WO2011027445A1 - Vベルト式無段変速機の冷却風取入れ構造 - Google Patents
Vベルト式無段変速機の冷却風取入れ構造 Download PDFInfo
- Publication number
- WO2011027445A1 WO2011027445A1 PCT/JP2009/065404 JP2009065404W WO2011027445A1 WO 2011027445 A1 WO2011027445 A1 WO 2011027445A1 JP 2009065404 W JP2009065404 W JP 2009065404W WO 2011027445 A1 WO2011027445 A1 WO 2011027445A1
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- WIPO (PCT)
- Prior art keywords
- cooling air
- air intake
- air passage
- case
- transmission case
- Prior art date
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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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0487—Friction gearings
- F16H57/0489—Friction gearings with endless flexible members, e.g. belt CVTs
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/08—Air inlets for cooling; Shutters or blinds therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J50/00—Arrangements specially adapted for use on cycles not provided for in main groups B62J1/00 - B62J45/00
- B62J50/30—Means for ventilation within devices provided on the cycle, e.g. ventilation means in a battery container
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- 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
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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
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/10—Road Vehicles
- B60Y2200/12—Motorcycles, Trikes; Quads; Scooters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/10—Road Vehicles
- B60Y2200/12—Motorcycles, Trikes; Quads; Scooters
- B60Y2200/126—Scooters
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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
- 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
-
- 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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
- F16H57/0416—Air cooling or ventilation
Definitions
- the V-belt type continuously variable transmission generates frictional heat at the contact portion between the drive pulley and the driven pulley and the V-belt.
- the present invention relates to a structure for taking in cooling air from the outside to a V-belt type continuously variable transmission when it is necessary to cool the above-mentioned constituent members.
- Patent Document 1 shows a conventional cooling air intake structure.
- the air intake is opened toward the rear of the vehicle, and the muddy water taken up from the rear wheel of the vehicle is taken into consideration while muddy water, dust, etc. from the front of the vehicle are taken into consideration. And there was a risk that dust could enter.
- the present invention seeks to provide a cooling air intake structure that prevents muddy water and dust from entering the front and rear of the vehicle.
- the present invention solves the above-mentioned problems, and the present invention is In the cooling air intake structure of a V-belt type continuously variable transmission provided on the side of the rear wheel of a small vehicle, An external cooling air intake port is provided on the side of the transmission case and at the upper side of the drive pulley portion with respect to the cooling fan side opening of the transmission case, and the cooling fan side opening from the cooling air intake port
- the present invention relates to a cooling air intake structure of a V-belt type continuously variable transmission characterized in that a cooling air passage leading to the above is formed in the periphery of a cooling fan side opening of a transmission case.
- the preferred embodiment of the present invention is
- the cooling air passage takes in the cooling air from the cooling air intake provided at the upper side of the transmission case, guides it upward, turns it downward in a U shape, and opens the cooling fan on the side of the transmission case. It is formed to lead.
- the preferred embodiment of the present invention is The cooling air inlet is formed along the edge of the vehicle body cover.
- the preferred embodiment of the present invention is
- the vehicle body cover is provided with a footrest for the passenger, and the cooling air passage is formed in an inner space of the vehicle body cover below the footrest.
- the preferred embodiment of the present invention is In the air cleaner provided at the upper part of the transmission case, the air cleaner is provided at the upper part of the cooling air passage case in which the cooling air passage having the U-shaped folded part is formed.
- the preferred embodiment of the present invention is The cooling air passage is formed in a cooling air passage case which covers the cooling fan side opening of the transmission case and is attached to the drive pulley side flat portion of the transmission case.
- the preferred embodiment of the present invention is The cooling air passage case is attached to the transmission case by means of fastening members distributed in the front and back of the periphery of the cooling fan side opening.
- the preferred embodiment of the present invention is The cooling air inlet is at least partially provided laterally within the diameter of the drive pulley of the V-belt continuously variable transmission.
- the preferred embodiment of the present invention is In the cooling air passage case, the cooling air is bent in a U-shape and then descends downward, and is further bent in an L-shape rearward and guided to the cooling fan side opening.
- the preferred embodiment of the present invention is The cooling air passage case is attached to the transmission case via a vibration isolation member.
- the cooling air passage forming member can be miniaturized. Furthermore, it is advantageous to the flow of mud water along the upper surface of the transmission case accommodating the V-belt type continuously variable transmission.
- Mud water, dust and the like can be separated from the cooling air by the U-shaped folded portion. As a result, if a filter is provided, its life can be extended.
- the vehicle body cover can easily prevent the entry of foreign matter into the cooling air intake.
- the flow of the cooling air toward the cooling air intake can be made to flow smoothly using the above-mentioned inner space, and the cooling efficiency Can be improved.
- the flow of the intake air toward the air cleaner inlet can be smoothed by the cooling air passage portion, and the performance of the internal combustion engine can be improved.
- cooling air passage case Since the cooling air passage case is attached to the drive pulley side flat portion, it can absorb the intake vibration noise generated when the intake air passes through the cooling fan side opening of the transmission case to improve the noise prevention effect. it can.
- the cooling air passage case is mounted by means of the fastening members distributed around the periphery of the cooling fan side opening, so that stable mounting can be performed.
- the leakage of the cooling air from the gap is prevented, and the noise prevention effect can be further improved.
- FIG. 1 is a side view of a motorcycle 2 according to an embodiment of the present invention.
- FIG. 2 is a left cross-sectional view of a vertical cross section of the power unit 1;
- FIG. 3 is a cross-sectional view taken along the line III-III in FIG. It is a horizontal sectional view of transmission case left-hand side member 37L. It is a left view of the transmission case left side member 37L. It is a horizontal sectional view of cooling air passage case inner side member 50A. It is a left view of cooling air passage case inner side member 50A. It is a horizontal sectional view of cooling air passage case outer side member 50B. It is a left surface (outer surface) figure of cooling air passage case outer side member 50B.
- FIG. 18 is a horizontal cross-sectional view of an assembled state of the transmission case left side member 37L and the cooling air passage case 50.
- 5 is a perspective view of a cooling air passage 70 in the cooling air passage case 50.
- FIG. FIG. 18 is a left side view of a state in which a transmission case left side member 37L and a cooling air passage case 50 are assembled to the transmission 17. It is a left view which shows the power unit 1 and its peripheral part.
- FIG. 1 is a side view of a motorcycle 2 equipped with a power unit 1 according to an embodiment of the present invention.
- the body frame of the motorcycle 2 includes a head pipe, a main frame extending backward from the head pipe, a pair of left and right rear frames connected at one end to the rear of the main frame and extending rearward, and a plurality of other frames.
- a front wheel 4 is supported at the lower end of a front fork 3 rotatably supported by a head pipe, and a steering handle 5 is connected to an upper portion of the front fork 3.
- the power unit 1 is suspended on a bracket fixed to the rear frame via a hanger 6 (FIG. 2) integrally formed at the front part thereof and a support shaft 7.
- a rear cushion 8 is provided between a bracket 14 (FIG. 2) provided at the rear end of the power unit 1 and a rear bracket of the rear frame.
- the power unit 1 is swingably suspended with the cylinder axis slightly upward.
- a rear wheel 10 is attached to a rear axle 9 (FIG. 3) projecting rightward from the rear of the power unit 1 and driven by the power unit 1.
- An air cleaner 11 is provided above the power unit 1.
- a vehicle body cover 13 made of a plurality of members and made of synthetic resin is attached to the vehicle body frame, and covers the power unit 1 and other devices.
- FIG. 2 is a left side view of the vertical cross section of the power unit 1.
- the "front, rear, left, right” used to explain the power unit corresponds to the "front, rear, left, right" of the vehicle equipped with the power unit.
- the power unit 1 is configured of a front internal combustion engine 16 and a transmission 17 extending rearward from the left side of the internal combustion engine 16.
- the transmission 17 is constituted by a V-belt type continuously variable transmission 18 and a gear reducer 19.
- the internal combustion engine 16 is a rocker arm type overhead valve four stroke cycle single cylinder water cooled internal combustion engine.
- a throttle body 21 is attached to an inlet pipe 20 attached to the upper intake port of the cylinder head 25 and an air cleaner 11 (FIG. 1) is connected to the rear of the inlet body.
- a fuel injection valve 22 is attached to the inlet pipe 20.
- a gear case breather hose 39 extends from the top of the gear case 38. This is connected to the air intake chamber of the air cleaner 11.
- a vehicle speed sensor 49 is provided on the top of the gear case 38. This is a device for detecting the tip speed of the rear axle large diameter gear 48 (FIG. 3) provided on the rear axle 9 to calculate the vehicle speed.
- FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
- the shell of the internal combustion engine 16 comprises a crankcase 23, a cylinder block 24, a cylinder head 25 and a cylinder head cover 26, which are sequentially connected forward at the front thereof.
- the crankcase 23 is a left and right half split type, and consists of a left crankcase 23L and a right crankcase 23R.
- the crankshaft 27 is rotatably supported by ball bearings 28A and 28B supported by the crankcase 23.
- the piston 29 is slidably fitted in a cylinder hole 30 formed in the cylinder block 24.
- the piston 29 is connected to a crank pin 32 of a crankshaft 27 via a connecting rod 31.
- a combustion chamber 33 is formed on the bottom surface of the cylinder head 25 to face the upper surface of the piston 29.
- the spark plug 34 is attached to the cylinder head 25 at an inclination to the left with respect to the central axis of the cylinder hole 30.
- the transmission 17 comprises a V-belt type continuously variable transmission 18 and a gear reducer 19.
- the V-belt type continuously variable transmission 18 is covered by a transmission case 37.
- the transmission case 37 includes a transmission case right side member 37R and a transmission case left side member 37L.
- the transmission case right side member 37R is integrally formed with the left crankcase 23L.
- the transmission case left side member 37L is coupled to the transmission case right side member 37R by a bolt.
- the gear reducer 19 is covered by the rear of the transmission case right side member 37R and the gear case 38.
- the gear case 38 is coupled to the transmission case right side member 37R by a bolt.
- the drive shaft of the V-belt type continuously variable transmission 18 is the crankshaft 27 itself, and the drive pulley 40 of the V-belt type continuously variable transmission 18 is provided at the left extension of the crankshaft 27.
- the driven shaft 41 is rotatably supported by the transmission case left side member 37L, the transmission case right side member 37R, and the gear case 38 via bearings 42A, 42B, 42C.
- a driven pulley 44 is provided on the driven shaft 41 via a centrifugal clutch 43.
- An endless V-belt 45 is bridged between the drive pulley 40 and the driven pulley 44.
- the drive pulley 40 includes a fixed half 40A, a movable half 40B, a weight roller 40C, and a lamp plate 40D.
- the driven pulley 44 includes a fixed half 44A, a movable half 44B, a rotating sleeve 44C, and a coil spring 44D.
- the centrifugal clutch 43 includes a clutch outer 43A and a clutch inner 43B. The clutch outer 43A is connected to the driven shaft 41, and the clutch inner 43B is connected to the rotating sleeve 44C.
- the number of rotations of the driven pulley 44 is increased.
- the rotation is transmitted to the clutch inner 43B of the centrifugal clutch 43 via the rotating sleeve 44C, the centrifugal clutch 43 is connected, and the rotation of the driven pulley 44 is transmitted to the driven shaft 41 Be done.
- the input shaft of the gear reducer 19 is the driven shaft 41.
- a driven shaft pinion 41 a is formed on the driven shaft 41.
- the rear axle 9 integrally coupled with the rear wheel 10 is rotatably supported by the transmission case right side member 37R and the gear case 38.
- An intermediate shaft 46 is rotatably supported by the transmission case right side member 37R and the gear case 38 at an intermediate position between the driven shaft 41 and the rear axle 9.
- An intermediate shaft large diameter gear 47 meshing with the driven shaft pinion 41a is integrally fitted to the intermediate shaft 46, and an intermediate shaft pinion 46a is formed.
- the rear axle 9 is integrally fitted with a rear axle large diameter gear 48 which meshes with the intermediate shaft pinion 46a.
- the torque of the driven shaft 41 is transmitted to the rear axle 9 via the driven shaft pinion 41a, the intermediate shaft large diameter gear 47, the intermediate shaft 46, the intermediate shaft pinion 46a, and the rear axle large diameter gear 48.
- the rear axle 9 is greatly decelerated with respect to the driven shaft 41, and the rear wheel 10 of the rear axle 9 is decelerated.
- a centrifugal cooling fan 51 is integrally formed on the left surface (rear surface) of the fixed half 40A of the drive pulley 40, and the cooling fan side opening 52 of the cooling air passage case 50 and the transmission case left member 37L described later. Cold air is forcibly sucked through the V-belt type continuously variable transmission 18 to be cooled. The cooled air is exhausted from the exhaust hole 53 (FIG. 2) at the rear of the transmission case 37.
- a cooling air passage case 50 is provided at the front of the transmission case left side member 37L.
- the cooling air passage case 50 is composed of an inner member 50A and an outer member 50B.
- FIG. 4 is a horizontal sectional view of the transmission case left side member 37L
- FIG. 5 is a left view of the transmission case left side member 37L (view taken in the direction of arrow V in FIG. 4).
- a drive pulley side flat portion 56 for mounting the cooling air passage case 50 is provided.
- a cooling fan side opening 52 serving as a suction passage for cooling air is provided.
- bolt insertion holes 57 for coupling with the transmission case right side member 37R are provided.
- bolts 58 are inserted through the central and rear bolt insertion holes 57 and are connected to the transmission case right side member 37R.
- three cooling air passage case fastening screw holes 59 are provided at the front of the transmission case left side member 37L.
- FIG. 6 is an enlarged horizontal cross-sectional view of the inner member 50A of the cooling air passage case 50
- FIG. 7 is a left view of the inner member 50A (viewed from arrow VII in FIG. 6).
- 6 is a cross-sectional view taken along the line VI-VI of FIG.
- a cooling air passage opening 62 is provided at a position opposed to the cooling fan side opening 52 of the transmission case left side member 37L.
- a circular O as a seal member fitted with the peripheral portion of the cooling fan side opening 52 of the transmission case left member 37L
- the ring groove 63 is formed.
- the left side (outer side surface) of the inner member 50A has a part of the outer periphery and a cooling air passage side wall fitting O- fitted inside the cooling air passage side wall 67 of the cooling air passage case outside member 50B described later.
- a ring groove 64 is formed. Further, three cooling air passage case fastening bolt insertion holes 65 are provided.
- FIG. 8 is an enlarged horizontal sectional view of the outer member 50B of the cooling air passage case 50
- FIG. 9 is a left view of the outer member 50B (an external view, a view on arrow IX in FIG. 8)
- FIG. 10 is a right surface of the outer member 50B. It is a figure (internal view, X arrow directional view of FIG. 8).
- FIG. 8 is a sectional view taken along line VIII-VIII of FIG.
- a cooling air passage side wall 67 is provided inside the cooling air passage case outer side member 50B. The top of the cooling air passage side wall 67 is fitted to the cooling air passage side wall fitting O-ring groove 64 of the inner member 50A, and air leakage is prevented by the O-ring 68 (FIG. 11).
- a cooling air intake 71 is formed at the top of the outer member 50B, and a cooling air intake guide fin 72 is provided. Between the guide fins 72 is a cooling air passage hole 71a.
- the outer member 50B is provided with three cooling air passage case fastening bolt insertion holes 73.
- a cooling air passage side wall 67 forming a cooling air passage is provided integrally with the outer member 50B from the cooling air intake 71 to the central portion on a part of the outer member 50B and the inside thereof. .
- the cooling air flowing from the cooling air intake passes between the front portion 67a of the cooling air passage case 50 of the cooling air passage side wall 67 and the front portion 67b of the cooling air intake 71, and the cooling air passage opening 62 ( Figure 7).
- the edges of the cooling air passage side walls 67, 67a, 67b fit into the cooling air passage side wall fitting O-ring groove 64 shown in FIG.
- another cooling air passage side wall 69 is provided on the rear side of the cooling air intake 71.
- the side wall 69 cooperates with the side wall 67b on the front side of the cooling air intake 71 to guide the cooling air flowing in from the cooling air intake 71, but as shown in FIG. There is no mating mating O-ring groove. Therefore, a slight gap is generated between the edge of the side wall 69 and the inner surface of the cooling air passage case inner member 50A. The rainwater entering from the cooling air intake 71 is discharged downward through this gap.
- FIG. 11 is a horizontal sectional view of a state where the cooling air passage case inner member 50A and the outer member 50B are integrally mounted on the transmission case left side member 37L.
- the cooling air passage case 50 covers the cooling fan side opening 52 of the transmission case 37, is attached to the drive pulley side flat portion 56 of the transmission case 37, and the cooling air passage 70 is provided in the cooling air passage case 50. It is formed. Since the cooling air passage case 50 is attached to the drive pulley side flat portion 56, it absorbs the intake vibration noise generated when the intake air passes through the cooling fan side opening 52 of the transmission case 37, thereby preventing noise. It can be improved.
- a circular O-ring 66 is attached to the fitting portion between the transmission case left side member 37L and the cooling air passage case inner member 50A, and the fitting portion between the cooling air passage case inner member 50A and the outer member 50B.
- An O-ring 68 is attached to each to prevent air leakage. Furthermore, the sealing by these O-rings 66, 68 prevents noise leakage.
- FIG. 12 is a perspective view of the cooling air passage 70 in the cooling air passage case 50.
- the cooling air enters from a cooling air intake 71 provided at a position corresponding to the upper side of the drive pulley 40, and travels upward along the dashed arrow, and is folded back into a U-shape 74 and descended, and further L It bends into a letter 75 and reaches the center of the cooling air passage case 50 and passes through the cooling air passage opening 62 (FIG. 7) of the cooling air passage case inner member 50A to open the cooling fan side opening of the transmission case left member 37L. It is drawn into the transmission case 37 from 52 (FIG. 5).
- Mud water, dust and the like can be separated from the cooling air by the folding of the U-shape 74. As a result, if a filter is provided, its life can be extended. Furthermore, by bending from the U-shape 74 to the L-shape 75, the separation of dust and muddy water is improved, and the purification load on the filter can be reduced.
- FIG. 13 is a left side view of the power unit 1 with the transmission case left member 37L and the cooling air passage case 50 assembled to the transmission 17.
- the cooling air passage case 50 is attached to the transmission case 37 by three fastening members 76 provided in a dispersed manner in the front and back of the periphery of the cooling fan side opening 52. Since it is attached by the fastening member 76 disperse
- At least a part of the cooling air intake is provided laterally within a range 77 of the diameter of the drive pulley 40 of the V-belt continuously variable transmission 18.
- FIG. 14 is a left side view showing the power unit 1 and its periphery.
- the cooling air inlet 71 is formed along an edge 78 (FIG. 1) of the vehicle body cover. Therefore, the body cover 13 can easily prevent the entry of foreign matter into the cooling air inlet 71.
- the vehicle body cover 13 is provided with a footrest 79 (FIG. 1) of the same passenger, and the cooling air passage case 50 is formed in the inner space of the side overhanging portion 80 of the vehicle body cover 13 below the footrest 79. ing. Therefore, as shown in FIG. 14, the flow 81 of the cooling air directed to the cooling air intake 71 can be smoothly flowed by utilizing the above-mentioned inner space, and the cooling efficiency can be improved.
- the cooling air intake 71 is provided at the upper side of the drive pulley 40, the cooling air intake 71 can be placed at a distance to the winding mud water and dust of the rear wheel 10, and the penetration of the mud water and dust can be reduced. Further, the cooling air passage forming member can be miniaturized. Furthermore, it is advantageous because the muddy water does not flow along the upper surface of the transmission case 37 accommodating the V-belt type continuously variable transmission 18.
- the air cleaner 11 In the air cleaner 11 at the upper part of the transmission case 37, the air cleaner 11 is positioned so that the intake port 11a of the air cleaner 11 is positioned at the upper part of the cooling air passage case 50 bulging upward by the U-shaped 74 folded portion. Since the cooling air passage case 50 is provided, the flow 82 of intake air toward the air inlet 11a of the air cleaner 11 can be smoothed by the cooling air passage case 50, and the performance of the internal combustion engine 16 can be improved.
- the cooling air passage 70 to the V-belt is formed to communicate with the cooling fan side opening 52 of the transmission case 37 from the cooling air intake 71 provided on the upper side of the drive pulley 40, It is possible to set a distance to the winding mud water and dust of the wheel 10, and to reduce the intrusion of the mud water and dust. Further, the cooling air passage forming member can be miniaturized. Furthermore, it is advantageous to the flow of the mud water along the upper surface of the transmission case 37 accommodating the V-belt type continuously variable transmission 18.
- the cooling air passage 70 takes in the cooling air from the cooling air intake port 71 provided at the upper side of the transmission case 37, guides it upward, and folds it downward into a U-shape 74 to transmit the above-mentioned transmission case 37
- the U-shaped portion 74 can separate muddy water, dust, and the like from the cooling air by the U-shaped 74-folded portion. As a result, if a filter is provided, its life can be extended.
- the cooling air inlet 71 is formed along the edge 78 of the vehicle body cover, the vehicle body cover 13 can easily prevent foreign matter from entering the cooling air inlet 71.
- the cooling air passage 70 is formed in the inner space of the side overhanging portion 80 below the foot placing portion 79 of the vehicle body cover 13, the cooling air flow toward the cooling air intake 71 using the above-mentioned inner space Flow can flow smoothly, and the cooling efficiency can be improved.
- the air cleaner 11 is provided in the upper part of the cooling air passage case 50 so that the intake port 11a of the air cleaner 11 is positioned. 50 can smooth the flow 82 of the intake air toward the intake port of the air cleaner 11 and improve the performance of the internal combustion engine 16.
- the cooling air passage case 50 covers the cooling fan side opening 52 of the transmission case 37 and is mounted in the cooling air passage case 50 attached to the side flat portion 56 of the drive pulley 40 of the transmission case 37. Since it is formed, the intake vibration noise generated when the intake air passes through the cooling fan side opening 52 of the transmission case 37 can be absorbed, and the noise prevention effect can be improved.
- the cooling air passage case 50 is mounted by means of the fastening members 76 distributed around the periphery of the cooling fan side opening 52, so that stable mounting can be performed.
- the cooling air intake port 71 is at least partially provided at the side of the range 77 of the diameter of the drive pulley 40 of the V-belt continuously variable transmission 18, so that the V-belt continuously variable transmission 18 Since it is possible to increase the distance with respect to the winding dust of the rear wheel 10 while preventing the front part from increasing in size, it is possible to reduce the intrusion of dust.
- the U-shaped 74 and the L-shaped 75 are bent and guided to the cooling fan side opening 52, so the separation of dust and muddy water is improved, and a filter is provided. Can reduce the purification burden on the filter.
- the cooling air passage case 50 is attached to the transmission case 37 through the O-ring 66, air leakage from the gap can be prevented, and the noise prevention effect can be further improved.
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Abstract
Description
小型車両の後輪の側方に設けられるVベルト式無段変速機の冷却風取入れ構造において、
外部からの冷却風取入れ口を、変速機ケースの冷却ファン側方開口に対して、変速機ケースの側方で且つ駆動プーリ部の側方上部に設け、冷却風取入れ口から冷却ファン側方開口に至る冷却風通路を、変速機ケースの冷却ファン側方開口の周囲部に形成したことを特徴とするVベルト式無段変速機の冷却風取入れ構造に関するものである。
上記冷却風通路は、冷却風を、変速機ケース側方の上部に設けられた冷却風取入れ口から取入れ、上方に導きU字状に下方へ折り返して上記変速機ケースの冷却ファン側方開口に導くように形成される。
上記冷却風取入れ口は車体カバーの縁に沿って形成される。
上記車体カバーには同乗者の足置き部が設けられ、上記冷却風通路は足置き部の下方の車体カバーの内側空間に形成される。
変速機ケースの上部に設けられるエアクリーナにおいて、上記U字状折り返し部のある冷却風通路が形成された冷却風通路ケースの上部に、エアクリーナの吸気口が位置するように、上記エアクリーナが設けられる。
上記冷却風通路は、変速機ケースの冷却ファン側方開口を覆い、且つ変速機ケースの駆動プーリ側方平面部に取付けられる冷却風通路ケースの中に形成される。
上記冷却風通路ケースは、変速機ケースに対して、冷却ファン側方開口の周囲の前後に分散して設けられた締結部材によって取付けられる。
上記冷却風取入れ口は、少なくともその一部がVベルト無段変速機の駆動プーリの直径の範囲内の側方に設けられる。
上記冷却風通路ケース内において、冷却風は、U字状に屈曲した後下方へ降り、更に後方へL字状に屈曲して冷却ファン側方開口に導かれる。
上記冷却風通路ケースは防振部材を介して変速機ケースに取付けられる。
後輪の巻上げ泥水や埃に対して距離を置くことができ、泥水や埃の侵入を低減することができる。また冷却風通路形成部材の小型化を図ることができる。さらに、Vベルト式無段変速機を収容する変速機ケースの上面に沿った泥水の流れに対して有利となる。
(1)Vベルトへの冷却風通路70を、駆動プーリ40の側方上部に設けた冷却風取入れ口71から、変速機ケース37の冷却ファン側方開口52へ連通するよう形成したので、後輪10の巻上げ泥水や埃に対して距離を置くことができ、泥水や埃の侵入を低減することができる。また冷却風通路形成部材の小型化を図ることができる。さらに、Vベルト式無段変速機18を収容する変速機ケース37の上面に沿った泥水の流れに対して有利となる。
(2)冷却風通路70は、冷却風を、変速機ケース37の側方上部に設けられた冷却風取入れ口71から取入れ、上方に導きU字状74に下方へ折り返して上記変速機ケース37の冷却ファン側方開口52に導くように形成されているので、U字状74折り返し部によって、冷却風から、泥水、埃等を分離することができる。その結果、フィルタが設けてある場合は、その寿命を延ばすことができる。
(3)冷却風取入れ口71は車体カバーの縁78に沿って形成されているので、車体カバー13によって、冷却風取入れ口71への異物の侵入を容易に防止することができる。
(4)冷却風通路70は車体カバー13の足置き部79の下方の側方張り出し部80の内側空間に形成されているので、上記内側空間を利用して冷却風取入れ口71へ向かう冷却風の流れ81をスムーズに流すことができ、冷却効率を向上することができる。
(5)変速機ケース37の上部に設けられるエアクリーナ11において、冷却風通路ケース50の上部に、エアクリーナ11の吸気口11aが位置するように、エアクリーナ11が設けられているので、冷却風通路ケース50によって、エアクリーナ11の吸気口へ向かう吸気の流れ82を滑らかにすることができ、内燃機関16の性能を向上させることができる。
(6)冷却風通路ケース50は、変速機ケース37の冷却ファン側方開口52を覆い、且つ変速機ケース37の駆動プーリ40の側方平面部56に取付けられる冷却風通路ケース50の中に形成されるので、吸入空気が変速機ケース37の冷却ファン側方開口52を通過する時に生じる吸気振動音を吸収して、騒音防止効果を向上することができる。
(7)上記冷却風通路ケース50は、冷却ファン側方開口52の周囲前後に分散して設けられた締結部材76によって取付けられるので、安定した取付けができる。
(8)冷却風取入れ口71は、少なくともその一部がVベルト式無段変速機18の駆動プーリ40の直径の範囲77内の側方に設けられるので、Vベルト式無段変速機18の前部の大型化を防止しつつ、後輪10の巻上げ埃に対して距離を稼ぐことができるので、埃の侵入を低減することができる。
(9)冷却風通路ケース50内において、U字状74からL字状75に屈曲して冷却ファン側方開口52に導かれるので、埃や泥水の分離性が向上し、フィルタを設けた場合には、フィルタにおける浄化負担を削減することができる。
(10)冷却風通路ケース50はO-リング66を介して変速機ケース37に取付けられるので、隙間からの空気の漏れが防止され、更に騒音防止効果を向上させることができる。
Claims (10)
- 小型車両の後輪の側方に設けられるVベルト式無段変速機の冷却風取入れ構造において、
外部からの冷却風取入れ口を、変速機ケースの冷却ファン側方開口に対して、変速機ケースの側方で且つ駆動プーリ部の側方上部に設け、冷却風取入れ口から冷却ファン側方開口に至る冷却風通路を、変速機ケースの冷却ファン側方開口の周囲部に形成したことを特徴とするVベルト式無段変速機の冷却風取入れ構造。 - 上記冷却風通路は、冷却風を、変速機ケース側方の上部に設けられた冷却風取入れ口から取入れ、上方に導きU字状に下方へ折り返して上記変速機ケースの冷却ファン側方開口に導くように形成されることを特徴とする請求項1に記載のVベルト式無段変速機の冷却風取入れ構造。
- 上記冷却風取入れ口は車体カバーの縁に沿って形成されることを特徴とする請求項1又は請求項2に記載のVベルト式無段変速機の冷却風取入れ構造。
- 上記車体カバーには同乗者の足置き部が設けられ、上記冷却風通路は足置き部の下方の車体カバーの内側空間に形成されることを特徴とする請求項3に記載のVベルト式無段変速機の冷却風取入れ構造。
- 変速機ケースの上部に設けられるエアクリーナにおいて、上記U字状折り返し部のある冷却風通路が形成された冷却風通路ケースの上部に、エアクリーナの吸気口が位置するように、上記エアクリーナが設けられることを特徴とする請求項2に記載のVベルト式無段変速機の冷却風取入れ構造。
- 上記冷却風通路は、変速機ケースの冷却ファン側方開口を覆い、且つ変速機ケースの駆動プーリ側面部に取付けられる冷却風通路ケースの中に形成されることを特徴とする請求項5に記載のVベルト式無段変速機の冷却風取入れ構造。
- 上記冷却風通路ケースは、変速機ケースに対して、冷却ファン側方開口の周囲の前後に分散して設けられた締結部材によって取付けられることを特徴とする請求項6に記載のVベルト式無段変速機の冷却風取入れ構造。
- 上記冷却風取入れ口は、少なくともその一部がVベルト無段変速機の駆動プーリの直径の範囲内の側方に設けられることを特徴とする請求項2に記載のVベルト式無段変速機の冷却風取入れ構造。
- 上記冷却風通路ケース内において、冷却風は、U字状に屈曲した後下方へ降り、更に後方へL字状に屈曲して冷却ファン側方開口に導かれることを特徴とする請求項8に記載のVベルト式無段変速機の冷却風取入れ構造。
- 上記冷却風通路ケースは防振部材(O-リング)を介して変速機ケースに取付けられることを特徴とする請求項5乃至請求項9に記載のVベルト式無段変速機の冷却風取入れ構造。
Priority Applications (10)
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AU2009352070A AU2009352070B2 (en) | 2009-09-03 | 2009-09-03 | Cooling air intake structure for V-belt type stepless transmission |
IN1852DEN2012 IN2012DN01852A (ja) | 2009-09-03 | 2009-09-03 | |
CN200980161229.0A CN102483146B (zh) | 2009-09-03 | 2009-09-03 | V带式无极变速器的冷却风导入构造 |
EP09848976.8A EP2474435B1 (en) | 2009-09-03 | 2009-09-03 | Cooling air intake structure for v-belt type stepless transmission |
PCT/JP2009/065404 WO2011027445A1 (ja) | 2009-09-03 | 2009-09-03 | Vベルト式無段変速機の冷却風取入れ構造 |
JP2011529735A JP5443500B2 (ja) | 2009-09-03 | 2009-09-03 | Vベルト式無段変速機の冷却風取入れ構造 |
KR1020127007321A KR101387673B1 (ko) | 2009-09-03 | 2009-09-03 | V 벨트식 무단 변속기의 냉각풍 흡입 구조 |
ES09848976.8T ES2556329T3 (es) | 2009-09-03 | 2009-09-03 | Estructura de admisión de aire de refrigeración para transmisión sin etapas de tipo correa trapezoidal |
US13/393,016 US8840496B2 (en) | 2009-09-03 | 2009-09-03 | Cooling air intake structure for V-belt drive continuously variable transmission |
TW099129065A TWI409397B (zh) | 2009-09-03 | 2010-08-30 | V型帶式無段變速機之冷卻空氣進氣構造 |
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2009
- 2009-09-03 CN CN200980161229.0A patent/CN102483146B/zh active Active
- 2009-09-03 JP JP2011529735A patent/JP5443500B2/ja not_active Expired - Fee Related
- 2009-09-03 WO PCT/JP2009/065404 patent/WO2011027445A1/ja active Application Filing
- 2009-09-03 EP EP09848976.8A patent/EP2474435B1/en active Active
- 2009-09-03 KR KR1020127007321A patent/KR101387673B1/ko not_active IP Right Cessation
- 2009-09-03 US US13/393,016 patent/US8840496B2/en not_active Expired - Fee Related
- 2009-09-03 AU AU2009352070A patent/AU2009352070B2/en not_active Ceased
- 2009-09-03 ES ES09848976.8T patent/ES2556329T3/es active Active
- 2009-09-03 IN IN1852DEN2012 patent/IN2012DN01852A/en unknown
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2010
- 2010-08-30 TW TW099129065A patent/TWI409397B/zh not_active IP Right Cessation
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013024351A (ja) * | 2011-07-23 | 2013-02-04 | Honda Motor Co Ltd | 小型車両用パワーユニット |
WO2017033615A1 (ja) * | 2015-08-21 | 2017-03-02 | 本田技研工業株式会社 | 鞍乗型車両のパワーユニット |
JPWO2017033615A1 (ja) * | 2015-08-21 | 2018-04-26 | 本田技研工業株式会社 | 鞍乗型車両のパワーユニット |
CN110073128A (zh) * | 2016-12-22 | 2019-07-30 | 北极星工业有限公司 | 用于变速器的壳体 |
JP2019158080A (ja) * | 2018-03-16 | 2019-09-19 | 本田技研工業株式会社 | 鞍乗型車両のベルト式無段変速装置 |
Also Published As
Publication number | Publication date |
---|---|
KR101387673B1 (ko) | 2014-04-22 |
TW201113455A (en) | 2011-04-16 |
JP5443500B2 (ja) | 2014-03-19 |
JPWO2011027445A1 (ja) | 2013-01-31 |
IN2012DN01852A (ja) | 2015-08-21 |
US20120289370A1 (en) | 2012-11-15 |
CN102483146B (zh) | 2015-07-15 |
EP2474435A4 (en) | 2013-03-27 |
AU2009352070B2 (en) | 2013-12-05 |
KR20120062808A (ko) | 2012-06-14 |
EP2474435A1 (en) | 2012-07-11 |
AU2009352070A1 (en) | 2012-03-08 |
CN102483146A (zh) | 2012-05-30 |
TWI409397B (zh) | 2013-09-21 |
EP2474435B1 (en) | 2015-09-16 |
ES2556329T3 (es) | 2016-01-15 |
US8840496B2 (en) | 2014-09-23 |
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