CN204163797U - The lubrication system of four stroke engine - Google Patents
The lubrication system of four stroke engine Download PDFInfo
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- CN204163797U CN204163797U CN201420645063.8U CN201420645063U CN204163797U CN 204163797 U CN204163797 U CN 204163797U CN 201420645063 U CN201420645063 U CN 201420645063U CN 204163797 U CN204163797 U CN 204163797U
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Abstract
The utility model discloses a kind of lubrication system of four stroke engine, and described four stroke engine comprises: food tray, for storing lubricant oil; Crankshaft room; Cam chamber; Rocker arm chamber; And distributor chamber, it is connected with fuel tank and for gas mixture is separated into mist of oil and fluid oil; Described lubrication system comprises: food tray is communicated with by oil supply gallery with crankcase, and in oil supply gallery, arrange the first one-way valve; Crankcase is communicated with by the first oil transportation channel with distributor chamber, and arranges the second one-way valve in the first oil transportation channel; Cam chamber is communicated with by the second oil transportation channel with rocker arm chamber; And rocker arm chamber is communicated with by least one drainback passage with crankcase, and the 3rd one-way valve is set in drainback passage; Described distributor chamber comprises oil outlet, and this oil outlet is arranged on the end face of distributor chamber, and lubricant oil is entered in cam chamber by this oil outlet, thus can reduce the consumption of lubricant oil.
Description
Technical field
The utility model relates to a kind of lubrication system of four stroke engine.
Background technique
Take vegetation as hand-held shears for lawns (cut-off machine) and the Backpack work machine of object, this type of motor that is portable or Backpack work machine widely uses traditional two-stroke and four-stroke small-sized universal engine.But because two stroke engine can produce a lot of pollution, under the more and more stricter social background that pollutant emission regulation becomes, the demand that driving source is replaced by four stroke engine from two-stroke is improved day by day.But four stroke engine has more complicated lubrication system, cause motor unconspicuous shortcoming of lubrication effect when running with angle of inclination, therefore, lubrication becomes the problem of each motor manufacturer major design.
At present, a Authorization Notice No. is the system for producing lubricating oil mist that the patent document of CN 1080817C discloses in a kind of motor, its any working position adopting the simple disc of structure to make at motor, effectively can spatter the lubricant oil sent out in oil storage cavity, wherein disc comprises one and is assemblied in bent axle or axle sleeve on the work running shaft that is connected with bent axle, stretch out two from this axle sleeve and spatter foliation sheet, lubricant oil in oil storage cavity can spatter only by two to be sent out a sheet and is effectively spattered and send out, thus forms good mist of oil.But prove to exist too wide, too heavy by the motor of this this patent patten's design, the deficiency that cost is too high in actual applications.The US6213079 of FUJIROBIN shows with comparatively complicated lubrication system in addition motor, particularly cylinder block have comparatively complicated oil line pipe, and make processed complex, cost improves.
For above problem, the same claimant of the utility model patent application discloses one in the patent application document of 201320302656.X to have good lubrication effect, structure is simple, low cost, and motor can be made under handstand or heeling condition can to keep the lubrication system of the four stroke engine of normal lubricating function.But the 3rd oil transportation channel in this lubrication system too stretches into distributor chamber, makes the lubricant oil in distributor chamber very easily enter cam chamber, to such an extent as to there is the larger shortcoming of lubricating oil consumption in actual applications, is therefore necessary to improve this shortcoming.
Model utility content
The purpose of this utility model is that, for above-mentioned defect of the prior art, provide a kind of lubrication system of four stroke engine of improvement, it can reduce the consumption of lubricant oil.
For realizing above-mentioned model utility object, the utility model have employed following technological scheme:
A lubrication system for four stroke engine, described four stroke engine comprises:
Food tray, for storing lubricant oil;
Crankshaft room;
Cam chamber;
Rocker arm chamber; And
Distributor chamber, it is connected with fuel tank, for gas mixture is separated into mist of oil and fluid oil, and for distributing the oil mass entering fuel tank and cam chamber;
Described lubrication system comprises: food tray is communicated with by oil supply gallery with crankcase, and in oil supply gallery, arrange the first one-way valve; Crankcase is communicated with by the first oil transportation channel with distributor chamber, and arranges the second one-way valve in the first oil transportation channel; Cam chamber is communicated with by the second oil transportation channel with rocker arm chamber; And rocker arm chamber is communicated with by least one drainback passage with crankcase, and the 3rd one-way valve is set in drainback passage;
Described distributor chamber comprises oil outlet, and this oil outlet is arranged on the end face of distributor chamber, and lubricant oil is entered in cam chamber by this oil outlet.
In addition, the utility model also provides following attached technological scheme:
The lubrication system of four stroke engine also comprises the 3rd oil transportation channel be arranged between described distributor chamber and cam chamber, and the 3rd oil transportation channel comprises oil inlet hole, and this oil inlet hole is the oil outlet of distributor chamber.
Described distributor chamber also comprises spill port, and this spill port is arranged on the bottom of distributor chamber, and lubricant oil is entered in food tray by this spill port.
The quantity of at least one drainback passage described is two, and arranges the 3rd one-way valve in each drainback passage and make lubricant oil can only flow back to crankshaft room from rocker arm chamber.
Described four stroke engine also comprises cylinder and cylinder block, and described oil supply gallery is spliced to form by cylinder and cylinder block at least partly.
Described four stroke engine also comprises air filter, and rocker arm chamber is communicated with by vent passage with air filter.
Compared to prior art, advantage of the present utility model is: the lubrication system disclosing a kind of follow-on four stroke engine, the distributor chamber of this four stroke engine comprises oil outlet, and this oil outlet is arranged on the end face of distributor chamber, and lubricant oil is entered in cam chamber by this oil outlet.Therefore relative to prior art, the difficulty that lubricant oil enters cam chamber from distributor chamber increases, thus can reduce the consumption of lubricant oil.
Accompanying drawing explanation
Fig. 1 is the sectional view of the four stroke engine corresponding to the utility model preferred embodiment.
Fig. 2 is the sectional view of E-E line in Fig. 1.
Fig. 3 is the worm's eye view of the cylinder block corresponding to the utility model preferred embodiment.
Fig. 4 is the sectional view of the cylinder block corresponding to the utility model preferred embodiment.
Fig. 5 is the partial perspective view of the cylinder block corresponding to the utility model preferred embodiment.
Fig. 6 is the distributor chamber bottom stereogram corresponding to the utility model preferred embodiment.
Fig. 7 is the schematic diagram of the lubrication system corresponding to the utility model preferred embodiment.
Embodiment
Below in conjunction with preferred embodiment and accompanying drawing thereof, technical solutions of the utility model are further non-limitingly described in detail.
Shown in Fig. 1 to Fig. 7 is the relevant view of four stroke engine, this four stroke engine is vertically place, it comprises crankshaft room 1, fuel tank 2, cam chamber 3, rocker arm chamber 4, distributor chamber 5, air filter 6, piston 7, cylinder (not shown), cylinder block 9 and bent axle 10, the application number provided due to above-mentioned each parts and background technique is that the patent document of 201320302656.X is roughly similar, therefore omit it at this to describe in detail, only explanation is explained in detail to its innovation.
Lubrication system (non-label) is also provided with between above-mentioned each parts, this lubrication system clean machine oil that continuously quantity is enough, temperature is suitable when engine operation is transported to the friction surface of whole driving component, and oil film is formed between friction surface, realize liquid friction, thus reduce surface friction drag, reduce power consumpiton, alleviate component wear, to reach the object improving engine operation reliability and durability.Above-mentioned lubrication system is roughly the same with above-mentioned referenced patent application, namely comprises: the one-way valve 212 being arranged on the oil supply gallery 21 between crankshaft room 1 and fuel tank 2 and being arranged in this oil supply gallery 21; Be arranged on the one-way leaf valve 151 between crankshaft room 1 and distributor chamber 5; Be arranged on the second oil transportation channel 34 between cam chamber 3 and rocker arm chamber 4; Be arranged on the 3rd oil transportation channel 53 between distributor chamber 5 and cam chamber 3; And at least one drainback passage 41 be arranged between rocker arm chamber 4 and crankshaft room 1 and the one-way valve 413 be arranged in this at least one drainback passage 41, preferably, the quantity of this drainback passage 41 is two and is roughly parallel to each other, equally, the quantity of one-way valve 413 is also two, and arranges respectively in these two drainback passages 41.
The cylinder block 9 of four stroke engine that what Fig. 3 to Fig. 6 was corresponding is, in the present embodiment, is provided with distributor chamber 5 in the bottom of this cylinder block 9, this distributor chamber 5 is independently chambers, and be positioned at the top of fuel tank 2, certainly, distributor chamber 5 also can be arranged on other positions of motor.Distributor chamber 5 comprises end face 50, wall 51 and bottom 52, and end face 50 is a part for cylinder block 9, and wall 51 extends to form downwards bottom cylinder block 9, and bottom 52 is fixedly mounted on bottom distributor chamber 5, and concrete Placement is that screw connects.The end face 50 of distributor chamber 5 arranges an oil outlet 500, and the shape of this oil outlet 500 is roughly rounded; The bottom 52 of distributor chamber 5 arranges a spill port 520, and the shape of this spill port 520 is roughly circle; The pore size of oil outlet 500 and spill port 520 can suitably change, and is according to being assigned to cam chamber 3 and being assigned to the oil mass ratio of fuel tank 2 and changing, thus adapts to the demand of different model motor.
With further reference to Fig. 7, distributor chamber 5 and cam chamber 3 are interconnected by the 3rd oil transportation channel 53,3rd oil transportation channel 53 comprises oil inlet hole 510, this oil inlet hole 510 is the oil outlet 500 of distributor chamber 5, it does not extend in the chamber of distributor chamber 5, and the pore size of oil inlet hole 510 changes along with the change of oil outlet 500 pore size simultaneously.
Because the position of distributor chamber 5 has changeability, so distributor chamber 5 can be designed to mutually closely fit, or one-body molded with cam chamber 3, in this case, do not need between distributor chamber 5 and cam chamber 3 to arrange oil transportation channel.Corresponding to the situation that above-mentioned distributor chamber 5 fits tightly mutually with cam chamber 3, only need the position of the corresponding oil outlet 500 in the bottom of cam chamber 3 to arrange a through hole (not shown), lubricant oil can enter in cam chamber 3 from oil outlet 500; And corresponding to above-mentioned integrated situation, lubricant oil can enter cam chamber 3 by the oil outlet 500 of above-mentioned distributor chamber 5.
The roughly workflow of lubrication system is: utilize the pressure change in the crankshaft room 1 that produces because of the to-and-fro motion of piston 7, when piston 7 from lower dead centre upwards dead-centre motion time produce negative pressure, lubricant oil is sucked in crankshaft room 1 each component lubricated in crankshaft room 1 under being arranged on the effect of oil supply gallery 21 negative pressure in crankshaft room 1 between crankshaft room 1 and fuel tank 2 on the one hand, the lubricant oil that two way to cycle oil 41 mutually walked abreast be arranged on the other hand between crankshaft room 1 and rocker arm chamber 4 will lubricate each component in rocker arm chamber 4 sucks crankshaft room 1, and in above-mentioned two way to cycle oil 41, be provided with one-way valve 413 make lubricant oil can only flow to crankshaft room 1 from rocker arm chamber 4.The malleation produced when piston 7 dead-centre motion downward from upper dead center, by the first oil transportation channel 15 be arranged between crankshaft room 1 and distributor chamber 5, the mist of oil produced in crankshaft room 1 is imported distributor chamber 5, the most of lubricant oil entering distributor chamber 5 is back to fuel tank 2 by the spill port 520 be arranged between distributor chamber 5 and fuel tank 2, another part mist of oil simultaneously entering distributor chamber 5 enters in the 3rd oil transportation channel 53 by the oil outlet 500 being arranged on distributor chamber 5 top, and thread a pipe 53 importing cam chambers 3 in order to lubricate cam structure by the 3rd oil transportation, mist of oil after lubrication cam structure flows into rocker arm chamber 4 by the 3rd oil transportation path 34 be arranged on bottom cam chamber 3 top and rocker arm chamber 4 and continues each component in lubrication rocker arm chamber 4.Be provided with the vent passage 46 communicated with air filter 6 in the central position of rocker arm chamber 4, the gas leakage of blowing produced in lubrication oil circulation is drained into air filter 6 by this vent passage 46, and this is blown gas leakage and enters firing chamber (not shown) burning by this air filter 6.
In sum, the inside of distributor chamber is stretched into compared to the oil inlet hole of the 3rd oil transportation channel in prior art, the utility model is by setting out oilhole 500 at the end face 50 of distributor chamber 5, it is the oil inlet hole 510 of the 3rd oil transportation channel 53, the difficulty that lubricant oil enters cam chamber 3 can be increased like this, thus reduce the consumption of lubricant oil, through experimental verification, when the pore diameter size of oil outlet 500 and spill port 520 is in above-mentioned scope, the lubricant oil entering cam chamber 3 from oil outlet 500 meets the lubrication needs of cam chamber 3 and rocker arm chamber 4 just, thus the waste of lubricant oil can not be caused.
It is to be noted; above-mentioned preferred embodiment is only and technical conceive of the present utility model and feature is described; its object is to person skilled in the art can be understood content of the present utility model and implement according to this, protection domain of the present utility model can not be limited with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (6)
1. a lubrication system for four stroke engine, described four stroke engine comprises:
Food tray, for storing lubricant oil;
Crankshaft room;
Cam chamber;
Rocker arm chamber; And
Distributor chamber, it is connected with fuel tank, for gas mixture is separated into mist of oil and fluid oil, and for distributing the oil mass entering fuel tank and cam chamber;
Described lubrication system comprises: food tray is communicated with by oil supply gallery with crankcase, and in oil supply gallery, arrange the first one-way valve; Crankcase is communicated with by the first oil transportation channel with distributor chamber, and arranges the second one-way valve in the first oil transportation channel; Cam chamber is communicated with by the second oil transportation channel with rocker arm chamber; And rocker arm chamber is communicated with by least one drainback passage with crankcase, and the 3rd one-way valve is set in drainback passage;
It is characterized in that: described distributor chamber comprises oil outlet, this oil outlet is arranged on the end face of distributor chamber, and lubricant oil is entered in cam chamber by this oil outlet.
2. the lubrication system of four stroke engine according to claim 1, it is characterized in that it also comprises the 3rd oil transportation channel be arranged between described distributor chamber and cam chamber, the 3rd oil transportation channel comprises oil inlet hole, and this oil inlet hole is the oil outlet of distributor chamber.
3. the lubrication system of four stroke engine according to claim 1, is characterized in that: described distributor chamber also comprises spill port, and this spill port is arranged on the bottom of distributor chamber, and lubricant oil is entered in food tray by this spill port.
4. the lubrication system of four stroke engine according to claim 1, is characterized in that: the quantity of at least one drainback passage described is two, and arranges the 3rd one-way valve in each drainback passage.
5. the lubrication system of four stroke engine according to claim 1, is characterized in that: described four stroke engine also comprises cylinder and cylinder block, and described oil supply gallery is spliced to form by cylinder and cylinder block at least partly.
6. the lubrication system of four stroke engine according to claim 1, is characterized in that: described four stroke engine also comprises air filter, and rocker arm chamber is communicated with by vent passage with air filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420645063.8U CN204163797U (en) | 2014-10-31 | 2014-10-31 | The lubrication system of four stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420645063.8U CN204163797U (en) | 2014-10-31 | 2014-10-31 | The lubrication system of four stroke engine |
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| Publication Number | Publication Date |
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| CN204163797U true CN204163797U (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420645063.8U Active CN204163797U (en) | 2014-10-31 | 2014-10-31 | The lubrication system of four stroke engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295339A (en) * | 2014-10-31 | 2015-01-21 | 苏州科瓴精密机械科技有限公司 | Lubricating system of four-stroke engine |
| 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 |
-
2014
- 2014-10-31 CN CN201420645063.8U patent/CN204163797U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295339A (en) * | 2014-10-31 | 2015-01-21 | 苏州科瓴精密机械科技有限公司 | Lubricating system of four-stroke engine |
| WO2016066143A1 (en) * | 2014-10-31 | 2016-05-06 | 苏州科瓴精密机械科技有限公司 | Lubrication system of four-stroke engine |
| 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 |
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