CN201310396Y - Lubricating system structure of four-stroke petrol engine - Google Patents
Lubricating system structure of four-stroke petrol engine Download PDFInfo
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- CN201310396Y CN201310396Y CNU2008200609607U CN200820060960U CN201310396Y CN 201310396 Y CN201310396 Y CN 201310396Y CN U2008200609607 U CNU2008200609607 U CN U2008200609607U CN 200820060960 U CN200820060960 U CN 200820060960U CN 201310396 Y CN201310396 Y CN 201310396Y
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- bent axle
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- crankshaft
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Abstract
The utility model discloses a lubricating system structure of a four-stroke petrol engine, which comprises a crankshaft case, a crankshaft, an air-inlet check valve, an air-outlet check valve and an oil-gas separating chamber, wherein the crankshaft is arranged on the crankshaft case chamber by a bearing, one end of the crankshaft is provided with a chamber winding the crankshaft, the crankshaft of the end is provided with a crankshaft ventilating hole, one end of the crankshaft ventilating hole is communicated with the chamber, the other end of the ventilating hole is communicated with the crankshaft case chamber, and the oil-gas separating chamber is communicated with a valve chamber by the air-inlet check valve, communicated with the chamber at one end of the crankshaft by the air-outlet check valve and finally communicated with the crankshaft case chamber. The oil-gas separating chamber is also provided with an air outlet communicated with the air. The utility model has the obvious advantages of novel design principle, simple technology, few parts, low cost and high reliability; the lubricating oil can not enter the oil-gas separating chamber in the whole process, the petrol engine can not stop or smoke in the condition of continuously working for more than 2 hours when turning over at 360 DEG, and the effect is obvious.
Description
Technical field
The utility model relates to a kind of gasoline engine lubricating system architecture, particularly relates to a kind of four-stroke gasoline engine lubrication system architecture.
Background technique
At present, extensive day by day to the application of small utility gasoline engine both at home and abroad, in many occasions, as: chain saw, shearing machine, military generator or the like, all require motor in 360 ° of scopes, any orientation is proper functioning effectively.But the problem that existing small utility gasoline engine exists is: fail effectively to solve the lubrication problem in 360 ° of scopes, machine oil enters the firing chamber and causes stopping working the repeated priming difficulty when being inverted.More typically can the lubrication system of the small utility gasoline engine of proper functioning have two kinds in 360 ° of scopes: a kind of is the disclosed lubrication system of Japan Patent, and this lubrication system main structure comprises oil chamber 4, disc 2, oil supply gallery 3, crankcase chamber 6, leaf valve 7, gear chamber 8, valve cage 9, drainback passage 1 and return tube 5 (structure is seen Fig. 1).In the engine running, the disc 2 that is installed on the bent axle stirs lubricant oil in the oil chamber 4, produces mist of oil; When piston stroking upward, the leaf valve 7 of crankcase chamber 6 bottoms is in closed condition, and the pressure of crankcase chamber 6 drops to the pressure less than oil chamber 4, i.e. P
Bent＜P
Valve, under differential pressure action, the mist of oil of oil chamber 6 sucks crankcase chamber 6 through the oil supply gallery on the bent axle 3; When descent of piston, the pressure of crankcase chamber 6 is increased to the pressure greater than oil chamber 4, i.e. P
Bent＞P
Tooth, leaf valve 7 is opened, and lubricant mist arrives valve cage 9 through gear chamber 8, and lubricant mist arrives the process of valve cage 9 from crankcase chamber 6, has successively lubricated parts such as connecting rod, bearing, piston, main bearing, gear, camshaft, valve, rocking arm.The flow process of its lubricant oil is: oil chamber's 4 → disc, 2 → oil supply gallery, 3 → crankcase chamber, 6 → connecting bar and crankshaft piston → leaf valve, 7 → gear chamber, 8 → gear camshaft → valve cage, 9 → valve rocker → drainback passage 1 → return tube 5 → oil chamber 4.
Another kind is the patent lubrication system of Chinese Tianjin Inst. of IC Engine design, and this lubrication system comprises oil chamber 27, eccentric stiffener 26, lubricating pump 24, fuel feeding oil duct 25, crankcase chamber 29, gear chamber 211, valve cage 212, mist of oil circulation canal 22, circulating pipe 28, upper end one-way valve 23, lower end one-way valve 210 and drainback passage 21 (its structure is seen Fig. 2); In the engine running, be installed in the lubricating pump 24 of eccentric stiffener 26 on the bent axle, lubricant oil through the oil supply gallery 25 in the crankcase chamber 29, is ejected on the gear of the connecting rod of crankcase chamber 29 and gear chamber 211, under the bump of gear, form mist of oil; When piston stroking upward, the lower end one-way valve 210 of mist of oil circulation canal 22 is in closed condition, and the pressure of crankcase chamber 29 drops to the pressure less than oil chamber 27, i.e. P
Bent＜P
Valve, under the effect of pressure reduction, the upper end one-way valve 23 of mist of oil circulation canal 22 is opened, and the lubricant oil and the mist of oil that are deposited in mist of oil circulation canal 22 flow back into oil chamber 27; When descent of piston, the upper end one-way valve 23 of mist of oil circulation canal 22 is in closed condition, and the pressure of crankcase chamber 29 is increased to the pressure greater than oil chamber 27, i.e. P
Bent＞P
ValveLubricant mist is opened, and the lower end one-way valve 210 of mist of oil circulation canal 22 arrives valve cage 212 through gear chamber 211, lubricant mist arrives the process of valve cage 212 from crankcase chamber 29, has successively lubricated parts such as connecting rod, bent axle, piston, gear, camshaft, valve, rocking arm; After lubricant mist arrives valve cage 212, wherein most flows back to oil chamber 27 through mist of oil circulation canal 22, and sub-fraction is after Oil-gas Separation, gather the drainback passage 21 of cylinder head cover, flow back to the mist of oil circulation canal 22 of crankcase chamber 29 by gravity, flow back to oil chamber 27 by mist of oil circulation canal 22 again.Its lubrication order is: oil chamber's 27 → eccentric stiffener, 26 → lubricating pump, 24 → oil supply gallery, 25 → crankcase chamber, 29 → connecting bar and crankshaft piston → lower end one-way valve 210 → gear chamber 211 → gear camshaft → valve cage 212 → valve rocker → mist of oil circulation canal 22.
The deficiency that the disclosed lubrication system of Japan Patent exists is: complex structure, and the cost height, reliability is low, the lubricant oil in the crankshaft room flows into the firing chamber easily; The deficiency that the disclosed lubrication system of Chinese patent exists is: Tianjin Inst. of IC Engine just increases some component on Japanese basis, makes structure complicated more like this.
The model utility content
Technical problem to be solved in the utility model provides a kind of four-stroke gasoline engine lubrication system architecture, and this is simple in structure, cost is low, reliable, can solve the deficiency that prior art exists.
For solving the problems of the technologies described above, four-stroke gasoline engine lubrication system architecture of the present utility model is characterized in that it comprises crankcase chamber, bent axle, breather check valve, outgassing nonreturn valve and Oil-gas Separation chamber; Bent axle, is provided with cavity around bent axle at an end of bent axle, and is provided with the bent axle vent on this end bent axle on crankcase by Bearing Installation, and an end of this bent axle vent communicates with cavity, and the other end communicates with crankcase chamber; To be the bent axle vent bend after the axis of bent axle extends to crank best mode, and communicate with crankcase chamber from the side exit of crank; The Oil-gas Separation chamber communicates with valve cage by breather check valve, communicates by the cavity of outgassing nonreturn valve with bent axle one end, and finally communicates with crankcase chamber, also is provided with the air outlet that communicates with air on the Oil-gas Separation chamber.
Working principle of the present utility model is: utilize descent of piston, make crankcase chamber produce pressure, impel the lubricating oil splash of crankcase chamber, this lubricant oil that splashes is broken under bent axle and motion of mechanism thereof, the pressure that produces when piston is descending once more impels broken lubricant oil promptly to atomize, then by the oil lubrication of atomizing to each position of body, thereby the purpose that reaches that lubricant oil atomizes and the motor associated components is lubricated.
Under engine working conditions, during descent of piston, the pressure of crankcase chamber rises to the pressure greater than the outgassing nonreturn valve place, i.e. P
Bent＞P
Go outThe time, outgassing nonreturn valve is opened, and crankcase chamber is given vent to anger by the bent axle vent rapidly, and the oil gas of at this moment taking out of enters the Oil-gas Separation chamber, and air is discharged from the air outlet on the Oil-gas Separation chamber, and machine oil is trapped in the Oil-gas Separation chamber.This moment, breather check valve was in closed condition, and breather check valve is opened and oil return when treating piston stroking upward.Its lubrication order is: initial descent of piston, crankcase chamber pressure increase → lubricating oil splash → bent axle and mechanical operation → broken lubricant oil; Piston is descending once more, and crankcase chamber pressure increase → lubricant oil atomizes fast → and breather check valve opens oil return.
Wherein, the breather check valve working principle is: it can only uniaxially from the Oil-gas Separation chamber to the valve cage air inlet, during piston stroking upward, crankcase chamber forms negative pressure, fresh air is opened and entered to breather check valve, utilize suction function that the lubricant oil that the Oil-gas Separation chamber left behind is drawn into crankcase chamber simultaneously, thereby reduce specific oil consumption.The outgassing nonreturn valve working principle is: it can only be given vent to anger to the Oil-gas Separation chamber from crankcase chamber by the bent axle vent by uniaxially, initial at descent of piston, because it is in closed condition, thereby can improve crankcase chamber pressure rapidly, lubricating oil splash is got up and atomize; But when entering normal working, when promptly the pressure of crankcase chamber reached certain pressure, outgassing nonreturn valve was opened, and the oil gas of crankcase chamber enters the Oil-gas Separation chamber from the bent axle vent, thereby reduced the pressure of crankcase chamber, in order to avoid wasted power.The inlet, outlet one-way valve adopts spherical one-way valve, and functional reliability is improved greatly, and sensitivity improves, and cost reduces.
The bent axle vent mainly is a ventilation usefulness, and when motor did not have work promptly not remain static, no matter motor is in what kind of position (as being inverted), owing to outgassing nonreturn valve is not opened, so the lubricant oil of crankcase chamber can not flow in the Oil-gas Separation chamber; And when engine operation, because the bent axle vent designs around crank, in the crankshaft rotating process, because action of centrifugal force, lubricant oil can not enter the Oil-gas Separation chamber yet.
Because employing said structure, the utility model are compared with prior art, its remarkable advantage is: adopt brand-new design principle, technology is simple, and component are few, and cost is low and reliability is high; Lubricant oil can not enter the Oil-gas Separation chamber all the time, does not stop working more than 2 hours, does not smolder through continuous operation when 360 ° of upsets, and effect is remarkable, therefore, has technically than much progress, can reach the effect of practical simplicity.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
Fig. 1 is the disclosed structural representation of Japan Patent in the prior art;
Fig. 2 is the disclosed structural representation of Chinese patent in the prior art;
Fig. 3 is the structural representation of the utility model one specific embodiment.
Wherein, in the above reference character, 1 drainback passage, 2 discs, 3 oil supply galleries, 4 oil chambers, 5 return tubes, 6 crankcase chamber, 7 leaf valves, 8 gear chamber, 9 valve cages, 21 drainback passages, 22 mist of oil circulation canals, 23 upper end one-way valves, 24 lubricating pumps, 25 oil supply galleries, 26 eccentric stiffeners, 27 oil chambers, 28 circulation canals, 29 crankcase chamber, 210 lower end one-way valves, 211 gear chamber, 212 valve cages, 31 crankcase chamber, 310 valve cages, 311 air outlets, 312 pistons, 313 connecting rods, 32 bent axles, 320 cranks, 33 breather check valves, 34 outgassing nonreturn valves, Oil- gas Separation chambers 35,36 bearings, 37 oil sealings, 38 cavitys, 39 bent axle vents.
Embodiment
For can clearer understanding technological means of the present utility model, and can be implemented, and for foregoing of the present utility model and other purpose, feature and advantage can be become apparent, especially exemplified by a preferred embodiment according to the content of specification, and conjunction with figs., be described in detail as follows.
As shown in Figure 3, four-stroke gasoline engine lubrication system architecture of the present utility model comprises crankcase chamber 31, bent axle 32, breather check valve 33, outgassing nonreturn valve 34 and Oil-gas Separation chamber 35; Bent axle 32 is installed on the crankcase chamber 31 by bearing 36, be provided with cavity 38 at an end of bent axle 32 around bent axle, and be provided with bent axle vent 39 on this end bent axle 32, an end of this bent axle vent 39 communicates with cavity 38, and the other end communicates with crankcase chamber 31; Oil-gas Separation chamber 35 communicates with valve cage 310 by breather check valve 33, communicates by the cavity 38 of outgassing nonreturn valve 34 with bent axle 32 1 ends, also is provided with the air outlet 311 that communicates with air on the Oil-gas Separation chamber 35.
Above-mentioned crankcase chamber 31 and bent axle 32 are basic identical with prior art, the two ends of bent axle 32 are installed on the crankcase chamber 31 by bearing 36, in crankcase chamber 31, there is a piston 312 to link to each other with bent axle 32 by connecting rod 313, under the driving of piston 312, bent axle 32 rotatablely moves, above the piston 312 be valve cage 310 below be the firing chamber of motor; In the left part of crankcase chamber 31 two oil sealings 37 being arranged is an annular housing 38 between around 32, two oil sealings 37 of bent axle, and this cavity 38 is bridges that crankcase chamber 31 is connected with Oil-gas Separation chamber 35; Bent axle 32 has a through hole near a side of cavity 38 along axis, the left side of this through hole radially bending makes through hole be communicated with cavity 38, the side of right side from crank 320 center curvatures to crank 320 makes through hole be communicated with crankcase chamber 31, and above-mentioned three sections through holes constitute bent axle vent 39; The Oil-gas Separation chamber 35 that is positioned at crankcase chamber 31 upper left sides is communicated with the valve cage 310 of motor by breather check valve 33 on the one hand, passes through outgassing nonreturn valve 34 on the other hand and is communicated with cavity 38 between two oil sealings 37; Wherein breather check valve 33 can only be to valve cage 310 air inlets, and outgassing nonreturn valve 34 can only be given vent to anger to Oil-gas Separation chamber 35, the one-way valve of inlet, outlet simultaneously 33, the 34 best one-way valves that adopt sphere.On the Oil-gas Separation chamber, also be provided with the air outlet 311 of leading to air.
Piston 312 is descending, make and produce pressure in the crankcase chamber 31, impel the lubricating oil splash in the crankcase chamber 31, this lubricant oil that splashes is broken under bent axle 32 and motion of mechanism thereof, the pressure that produces when piston 312 is descending once more impels broken lubricant oil to atomize rapidly, the lubricant oil of atomizing is Castor Oil each position to body, thus the purpose that reaches the lubricant oil atomizing and the motor associated components is lubricated; When piston 312 was descending, the pressure in the crankcase chamber 31 rose to the pressure greater than outgassing nonreturn valve 34 places, i.e. P
Bent＞P
Go outThe time, outgassing nonreturn valve 34 is opened, and crankcase chamber 31 is given vent to anger by bent axle vent 39 rapidly, and the oil gas of at this moment taking out of enters Oil-gas Separation chamber 35, and air is discharged from the air outlet 311 on the Oil-gas Separation chamber 35, and machine oil is trapped in the Oil-gas Separation chamber 35.This moment, breather check valve 33 was in closed condition, and breather check valve 33 is opened and oil return when treating that piston 312 is up.Its lubrication order is: initial piston 312 is descending, crankcase chamber 31 pressure increase → lubricating oil splash → bent axle 32 and mechanical operation → broken lubricant oil; Piston 312 is descending once more, and crankcase chamber 31 pressure increase → lubricant oil atomize fast → and breather check valve 33 opens oil return.
Wherein, breather check valve 33 can only uniaxially from Oil-gas Separation chamber 35 to valve cage 310 air inlets, when piston 312 is up, form negative pressure in the crankcase chamber 31, fresh air is opened and entered to breather check valve 33, the lubricant oil that utilizes suction function that Oil-gas Separation chamber 35 be left behind simultaneously is drawn in the crankcase chamber 31, thereby reduces specific oil consumption; Outgassing nonreturn valve 34 can only be given vent to anger to Oil-gas Separation chamber 35 from crankcase chamber 31 by bent axle vent 39 by uniaxially, descending initial of piston 312, because outgassing nonreturn valve 34 is in closed condition, thereby can improve the pressure of crankcase chamber 31 rapidly, lubricating oil splash is got up and atomize, but when entering normal working, be that pressure in the crankcase chamber 31 are when increasing to a certain degree, outgassing nonreturn valve 34 is opened, oil gas in the crankcase chamber 31 enters Oil-gas Separation chamber 35 from bent axle vent 39, thereby reduce the pressure in the crankcase chamber 31, in order to avoid wasted power.Inlet, outlet one- way valve 33,34 adopts spherical one-way valve, and functional reliability is improved greatly, and sensitivity improves, and cost reduces.
Bent axle vent 39 mainly is that ventilation is used, when motor does not have work promptly not remain static, no matter motor is in what kind of position (as being inverted), owing to outgassing nonreturn valve 34 is not opened, so the lubricant oil in the crankcase chamber 31 can not flow in the Oil-gas Separation chamber 35; And when engine operation, because bent axle vent 39 designs around crank 320, in bent axle 32 rotary courses, because action of centrifugal force, lubricant oil can not enter Oil-gas Separation chamber 35 yet.
In sum, the utility model adopts brand-new design principle, and technology is simple, component are few, and cost is low and reliability is high, and no matter whether engine operation, lubricant oil can not enter Oil-gas Separation chamber 35 all the time, and continuous operation is not stopped working more than 2 hours, do not smoldered when 360 ° of upsets, and effect is remarkable.
Claims (9)
1, a kind of four-stroke gasoline engine lubrication system architecture, comprise crankcase chamber (31), bent axle (32), Oil-gas Separation chamber (35) and valve cage (312), bent axle (32), piston (312) and connecting rod (313) are installed in this crankcase chamber (31), it is characterized in that:
One end of bent axle (32) is formed with a cavity around this bent axle (38), and is provided with bent axle vent (39) on this end bent axle (32), and an end of this bent axle vent (39) communicates with cavity (38), and the other end communicates with crankcase chamber (31).
2, four-stroke gasoline engine lubrication system architecture according to claim 1, it is characterized in that: bent axle vent (39) extends to back bending of crank (320) of bent axle (32) along the axis of bent axle (32), and communicates with crankcase chamber (31) from the side exit of crank (320).
3, four-stroke gasoline engine lubrication system architecture according to claim 1 and 2, it is characterized in that: Oil-gas Separation chamber (35) communicate with valve cage (310) by a breather check valve (33), Oil-gas Separation chamber (35) communicates with the cavity (38) of bent axle (32) one ends by an outgassing nonreturn valve (34), and communicates with crankcase chamber (31) by bent axle vent (39).
4, four-stroke gasoline engine lubrication system architecture according to claim 1, it is characterized in that: bent axle vent (39) extends to crank (320) the back bending of bent axle (32) along the axis of bent axle (32), and communicate with crankcase chamber (31) from the side exit of crank (320), Oil-gas Separation chamber (35) communicates with valve cage (310) by a breather check valve (33), and Oil-gas Separation chamber (35) communicate with the cavity (38) of bent axle (32) one ends by an outgassing nonreturn valve (34).
5, four-stroke gasoline engine lubrication system according to claim 1 is characterized in that: Oil-gas Separation chamber (35) are provided with the air outlet (311) that communicates with air.
6, four-stroke gasoline engine lubrication system architecture according to claim 1 is characterized in that: cavity (38) forms by oil sealing (37) isolation.
7, four-stroke gasoline engine lubrication system architecture according to claim 1 is characterized in that: bent axle (32) is installed on this crankcase chamber (31) by bearing (36).
8, four-stroke gasoline engine lubrication system architecture according to claim 3 is characterized in that: breather check valve (33) and outgassing nonreturn valve (34) adopt spherical one-way valve.
9, four-stroke gasoline engine lubrication system architecture according to claim 4 is characterized in that: breather check valve (33) and outgassing nonreturn valve (34) adopt spherical one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200609607U CN201310396Y (en) | 2008-12-04 | 2008-12-04 | Lubricating system structure of four-stroke petrol engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200609607U CN201310396Y (en) | 2008-12-04 | 2008-12-04 | Lubricating system structure of four-stroke petrol engine |
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| Publication Number | Publication Date |
|---|---|
| CN201310396Y true CN201310396Y (en) | 2009-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200609607U Expired - Fee Related CN201310396Y (en) | 2008-12-04 | 2008-12-04 | Lubricating system structure of four-stroke petrol engine |
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| CN (1) | CN201310396Y (en) |
Cited By (2)
| 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 |
| CN111608761A (en) * | 2020-06-02 | 2020-09-01 | 四川省天域航通科技有限公司 | Large-scale freight transportation unmanned aerial vehicle system of lubricating oil |
-
2008
- 2008-12-04 CN CNU2008200609607U patent/CN201310396Y/en not_active Expired - Fee Related
Cited By (3)
| 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 |
| CN111608761A (en) * | 2020-06-02 | 2020-09-01 | 四川省天域航通科技有限公司 | Large-scale freight transportation unmanned aerial vehicle system of lubricating oil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20111204 |