WO2015002168A1 - 車両 - Google Patents
車両 Download PDFInfo
- Publication number
- WO2015002168A1 WO2015002168A1 PCT/JP2014/067481 JP2014067481W WO2015002168A1 WO 2015002168 A1 WO2015002168 A1 WO 2015002168A1 JP 2014067481 W JP2014067481 W JP 2014067481W WO 2015002168 A1 WO2015002168 A1 WO 2015002168A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- body frame
- vehicle
- front wheel
- wheel
- engine
- Prior art date
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Classifications
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- 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
- B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
- B62K5/10—Cycles with handlebars, equipped with three or more main road wheels with means for inwardly inclining the vehicle body on bends
-
- 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
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
- B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
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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
- B62J23/00—Other protectors specially adapted for cycles
-
- 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
- B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels
- B62K11/02—Frames
- B62K11/04—Frames characterised by the engine being between front and rear wheels
-
- 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
- B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
- B62K5/02—Tricycles
- B62K5/027—Motorcycles with three wheels
-
- 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
- B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
- B62K5/02—Tricycles
- B62K5/05—Tricycles characterised by a single rear wheel
-
- 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
- B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
- B62K5/08—Cycles with handlebars, equipped with three or more main road wheels with steering devices acting on two or more wheels
Definitions
- the present invention relates to a vehicle including an inclinable body frame and two front wheels arranged side by side in the left-right direction of the body frame.
- a vehicle having a body frame that tilts in the left-right direction of the vehicle when turning left and right and two front wheels that are arranged side by side in the left-right direction of the body frame is known (see, for example, Patent Document 1).
- This type of vehicle is a vehicle that can turn with the body frame tilted with respect to the vertical direction. More specifically, the body frame tilts to the right of the vehicle when turning right, and leans to the left of the vehicle when turning left.
- the distance between two front wheels arranged side by side in the left-right direction of the body frame is very narrow compared to that of a general four-wheel vehicle. . Therefore, this type of vehicle is compact in the left-right direction of the body frame.
- This type of vehicle includes an engine unit including an engine (internal combustion engine) that generates driving force of the vehicle.
- the vehicle described in Patent Document 1 includes an engine and a heat dissipation device that dissipates heat generated by combustion of the engine as an engine unit.
- the ventilation opening is provided on the front surface of the front cover that covers at least a part of the steering device. Further, the heat dissipation device is disposed inside the front cover.
- the vehicle described in Patent Document 1 takes in the wind received by the vehicle during traveling (that is, the airflow generated around the vehicle) from the ventilation opening and makes it contact the heat dissipation device. As a result, the engine unit is cooled.
- the front cover tends to be enlarged to accommodate a link mechanism that links the two front wheels. is there.
- the heat dissipation device By disposing the heat dissipation device in such a front cover while avoiding interference with the link mechanism, the front cover is increased in size, and thus the vehicle is increased in size.
- an object of the present invention is to efficiently cool an engine unit while downsizing a vehicle including a leanable vehicle body frame and two front wheels arranged side by side in the vehicle body frame.
- One aspect that the present invention can take in order to achieve the above object is a vehicle, A body frame that leans to the left of the vehicle when turning left and leans to the right of the vehicle when turning right; A left front wheel and a right front wheel arranged side by side in the left-right direction of the body frame; A rear wheel disposed behind the left front wheel and the right front wheel in the front-rear direction of the body frame; A link mechanism that changes the relative positions of the right front wheel and the left front wheel with respect to the vehicle body frame to incline the vehicle body frame leftward or rightward; A front cover covering at least a part of the link mechanism; A steering device for rotating the left front wheel and the right front wheel; An engine unit including an engine, and disposed behind the left front wheel and the right front wheel in the front-rear direction; From the rear ends of the left front wheel and the right front wheel in the front-rear direction, from the engine unit in the front-rear direction, and from the upper ends of the left front wheel and the right front wheel in the vertical direction of the body frame
- the ventilation opening for taking in air for cooling the heat dissipation device which is a part of the engine unit, is formed on the front surface of the front cover that covers at least a part of the steering device. Is provided. Since this arrangement can receive a high-velocity airflow generated from the front of the vehicle as it travels from the front, from the viewpoint of efficiently using the airflow to cool part of the engine unit efficiently, It is suitable. In fact, the inventor has confirmed that a sufficient cooling effect of the engine unit is obtained by the arrangement.
- a link mechanism that links the two front wheels is housed in the front cover. Further, by accommodating the heat dissipation device in the front cover, the front cover is enlarged and the vehicle is enlarged. Further, since it is necessary to dispose the heat dissipation device while avoiding the link mechanism, the degree of freedom in layout of the heat dissipation device and the ventilation opening is limited.
- the inventor examined a configuration capable of efficiently cooling the engine unit while reducing the size of the vehicle. Specifically, the flow of air around the vehicle was analyzed, and it was investigated whether there was any other position where the air velocity was fast and air could be taken in efficiently.
- a body frame that leans to the left of the vehicle when turning left and leans to the right of the vehicle when turning right;
- a left front wheel and a right front wheel arranged side by side in the left-right direction of the body frame;
- a rear wheel disposed behind the left front wheel and the right front wheel in the front-rear direction of the body frame;
- a link mechanism that changes the relative positions of the right front wheel and the left front wheel with respect to the vehicle body frame to incline the vehicle body frame leftward or rightward;
- a front cover covering at least a part of the link mechanism;
- An engine unit including an engine, and disposed behind the left front wheel and the right front wheel in the front-rear direction; From the rear ends of the left front wheel and the right front wheel in the front-rear direction, from the engine unit in the front-rear direction, and from the upper ends of the left front wheel and the right front wheel in the vertical direction of the body frame
- An inner fender having
- the inventor has found that when the left front wheel and the right front wheel are not rotated by the steering device in the upright state of the body frame, the rear end of the lower cover portion in the front-rear direction, the left end of the left front wheel There is a region where the velocity of the airflow is relatively high in the region to the left and to the right of the right end of the right front wheel (that is, a position relatively distant from the center of the vehicle in the left-right direction of the body frame). I found out. However, if an attempt is made to provide a structure for taking in a fast airflow existing in such a region, the vehicle is inevitably enlarged in the left-right direction.
- the inventor determines that the vehicle body frame is upright and the left front wheel and the right front wheel are not rotated by the steering device.
- the velocity of the airflow is relatively slow from the rear end to the front in the front-rear direction, from the left end of the left front wheel to the right in the left-right direction, and from the right end of the right front wheel to the left in the left-right direction. Found that the region exists.
- the region where the velocity of the airflow is relatively slow is a region where the atmospheric pressure is relatively high. Therefore, the inventor has changed the way of thinking and thought that it is possible to efficiently take in air if a pressure difference is generated by providing a fan in such a region.
- the inventor configured the fan to generate an air flow that cools a part of the engine unit at least during traveling. Further, the inventor has at least a part of the ventilation opening portion through which the airflow toward the fan passes at least during traveling, with the body frame standing upright and the left front wheel and the right front wheel being rotated by the steering device.
- the front and rear direction of the lower cover the front end of the front and rear direction from the rear end of the rear wheel, the right side of the left front wheel and the right side of the left and right direction, and the right front wheel It was arrange
- air can be efficiently guided to a part of the engine unit from the ventilation opening by utilizing the pressure difference generated by driving the fan. Furthermore, in the upright state of the body frame and the left front wheel and the right front wheel being not rotated by the steering device, the rear side of the lower cover portion and the rear wheel from the rear end of the rear wheel The region in the front-rear direction, the right side in the left-right direction from the left end of the left front wheel, and the left side in the left-right direction from the right end of the right front wheel covers a relatively wide range. Therefore, a high degree of freedom in layout of the engine unit, the fan, and the ventilation opening can be ensured.
- the vehicle since it is not necessary to provide a structure for taking in the airflow in the lateral direction of the vehicle, the vehicle can be reduced in size. Therefore, the engine unit can be efficiently cooled while downsizing a vehicle including a body frame that can be tilted and two front wheels arranged side by side in the left-right direction of the body frame.
- the engine unit includes a radiator,
- the radiator is arranged so that the airflow that has passed through the ventilation opening comes into contact with the radiator. It is good also as a structure.
- a water-cooled engine unit can be efficiently cooled while downsizing a vehicle including a leanable vehicle body frame and two front wheels arranged side by side in the vehicle body frame.
- the radiator may be arranged at a position where an air flow toward the fan passes.
- the configuration as described above includes heat dissipated from the radiator due to the pressure difference formed by the fan disposed on the downstream side of the radiator. Air is efficiently directed toward the fan. Therefore, the engine unit can be cooled more efficiently while downsizing a vehicle including a leanable vehicle body frame and two front wheels arranged side by side in the left-right direction of the vehicle body frame.
- the engine may be arranged so that the airflow that has passed through the ventilation opening is in contact with the engine.
- the engine as a heat source can be efficiently cooled. Therefore, the engine unit can be cooled more efficiently while downsizing a vehicle including a leanable vehicle body frame and two front wheels arranged side by side in the left-right direction of the vehicle body frame.
- the fan may be arranged at a position where an air flow toward the engine passes.
- the airflow generated by driving the fan can be efficiently sent to the engine as the heat source. Therefore, the engine unit can be cooled more efficiently while downsizing a vehicle including a leanable vehicle body frame and two front wheels arranged side by side in the left-right direction of the vehicle body frame.
- the vent opening may be configured to open so as to intersect the left-right direction.
- the air that cools a part of the engine unit can be efficiently taken in by using the pressure difference generated by driving the fan.
- the necessity of providing a structure that positively receives the airflow flowing from the front to the rear of the vehicle on the left or right side of the vehicle is reduced. Therefore, the engine unit can be efficiently cooled while further reducing the size of the vehicle including the leanable body frame and the two front wheels arranged side by side in the left-right direction of the body frame.
- arrow F indicates the front direction of the vehicle.
- Arrow B indicates the backward direction of the vehicle.
- An arrow U indicates the upward direction of the vehicle.
- An arrow D indicates the downward direction of the vehicle.
- An arrow R indicates the right direction of the vehicle.
- An arrow L indicates the left direction of the vehicle.
- an arrow FF indicates the front direction of the body frame.
- An arrow FB indicates the rear direction of the vehicle body frame.
- An arrow FU indicates the upward direction of the vehicle body frame.
- An arrow FD indicates the downward direction of the vehicle body frame.
- An arrow FR indicates the right direction of the body frame.
- An arrow FL indicates the left direction of the body frame.
- the longitudinal direction of the vehicle body frame “the lateral direction of the vehicle body frame”, and “the vertical direction of the vehicle body frame” are the longitudinal direction with respect to the vehicle body frame as viewed from the occupant driving the vehicle, It means the horizontal direction and the vertical direction.
- the “side of the body frame” means the right direction or the left direction of the body frame.
- extending in the front-rear direction of the body frame includes extending obliquely with respect to the front-rear direction of the body frame, and the front-rear direction of the body frame compared to the left-right direction and the up-down direction of the body frame. It means to extend with an inclination close to.
- extending in the left-right direction of the body frame includes extending obliquely with respect to the left-right direction of the body frame, and compared with the front-rear direction and the up-down direction of the body frame. It means to extend with an inclination close to.
- extending in the vertical direction of the vehicle body frame includes extending in a vertical direction of the vehicle body frame, and the vertical direction of the vehicle body frame as compared with the front-rear direction and the horizontal direction of the vehicle body frame. It means to extend with an inclination close to.
- the “upright state of the body frame” means a state in which the vehicle body is not steered and the vertical direction of the body frame coincides with the vertical direction.
- the direction based on the vehicle coincides with the direction based on the vehicle frame.
- the vehicle left-right direction does not match the vehicle body frame left-right direction.
- the vertical direction of the vehicle does not match the vertical direction of the body frame.
- the longitudinal direction of the vehicle coincides with the longitudinal direction of the body frame.
- the vehicle 1 is a vehicle that is driven by power generated from a power source and includes a tiltable body frame and two front wheels arranged side by side in the left-right direction of the body frame.
- FIG. 1 is a left side view of the entire vehicle 1 as viewed from the left.
- the vehicle 1 includes a vehicle body 2, a pair of left and right front wheels 3, a rear wheel 4, a link mechanism 5, and a steering device 7.
- the vehicle body 2 includes a body frame 21, a body cover 22, a seat 24, and an engine unit 25.
- the body frame 21 is in an upright state.
- the subsequent description with reference to FIG. 1 is based on the upright state of the body frame 21.
- the vehicle body frame 21 includes a head pipe 211, a down frame 212, and a rear frame 213. In FIG. 1, a portion of the body frame 21 hidden by the body cover 22 is indicated by a broken line.
- the vehicle body frame 21 supports the seat 24 and the engine unit 25.
- the engine unit 25 supports the rear wheel 4.
- the engine unit 25 includes a power source such as an engine, an electric motor, and a battery, and a device such as a transmission. The power source generates a force that drives the vehicle 1.
- the head pipe 211 is disposed in the front portion of the vehicle 1. When viewed from the left side of the vehicle body frame 21, the upper portion of the head pipe 211 is disposed behind the lower portion of the head pipe 211.
- the down frame 212 is connected to the head pipe 211.
- the down frame 212 is disposed behind the head pipe 211.
- the down frame 212 extends in the vertical direction of the body frame 21.
- the rear frame 213 is disposed behind the down frame 212.
- the rear frame 213 extends in the front-rear direction of the body frame 21.
- the rear frame 213 supports the seat 24 and the engine unit 25.
- the vehicle body cover 22 includes a front cover 221, a pair of left and right front fenders 223, a rear fender 224, and an inner fender 225.
- the vehicle body cover 22 is a vehicle body part that covers at least a part of vehicle body parts mounted on the vehicle 1 such as a pair of left and right front wheels 3, a vehicle body frame 21, and a link mechanism 5.
- the front cover 221 is disposed in front of the seat 24.
- the front cover 221 covers at least a part of the link mechanism 5 and the steering device 7.
- At least a part of the pair of left and right front fenders 223 is respectively disposed below the front cover 221. At least a part of the pair of left and right front fenders 223 is respectively disposed above the pair of left and right front wheels 3.
- At least a part of the rear fender 224 is disposed above the rear wheel 4.
- the inner fender 225 is disposed at a position covering at least a part of the passenger's leg.
- the inner fender 225 is disposed behind the pair of left and right front wheels 3 and ahead of the seat 24.
- At least a part of the pair of left and right front wheels 3 is disposed below the head pipe 211. At least a part of the pair of left and right front wheels 3 is disposed below the front cover 221.
- At least a part of the rear wheel 4 is disposed below the seat 24. At least a part of the rear wheel 4 is disposed below the rear fender 224.
- FIG. 2 is a front view of the front portion of the vehicle 1 as viewed from the front of the vehicle body frame 21.
- the body frame 21 is in an upright state.
- the subsequent description referring to FIG. 2 is based on the upright state of the body frame 21.
- FIG. 2 shows a state in which the front cover 221 indicated by a broken line and the pair of left and right front fenders 223 are seen through.
- the left and right front wheels 3 include a left front wheel 31 and a right front wheel 32.
- the left front wheel 31 is disposed to the left of the head pipe 211 that is a part of the body frame 21.
- the right front wheel 32 is disposed on the right side of the head pipe 211.
- the left front wheel 31 and the right front wheel 32 are arranged side by side in the left-right direction of the body frame 21.
- Steering device 7 includes a left buffer mechanism 33, a right buffer mechanism 34, a left bracket 317, and a right bracket 327.
- the left shock absorbing mechanism 33 includes a left outer cylinder 33a.
- the left outer cylinder 33a supports the left front wheel 31.
- the left outer cylinder 33a extends in the vertical direction of the body frame 21.
- the left outer cylinder 33a includes a left support shaft 314 at its lower end.
- the left front wheel 31 is supported by the left support shaft 314.
- the left shock absorbing mechanism 33 includes a left inner cylinder 33b.
- the left inner cylinder 33b extends in the vertical direction of the body frame 21.
- the left inner cylinder 33b is disposed above the left outer cylinder 33a with a part thereof being inserted into the left outer cylinder 33a.
- the upper part of the left inner cylinder 33b is fixed to the left bracket 317.
- the left buffer mechanism 33 is a so-called telescopic buffer mechanism.
- the left inner cylinder 33b moves relative to the left outer cylinder 33a in the extending direction of the left outer cylinder 33a, the left shock absorbing mechanism 33 can expand and contract in that direction.
- the left buffer mechanism 33 buffers the displacement in the vertical direction of the body frame 21 of the left front wheel 31 with respect to the left inner cylinder 33b.
- the left outer cylinder 33a and the left inner cylinder 33b constitute a pair of telescopic elements arranged side by side in the front-rear direction of the body frame 21.
- the right shock absorbing mechanism 34 includes a right outer cylinder 34a.
- the right outer cylinder 34a supports the right front wheel 32.
- the right outer cylinder 34 a extends in the vertical direction of the body frame 21.
- the right outer cylinder 34a includes a right support shaft 324 at the lower end thereof.
- the right front wheel 32 is supported by the right support shaft 324.
- the right shock absorbing mechanism 34 includes a right inner cylinder 34b.
- the right inner cylinder 34b extends in the vertical direction of the body frame 21.
- the right inner cylinder 34b is disposed above the right outer cylinder 34a with a part thereof being inserted into the right outer cylinder 34a.
- the upper part of the right inner cylinder 34b is fixed to the right bracket 327.
- the right buffer mechanism 34 is a so-called telescopic buffer mechanism. As the right inner cylinder 34b moves relative to the right outer cylinder 34a in the direction in which the right outer cylinder 34a extends, the right shock absorbing mechanism 34 can expand and contract in that direction. Thereby, the right buffer mechanism 34 buffers the displacement in the vertical direction of the body frame 21 of the right front wheel 32 with respect to the right inner cylinder 34b.
- the right outer cylinder 34 a and the right inner cylinder 34 b constitute a pair of telescopic elements arranged side by side in the front-rear direction of the body frame 21.
- the steering device 7 includes a steering force transmission mechanism 6.
- the steering force transmission mechanism 6 includes a handle bar 23 and a steering shaft 60.
- the handle bar 23 is attached to the upper part of the steering shaft 60.
- a part of the steering shaft 60 is rotatably supported by the head pipe 211.
- An intermediate rotation axis Z of the steering shaft 60 extends in the vertical direction of the body frame 21. As shown in FIG. 1, the upper part of the steering shaft 60 is arranged behind the lower part. Therefore, the intermediate rotation axis Z of the steering shaft 60 is inclined in the front-rear direction of the body frame 21.
- the steering shaft 60 rotates about the intermediate rotation axis Z according to the operation of the handlebar 23 by the occupant.
- the steering force transmission mechanism 6 transmits a steering force for the occupant to operate the handlebar 23 to the left bracket 317 and the right bracket 327. A specific configuration will be described in detail later.
- the vehicle 1 employs a parallel four-bar link (also called parallelogram link) type link mechanism 5.
- the link mechanism 5 is disposed below the handle bar 23.
- the link mechanism 5 is disposed above the left front wheel 31 and the right front wheel 32.
- the link mechanism 5 includes an upper cross member 51, a lower cross member 52, a left side member 53, and a right side member 54.
- the link mechanism 5 does not rotate with respect to the vehicle body frame 21 around the intermediate rotation axis Z, regardless of the rotation about the intermediate rotation axis Z of the steering shaft 60 accompanying the operation of the handle bar 23. .
- the upper cross member 51 includes a plate-like member 512.
- the plate member 512 is disposed in front of the head pipe 211.
- the plate-like member 512 extends in the left-right direction of the body frame 21.
- the intermediate portion of the upper cross member 51 is supported by the head pipe 211 by the support portion C.
- the upper cross member 51 is rotatable with respect to the head pipe 211 about an intermediate upper axis that passes through the support portion C and extends in the front-rear direction of the vehicle body frame 21.
- the left end portion of the upper cross member 51 is supported by the left side member 53 by the support portion D.
- the upper cross member 51 is rotatable with respect to the left side member 53 about an upper left axis that passes through the support portion D and extends in the front-rear direction of the vehicle body frame 21.
- the right end portion of the upper cross member 51 is supported by the right side member 54 by the support portion E.
- the upper cross member 51 is rotatable with respect to the right side member 54 about a right upper axis extending through the support portion E and extending in the front-rear direction of the vehicle body frame 21.
- FIG. 3 is a plan view of the front portion of the vehicle 1 as viewed from above the body frame 21.
- the vehicle body frame 21 is in an upright state.
- the subsequent description referring to FIG. 3 is based on the upright state of the body frame 21.
- FIG. 3 shows a state in which the front cover 221 and the pair of front fenders 223 indicated by broken lines are seen through.
- the lower cross member 52 includes a front plate member 522a and a rear plate member 522b.
- the front plate member 522a is disposed in front of the head pipe 211.
- the rear plate member 522b is disposed behind the head pipe 211.
- the front plate member 522a and the rear plate member 522b extend in the left-right direction of the body frame 21.
- the front plate member 522a and the rear plate member 522b are connected by a left connection block 523a and a right connection block 523b.
- the left connection block 523a is disposed on the left side of the head pipe 211.
- the right connection block 523b is disposed on the right side of the head pipe 211.
- the lower cross member 52 is disposed below the upper cross member 51.
- the length dimension of the lower cross member 52 in the left-right direction of the body frame 21 is the same as or equivalent to the length dimension of the upper cross member 51 in the left-right direction of the body frame 21.
- the lower cross member 52 extends in parallel with the upper cross member 51.
- the intermediate part of the lower cross member 52 is supported by the head pipe 211 by the support part F.
- the lower cross member 52 is rotatable about an intermediate lower axis that passes through the support portion F and extends in the front-rear direction of the vehicle body frame 21.
- the left end portion of the lower cross member 52 is supported by the left side member 53 by the support portion G.
- the lower cross member 52 is rotatable about a lower left axis that passes through the support portion G and extends in the front-rear direction of the vehicle body frame 21.
- the right end portion of the lower cross member 52 is supported by the right side member 54 by the support portion H.
- the lower cross member 52 is rotatable about a lower right axis that passes through the support portion H and extends in the front-rear direction of the vehicle body frame 21.
- the middle upper axis, upper right axis, upper left axis, middle lower axis, lower right axis, and lower left axis extend in parallel to each other.
- the middle upper axis, the upper right axis, the upper left axis, the middle lower axis, the lower right axis, and the lower left axis are arranged above the left front wheel 31 and the right front wheel 32.
- the left side member 53 is disposed on the left side of the head pipe 211.
- the left side member 53 is disposed above the left front wheel 31.
- the left side member 53 extends in the direction in which the head pipe 211 extends.
- the left side member 53 extends in a direction in which the intermediate rotation axis Z of the steering shaft 60 extends.
- the upper part of the left side member 53 is arranged behind the lower part.
- the lower part of the left side member 53 is connected to the left bracket 317.
- the left bracket 317 is rotatable about the left central axis X with respect to the left side member 53.
- the left central axis X extends in the direction in which the left side member 53 extends. As shown in FIG. 2, the left central axis X extends in parallel with the intermediate rotation axis Z of the steering shaft 60 in the vertical direction of the vehicle body frame 21. As shown in FIG. 3, the left central axis X extends in parallel with the intermediate rotation axis Z of the steering shaft 60 in the front-rear direction of the vehicle body frame 21.
- the right side member 54 is disposed on the right side of the head pipe 211.
- the right side member 54 is disposed above the right front wheel 32.
- the right side member 54 extends in the direction in which the head pipe 211 extends.
- the right side member 54 extends in the direction in which the intermediate rotation axis Z of the steering shaft 60 extends.
- the upper part of the right side member 54 is arranged behind the lower part.
- the lower part of the right side member 54 is connected to the right bracket 327.
- the right bracket 327 is rotatable about the right central axis Y with respect to the right side member 54.
- the right center axis Y extends in the direction in which the right side member 54 extends.
- the right central axis Y extends in parallel with the intermediate rotation axis Z of the steering shaft 60 in the vertical direction of the vehicle body frame 21.
- the right center axis Y extends in parallel with the intermediate rotation axis Z of the steering shaft 60 in the front-rear direction of the vehicle body frame 21.
- the upper cross member 51, the lower cross member 52, the left side member 53, and the right side member 54 maintain the posture in which the upper cross member 51 and the lower cross member 52 are parallel to each other, and the left side member 53. And the right side member 54 are supported by the vehicle body frame 21 so as to maintain a mutually parallel posture.
- the steering force transmission mechanism 6 includes an intermediate transmission plate 61, a left transmission plate 62, a right transmission plate 63, an intermediate joint 64, and a left joint in addition to the handle bar 23 and the steering shaft 60 described above. 65, a right joint 66, and a tie rod 67.
- the intermediate transmission plate 61 is connected to the lower part of the steering shaft 60.
- the intermediate transmission plate 61 is not rotatable relative to the steering shaft 60.
- the intermediate transmission plate 61 can rotate around the intermediate rotation axis Z of the steering shaft 60 with respect to the head pipe 211.
- the front part of the intermediate transmission plate 61 is narrower in the left-right direction of the body frame 21 than the rear part.
- the left transmission plate 62 is disposed on the left side of the intermediate transmission plate 61.
- the left transmission plate 62 is connected to the lower part of the left bracket 317.
- the left transmission plate 62 cannot rotate relative to the left bracket 317.
- the left transmission plate 62 is rotatable about the left central axis X with respect to the left side member 53.
- the front part of the left transmission plate 62 is narrower in the left-right direction of the body frame 21 than the rear part.
- the right transmission plate 63 is disposed on the right side of the intermediate transmission plate 61.
- the right transmission plate 63 is connected to the lower part of the right bracket 327.
- the right transmission plate 63 is not rotatable relative to the right bracket 327.
- the right transmission plate 63 is rotatable about the right central axis Y with respect to the right side member 54.
- the front part of the right transmission plate 63 is narrower in the left-right direction of the body frame 21 than the rear part.
- the intermediate joint 64 is connected to the front portion of the intermediate transmission plate 61 via a shaft portion extending in the vertical direction of the vehicle body frame 21.
- the intermediate transmission plate 61 and the intermediate joint 64 are relatively rotatable around the shaft portion.
- the left joint 65 is disposed on the left side of the intermediate joint 64.
- the left joint 65 is connected to the front portion of the left transmission plate 62 via a shaft portion extending in the vertical direction of the body frame.
- the left transmission plate 62 and the left joint 65 are capable of relative rotation about the shaft portion.
- the right joint 66 is disposed on the right side of the intermediate joint 64.
- the right joint 66 is connected to the front portion of the right transmission plate 63 via a shaft portion extending in the vertical direction of the body frame.
- the right transmission plate 63 and the right joint 66 are relatively rotatable around the shaft portion.
- a shaft portion extending in the front-rear direction of the body frame 21 is provided at the front portion of the intermediate joint 64.
- a shaft portion extending in the front-rear direction of the body frame 21 is provided at the front portion of the left joint 65.
- a shaft portion extending in the front-rear direction of the body frame 21 is provided at the front portion of the right joint 66.
- the tie rod 67 extends in the left-right direction of the body frame 21.
- the tie rod 67 is connected to the intermediate joint 64, the left joint 65, and the right joint 66 through these shaft portions.
- the tie rod 67 and the intermediate joint 64 are rotatable relative to each other around a shaft portion provided at the front portion of the intermediate joint 64.
- the tie rod 67 and the left joint 65 are rotatable relative to each other about a shaft provided at the front portion of the left joint 65.
- the tie rod 67 and the right joint 66 are rotatable relative to each other about a shaft provided at the front portion of the right joint 66.
- FIG. 4 is a plan view of the front portion of the vehicle 1 viewed from above the vehicle body frame 21 in a state where the left front wheel 31 and the right front wheel 32 are steered to the left.
- FIG. 4 shows a state in which the front cover 221 and the pair of front fenders 223 indicated by broken lines are seen through.
- the steering shaft 60 rotates with respect to the head pipe 211 about the intermediate rotation axis Z.
- the steering shaft 60 rotates in the direction of the arrow T.
- the intermediate transmission plate 61 rotates in the direction of arrow T about the intermediate rotation axis Z with respect to the head pipe 211.
- the intermediate joint 64 of the tie rod 67 rotates in the direction of arrow S with respect to the intermediate transmission plate 61.
- the tie rod 67 moves to the right rear while maintaining its posture.
- the left joint 65 and the right joint 66 of the tie rod 67 rotate in the arrow S direction with respect to the left transmission plate 62 and the right transmission plate 63, respectively.
- the left transmission plate 62 and the right transmission plate 63 rotate in the direction of the arrow T while maintaining the posture of the tie rod 67.
- the left buffer mechanism 33 connected to the left bracket 317 via the left inner cylinder 33b is centered on the left central axis X with respect to the left side member 53. It rotates in the direction of arrow T.
- the left shock absorbing mechanism 33 rotates in the direction of arrow T
- the left front wheel 31 supported by the left shock absorbing mechanism 33 via the left support shaft 314 is centered on the left central axis X with respect to the left side member 53. , Rotate in the direction of arrow T.
- the right shock absorbing mechanism 34 connected to the right bracket 327 via the right inner cylinder 34b is centered on the right central axis Y with respect to the right side member 54. It rotates in the direction of arrow T.
- the right buffer mechanism 34 rotates in the direction of arrow T
- the right front wheel 32 supported by the right buffer mechanism 34 via the right support shaft 324 is centered on the right central axis Y with respect to the right side member 54. , Rotate in the direction of arrow T.
- the steering force transmission mechanism 6 transmits the steering force to the left front wheel 31 and the right front wheel 32 in accordance with the operation of the handlebar 23 by the occupant.
- the left front wheel 31 and the right front wheel 32 rotate about the left center axis X and the right center axis Y in directions corresponding to the direction of operation of the handlebar 23 by the occupant.
- FIG. 5 is a front view of the front portion of the vehicle 1 viewed from the front of the vehicle body frame 21 in a state where the vehicle body frame 21 is inclined to the left of the vehicle 1.
- FIG. 5 shows a state in which the front cover 221 and the pair of front fenders 223 indicated by broken lines are seen through.
- the link mechanism 5 has a rectangular shape.
- the link mechanism 5 when the vehicle body 21 is inclined, the link mechanism 5 has a parallelogram shape when the vehicle 1 is viewed from the front of the vehicle body frame 21.
- the deformation of the link mechanism 5 and the inclination of the vehicle body frame 21 in the left-right direction are interlocked.
- the operation of the link mechanism 5 means that the upper cross member 51, the lower cross member 52, the left side member 53, and the right side member 54 constituting the link mechanism 5 are centered on the rotation axis passing through the respective support portions C to H. Means that the shape of the link mechanism 5 changes.
- the head pipe 211 tilts to the left with respect to the vertical direction.
- the upper cross member 51 rotates counterclockwise as viewed from the front of the vehicle 1 with respect to the head pipe 211 around the intermediate upper axis passing through the support portion C.
- the lower cross member 52 rotates around the intermediate lower axis passing through the support portion F counterclockwise when viewed from the front of the vehicle 1 with respect to the head pipe 211.
- the upper cross member 51 moves to the left with respect to the lower cross member 52.
- the upper cross member 51 moves to the left, the upper cross member 51 is centered on the upper left axis passing through the support portion D and the upper right axis passing through the support portion E, respectively, with respect to the left side member 53 and the right side member 54.
- the vehicle 1 rotates counterclockwise as viewed from the front.
- the lower cross member 52 is seen from the front of the vehicle 1 with respect to the left side member 53 and the right side member 54 with the lower left axis passing through the support portion G and the lower right axis passing through the support portion H as the centers. Turn counterclockwise.
- the left side member 53 and the right side member 54 are inclined leftward with respect to the vertical direction while maintaining a posture parallel to the head pipe 211.
- the lower cross member 52 moves to the left with respect to the tie rod 67.
- the shaft portions provided at the front portions of the intermediate joint 64, the left joint 65, and the right joint 66 rotate with respect to the tie rod 67.
- the tie rod 67 maintains a posture parallel to the upper cross member 51 and the lower cross member 52.
- the left bracket 317 connected to the left side member 53 tilts to the left.
- the left shock absorbing mechanism 33 connected to the left bracket 317 is tilted to the left.
- the left buffer mechanism 33 is tilted to the left, the left front wheel 31 supported by the left buffer mechanism 33 is tilted to the left while maintaining a posture parallel to the head pipe 211.
- the right bracket 327 connected to the right side member 54 tilts to the left.
- the right shock absorbing mechanism 34 connected to the right bracket 327 tilts leftward.
- the right shock absorber 34 tilts to the left the right front wheel 32 supported by the right shock absorber 34 tilts to the left while maintaining a posture parallel to the head pipe 211.
- the above description regarding the tilting operation of the left front wheel 31 and the right front wheel 32 is based on the vertical direction.
- the vertical direction of the body frame 21 does not coincide with the vertical vertical direction.
- the relative positions of the left front wheel 31 and the right front wheel 32 with respect to the body frame 21 change when the link mechanism 5 is operated.
- the link mechanism 5 tilts the vehicle body frame 21 with respect to the vertical direction by changing the relative positions of the left front wheel 31 and the right front wheel 32 to the vehicle body frame 21 in the vertical direction of the vehicle body frame 21.
- each element tilts to the right. Since the movement of each element is only reversed left and right, detailed description is omitted.
- FIG. 6 is a front view of the front portion of the vehicle when the vehicle 1 is tilted and steered.
- a state in which the vehicle 1 is steered leftward while being tilted leftward is shown.
- the left front wheel 31 and the right front wheel 32 are rotated leftward by the steering operation, and the left front wheel 31 and the right front wheel 32 are inclined leftward together with the vehicle body frame 21 by the inclination operation. That is, in this state, the link mechanism 5 has a parallelogram shape, and the tie rod 67 has moved leftward and rearward from the position of the body frame 21 in the upright state.
- FIG. 7A is a front view of a part of the inner fender 225 as viewed from the front of the vehicle 1.
- FIG. 7B is a cross-sectional view taken along line AA in FIG.
- the body frame 21 is in an upright state.
- FIG. 7A shows a state in which the left front wheel 31, the right front wheel 32, and the pair of left and right front fenders 223 are seen through.
- FIG. 7B the positions of the left front wheel 31 and the right front wheel 32 with respect to the inner fender 225 are indicated by broken lines.
- the inner fender 225 is attached to a down frame 212 that is a part of the vehicle body frame 21.
- the inner fender 225 includes a front cover 225a and a rear cover 225b.
- the front cover 225 a extends in the vertical direction of the body frame 21 along the down frame 212.
- the rear cover 225b is disposed behind the down frame 212 in the front-rear direction of the body frame 21.
- the rear cover 225 b extends along the down frame 212 in the vertical direction of the body frame 21.
- the inner fender 225 is disposed behind the left front wheel 31 and the right front wheel 32 in the front-rear direction of the body frame 21.
- the inner fender 225 is disposed in front of the vehicle body frame 21 in the front-rear direction from the engine unit 25.
- the inner fender 225 is disposed in front of the vehicle body frame 21 in the front-rear direction from a footrest 229 (only the position is indicated by a two-dot chain line) on which an occupant places his / her foot.
- the inner fender 225 has a lower cover part 70.
- the lower cover portion 70 is disposed behind the vehicle body frame 21 in the front-rear direction from the rear end portions FWB of the left front wheel 31 and the right front wheel 32 when the steering device 7 is not steered.
- the lower cover part 70 is disposed below the upper end FWU of the left front wheel 31 and the right front wheel 32 in the vertical direction of the body frame 21.
- the lower cover part 70 includes a left front part 713 and a right front part 723.
- the left front surface portion 713 is disposed on the left side of the body frame 21 in the left-right direction with respect to the down frame 212.
- the right front surface portion 723 is disposed on the right side of the vehicle body frame 21 in the left-right direction from the down frame 212.
- the lower cover part 70 includes a left protruding part 711 and a right protruding part 721.
- the left protrusion 711 and the right protrusion 721 protrude forward in the front-rear direction of the body frame 21.
- the left protrusion 711 extends in the vertical direction of the body frame 21, and a lower portion thereof is curved toward the right in the left-right direction of the body frame 21.
- the right protruding portion 721 extends in the vertical direction of the body frame 21, and the lower portion thereof is curved toward the left in the left-right direction of the body frame 21.
- the left front surface portion 713 extends so as to incline to the rear of the vehicle body frame 21 toward the left in the left-right direction of the vehicle body frame 21, and is connected to the left protrusion 711 at the left connection portion 714.
- the right front surface portion 723 extends so as to incline to the rear of the front and rear of the body frame 21 as it goes rightward in the left-right direction of the body frame 21, and is connected to the right protruding portion 721 at the right connection portion 724. .
- FIG. 8 is a right side view showing the appearance of the vehicle 1 as viewed from the right.
- FIG. 9 schematically shows the positional relationship of the element group in the lower part of the vehicle 1 located below the alternate long and short dash line V in FIG.
- a one-dot chain line V is a line connecting the upper end of the front wheel 3 and the upper end of the rear wheel 4. 8 and 9, the vehicle body frame 21 is in an upright state, and the left front wheel 31 and the right front wheel 32 are not rotated by the steering device 7.
- the state in which the left front wheel 31 and the right front wheel 32 are not rotated means the direction of the straight line CL passing through the front end and the rear end of the left front wheel 31 and the front end and the rear end of the right front wheel 32 shown in FIG. Means the state in which the direction of the straight line CR passing through coincides with the front-rear direction of the body frame 21.
- the state in which the left front wheel 31 and the right front wheel 32 are not rotated is the state of the left front wheel 31 and the right front wheel 32 when the vehicle is traveling straight.
- this state does not limit whether the vehicle is moving or stopped. This state includes the case where the vehicle is moving and the case where it is stopped. The following description referring to FIGS. 8 and 9 assumes this state.
- the engine unit 25 is disposed behind the left front wheel 31 and the right front wheel 32 in the front-rear direction of the body frame 21.
- the engine unit 25 includes an engine 71 and a power transmission unit 72.
- the engine 71 generates driving force for the vehicle 1.
- the power transmission unit 72 connects the engine 71 and the rear wheel 4.
- the power transmission unit 72 includes a speed change mechanism 72a as a power transmission mechanism.
- As a power transmission mechanism included in the power transmission unit 72 a belt, a chain, or the like may be provided.
- the power transmission unit 72 transmits the driving force of the engine 71 to the rear wheel 4. When the driving force of the engine 71 is transmitted to the rear wheel 4 by the power transmission unit 72, the vehicle 1 travels.
- the engine unit 25 is supported by the vehicle body frame 21 so as to be displaceable in the vertical direction of the vehicle body frame 21.
- the vehicle 1 includes a fan 79.
- the fan 79 is disposed so as to generate an airflow that dissipates heat generated from the engine 71 by cooling a part of the engine unit 25 while the vehicle 1 is traveling.
- an axial fan, a centrifugal fan (sirocco type, turbo type), a mixed flow fan, or a cross flow fan can be used as appropriate.
- the fan 79 may be a mechanical type that is rotated by the driving force of the engine 71 or an electric type that is driven by the supply of electric power.
- the vehicle 1 includes a ventilation opening 74.
- the ventilation opening 74 is provided so that the airflow toward the fan 79 passes while the vehicle 1 is traveling.
- the ventilation opening 74 has a rear cover 70 in the front and rear direction of the body frame 21 of the lower cover portion 70 of the inner fender 225, and a front and rear direction of the vehicle body frame 21 from the rear end BWB of the rear wheel 4.
- the ventilation opening for taking in air for cooling the heat dissipation device which is a part of the engine unit, is formed on the front surface of the front cover that covers at least a part of the steering device. Is provided. Since this arrangement can receive a high-velocity airflow generated from the front of the vehicle as it travels from the front, from the viewpoint of efficiently using the airflow to cool part of the engine unit efficiently, It is suitable. In fact, the inventor has confirmed that a sufficient cooling effect of the engine unit is obtained by the arrangement.
- a link mechanism that links the two front wheels is housed in the front cover. Further, by accommodating the heat dissipation device in the front cover, the front cover is enlarged and the vehicle is enlarged. Further, since it is necessary to dispose the heat dissipation device while avoiding the link mechanism, the degree of freedom in layout of the heat dissipation device and the ventilation opening is limited.
- the inventor studied a configuration capable of efficiently cooling the engine unit 25 while reducing the size of the vehicle 1. Specifically, the flow of air around the vehicle 1 was analyzed, and it was examined whether there was any other position where the air velocity was high and air could be taken in efficiently.
- a body frame 21 that leans to the left of the vehicle 1 when turning left and leans to the right of the vehicle 1 when turning right;
- a left front wheel 31 and a right front wheel 32 arranged side by side in the left-right direction of the body frame 21,
- a rear wheel 4 disposed behind the left front wheel 31 and the right front wheel 32 in the front-rear direction of the body frame 21;
- a link mechanism 5 that changes the relative positions of the left front wheel 31 and the right front wheel 32 with respect to the vehicle body frame 21 to incline the vehicle body frame 21 to the left or right of the vehicle 1;
- a front cover 221 covering at least a part of the link mechanism 5;
- An engine unit 25 including an engine 71 and disposed behind the left front wheel 31 and the right front wheel 32 in the front-rear direction of the body frame 21; From the rear end portions FWB of the left front wheel 31 and the right front wheel 32 to the rear of the vehicle body frame 21 in the front-
- FIG. 10 shows the result.
- FIG. 10A shows the speed of air flowing around the vehicle 1 at a position about the height of the occupant's waist in the vertical direction of the body frame 21.
- FIG. 10B shows the velocity of air flowing around the lower portion of the vehicle 1 (that is, below the line V in FIG. 8). The darker the color, the slower the air velocity.
- FIG. 11 shows the result of analyzing the velocity of the air flowing around when the vehicle 81 as a comparative example travels.
- the vehicle 81 is a general two-wheel vehicle including a front wheel 83 and a rear wheel 84.
- FIGS. 11A and 11B show the velocity of air flowing around the vehicle 81 at heights corresponding to FIGS. 10A and 10B, respectively. The darker the color, the slower the air velocity.
- the inventor is in the rear and rear left and right front wheels of the vehicle body frame 21 of the lower cover portion 70.
- the velocity of the airflow is relatively high in a region to the left of the left end LWL 31 of the vehicle 31 and to the right of the right end RWR of the right front wheel 32 (ie, a position relatively distant from the vehicle center in the left-right direction of the body frame 21). Found that the region exists.
- the body frame 21 of the vehicle 1 cannot be increased in size in the left-right direction.
- the inventor has the rear cover 70 in the front-rear direction of the vehicle body frame 21 in the front and rear direction of the lower cover portion 70 in a state where the vehicle body frame 21 is upright and the left front wheel 31 and the right front wheel 32 are not rotated by the steering device 7. From the rear end BWB of the wheel 4 in the front-rear direction of the vehicle body frame 21, from the left end LWL of the left front wheel 31 to the right in the left-right direction of the vehicle body frame 21, and from the right end RWR of the right front wheel 32 It has been found that there is a region where the velocity of the airflow is relatively slow in the region to the left of.
- the region where the velocity of the airflow is relatively slow is a region where the atmospheric pressure is relatively high. Therefore, the inventor changed the way of thinking and thought that it would be possible to efficiently take in air by providing a fan 79 in such a region to generate a pressure difference.
- the inventor configured the fan 79 to generate an air flow that cools a part of the engine unit 25 during traveling. Further, the inventor makes the ventilation opening 74 through which the airflow toward the fan 79 passes during traveling in an upright state of the vehicle body frame 21 and a state in which the left front wheel 31 and the right front wheel 32 are not rotated by the steering device 7.
- the rear cover 70 is rearward in the front-rear direction of the body frame 21, the front end in the front-rear direction of the body frame 21 from the rear end BWB of the rear wheel 4, and the left-right direction of the body frame 21 from the left end LWL of the left front wheel 31. And on the left side in the left-right direction of the body frame 21 from the right end RWR of the right front wheel 32.
- the rear cover 4 is rearward in the front-rear direction of the body frame 21 and the rear wheel 4 is rearward. From the end BWB in the front-rear direction of the body frame 21, from the left end LWL of the left front wheel 31 to the right in the left-right direction of the body frame 21, and from the right end RWR of the right front wheel 32 to the left in the left-right direction of the body frame 21 The area is relatively extensive.
- the engine unit 25 can be efficiently cooled while downsizing the vehicle 1 including the leanable vehicle body frame 21 and the two front wheels 3 arranged side by side in the left-right direction of the vehicle body frame 21.
- the engine unit 25 includes a radiator 77 and a radiator hose 78.
- the radiator 77 is disposed in the vicinity of the engine 71.
- the radiator hose 78 connects the radiator 77 and the engine 71.
- the radiator 77 is filled with a coolant (such as water) for cooling the engine 71.
- a coolant such as water
- the engine 71 is cooled.
- the radiator 77 exchanges heat between the coolant and air to dissipate the heat of the coolant. That is, the engine unit 25 according to the present embodiment is a water cooling type.
- the vehicle 1 includes a radiator cover 73.
- the radiator cover 73 is disposed so as to cover the radiator 77.
- the vent opening 74 described above is formed in the radiator cover 73.
- the radiator 77 is arranged so that the airflow that has passed through the ventilation opening 74 comes into contact therewith.
- the water-cooled engine unit 25 can be efficiently used while downsizing the vehicle 1 including the leanable vehicle body frame 21 and the two front wheels 3 arranged side by side in the left-right direction of the vehicle body frame 21. Can cool well.
- the radiator 77 is disposed at a position where the airflow toward the fan 79 passes.
- the engine unit 25 can be cooled more efficiently while downsizing the vehicle 1 including the leanable vehicle body frame 21 and the two front wheels 3 arranged side by side in the left-right direction of the vehicle body frame 21.
- the engine 71 is arranged so that the airflow that has passed through the ventilation opening 74 contacts.
- the engine 71 as a heat source can be efficiently cooled. Therefore, the engine unit 25 can be cooled more efficiently while downsizing the vehicle 1 including the leanable vehicle body frame 21 and the two front wheels 3 arranged side by side in the left-right direction of the vehicle body frame 21.
- the fan 79 is disposed at a position where the airflow toward the engine 71 passes.
- the airflow generated by driving the fan 79 can be efficiently sent to the engine 71 which is a heat source. Therefore, the engine unit 25 can be cooled more efficiently while downsizing the vehicle 1 including the leanable vehicle body frame 21 and the two front wheels 3 arranged side by side in the left-right direction of the vehicle body frame 21.
- the ventilation opening 74 opens so as to intersect the left-right direction of the vehicle body frame 21.
- the air that cools a part of the engine unit 25 can be efficiently taken in by using the pressure difference generated by driving the fan 79.
- the necessity of providing a structure that actively receives the airflow flowing from the front to the rear of the vehicle 1 on the left or right side of the vehicle 1 is reduced. Therefore, the engine unit 25 can be efficiently cooled while further downsizing the vehicle 1 including the leanable vehicle body frame 21 and the two front wheels 3 arranged side by side in the left-right direction of the vehicle body frame 21.
- the fan 79 generates an air flow that cools a part of the engine unit 25 while the vehicle 1 is traveling.
- “running” does not limit all the time during which the vehicle 1 is traveling, but means at least part of the time during which the vehicle 1 is traveling. That is, the fan 79 may be driven continuously while the vehicle 1 is traveling, or may be driven intermittently. The fan 79 may be driven in a state other than traveling, such as when the vehicle 1 is idling.
- the vehicle body frame 21 of the lower cover portion 70 is formed when the entire ventilation opening 74 is in the upright state of the body frame 21 and the left front wheel 31 and the right front wheel 32 are not rotated by the steering device 7.
- the vehicle body frame 21 from the rear end BWB of the rear wheel 4 the right side of the vehicle body frame 21 from the left end LWL of the left front wheel 31, and the right front wheel 32.
- the vehicle body 21 is disposed in the left region in the left-right direction from the right end RWR.
- a part of the ventilation opening 74 may be disposed outside the region.
- the ventilation opening 74 is formed in the radiator cover 73.
- the arrangement of the ventilation openings 74 can be set as appropriate.
- the ventilation opening 74 can be formed at an appropriate position of the vehicle body cover 22.
- the ventilation opening 74 opens so as to intersect the left-right direction of the vehicle body frame 21.
- the direction of the ventilation opening 74 can be set appropriately.
- the ventilation opening 74 may be configured to open so as to intersect at least one of the front-rear direction and the vertical direction of the body frame 21.
- the radiator 77 is arranged at a position where the airflow toward the fan 79 passes. That is, the radiator 77 is disposed upstream of the fan 79 with respect to the airflow generated by driving the fan 79.
- the radiator 77 may be disposed at a position where the airflow that has passed through the fan 79 contacts. That is, the radiator 77 may be disposed downstream of the fan 79 with respect to the airflow generated by driving the fan 79.
- the fan 79 is disposed at a position where the airflow toward the engine 71 passes. That is, the engine 71 is disposed downstream of the fan 79 with respect to the airflow generated by driving the fan 79. However, the engine 71 may be disposed at a position where the airflow toward the fan 79 passes. That is, the engine 71 may be disposed upstream of the fan 79 with respect to the airflow generated by driving the fan 79.
- the engine unit 25 is a water-cooled type including the radiator 77.
- the engine 71 is arranged so that the airflow that has passed through the ventilation opening 74 comes into contact with the airflow opening 74, an air-cooled engine unit that does not use the radiator 77 may be provided.
- an opening may be provided below the fan 79 or below the engine 71 so that airflow that has passed through the fan 79 is released to the lower side of the vehicle 1.
- the speed of the air flowing below the vehicle 1 during traveling is faster than the speed of the air flowing through the position where the ventilation opening 74 is provided. Therefore, the pressure below the vehicle 1 is lower than the pressure at the position where the ventilation opening 74 is provided. Therefore, according to such a structure, the airflow which cools a part of engine unit 25 can be smoothly flowed. Accordingly, the engine unit 25 can be efficiently cooled while further downsizing the vehicle 1 including the body frame 21 that can be tilted and the two front wheels 3 arranged side by side in the left-right direction of the body frame 21.
- the left shock absorbing mechanism 33 and the right shock absorbing mechanism 34 each include a pair of telescopic mechanisms.
- the number of the telescopic mechanisms provided in each of the left buffer mechanism 33 and the right buffer mechanism 34 may be one.
- the vehicle 1 includes one rear wheel 4.
- the number of rear wheels may be plural.
- the center in the left-right direction of the body frame 21 of the rear wheel 4 coincides with the center of the distance between the left front wheel 31 and the right front wheel 32 in the left-right direction of the body frame 21.
- the center in the left-right direction of the body frame 21 of the rear wheel 4 may not coincide with the center of the distance between the left front wheel 31 and the right front wheel 32 in the left-right direction of the body frame 21.
- the link mechanism 5 includes the upper cross member 51 and the lower cross member 52.
- the link mechanism 5 may include a cross member other than the upper cross member 51 and the lower cross member 52.
- the “upper cross member” and the “lower cross member” are merely named based on the relative vertical relationship.
- the upper cross member does not mean the uppermost cross member in the link mechanism 5.
- the upper cross member means a cross member located above another cross member below the upper cross member.
- the lower cross member does not mean the lowest cross member in the link mechanism 5.
- the lower cross member means a cross member located below another cross member above it.
- At least one of the upper cross member 51 and the lower cross member 52 may be composed of two parts, a right cross member and a left cross member.
- the upper cross member 51 and the lower cross member 52 may be configured by a plurality of cross members as long as they have a link function.
- the link mechanism 5 constitutes a parallel four-bar link.
- the link mechanism 5 may adopt a double wishbone configuration.
- the term “parallel” is meant to include two straight lines that are inclined within a range of ⁇ 40 ° but do not intersect as members.
- the term “along” used in the present specification with respect to directions and members includes the case of tilting within a range of ⁇ 40 °.
- the term “extends in a direction” means to include a case where it is inclined within a range of ⁇ 40 ° with respect to the direction.
- the present invention includes equivalent elements, modifications, deletions, combinations (for example, combinations of features over various embodiments), improvements, and changes that can be recognized by those skilled in the art based on the exemplary embodiments disclosed herein. All embodiments are encompassed. Claim limitations should be construed broadly based on the terms used in the claims and should not be limited to the embodiments described herein or in the process of this application. Such an embodiment should be construed as non-exclusive. For example, in the present specification, the terms “preferably” and “good” are non-exclusive, and “preferably but not limited to” “good but not limited thereto”. "Means.
- a front lower cover part formed so as to cover a region below the upper end of the first front wheel and the second front wheel;
- a drive source disposed behind the front lower cover portion and capable of generating vehicle drive force; Ventilation that is disposed behind the front lower cover portion and below the upper ends of the first front wheel and the second front wheel, and is formed so that air for cooling the drive source passes therethrough.
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Abstract
Description
左旋回時に前記車両の左方へ傾斜し、右旋回時に前記車両の右方へ傾斜する車体フレームと、
前記車体フレームの左右方向に並んで配置された左前輪および右前輪と、
前記左前輪と前記右前輪より前記車体フレームの前後方向の後方に配置された後輪と、
前記車体フレームに対する前記右前輪と前記左前輪の相対位置を変更して前記車体フレームを前記左方または前記右方に傾斜させるリンク機構と、
前記リンク機構の少なくとも一部を覆うフロントカバーと、
前記左前輪と前記右前輪を回動させる操舵装置と、
エンジンを含み、前記左前輪および前記右前輪より前記前後方向の後方に配置されたエンジンユニットと、
前記左前輪と前記右前輪の各後端部より前記前後方向の後方、かつ、前記エンジンユニットより前記前後方向の前方、かつ、前記左前輪と前記右前輪の各上端より前記車体フレームの上下方向の下方に配置された下カバー部を有するインナーフェンダーと、
少なくとも走行中において、前記エンジンユニットの一部を冷却することにより前記エンジンより発生した熱を放散させる気流を発生させるファンと、
前記車体フレームの直立状態かつ前記操舵装置により前記左前輪および前記右前輪が回動されていない状態において、前記下カバー部の前記前後方向の後方、かつ、前記後輪の後端より前記前後方向の前方、かつ、前記左前輪の左端より前記左右方向の右方、かつ、前記右前輪の右端より前記左右方向の左方に少なくとも一部が配置され、少なくとも走行中において前記ファンに向かう気流が通過する通気開口部と、
を備えている。
左旋回時に車両の左方へ傾斜し、右旋回時に車両の右方へ傾斜する車体フレームと、
前記車体フレームの左右方向に並んで配置された左前輪および右前輪と、
前記左前輪と前記右前輪より前記車体フレームの前後方向の後方に配置された後輪と、
前記車体フレームに対する前記右前輪と前記左前輪の相対位置を変更して前記車体フレームを前記左方または前記右方に傾斜させるリンク機構と、
前記リンク機構の少なくとも一部を覆うフロントカバーと、
前記左前輪と前記右前輪を回動させる操舵装置と、
エンジンを含み、前記左前輪および前記右前輪より前記前後方向の後方に配置されたエンジンユニットと、
前記左前輪と前記右前輪の各後端部より前記前後方向の後方、かつ、前記エンジンユニットより前記前後方向の前方、かつ、前記左前輪と前記右前輪の各上端より前記車体フレームの上下方向の下方に配置された下カバー部を有するインナーフェンダーと、
を備えている車両の走行時に周囲を流れる空気の速度を解析した。
前記ラジエータは、前記通気開口部を通過した前記気流が接触するように配置されている、
構成としてもよい。
左旋回時に車両1の左方へ傾斜し、右旋回時に車両1の右方へ傾斜する車体フレーム21と、
車体フレーム21の左右方向に並んで配置された左前輪31および右前輪32と、
左前輪31と右前輪32より車体フレーム21の前後方向の後方に配置された後輪4と、
車体フレーム21に対する左前輪31と右前輪32の相対位置を変更して車体フレーム21を車両1の左方または右方に傾斜させるリンク機構5と、
リンク機構5の少なくとも一部を覆うフロントカバー221と、
左前輪31と右前輪32を回動させる操舵装置7と、
エンジン71を含み、左前輪31および右前輪32より車体フレーム21の前後方向の後方に配置されたエンジンユニット25と、
左前輪31と右前輪32の各後端部FWBより車体フレーム21の前後方向の後方、かつ、エンジンユニット25の車体フレーム21の前後方向の前方、かつ、左前輪31と右前輪32の各上端FWUより車体フレーム21の上下方向の下方に配置された下カバー部70を有するインナーフェンダー225と、
を備えている車両1の走行時に周囲を流れる空気の速度を解析した。
車両の車幅方向中央より左側に配置される第1前輪と、
車両の車幅方向中央より右側に配置される第2前輪と、
車両側面視で前記第1前輪および前記第2前輪の車両後方に配置されるとともに乗員の足載せ部の車両前方に配置され、車両正面視で前記第1前輪と前記第2前輪の間にわたって少なくとも前記第1前輪および前記第2前輪の上端より下方側の領域を覆うように形成されるフロント下部カバー部と、
前記フロント下部カバー部より車両後方に配置されるとともに、車両駆動力を発生することが可能な駆動源と、
前記フロント下部カバー部より車両後方であって且つ前記第1前輪および前記第2前輪の上端部より下方に配置されるとともに、前記駆動源を冷却するための風が通過するように形成された通気開口部と、
前記通気開口部を通過する風の流速を上げるためのファンと、
を備える、鞍乗型車両。
前記駆動源を冷却するためのラジエータを有し、
前記ラジエータは、前記通気開口部を通過する風が触れる位置に配置されている、(1)に記載の鞍乗型車両。
前記ラジエータを含む水平断面視において、前記ファンは、前記ラジエータと前記駆動源との間に配置されている、(2)に記載の鞍乗型車両。
前記駆動源は、前記通気開口部から流出入した風が直接触れる位置に配置されている、(1)に記載の鞍乗型車両。
前記通気開口部は、車両側方に向けて開口するように形成されている、(1)から(4)のいずれかに記載の鞍乗型車両。
Claims (6)
- 車両であって、
左旋回時に前記車両の左方へ傾斜し、右旋回時に前記車両の右方へ傾斜する車体フレームと、
前記車体フレームの左右方向に並んで配置された左前輪および右前輪と、
前記左前輪と前記右前輪より前記車体フレームの前後方向の後方に配置された後輪と、
前記車体フレームに対する前記右前輪と前記左前輪の相対位置を変更して前記車体フレームを前記左方または前記右方に傾斜させるリンク機構と、
前記リンク機構の少なくとも一部を覆うフロントカバーと、
前記左前輪と前記右前輪を回動させる操舵装置と、
エンジンを含み、前記左前輪および前記右前輪より前記前後方向の後方に配置されたエンジンユニットと、
前記左前輪と前記右前輪の各後端部より前記前後方向の後方、かつ、前記エンジンユニットより前記前後方向の前方、かつ、前記左前輪と前記右前輪の各上端より前記車体フレームの上下方向の下方に配置された下カバー部を有するインナーフェンダーと、
少なくとも走行中において、前記エンジンユニットの一部を冷却することにより前記エンジンより発生した熱を放散させる気流を発生させるファンと、
前記車体フレームの直立状態かつ前記操舵装置により前記左前輪および前記右前輪が回動されていない状態において、前記下カバー部の前記前後方向の後方、かつ、前記後輪の後端より前記前後方向の前方、かつ、前記左前輪の左端より前記左右方向の右方、かつ、前記右前輪の右端より前記左右方向の左方に少なくとも一部が配置され、少なくとも走行中において前記ファンに向かう気流が通過する通気開口部と、
を備えている、車両。 - 前記エンジンユニットは、ラジエータを含んでおり、
前記ラジエータは、前記通気開口部を通過した前記気流が接触するように配置されている、
請求項1に記載の車両。 - 前記ラジエータは、前記ファンに向かう気流が通過する位置に配置されている、
請求項2に記載の車両。 - 前記通気開口部を通過した前記気流が接触するように前記エンジンが配置されている、
請求項1から3のいずれか一項に記載の車両。 - 前記ファンは、前記エンジンに向かう気流が通過する位置に配置されている、
請求項4に記載の車両。 - 前記通気開口部は、前記左右方向に交差するように開口している、
請求項1から5のいずれか一項に記載の車両。
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