CN205172671U - Lubricating system of handheld four -stroke engine - Google Patents

Lubricating system of handheld four -stroke engine Download PDF

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Publication number
CN205172671U
CN205172671U CN201521023960.6U CN201521023960U CN205172671U CN 205172671 U CN205172671 U CN 205172671U CN 201521023960 U CN201521023960 U CN 201521023960U CN 205172671 U CN205172671 U CN 205172671U
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CN
China
Prior art keywords
oil
room
gas
crankshaft
tappet
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CN201521023960.6U
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Chinese (zh)
Inventor
王浦亮
胡寿仁
张力
徐明智
周彪
吴潘浩
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ZHEJIANG ZHONGJIAN TECHNOLOGY Co Ltd
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ZHEJIANG ZHONGJIAN TECHNOLOGY Co Ltd
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Priority to CN201521023960.6U priority Critical patent/CN205172671U/en
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Publication of CN205172671U publication Critical patent/CN205172671U/en
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Abstract

The utility model discloses a lubricating system of handheld four -stroke engine, including accumulator (21), bent axle room (14), rocking arm valve chamber (11), cam room (32), tappet room (27), oil -gas separation device, box (17) and crankshaft connecting rod assembly (33) on be equipped with the intercommunication accumulator (21) and oil absorption oil duct (34) of bent axle room (14), box (17), the passageway that oils (10) that are equipped with intercommunication bent axle room (14) and rocking arm valve chamber (11) through first check valve (23) are gone up to cylinder block (15) and cylinder end lid (9), cylinder end lid (9), cylinder block (15) and box (17) are gone up and are equipped with a return path (13) of connecting rocking arm valve chamber (11) and bent axle room (14) through second check valve (16), be equipped with the 3rd return path (25) through third check valve (26) between oil -gas separation device and bent axle room (14). After adopting this above -mentioned structure, have that simple structure compactness, lubricating efficiency are high, effectual, the arbitrary gesture of oil -gas separation can both normal operating etc. Characteristics.

Description

The lubrication system of hand four stroke engine
Technical field
The utility model relates to a kind of hand four stroke engine, particularly the lubrication system of hand four stroke engine that can run of a kind of any attitude.
Background technique
Along with the development of society and the progress of science and technology, various garden instrument and small agricultural mechanism be constantly transition and upgrade and update also, miniature gasoline engine demand in gardens and agricultural etc. constantly promotes, in the market or based on can the two stroke engine of any direction work, but along with environmental problem is increasingly serious, emission request improves constantly, and hand four stroke engine will inevitably replace two stroke engine afterwards.
Hand four stroke engine in use, there will be the following aspects problem: one be motor operationally, ensure that each running component such as crankshaft & connecting, distribution device are reliable, must ensure that each works has sufficient oil to ensure lubrication, but lubrication system is in each works at present, lubrication is not very desirable; Two be motor in arbitrary overturn working procedure, the lubrication of each running component that do not have a good guarantee, or there will be machine oil and cause burn oil phenomenon along with gas together enters air filter, thus affect the working efficiency of machine.At present, on market more or less all there is above-mentioned defect in product.For this reason, many manufacturers and knowledgeable people are studied for the problems referred to above and develop, but not yet have more rational product to emerge so far.
Summary of the invention
For overcoming the above-mentioned defect that prior art exists, the purpose of this utility model is to provide a kind of lubrication system of simple and compact for structure, oil duct is arranged rationally, lubricating efficiency is high, good oil gas separation effect, motor can normally run at any attitude hand four stroke engine.
The utility model solves the problems of the technologies described above adopted technological scheme, comprise the accumulator that oil sump and casing form, the crankshaft room that casing and cylinder block form, the rocking arm valve cage that cylinder block and cylinder head cover form, the cam chamber that cylinder block and cam side cover form, be attached to the tappet room of cylinder block side, air filter, piston assembly is provided with in cylinder block, crankshaft room is provided with crankshaft-link rod assembly, rocking arm valve cage is provided with rocking arm valve assembly, tappet room is provided with tappet assembly, cam chamber is provided with cam pack, described casing and crankshaft-link rod assembly are provided with the oil suction oil duct being communicated with accumulator and crankshaft room, casing, cylinder block and cylinder head cover are provided with the passage that oils being communicated with crankshaft room and rocking arm valve cage, the import of passage of oiling is provided with the first one-way valve, cylinder head cover, cylinder block and casing are provided with the first drainback passage of connecting rocker arm valve cage and crankshaft room, first drainback passage is provided with the second one-way valve, rocking arm valve cage is communicated with cam chamber by tappet room, the second drainback passage is provided with between crankshaft room and accumulator.
The further scheme of the utility model, described cam side cover and cam side cover plate form gas and oil separating plant, gas and oil separating plant is connected with cam chamber, the oil return that gas and oil separating plant is separated enters crankshaft room by return hose and the 3rd drainback passage be arranged in cylinder block, 3rd drainback passage is provided with the 3rd one-way valve, and the waste gas that gas and oil separating plant is separated is connected with air filter by waste gas flexible pipe.
The further scheme of the utility model, be provided with intermediate clapboard in the cavity of described cam side cover and gas and oil separating plant is divided into Oil-gas Separation room and toxic emission room, Oil-gas Separation indoor are provided with oil filter screen, be provided with waste gas between Oil-gas Separation room and toxic emission room and discharge groove, top, Oil-gas Separation room is provided with the oil-gas hole be communicated with cam chamber, bottom is provided with the return opening be connected with return hose, and toxic emission room is provided with the Waste gas outlet be connected with waste gas flexible pipe; During normal state, the refluxing opening of Oil-gas Separation room is below the Waste gas outlet of toxic emission room; Air filter side down time Oil-gas Separation room refluxing opening be positioned at toxic emission room Waste gas outlet on the left of and separated by intermediate clapboard; Silencing apparatus side down time the refluxing opening of Oil-gas Separation room and the Waste gas outlet of toxic emission room on top, oil return aperture is in bottom; During handstand work, the refluxing opening of Oil-gas Separation room is on top, and oil return aperture is in bottom; Clutch side down time rocking arm valve cage, tappet room and cam chamber all in below, the second oil absorption head on the refluxing opening of Oil-gas Separation room is lower than the Waste gas outlet of toxic emission room; Starter side down time Oil-gas Separation room refluxing opening lower than the Waste gas outlet of toxic emission room.
The further scheme of the utility model, described top, Oil-gas Separation room is at least provided with an oil return aperture be communicated with cam chamber, and the position of oil return aperture is higher than oil-gas hole.
The further scheme of the utility model, the import of described oil suction oil duct is connected with oil absorption head by oil suction flexible pipe.
The further scheme of the utility model, described tappet indoor are provided with the tappet coordinated with tappet assembly and cross cover.
The further scheme of the utility model, is provided with filter core and gas-distribution pipe in described air filter, waste gas flexible pipe is connected with air filter by one-way valve.
After adopting said structure, compared with prior art have the following advantages and effect: one is because casing and crankshaft-link rod assembly are provided with the oil suction oil duct being communicated with accumulator and crankshaft room, the import of oil suction oil duct connects oil absorption head by oil suction flexible pipe, make motor can suck machine oil from accumulator in any operating attitude, machine oil smashes atomization and lube pistons assembly in crankshaft high-speed running, the parts such as crankshaft-link rod assembly, the oil gas of atomization is through casing, the passage lubrication rocking arm valve assembly that oils on cylinder block and cylinder head cover, major part oil gas is through cylinder head cover, the first drainback passage on cylinder block and casing gets back to crankshaft room, the tappet assembly of fraction oil-air lubrication tappet room and the cam pack of cam chamber, effectively ensure that each moving element can obtain sufficient lubrication, high lubricating effect, efficiency is high.Two is that the oil gas of cam chamber enters gas and oil separating plant, due to be provided with in gas and oil separating plant meet motor can by the Oil-gas Separation room of Oil-gas Separation at any attitude, good oil gas separation effect, lubrication oil consumption is low, to ensure that motor is at any attitude reliably working.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is sectional view of the present utility model.
Fig. 3 is the structural representation of the utility model cam side cover.
Fig. 4 is cylinder head cover structural representation of the present utility model.
Fig. 5 is the A-A sectional view of the utility model Fig. 4.
Fig. 6 is the structural representation of the utility model air filter when working down.
Fig. 7 is the structural representation of the utility model silencing apparatus when working down.
Structural representation when Fig. 8 is the utility model inversion work.
Fig. 9 is the structural representation of the utility model clutch mechanism when working down.
Figure 10 is the structural representation of the utility model starter mechanism when working down.
Wherein 1 oil return hose, 2 waste gas flexible pipes, 3 fuel tanks, 4 one-way valves, 5 filter cores, 6 rocking arm valve assemblies, 7 gas-distribution pipes, 8 air filters, 9 cylinder head covers, 10 oil passage, 11 rocking arm valve cages, 12 piston assemblys, 13 first drainback passages, 14 crankshaft room, 15 cylinder block, 16 second one-way valves, 17 casings, 18 cam packs, 19 machine oil mouths, 20 oil sumps, 21 accumulators, 22 second drainback passages, 23 first one-way valves, cover crossed by 24 tappets, 25 the 3rd drainback passages, 26 the 3rd one-way valves, 27 tappet rooms, 28 cam side covers, 29 cam side cover plates, 30 Oil-gas Separation rooms, 31 toxic emission rooms, 32 cam chambers, 33 crankshaft-link rod assemblies, 34 oil suction oil ducts, 35 tappet assemblies, 36 oil suction flexible pipes, 37 oil absorption heads, 38 oil filter screens, 39 oil-gas holes, 40 oil return apertures, 41 intermediate clapboards, 42 waste gas discharge groove, 43 second oil suction flexible pipes, 44 second oil absorption heads.
Embodiment
Shown in Fig. 1 to Fig. 5, for the specific embodiments of the lubrication system of a kind of hand four stroke engine of the utility model, it comprises the accumulator 21 that oil sump 20 forms with casing 17, the crankshaft room 14 that casing 17 and cylinder block 15 form, the rocking arm valve cage 11 that cylinder block 15 and cylinder head cover 9 form, the cam chamber 32 that cylinder block 15 and cam side cover 28 form, be attached to the tappet room 27 of cylinder block 15 side, air filter 8, fuel tank 3, oil sump 20 is connected with machine oil mouth 19, piston assembly 12 is provided with in cylinder block 15, crankshaft room 14 is provided with crankshaft-link rod assembly 33, rocking arm valve cage 11 is provided with rocking arm valve assembly 6, tappet room 27 is provided with tappet assembly 35, cam chamber 32 is provided with cam pack 18, described casing 17 and crankshaft-link rod assembly 33 are provided with the oil suction oil duct 34 being communicated with accumulator 21 and crankshaft room 14, the import of described oil suction oil duct 34 is connected with oil absorption head 37 by oil suction flexible pipe 36, casing 17, cylinder block 15 and cylinder head cover 9 are provided with the path 10 that oils being communicated with crankshaft room 14 and rocking arm valve cage 11, the import of path 10 of oiling is provided with the first one-way valve 23, cylinder head cover 9, cylinder block 15 and casing 17 are provided with the first drainback passage 13 of connecting rocker arm valve cage 11 and crankshaft room 14, first drainback passage 13 is provided with the second one-way valve 16, rocking arm valve cage 11 is communicated with cam chamber 32 by tappet room 27, the second drainback passage 22 is provided with between crankshaft room 14 and accumulator 21.
In order to be separated the oil gas in cam chamber 32, described cam side cover 28 forms gas and oil separating plant with cam side cover plate 29, gas and oil separating plant is connected with cam chamber 32, the oil return that gas and oil separating plant is separated enters crankshaft room 14 by return hose 1 and the 3rd drainback passage 25 be arranged in cylinder block 15,3rd drainback passage 25 is provided with the 3rd one-way valve 26, and the waste gas that gas and oil separating plant is separated is connected with air filter 8 by waste gas flexible pipe 2.Be provided with intermediate clapboard 41 in the cavity of described cam side cover 28 and gas and oil separating plant is divided into Oil-gas Separation room 30 and toxic emission room 31, oil filter screen 38 is provided with in Oil-gas Separation room 30, be provided with waste gas between Oil-gas Separation room 30 and toxic emission room 31 and discharge groove 42, top, Oil-gas Separation room 30 is provided with the oil-gas hole 39 be communicated with cam chamber 32, bottom is provided with the return opening be connected with return hose 1, and toxic emission room 31 is provided with the Waste gas outlet be connected with waste gas flexible pipe 2.Described top, Oil-gas Separation room 30 is at least provided with an oil return aperture 40 be communicated with cam chamber 32, and the position of oil return aperture 40 is higher than oil-gas hole 39.Be provided with filter core 5 and gas-distribution pipe 7 in described air filter 8, waste gas flexible pipe 2 is connected with air filter 8 by one-way valve 4.
In order to effectively control the oil gas by tappet room 27, being provided with the tappet coordinated with tappet assembly 35 in described tappet room 27 and crossing cover 24.
Engine work state of the present utility model is as shown in Fig. 1 to 5, when motor start working and piston stroking upward time, negative pressure is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are closed, second and the 3rd one-way valve 16,26 open, the machine oil of accumulator 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 smashes when crankshaft high-speed operates and forms mist of oil and the parts such as lube pistons assembly 12, crankshaft-link rod assembly 33; Most of oil gas in suction function lower shake-changing arm valve cage 11 is drawn into crankshaft room 14 through the first drainback passage 13; Fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32, in cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30, now, the refluxing opening of Oil-gas Separation room 30 is below the Waste gas outlet of toxic emission room 31, after separation, machine oil enters crankshaft room 14 by oil return hose 1 and the 3rd drainback passage 25, and the waste gas containing a small amount of oil gas is temporarily stored in toxic emission room 31.When descent of piston, malleation is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are opened, second and the 3rd one-way valve 16, 26 close, the inner mist of oil of crankshaft room enters rocking arm valve cage 11 by the path 10 that oils and lubricates rocking arm valve assembly 6, fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32 lubricates tappet assembly 35 and cam pack 18, in cam chamber 32, air and mist of oil are mixed into Oil-gas Separation room 30, after separation, machine oil is temporarily stored in Oil-gas Separation room 30, waste gas containing a small amount of oil gas in toxic emission room 31 enters with fresh air and again burns after discarded flexible pipe 2 enters air filter 8.When after engine stop work, in rocking arm valve cage 11, residual machine oil flows into tappet room 27, enters cam chamber 32, returns in accumulator 21 finally by the second drainback passage 22.
Air filter of engine 8 side working state down as shown in Figure 6, when motor start working and piston stroking upward time, negative pressure is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are closed, second and the 3rd one-way valve 16,26 open, the machine oil of accumulator 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 smashes when crankshaft high-speed operates and forms mist of oil and the parts such as lube pistons assembly 12, crankshaft-link rod assembly 33; Most of oil gas in suction function lower shake-changing arm valve cage 11 is drawn into crankshaft room 14 through the first drainback passage 13; Fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32, in cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30, separated by intermediate clapboard 41 on the left of the Waste gas outlet that the refluxing opening of Oil-gas Separation room 30 is positioned at toxic emission room 31, after separation, machine oil enters crankshaft room 14 by oil return hose 1 and the 3rd drainback passage 25, and the waste gas containing a small amount of oil gas is temporarily stored in toxic emission room 31.When descent of piston, malleation is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are opened, second and the 3rd one-way valve 16, 26 close, the inner mist of oil of crankshaft room enters rocking arm valve cage 11 by the path 10 that oils and lubricates rocking arm valve assembly 6, fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32 lubricates tappet assembly 35 and cam pack 18, in cam chamber 32, air and mist of oil are mixed into Oil-gas Separation room 30, after separation, machine oil is temporarily stored in Oil-gas Separation room 30, waste gas containing a small amount of oil gas in toxic emission room 31 enters with fresh air and again burns after discarded flexible pipe 2 enters air filter 8.
Muffler for motor side working state down as shown in Figure 7, when motor start working and piston stroking upward time, negative pressure is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are closed, second and the 3rd one-way valve 16,26 open, the machine oil of accumulator 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 smashes when crankshaft high-speed operates and forms mist of oil and the parts such as lube pistons assembly 12, crankshaft-link rod assembly 33; Most of oil gas in suction function lower shake-changing arm valve cage 11 is drawn into crankshaft room 14 through the first drainback passage 13; Fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32, in cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30, now the refluxing opening of Oil-gas Separation room 30 and the Waste gas outlet of toxic emission room 31 are on top, oil return aperture 40 is in bottom, after separation, machine oil directly flows back to cam chamber 32 by oil return aperture 40, then enters accumulator 21 from cam chamber 32, and the waste gas containing a small amount of oil gas is temporarily stored in toxic emission room 31.When descent of piston, malleation is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are opened, second and the 3rd one-way valve 16, 26 close, the inner mist of oil of crankshaft room enters rocking arm valve cage 11 by the path 10 that oils and lubricates rocking arm valve assembly 6, fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32 lubricates tappet assembly 35 and cam pack 18, in cam chamber 32, air and mist of oil are mixed into Oil-gas Separation room 30, after separation, machine oil flows back to cam chamber 32 by oil return aperture 40, accumulator 21 is entered again from cam chamber 32, waste gas containing a small amount of oil gas in toxic emission room 31 enters with fresh air and again burns after discarded flexible pipe 2 enters air filter 8.
Motor handstand working state as shown in Figure 8, when motor start working and piston stroking upward time, negative pressure is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are closed, second and the 3rd one-way valve 16,26 open, the machine oil of accumulator 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 smashes when crankshaft high-speed operates and forms mist of oil and the parts such as lube pistons assembly 12, crankshaft-link rod assembly 33; Most of oil gas in suction function lower shake-changing arm valve cage 11 is drawn into crankshaft room 14 through the first drainback passage 13; Fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32, in cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30, now, the refluxing opening of Oil-gas Separation room 30 is on top, oil return aperture 40 is in bottom, and after separation, machine oil directly flows back to cam chamber 32 by oil return aperture 40, enter accumulator 21 from cam chamber 32 again, the waste gas containing a small amount of oil gas is temporarily stored in toxic emission room 31.When descent of piston, malleation is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are opened, second and the 3rd one-way valve 16, 26 close, the inner mist of oil of crankshaft room enters rocking arm valve cage 11 by the path 10 that oils and lubricates rocking arm valve assembly 6, fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32 lubricates tappet assembly 35 and cam pack 18, in cam chamber 32, air and mist of oil are mixed into Oil-gas Separation room 30, after separation, machine oil flows back to cam chamber 32 by oil return aperture 40, accumulator 21 is entered again from cam chamber 32, waste gas containing a small amount of oil gas in toxic emission room 31 enters with fresh air and again burns after discarded flexible pipe 2 enters air filter 8.
Engine clutch side working state down as shown in Figure 9, when motor start working and piston stroking upward time, negative pressure is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are closed, second and the 3rd one-way valve 16,26 open, the machine oil of accumulator 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 smashes when crankshaft high-speed operates and forms mist of oil and the parts such as lube pistons assembly 12, crankshaft-link rod assembly 33, most of oil gas in suction function lower shake-changing arm valve cage 11 is drawn into crankshaft room 14 through the first drainback passage 13, fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32, in cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30, now, rocking arm valve cage 11, tappet room 27 and cam chamber 32 are all in below, the second oil absorption head 44 on the refluxing opening of Oil-gas Separation room 30 is lower than the Waste gas outlet of toxic emission room 31, the machine oil of rocking arm valve cage 11 and tappet room 27 flows into accumulator 21 by cam chamber 32, after separation, machine oil enters crankshaft room 14 by oil return hose 1 and the 3rd drainback passage 25, waste gas containing a small amount of oil gas is temporarily stored in toxic emission room 31.When descent of piston, malleation is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are opened, second and the 3rd one-way valve 16, 26 close, the inner mist of oil of crankshaft room enters rocking arm valve cage 11 by the path 10 that oils and lubricates rocking arm valve assembly 6, fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32 lubricates tappet assembly 35 and cam pack 18, in cam chamber 32, air and mist of oil are mixed into Oil-gas Separation room 30, after separation, machine oil is temporarily stored in Oil-gas Separation room 30, waste gas containing a small amount of oil gas in toxic emission room 31 enters with fresh air and again burns after discarded flexible pipe 2 enters air filter 8.
Engine primer side working state down as shown in Figure 10, when motor start working and piston stroking upward time, negative pressure is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are closed, second and the 3rd one-way valve 16,26 open, the machine oil of accumulator 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 smashes when crankshaft high-speed operates and forms mist of oil and the parts such as lube pistons assembly 12, crankshaft-link rod assembly 33; Most of oil gas in suction function lower shake-changing arm valve cage 11 is drawn into crankshaft room 14 through the first drainback passage 13; Fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32, in cam chamber 32, air and air-fuel mixture enter Oil-gas Separation room 30, now, the refluxing opening of Oil-gas Separation room 30 is lower than the Waste gas outlet of toxic emission room 31, after separation, machine oil enters crankshaft room 14 by oil return hose 1 and the 3rd drainback passage 25, and the waste gas containing a small amount of oil gas is temporarily stored in toxic emission room 31.When descent of piston, malleation is formed in crankshaft room 14, one-way valve 4 and the first one-way valve 23 are opened, second and the 3rd one-way valve 16, 26 close, the inner mist of oil of crankshaft room enters rocking arm valve cage 11 by the path 10 that oils and lubricates rocking arm valve assembly 6, fraction oil gas in rocking arm valve cage 11 enters tappet room 27 and cam chamber 32 lubricates tappet assembly 35 and cam pack 18, in cam chamber 32, air and mist of oil are mixed into Oil-gas Separation room 30, after separation, machine oil is temporarily stored in Oil-gas Separation room 30, waste gas containing a small amount of oil gas in toxic emission room 31 enters with fresh air and again burns after discarded flexible pipe 2 enters air filter 8.
The above; just specific embodiment of the utility model, not makes any pro forma restriction to the utility model, is not departing from the technical solution of the utility model basis; done simple modification, equivalent variations or modification, all fall into protection domain of the present utility model.

Claims (7)

1. the lubrication system of a hand four stroke engine, comprise the accumulator (21) that oil sump (20) forms with casing (17), the crankshaft room (14) that casing (17) and cylinder block (15) form, the rocking arm valve cage (11) that cylinder block (15) and cylinder head cover (9) form, the cam chamber (32) that cylinder block (15) and cam side cover (28) form, be attached to the tappet room (27) of cylinder block (15) side, air filter (8), piston assembly (12) is provided with in cylinder block (15), crankshaft room (14) is provided with crankshaft-link rod assembly (33), rocking arm valve cage (11) is provided with rocking arm valve assembly (6), tappet room (27) is provided with tappet assembly (35), cam chamber (32) is provided with cam pack (18), it is characterized by: described casing (17) and crankshaft-link rod assembly (33) are provided with the oil suction oil duct (34) being communicated with accumulator (21) and crankshaft room (14), casing (17), cylinder block (15) and cylinder head cover (9) are provided with the passage that oils (10) being communicated with crankshaft room (14) and rocking arm valve cage (11), the import of passage (10) of oiling is provided with the first one-way valve (23), cylinder head cover (9), cylinder block (15) and casing (17) are provided with first drainback passage (13) of connecting rocker arm valve cage (11) and crankshaft room (14), first drainback passage (13) is provided with the second one-way valve (16), rocking arm valve cage (11) is communicated with cam chamber (32) by tappet room (27), the second drainback passage (22) is provided with between crankshaft room (14) and accumulator (21).
2. the lubrication system of hand four stroke engine according to claim 1, it is characterized in that: described cam side cover (28) and cam side cover plate (29) form gas and oil separating plant, gas and oil separating plant is connected with cam chamber (32), the oil return that gas and oil separating plant is separated enters crankshaft room (14) by return hose (1) and the 3rd drainback passage (25) be arranged in cylinder block (15), 3rd drainback passage (25) is provided with the 3rd one-way valve (26), the waste gas that gas and oil separating plant is separated is connected with air filter (8) by waste gas flexible pipe (2).
3. the lubrication system of hand four stroke engine according to claim 2, it is characterized in that: be provided with intermediate clapboard (41) in the cavity of described cam side cover (28) and gas and oil separating plant is divided into Oil-gas Separation room (30) and toxic emission room (31), oil filter screen (38) is provided with in Oil-gas Separation room (30), be provided with waste gas between Oil-gas Separation room (30) and toxic emission room (31) and discharge groove (42), Oil-gas Separation room (30) top is provided with the oil-gas hole (39) be communicated with cam chamber (32), bottom is provided with the return opening be connected with return hose (1), the second oil absorption head is connected with by the second fuel sucking pipe inside return opening, toxic emission room (31) is provided with the Waste gas outlet be connected with waste gas flexible pipe (2), during normal state, the refluxing opening of Oil-gas Separation room (30) is below the Waste gas outlet of toxic emission room (31), air filter side down time Oil-gas Separation room (30) refluxing opening be positioned at toxic emission room (31) Waste gas outlet on the left of and separated by intermediate clapboard (41), silencing apparatus side down time Oil-gas Separation room (30) refluxing opening and the Waste gas outlet of toxic emission room (31) on top, oil return aperture (40) is in bottom, during handstand work, the refluxing opening of Oil-gas Separation room (30) is on top, and oil return aperture (40) is in bottom, clutch side down time rocking arm valve cage (11), tappet room (27) and cam chamber (32) all in below, the second oil absorption head (44) on Oil-gas Separation room (30) refluxing opening is lower than the Waste gas outlet of toxic emission room (31), starter side down time Oil-gas Separation room (30) refluxing opening lower than the Waste gas outlet of toxic emission room (31).
4. the lubrication system of hand four stroke engine according to claim 3, it is characterized in that: described Oil-gas Separation room (30) top is at least provided with an oil return aperture (40) be communicated with cam chamber (32), and the position of oil return aperture (40) is higher than oil-gas hole (39).
5. the lubrication system of the hand four stroke engine according to any one of claim 4, is characterized in that: the import of described oil suction oil duct (34) is connected with oil absorption head (37) by oil suction flexible pipe (36).
6. the lubrication system of hand four stroke engine according to claim 5, is characterized in that: be provided with the tappet coordinated with tappet assembly (35) in described tappet room (27) and cross and overlap (24).
7. the lubrication system of hand four stroke engine according to claim 6, it is characterized in that: be provided with filter core (5) and gas-distribution pipe (7) in described air filter (8), waste gas flexible pipe (2) is connected with air filter (8) by one-way valve (4).
CN201521023960.6U 2015-12-11 2015-12-11 Lubricating system of handheld four -stroke engine Withdrawn - After Issue CN205172671U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521023960.6U CN205172671U (en) 2015-12-11 2015-12-11 Lubricating system of handheld four -stroke engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521023960.6U CN205172671U (en) 2015-12-11 2015-12-11 Lubricating system of handheld four -stroke engine

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Publication Number Publication Date
CN205172671U true CN205172671U (en) 2016-04-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105332761A (en) * 2015-12-11 2016-02-17 浙江中坚科技股份有限公司 Handheld lubrication system for four-stroke engine
CN111271175A (en) * 2020-02-10 2020-06-12 永康市兴虎动力机械有限公司 Portable four-stroke gasoline engine of hand-held type multipurpose

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105332761A (en) * 2015-12-11 2016-02-17 浙江中坚科技股份有限公司 Handheld lubrication system for four-stroke engine
CN105332761B (en) * 2015-12-11 2018-03-20 浙江中坚科技股份有限公司 The lubricating system of hand four stroke engine
CN111271175A (en) * 2020-02-10 2020-06-12 永康市兴虎动力机械有限公司 Portable four-stroke gasoline engine of hand-held type multipurpose

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