CN202900436U

CN202900436U - Engine

Info

Publication number: CN202900436U
Application number: CN 201220283785
Authority: CN
Inventors: 孔钊
Original assignee: Suzhou Cleva Precision Machinery and Technology Co Ltd
Current assignee: Suzhou Cleva Precision Machinery and Technology Co Ltd
Priority date: 2012-06-15
Filing date: 2012-06-15
Publication date: 2013-04-24
Anticipated expiration: 2022-06-15

Abstract

An engine comprises an air cylinder, a rocker arm chamber, an air filter, a crank case, an oil return passage, wherein a rocker arm chamber cover is arranged on the rookery arm chamber, a covering plate is arranged at the upper portion of the rocker arm chamber cover, a separation cavity is arranged between the rocker arm chamber cover and the covering plate, and an oil drainage passage is arranged in the separation cavity and at least comprises a part of the inner wall of the separation cavity. According to the engine, lubrication oil in the separation cavity can be drained out rapidly through the oil drainage passage, the lubrication oil in the separation cavity is prevented from being pressed into the air filter, so that the consumption of the lubrication oil when the engine works is effectively reduced, the discharging of pollutants is lowered.

Description

Motor

Technical field

The utility model relates to a kind of motor, relates more specifically to a kind of motor with oil-gas separation chamber.

Background technique

As the hand-held shears for lawns take vegetation as object (cut-off machine) and Backpack power machine, traditional two-stroke and four-stroke small-sized universal engine have been widely used as driving operating personnel oneself motor portable or that bearing the working machine that carries out operation.Because it is more and more stricter that the pollutant emission regulation becomes, so the demand that driving source is replaced by four stroke engine from two-stroke improves day by day, yet four stroke engine has more complicated lubrication system, this so that motor when moving with the angle of inclination, not too work.The lubricated main design problem that becomes each motor manufacturer only has Honda Company to be used for the four stroke engine that can work of batch production by the EP835987 patented technology now under various angles of inclination.This technology adopts Special oil tank around being installed in rotating blade on the bent axle producing mist of oil, but designed engines is wider in this way, and heavier, cost is higher.The US Patent No. 6213079 of FUJI ROBIN has disclosed a kind of lubrication system in addition, but this kind lubrication system is comparatively complicated, and comparatively complicated asphalt channel is particularly arranged on the cylinder block, makes processed complex, and cost improves.

Existing motor is provided with oil-gas separation chamber in rocker arm chamber, with enter in the gas mixture of rocker arm chamber lubricating oil separation out, must discharge disengagement chamber but the lubricant oil of separating is how fast effective, the lubricant oil that prevents from accumulating in the disengagement chamber sprays into air filter, how to discharge when motor tilts or is inverted particularly that lubricant oil is a technical problem always in the disengagement chamber.

The model utility content

The utility model provides a kind of motor that makes tilting or be inverted the motor that can both fast the lubricant oil in the oil-gas separation chamber be discharged when using in order to address the above problem, and it is achieved through the following technical solutions:

A kind of motor, comprise cylinder, rocker arm chamber, air filter, crankcase, drainback passage, described rocker arm chamber top is provided with Rocker arm chamber cap; Rocker arm chamber cap top is provided with cover plate; be provided with disengagement chamber between described Rocker arm chamber cap and the cover plate, is provided with oil drain passage in the described disengagement chamber, and described oil drain passage comprises the inwall of part disengagement chamber at least.

Preferably, also be provided with stopper in the described disengagement chamber, described oil drain passage is made of inwall and stopper.

Preferably, described stopper can be individual components, also can be made of one with Rocker arm chamber cap or cover plate.

Preferably, described oil drain passage comprises oil drainage hole and path.

Preferably, described stopper has breach and plug groove, and described oil drainage hole is made of breach and inwall, and described path is made of plug groove and inwall.

Preferably, described stopper is made of plastics.

Preferably, described oil drain passage has many, is located at respectively on Rocker arm chamber cap and the cover plate, and motor is being tilted or during handstand work, has at least the oil drain passage can oil extraction.

Preferably, be provided with groove between described Rocker arm chamber cap outer wall and cover plate lower wall, described oil drain passage is communicated with drainback passage by groove.

Oil drain passage is set in the motor disengagement chamber lubricant oil in the disengagement chamber is discharged fast, the oil drain passage part is made of the disengagement chamber inwall simultaneously, takes full advantage of the space in the disengagement chamber, has simplified the structure of disengagement chamber.

Description of drawings

Fig. 1 is the utility model embodiment's sectional view.

Fig. 2 is the schematic representation of the utility model embodiment lubrication system.

Fig. 3 is the utility model embodiment's sectional view.

Fig. 4 is the utility model embodiment's sectional view.

Fig. 5 is the worm's eye view of the utility model embodiment cylinder.

Fig. 6 is the plan view of the utility model embodiment cylinder block.

Fig. 7 is the worm's eye view of the utility model embodiment cylinder block.

Fig. 8 is the utility model embodiment distributor chamber bottom schematic representation.

Fig. 9 is the utility model embodiment Rocker arm chamber cap worm's eye view.

Figure 10 is the utility model embodiment Rocker arm chamber cap plan view.

Figure 11 is the utility model embodiment cylinder top sectional view.

Figure 12 is the utility model second embodiment's Rocker arm chamber cap worm's eye view.

Figure 13 is the sectional view in the A-A cross section of Figure 12.

Figure 14 is the schematic representation of second embodiment's stopper.

Figure 15 is the schematic representation of second embodiment's cover plate.

Embodiment

Come the utility model is described further below in conjunction with specific embodiment.

As shown be the lubrication system that is used for motor of the utility model preferred implementation, comprise crankcase 1, food tray 2, cam chamber 3, rocker arm chamber 4 and air filter 6 such as Fig. 1-4 for the motor of vertically placing.Food tray 2 is used for storing lubricant oil, and food tray 2 tops are crankcase 1, and bent axle 10 is arranged in the crankcase 1 and engages with piston 7 in the cylinder 8, and the motion of piston 7 in cylinder 8 makes crankcase 1 interior generation pressure variation.Described food tray 2 is communicated with by oil supply gallery 21 with crankcase 1, oil supply gallery 21 1 ends are provided with oil suction section 215, when moderate lubrication oil was arranged in the food tray 2, oil suction section 215 can remain on below the lubricated pasta when motor tilts or stand upside down, and guarantees that it can oil suction from food tray 2.Oil supply gallery 21 the other end are jet 210, jet 210 is below the sidewall and piston 7 lower dead centres of cylinder 8, that is to say, moving up and down of piston 7 can't shelter from jet 210, jet 210 is in open state always, and the lubricant oil of drawing from food tray 2 sprays into crankcase 1 from jet 210.Described oil supply gallery 21 comprises annular pass 211, and shown in Fig. 1,5 and 6, annular pass 211 is spliced by the groove that is arranged on cylinder 8 and the cylinder block 9 respectively.The groove of the annular pass 211 on the cylinder 8 is provided with slotted eye 214, the groove of the annular pass 211 on the cylinder block 9 is provided with lower slotted eye 213, oil in the oil supply gallery 21 enters annular pass 211 by lower slotted eye 213, flow to upper slotted eye 214 around the annular pass, lubricant oil flows into camb cap passage 216 from upper slotted eye 214, described camb cap passage 216 is the part of oil supply gallery 21, and camb cap passage 216 is arranged on (as shown in Figure 3) on the cam chamber cap 31.Oil supply gallery 21 also is provided with the first one-way valve 212, the first one-way valves 212 and opens during for negative pressure in crankcase 1, close during for malleation in the crankcase 1, in the present embodiment one-way valve refer to can the control channel opening and closing control valve.Food tray 2 tops are provided with distributor chamber 5, and distributor chamber 5 is individual cavity, and in the present embodiment, distributor chamber 5 is arranged on cylinder block 9 bottoms, and certainly, distributor chamber 5 can be arranged on according to the variation of engine structure other positions of motor.Shown in Fig. 7 and 8, distributor chamber 5 comprises wall 51 and bottom 52, wall 51 extends to form downwards from cylinder block 9 bottoms, bottom 52 is fixed on distributor chamber 5 bottoms, bottom 52 is provided with spill port 520, and it is roughly circle, and present embodiment preferably arranges two spill ports 520, according to performance and the structural requirement of different motors, the quantity of spill port 520, size and shape can be made different variations.Oil gas enters behind the distributor chamber 5 and the parts in the distributor chamber 5 bump, for example with wall 51 and bottom 52 collisions, so that part oil gas liquefaction, lubricating oil enters food tray 2 by spill port 520, remaining oil gas enters the second oil transportation channel 53 by air outlet hole 531 and removes lubricated cam chamber 3, so distributor chamber 5 can effectively reduce the gas concentration that enters in the cam chamber 3.Crankcase 1 and distributor chamber 5 are communicated with by the first oil transportation channel 15, the first oil transportation channel 15 is provided with the second one-way valve 151, preferred the second one-way valve of present embodiment is the pornographic movie valve, but described leaf valve comprises the tinsel of a deformation, when being negative pressure in the crankcase, the second one-way valve 151 is closed, and when being malleation in the crankcase, the second one-way valve 151 is opened.Distributor chamber 5 and cam chamber 3 are communicated with by the second oil transportation channel 53.Cam chamber 3 is positioned at distributor chamber 5 tops, and cylinder 8 next doors are provided with cam mechanism in the cam chamber 3, the switching of control valve.Cylinder 8 tops are provided with rocker arm chamber 4, and cam chamber 3 and rocker arm chamber 4 are communicated with by the 3rd oil transportation channel 34.In the present embodiment, the 3rd oil transportation channel 34 is the passage (such as Fig. 1) around the tappet 35, and therefore two article of the 3rd oil transportation channel arranged.Rocker arm chamber 4 and crankcase 1 are communicated with (such as Fig. 4) by drainback passage 41, drainback passage 41 is provided with top-portion apertures 411 (such as Fig. 2) and base apertures 410, base apertures 410 is positioned at drainback passage 41 to rocker arm chamber 4 extension ends, when motor when using state; have grease accumulation in the rocker arm chamber 4; when motor when vertical direction uses; grease accumulation is in rocker arm chamber 4 bottoms; when the lubricant oil liquid level is higher than base apertures 410; lubricant oil siphons away by drainback passage 41 from base apertures 410, thereby can not make the lubricant oil in the rocker arm chamber 4 too much.Top-portion apertures 411 is positioned at rocker arm chamber 4 tops, and when motor used under handstand state, grease accumulation was at rocker arm chamber 4 tops, and when lubricated pasta was higher than top-portion apertures 411, this moment, lubricant oil was sucked away by drainback passage 41 from top-portion apertures 411.Drainback passage 41 is provided with return opening 412 at cylinder 8, and return opening 412 is positioned at piston lower dead centre below, and namely return opening 412 is in open state always, and return opening 412 can not passed through in the piston movement path.Drainback passage 41 also is provided with the 3rd one-way valve 413, and when being negative pressure in the crankcase 1, the 3rd one-way valve 413 is opened, and when being malleation in the crankcase 1, the 3rd one-way valve 413 is closed.Rocker arm chamber 4 and air filter 6 are communicated with by vent passage 46, and vent passage 46 opening ends 460 are at rocker arm chamber 4 middle parts, and the gas leakage of blowing that produces in the lubrication oil circulation is discharged to Carburetor entrance on the air filter 6 by opening end 460 through vent passage 46.

In the lubrication system of present embodiment the lubricating oil flow path as shown in Figure 2, moving up and down of piston 7 makes crankcase 1 internal pressure cyclically-varying, makes each position of motor produce pressure reduction, pressure reduction lubricant oil is along certain path flow.The pressure of crankcase 1 is that the pressure of P1, food tray 2 is that the pressure of P2, cam chamber 3 is that the pressure of P3, rocker arm chamber 4 is that the pressure of P4, distributor chamber 5 is that P5, barometric pressure are P0.When piston 7 moves from lower dead centre to upper dead center, crankcase 1 internal pressure reduces the generation negative pressure, this moment, each several part air pressure pass was P5＞P3＞P4＞P2＞P0＞P1, the first one-way valve 212, the 3rd one-way valve 413 and the 4th one-way valve 610 are opened, the second one-way valve 151 is closed simultaneously, lubricant oil enters crankcase 1 by oil supply gallery 21 in this moment food tray 2; lubricant oil in the rocker arm chamber 4 enter crankcase 1 by drainback passage 41; lubricant oil enters crankcase 1 by returning oily passage 61 in the air filter 6; lubricant oil that enters crankcase is broken into vaporific by crankshaft group, lubricated whole crankcase inner piece.When piston moves from upper dead center to lower dead centre, crankcase 1 internal pressure increases the generation malleation, this moment, the air pressure pass was P1＞P5＞P3＞P4＞P2＞P0, the first one-way valve 212, the 3rd one-way valve 413 and the 4th one-way valve 610 are closed, the second one-way valve 151 is opened, this moment, crankcase 1 interior mist of oil entered distributor chamber 5 by inlet hole 152 through the first oil transportation channel 15, pressure in the distributor chamber 5 increases, simultaneously mist of oil is distributor chamber 5 in and the wall 51 in the distributor chamber 5, bottom 52 parts such as grade collide and have the part mist of oil to become liquid oils, and liquid oils enters food tray by spill port 520; The residue mist of oil enters cam chamber 3 by air outlet hole 531 through the second oil transportation channel 53, the parts in the lubricated cam chamber 3; Mist of oil continues to enter rocker arm chamber 4 from cam chamber 3 by the 3rd oil transportation channel 34, the parts in the lubricated rocker arm chamber 4; Lubricant oil in the rocker arm chamber 4 enters drainback passage 41 by base apertures 411 or top-portion apertures 410, then gets back to crankcase 1; Rocker arm chamber 4 interior part mist of oils enter air filter 6 with blowing to leak gas through vent passage 46, and air filter 6 is separated lubricant oil by Oil-gas Separation with blowing to leak gas.Present embodiment utilizes the pressure variation in the crankcase 1 that each position generation pressure official post lubricant oil is flowed in certain lubrication channel motor, but the utility model is equally applicable to rely on the motor of oil pump feed.

Be depicted as present embodiment engine rocker chamber cap such as Fig. 9-11, Rocker arm chamber cap 400 is arranged on rocker arm chamber 4 tops, and Rocker arm chamber cap 400 is provided with oilhole, and oilhole is base apertures 410, top-portion apertures 411 and spill port 405 in the present embodiment.Drainback passage base apertures 410 is preferably two base apertures.Four edges of the upper wall 401 of Rocker arm chamber cap 400 are provided with four top-portion apertures 411, and motor is under inversion state, and no matter whichaway tilts, and can both guarantee to have at least a top-portion apertures 411 below lubricated pasta.Cylinder head 400 middle parts are provided with opening end 460, and the mist of oil in the rocker arm chamber leaves rocker arm chamber with the mixed gas that blows gas leakage formation by opening end 460.As shown in FIG. 10 and 11, be provided with disengagement chamber 408 and connecting passage 403 between the outer wall 402 of described Rocker arm chamber cap and the lower wall 501 of cover plate, disengagement chamber and connecting passage are spliced by Rocker arm chamber cap 400 and cover plate 500.Described connecting passage 403 comprises groove 406, and groove 406 is made of the depressed part on the lower wall 501 of the outer wall 402 of Rocker arm chamber cap and cover plate, certainly, only has Rocker arm chamber cap or cover plate depressed part to be arranged on one of them, also can form groove.Described connecting passage 403 is distributed on the plane vertical with piston.Described connecting passage 403 is communicated with base apertures 410, top-portion apertures 411, spill port 405 and disengagement chamber 408, base apertures 410 and top-portion apertures 411 are drawn onto lubricant oil outside the rocker arm chamber in rocker arm chamber 4, lubricant oil flows into spill port 405 along the groove 406 on the outer wall 402, flows into crankcase 1 again.Consist of connecting passage by Rocker arm chamber cap and cover plate and carry lubricant oil, simplified the oil channel structures on rocker arm chamber top, take full advantage of the space of Rocker arm chamber cap.Outer wall 402 middle parts are provided with disengagement chamber 408, and disengagement chamber 408 is made of the recess 404 on the outer wall 402 and cover plate 500, and it is squarely roughly.Be provided with the filtering material (not shown) in the disengagement chamber 408, wire netting for example, filtering material will become gas and fluid from the mixed gas separation that opening end 460 enters disengagement chamber 408, thereby reduce the concentration of mist of oil in the mixed gas, reduce the consumption of lubricant oil, and can reduce discharging.Gas after the separation leaves disengagement chamber 408 by lid hole 462 and flows to air filter 6.Also be provided with dividing plate 409 in the disengagement chamber 408, dividing plate is protruded by the disengagement chamber inwall and forms, and dividing plate 409 prolongs the flow path of mixed gas in disengagement chamber 408, has strengthened separating effect.

Such as Figure 12-the 15th, the mode of execution of the another kind of Rocker arm chamber cap of the utility model, in the present embodiment; Rocker arm chamber cap 400 ' is provided with two spill ports 405 '; spill port 405 ' is positioned at the relative both sides of Rocker arm chamber cap; each spill port 405 ' and a drainback passage 41 are connected, therefore, in the present embodiment; drainback passage 41 has two (not shown)s, these two drainback passages 41 are communicated with respectively rocker arm chamber and crankcase.Be provided with oil drain passage 420 ' in the disengagement chamber 408 ', described oil drain passage has many, can be distributed on Rocker arm chamber cap 400 ' or the cover plate 500 ', and the oil that accumulates in the disengagement chamber is discharged disengagement chamber.Described oil drain passage nestles up disengagement chamber inwall 419 ', is made of inwall 419 ' and stopper 415 ', and oil drain passage has utilized part inwall 419 ', has saved the space in the disengagement chamber.Stopper 415 ' can be parts independently, also can be to be made of one with Rocker arm chamber cap 400 ' or cover plate 500 '.Stopper 415 ' can be made by metal, plastics or other materials, and stopper 415 ' is made of plastics in the present embodiment, the convenient manufacturing.Described oil drain passage 420 ' comprises oil drainage hole 414 ' and path 418 ', and oil drainage hole 414 ' central axis and path 418 ' central axis are orthogonal.Described oil drainage hole 414 ' is communicated with spill port 405 ', and the oil of discharging from oil drainage hole 414 ' enters drainback passage 41 through spill port 405 ', and then gets back to the lubricated crankcase of participation in the crankcase.Preferably, oil drainage hole 414 ' is arranged near the square disengagement chamber 408 ' drift angle, and motor is worked under various attitudes, has below the lubricated pasta of at least one oil drainage hole in disengagement chamber, discharges the lubricant oil that gathers.Not breaking away under the utility model spirit, according to different engine structures, disengagement chamber also can have different shapes, makes motor have at least in working order an oil drainage hole to be immersed in the pasta below as long as the oil drainage hole in the disengagement chamber is arranged on.In the present embodiment, Rocker arm chamber cap 400 ' is provided with 4 oil drain passages 420 ', and cover plate 500 ' is provided with 3 oil drain passages 420 ', and the oil drain passage on the cover plate 500 ' makes motor when handstand state uses, and also can discharge smoothly the oil in the disengagement chamber.Described oil drainage hole 414 ' is communicated with spill port 405 ' by the groove 406 ' on the Rocker arm chamber cap outer wall.Described oil drainage hole 414 ' is to be made of the breach 417 ' on the stopper 415 ' and disengagement chamber inwall 419 '.Described stopper 415 ' is arranged in the disengagement chamber, and stopper 415 ' has plug groove 416 ', and itself and inwall 419 ' form path 418 '.Then lubricant oil in the disengagement chamber 408 ' flow in the groove 406 ' by oil drainage hole 414 ' inlet passage 418 ', enters in the drainback passage 41 by spill port 405 ' again.Similarly, when the motor handstand state, lubricant oil enters groove by the oil drainage hole 414 ' on the cover plate 500 ' (as shown in figure 15) and then enters drainback passage 41 by spill port 405 '.

The motor with disengagement chamber that the utility model provides is than the motor of prior art, oil drain passage can be discharged rapidly the lubricant oil in the disengagement chamber, prevent that the lubricant oil in the disengagement chamber is pressed into air filter, therefore the consumption of lubricant oil in the time of can effectively reducing engine operation reduces pollutant emission.In the situation of the oil circuit of simplifying lubrication system, can guarantee lubrication system in the different postures of using of motor simultaneously, for example motor stands upside down, when tilting to use good lubrication effect can both be arranged.

Claims

1. motor, comprise cylinder, rocker arm chamber, air filter, crankcase, drainback passage, it is characterized in that: described rocker arm chamber top is provided with Rocker arm chamber cap; Rocker arm chamber cap top is provided with cover plate; be provided with disengagement chamber between described Rocker arm chamber cap and the cover plate, is provided with oil drain passage in the described disengagement chamber, and described oil drain passage comprises the inwall of part disengagement chamber at least.

2. motor as claimed in claim 1, it is characterized in that: also be provided with stopper in the described disengagement chamber, described oil drain passage is made of inwall and stopper.

3. motor as claimed in claim 2, it is characterized in that: described stopper can be individual components, also can be made of one with Rocker arm chamber cap or cover plate.

4. motor as claimed in claim 2, it is characterized in that: described oil drain passage comprises oil drainage hole and path.

5. motor as claimed in claim 4, it is characterized in that: described oil drainage hole central axis and path central axis are orthogonal.

6. motor as claimed in claim 4 is characterized in that: described stopper has breach and plug groove, and described oil drainage hole is made of breach and inwall, and described path consists of by filling in groove and inwall.

7. motor as claimed in claim 2, it is characterized in that: described stopper is made of plastics.

8. such as the described motor of arbitrary claim in the claim 1 to 7, it is characterized in that: described oil drain passage has many, is located at respectively on Rocker arm chamber cap and the cover plate, and motor is being tilted or during handstand work, has at least the oil drain passage can oil extraction.

9. motor as claimed in claim 8, it is characterized in that: described Rocker arm chamber cap has outer wall, and described cover plate has lower wall, is provided with groove between described outer wall and lower wall, and described oil drain passage is communicated with drainback passage by groove.