WO2009098913A4 - 車両のパワーユニット - Google Patents
車両のパワーユニット Download PDFInfo
- Publication number
- WO2009098913A4 WO2009098913A4 PCT/JP2009/050197 JP2009050197W WO2009098913A4 WO 2009098913 A4 WO2009098913 A4 WO 2009098913A4 JP 2009050197 W JP2009050197 W JP 2009050197W WO 2009098913 A4 WO2009098913 A4 WO 2009098913A4
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- WO
- WIPO (PCT)
- Prior art keywords
- vehicle
- power unit
- crankcase
- centrifugal clutch
- transmission
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/035—Gearboxes for gearing with endless flexible members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M7/00—Motorcycles characterised by position of motor or engine
- B62M7/02—Motorcycles characterised by position of motor or engine with engine between front and rear wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
- F16D43/14—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members
- F16D43/18—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members with friction clutching members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K2202/00—Motorised scooters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/0004—Oilsumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/06—Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2300/00—Special features for couplings or clutches
- F16D2300/06—Lubrication details not provided for in group F16D13/74
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/0203—Gearboxes; Mounting gearing therein the gearbox is associated or combined with a crank case of an engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02039—Gearboxes for particular applications
- F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
- F16H2057/02065—Gearboxes for particular applications for vehicle transmissions for motorcycles or squads
Definitions
- the present invention relates to a power unit of a vehicle such as a motorcycle, and more particularly to an improvement in the arrangement of a wet centrifugal clutch and a partition between a crankshaft and the wet centrifugal clutch.
- a wet centrifugal clutch is disposed so as to communicate with each other.
- the space in which the crankshaft is disposed and the space in which the wet centrifugal clutch is disposed are connected by a relatively large opening, so a lubricating oil level suitable for each of the crankshaft and the wet centrifugal clutch is selected.
- a lubricating oil level suitable for each of the crankshaft and the wet centrifugal clutch is selected.
- the object of the present invention is to partition the crank shaft and the wet centrifugal clutch and set the lubricating oil level suitable for each, to secure the rigidity of the crankcase, to balance the weight on the left and right, to miniaturize, to clean, etc.
- the present invention is provided on a crankcase accommodating a crankshaft of an internal combustion engine, a drive pulley shaft rotating with the crankshaft, a driven pulley shaft parallel to the crankshaft, and these shafts.
- V-belt type continuously variable transmission composed of a driven pulley and a V-belt wound between a driven pulley and a transmission accommodating the V-belt type continuously variable transmission on one side of the crankcase A case, a power unit output shaft for transmitting the output of the internal combustion engine to the drive wheels of the vehicle through the power transmission means on the other side of the crankcase, the power unit of the driven pulley shaft disposed on one side of the crankcase
- a wet centrifugal clutch for intermittently transmitting to an output shaft, and a centrifugal clutch chamber for accommodating the wet centrifugal clutch, wherein the crankshaft is in the vehicle width direction
- the centrifugal clutch chamber accommodating the wet centrifugal clutch is
- a kick starting mechanism gear chamber is provided at a lower middle position between the crankshaft and the centrifugal clutch, and the kick starting mechanism gear chamber is in communication with the crank chamber.
- the center line of the cylinder bore and the V-belt type continuously variable transmission are mounted on the vehicle so as to be opposite to each other with respect to the center line of the vehicle main frame.
- crankcase and the transmission case are both cast products, and the clutch outer of the wet centrifugal clutch is provided on the joint surface between the crankcase and the transmission case.
- the V-belt can be provided on the outer side in the vehicle body width direction than the joint surface between the transmission case and the transmission cover.
- the fixed pulley half of the driven pulley be provided on the outer side in the vehicle body width direction than the joint surface between the transmission case and the transmission cover.
- the centrifugal clutch chamber accommodating the wet centrifugal clutch outside the crankcase, the crankshaft and the wet centrifugal clutch can be partitioned, and the setting of the lubricating oil level becomes easy, and partitioning is also possible. As a result, the rigidity of the crankcase can be easily secured. Further, since the wet centrifugal clutch is disposed on the outer side of the crankcase and the outer side thereof is closed by the transmission case, the centrifugal clutch chamber can be configured without adding additional parts, and the cost does not increase.
- a kick start mechanism gear chamber is provided at a lower middle position between the crankshaft and the centrifugal clutch, and the kick start mechanism gear chamber is in communication with the crank chamber, whereby the volume of the kick start mechanism gear chamber Since it can be used as a volume to be added to the oil pan chamber, it is possible to secure the optimum amount of oil and oil level.
- the left and right weight balance of the power unit is well maintained.
- the crankcase and the transmission case are both cast products, and the clutch outer of the wet centrifugal clutch is provided on the joint surface between the crankcase and the transmission case, whereby the following effects can be obtained. That is, the clutch outer is the largest component among the clutch components, and the opening of the case where the joint surface is provided is the widest because it is necessary to form a draft for case casting. Therefore, providing the largest component on the joint surface of the widest opening can contribute to the miniaturization of the transmission case.
- the V-belt can be easily replaced by providing the V-belt on the outer side in the vehicle body width direction than the joint surface between the transmission case and the transmission cover.
- the transmission cover which is easy to remove, occupies most of the transmission room, cleaning of the transmission room is facilitated.
- FIG. 1 is a side view of a motorcycle equipped with a power unit for a vehicle according to an embodiment of the present invention. It is a right view of the above-mentioned power unit. It is a left view of the above-mentioned power unit. It is an IV-IV cross-section developed view of FIG. 2 or FIG. FIG. 5 is a developed view of a VV cross section of FIG. 2 and FIG. 3;
- shift Machine case 68: Transmission cover, 70: Cylinder bore, 84: Crank chamber, 86: Reduction gear chamber, 87: Generator chamber, 89: Centrifugal clutch chamber, 90: Transmission chamber, 92: Drive pulley, 94: Driven Pulley, 95: Wet centrifugal clutch, 99: Kick start mechanism gear chamber, 121: clutch inner, 122: inner boss, 124: clutch weight, 125: clutch outer, 126: clutch output gear
- FIG. 1 is a side view of a motorcycle 1 equipped with a power unit 20 according to an embodiment of the present invention.
- one main frame 3 extends obliquely downward from the head pipe 2 at the front of the vehicle body to the rear and a pair of left and right pivot brackets 4 at the rear of the main frame 3, 4 extends downward and is fixed.
- a pair of left and right seat rails 5 extend diagonally upward from the vicinity of the fixed position of the pivot brackets 4 at the rear of the main frame 3 and bends halfway to reach the rear end.
- Middle frames 6, 6 are interposed between the central portions of the seat rails 5, 5 and the pivot brackets 4, 4.
- a storage box 7 and the like are provided between the pair of left and right seat rails 5 of the vehicle body frame F, and the seat 8 covers the upper side of the storage box 7 and the like so as to be freely opened and closed.
- a handle 9 pivotally supported by the head pipe 2 is provided above the front of the vehicle body, and a front fork 10 extends downward and a front wheel 11 is pivotally supported at its lower end.
- a rear fork 13 is pivotally supported at its front end by a pivot shaft 12 at pivot brackets 4 at the center of the vehicle body and extends rearward, and a rear wheel 14 is pivotally supported at the rear end of the rear fork 13.
- Rear cushions 15, 15 are interposed between the rear of the rear fork 13 which pivots up and down about the pivot shaft 12 and the seat rails 5, 5.
- a power unit 20 is suspended below the main frame 3 and in front of the pivot brackets 4, 4.
- the power unit 20 comprises an internal combustion engine 21 at the front and a power transmission 22 at the rear.
- the internal combustion engine 21 is a single-cylinder four-stroke internal combustion engine, and the cylinder block 24, the cylinder head 25 and the cylinder head cover 26 overlap from the front of the crankcase 23 and project substantially in a nearly horizontal position.
- a throttle body 28 is connected to an intake pipe 27 extending above the cylinder head 25.
- an exhaust pipe 29 extending downward of the cylinder head 25 and bent rearward extends rearward and is connected to the right muffler 30 of the rear wheel 14.
- FIG. 2 is a right side view of the power unit 20.
- the outer shell of the power transmission device 22 will be described later with reference to FIG. 4, but the crankcase 23 includes left and right split crankcases 23L and 23R, and the right crankcase 23R is shown in the figure.
- a support bracket 31 is vertically provided at the center of the main frame 3 of the vehicle.
- Mount brackets 23a, 23a respectively projecting from the upper surfaces of the left and right crankcases 23L, 23R of the power unit 20 are suspended from the support bracket 31 via a support shaft 16.
- Mounting brackets 23b, 23b respectively projecting from the upper rear surface of the crankcases 23L, 23R are supported by the support shaft 17 on the upper portion of the pivot bracket 4.
- Mounting brackets 23c, 23c respectively projecting from lower portions of the rear faces of the crankcases 23L, 23R are supported by the support shaft 18 at the lower portion of the pivot bracket 4. With these supports, the power unit 20 is fixed to the vehicle body frame F below the main frame 3 and in front of the pivot bracket 4.
- the vehicle body frame F is covered by a synthetic resin cover member 32 (FIG. 1) divided into each part.
- the power transmission device 22 is composed of a V-belt type continuously variable transmission 35 and a reduction gear mechanism 36.
- the position of each rotation shaft of this power transmission 22 is shown by the figure.
- a crankshaft 37 of the internal combustion engine 21 is provided at the front of the crankcase 23.
- the right extension of the crankshaft 37 is the drive pulley shaft 38 of the V-belt type continuously variable transmission 35.
- the driven pulley shaft 39 of the V-belt type continuously variable transmission 35 is provided at the rear of the crankcase.
- a V belt 40 is wound around a drive pulley 92 and a driven pulley 94 provided on the drive pulley shaft 38 and the driven pulley shaft 39, thereby forming a V-belt type continuously variable transmission 35.
- a wet centrifugal clutch 95 having substantially the same diameter as the driven pulley 94 is provided on the left side portion 39L of the driven pulley shaft 39 of the V-belt type continuously variable transmission 35.
- a left portion 39 L of 39 is an input portion of the reduction gear mechanism 36.
- the rotation shaft of the reduction gear mechanism 36 includes the left portion of the driven pulley shaft 39, the reduction gear mechanism intermediate shaft 41, and the power unit output shaft 43, and the reduction gear mechanism 36 is configured by a gear group provided on these shafts. ing.
- the power unit output shaft 43 projects leftward from the rear of the left crankcase 23L. The rotational driving force of the power unit 20 is output via the power unit output shaft 43.
- a power transmission chain 47 is bridged between a power transmission chain drive sprocket 45 fitted to the power unit output shaft 43 and a power transmission chain driven sprocket 46 (FIG. 1) integrally provided on the rear wheel 14, and a power unit Twenty rotational driving forces are transmitted to the rear wheel 14.
- FIG. 3 is a left side view of the power unit 20.
- the outer shell of the illustrated power transmission device 22 is a left crankcase 23L and an opening peripheral wall 106 provided on the side of the left crankcase 23L.
- the power unit 20 is provided with a motor starting mechanism 48 and a kick starting mechanism 49.
- the motor starting mechanism 48 includes a drive pinion 51 of the starter motor 50, a motor starting mechanism intermediate shaft 52, gears of various sizes provided on the intermediate shaft 52, and a motor starting mechanism driven gear 53 provided on the left of the crankshaft 37. It is composed of
- the motor starting mechanism 48 is a speed reducing mechanism.
- the kick start mechanism 49 is provided on the kick shaft 54, the kick arm 56, the kick pedal 57, the first intermediate shaft 58, the second intermediate shaft 60, a gear group provided on these shafts, and the right portion of the crankshaft 37. It comprises the kick start mechanism driven gear 63 and the like.
- the kick starting mechanism 49 is a speed increasing mechanism.
- FIG. 4 is a cross-sectional view of the power unit 20 developed along the line IV-IV of FIG. 2 or FIG.
- a cylinder block 24, a cylinder head 25 and a cylinder head cover 26 are provided in order in front of the crankcase 23 to form an outer shell of the internal combustion engine 21.
- a piston 71 reciprocating in the cylinder bore 70 of the cylinder block 24 and a crankshaft 37 are connected by a connecting rod 74 via a piston pin 72 and a crank pin 73.
- the internal combustion engine 21 adopts a SOHC type valve system, a valve operating mechanism 75 is provided in the cylinder head cover 26, and a cam chain 76 for transmitting power to the valve operating mechanism 75 is located on the left of the crankshaft 37.
- the cam chain chamber 80 is bridged between the cam chain driving sprocket 77 fitted to the one extension 37L and the cam chain driven sprocket 79 fitted to the left end of the camshaft 78, and the cam chain chamber 80 for that purpose is the left crank
- the case 23 ⁇ / b> L, the cylinder block 24, and the cylinder head 25 are provided in communication with each other.
- a combustion chamber 81 is formed on an end face of the cylinder head 25 on the cylinder block 24 side, and an ignition plug 82 is fitted from the right outside of the cylinder head 25 toward the combustion chamber 81.
- the shell of the power transmission device 22 of the power unit 20 includes a crankcase 23 formed by combining the left crankcase 23L and the right crankcase 23R, a generator cover 66 provided on the left side of the left crankcase 23L, and the right crankcase A transmission case 67 provided on the right side of 23 R and a transmission cover 68 covering the right side of the transmission case 67 are provided.
- a crank chamber 84 and a reduction gear chamber 86 are formed in the internal space of the crankcase 23.
- the crankshaft 37 is rotatably supported by the left and right crankcases 23L and 23R via bearings 85A and 85B.
- the crankshaft 37 is disposed in the vehicle width direction (left and right direction).
- a part of the reduction gear mechanism 36 is accommodated in the reduction gear chamber 86.
- the motor start mechanism driven gear 53 is rotatably supported on the left side of the cam chain drive sprocket 77, and the outer boss portion 100 of the AC generator 88 is fitted on the left side thereof.
- a one-way clutch 101 is interposed between the motor start mechanism driven gear 53 and the outer boss portion 100.
- a caged outer rotor 102 is fixed to the outer boss portion 100, and a stator provided with a stator coil inside a magnet 103 disposed circumferentially on the inner peripheral surface of the outer rotor 102.
- 105 is fixed to the inner surface of the generator cover 66.
- the generator cover 66 covers the outer rotor 102 and is attached to the opening peripheral wall 106 (see also FIG. 3) of the side wall of the left crankcase 23L.
- a centrifugal clutch chamber 89 is provided between the right crankcase 23R and the transmission case 67, and a transmission chamber 90 is provided between the transmission case 67 and the transmission cover 68.
- the crankshaft 37 extends to the centrifugal clutch chamber 89 on the right side of the bearing 85B of the right crankcase 23R, and further extends to the transmission chamber 90 through the seal member 91 of the transmission case 67.
- a kick start mechanism driven gear 63 is spline fitted to a portion of the crankshaft 37 which extends to the centrifugal clutch chamber 89.
- the portion of the crankshaft 37 extending to the transmission chamber 90 is the drive pulley shaft 38 of the V-belt continuously variable transmission 35, and the drive pulley shaft 38 of the V-belt continuously variable transmission 35 is a drive pulley 92. Provided integrally.
- the driven pulley shaft 39 of the V-belt type continuously variable transmission 35 is supported by the right crank case 23R and the transmission case 67 via bearings 93A and 93B, and the driven pulley shaft 39 in the transmission chamber 90
- the driven pulley 94 of the V-belt type continuously variable transmission 35 is provided in the portion.
- a wet centrifugal clutch 95 and a clutch output gear 126 are provided in a portion of the driven pulley shaft 39 in the centrifugal clutch chamber 89.
- a seal member 96 is interposed in the bearing opening of the transmission case 67 through which the driven pulley shaft 39 passes through the bearing 93B.
- the transmission chamber 90 in which the V-belt type continuously variable transmission 35 is accommodated is separated from the centrifugal clutch chamber 89 by the transmission case 67, and the opening communicating with the centrifugal clutch chamber 89 is the seal member 91 as described above.
- a seal 96 is formed to prevent the lubricating oil in the centrifugal clutch chamber 89 from leaking into the transmission chamber 90.
- the drive pulley 92 of the V-belt type continuously variable transmission 35 comprises a fixed pulley half 108 and a movable pulley half 109.
- the fixed pulley half 108 is integrally fixed to the drive pulley shaft 38, and the movable pulley half 109 on its left side is axially in a sleeve 111 for fixing the cam plate 110 fitted to the drive pulley shaft 38. It is slidably supported.
- the side surface of the movable pulley half 109 on the cam plate 110 side is inclined toward the cam plate 110, and the weight roller 113 is accommodated between the inside of the inclined surface and the cam plate 110. Therefore, when the rotational speed of the drive pulley shaft 38 increases, the weight roller 113 moves in the centrifugal direction by centrifugal force, and the movable pulley half 109 is pushed by the weight roller 113 and moves to the right to move the fixed pulley half 108.
- the V-shaped belt 40 sandwiched between the two pulley halves 108 and 109 is moved in the centrifugal direction to increase the winding diameter.
- a sleeve 115 fitted from the right to a portion in the transmission chamber 90 of the driven pulley shaft 39 of the V-belt type continuously variable transmission 35 is tightened with the inner race of the bearing 93B by the fastening of the nut 116.
- the fixed pulley half 117 is fixed to the sleeve 115 integrally with the driven pulley shaft 39, and the movable pulley half 118 on the right side of the fixed pulley half 117 is a sleeve 115 via an annular slider 119. , And is urged leftward by a spring 120.
- the driven pulley 94 is composed of the two pulley halves 117 and 118 described above, and the V-belt 40 is held by the two pulley halves 117 and 118.
- the V-belt type continuously variable transmission 35 is configured as described above, the power of the drive pulley shaft 38 (i.e., the crankshaft 37) is transmitted to the driven pulley shaft 39 via the V belt 40, and the drive pulley shaft As the rotational speed of 38 increases, the movable pulley half 109 of the drive pulley 92 approaches the fixed pulley half 108 by the centrifugal movement of the weight roller 113, and the V-belt is sandwiched between the two halves 108 and 109.
- the winding diameter of the V-belt 40 is increased, and the diameter of the V-belt 40 pinched between the fixed pulley half 117 and the movable pulley half 118 of the driven pulley 94 on the driven pulley shaft 39 is decreased. A stepless shift is made.
- a wet centrifugal clutch 95 is provided on the left portion 39L of the driven pulley shaft 39 in the centrifugal clutch chamber 89.
- the inner boss portion 122 holding the base end of the clutch inner 121 is spline-fitted to the driven pulley shaft 39, and clutch weights are respectively provided to a plurality of support shafts 123 protruding from the outer peripheral end of the clutch inner 121.
- 124 is pivotally supported.
- the cylindrical portion of the clutch outer 125 covers the clutch inner 121 with the inner peripheral surface facing the clutch weight 124.
- the clutch output gear 126 is relatively rotatably supported via the needle bearing 127 at the left end of the driven pulley shaft 39, and the base end of the clutch outer 125 is welded and fixed to the boss of the clutch output gear 126. .
- the rotational speed of the driven pulley shaft 39 exceeds a predetermined speed, the tilting of the clutch weight 124 is increased to act on the clutch outer 125 and the clutch is engaged, and the clutch outer 125 starts to rotate. Even start to rotate.
- the reduction gear mechanism 36 is provided between the driven pulley shaft 39 of the V-belt type continuously variable transmission 35 and the power unit output shaft 43 behind the same.
- the intermediate shaft 41 of the reduction gear mechanism is supported by the left and right crankcases 23L and 23R via bearings 97A and 97B, and the intermediate shaft large diameter gear 42 is fitted in a portion in the centrifugal clutch chamber 89, and the reduction gear An intermediate shaft small diameter gear 41 a is cut in a portion in the chamber 86.
- the large diameter gear 42 of the intermediate shaft 41 is in mesh with the clutch output gear 126.
- the power unit output shaft 43 is supported on the left and right crankcases 23L and 23R via bearings 98A and 98B, and the output shaft large diameter gear 44 is fitted in the inside of the reduction gear chamber 86, and the left side of the left crankcase A power transmission chain drive sprocket 45 is fitted in a portion extending to the end.
- the large diameter gear 44 of the power unit output shaft 43 meshes with the small diameter gear 41 a of the reduction gear mechanism intermediate shaft 41.
- the reduction gear mechanism 36 is configured as described above, and the rotation of the clutch output gear 126 is decelerated and transmitted to the reduction gear mechanism intermediate shaft 41 by meshing with the large diameter gear 42, and the rotation of the reduction gear mechanism intermediate shaft 41 Is transmitted to the power unit output shaft 43 by meshing between the small diameter gear 41a and the large diameter gear 44, and penetrates the left crankcase 23L of the power unit output shaft 43 and is fitted to the left end projecting to the outside. Since the gear 45 is decelerated and rotated, the decelerated rotational power of the drive sprocket 45 rotates the rear wheel 14 via the power transmission chain 47 (FIG. 1) to cause the motorcycle 1 to travel.
- line A is the left side outline of the main frame 3 of the vehicle body
- line B is the right side outline of the main frame 3
- line CC is the center line of the vehicle body main frame.
- B line D-D is the center line of the cylinder bore 70
- line E is the joint surface of the left and right crankcases 23L, 23R
- line F is the joint surface of the right crankcase 23R and the transmission case 67
- line G is a joint surface between the transmission case 67 and the transmission cover 68.
- the center line DD of the cylinder bore 70 and the V-belt type continuously variable transmission 35 are mounted on opposite sides of the center line CC of the vehicle body main frame 3. By this arrangement, the left-right weight balance of the power unit 20 is well maintained.
- Both the crankcase 23 and the transmission case 67 are cast products.
- a clutch outer 125 of a wet centrifugal clutch 95 is provided on a joint surface F between the right crankcase 23R and the transmission case 67.
- the clutch outer 125 is the largest of the clutch components.
- the openings of the cases 23 and 67 provided with the joint surfaces are the widest. By providing the largest parts on the joint surface of the widest opening, it contributes to the miniaturization of the transmission case.
- the V-belt 40 is provided on the outer side in the vehicle body width direction than a joint surface G of the transmission case 67 and the transmission cover 68.
- the transmission cover 68 which is easy to remove, occupies most of the transmission chamber 90, cleaning of the inside of the transmission chamber 90 is easy.
- the fixed pulley half 117 of the driven pulley 94 is provided on the outer side in the vehicle width direction than the joint surface G between the transmission case 67 and the transmission cover 68, cleaning in the transmission chamber 90 is easier. .
- FIG. 5 is a cross-sectional development view taken along the line V-V of FIGS. 2 and 3, and is a cross-sectional development view of the kick starting mechanism 49 shown in the lower part in the side view of the crankcase 23 of FIG.
- the kick shaft 54 is disposed below the driven pulley shaft 39 of the V-belt type continuously variable transmission 35.
- a kick start mechanism gear chamber 99 is provided at an intermediate lower position between the crankshaft 37 and the wet centrifugal clutch 95, and the kick start mechanism gear chamber 99 communicates with the crank chamber 84.
- the volume of the kick start mechanism gear chamber 99 can be used as a volume to be added to the oil pan chamber provided at the lower part of the crank chamber 84, so that the optimum oil amount and oil level are secured. can do.
- the kick shaft 54 is rotatably supported by the left and right crankcases 23L and 23R, and is provided in the kick start mechanism gear chamber 99.
- the kick start mechanism gear chamber 99 communicates with the crank chamber 84.
- the proximal end portion of the kick arm 56 for start is fitted to the kick shaft 54.
- a kick pedal 57 is attached to the leading end of the kick arm 56 so as to be able to fall down.
- the bearing portion 135 of the left crankcase 23L has a thick cylindrical shape and bulges leftward, and the left end of the kick shaft 54 penetrates the bearing portion 135 and protrudes leftward.
- the right end of the kick shaft 54 is pivotally supported by the right bulging portion of the right crankcase 23R, and a return spring 64 accommodated in the bulging portion is wound around the kick shaft 54.
- the kick shaft 54 is biased to rotate with the kick arm 56 to the operation start position.
- a stopper member 131 is spline-fitted to the right end portion of the kick shaft 54, and a protrusion of the stopper member 131 abuts on a protrusion 132 provided on the right crankcase 23R, and the kick arm biased by a return spring 64 56 is held at a predetermined operation start position.
- a large diameter kick drive gear 55 is engaged with the kick shaft 54 by serration.
- a short first intermediate shaft 58 is rotatably supported by the left and right crankcases 23L and 23R in front of the kick shaft 54, and a long second intermediate shaft 60 further extends in front of the first intermediate shaft 58.
- the left and right crankcases 23L and 23R and the transmission case 67 are rotatably supported. Since the second intermediate shaft 60 penetrates the right crankcase 23R, it is provided straddling the crank chamber 84 and the centrifugal clutch chamber 89.
- a small diameter gear 58 a is cut and a large diameter gear 59 is serrated in the first intermediate shaft 58, and the small diameter gear 58 a is engaged with the large diameter kick drive gear 55.
- a small diameter gear 60 a is formed in the vicinity of the support portion at the left end of the second intermediate shaft 60 and is engaged with the large diameter gear 59.
- a driven helical gear 133 is provided in a portion of the second intermediate shaft 60 in the centrifugal clutch chamber 89.
- Helical outer teeth 60 h are engraved on the outer peripheral surface of the second intermediate shaft 60.
- Helical internal teeth 133h are engraved on the inner peripheral surface of the driven helical gear 133, and are engaged with the helical external teeth 60h.
- a friction spring 134 (see FIG. 2) having a partially broken annular ring is fitted and tightened in a groove formed along the circumferential direction on the outer peripheral surface of the driven helical gear 133, and the friction for rotation of the driven helical gear 133 Is given.
- the tip of the handle portion 134a extending outward from the partial loss ring of the friction spring 134 is slidable in the lateral groove 23x (see FIG. 2) of the protrusion formed on the right crankcase 23R. It is fitting.
- a large diameter gear 61 is pivotally supported on the right of the driven helical gear 133 so that the large diameter gear 61 is spline-fitted to the crankshaft 37. It is in mesh with the driven gear 63.
- ratchet teeth 133r are formed protruding along the peripheral edge.
- a ratchet tooth 61r which can be engaged with the ratchet tooth 133r of the driven helical gear 133 is formed in a protruding manner to constitute a ratchet mechanism.
- the kick start mechanism 49 is configured as described above, and when the kick pedal 57 is depressed and the kick shaft 54 rotates against the return spring 64, the large diameter kick drive gear 55 integrated with the kick shaft 54
- the large diameter gear 59 rotating together with the first intermediate shaft 58 rotates with an increase in speed of the first intermediate shaft 58 due to the engagement of the kick drive gear 55 and the small diameter gear 58a, and the small diameter of the second intermediate shaft 60
- the second intermediate shaft 60 is further accelerated to rotate by meshing with the gear 60a.
- the driven helical gear 133 engaged with the helical outer teeth 60h integrally rotating with the second intermediate shaft 60 with the helical inner teeth 133h is prevented from rotating by the frictional resistance in the rotational direction by the friction spring 134 Since the driven helical gear 133 moves rightward, its ratchet teeth 133r mesh with the ratchet teeth 61r of the large diameter gear 61, and the driven helical gear 133 and the large diameter gear 61 rotate together with the second intermediate shaft 60. Further, the crankshaft 37 is forcibly rotated by the meshing of the large diameter gear 61 and the kick start mechanism driven gear 63, and the internal combustion engine 21 is started.
- the return spring 64 returns the kick shaft 54 together with the kick arm 56 to the original operation start position, so the first intermediate shaft 58 and the second intermediate shaft 60 reversely rotate.
- the driven helical gear 133 is moved leftward by the meshing of the helical teeth 60h and 133h, and the engagement of the ratchet teeth 61r and 133r is released.
- crank chamber 84 and the centrifugal clutch chamber 89 are partitioned via the right crankcase 23R by disposing the centrifugal clutch chamber 89 accommodating the wet centrifugal clutch 95 on the outside of the crankcase 23, the crank It is easy to set the lubricating oil level suitable for each of the shaft 37 and the wet centrifugal clutch 95. Further, by dividing the two chambers, the rigidity of the crankcase 23 is also secured. Further, since the wet centrifugal clutch 95 is disposed on the outer side of the crankcase 23 and the outer side thereof is closed by the transmission case 67, the centrifugal clutch chamber 89 can be configured without adding another part, so that cost There is no rise.
- the volume of the kick start mechanism gear chamber 99 can be used as a volume to be added to the oil pan chamber, so the optimum oil amount and oil level Can be secured.
- the center line of the cylinder bore 70 and the V-belt type continuously variable transmission 35 are mounted on opposite sides with respect to the center line of the vehicle body main frame 3, so that the left-right weight balance of the power unit 20 is good. .
- the clutch outer 125 is provided on the joint surface F between the right crankcase 23R and the transmission case 67. In order to form a draft for case casting, the opening of the case 23, 67 provided with the joint surface is the widest.
- the largest component is provided on the joint surface of the widest opening, which can contribute to the miniaturization of the transmission case 67.
- the V-belt 40 is provided outside the joint surface G between the transmission case 67 and the transmission cover 68, the V-belt 40 can be easily replaced.
- the transmission cover 68 which is easy to remove, occupies most of the transmission chamber 90, cleaning of the inside of the transmission chamber 90 is facilitated.
- the fixed pulley half 117 of the driven pulley 94 is provided outside the joint surface G between the transmission case 67 and the transmission cover 68, cleaning of the inside of the transmission chamber 90 is further facilitated.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Details Of Gearings (AREA)
- Arrangement Of Transmissions (AREA)
- Transmissions By Endless Flexible Members (AREA)
Abstract
Description
また、湿式遠心クラッチをクランクケースの外側に配置し、その外側を変速機ケースにて塞いだので、別部品を追加することなく遠心クラッチ室を構成することができ、コストの上昇が生じない。
クランク軸37の、変速機室90へ延出した部分はVベルト式無段変速機35の駆動プーリ軸38となっており、駆動プーリ軸38にVベルト式無段変速機35の駆動プーリ92が一体に設けてある。
クランク軸37と湿式遠心クラッチ95との中間下方にキック始動機構歯車室99が設けられ、上記キック始動機構歯車室99はクランク室84と連通している。このような配置となっているので、キック始動機構歯車室99の容積を、クランク室84の下部に設けられるオイルパン室に追加される容積として利用できるので、最適なオイル量とオイルレベルを確保することができる。
(1)湿式遠心クラッチ95を収容する遠心クラッチ室89をクランクケース23の外側に配置することによって、クランク室84と遠心クラッチ室89とを、右クランクケース23Rを介して仕切っているので、クランク軸37と湿式遠心クラッチ95のそれぞれに適した潤滑オイルレベルの設定が容易である。また、上記両室を仕切ることによって、クランクケース23の剛性も確保される。また、湿式遠心クラッチ95をクランクケース23の外側に配置し、その外側を変速機ケース67にて塞いだので、別部品を追加することなく遠心クラッチ室89を構成することができるので、コストの上昇が生じない。
(2)キック始動機構歯車室99がクランク室84と連通しているので、キック始動機構歯車室99の容積を、オイルパン室に追加される容積として利用できるので、最適なオイル量とオイルレベルを確保することができる。
(3)シリンダボア70の中心線とVベルト式無段変速機35とが、車体メインフレーム3の中心線に関して互いに反対側に位置するように搭載されるので、パワーユニット20の左右の重量バランスが良い。
(4)右クランクケース23Rと変速機ケース67との接合面F上にクラッチアウタ125が設けられている。ケース鋳造のための抜き勾配を形成する必要上、接合面が設けられるケース23,67の開口部は最も広くなる。もっとも大きい部品を最も広い開口部の接合面上に設けてあるので、変速機ケース67の小型化に寄与することができる。
(5)Vベルト40が、変速機ケース67と変速機カバー68との接合面Gより外側に設けられているので、Vベルト40の交換が行い易い。また、変速機室90の大半を取り外し容易な変速機カバー68が占めるので、変速機室90内の掃除が容易となる。
(6)従動プーリ94の固定プーリ半体117が、変速機ケース67と変速機カバー68との接合面Gより外側に設けられているので、変速機室90内の掃除が更に容易になる。
Claims (6)
- 内燃機関のクランク軸を収容するクランクケース、
上記クランク軸と共に回転する駆動プーリ軸と、上記クランク軸と平行な従動プーリ軸と、これらの軸に設けられた駆動プーリと従動プーリとの間に巻き掛けられたVベルトとで構成されるVベルト式無段変速機、
上記クランクケースの一側において上記Vベルト式無段変速機を収容する変速機ケース、上記クランクケースの他側において上記内燃機関の出力を動力伝達手段を介して車両の駆動輪に伝達するパワーユニット出力軸、
上記クランクケースの一側に配置され上記従動プーリ軸の動力を上記パワーユニット出力軸に断続的に伝える湿式遠心クラッチ、及び
上記湿式遠心クラッチを収容する遠心クラッチ室を備え、
上記クランク軸が車幅方向を向くよう車両に搭載される車両のパワーユニットにおいて、
湿式遠心クラッチを収容する上記遠心クラッチ室が、クランクケースの外側に配置され、上記遠心クラッチ室の車幅方向外側が変速機ケースによって塞がれていることを特徴とする車両のパワーユニット。 - 側面視にて、クランク軸と遠心クラッチとの中間下方にキック始動機構歯車室が設けられ、上記キック始動機構歯車室はクランク室と連通していることを特徴とする請求項1に記載の車両のパワーユニット。
- シリンダボアの中心線とVベルト式無段変速機とが、車体メインフレームの中心線に関して互いに反対側に位置するように車両に搭載されることを特徴とする請求項1または請求項2に記載の車両のパワーユニット。
- クランクケースと変速機ケースとは何れも鋳造品であり、且つクランクケースと変速機ケースとの接合面上に上記湿式遠心クラッチのクラッチアウタが設けられることを特徴とする請求項1ないし請求項3に記載の車両のパワーユニット。
- Vベルトが、変速機ケースと変速機カバーとの接合面より車体幅方向外側に設けられることを特徴とする請求項1乃至請求項4に記載の車両のパワーユニット。
- 従動プーリの固定プーリ半体が、変速機ケースと変速機カバーとの接合面より車体幅方向外側に設けてあることを特徴とする請求項5に記載の車両のパワーユニット。
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CN2009801040198A CN101932472B (zh) | 2008-02-04 | 2009-01-09 | 用于车辆的动力单元 |
BRPI0908526A BRPI0908526A2 (pt) | 2008-02-04 | 2009-01-09 | unidade de potência para veículo |
EP09707562.6A EP2241469A4 (en) | 2008-02-04 | 2009-01-09 | DRIVE UNIT OF A VEHICLE |
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JP (1) | JP5314290B2 (ja) |
CN (1) | CN101932472B (ja) |
BR (1) | BRPI0908526A2 (ja) |
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CN103158539B (zh) * | 2011-12-12 | 2016-01-06 | 光阳工业股份有限公司 | 车辆传动装置 |
US9103428B2 (en) * | 2013-03-15 | 2015-08-11 | Kawasaki Jukogyo Kabushiki Kaisha | Structure for coupling V-belt type continuously variable transmission with engine |
CN104110302B (zh) * | 2013-04-17 | 2017-04-12 | 光阳工业股份有限公司 | 引擎 |
TWI575850B (zh) * | 2016-02-24 | 2017-03-21 | Variable speed power generation module | |
TWI575851B (zh) * | 2016-02-24 | 2017-03-21 | Variable speed power generation device | |
WO2020066878A1 (ja) * | 2018-09-25 | 2020-04-02 | 本田技研工業株式会社 | 鞍乗り型車両のパワーユニット |
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JPS5799480A (en) * | 1980-12-09 | 1982-06-21 | Honda Motor Co Ltd | Automatic tricycle |
JPS6250372U (ja) * | 1985-09-18 | 1987-03-28 | ||
JP2003222159A (ja) * | 2002-01-29 | 2003-08-08 | Yamaha Motor Co Ltd | 自動二輪車用クラッチ装置 |
ES2337352T3 (es) * | 2002-04-08 | 2010-04-23 | Yamaha Hatsudoki Kabushiki Kaisha | Estructura lubricante de mecanismo de embrague de motor. |
JP2006082631A (ja) * | 2004-09-15 | 2006-03-30 | Kawasaki Heavy Ind Ltd | 作業車およびそのエンジンとトランスミッションとの組立体 |
JP5046372B2 (ja) * | 2007-01-26 | 2012-10-10 | ヤマハ発動機株式会社 | 自動二輪車 |
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CN101932472A (zh) | 2010-12-29 |
WO2009098913A1 (ja) | 2009-08-13 |
EP2241469A1 (en) | 2010-10-20 |
JP5314290B2 (ja) | 2013-10-16 |
JP2009184399A (ja) | 2009-08-20 |
CN101932472B (zh) | 2013-08-21 |
EP2241469A4 (en) | 2016-08-10 |
TWI365817B (en) | 2012-06-11 |
TW200940374A (en) | 2009-10-01 |
BRPI0908526A2 (pt) | 2019-02-26 |
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