CN1211672A - Valve spring seat structure for IC engine - Google Patents

Abstract

The invention provides a valve spring seat structure which is suitable for a motorcycle. A valve spring seat 172, having a substantially U-shaped section, is composed of a bottom surface 174 which is abutted against an axial positioning surface 173 formed on a cylinder head 129H, an outer rib 175 and an inner rib 176 bent from the bottom surface 174. The outer rib 175 has a diameter to the extent that it is abutted against a diametral positioning surface 177 formed on the cylinder head 129H. The inner rib 176 has a diameter larger than an outer diameter of a valve guide 163. As a result, a valve stem seal 171 can be arranged on an inner side of the inner rib 176. In addition, a stem 165 can be remarkably shortened compared to a conventional case.

Description

The valve spring seat structure for IC of internal-combustion engine

The present invention relates to the structure of the valve spring cup of internal-combustion engine (hereinafter referred to as " petrol engine " or only be called " motor "), particularly relate to the structure of the valve spring cup that is applicable to the hybrid type motor bike that has motor and motor simultaneously.

At present, be main flow with petrol engine as the vehicle of power source, still, and in the place that must avoid toxic emission, just need be with the electric vehicle of motor as power source.Because the car body weight of electric vehicle increases, reasons such as operating range weak point, the demand that possesses the hybrid vehicle of motor and motor simultaneously increases.

For example, the spy opens the invention that flat 8-174577 patent gazette " motor of motor bike etc. and the switchover apparatus of motor " just relates to the hybrid type motor bike.

The motor 10 of above-mentioned patent gazette is simple air-cooling type two stroke engine.

But, on motor bike, the situation of four stroke engine has appearred carrying because of all requirements.Four stroke engine is compared with two stroke engine, and the whole height of motor has increased, and aspect the lift-launch of the hybrid type power unit that is required compactness, has produced the problem that the power unit maximizes.

Figure 14 is the schematic representation of the major component of the existing movable valve of expression, its structure is to allow the relief opening 202 of valve guide bushing 203 facing to cylinder head 201, the axle 205 of valve 204 can be slidably inserted in this valve guide bushing 203, at the front end position of axle 205 fitting seat circle 206, this seat ring 206 of an end butt with valve spring 207, valve 204 is pushed away toward closing direction, the direction of utilizing cam 208 by the cup cover 209 of valve tappet valve 204 to be opened to valve is released, and utilizes valve spring 207 that valve 204 is returned toward the valve-closing direction.

The 211st, the sealing gasket of air valve shaft is the bubble-tight part between retainer shaft 205 and the valve guide bushing 203.

The 212nd, valve spring cup is the member that the location double as of an end (in the lower end of figure) of valve spring 207 supports.

Above-mentioned valve spring cup 212 is to stand to establish inward flange on the plectane of perforate, and this inward flange is engaged on the valve guide bushing 203, carries out the member of diametric location in view of the above.

As a ring that mixes with the miniaturization of motor, be the height that reduces axle 205, like this, sealing gasket 211 usefulness of air valve shaft will be set to the below in conjunction with ditch.Therefore, the diametric location of valve spring cup just becomes difficult.

Therefore, the object of the present invention is to provide the structure that is applicable to the valve spring cup that mixes the compactness of using motor.

In order to achieve the above object, the present invention program 1 valve spring cup is located between the end and cylinder head of the valve spring that the valve of internal-combustion engine is pushed away toward closing direction, it is characterized in that, this valve spring cup is by the bottom surface that is connected to the axial locating surface that forms on the cylinder head, roughly be the ring of font with the cross section that outward flange and inward flange constituted of turning up from this bottom surface, outward flange is got the diameter that abuts to the radial location face that forms on the cylinder head, and inward flange is got the diameter bigger than the external diameter of valve guide bushing.

Thereby, by the radial position of outward flange decision valve spring cup, support valve spring by inward flange, so can shorten the height of valve rod, shorten the height of valve, realize the compactness of valve mechanism, also can carry out the location of valve spring cup.

Fig. 1 is the side view of motor bike related to 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 structure of the cone-shaped stepless speed change machine of the present invention action diagram of holding concurrently.Fig. 5 is the structure of the cone-shaped stepless speed change machine of the present invention action diagram of holding concurrently.Fig. 6 is the explanatory drawing of engine lubrication system related to the present invention.Fig. 7 is the explanatory drawing of variable-speed motor lubrication system related to the present invention.Fig. 8 represents the camshaft drive as movable valve system driving mechanism related to the present invention, is the front view of power unit.Fig. 9 is the AI Reed Valve related to the present invention and the allocation plan of water pump.Figure 10 is the hold concurrently installation diagram of shared belt pulley of the sectional view of water pump related to the present invention.Figure 11 is the sectional view of the 11-11 of Fig. 9.Figure 12 is the major component schematic representation of expression movable valve mechanism related to the present invention.Figure 13 is the major component enlarged view of Figure 12.Figure 14 is the schematic representation of the existing movable valve mechanism major component of expression.

Embodiments of the invention below are described with reference to the accompanying drawings.In addition, drawing points to along symbol and sees.

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

Being constructed as follows of motor bike 1, box main frame 2 at the bottom of central authorities configuration double as storage battery folding and unfolding case, extend the front swing arm 4 that is inverted u-shaped by preceding pivot 3 from the front lower of this main frame 2, front-wheel 5 is installed on forward swing wall 4 freely to rotate, on the other hand, extend obliquely upward from the top of above-mentioned main frame 2 fronts and to lift one's head pipe stanchion 7, front end fixing head pipe 8 at this pipe stanchion 7, on this pipe 8, be rotatably mounted handle pillar 9, in the lower end of this handle pillar 9 steering arm 11 is installed, the front end (lower end) of this steering arm 11 is connected on the joint 12 that is installed on front-wheel 5, by the top, back that power unit 15 can swingingly be installed in main car frame 2 as the back pivot 13 of swing axis, trailing wheel 16 is installed on this power unit 15, on drawing, disposing posterior bumper 17 near the trailing wheel place, at trailing wheel 16 inboard configuration air filters 18, outlet pipe 19, baffler 21, jet pipe 22, surround car body, front mudguard 25 with following member from front to back, front truck cover 26, front hand grip cover 27, middle car cover 28, back car cover 29, rear mudguard 31.

In addition, the 30th, bar axle, the 32nd, preceding brake puck, the 33rd, slide calliper rule, the 34th, resin spring, the 35th, anterior bumper, the 36th, leg guard, the 37th, occupant's pedal, the 38th, side support, the 39th, master bracket.On drawing, 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.

This power unit case 55 is made up of left and right sides crank box 56a, 56b (inboard right crank box 55b is not shown), gearbox 55c, electric case 55d, deceleration cabinet 55e.

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

In the power unit 15 (as following 4 cycle engines that on cylinder head, have the camshaft of two suctions, exhaust shown in Figure 8), bottom in power unit case 55 is disposing crankshaft 56, above parallel, disposing clutch shaft 57 with this crankshaft 56, end at this clutch shaft 57 is disposing speed change arbor 58, motor reel 59 along the long direction (car body fore-and-aft direction) of car body, it is characterized in that, clutch shaft 57, speed change arbor 58 and motor reel 59 kept straight on arrange, and these are configured in the top parallel with crankshaft 56.

Because clutch shaft 57, speed change arbor 58 and motor reel 59 are being disposed along the car body fore-and-aft direction in upright arrangemently, just become simple so act on the direction of the power of power unit case 55.Thereby the design of power unit case 55 just becomes easy.Specifically can improve rigidity, not have the direction of effect to reduce rigidity, as a whole,, can alleviate the weight of power unit case 55, realize the compactness of power unit case 55 because active force is oversimplified along power along the direction of power effect.

In addition, among the figure, the 75th, planet-gear speed reducer, the 76th, potentiometer is the machine that detects the rotational angle of aftermentioned speed Control motor 95.The 121st, the camshaft actuated belt pulley, the 78th, the water pump that is driven by belt pulley 121, the 78th, belt housing, the 103a of figure central lower is an oil pump case.

Primary drive gear 61, elementary driven gear 62, centrifugal clutch 67, variable-speed motor 70, motor reel 59 (motor 80 is the motor 80 when quickening as motor) are " power-transmission systems that begins from motor ".The motor reel 59 of motor 80 during as motor running becomes " power-transmission system that begins from motor ".Relevant clutch shaft 57, the details of each machine of speed change arbor 58 and motor reel 59 describes in other figure.

Fig. 3 is the section plan of power unit of the present invention, the detailed construction of explanation machine and the transmission form of power in this figure.

Utilize the primary drive gear 61 of crankshaft 56, drive the elementary driven gear 62 that is installed in freely to rotate on the clutch shaft 57, utilize this driven gear 62 and clutch shaft 57 to drive starter independently and use the clutch Outside 64 of overrunning clutch 63 and the clutch inside 68 of centrifugal clutch 67, elementary driven gear 62 is employed the clutch Outside 64 of overrunning clutch and the clutch inside 68 of centrifugal clutch is connected by cylindrical member 66 with rising for this reason, if centrifugal clutch inner 68 surpasses the rotating speed of regulation, just drive centrifugal clutch outside 69 and rotate, clutch shaft 57 just begins to rotate.

In addition, above-mentioned primary drive gear 61 has adjusts pinion 61a and the spring 61b that phase difference is used, and has the structure that prevents to impact sound.

Variable-speed motor 70 is cone-shaped stepless speed change machines, detailed acting among the other figure illustrates, be according to the device of the sequence delivery power of speed change arbor 58 → interior disk 71 → cone 72 → outer cup cover 73, this rotation be delivered to motor reel 59 by overrunning clutch 83.

Motor 80 is no iron core motors, and mounting permanent magnet type rotor 81 on motor reel 59 is installed stator coil 82 on electric case 55d.

Thereby if centrifugal clutch 67 is in (ON) state, power just transmits according to the order of clutch shaft 57, speed change arbor 58, variable-speed motor 70, motor reel 59.By multi-plate torque limiter 84 and reduction gears mechanism 85 (reducing gear of being formed by small gear 86 → gearwheel 87 → small gear 88 → gearwheel 89) drive axle 90.

Multi-plate torque limiter 84 is that (disk 84b is installed on the inner 84a of limiter, and disk 84c is installed on the outside 84d of following limiter by the inner 84a of the limiter that rotates with motor reel 59, disk 84b, 84c.), limiter outside 84d, spring 84e form.Small gear 86 is an one with the outside 84d of limiter.

Power is done the time spent according to the sequence delivery of the inner 84a of limiter → outside 84d → small gear 86 of disk 84b → disk 84c → limiter if still surpass the excessive torque of setting moment of torsion, just skids between disk 84b and disk 84c, with the protection machine.Setting moment of torsion can utilize spring 84e to adjust.

In addition, starter is being brought into play the effect of flying wheel with overrunning clutch outside 64, have to obtaining the equilibrium block 91 of engine balance, by with the combination of starter with overrunning clutch inside 65, constitute the overrunning clutch 63 of the rotation of transmitting starter.

Utilize not shown starter, rotate starter driven gear 93, rotate centrifugal clutch inside 68 with overrunning clutch inner 65 and starter with overrunning clutch outside 64 by starter in view of the above, motor begins to rotate, if starter becomes at a high speed with overrunning clutch outside 64, just separate with overrunning clutch inside 65 with the low speed side starter.

In the drawings, have the camshaft actuated belt pulley 121 that is used for drive cam shaft etc. at the other end (front end) of crankshaft 56, utilize this belt pulley 121 drive belts 122, these belt pulleys 121 and belt 122 are described in detail in the back.

Fig. 4 and Fig. 5 are the structural drawing of the cone-shaped stepless speed change of the present invention mechanism action diagrams of holding concurrently.

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

Disk 71 rotates the long radius R1 part of cone in utilizing, so cone 72 to slowly run, utilizes minor radius (R2) part of cone 72 to rotate outer cup cover 73 then, cup cover 73 is to slowly run beyond the institute.

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

70a is the cam with the rotation followed effect of cup cover 73 outside a figure left side is released, and utilizes this release effect, adds contact pressure between cup cover 73 and the cone 72 outside.

70b, 70c, 70d are the oil seal pads, utilize oil seal pad 70b, 70c at the variable-speed motor 70 inner seal spacies of storing speed change machine oil that form, and utilize oil seal pad 70c to stop the machine oil of crank box 55b one side on a figure left side.Thereby, needn't worry that the machine oil in the crank box mixes with the variable-speed motor oil phase.

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

Disk 71 rotates minor radius (R3) part of cone in utilizing, so cone 72 with high speed rotating, utilizes long radius (R4) part of cone 72 to rotate outer cup cover 73 then, cup cover 73 is with high speed rotating beyond the institute.

Like this by the moving of cone 72, variable-speed motor 70 bringing into play deceleration, at the uniform velocity, the effect quickened.

For this reason, in Fig. 4, utilize speed Control motor 95, rotate control gear 97 by gear 96a, 96b, 96c, this control gear 97 has platform shape female thread 99 at lug boss, this shape female thread 99 is screwed with the platform shape external screw thread 98 that is fixed on case 55 1 sides, is accompanied by the spiral motion of platform shape female thread 99, and control gear 97 moves left to figure.Move by this, cone 72 moves left to figure with cone fulcrum 74, becomes the state as Fig. 5.

Here importantly, not that platform shape negative and positive screw thread 98,99 is located at outer cup cover 73 1 sides, and disk 71 1 sides in being provided in a side of.Cone 72 utilizes the reaction force quilt of outer cup cover 73 to the pushing of a figure left side.Its result, the arrow 1. masterpiece of direction is used on the control gear 97.Arrow direction 1. is with consistent to the direction of high-speed mobile from low speed.Thereby,, can also can reduce the capacity of speed Control motor 95 with little moment of torsion to changing at a high speed according to the structure of present embodiment.

Be lubricated the explanation of system below

Fig. 6 is the explanatory drawing of lubrication system related to the present invention, and the arrow indication is the flow direction of machine oil.

In power unit case 55, the bottom is provided with bottom oil tank 101, top is provided with top oil tank 102, end (right-hand member) at crankshaft 56 is disposing the 1st oil pump the 103, the 2nd oil pump 104 and the 3rd oil pump 105 coaxially, at first utilize oil pump 103 by filter 106 and the 1st oil circuit 107 with the machine oil sucking-off of bottom oil tank 101, supply to top oil tank 102 by the 2nd oil circuit 108.

Then, the machine oil of top oil tank 102 arrives the 2nd oil pump 104 by the 3rd oil circuit 109, main journal 56a, 56a, connecting rod tip position 56b and the other parts (particularly not shown movable valve cage) of having been lubricated crankshaft 56 by the 4th oil circuit 111, filter the 112, the 5th oil circuit 113 by the machine oil of the 2nd oil pump 104 pressurization are afterwards, turn back to bottom oil tank 101,112a is a filter hood.

Fig. 7 is the explanatory drawing of variable-speed motor lubrication system related to the present invention, utilize the 3rd oil pump 105 by the 6th oil circuit 116 with speed change machine oil from being located at another variable-speed motor oil tank 115 sucking-offs of power unit case 55, deliver to speed change arbor 58 by the 7th oil circuit 117, engine oil supplying is arrived variable-speed motor 70 by the oil circuit 118 in the speed change arbor 58.Machine oil turns back to variable-speed motor oil tank 115 according to arrow among the figure, by filter 119 by the 3rd oil pump sucking-off.

Fig. 8 represents the camshaft drive of conduct activity valve actuating mechanism related to the present invention, is the front view of power unit.

With the right side of the incorporate cylinder block 129B of right crank box 55b, left crank box 55a is installed, configuration motor 80 above crankshaft 56, left side at cylinder block 129B, cylinder head 129H is installed, at front end baffler 21 is installed, by Carburetor 129C intake manifold 129M is connected on the cylinder head 129H from the air filter 18 of scheming upper left inboard from the extended outlet pipe 19 of this cylinder head 129H.129S is the starter motor mounting hole.

In the drawings, by pulling down belt housing 79, front at power unit 15, can see the camshaft drive 120 as movable valve actuating mechanism, above-mentioned camshaft drive 120 is made of camshaft actuated belt pulley 121, belt 122, suction side camshaft pulley 123, exhaust side cams shaft pulley 124 and tensioner 125.

In addition, also can change belt 122 into chain, change belt pulley 121,123,124 into sprocket wheel, so, belt 122 is called " rolling mechanisms " such as synchronous belt, V belt, rolling chains, camshaft actuated belt pulley 121 is called " the camshaft actuated rotor " that is rotated by rolling mechanism, and camshaft pulley 123,124 is called " the camshaft rotor " that is rotated by rolling mechanism, and the selection of part is arbitrarily.

As indicated in Fig. 8, because cylinder axis 126 approximate horizontal ground (for example with respect to ground inclination angle α=+ 10 °) disposed along the overall width direction with lying down, thus can realize centre of gravityization, simultaneously, the length of cylinder is housed in the width of car, and the degrees of freedom of design is bigger.

The figure shows the state when front-wheel is seen trailing wheel, it is characterized in that, disposed crankshaft 56, clutch shaft 57 on the right side at car body center 127, disposed cylinder head 129H in the left side at car body center 127.In the inboard of clutch shaft 57, the connection of axle shown in Fig. 2,3 of " power-transmission system " that is constituted by speed change arbor 58 and motor reel 59 etc.

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

The 150th, AI leaf valve, AI are that air enters the abbreviation of (AirInjection), are to utilize to be blown into an amount of air to relief opening the check valve that is provided with in the system that promotes waste-gas cleaning.Being configured among Figure 11 of this AI leaf valve 150 describes, because AI leaf valve 150 is located at the front of cylinder head 129H, thus same when checking camshaft drive 120, as long as pull down belt housing, just can easily overhaul.Utilize above-mentioned device, can protect AI leaf valve 150 with belt housing at ordinary times.

Above-mentioned shared belt pulley 125 is also used as the tensioner of adjusting pump belt pulley and belt 122 tension force, is the device that can be installed in rotationally on the pump case 131 of water pump 78, and detailed structure is narrated in the back.

Pump case 131 is not only accommodated rotor 132, also has two and adjusts slotted hole 133,134.135 ... (... represent a plurality of, below identical) be pump case assembling Screw.

On the other hand, outstanding in parallel to each other 2 prominent bar 128a, 128a on cylinder block 129B are provided with guiding ditch 128b between these prominent bars.

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 be by pump rotor 132, be installed in internal magnet 136 on the pump rotor 132, freely to rotate support the shell pedestal 131b of the other end of the rotor fulcrum 137 of pump rotor 132, the clamshell 131a that supports an end of this rotor fulcrum 137, support rotor fulcrum 137, be installed in cup cover 139 on the above-mentioned axial region 131c at the axial region 131c that forms on this shell pedestal 131b, by bearing 138,138, be installed in external magnet 141 on cup cover 139 inner peripheral surfaces, the shared belt pulley 125 that is installed on the outer circumferential face of cup cover 139 constituted.Pump case 131 is made of clamshell 131a, shell pedestal 131b, axial region 131c.

When shared belt pulley 125, cup cover 139 and external magnet 141 rotated by the effect of belt 122, the magnetic line of force of this external magnet 141 will pass shell pedestal 131b and arrive outside the internal magnet 136.Give internal magnet 136 with rotatory force.Thereby pump rotor 132 begins to rotate.

Therefore, water pump 78 utilizes pump rotor 132 by drain passageway 143, eccentric pipe coupling 145, to supply to water inlet 146 places of cylinder block from sucking the water pressurization of path 142 inspirations.In addition, eccentric pipe coupling 145 is shown in figure (b), and inlet and export center only depart from the coupling of δ value.

Therefore, on figure (a), with eccentric pipe coupling 145 half-twist degree, in view of the above just can be as scheming shown in (b), be benchmark with the water inlet 146 of cylinder block, with 78 parallel mobile Δ values of water pump.

Turn back to Fig. 9 again, loose bolts 147,147, by arrow 2. direction rotate above-mentioned eccentric pipe coupling 145, by arrow 3. direction move shared belt pulley 125, improve the rate of tension of belt in view of the above, after the adjustment, tight a bolt 147,147.

Because being engaged in axial region 131c (seeing Figure 10 (b)) in the guiding ditch 128b and two bolts 147,147, water pump 78 utilization fixes, so can not move during except adjusting.

Figure 11 is the 11-11 line sectional view of Fig. 9, and AI leaf valve 150 will be delivered to exhaust ports by leaf valve 152 and at the AI mouth 153 that cylinder head 129H offers from the air that air inlet 151 is blown into.Because if the pressure height of AI mouth 153 1 sides, leaf valve 152 just cuts out, and does not flow backwards to air inlet 151 so worry air or waste gas.

Figure 12 is the schematic representation of the major component of expression movable valve mechanism related to the present invention.Though suction valve and outlet valve shape, material are different, essential structure is identical, describes with same-sign so annotate.

Allow valve guide bushing 163,163 face toward suction port 161 or the relief opening 162 of cylinder head 129H, the valve rod 165,165 of valve 164,164 can be slidably inserted in the valve guide bushing 163,163, front end at valve rod 165,165 is installed seat ring 166,166, be connected on the seat ring 166,166 by a end, valve 164,164 is pushed away towards closing direction valve spring 167,167.Utilize not shown cam, valve 164,164 is released to opening direction, utilize valve spring 167,167 that valve 164,164 is returned to closing direction by cup cover 169,169.

Figure 13 is the major component enlarged view of Figure 12, the 171st, and the air valve shaft sealing gasket is to keep bubble-tight part between valve rod 165 and the valve guide bushing 163.

The 172nd, valve spring cup is characterized in that, this valve spring cup 172 is the rings that roughly are the shaped sections that are made of bottom surface 174, the outward flange of turning up from this bottom surface 174 175 and inward flange 176.Above-mentioned bottom surface 174 is connected to cylinder head 129H and goes up the axial locating surface 173 that forms, outward flange 175 is got the diameter of the radial location face 177 that butt cylinder head 129H go up to form, inward flange 176 get and valve guide bushing 163 between the big diameter of external diameter of the ratio valve guide bushing 163 of certain interval is arranged.

Consequently, can dispose air valve shaft sealing gasket 171 in the inward flange 176, can shorten valve rod 165 significantly than the past.

Also have, the valve spring cup 172 that roughly is font cross section of the present invention is applicable to mini engine, but also can be used for medium-sized, big-block engine.

The present invention can bring into play following effect by above-mentioned structure.

According to the present invention program 1 formation, utilize the radial position of outward flange decision valve spring cup, by Inward flange is supported valve spring, so can shorten the height of valve rod, can shorten the height of valve, realizes gas The densification of door mechanism also can carry out the location of valve spring cup.

Claims (1)

1. the valve spring seat structure for IC of an internal-combustion engine, this valve spring cup is between an end and cylinder head of the valve spring that the valve with internal-combustion engine pushes away towards closing direction, it is characterized in that, this valve spring cup is by being connected to bottom surface that is formed at the axial locating surface on the cylinder head and the ring of turning up from this bottom surface that roughly is the shaped sections that outward flange and inward flange constituted, outward flange is its external diameter with the diameter that is connected to the radial location face that is formed on the cylinder head, and the internal diameter of inward flange is bigger than the external diameter of valve guide bushing.

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