CN1077213C - Lubricating structure for front engine - Google Patents

Abstract

The invention provides a lubricating structure for an engine of a motorcycle. As understood from a comparison example (a), oil is fed into a lubricating structure part 171 through an oil through-hole 172 so as to filled therein. On the contrary, in an embodiment (b), oil fed into the lubricating structure part 171 through the oil through-hole 172, can be discharged through an oil relief groove 178, so that the oil is not collected by a large quantity in the lubricating structure part 171. Thus, in an engine even having such a structure that the axis of a cylinder is substantially horizontal so that oil is likely to be collected in the lubricating structure part, the oil can be effectively discharged through the oil relief groove 178, thereby it is possible smoothly operate a valve mechanism.

Description

The lubricating structure of front engine

The present invention relates to the lubricating structure of front engine, particularly relate to the lubricating structure of the motor of the hybrid type motor bike that is fit to possess motor and motor.

Now, though be that the vehicle of power source is a main flow with the petrol engine,,, be that the electric vehicle of power source necessitates with the motor for fear of toxic emission.Because reasons such as the car body weight of electric vehicle increase, operating range is short, the demand that possesses the hybrid vehicle of petrol engine and motor simultaneously also increases.

For example, the patent gazette spy opens the invention that flat 8-175477 number " motor of motor bike etc. and the power switching device of motor " just relates to the hybrid type motor bike.

The motor 10 of above-mentioned patent gazette is simple air cooling 2 cycle engines.

But, on motor bike,, preferably carry 4 cycle engines, but the whole height of 4 cycle engines compares with 2 cycle engines and wants high if consider combustion efficiency and discharging, under the situation of considering centre of gravityization, Boring mill is turned forward.

Figure 16 is the schematic representation of wanting portion of expression existing piston mechanism.Its structure is to allow the relief opening 202 of valve guide bushing 203 facing to cylinder head 201, in this valve guide bushing 203, insert the bar 205 of valve 204 slidably, front end at bar 205 is installed seat ring 206, by being connected, an end of valve spring 207 and this seat ring 206 give the potential energy of valve 204 with closing direction, utilize cam 208 valve 204 to be released along opening direction, utilize valve spring 207 to allow valve return along closing direction by the cup cover 209 of valve tappet.

The 211st, oil hole is supplied with mist of oil by this oil hole 211 in engine lubrication structure portion 212, in order to lubricate cup cover 209 and the valve spring 207 that comes and goes in engine lubrication structure portion 212.

And, if improve combustion efficiency, just must do one's utmost to reduce the friction impedance, for this reason, valve cage is preferably dry, and soon valve cage is made the seal space that does not enter lubricant oil, so that there is not the friction impedance of lubricant oil on the valve train driving mechanism.

If allow Boring mill lean forward, the angle of the valve that is in downside is tilted with respect to the horizontal axis below.Like this, having on the motor of valve tappet, may make lubricant oil be difficult to flow out from above-mentioned oil hole 211, lubricant oil is detained in engine lubrication structure portion 212, is difficult to inject new lubricant oil, influences air door operation etc.

Valve cage is being made in the engine construction of the seal space that does not enter lubricant oil, also produced the lubricant oil offer cylinder head and be difficult to return problem in the food tray.

Therefore, purpose of the present invention just provides the engine lubrication structure that is applicable to centre of gravity hybrid type power unit.

For achieving the above object, the 1st invention provides a kind of lubricating structure of motor, this motor is to utilize camshaft to drive the valve of motor by valve tappet, and allow cylinder axis lean forward, make engine valve shaft angle degree to be loaded in obliquely on the car body, on cylinder cap, have the engine lubrication portion of accommodating valve tappet to the horizontal axis below; It is characterized in that: on the lower wall of above-mentioned engine lubrication portion, be provided with oily discharge channel.

If air valve shaft tilts with respect to horizontal axis below, be easy to be stranded in structure in the engine lubrication portion though become oil.But can seek the centre of gravityization of hybrid type power unit, can oil be emitted effectively by oily discharge channel simultaneously.

For achieving the above object, the 2nd invention provides a kind of lubricating structure of motor, this motor is equipped in the valve train driving mechanism on cylinder cap, the valve cage of taking in the valve train driving mechanism is installed in the sidepiece of cylinder, and valve cage is the seal space of isolating with oil, cylinder axis roughly is level, has the oil that the oil in the valve cage is turned back to food tray and emit path on cylinder head and cylinder block; It is characterized in that: make oil emit path and keep constant slope to extend from the valve cage bottom downwards, on cylinder block and cylinder head, be provided with air flue simultaneously from food tray to valve cage top.

Emit path by the oil of bottom oil is released to the food tray from valve cage, the air flue by top provides air to valve cage from food tray, therefore can successfully carry out emitting of oil.

Fig. 1 relates to the side view of motor bike of the present invention.Fig. 2 is the side sectional view of power unit of the present invention.Fig. 3 is the section plan of power unit of the present invention.Fig. 4 is the pie graph of the circular cone type stepless speed variator of the present invention action diagram of holding concurrently.Fig. 5 is the pie graph and the action diagram of circular cone type stepless speed changer.Fig. 6 relates to the explanatory drawing of engine lubrication system of the present invention.Fig. 7 relates to the explanatory drawing of speed changer lubrication system of the present invention.Fig. 8 is that expression relates to front view camshaft drive, the power unit as the valve train driving mechanism of the present invention.Fig. 9 relates to the allocation plan of AI Reed Valve of the present invention and water pump.The hold concurrently installation diagram of shared belt pulley of the sectional view that Figure 10 relates to water pump of the present invention.Figure 11 is the 11-11 sectional view of Fig. 9.Figure 12 be valve mechanism related to the present invention want portion's schematic representation.Figure 13 is the enlarged view that Figure 12 wants portion.Figure 14 is the view (removing tappet mechanism) of arrow 14 directions of Figure 12.Figure 15 relates to the action diagram of engine lubrication structure of the present invention portion.Figure 16 is that the existing valve mechanism of expression is wanted the schematic representation of portion.

Followingly embodiments of the invention are described with reference to accompanying drawing.Drawing all points to by symbol in addition.

Fig. 1 is the side view of motor bike related to the present invention.

The structure of motor bike is: dispose the box main frame 2 that is also used as storage battery folding and unfolding case in the bottom of central authorities.Stretch out the front arm 4 that is reverse U shape by preceding pivot 3 from the forward lower part of this main frame 2, on this front arm 4, front-wheel 5 is installed free to rotately, on the other hand, extend obliquely upward from the front upper of above-mentioned main frame 2 and to lift one's head pipe stanchion 7, fixing head pipe 8 at the front end of this pipe stanchion 7, on this pipe 8, handle bracket 9 can be installed rotationally, in the lower end of this handle bracket 9 pitman arm 11 is installed, the front end (lower end) of this pitman arm 11 is attached on the steering knuckle arm 12 that is installed on front-wheel 5, top, back at main frame 2 can joltily be installed with power unit 15 by the back pivot 13 as axis of rocking, trailing wheel 16 is installed on this power unit 15, on drawing, the former configuration posterior bumper 17 of trailing wheel 16, the back side of trailing wheel 16 has disposed air-strainer 18, outlet pipe 19, baffler 21, jet pipe 22, vehicle body are from front to back by front mudguard 25, front truck cover 26, front hand grip cover 27, middle car cover 28, back car cover 29, rear mudguard 31 surrounds.

In addition, the 30th, bar axle, the 32nd, preceding brake puck, the 33rd, brake calipers, the 34th, resin spring, the 35th, front shock absorber, the 36th, pin baffle plate, the 37th, driver pedal, the 38th, side support, the 39th, master bracket.On drawing top, the 41st, loudspeaker, the 42nd, front car light, the 43rd, handle, the 44th, handle, the 45th, air-guiding aisle, the 46th, radiator, the 47th, fan, the 48th, seat, the 49th, safety helmet case, the 51st, safety helmet, the 52nd, taillight, the 55th, power unit case.

Above-mentioned power unit case 55 is by left and right sides crank box 55a, 55b, (the right crank box 55b at the back side does not illustrate in the drawings) and gearbox 55c and electric case 55d and deceleration cabinet 55e formation.

Fig. 2 is the side sectional view of power plant of the present invention.

Power unit 15 (as following shown in Figure 8, has the four-circulation motor of the camshaft that has 2 suctions, exhaust on cylinder head.) be characterised in that, bottom in power unit case 55 configuration bent axle 56, with this bent axle 56 abreast at top configuration clutch shaft 57, keep straight on along vehicle body length direction (vehicle body fore-and-aft direction) configuration speed change arbor 58, motor reel 59, clutch shaft 57, speed change arbor 58 and motor reel 59 at an end of this clutch shaft 57 and to arrange.And all dispose at an upper portion thereof abreast with bent axle 56.

Because clutch shaft 57, speed change arbor 58 and motor reel 59 are arranged along the craspedodrome of vehicle body fore-and-aft direction, just become single direction so act on the direction of the power of power unit case 55, thereby the design of power unit case 55 are just become easy.Specifically, can strengthen rigidity in the direction of power effect, and reduce rigidity in the direction that does not stress, as a whole, only because of active force by simplification, just can alleviate power unit case 55 and can make the compactness of power unit case 55.

In addition, among the figure, the 75th, plane table thermoconductivity meter, the 76th, potentiometer is used to detect the corner of speed Control motor 95 described later.The 121st, the camshaft actuated belt pulley, the 78th, the water pump that is driven by belt pulley 121, the 79th, belt housing, the 103a below the figure central authorities is an oil pump case.

First order driving wheel 61, first order follower 62, centrifugal clutch 67, speed changer 70, motor reel 59 (motor 80 when motor 80 quickens as motor) are " power-transmission systems of motor ", when motor 80 during as motor running motor reel 59 be " power-transmission system of motor ".

The details of each machine relevant with clutch shaft 57, transmission shaft 58 and motor reel 59 describes in other figure.

Fig. 3 is the section plan of power unit of the present invention.In this figure, describe the transmission situation of machine and driving force in detail.

First order driving wheel 61 with bent axle 56, drive the first order follower 62 that is installed on the clutch shaft free to rotately, with this first order follower 62, be independent of clutch shaft 57 ground driving starter and use the clutch Outside 64 of single direction clutch (overrunning clutch) 63 and the clutch inside 68 of centrifugal clutch 67, make for this reason and can connect first order follower 62 by cylindrical member 66, starter motor is used the clutch Outside 64 of single direction clutch and the clutch inside 68 of centrifugal clutch 67, just drive centrifugal clutch outside 69 when above and rotate when centrifugal clutch inside 68 reaches the revolution of defined, thereby clutch shaft 57 begins to rotate.

In addition, above-mentioned first order driving wheel 61 has side folder gear (せ ら ギ ャ) 61a and spring 61b, to prevent to impact sound.

Speed changer 70 is cone type stepless variable speed units, acts in detail among the other figure to illustrate.It comes transferring power with the order of transmission shaft 58 → interior disk 71 → cone 72 → outer cup cover 73, transmits its rotation by overrunning clutch 83 to motor reel 59.

Motor 80 is hollow motors, and permanent magnetic swage rotor 81 is installed on motor reel 59, and stator coil 82 is installed on electric case 55d.

Thereby, when centrifugal clutch 67 is in jointing state, just according to the sequence delivery driving force of clutch shaft 57, transmission shaft 58, speed changer 70, motor reel 59, come drive axle 90 by multi-plate torque limiter 84 and reduction gears mechanism 85 (reducing gear of forming by small gear 86 → gearwheel 87 → small gear 88 → gearwheel 89).

Multi-plate torque limiter 84 is that (disk 84b is installed on the inner 84a of limiter by the inner 84a of the limiter that rotates with motor reel, disk 84b, 84c, disk 84c is installed on the outside 84d of following limiter), the outside 84d of limiter and spring 84e constitute, small gear 86 fuses with limiter outside 84d.

Power just transmits according to the order of the inner 84a of limiter → outside 84d → small gear 86 of disk 84b → disk 84c → limiter.If surpass the excessive torque effect of prescribed torque, just between disk 84b and 84c, produce slide, to protect machine, the moment of torsion of regulation can utilize spring 84e to adjust.

In addition, the effect of flying wheel is being brought into play in the outside 64 of the single direction clutch that starter is used, be provided with the equilibrium block 91 that is used to obtain engine balance,, constitute the single direction clutch 63 of the rotation of transmitting starter by combined with single direction clutch inner 65 with starter.

There is not the starter of expression to rotate starter follower 93 among the figure by utilizing, can rotate centrifugal clutch inside 68 with single direction clutch inner 65 and starter with single direction clutch Outside 64 by starter, make motor begin to rotate, if starter becomes at a high speed with single direction clutch Outside 64, just the starter with low speed side is separated with single direction clutch inside 65.

Among the figure, at the other end (front end) of bent axle 56, have the camshaft actuated belt pulley 121 that is used for drive cam shaft etc., by these belt pulley 121 drive belts 122, belt pulley 121 and belt 122 will be described in detail in the back.

Fig. 4 and Fig. 5 are the pie graph of the cone type stepless variable speed unit of the present invention action diagrams of holding concurrently.

In Fig. 4, the distance (radius of gyration) from the center of circular cone fulcrum 74 to interior disk 71 is decided to be R1, the distance (radius of gyration) from the center of circular cone fulcrum 74 to outer cup cover 73 is decided to be R2, makes R1＞R2.

Because rotate major diameter (R1) position of cone with interior disk 71, so cone 72 to slowly run, is then rotated outer cup cover 73 with minor diameter (R2) position of cone 72 again, cup cover 73 is also to slowly run beyond the institute.

In addition, from outer cup cover 73 transmission of power, be that the rotation of cup cover 73 outside becomes than carrying out under the fast situation of motor reel 59 by overrunning clutch 83 to motor reel 59.

70a is the cam ball that is accompanied by rotation cup cover 73 outside the pushing of a figure left side, according to this pushing effect, produces contact pressure between cup cover 73 and the cone 72 outside.

70b, 70c, 70d are the oil seal circles, utilize the oil seal circle, form the seal space that is detained transmission oil in the inside of speed changer 70, with the oil of left clutch box 55b one side of oil seal circle 70d blocking figure.Thereby, do not worry that the machine oil in the clutch mixes with the speed changer oil phase.

In Fig. 5, the center of cone fulcrum 74 is R3 to the distance (radius of gyration) of interior disk 71, and the center of cone fulcrum 74 is R4 to the distance (radius of gyration) of outer cup cover 73, makes R3＜R4.

Disk 71 rotates minor diameter (R3) position of cone in utilizing, thereby cone 72 then utilize major diameter (R4) position of cone 72 to rotate outer cup cover 73 again, thereby outer cup cover 73 is also with high speed rotating with high speed rotating.

Like this according to the rotation of cone 72.Speed changer 70 just bringing into play deceleration, at the uniform velocity, the effect quickened.

Therefore, in Fig. 4, utilize speed Control motor 95, rotate control gear 97 by gear 96a, 96b, 96c.This control gear 97 has trapezoidal female thread portion 99 at the wheel hub position, this trapezoidal female thread portion screwed joint is on the trapezoidal outer screw section 98 that is fixed in case 55 1 sides, and the spiral motion control gear 97 that is accompanied by trapezoidal female thread portion 99 moves left to figure.Move left to figure with cone fulcrum 74 according to this mobile cone 72, become for example state of Fig. 5.

Here importantly, not that cup covers 73 1 sides outside, but be provided with trapezoidal yin, yang screw section 98,99 in interior disk one side.Cone 72 is covered 73 reaction quilt to scheming left side pushing because of outer cup.Its result, arrow masterpiece 1. is used on the control gear 97.The arrow 1. direction of indication is from the direction of low speed to high-speed mobile.Thereby, according to the structure of present embodiment, can utilize little moment of torsion, and can reduce the capacity of speed Control motor to high speed one side speed change.

Below lubrication system is described.

Fig. 6 is the explanatory drawing of engine lubrication system related to the present invention, and direction shown in the arrow is the flow process of lubricant oil.

In power engine assembly housing 55, be provided with bottom oil tank 101 in the bottom and be provided with top oil tank 102 on top, the 1st oil pump the 103, the 2nd oil pump 104 and the 3rd oil pump 105 in an end arranged coaxial of bent axle 56, at first utilize the 1st oil pump 103 to extract the oil of bottom oil tank 101 out and be fed to top oil tank 102 through the 2nd oil circuit 108 by filter 106 and the 1st oil circuit 107.

Then, the machine oil of top oil tank 102, flow to the 2nd oil pump 104 by the 3rd oil circuit 109, oil by 109 pressurizations of the 2nd oil pump is fed to the 4th oil circuit 111, filter the 112, the 5th oil circuit 113, main journal 56a, 56a, the 56b of connecting rod tip portion and other part of lubricated bent axle 56 (valve cage that does not particularly have expression among the figure) got back to bottom oil tank 101 then.112a is a filter hood.

Fig. 7 is the explanatory drawing of speed changer lubrication system related to the present invention.Utilize the 3rd oil pump 105 from the speed changer oil tank 115 of being located at power engine assembly housing 55 bottoms separately, extract transmission oils out, deliver to transmission shaft 58 by the 7th oil circuit 117 by the 6th oil circuit 116, by the oil circuit 118 in the transmission shaft 58 to speed changer 70 fuel feeding.Oil direction shown in arrow among the figure is returned speed changer oil tank 115, is extracted out by the 3rd oil pump 105 by filter 119.

Fig. 8 is the power unit front view that camshaft drive as the valve train driving mechanism related to the present invention is shown.

Figure the right at the cylinder block 129B that fuses with right crank shell 55b, left crank shell 55a is installed, configuration motor 80 on bent axle 56, the figure left side at cylinder block 129B, cylinder head 129H is installed, at the front end of extended outlet pipe 19 from this cylinder head 129H baffler 21 is installed, intake manifold 129M is connected on the cylinder head 129H through Carburetor 129C from the air filter 18 at the back side, figure upper left side, 129S is the mounting hole of starter motor.

So, in the drawings, by pulling down belt housing 79, just can see the camshaft drive 120 that constitutes by camshaft actuated belt pulley 121, belt 122, suction side camshaft pulley 123, exhaust side cams shaft pulley 124 and stretcher 125 from the front of power unit 15 as the valve train driving mechanism.

In addition, because also belt 122 can be made chain, belt pulley 121,123,124 is made sprocket wheel, so belt 122 is called synchronous belt, v belt, roller chain etc. " volume extension means ", camshaft actuated belt pulley 121 is called " the camshaft actuated rotor " that utilizes volume extension means to rotate, camshaft pulley 123,124 is called " the camshaft rotor " that utilizes volume extension means to rotate, and the selection of part is arbitrarily.

As shown in Figure 8 because with cylinder axis with approximate horizontal (for example with relative tilt angle, ground α=+ 10 °) lie down configuration along the overall width direction, so when realizing centre of gravityization, the length of cylinder body can be housed in the width of car, the degrees of freedom of design is just bigger.

Drawing is equivalent to see from front-wheel and it is characterized in that situation to trailing wheel, is at this moment disposing bent axle 56 and clutch shaft 57 from car body center 127 to the figure right side, from car body center 127 to the left side of figure configuration cylinder head 129H.At clutch shaft 57 drawing backs, " power-transmission system " that transmission shaft 58 and motor reel 59 etc. is constituted the axle as Fig. 2, connecting like that shown in 3.

Fig. 9 is the AI Reed Valve related to the present invention and the allocation plan of water pump.

The 150th, AI Reed Valve, AI are air.The omission of injecting; thereby it is to promote the check valve that is provided with in the system of waste-gas cleaning by be blown into an amount of air to relief opening; being configured among Figure 11 of this AI Reed Valve 150 describes; because AI Reed Valve 150 is arranged on the front of cylinder head 129H, thus the same with maintenance camshaft drive 120, as long as pull down belt housing; just can keep in repair at an easy rate; especially, by said apparatus, can utilize belt housing to protect AI Reed Valve 150 at ordinary times.

Above-mentioned common belt pulley 125 is also used as the tensioner of the tension force of adjusting pump belt pulley and belt 122, and it can be installed on the pump case 131 of water pump 78 rotationally, and details are narrated in the back.

Pump case 131 is not only accommodated pump rotor 132, also has 2 and adjusts slotted hole 133,134,135 ... (... represent several, below identical) be the Screw of package shell.

On the other hand, outstanding in parallel to each other two projecting strip part 128a, 128a on cylinder seat 129B are provided with guiding ditch 128b between them.

Figure 10 (a) and (b) are hold concurrently installations diagram of shared belt pulley of the sectional view of water pump related to the present invention.

In (a), water pump 78 is made of following member: pump rotor 132, be installed in the internal magnet 136 on this pump rotor 132, support the rotor fulcrum 137 of pump rotor 132 free to rotately, support the jacket 131a of an end of this rotor fulcrum 137, the outer shell base 131b of the other end of support rotor fulcrum 137, the axial region 131c that on this outer shell base 131b, forms, on this axial region 131c, be subjected to portion 138 by bearing, the 138 cup covers of installing 139, at the external magnet 141 of this glass cover 139 inner peripheral surfaces installation, and the shared belt pulley of on the outer circumferential face of cup cover 139, installing 125 or the like.Above-mentioned pump case 131 is made up of jacket 131a, outer shell base 131b, axial region 131c.

By the effect of belt 122, shared belt pulley 125, cup cover 139 and external magnet 141 1 rotate, and the magnetic line of force of this external magnet 141 just passes outer shell base 131b and arrives on the internal magnet 136, and gives internal magnet 136 with rotatory force.Thereby pump rotor 132 begins to rotate.

Thereby water pump 78 will pressurize by pump rotor 132 from the water that sucks path 142 suctions, supplies to water inlet 146 places of cylinder block again by drain passageway 143, eccentric pipe joint 145.Eccentric pipe joint 145 is the joint of a center deviation δ value of inlet and outlet shown in figure (b) in addition.

Therefore, by rotating 90 degree at the eccentric pipe joint 145 of figure on (a), just can be as scheming shown in (b), be that benchmark is with water pump 78 parallel mobile Δ values with the water inlet 146 of cylinder block.

Turn back to Fig. 9 again, loose bolts 147,147, by with above-mentioned eccentric pipe joint 145 along arrow 2. direction rotate, 3. shared belt pulley 125 is moved along arrow, to improve the tension force of belt 122, after the adjustment, tight a bolt 147,147.

Water pump 78 utilizes axial region 131c (with reference to Figure 10 (b)) chimeric among the guiding ditch 128b and two bolts 147,147 fixing, thereby can not move during except adjustment.

Figure 11 is the sectional view of the 11-11 of Fig. 9, and the air that AI Reed Valve 150 will be blown into from air inlet 151 is delivered to relief opening through the AI mouth 153 that Reed Valve 152 and cylinder head 129H open.If just close because the pressure of AI mouth 153 1 sides improves Reed Valve 152, do not flow backwards at air inlet 151 places so worry air or waste gas.

That Figure 12 represents is valve mechanism figure related to the present invention.Though intake valve with the exhaust valve shape, material is different but basic comprising is identical, so describe symbol is unitized.

Allow valve guide bushing 163,163 intakeport 161 or relief opening 162 places facing to cylinder head 129H, at valve guide bushing 163, insert valve 164 in 163 slidably, 164 bar 165,165, at bar 165,165 front end is equipped with seat ring 166,166, by with valve spring 167, an end of 167 is connected to seat ring 166, on 166, can be to valve 164,164 give the potential energy of closing direction, utilize the cam that does not have expression among the figure to pass through the cup cover 169 of valve tappet, 169 with valve 164,164 to opening the direction release, by valve spring 167,167 make valve 164,164 return along closing direction.The 171st, engine lubrication structure portion, the 172nd, oil hole.

In the motor of present embodiment, cylinder axis 126 is inclined upwardly with angle [alpha] (about 10 °) with respect to 175 of horizontal axis, and the bar axle 177 of following valve 164 tilts downwards with angle beta (about 7 °).

Figure 13 be Figure 12 want portion's enlarged view, it is characterized in that, on the underside wall of the engine lubrication structure portion 171 of the cup cover 169 of taking in valve tappet and valve spring 167 etc., be provided with oily discharge channel 178.

Figure 14 is the view (except the valve tappet) of arrow 14 directions of Figure 12, and in the drawings, above-mentioned oily discharge channel 178 is arranged at from the position of the position deviation of the end of the lubricating structure portion 171 of the motor of bottom.Because the oil of discharging on position, the end can touch on the figure on the unshowned cam, so that preferably can avoid disturbing and be alap position with cam.

Figure 15 (a) and (b) are action diagrams of the lubricating structure portion of motor related to the present invention.

(a) be comparative example, oil enters in the lubricating structure portion 171 of motor by oil hole 172, and oil has been full of the lubricating structure portion 171 of motor.

(b) be embodiment, if oil enters in the lubricating structure portion 171 of motor by oil hole 172, oil just can be discharged by oily discharge channel 178.So can in the lubricating structure portion 171 of motor, not be detained too much.

In addition, the lubricating structure portion of motor of the present invention is applicable to mini engine, but also can be used on medium-sized, the big-block engine.

The present invention can bring into play following effect according to above-mentioned formation.

According to the 1st invention, the Boring mill approximate horizontal, thus can seek the centre of gravityization of hybrid type power unit, simultaneously, when air valve shaft tilts with respect to the horizontal axis below, though become the structure that oil is detained easily in the lubricating structure portion of motor.And can oil be emitted by oily discharge channel.

Claims (2)

1. the lubricating structure of a front engine, this motor utilizes camshaft to drive engine valve by valve tappet, and its cylinder axis leans forward, the angle of engine air door-hinge is carried on car body obliquely to the horizontal axis below, has the engine lubrication structure portion (171) of accommodating valve tappet on cylinder head (129H); It is characterized in that, on the lower wall of above-mentioned engine lubrication structure portion (171), be provided with the oily discharge channel (178) of engine lubrication being constructed the oil importing cam side in the portion (171) by the tappet sidepiece.

2. the lubricating structure of a motor, this motor has the valve train driving mechanism on cylinder head, simultaneously, sidepiece at cylinder has the valve cage of accommodating the valve train driving mechanism, and valve cage is the seal space of isolating with engine oil, cylinder axis roughly is level, has the oil that the oil in the valve cage is released to food tray on cylinder head and the cylinder block and emits path; It is characterized in that: above-mentioned oil is emitted path when holding down constant slope ground from the bottom of valve cage and extend, and is provided with the air flue from food tray to piston chamber top on cylinder block and cylinder head.

Images