CN105332761B - The lubricating system of hand four stroke engine - Google Patents

The lubricating system of hand four stroke engine Download PDF

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Publication number
CN105332761B
CN105332761B CN201510912008.XA CN201510912008A CN105332761B CN 105332761 B CN105332761 B CN 105332761B CN 201510912008 A CN201510912008 A CN 201510912008A CN 105332761 B CN105332761 B CN 105332761B
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CN
China
Prior art keywords
oil
room
gas
waste gas
crankshaft
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CN201510912008.XA
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Chinese (zh)
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CN105332761A (en
Inventor
王浦亮
胡寿仁
张力
徐明智
周彪
吴潘浩
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浙江中坚科技股份有限公司
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Priority to CN201510912008.XA priority Critical patent/CN105332761B/en
Publication of CN105332761A publication Critical patent/CN105332761A/en
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Publication of CN105332761B publication Critical patent/CN105332761B/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
    • F01M1/00Pressure lubrication
    • F01M1/06Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • 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
    • F01M11/06Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
    • F01M11/062Accommodating movement or position of machines or engines, e.g. dry sumps
    • 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
    • F01M11/08Separating lubricant from air or fuel-air mixture before entry into cylinder
    • 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
    • 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
    • F01M1/06Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • F01M2001/062Crankshaft with passageways
    • 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
    • F01M1/06Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • F01M2001/066Connecting rod with passageways

Abstract

The invention discloses a kind of lubricating system of hand four stroke engine,Including accumulator (21),Crankshaft room (14),Rocking arm cavaera (11),Cam chamber (32),Tappet room (27),Gas and oil separating plant,The oil suction oil duct (34) of accumulator (21) and crankshaft room (14) is communicated with described casing (17) and crankshaft-link rod component (33),Casing (17),The passage that oils (10) of crankshaft room (14) and rocking arm cavaera (11) is communicated with cylinder block (15) and cylinder head cover (9) by the first check valve (23),Cylinder head cover (9),Connecting rocker arm cavaera (11) and the first drainback passage (13) of crankshaft room (14) are provided with by the second check valve (16) in cylinder block (15) and casing (17),The 3rd drainback passage (25) is provided with by the 3rd check valve (26) between gas and oil separating plant and crankshaft room (14).Using after this said structure, have the characteristics that simple and compact for structure, lubricating efficiency is high, good oil gas separation effect, any attitude can normal operation.

Description

The lubricating system of hand four stroke engine

Technical field

The invention is related to a kind of hand four stroke engine, and particularly a kind of any attitude can be run hand-held The lubricating system of formula four-stroke engine.

Background technology

With the continuous development of society and the progress of science and technology, also constantly transition rises for various garden instruments and small agricultural mechanism Level and update, miniature gasoline engine constantly lifts in gardens and agricultural etc. demand, in the market or with can be any Based on the two stroke engine of direction work, but as environmental problem is increasingly serious, emission request improves constantly, and hand-held four rushes Journey engine will necessarily substitute two stroke engine afterwards.

Hand four stroke engine is in use, it may appear that the following aspects problem:First, engine is in work When making, it is ensured that each operating parts such as crankshaft connecting rod system, valve actuating mechanism are reliable, it is necessary to assure each works There is sufficient oil to ensure to lubricate, but lubricating system is in each works at present, lubrication is less desirable;Second, start Machine arbitrarily upset the course of work in, do not have a good guarantee it is each operating parts lubrication, or occur machine oil with Gas, which together enters air filter, causes burn oil phenomenon, so as to influence the operating efficiency of machine.At present, in the market product is more or less The defects of above-mentioned all be present.Therefore, many manufacturers and knowledgeable people are researched and developed regarding to the issue above, but extremely The present, there has been no more rational product to emerge.

The content of the invention

To overcome drawbacks described above existing for prior art, the purpose of the invention be to provide it is a kind of it is simple and compact for structure, Oil duct set rationally, lubricating efficiency height, good oil gas separation effect, engine any attitude can normal operation hand-held four The lubricating system of Stroke Engine.

The invention solves technical scheme used by above-mentioned technical problem, includes the oil storage of oil sump and casing composition Rocking arm cavaera, cylinder block and the cam side cover group that crankshaft room, cylinder block and the cylinder head cover of room, casing and cylinder block composition form Into cam chamber, be attached to cylinder block side tappet room, air filter, is provided with piston component in cylinder block, crankshaft room is provided with bent axle Link assembly, rocking arm cavaera are provided with rocking arm valve assembly, and tappet room is provided with tappet assembly, and cam chamber is provided with cam pack, institute Accumulator and the oil suction oil duct of crankshaft room, casing, cylinder block and cylinder head cover are communicated with the casing and crankshaft-link rod component stated On be communicated with the passage that oils of crankshaft room and rocking arm cavaera, the import for the passage that oils is provided with the first check valve, cylinder head cover, gas Cylinder body and casing are provided with connecting rocker arm cavaera and the first drainback passage of crankshaft room, and it is single that the first drainback passage is provided with second To valve, rocking arm cavaera is connected by tappet room with cam chamber, and the second drainback passage is provided between crankshaft room and accumulator.

The further scheme of the invention, described cam side cover and cam side cover plate composition gas and oil separating plant, oil gas Separator is connected with cam chamber, gas and oil separating plant separation oil return by return hose and be arranged in cylinder block the 3rd Drainback passage enters crankshaft room, and the 3rd drainback passage is provided with the 3rd check valve, and the waste gas of gas and oil separating plant separation, which passes through, to give up Gas flexible pipe is connected with air filter.

The further scheme of the invention, the cavity of the cam side cover is interior to be provided with central dividing plate and gas and oil separating plant It is divided into Oil-gas Separation room and waste gas drain chamber, oil filter screen, Oil-gas Separation room and waste gas drain chamber is provided with Oil-gas Separation room Between be provided with waste gas discharge groove, Oil-gas Separation room top is provided with the oil-gas hole that connect with cam chamber, and bottom is provided with soft with backflow The oil return opening of pipe connection, waste gas drain chamber are provided with the Waste gas outlet being connected with waste gas flexible pipe;Oil-gas Separation during normal condition The refluxing opening of room is below the Waste gas outlet of waste gas drain chamber;Air filter side down when Oil-gas Separation room refluxing opening positioned at useless Separated on the left of the Waste gas outlet of gas drain chamber and by central dividing plate;Silencer side down when the refluxing opening of Oil-gas Separation room and useless The Waste gas outlet of gas drain chamber is on top, and oil return aperture is in bottom;The refluxing opening of Oil-gas Separation room is on top during handstand work, Oil return aperture is in bottom;Clutch side down when rocking arm cavaera, tappet room and cam chamber all in lower section, the backflow of Oil-gas Separation room The second oil absorption head on mouth is less than the Waste gas outlet of waste gas drain chamber;Starter side down when Oil-gas Separation room refluxing opening it is low In the Waste gas outlet of waste gas drain chamber.

The further scheme of the invention, described Oil-gas Separation room top is at least provided with a time connected with cam chamber Oil-gas hole, the position of oil return stomata are higher than oil-gas hole.

The further scheme of the invention, the import of the oil suction oil duct are connected with oil absorption head by oil suction flexible pipe.

The further scheme of the invention, the tappet coordinated with tappet assembly is provided with the tappet room and crosses set.

The further scheme of the invention, described air filter is interior to be provided with filter core and gas-distribution pipe, and waste gas flexible pipe passes through unidirectional Valve is connected with air filter.

After said structure, have the following advantages compared with prior art and effect:One is due to casing and crankshaft-link rod Accumulator and the oil suction oil duct of crankshaft room are communicated with component, the import of oil suction oil duct connects oil absorption head by oil suction flexible pipe, Engine is set to suck machine oil from accumulator in any operating attitude, machine oil smashes in crankshaft high-speed operating and is atomized and lubricates work The parts such as plug assembly, crankshaft-link rod component, the oil gas of atomization shake by the passage lubrication that oils on casing, cylinder block and cylinder head cover Arm valve assembly, most of oil gas return to crankshaft room, fraction by the first drainback passage on cylinder head cover, cylinder block and casing The tappet assembly of oil-air lubrication tappet room and the cam pack of cam chamber, each moving component, which has been effectively ensured, can obtain fully Lubrication, high lubricating effect, efficiency high.Second, the oil gas of cam chamber enters gas and oil separating plant, due to being set in gas and oil separating plant Having and meet that engine can be by the Oil-gas Separation room of Oil-gas Separation in any attitude, good oil gas separation effect, lubrication oil consumption is low, To ensure engine in any attitude reliably working.

Brief description of the drawings

Fig. 1 is the structural representation of the invention.

Fig. 2 is the sectional view of the invention.

Fig. 3 is the structural representation of the invention cam side cover.

Fig. 4 is the cylinder head cover structural representation of the invention.

Fig. 5 is the invention Fig. 4 A-A sectional views.

Fig. 6 is structural representation when the invention air filter works down.

Fig. 7 is structural representation when the invention silencer works down.

Fig. 8 is structural representation when work is inverted in the invention.

Fig. 9 is structural representation when the invention clutch mechanism works down.

Figure 10 is structural representation when the invention starter mechanism works down.

Wherein 1 oil return hose, 2 waste gas flexible pipes, 3 fuel tanks, 4 check valves, 5 filter cores, 6 rocking arm valve assemblies, 7 gas-distribution pipes, 8 is empty Filter, 9 cylinder head covers, 10 oil passage, 11 rocking arm cavaeras, 12 piston components, 13 first drainback passages, 14 crankshaft room, 15 gas Cylinder body, 16 second check valves, 17 casings, 18 cam packs, 19 machine oil mouths, 20 oil sumps, 21 accumulators, 22 second oil returns are led to Road, 23 first check valves, 24 tappets cross set, 25 the 3rd drainback passages, 26 the 3rd check valves, 27 tappet rooms, 28 cam side covers, and 29 Cam side cover plate, 30 Oil-gas Separation rooms, 31 waste gas drain chambers, 32 cam chambers, 33 crankshaft-link rod components, 34 oil suction oil ducts, 35 endure Bar assembly, 36 oil suction flexible pipes, 37 oil absorption heads, 38 oil filter screens, 39 oil-gas holes, 40 oil return apertures, 41 central dividing plates, 42 waste gas row Go out groove, 43 second oil suction flexible pipes, 44 second oil absorption heads.

Embodiment

It is a kind of specific embodiment party of the lubricating system of hand four stroke engine of the invention shown in Fig. 1 to Fig. 5 Case, it includes crankshaft room 14, the cylinder block that accumulator 21, the casing 17 that oil sump 20 forms with casing 17 form with cylinder block 15 Cam chamber 32 that the 15 rocking arm cavaeras 11 formed with cylinder head cover 9, cylinder block 15 and cam side cover 28 form, it is attached to cylinder block 15 The tappet room 27 of side, air filter 8, fuel tank 3, organic oil mouth 19 is connected on oil sump 20, piston component is provided with cylinder block 15 12, crankshaft room 14 is provided with crankshaft-link rod component 33, and rocking arm cavaera 11 is provided with rocking arm valve assembly 6, and tappet room 27 is provided with tappet Component 35, cam chamber 32 are provided with cam pack 18, accumulator 21 are communicated with described casing 17 and crankshaft-link rod component 33 With the oil suction oil duct 34 of crankshaft room 14, the import of the oil suction oil duct 34 is connected with oil absorption head 37, casing by oil suction flexible pipe 36 17th, the passage 10 that oils of crankshaft room 14 and rocking arm cavaera 11 is communicated with cylinder block 15 and cylinder head cover 9, oil passage 10 Import is provided with the first check valve 23, and cylinder head cover 9, cylinder block 15 and casing 17 are provided with connecting rocker arm cavaera 11 and crankshaft room 14 The first drainback passage 13, the first drainback passage 13 is provided with the second check valve 16, rocking arm cavaera 11 by tappet room 27 with Cam chamber 32 is connected, and the second drainback passage 22 is provided between crankshaft room 14 and accumulator 21.

In order to be separated to the oil gas in cam chamber 32, described cam side cover 28 forms oil gas with cam side cover plate 29 Separator, gas and oil separating plant are connected with cam chamber 32, and the oil return of gas and oil separating plant separation by return hose 1 and is set The 3rd drainback passage 25 in cylinder block 15 enters crankshaft room 14, and the 3rd drainback passage 25 is provided with the 3rd check valve 26, oil The waste gas of air separation separation is connected by waste gas flexible pipe 2 with air filter 8.Centre is provided with the cavity of the cam side cover 28 Gas and oil separating plant is simultaneously divided into Oil-gas Separation room 30 and waste gas drain chamber 31 by dividing plate 41, and machine oil is provided with Oil-gas Separation room 30 Filter screen 38, waste gas discharge groove 42 is provided between Oil-gas Separation room 30 and waste gas drain chamber 31, the top of Oil-gas Separation room 30 is provided with The oil-gas hole 39 connected with cam chamber 32, bottom are provided with the oil return opening that be connected with return hose 1, waste gas drain chamber 31 provided with The connected Waste gas outlet of waste gas flexible pipe 2.What the described top of Oil-gas Separation room 31 connected at least provided with one with cam chamber 32 Oil return stomata 40, the position of oil return stomata 40 are higher than oil-gas hole 39.Filter core 5 and gas-distribution pipe 7 are provided with described air filter 8, is given up Gas flexible pipe 2 is connected by check valve 4 with air filter 8.

In order to effectively control the oil gas by tappet room 27, it is provided with the tappet room 27 and is endured with what tappet assembly 35 coordinated Bar crosses set 24.

The engine work state of the invention is as shown in Fig. 1 to 5, when engine start-up operation and piston stroking upward When, negative pressure is formed in crankshaft room 14, the check valve 23 of check valve 4 and first is closed, second and the 3rd check valve 16,26 open, storage The machine oil of grease chamber 21 sucks oil suction oil duct 34 by oil absorption head 37 and oil suction flexible pipe 36 and enters crankshaft room 14, and machine oil is in crankshaft high-speed Smash to form mist of oil and lubricate the parts such as piston component 12, crankshaft-link rod component 33 during operating;In suction function lower shake-changing arm valve Most of oil gas in room 11 is drawn into crankshaft room 14 by the first drainback passage 13;Fraction oil gas in rocking arm cavaera 11 Into tappet room 27 and cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30, now, Oil-gas Separation in cam chamber 32 The refluxing opening of room 30 is below the Waste gas outlet of waste gas drain chamber 31, and after separation, machine oil passes through the oil return of oil return hose 1 and the 3rd Passage 25 enters crankshaft room 14, and the waste gas containing a small amount of oil gas is temporarily stored in waste gas drain chamber 31.When descent of piston, crankshaft room Malleations are formed in 14, the check valve 23 of check valve 4 and first is opened, second and the 3rd check valve 16,26 close, crankshaft room's interior oil Mist enters rocking arm cavaera 11 by the passage 10 that oils and lubricates rocking arm valve assembly 6, the fraction oil gas in rocking arm cavaera 11 Into tappet room 27 and the lubrication tappet assembly 35 of cam chamber 32 and cam pack 18, air and mist of oil are mixed into cam chamber 32 Oil-gas Separation room 30, after separation, machine oil is temporarily stored in Oil-gas Separation room 30, and the waste gas containing a small amount of oil gas passes through in waste gas drain chamber 31 Enter after the discarded entrance of flexible pipe 2 air filter 8 with fresh air and burn again.After engine stop works, rocking arm cavaera 11 Interior residual machine oil flows into tappet room 27, into cam chamber 32, is returned finally by the second drainback passage 22 in accumulator 21.

The side of air filter of engine 8 working condition directed downwardly as shown in fig. 6, when engine is started working and during piston stroking upward, Negative pressure is formed in crankshaft room 14, the check valve 23 of check valve 4 and first is closed, second and the 3rd check valve 16,26 open, accumulator 21 machine oil sucks oil suction oil duct 34 by oil absorption head 37 and oil suction flexible pipe 36 and enters crankshaft room 14, and machine oil operates in crankshaft high-speed When smash to form mist of oil and lubricate the parts such as piston component 12, crankshaft-link rod component 33;In suction function lower shake-changing arm cavaera 11 Interior most of oil gas is drawn into crankshaft room 14 by the first drainback passage 13;Fraction oil gas in rocking arm cavaera 11 enters Tappet room 27 and cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30 in cam chamber 32, and Oil-gas Separation room 30 is returned Head piece is located on the left of the Waste gas outlet of waste gas drain chamber 31 and separated by central dividing plate 41, and after separation, machine oil is soft by oil return The drainback passage 25 of pipe 1 and the 3rd enters crankshaft room 14, and the waste gas containing a small amount of oil gas is temporarily stored in waste gas drain chamber 31.Work as piston When descending, malleation is formed in crankshaft room 14, the check valve 23 of check valve 4 and first is opened, second and the 3rd check valve 16,26 close Close, mist of oil enters the lubrication rocking arm of rocking arm cavaera 11 valve assembly 6, rocking arm cavaera 11 by the passage 10 that oils inside crankshaft room Interior fraction oil gas enters tappet room 27 and cam chamber 32 and lubricates tappet assembly 35 and cam pack 18, air in cam chamber 32 Oil-gas Separation room 30 is mixed into mist of oil, after separation, machine oil is temporarily stored in Oil-gas Separation room 30, contains in waste gas drain chamber 31 few The waste gas of gauging gas enters after discarded flexible pipe 2 enters air filter 8 with fresh air to burn again.

Muffler for motor side working condition directed downwardly is bent as shown in fig. 7, when engine is started working and during piston stroking upward Negative pressure is formed in axle room 14, the check valve 23 of check valve 4 and first is closed, second and the 3rd check valve 16,26 open, accumulator 21 Machine oil oil suction oil duct 34 sucked by oil absorption head 37 and oil suction flexible pipe 36 enter crankshaft room 14, machine oil is when crankshaft high-speed operates Smash to form mist of oil and lubricate the parts such as piston component 12, crankshaft-link rod component 33;In suction function lower shake-changing arm cavaera 11 Most of oil gas be drawn into crankshaft room 14 by the first drainback passage 13;Fraction oil gas in rocking arm cavaera 11, which enters, to be endured Bar room 27 and cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30 in cam chamber 32, now Oil-gas Separation room 30 Refluxing opening and the Waste gas outlet of waste gas drain chamber 31 are on top, and for oil return aperture 40 behind bottom, separation, machine oil is small by oil return Cam chamber 32 is directly flowed back in hole 40, then enters accumulator 21 from cam chamber 32, and the waste gas containing a small amount of oil gas is temporarily stored in waste gas row Put in room 31.When descent of piston, malleation is formed in crankshaft room 14, the check valve 23 of check valve 4 and first is opened, and second and the 3rd Check valve 16,26 is closed, and mist of oil enters the lubrication rocking arm valve assembly of rocking arm cavaera 11 by the passage 10 that oils inside crankshaft room 6, the fraction oil gas in rocking arm cavaera 11 enters tappet room 27 and cam chamber 32 lubricates tappet assembly 35 and cam pack 18, Air and mist of oil are mixed into Oil-gas Separation room 30 in cam chamber 32, and after separation, machine oil flows back to cam chamber by oil return aperture 40 32, then enter accumulator 21 from cam chamber 32, the interior waste gas containing a small amount of oil gas of waste gas drain chamber 31 enters sky through discarded flexible pipe 2 Enter after filter 8 with fresh air and burn again.

Engine handstand working condition is as shown in figure 8, when engine is started working and during piston stroking upward, shape in crankshaft room 14 Into negative pressure, the check valve 23 of check valve 4 and first is closed, second and the 3rd check valve 16,26 open, the machine oil of accumulator 21 passes through Oil absorption head 37 and oil suction flexible pipe 36 suck oil suction oil duct 34 and enter crankshaft room 14, and machine oil smashes to form oil when crankshaft high-speed operates Mist simultaneously lubricates the parts such as piston component 12, crankshaft-link rod component 33;Most of oil in suction function lower shake-changing arm cavaera 11 Gas is drawn into crankshaft room 14 by the first drainback passage 13;Fraction oil gas in rocking arm cavaera 11 enters tappet room 27 and convex Engineer room 32, air and air-fuel mixture enter Oil-gas Separation room 30 in cam chamber 32, and now, the refluxing opening of Oil-gas Separation room 30 is upper Portion, for oil return aperture 40 behind bottom, separation, machine oil directly flows back to cam chamber 32 by oil return aperture 40, then enters from cam chamber 32 Enter accumulator 21, the waste gas containing a small amount of oil gas is temporarily stored in waste gas drain chamber 31.When descent of piston, formed in crankshaft room 14 Malleation, the check valve 23 of check valve 4 and first are opened, second and the 3rd check valve 16,26 close, mist of oil passes through upper inside crankshaft room Oily passage 10 enters rocking arm cavaera 11 and lubricates rocking arm valve assembly 6, and the fraction oil gas in rocking arm cavaera 11 enters tappet Room 27 and cam chamber 32 lubricate tappet assembly 35 and cam pack 18, and air and mist of oil are mixed into Oil-gas Separation in cam chamber 32 Room 30, after separation, machine oil flows back to cam chamber 32 by oil return aperture 40, then enters accumulator 21, waste gas discharge from cam chamber 32 The waste gas containing a small amount of oil gas enters with fresh air after discarded flexible pipe 2 enters air filter 8 and burnt again in room 31.

Engine clutch side working condition directed downwardly is bent as shown in figure 9, when engine is started working and during piston stroking upward Negative pressure is formed in axle room 14, the check valve 23 of check valve 4 and first is closed, second and the 3rd check valve 16,26 open, accumulator 21 Machine oil oil suction oil duct 34 sucked by oil absorption head 37 and oil suction flexible pipe 36 enter crankshaft room 14, machine oil is when crankshaft high-speed operates Smash to form mist of oil and lubricate the parts such as piston component 12, crankshaft-link rod component 33;In suction function lower shake-changing arm cavaera 11 Most of oil gas be drawn into crankshaft room 14 by the first drainback passage 13;Fraction oil gas in rocking arm cavaera 11, which enters, to be endured Bar room 27 and cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30 in cam chamber 32, now, rocking arm cavaera 11, The second oil absorption head 44 of tappet room 27 and cam chamber 32 all on lower section, the refluxing opening of Oil-gas Separation room 30 is less than waste gas drain chamber 31 Waste gas outlet, the machine oil of rocking arm cavaera 11 and tappet room 27 passes through cam chamber 32 and flows into accumulator 21, after separation, machine oil Crankshaft room 14 is entered by the drainback passage 25 of oil return hose 1 and the 3rd, the waste gas containing a small amount of oil gas is temporarily stored in waste gas drain chamber In 31.When descent of piston, malleation is formed in crankshaft room 14, the check valve 23 of check valve 4 and first is opened, and second and the 3rd unidirectional Valve 16,26 is closed, and mist of oil enters the lubrication rocking arm of rocking arm cavaera 11 valve assembly 6 by the passage 10 that oils inside crankshaft room, shakes Fraction oil gas in arm cavaera 11 enters tappet room 27 and cam chamber 32 lubricates tappet assembly 35 and cam pack 18, cam Air and mist of oil are mixed into Oil-gas Separation room 30 in room 32, and after separation, machine oil is temporarily stored in Oil-gas Separation room 30, waste gas drain chamber The waste gas containing a small amount of oil gas enters with fresh air after discarded flexible pipe 2 enters air filter 8 and burnt again in 31.

Engine primer side working condition directed downwardly is as shown in Figure 10, when engine start-up operation and piston stroking upward, Negative pressure is formed in crankshaft room 14, the check valve 23 of check valve 4 and first is closed, second and the 3rd check valve 16,26 open, accumulator 21 machine oil sucks oil suction oil duct 34 by oil absorption head 37 and oil suction flexible pipe 36 and enters crankshaft room 14, and machine oil operates in crankshaft high-speed When smash to form mist of oil and lubricate the parts such as piston component 12, crankshaft-link rod component 33;In suction function lower shake-changing arm cavaera 11 Interior most of oil gas is drawn into crankshaft room 14 by the first drainback passage 13;Fraction oil gas in rocking arm cavaera 11 enters Tappet room 27 and cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30, now, Oil-gas Separation room 30 in cam chamber 32 Refluxing opening be less than waste gas drain chamber 31 Waste gas outlet, after separation, machine oil passes through the drainback passage 25 of oil return hose 1 and the 3rd Into crankshaft room 14, the waste gas containing a small amount of oil gas is temporarily stored in waste gas drain chamber 31.When descent of piston, shape in crankshaft room 14 Into malleation, the check valve 23 of check valve 4 and first is opened, second and the 3rd check valve 16,26 close, mist of oil passes through inside crankshaft room The passage 10 that oils enters rocking arm cavaera 11 and lubricates rocking arm valve assembly 6, and the fraction oil gas in rocking arm cavaera 11, which enters, to be endured Bar room 27 and cam chamber 32 lubricate tappet assembly 35 and cam pack 18, and air and mist of oil are mixed into oil gas point in cam chamber 32 From room 30, after separation, machine oil is temporarily stored in Oil-gas Separation room 30, and the waste gas containing a small amount of oil gas is through discarded soft in waste gas drain chamber 31 Enter after the entrance air filter 8 of pipe 2 with fresh air and burn again.

It is described above, the simply specific embodiment of the invention, not the invention is made any formal Limitation, on the basis of the technical scheme of the invention is not departed from, made simple modification, equivalent variations or modification, falls Enter the protection domain of the invention.

Claims (5)

1. a kind of lubricating system of hand four stroke engine, include the accumulator of oil sump (20) and casing (17) composition (21), crankshaft room (14), cylinder block (15) and the rocking arm valve of cylinder head cover (9) composition of casing (17) and cylinder block (15) composition Room (11), cylinder block (15) and cam side cover (28) composition cam chamber (32), be attached to the tappet room of cylinder block (15) side (27), air filter (8), cylinder block (15) is interior to be provided with piston component (12), and crankshaft room (14) is provided with crankshaft-link rod component (33), shaken Arm cavaera (11) is provided with rocking arm valve assembly (6), and tappet room (27) are provided with tappet assembly (35), and cam chamber (32) is provided with cam Component (18), it is characterized in that:Accumulator (21) and bent axle are communicated with described casing (17) and crankshaft-link rod component (33) The oil suction oil duct (34) of room (14), crankshaft room (14) and rocking arm are communicated with casing (17), cylinder block (15) and cylinder head cover (9) The passage that oils (10) of cavaera (11), the import of the passage that oils (10) are provided with the first check valve (23), cylinder head cover (9), cylinder The first drainback passage (13) of body (15) and casing (17) provided with connecting rocker arm cavaera (11) with crankshaft room (14), first time Oily passage (13) is provided with the second check valve (16), and rocking arm cavaera (11) is connected by tappet room (27) with cam chamber (32), The second drainback passage (22) is provided between crankshaft room (14) and accumulator (21);Described cam side cover (28) and cam side cover plate (29) gas and oil separating plant is formed, gas and oil separating plant is connected with cam chamber (32), and the oil return of gas and oil separating plant separation passes through Return hose (1) and the 3rd drainback passage (25) being arranged in cylinder block (15) enter crankshaft room (14), the 3rd drainback passage (25) the 3rd check valve (26) is provided with, the waste gas of gas and oil separating plant separation is connected by waste gas flexible pipe (2) and air filter (8) Connect;Central dividing plate (41) is provided with the cavity of the cam side cover (28) and gas and oil separating plant is divided into Oil-gas Separation room (30) oil filter screen (38), Oil-gas Separation room (30) and waste gas row and waste gas drain chamber (31), are provided with Oil-gas Separation room (30) Put and waste gas discharge groove (42) is provided between room (31), Oil-gas Separation room (30) top is provided with the oil gas connected with cam chamber (32) Hole (39), bottom are provided with the oil return opening being connected with return hose (1), and oil return opening inner side is connected with the second suction by the second fuel sucking pipe Oil head, waste gas drain chamber (31) are provided with the Waste gas outlet being connected with waste gas flexible pipe (2);Oil-gas Separation room during normal condition (30) refluxing opening is below the Waste gas outlet of waste gas drain chamber (31);Air filter side down when Oil-gas Separation room (30) return Head piece is located on the left of the Waste gas outlet of waste gas drain chamber (31) and separated by central dividing plate (41);Silencer side down when oil gas The refluxing opening of separation chamber (30) and the Waste gas outlet of waste gas drain chamber (31) are on top, and oil return aperture (40) is in bottom;Stand upside down The refluxing opening of Oil-gas Separation room (30) is on top during work, and oil return aperture (40) is in bottom;Clutch side down when rocking arm valve The second oil absorption head (44) of room (11), tappet room (27) and cam chamber (32) all on lower section, Oil-gas Separation room (30) refluxing opening Less than the Waste gas outlet of waste gas drain chamber (31);Starter side down when Oil-gas Separation room (30) refluxing opening less than waste gas arrange Put the Waste gas outlet of room (31).
2. the lubricating system of hand four stroke engine according to claim 1, it is characterized in that:Described Oil-gas Separation Room (31) top is at least provided with an oil return stomata (40) connected with cam chamber (32), and the position of oil return stomata (40) is higher than oil Stomata (39).
3. the lubricating system of hand four stroke engine according to claim 1 or 2, it is characterized in that:The oil suction oil The import in road (34) is connected with oil absorption head (37) by oil suction flexible pipe (36).
4. the lubricating system of hand four stroke engine according to claim 3, it is characterized in that:The tappet room (27) The interior tappet coordinated with tappet assembly (35) that is provided with crosses set (24).
5. the lubricating system of hand four stroke engine according to claim 4, it is characterized in that:Described air filter (8) filter core (5) and gas-distribution pipe (7) are provided with, waste gas flexible pipe (2) is connected by check valve (4) with air filter (8).
CN201510912008.XA 2015-12-11 2015-12-11 The lubricating system of hand four stroke engine CN105332761B (en)

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CN202788976U (en) * 2012-06-15 2013-03-13 苏州科瓴精密机械科技有限公司 Four-stroke engine lubrication system
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CN104033205A (en) * 2014-06-09 2014-09-10 永康市威力园林机械有限公司 Lubricating system of handheld four-stroke engine
CN203906034U (en) * 2014-02-18 2014-10-29 苏州科瓴精密机械科技有限公司 Four-stroke engine
CN204163797U (en) * 2014-10-31 2015-02-18 苏州科瓴精密机械科技有限公司 The lubrication system of four stroke engine
CN205172671U (en) * 2015-12-11 2016-04-20 浙江中坚科技股份有限公司 Lubricating system of handheld four -stroke engine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201310396Y (en) * 2008-12-04 2009-09-16 昆山兴宝塑料制品有限公司 Lubricating system structure of four-stroke petrol engine
CN202370610U (en) * 2011-11-29 2012-08-08 星月集团有限公司 Handheld four-stroke engine lubricating system
CN202788976U (en) * 2012-06-15 2013-03-13 苏州科瓴精密机械科技有限公司 Four-stroke engine lubrication system
CN203321614U (en) * 2012-06-15 2013-12-04 苏州科瓴精密机械科技有限公司 Lubrication system of four-stroke engine
CN203906034U (en) * 2014-02-18 2014-10-29 苏州科瓴精密机械科技有限公司 Four-stroke engine
CN104033205A (en) * 2014-06-09 2014-09-10 永康市威力园林机械有限公司 Lubricating system of handheld four-stroke engine
CN204163797U (en) * 2014-10-31 2015-02-18 苏州科瓴精密机械科技有限公司 The lubrication system of four stroke engine
CN205172671U (en) * 2015-12-11 2016-04-20 浙江中坚科技股份有限公司 Lubricating system of handheld four -stroke engine

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