid separation goes out is via returning the oil circulating system in the engine main body.