CN105863772A - Lubricating device for engine - Google Patents

Lubricating device for engine Download PDF

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Publication number
CN105863772A
CN105863772A CN201510973723.4A CN201510973723A CN105863772A CN 105863772 A CN105863772 A CN 105863772A CN 201510973723 A CN201510973723 A CN 201510973723A CN 105863772 A CN105863772 A CN 105863772A
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CN
China
Prior art keywords
opening
crankshaft room
accumulator
oil
engine
Prior art date
Application number
CN201510973723.4A
Other languages
Chinese (zh)
Inventor
沓名知之
杉山博纪
Original Assignee
株式会社牧田
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2015-020886 priority Critical
Priority to JP2015020886A priority patent/JP6357119B2/en
Application filed by 株式会社牧田 filed Critical 株式会社牧田
Publication of CN105863772A publication Critical patent/CN105863772A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/04Pressure lubrication using pressure in working cylinder or crankcase to operate lubricant feeding devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10Lubrication of valve gear or auxiliaries

Abstract

A lubricating device for an engine is provided. A first opening part penetrates a first partition wall separating a crank chamber and an oil sump chamber. A second opening part penetrates a second partition wall separating the crank chamber and a valve drive chamber. In a lubricating device for an engine, when the pressure in the crank chamber is positive, gas in the crank chamber is injected into the oil sump chamber through the first opening part and impacts oil, thus generating mist oil in the oil sump chamber, and mist oil in the crank chamber passes through the second opening part and is supplied to the valve drive chamber, whereas when the pressure in the crank chamber is negative, mist oil in the oil sump chamber passes through the first opening part and is supplied to the crank chamber.

Description

The lubricating arrangement of engine

Technical field

The present invention relates to the lubricating arrangement of a kind of engine that can be equipped on portable apparatus for work etc..

Background technology

The engine being equipped on the portable apparatus for work such as brush cutter can include the fortune up and down by piston Dynamic and the crankshaft room that makes the pressure of inside change and be configured at the lower section of crankshaft room and for storing profit The accumulator of sliding oil.This engine is by disclosed in patent document 1.

In patent document 1, crankshaft room is connected via opening portion with accumulator, generates in accumulator Mist of oil via described opening portion to crankshaft room supply.

Prior art literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2004-293448 publication

Summary of the invention

The problem that invention is to be solved

But, in patent document 1, connection crankshaft room compares with the aperture area of the opening portion of accumulator Greatly.Therefore, when in crankshaft room being malleation, the gas in crankshaft room via described opening portion to accumulator Interior interior on a large scale supply, therefore the power (pressure) of this air impingement pasta is smaller, accordingly, it is difficult to Mist of oil is generated fully in accumulator.

The present invention, in view of this actual conditions, its object is to generate efficiently mist of oil in accumulator.

For solving the scheme of problem

Therefore, the lubricating arrangement of the engine of the present invention is configured to include: crankshaft room, and it is by piston Move up and down and make the pressure of inside change;Accumulator, its be configured at crankshaft room lower section and for Store the oil of lubrication;Valve drive chamber, it is configured at the side of crankshaft room and for receiving air intake-exhaust The driving part of each valve system;1st partition wall, it is used for separating crankshaft room and accumulator;2nd point Next door, it is used for separating crankshaft room and valve drive chamber;1st opening portion, it runs through the 1st partition wall and connects Crankshaft room and accumulator;And the 2nd opening portion, it runs through the 2nd partition wall and connects crankshaft room and drive with valve Room.In the lubricating arrangement of engine, when in crankshaft room being malleation, the gas in crankshaft room is from the 1st The oil that opening portion is sprayed in accumulator and clashed in accumulator, thus in accumulator, generate mist of oil, and And the mist of oil in crankshaft room supplies to valve drive chamber via the 2nd opening portion.In the lubricating arrangement of engine, When in crankshaft room being negative pressure, the mist of oil in accumulator supplies to crankshaft room via the 1st opening portion.

The effect of invention

According to the present invention, when in crankshaft room being malleation, the gas in crankshaft room from the 1st opening portion to storage Spray and clash into the oil in accumulator in grease chamber, thus in accumulator, generate mist of oil.Thereby, it is possible to will Blow and promote the mist of oil in accumulator from the gas of high pressure of the crankshaft room pasta in accumulator Change (Japanese: ミ ス トization), therefore, it is possible to generate mist of oil in accumulator efficiently.

Accompanying drawing explanation

Fig. 1 is the stereogram of the engine in one embodiment of the present invention.

Fig. 2 is the top view of the engine in one embodiment of the present invention.

Fig. 3 is the I-I sectional view of Fig. 2.

Fig. 4 is the bent axle during crankcase of the engine observing one embodiment of the present invention from accumulator side The partial perspective view of case.

Fig. 5 is the bent axle representing the engine can support one embodiment of the present invention in the way of rotating The figure of bearing.

Fig. 6 be the lubricating arrangement of the engine in one embodiment of the present invention outline figure.

Description of reference numerals

1: engine;2: cylinder body;3: crankshaft room;4: crankcase;5: combustion chamber;6: cylinder cap; 7: fuel tank;9: bent axle;10: cylinder;11: piston;12: crank arm;13: connecting rod;15: air inlet Mouthful;16: exhaust outlet;17: silencer;18: intake valve;19: air bleeding valve;20: cavaera;25: Valve mechanism;26: valve drives gear;27: cam wheel;28: cam;30: valve drive chamber;32: Accumulator;33: the 1 partition walls;34: central portion;35: the 1 opening portions;36: cylindrical portion;40: Bearing;42: the 2 partition walls;43: opening portion, upside;44: open lower side portion;45: the 2 opening portions; 50: lubricating arrangement;61: circulating path;62: fuel feeding path;64: suction path;65: discharge logical Road;67: air purifier;68: separator;70: current return circuit.

Detailed description of the invention

Hereinafter, with reference to the accompanying drawings of embodiments of the present invention.

Fig. 1 and Fig. 2 is stereogram and the top view of the engine in one embodiment of the present invention.Fig. 3 is The I-I sectional view of Fig. 2.It addition, Fig. 3 represents is in starting when piston is positioned at the state of near top dead center Machine.It addition, in the present embodiment, upside and engine carry out state (the upright shape used the longlyest State) under vertical on the upside of substantially uniform.

Engine 1 is the four-stroke engine of OHV (Over Head Valve: overhead valve) form, It it is air-cooled type.

Engine 1 includes: cylinder body 2;Crankcase 4, it is configured at the end side of length direction of this cylinder body 2 (lower end side) also forms crankshaft room 3;And cylinder cap 6, it is configured at another of length direction of cylinder body 2 Side (upper end side) also forms combustion chamber 5 together with cylinder body 2.

In the present embodiment, cylinder body 2, crankcase 4 and cylinder cap 6 are independently constituted, and utilize spiral shell Bolt is connected.

The oily fuel tank 7 for storing lubrication it is linked with in the lower end of crankcase 4.

It is provided with crankcase 4 in the lower end of cylinder body 2, utilizes this cylinder body 2 and crankcase 4 in the way of can rotating Carry bent axle 9.

Specifically, the both ends of bent axle 9 are configured to the self-forming crankshaft room 3 in the inside of crankcase 4 and dash forward Go out.In the present embodiment, the both ends prominent from crankshaft room 3 in bent axle 9 are by cylinder body 2 and crankcase 4 Clamp and be supported to rotate.

It addition, in the present embodiment, an end (end of valve drive chamber 30 described later side of bent axle 9 Portion) supported as rotating by bearing 40 described later by cylinder body 2 and crankcase 4.It is used behind figure 5 illustrate this detailed content.

The cylinder 10 with columned space it is provided with in cylinder body 2.With can be along the vertical direction in cylinder 10 The mode moved back and forth is inserted with piston 11.Piston 11 is connected to crankshaft room by crank arm 12 and connecting rod 13 The bent axle 9 of 3.Thus, piston 11 move back and forth the rotary motion being converted to bent axle 9.It addition, pass through Moving back and forth of piston 11, the pressure (air pressure) in crankshaft room 3 changes.

It is provided with air inlet 15 and exhaust outlet 16 at cylinder cap 6.Air inlet 15 is connected with gasifier (not shown) Logical.Exhaust outlet 16 is connected with silencer 17.It addition, be equipped for opening and closing air inlet 15 at cylinder cap 6 Intake valve 18 and for the air bleeding valve 19 of opening and closing exhaust outlet 16.

It addition, be formed with the cavaera 20 for being accommodated into air valve 18 and air bleeding valve 19 at cylinder cap 6.Valve Room 20 is formed by cylinder cap 6 and valve cover 21.

It is connected with for driving this intake valve 18 and the gas of air bleeding valve 19 at intake valve 18 and air bleeding valve 19 Door mechanism 25 (with reference to Fig. 6).

Valve mechanism 25 is configured to include: valve drives gear 26, and it is fixed on bent axle 9;Cam wheel 27, It is driven gear 26 to drive by valve;Cam 28, it is connected at the one end of cam wheel 27;A pair convex Wheel driven member (not shown), it utilizes this cam 28 to swing, and rotatably supports In cylinder body 2;Pair of push rods (not shown), its rocker arm shaft being supported on the head being located at cylinder body 2 (is not schemed Show), and make one end abut against with the valve head of intake valve 18 and air bleeding valve 19;And valve spring (not shown), Intake valve 18 and air bleeding valve 19 are exerted a force by respectively to closing direction.

Constitute in the various piece of valve mechanism 25, valve driving gear 26, cam wheel 27 and cam 28 are accommodated in valve drive chamber 30.Valve drive chamber 30 is configured at the side of crankshaft room 3.Here, valve drives Room 30 is covered (not shown) by cylinder body 2, crankcase 4 and valve drive chamber and is formed.

Constitute in the various piece of valve mechanism 25, push rod and valve spring is accommodated in cavaera 20.Valve Room 20 is configured at the top of combustion chamber 5.

Here, valve mechanism 25 is corresponding with " each valve system of air intake-exhaust " of the present invention.Separately Outward, valve drives " each of air intake-exhaust of gear 26, cam wheel 27 and cam 28 and the present invention The driving part of valve system " corresponding.

Fuel tank 7 is formed by the housing surrounding four directions and lower section.By installing fuel tank 7 at crankcase 4, thus These casees 4,7 are utilized to form accumulator 32.The oil of lubrication is stored in accumulator 32.

Part in crankcase 4, semi-circular cylindrical can receive bent axle 9 in the way of rotating becomes separation Crankshaft room 3 and the 1st partition wall 33 of accumulator 32.

Fig. 4 is the crankcase 4 during the crankcase 4 of the engine 1 observing present embodiment from accumulator 32 side Partial perspective view.

As shown in Figure 3 and Figure 4, crankshaft room 3 and accumulator 32 utilize the 1st partition wall 33 to separate.1st point Next door 33 is formed as semi-barrel shape shape.That is, the 1st partition wall 33 plays in crankshaft room 3 side will be accommodated in this bent axle Crank arm 12 in room 3, can carry out the effect received in the way of rotating, accompanies with this, define to The curved face part that accumulator 32 side is prominent.And, the central portion 34 of this curved face part is to accumulator 32 side maximum journey Highlight degree.

Central portion 34 at the 1st partition wall 33 of semi-cylindrical shape is formed through connecting crankshaft room 3 and storage 1st opening portion 35 of grease chamber 32.

1st opening portion 35 is positioned at the piston 11 perspective plane on the 1st partition wall 33.That is, when from combustion chamber When 1 partition wall 33 is observed in 5 sides, in the region hidden by piston 11, it is formed through the 1st opening portion 35.

Preferably, the 1st opening portion 35 is positioned at the underface of central part of piston 11.In other words, preferably , the central axis of the 1st opening portion 35 and the central axis of piston 11 are positioned on same axis.

The aperture area of the 1st opening portion 35 is preferably in the range of the 3%~40% of the sectional area of piston 11, More preferably in the range of the 5%~35% of the sectional area of piston 11.

Here, the sectional area of piston 11 refer to piston 11 with piston 11 move back and forth direction (in other words, The central axis of piston 11) sectional area in orthogonal plane.

It addition, in the present embodiment, the cross sectional shape of the 1st opening portion 35 is rectangular-shaped, but the 1st opening The cross sectional shape in portion 35 is not limited to this, such as, can also be toroidal.

It addition, in the present embodiment, the 1st opening portion 35 includes a through hole, but can also wrap in addition Include plural through hole.In the case of the 1st opening portion 35 includes plural through hole, two with On through hole aperture area summation (total aperture area) be preferably piston 11 sectional area 3%~ In the range of 40%, more preferably in the range of the 5%~35% of the sectional area of piston 11.

At the lower surface of the 1st partition wall 33 of semi-cylindrical shape to surround the side around the 1st opening portion 35 Formula is provided with cylindrical portion 36.Cylindrical portion 36 is to more prominent than the lower surface of the 1st partition wall 33 position on the lower.

It addition, in the present embodiment, the cross sectional shape of cylindrical portion 36 is rectangular-shaped, but cylindrical portion 36 Cross sectional shape be not limited to this, can also be such as toroidal.

Fig. 5 is the bearing of the bent axle 9 representing the engine 1 can support present embodiment in the way of rotating The figure of 40.

Crankshaft room 3 and valve drive chamber 30 utilize the 2nd partition wall 42 to separate.2nd partition wall 42 includes cylinder body 2 With crankcase 4.

In the 2nd partition wall 42, the bottom of cylinder body 2 is formed with the cross sectional shape being formed as semicircle shape Opening portion 43, upside.

In the 2nd partition wall 42, the upper end of crankcase 4 is formed with the cross sectional shape being formed as semicircle shape Open lower side portion 44.

2nd opening portion 45 includes the opening portion, upside 43 of semicircle shape and the open lower side portion 44 of semicircle shape, cuts Face shape is toroidal.

The 2nd partition wall 42 is run through in 2nd opening portion 45, and connects crankshaft room 3 and valve drive chamber 30.

It has been inserted into bearing 40 in the 2nd opening portion 45 of the 2nd partition wall 42.That is, at the 2nd partition wall 42 It is provided with bearing 40 in 2nd opening portion 45.

Bearing 40 be within it circle with outer ring between there is gap and have between its multiple balls between Gap, opening ball bearing.Therefore, bearing 40 allows that mist of oil (vaporific oil) passes through.

Bearing 40 within it encloses the end (end of valve drive chamber 30 side) being inserted into bent axle 9, and So that bent axle 9 can be supported in the way of rotating.

Therefore, an end (end of valve drive chamber 30 side) of bent axle 9 is by cylinder body 2 and crankcase 4 Hold as rotating by bearing 40.

Here, in an end of bent axle 9, the part that is positioned at valve drive chamber 30 is fixed with valve and drives Moving gear 26.It addition, in Figure 5, the figure of the cam wheel 27 being driven gear 26 to drive by valve is eliminated Show.

Then, use Fig. 6 that the lubricating arrangement 50 of the engine 1 in present embodiment is described.

Fig. 6 be the lubricating arrangement 50 of the engine 1 in present embodiment outline figure.

The lubricating arrangement 50 of engine 1 utilizes the pressure in the crankshaft room 3 caused by the reciprocating motion of piston 11 Variation, makes to be stored in the oil circulation of accumulator 32, is lubricated the various piece of engine 1.

The circulating path 61 of fuel feeding circulation it is provided with between accumulator 32 and cavaera 20.This circulating path 61 Including the 1st opening portion 45, opening portion the 35, the 2nd, valve drive chamber 30, cavaera 20, fuel feeding path 62 and Crankshaft room 3.

If becoming negative pressure state in making crankshaft room 3 due to piston 11 to moving of top dead centre side, then oil storage Mist of oil in room 32 supplies to crankshaft room 3 via the 1st opening portion 35.

Afterwards, if becoming barotropic state in making crankshaft room 3 due to piston 11 to moving of lower dead center side, Then the mist of oil in crankshaft room 3 supplies to valve drive chamber 30 and cavaera 20 via the 2nd opening portion 45.

Here, be provided with bearing 40 (with reference to Fig. 5) in the 2nd opening portion 45.Thus, the oil in crankshaft room 3 The mist of oil that in mist, particle diameter is bigger is swept by bearing 40, therefore from crankshaft room 3 to valve drive chamber 30 Circulation is restricted.On the other hand, in the mist of oil in crankshaft room 3, mist of oil that particle diameter is smaller via The gap between gap and multiple ball between inner ring and the outer ring of bearing 40 supplies to valve drive chamber 30 Give.

The valve constituting valve mechanism 25 drives gear 26, cam wheel 27, cam 28, push rod and valve spring By the fog lubrication of flowing in circulating path 61.

The suction path of the oil being stranded in cavaera 20 for suction it is configured with in the inner side of cavaera 20 64.Fuel feeding path 62 it is equipped with between suction path 64 and crankshaft room 3.

The open end of the end side of fuel feeding path 62 is connected at suction path 64, and the connection of another side sets In crankshaft room 3.Here, the open end of another side of fuel feeding path 62 is arranged in when piston 11 arrives Position fully open during top dead centre.

It is stranded in the mist of oil of cavaera 20 to become in making crankshaft room 3 to moving of top dead centre due to piston 11 For being sucked by the opening from fuel feeding path 62 during negative pressure state, and via suction path 64 and fuel feeding path 62 Carry to crankshaft room 3.

The oil delivered in crankshaft room 3 returns accumulator 32 via the 1st opening portion 35.

Be configured with in the inner side of cavaera 20 for by gas leakage contained in the circulating path of oil to combustion Burn the drain passageway 65 that room 5 is discharged.The end side 66 of drain passageway 65 is connected in cavaera 20, separately End side is connected at air purifier 67.Here, air purifier 67 is located at the upstream of above-mentioned gasifier Side, and there is the function of the dust etc. removed in air.

The separator in air purifier 67 is located in gas leakage that deliver to air purifier 67, that contain oil point 68 gas-liquid separations are gas leakage and oil.Isolated oil returns via connection air purifier 67 and crankshaft room 3 Circulation flow path 70 carries to crankshaft room 3.Here, the open end of crankshaft room 3 side of current return circuit 70 is arranged in The position fully open when piston 11 arrives top dead centre.Therefore, the isolated oil of separator 68 is utilized to exist By via current return circuit when becoming negative pressure state in making crankshaft room 3 to moving of top dead centre due to piston 11 70 suck, and carry to crankshaft room 3.On the other hand, in the isolated gas leakage of separator 68 in combustion chamber 5 Discharge to outside via silencer 17 after middle burning.

If becoming barotropic state in making crankshaft room 3 due to piston 11 to moving of lower dead center side, then bent axle The gas of the high pressure in room 3 sprays in accumulator 32 from the 1st opening portion 35.In other words, along with piston Gas in 11 crankshaft room 3 being extruded to moving of lower dead center side from the 1st opening portion 35 to accumulator Injection in 32.Oil in the air impingement accumulator 32 of this injection.Like this, from crankshaft room 3 The gas of high pressure pasta in accumulator 32 blows, thus promotes the oil atomization in accumulator 32, Mist of oil is generated efficiently in accumulator 32.

If here, the aperture area of the 1st opening portion 35 is excessive, then the gas being difficult to make in crankshaft room 3 via 1st opening portion 35 energetically impinges upon the pasta in accumulator 32, and then, exist and be difficult to carry out well oil The possibility of atomization.If it addition, the aperture area of the 1st opening portion 35 is too small, then crankshaft room 3 as pump that Sample plays a role, and the power output of engine 1 is likely to reduce.That is, the aperture area of the 1st opening portion 35 Higher limit it can be considered that the formation efficiency of mist of oil in accumulator 32 is set.It addition, the 1st opens The lower limit of the aperture area of oral area 35 is it can be considered that the demand power output of engine 1 is set. In view of these aspects, the aperture area of the 1st opening portion 35 be preferably the sectional area of piston 11 3%~ In the range of 40%, more preferably in the range of the 5%~35% of the sectional area of piston 11.

According to present embodiment, the lubricating arrangement 50 of engine 1 is configured to include: crankshaft room 3, it passes through The up and down motion of piston 11 and make the pressure of inside change;Accumulator 32, it is configured at crankshaft room 3 Lower section and for store lubrication oil;Valve drive chamber 30, it is configured at the side of crankshaft room 3 and uses Driving part in each valve system of storage air intake-exhaust;1st partition wall 33, it is used for separating song Axle room 3 and accumulator 32;2nd partition wall 42, it is used for separating crankshaft room 3 and valve drive chamber 30;1st opens Oral area 35, it runs through the 1st partition wall 33 and connects crankshaft room 3 and accumulator 32;And the 2nd opening portion 45, It runs through the 2nd partition wall 42 and connects crankshaft room 3 and valve drive chamber 30.Lubricating arrangement 50 at engine 1 In, when in crankshaft room 3 being malleation, the gas in crankshaft room 3 from the 1st opening portion 35 in accumulator 32 Spray and clash into the oil in accumulator 32, thus generate in mist of oil, and crankshaft room 3 in accumulator 32 Mist of oil supply to valve drive chamber 30 via the 2nd opening portion 45.In the lubricating arrangement 50 of engine 1, when When being negative pressure in crankshaft room 3, the mist of oil in accumulator 32 supplies to crankshaft room 3 via the 1st opening portion 35. Thus, by making the gas of the high pressure from crankshaft room 3 pasta in accumulator 32 blow and waviness, It is thus possible to promote the oil atomization in accumulator 32, therefore, it is possible to generate oil in accumulator 32 efficiently Mist.

It addition, according to present embodiment, the 1st opening portion 35 is positioned at the piston 11 throwing on the 1st partition wall 33 In shadow face.Thereby, it is possible to utilize piston 11 moves back and forth the gas of high pressure that will produce in crankshaft room 3 Body effectively blows and waviness to the pasta in accumulator 32 from the 1st opening portion 35, therefore, it is possible to more effectively Ground carries out the generation of the mist of oil in accumulator 32.

It addition, according to present embodiment, the sectional area that aperture area is piston 11 of the 1st opening portion 35 In the range of 3%~40%.Thereby, it is possible to be in accumulator 32, generate mist of oil efficiently, and can be true Protect the demand power output of engine 1.

It addition, according to present embodiment, the 1st partition wall 33 has to surround the surrounding of the 1st opening portion 35 Mode is to the cylindrical portion 36 more prominent than the lower surface of the 1st partition wall 33 position on the lower.Thus, sending out During motivation 1 handstand operating etc., it is possible to suppress the oil in accumulator 32 via the 1st opening portion 35 to crankshaft room 3 Interior excessively inflow.

It addition, according to present embodiment, be provided with to support in the way of rotating in the 2nd opening portion 45 The bearing 40 of bent axle 9.Bearing 40 is to allow the opening ball bearing that mist of oil passes through.Thus, bent axle The mist of oil in mist of oil in room 3, particle diameter is smaller is via the gap between inner ring and the outer ring of bearing 40 And the gap between multiple ball supplies to valve drive chamber 30, therefore, it is possible to suppression oil is to valve drive chamber 30 Oversupply with cavaera 20.

It addition, in the present embodiment, it is also possible to according to piston 11 in the cylinder 10 of engine 1 on move down The volume (swept volume) of dynamic scope sets the size of the 1st opening portion 35, aperture area, shape Deng.

It addition, in the present embodiment, from the 1st opening portion 35 to injection in accumulator 32 and to accumulator The flow velocity (in other words, the blowout speed of the gas in the 1st opening portion 35) of the gas that the pasta in 32 blows It is preferably in the range of 1000cm/s~10000cm/s, more preferably 1500cm/s~8000cm/s In the range of.By the blowout speed of the gas in the 1st opening portion 35 is set within the above range, energy The generation of enough mist of oils carried out efficiently in accumulator 32.

It addition, the engine 1 in present embodiment can be at brush cutter, pit-picker, concrete cutting machine Carry as its driving source etc. in portable apparatus for work.It addition, engine 1 can be backpack The Backpack power devices such as air blast, sprayer (spraying machine), duster, knapsack type brush cutter are made Carry for its driving source.

As can be observed from the foregoing, it is illustrated that embodiment the most simply illustrate the present invention, the present invention except utilize Beyond the direct disclosure of embodiment illustrated, certainly it is additionally included in claims interior by this area The various improvement changes that technical staff is carried out.

Claims (5)

1. a lubricating arrangement for engine, wherein, the lubricating arrangement of this engine is configured to include:
Crankshaft room, it makes the pressure of inside change by the up and down motion of piston;
Accumulator, it is configured at the lower section of described crankshaft room and for storing the oil of lubrication;
Valve drive chamber, it is configured at the side of described crankshaft room and for receiving each valve of air intake-exhaust The driving part of mechanism;
1st partition wall, it is used for separating described crankshaft room and described accumulator;
2nd partition wall, it is used for separating described crankshaft room and described valve drive chamber;
1st opening portion, it runs through described 1st partition wall and connects described crankshaft room and described accumulator;With And
2nd opening portion, it runs through described 2nd partition wall and connects described crankshaft room and described valve drive chamber;
When in described crankshaft room being malleation, the gas in described crankshaft room from described 1st opening portion to institute Spray and clash into the oil in described accumulator in stating accumulator, thus in described accumulator, generate mist of oil, And the mist of oil in described crankshaft room supplies to described valve drive chamber via described 2nd opening portion,
When in described crankshaft room being negative pressure, the mist of oil in described accumulator via described 1st opening portion to Described crankshaft room supplies.
The lubricating arrangement of engine the most according to claim 1, wherein,
Described 1st opening is in described piston perspective plane on described 1st partition wall.
The lubricating arrangement of engine the most according to claim 1 and 2, wherein,
In the range of the 3%~40% of the sectional area that aperture area is described piston of described 1st opening portion.
4. according to the lubricating arrangement of the engine according to any one of claims 1 to 3, wherein,
Described 1st partition wall there is the surrounding to surround described 1st opening portion in the way of to described 1st point of ratio The cylindrical portion that the lower surface in next door position on the lower is prominent.
5. according to the lubricating arrangement of the engine according to any one of Claims 1 to 4, wherein,
It is provided with in the way of rotating, to support the bearing of bent axle in described 2nd opening portion,
Described bearing is to allow the opening ball bearing that described mist of oil passes through.
CN201510973723.4A 2015-02-05 2015-12-22 Lubricating device for engine CN105863772A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2015-020886 2015-02-05
JP2015020886A JP6357119B2 (en) 2015-02-05 2015-02-05 Engine lubrication equipment

Publications (1)

Publication Number Publication Date
CN105863772A true CN105863772A (en) 2016-08-17

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Application Number Title Priority Date Filing Date
CN201510973723.4A CN105863772A (en) 2015-02-05 2015-12-22 Lubricating device for engine

Country Status (4)

Country Link
US (1) US20160230621A1 (en)
EP (1) EP3059404A1 (en)
JP (1) JP6357119B2 (en)
CN (1) CN105863772A (en)

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