JP4535487B2 - Saddle riding vehicle - Google Patents

Description

  According to the present invention, a drive unit pivotally supported by a vehicle body includes an internal combustion engine, a radiator that cools cooling water for the internal combustion engine, and a cooling water tube that allows the radiator and the internal combustion engine to communicate with each other. The present invention relates to a straddle-type vehicle provided.

  Conventionally, the saddle riding type vehicle is disclosed in Patent Document 1 below. According to this publication, the front wheel supported on the front portion of the vehicle body and the front side of the vehicle are pivotally supported on the vehicle body by the pivot shaft extending in the width direction of the vehicle body so that the rear side can swing up and down. And a rear wheel disposed on the center of the body frame in the width direction and supported on the rear portion of the drive unit.

  The drive unit includes an internal combustion engine for driving and driving, a radiator that is displaced from the center of the vehicle body to one side and cools the cooling water for cooling the internal combustion engine, and is formed in the radiator and the internal combustion engine. And a cooling water tube that communicates with the water jacket.

  When the vehicle travels with the driving force output from the internal combustion engine, the internal combustion engine tends to reach a high temperature due to the output of the driving force. However, since the cooling water is cooled by the radiator and the cooling water flows into the water jacket in the internal combustion engine through the cooling water tube, the internal combustion engine is cooled, so that the high temperature of the internal combustion engine is prevented. Is done.

JP 2000-203483 A

  By the way, in the prior art, the pivot shaft is disposed in front of the radiator in a side view of the vehicle body, and the cooling water tube is provided so as to straddle the pivot shaft from above.

  For this reason, if the drive unit is operated with respect to the vehicle body in an attempt to pivot or disengage, the cooling water tube may become an obstacle. On the other hand, if the cooling water tube is to be connected to or detached from the internal combustion engine and the radiator, the pivot shaft may become an obstacle. That is, when the assembly, maintenance, and inspection operations are performed on the pivot shaft and the cooling water tube, which are the components of the vehicle, they may interfere with each other, which may complicate the operations.

  The present invention has been made paying attention to the above-described circumstances, and an object of the present invention is to make it possible to easily perform assembly, maintenance, and inspection operations for vehicle components.

  Another object of the present invention is to improve the responsiveness from the time when fuel is supplied to an internal combustion engine for driving driving in a vehicle to the time when the internal combustion engine outputs driving force based on combustion of this fuel. That is.

  Still another object of the present invention is to make the bank angle of a vehicle larger when traveling.

  Still another object of the present invention is to prevent the high temperature more reliably when the vehicle is driven by the drive of the internal combustion engine and the internal combustion engine attempts to increase the temperature, and even in such a case. It is to make the bank angle of the vehicle sufficiently large.

According to the first aspect of the present invention, the vehicle body 2 includes a front wheel 5 supported on the front portion of the vehicle body 2 and a pivot shaft 8 whose front side extends in the width direction of the vehicle body 2 so that the rear side can swing up and down. And a rear wheel 10 supported on the rear portion of the drive unit 24. The drive unit 24 includes an internal combustion engine 28 for driving and a cooling for cooling the internal combustion engine 28. In a straddle-type vehicle comprising a radiator 46 that cools water 44 and a plurality of cooling water tubes 74 and 76 that allow the radiator 46 and a water jacket 47 formed in the internal combustion engine 28 to communicate with each other.
In the side view of the vehicle body 2, the pivot shaft 8 is disposed above a middle portion in the front-rear direction of the radiator 46, and the cooling water tubes 74 and 76 are disposed in front of the pivot shaft 8. Is.

Further, the vertical direction together with the respective connecting portions of the plurality of coolant tubes 74, 76 into the radiator 46 is located at the front end of the radiator 46, is formed to extend above the connecting portion in the longitudinal direction of the respective vehicle body 2 Are arranged side by side .

According to a second aspect of the present invention, in addition to the first aspect of the invention, the internal combustion engine 28 includes a crankcase 31 that is pivotally supported on the vehicle body 2 by the pivot shaft 8 and an axial center that extends in the width direction of the vehicle body 2. A crankshaft 33 supported by the crankcase 31 so as to be capable of rotating A around 32, and a cylinder 34 protruding forward from the crankcase 31 and having the water jacket 47, and an upper region of the crankshaft 33 The above-mentioned pivot shaft 8 is arranged in the above.

According to a third aspect of the present invention, in addition to the first or second aspect of the present invention, the rear portion of the drive unit 24 is displaced to one side of the rear wheel 10 to virtually extend the axial direction of the pivot shaft 8. A recess 71 is formed on the upper surface of the radiator 46, which is located below the line and opens upward.

According to a fourth aspect of the present invention, in addition to any one of the first to third aspects of the invention, the front and rear wheels 5 and 10 are grounded to the horizontal road surface 25 to bring the vehicle 1 into a “running posture”. In the saddle riding type vehicle, the inner bottom surface 69 of the radiator 46 extends rearward when
A drainage port 65 that allows the cooling water 44 to be discharged from the inside of the radiator 46 is formed at the rear lower end of the radiator 46, and an opening / closing lid 66 that closes the drainage port 65 so as to be openable and closable is provided.

According to a fifth aspect of the present invention, in addition to any one of the first to fourth aspects of the present invention, the stand 15 provided in the vehicle body 2 and the front wheel 5 are grounded to a horizontal road surface 25, so that the vehicle 1 is In the “self-standing posture”, at least one of the ceiling surface 68 and the inner bottom surface 69 of the radiator 46 extends substantially horizontally.

According to a sixth aspect of the present invention, in addition to any one of the first to fifth aspects of the present invention, rotation A driving is possible around an axis 49 extending in the width direction of the vehicle body 2, and the width of the vehicle body 2 is increased. In a straddle-type vehicle provided with a fan 51 that is arranged inside the radiator 46 and that can supply external air B to the radiator 46,
The front end of the central portion in the vertical direction of the core 58 of the radiator 46 is positioned substantially at the same position as the front end of the rotation locus 86 of the blades 85 of the fan 51 in the longitudinal direction of the vehicle body 2, or the front end of the rotation locus 86 And the rear end of the central portion of the core 58 in the vertical direction is positioned substantially the same as the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2, or the rotation locus 86 It is located behind the rear end.

According to a seventh aspect of the present invention, in addition to any one of the first to sixth aspects of the present invention, rotation A driving is possible around an axis 49 extending in the width direction of the vehicle body 2, and the width of the vehicle body 2 is increased. A fan 51 is provided inside the radiator 46 and is capable of supplying external air B to the radiator 46. The fan 51 includes a plurality of blades 85 arranged in a circumferential direction around the axis 49. A straddle type in which air B outside the radiator 46 passes through the core 58 of the radiator 46 and is sucked into the internal space 87 of the rotation locus 86 of the blade 85 by the rotation of the fan 51. In a water cooling device in a vehicle,
The lower end of the central portion of the core 58 of the radiator 46 in the longitudinal direction of the vehicle body 2 is positioned at substantially the same height as the lower end of the inner peripheral surface 88 of the rotation locus 86 of the blade 85, or within the rotation locus 86. It is positioned above the lower end of the peripheral surface 88.

  In this section, the reference numerals appended to the above terms are not intended to limit the technical scope of the present invention to the contents of the “Examples” section described later.

  The effects of the present invention are as follows.

The invention according to claim 1 is pivotally supported on the vehicle body by a front wheel supported by the front portion of the vehicle body and a pivot shaft having a front side extending in the width direction of the vehicle body so that the rear side can swing up and down. A drive unit and a rear wheel supported at the rear portion of the drive unit are provided, and the drive unit is an internal combustion engine for driving and driving, a radiator for cooling the cooling water for cooling the internal combustion engine, the radiator and the above In a straddle-type vehicle comprising a plurality of cooling water tubes that communicate with a water jacket formed in an internal combustion engine,
In the side view of the vehicle body, the pivot shaft is disposed above a middle portion in the front-rear direction of the radiator, and the entire cooling water tube is disposed in front of the pivot shaft.

  For this reason, the pivot shaft and the cooling water tube, which are the components of the vehicle, will be allocated to the front and rear, so that when performing the assembly, maintenance, and inspection operations on these pivot shaft and the cooling water tube, These are prevented from interfering with each other, and each of these operations can be facilitated.

Moreover , each connection part of the said several cooling water tube to the said radiator is located in the front-end part of the said radiator.

For this reason, the pivot shaft that is a component of the vehicle and each of the cooling water tubes are more clearly arranged in the front-rear direction, so that the pivot shaft and each of the cooling water tubes are assembled and maintained, When performing each work of inspection, it is prevented more reliably that they interfere with each other, and each of these work can be made easier.

According to a second aspect of the present invention, the internal combustion engine is supported by the crankcase so as to be rotatable about a crankcase pivotally supported on the vehicle body by the pivot shaft and an axis extending in the width direction of the vehicle body. A crankshaft and a cylinder having the water jacket projecting forward from the crankcase are provided, and the pivot shaft is disposed in an upper region of the crankshaft.

  Here, the vertical width dimension of the cylinder is generally shorter than that of the crankcase, and the pivot shaft is disposed in an upper region of the crankshaft so that the crankcase and the cylinder It is supposed to pivot our crankcase. For this reason, a surplus space can be secured above the crankcase and the cylinder between the protruding end of the cylinder and the pivot shaft, and the fuel can be supplied to the cylinder in this space. A feeding device can be arranged.

  Therefore, the pivot shaft, the crankcase, the cylinder, and the fuel supply device are arranged in a compact manner. Further, since the fuel supply device can be disposed immediately above the cylinder and is disposed close to the cylinder, the internal combustion engine is based on the combustion of the fuel from the time of fuel supply to the cylinder of the internal combustion engine by the fuel supply device. The responsiveness when the crankshaft reaches the point of time when it outputs the driving force is improved.

  Further, as described above, since the pivot shaft is arranged in the upper region of the crankshaft, the swing dimension of the crankcase when the internal combustion engine swings around the pivot shaft is determined by the pivot shaft. Compared with a case where the longitudinal direction of the vehicle body is far away from the crankshaft, it is suppressed to be small.

  Therefore, for example, in a crankcase that does not have an oil pan, the oil level fluctuation of the lubricating oil in the crankcase is suppressed to be small, and when the oil pan is attached to the lower surface of the crankcase, The oil level fluctuation of the lubricating oil is suppressed to be small, and therefore, an appropriate amount of the lubricating oil is more reliably supplied to each lubricated portion, and the lubrication is more reliably achieved.

According to a third aspect of the present invention, the rear portion of the drive unit is displaced to one side of the rear wheel, and the recess is located below the virtual extension line in the axial direction of the pivot shaft and opens upward. Is formed on the upper surface of the radiator.

  Therefore, the internal space of the recess can be used as a work space when the pivot shaft is operated by a tool on the axis of the pivot shaft, and the radiator is prevented from interfering with this operation. The

  In addition, as described above, a concave portion is formed on the upper surface of the radiator so that the radiator does not interfere with the operation to the pivot shaft. Therefore, the radiator is positioned higher as much as the concave portion is formed. be able to.

  For this reason, a predetermined vehicle height can be secured on the lower surface of the radiator. Therefore, when the vehicle is banked during traveling, the lower end of the radiator is prevented from contacting the road surface, and the bank angle of the vehicle is prevented. This produces an “effect” that can be taken sufficiently large.

  Here, as described above, since the rear portion of the drive unit is offset outward from the rear wheel, the radiator constituting the drive unit is moved outward from the center of the vehicle body according to the width dimension of the rear wheel. Tends to be greatly displaced. For this reason, when the vehicle is banked during traveling, the lower end of the radiator is more likely to come into contact with the road surface, and the bank angle may be further narrowed.

  Therefore, as described above, a recess is formed on the upper surface of the radiator so that the radiator is positioned higher. Therefore, the “effect” is effective for a vehicle having the above-described oscillating drive unit. Is particularly beneficial.

The invention of claim 4 is a straddle-type vehicle in which the inner bottom surface of the radiator extends rearwardly upward when the front and rear wheels are grounded on a horizontal road surface and the vehicle is brought into a “running posture”. In
A drain outlet that allows the cooling water to be discharged from the inside of the radiator is formed at a rear lower end portion of the radiator, and an opening / closing lid that closes the drain outlet so as to be openable and closable is provided.

  That is, since the opening / closing lid is provided at the rear lower end portion of the radiator whose inner bottom surface extends rearwardly, the opening / closing lid is positioned higher than that provided at the front side of the radiator. Be made.

  For this reason, a predetermined vehicle height can be secured on the lower surface of the opening / closing lid. Therefore, when the vehicle is banked during traveling, the lower end portion of the opening / closing lid is prevented from contacting the road surface, and the bank angle of the vehicle can be made sufficiently large.

According to a fifth aspect of the present invention, when the stand provided to the vehicle body and the front wheel are grounded on a horizontal road surface to bring the vehicle into a “self-supporting posture”, at least of the ceiling surface and the inner bottom surface of the radiator. Either one of the surfaces extends substantially horizontally.

  For this reason, when the vehicle is placed in a “self-supporting posture” in order to perform maintenance, inspection, etc. on the components of the vehicle, if the ceiling surface extends almost horizontally as described above, the upper end of the radiator is If the formed water supply port is opened to replenish the cooling water, even if the water supply port is formed in any of the longitudinal directions at the upper end of the radiator, almost the entire amount of air in the radiator is discharged to the outside. The cooling water is filled in the radiator. Therefore, the cooling of the cooling water by the radiator is prevented from being hindered by the residual air in the radiator.

  On the other hand, when the inner bottom surface extends substantially horizontally as described above, if the drain outlet formed at the lower end of the radiator is opened, substantially the entire amount of the cooling water in the radiator is discharged to the outside. Therefore, operations such as replacement of the cooling water can be performed quickly and easily.

According to a sixth aspect of the present invention, it is possible to rotate around an axis extending in the width direction of the vehicle body and to be disposed inward of the radiator in the width direction of the vehicle body, and to supply external air to the radiator. In a saddle-ride type vehicle equipped with a fan,
The front end of the central portion in the vertical direction of the core of the radiator is positioned substantially the same as the front end of the rotation trajectory of the fan blades in the longitudinal direction of the vehicle body, or is positioned forward of the front end of the rotation trajectory, In addition, the rear end of the central portion in the vertical direction of the core is located at substantially the same position as the rear end of the rotation locus in the longitudinal direction of the vehicle body, or is located behind the rear end of the rotation locus. .

  For this reason, the fan faces the radiator core in the longitudinal direction of the vehicle body in the axial direction of the fan. Therefore, according to the fan, sufficient air is supplied to the radiator core. The cooling water is sufficiently cooled, and the temperature of the internal combustion engine is more reliably prevented by this cooling water.

  Further, as described above, the front end of the central portion in the vertical direction of the core of the radiator is positioned substantially at the same position as the front end of the rotation locus of the fan blades in the longitudinal direction of the vehicle body, or from the front end of the rotation locus. And the rear end of the central portion of the core in the vertical direction of the core is positioned substantially at the same position as the rear end of the rotation locus in the longitudinal direction of the vehicle body, or more than the rear end of the rotation locus. Since the radiator tends to be large in the longitudinal direction of the vehicle body because it is positioned rearward, the vertical dimension can be suppressed small, so that a predetermined vehicle height can be secured on the lower surface of the radiator. Therefore, when the vehicle is banked during traveling, the lower end of the radiator is prevented from coming into contact with the road surface.

  In other words, as described above, the internal combustion engine can be prevented from being heated at a higher temperature, and even in this case, the bank angle of the vehicle can be made sufficiently large.

The invention according to claim 7 can be rotationally driven around an axis extending in the width direction of the vehicle body, and is disposed inward of the radiator in the width direction of the vehicle body, so that external air can be supplied to the radiator. A fan, and the fan includes a plurality of blades arranged in a circumferential direction around the axis, and the rotation of the fan causes air on the outside of the radiator to pass through the core of the radiator and In a water cooling device in a saddle riding type vehicle adapted to be sucked into the internal space of the rotation locus,
The lower end of the central portion of the radiator core in the longitudinal direction of the vehicle body is positioned at substantially the same height as the lower end of the inner peripheral surface of the rotation trajectory of the blade, or higher than the lower end of the inner peripheral surface of the rotation trajectory It is located in.

  Here, as described above, when the lower end of the central portion of the radiator core in the longitudinal direction of the vehicle body is positioned at substantially the same height as the lower end of the inner peripheral surface of the rotation locus of the blade, the fan At least the lower part of the radiator substantially faces the radiator core in the axial direction of the fan so that sufficient air is supplied to the core, and the cooling water is sufficiently cooled by the radiator. High temperature of the internal combustion engine can be prevented more reliably.

  Further, as described above, the lower end of the center portion of the radiator core in the longitudinal direction of the vehicle body is positioned at substantially the same height as the lower end of the inner peripheral surface of the rotation locus of the blade, or the inner periphery of the rotation locus Since it is positioned above the lower end of the surface, the lower end of the core of the radiator is prevented from becoming unnecessarily low, and a predetermined vehicle height can be secured on the lower surface of the radiator. Therefore, when the vehicle is banked during traveling, the lower end of the radiator is prevented from coming into contact with the road surface.

  In other words, as described above, the internal combustion engine can be prevented from being heated at a higher temperature, and even in this case, the bank angle of the vehicle can be made sufficiently large.

  With regard to the saddle riding type vehicle of the present invention, the best mode for carrying out the present invention is to realize the object of facilitating the assembly, maintenance, and inspection of the vehicle components. It is as follows.

  That is, the vehicle has a front wheel supported on the front portion of the vehicle body and a drive that is pivotally supported on the vehicle body by a pivot shaft that extends in the width direction of the vehicle body so that the rear side can swing up and down. A unit and a rear wheel disposed on the center of the body frame in the width direction and supported on the rear portion of the drive unit are provided.

The drive unit is formed in the traveling drive internal combustion engine, a radiator that is displaced from one side of the center of the vehicle body and cools the cooling water for cooling the internal combustion engine, and the radiator and the internal combustion engine. A plurality of cooling water tubes communicating with each other.

In the side view of the vehicle body, the pivot shaft is disposed above a middle part in the front-rear direction of the radiator, and the entire cooling water tube is disposed in front of the pivot shaft. Each connection part of the said several cooling water tube to the said radiator is located in the front-end part of the said radiator. The connecting portions are formed so as to extend in the front-rear direction of the vehicle body, and are arranged in the vertical direction.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In FIG. 1, reference numeral 1 denotes a scooter type motorcycle which is an example of a saddle-type vehicle, and an arrow Fr indicates the front in the traveling direction of the vehicle 1. The left and right described below refer to the width direction of the vehicle body 2 of the vehicle 1 toward the front.

  The vehicle body 2 includes a vehicle body frame 3 that constitutes a skeleton of the vehicle body 2, a front fork 4 that is slidably supported on the front end portion of the vehicle body frame 3, and a front frame 4 that is supported on the lower end portion of the front fork 4. The steering wheel 6 that is supported on the upper end of the front fork 4 and the steering wheel 6 that extends in the longitudinal direction (front-rear direction) of the vehicle body 2 so that the rear side of the front side can swing up and down. A rear arm 9 that is pivotally supported by a pivot shaft 8 at a middle portion in the front-rear direction of the body frame 3, a rear wheel 10 that is supported by a swinging end portion of the rear arm 9, a rear end portion of the body frame 3, and the above-mentioned A hydraulic cylinder type shock absorber 11 installed on the swinging end portion of the rear arm 9, a seat 12 supported on the upper surface of the rear portion of the vehicle body frame 3, and the longitudinal direction of the vehicle body 2 on the front side of the seat 12 Midway top A foot rest 13 formed, and a stand 15 that is pivotally supported by a pivot shaft 14 to the intermediate portion in the longitudinal direction of the rear arm 9.

  In all the drawings, the pivot shaft 8 has a bolt 20 having an axis 19 extending in the width direction of the vehicle body 2, and a nut 21 to be screwed to a threaded portion of the bolt 20. A pair of left and right upper brackets project downward from a middle portion in the longitudinal direction of the vehicle body frame 3 of the vehicle body 2. In addition, a pair of left and right lower brackets project from the front upper portion of the rear arm 9 upward. In addition, pivot holes 22 are formed in the upper and lower brackets, and the bolts 20 are removably fitted in the pivot holes 22 in the axial direction. A rear arm 9 is pivotally supported around an axis 19 of the eight bolts 20. The rear arm 9 can be removed from the vehicle body 2 by removing the bolts 20 from the pivot holes 22.

  The front and rear wheels 5 and 10 are positioned on the center 23 in the width direction of the vehicle body 2, and the rear arm 9 includes a drive unit 24 that outputs a driving force to the rear wheel 10 to drive the vehicle 1. The rear portion of the drive unit 24 is displaced to one side (right side) of the rear wheel 10.

  As shown by the solid line in FIG. 1, when the stand 15 is turned upward so as to be separated from the road surface 25 to the storage position, and the front and rear wheels 5, 10 are grounded to the road surface 25, the solid line in FIG. As shown, the vehicle 1 is in the “running posture”. On the other hand, if the rotating end of the stand 15 is rotated downward so as to contact the road surface 25, and the road surface 25 and the front wheel 5 are grounded to the road surface 25, the vehicle as shown by a one-dot chain line in FIG. 1 is a “self-supporting posture” in which the road surface 25 is independent.

  The drive unit 24 includes a travel drive source 26 for the vehicle 1, and a V-belt-wrapped automatic transmission mechanism 27, an automatic clutch, and a gear-type reduction mechanism for interlockingly connecting the rear wheel 10 to the drive source 26. I have. The drive source 26 is a four-cycle internal combustion engine 28, and an internal combustion engine body 29, which is the main body of the internal combustion engine 28, includes a crankcase 31 that is pivotally supported on the vehicle body frame 3 by the pivot shaft 8, and an axis 32. Extends in the width direction of the vehicle body 2 so as to be able to rotate A about the shaft center 32, and a crankshaft 33 supported on the crankcase 31 and from the crankshaft 33 toward the front which is a substantially horizontal direction. A projecting cylinder 34, an oil pan 35 attached to the bottom plate of the crankcase 31 and storing lubricating oil therein, and the lubricating oil in the oil pan 35 are covered by a support portion of the crankshaft 33 with respect to the crankcase 31. And an oil pump 36 for supplying the lubrication part.

Further, the internal combustion engine 28 is disposed in the vicinity of the intake pipe 37 extending upward from the upper surface of the cylinder 34 and then extending backward, and the intake air in the vicinity of the upper portion of the main body 29 of the internal combustion engine. A fuel supply device 38 interposed in the middle of the pipe 37 in the longitudinal direction and capable of supplying fuel into the cylinder 34 through the intake pipe 37 and extends downward from the lower surface of the cylinder 34 once. After that, in a plan view of the internal combustion engine body 29, the exhaust pipe 39 extending from one side (right side) of the internal combustion engine body 29 toward the rear is connected to the extended end of the exhaust pipe 39. A silencer 40, a spark plug 41 attached to an outer side of the cylinder 34 on one side (right side) of the internal combustion engine body 29, and a discharge part facing a combustion chamber in the cylinder 34, and the crankshaft 33 In A flywheel magneto 42 that is movably connected to generate power, and a connector 43 that is detachably fixed to the input end of the spark plug 41 and that can supply power generated by the flywheel magneto 42 to the spark plug 41. In addition, the input end of the spark plug 41 and the connector 43 protrude outward from the outer portion of the cylinder 34.

  In the illustrated example, the fuel supply device 38 is a carburetor, and the fuel supply device 38 is located near the upper portion of the internal combustion engine body 29 from the protruding end of the cylinder 34 of the internal combustion engine body 29, and is pivoted for the rear arm 9. It is arranged in the space between the support shafts 8.

  Further, the drive unit 24 includes a water cooling device 45 that cools the cylinder 34 of the internal combustion engine 28 that is the drive source 26 of the drive unit 24 with the cooling water 44. The water cooling device 45 is arranged to be deviated from the center 23 in the width direction of the vehicle body 2 to the one side (right side), and allows the cooling water 44 to be cooled by the external air B. The water pump 48 that circulates the cooling water 44 between the water jacket 47 formed in the cylinder 34 and the radiator 46 and the axis 49 extending in the width direction of the vehicle body 2 can be driven to rotate A. A centrifugal fan 51 that is disposed inward of the radiator 46 in the width direction of the vehicle body 2 and can supply external air B to the radiator 46, and the radiator 46 and the fan 51 are arranged in the width direction of the vehicle body 2. A resin cover that covers the radiator 46 and the fan 51 from the outside, covers the radiator 46 and the fan 51 from the front, rear, top, and bottom, and is fixed to the radiator 46 by a fastener 52. And a 53, this cover body 53, grille to allow circulating air B in the width direction of the vehicle body 2 is formed.

  The radiator 46 is disposed on the outer side of the crankcase 31 of the internal combustion engine body 29 on one side (right side) of the internal combustion engine body 29 and is detachably fixed to the crankcase 31 side by a fastener 55. ing.

  The radiator 46 includes an upper tank 56 that constitutes the upper end portion of the radiator 46 and extends in the longitudinal direction of the vehicle body 2, a lower tank 57 that constitutes the lower end portion of the radiator 46 and extends in the longitudinal direction of the vehicle body 2, and the upper tanks 56. And a lower tank 57 are connected to each other, and a core 58 having a plate shape as a whole is provided. The core 58 extends in the longitudinal direction and the vertical direction of the vehicle body 2. Further, the center of the core 58 is disposed in the vicinity of the upper portion of the axis 32 of the crankshaft 33 in a side view of the vehicle body 2 (FIGS. 1 and 2).

  The core 58 extends along the vertical direction and is provided in a plurality at predetermined intervals in the longitudinal direction of the vehicle body 2, and the metal water pipe 60 that communicates the insides of the upper tank 56 and the lower tank 57 with each other, and these water pipes 60 and 60, and a metal fin 61 is provided between 60 and 60, and external air B can pass through the fin 61 in the width direction of the vehicle body 2. When the cooling water 44 flows through the water pipes 60 from one of the upper tank 56 and the lower tank 57 to the other, the cooling water 44 exchanges heat with the air B through the fins 61. Then, the cooling water 44 is cooled.

  At the rear end of the upper tank 56, which is the rear upper end of the radiator 46, a water supply port 62 is formed so that the cooling water 44 can be supplied from the outside to the inside of the radiator 46. The water supply port 62 is opened and closed by a cap 63. Closed possible. A drain port 65 that allows the cooling water 44 to be discharged from the inside of the radiator 46 to the outside is formed at a rear end portion of the lower tank 57 that is a rear lower end portion of the radiator 46. The drain port 65 is an open / close that is a plug. The lid 66 is closed so that it can be opened and closed.

  The ceiling surface 68 inside the upper tank 56 and the inner bottom surface 69 inside the lower tank 57 of the radiator 46 are flat and extend in parallel with each other. When the front and rear wheels 5 and 10 are grounded to the horizontal road surface 25 and the vehicle 1 is set to the “running posture”, both the ceiling surface 68 and the inner bottom surface 69 of the radiator 46 extend rearwardly. It is said that.

  On the other hand, when the front wheel 5 and the stand 15 are grounded to the horizontal road surface 25 and the vehicle 1 is set to the “self-supporting posture”, the driving is performed as compared with the case where the vehicle 1 is in the “running posture”. The unit 24 has a slightly lowered posture, whereby at least one of the ceiling surface 68 and the inner bottom surface 69 of the radiator 46 extends substantially horizontally in the longitudinal direction of the vehicle body 2. In this case, although not shown, both the ceiling surface 68 and the inner bottom surface 69 extend substantially horizontally.

  In the side view of the vehicle body 2 (FIGS. 1 and 2), the pivot shaft 8 is disposed in the vicinity of the upper portion of the crankcase 31 and in the upper region of the shaft center 32 of the crankshaft 33, and the radiator 46 A pivot shaft 8 that pivotally supports the rear arm 9 is disposed in the vicinity of the upper surface of the upper tank 56 in the longitudinal direction of the upper tank 56. A groove-shaped recess 71 extending in the width direction of the vehicle body 2 is formed on the upper surface of the middle portion of the upper tank 56. The recess 71 is located below the virtual extension line in the axial direction of the pivot shaft 8 and opens upward.

  The water pump 48 is attached to the outer side of the cylinder 34 on the other side (left side) of the internal combustion engine body 29. The water pump 48 is interlocked and connected to the crankshaft 33 by chain winding means 73.

  The water cooling device 45 includes a first cooling water tube 74 that connects a front end portion of a lower tank 57 that is a front lower end portion of the radiator 46 and a suction portion of the water pump 48, a discharge portion of the water pump 48, and A second cooling water tube 75 that allows the lower part of the water jacket 47 in the lower part of the cylinder 34 of the internal combustion engine body 29 to communicate with each other, the upper part of the water jacket 47 in the upper part of the cylinder 34 of the internal combustion engine body 29, and the radiator 46 A third cooling water tube 76 communicating with the front end portion of the upper tank 56, which is a front upper end portion, and a thermostat 77 interposed between the upper portion of the water jacket 47 and the third cooling water tube 76; The cooling water tubes 74 to 76 are all made of resin.

  The first cooling water tube 74 has at least a halfway portion in the longitudinal direction below the cylinder 34 of the internal combustion engine body 29 and in front of the front portion 78 of the exhaust pipe 39 immediately after extending from the cylinder 34. Arranged in the space 79. In this case, a communication opening 80 communicating with the rear end of the first cooling water tube 74 is formed at the front end of the lower tank 57 of the radiator 46, and the communication opening 80 opens toward the front space 79. Yes.

  Further, in a plan view of the internal combustion engine body 29 (vehicle body 2), at least a part of the combination of the spark plug 41 and the connector 43 and at least a part of the first cooling water tube 74 are overlapped with each other. The second cooling water tube 75 is at least partially disposed in the rear space 81 below the cylinder 34 of the internal combustion engine body 29 and behind the base 78 of the exhaust pipe 39.

  In the side view of the vehicle body 2 (FIGS. 1 and 2), the first to third cooling water tubes 74 to 76 are such that the entire first to third cooling water tubes 74 to 76 are more than the pivot shaft 8. It is arranged in the front. The connecting portions of the first and third cooling water tubes 74 and 76 to the radiator 46 are located at the front end portions of the upper and lower ends of the radiator 46, respectively.

  An axis 49 of the fan 51 is shared with the axis 32 of the crankshaft 33, and the fan 51 includes a disc-shaped rotating plate 84 fixed to one end of the crankshaft 33, and the rotating plate. A plurality of blades 85 which are integrally projected on a surface of the radiator 46 side of 84 and arranged in a circumferential direction around the axis 49.

  When the fan 51 rotates A in conjunction with the crankshaft 33, the air B on the outer side of the radiator 46 in the width direction of the vehicle body 2 passes through the core 58 of the radiator 46 and reaches the rotation locus 86 of the blade 85. It is sucked into the internal space 87. On the other hand, the sucked air B passes between the blades 85 and 85 and is discharged outward in the radial direction. Further, the air B discharged in this manner is discharged to the outside through an opening (not shown) formed in the outer wall on the crankcase 31 side.

  The front and rear ends of the center portion in the vertical direction of the core 58 of the radiator 46 are respectively positioned in front and rear of the front and rear ends of the rotation locus 86 of the blade 85 of the fan 51 in the longitudinal direction of the vehicle body 2. It has been made. It should be noted that the front and rear ends of the center portion of the core 46 of the radiator 46 in the vertical direction are positioned substantially the same as the front and rear ends of the rotation locus 86 of the blades 85 of the fan 51 in the longitudinal direction of the vehicle body 2. May be. In addition, either one of the front and rear ends of the central portion in the vertical direction of the core 58 of the radiator 46 is positioned substantially at the same position as the front and rear ends of the rotation trajectory 86 of the blade 85, and the other is placed. The rotation locus 86 may be positioned in front of or behind the rear end.

  The upper end of the central portion in the longitudinal direction of the vehicle body 2 in the core 58 of the radiator 46 is positioned at substantially the same height as the upper end of the inner peripheral surface 88 of the rotation locus 86 of the blade 85. Further, the lower end of the central portion of the core 58 of the radiator 46 in the longitudinal direction of the vehicle body 2 is positioned above the lower end of the inner peripheral surface 88 of the rotation locus 86 of the blade 85. The lower end of the central portion of the core 58 in the longitudinal direction of the vehicle body 2 may be positioned at substantially the same height as the lower end of the inner peripheral surface 88 of the rotation locus 86.

  When the internal combustion engine 28 is driven, air B on the atmosphere side is drawn into the cylinder 34 of the internal combustion engine body 29 through the intake pipe 37 and fuel is supplied into the cylinder 34 by the fuel supply device 38. A mixture is generated. The air-fuel mixture is combusted by the discharge of the spark plug 41, and the combustion gas is discharged as exhaust C through the exhaust pipe 39. The driving force generated by the combustion in the cylinder 34 is output from the crankshaft 33 and can be transmitted to the rear wheels 10 via the speed change mechanism 27 and the like, so that the vehicle 1 can travel.

  The water pump 48 and the fan 51 rotate in conjunction with the crankshaft 33. The water pump 48 sucks the cooling water 44 in the radiator 46 through the first cooling water tube 74, and passes the second cooling water tube 75 to the lower part of the water jacket 47 in the cylinder 34 to cool the cooling water 44. Supply. The cooling water 44 that has flowed toward the upper portion of the water jacket 47 is returned to the radiator 46 through the thermostat 77 and the third cooling water tube 76.

  In the radiator 46, the cooling water 44 is caused to flow downward through the water pipes 60 of the core 58 so as to go from the upper tank 56 to the lower tank 57. At this time, the fan 51 sucks the air B outside the radiator 46, and the air B passes through the fins 61 of the core 58 to cool the cooling water 44 in the water pipes 60. The cooled cooling water 44 is then supplied to the water pump 48, the first cooling water tube 74. The second cooling water tube 75 supplies the water jacket 47 with the cylinder 34 again, and the cylinder 34 is cooled.

  According to the above configuration, the pivot shaft 8 is disposed above a midway portion of the radiator 46 in the front-rear direction in the side view of the vehicle body 2 (FIGS. 1 and 2). The entire first to third cooling water tubes 74 to 76 are arranged.

  Therefore, the pivot shaft 8 that is a component of the vehicle 1 and the first to third cooling water tubes 74 to 76 are arranged in a front-and-rear direction, and thus the pivot shaft 8 and the first to the first shafts are arranged. When the three cooling water tubes 74-76 are assembled, maintained, and inspected, these 8, 74-76 are prevented from interfering with each other, and these operations can be facilitated.

Further, as described above, the respective connecting portions of the plurality of coolant tubes 74, 76 to the radiator 46 are allowed to position the front end portion of the radiator 46.

For this reason, the pivot shaft 8 which is a component of the vehicle 1 and each of the cooling water tubes 74 and 76 are more clearly arranged in the front-rear direction. Therefore, the pivot shaft 8 and each of the cooling water tubes are arranged. 74 and 76, it is possible to more reliably prevent them from interfering with each other when the assembly, maintenance, and inspection operations are performed.

  Further, as described above, the internal combustion engine 28 can rotate about the crankcase 31 pivotally supported on the vehicle body 2 by the pivot shaft 8 and the axis 32 extending in the width direction of the vehicle body 2. A crankshaft 33 supported by the case 31 and a cylinder 34 projecting forward from the crankcase 31 and having the water jacket 47 are provided, and the pivot shaft 8 is disposed above the crankshaft 33. .

  Here, the vertical width of the cylinder 34 is generally shorter than that of the crankcase 31, and the pivot shaft 8 is disposed above the crankshaft 33 so as to form the crankshaft. The crankcase 31 of the case 31 and the cylinder 34 is pivotally supported. Therefore, an excess space can be secured above the crankcase 31 and the cylinder 34 between the projecting end of the cylinder 34 and the pivot shaft 8, and fuel can be supplied to the cylinder 34 in this space. A fuel supply device 38 that can be supplied is arranged.

  Therefore, the pivot shaft 8, the crankcase 31, the cylinder 34, and the fuel supply device 38 are arranged in a compact manner. Further, since the fuel supply device 38 can be disposed immediately above the cylinder 34 and is disposed close to the cylinder 34, the fuel supply device 38 starts from the time when the fuel supply device 38 supplies fuel to the cylinder 34 of the internal combustion engine 28. Based on this combustion, the response at the time when the crankshaft 33 of the internal combustion engine 28 outputs the driving force is improved.

  As described above, since the pivot shaft 8 is disposed in the upper region of the crankshaft 33, the swing dimension of the crankcase 31 when the internal combustion engine 28 swings around the pivot shaft 8 is as follows. Compared to the case where the pivot shaft 8 is far away from the crankshaft 33 in the longitudinal direction of the vehicle body 2, the pivot shaft 8 is suppressed to be small.

  Therefore, for example, in the crankcase 31 that does not have the oil pan 35, the oil level fluctuation of the lubricating oil in the crankcase 31 is suppressed to be small, and in the illustrated example, in the oil pan 35 attached to the lower surface of the crankcase 31. The oil level fluctuation of the lubricating oil is suppressed to be small, and therefore, an appropriate amount of the lubricating oil is more reliably supplied to each lubricated portion, and the lubrication is more reliably achieved.

  Further, as described above, the rear portion of the drive unit 24 is displaced to one side of the rear wheel 10, and is positioned below the virtual extension line in the axial direction of the pivot shaft 8 and opens upward. A recess 71 is formed on the upper surface of the radiator 46.

  Therefore, the internal space of the recess 71 can be used as a work space when the pivot shaft 8 is operated by a tool on the axis 19 of the pivot shaft 8, and the radiator 46 becomes an obstacle to this operation. This is prevented.

  Further, as described above, since the concave portion 71 is formed on the upper surface of the radiator 46 so that the radiator 46 does not interfere with the operation of the pivot shaft 8, the portion of the radiator 46 corresponding to the concave portion 71 is formed. Can be positioned higher.

  For this reason, a predetermined vehicle height can be secured on the lower surface of the radiator 46, and therefore, when the vehicle 1 is banked during traveling, the lower end portion of the radiator 46 is prevented from contacting the road surface 25, An “effect” that the bank angle of the vehicle 1 can be made sufficiently large occurs.

  Here, as described above, since the rear portion of the drive unit 24 is offset outwardly from the rear wheel 10, the radiator 46 constituting the rear portion of the drive unit 24 corresponds to the width dimension of the rear wheel 10. Therefore, the vehicle body 2 tends to be greatly displaced outward from the center 23 of the vehicle body 2. For this reason, when the vehicle 1 is banked during traveling, the lower end of the radiator 46 is more likely to come into contact with the road surface 25, and the bank angle may be further narrowed.

  Therefore, as described above, the concave portion 71 is formed on the upper surface of the radiator 46 so that the radiator 46 is positioned higher. Therefore, the “effect” is the effect of the swinging drive unit 24 described above. This is particularly beneficial for a vehicle 1 having

  Further, as described above, when the front and rear wheels 5 and 10 are grounded to the horizontal road surface 25 and the vehicle 1 is brought into the “running posture”, the inner bottom surface 69 of the radiator 46 extends rearwardly upward. In the saddle riding type vehicle, a drainage port 65 that allows the cooling water 44 to be discharged from the inside of the radiator 46 is formed at a rear lower end portion of the radiator 46, and an opening / closing lid 66 that closes the drainage port 65 so as to be opened and closed is provided. It is provided.

  That is, the opening / closing lid 66 is provided at the rear lower end portion of the radiator 46 with the inner bottom surface 69 extending rearward, so that the opening / closing lid 66 is provided on the front side of the radiator 46. And higher.

  Therefore, a predetermined vehicle height can be secured on the lower surface of the opening / closing lid 66. Therefore, when the vehicle 1 is banked during traveling, the lower end portion of the opening / closing lid 66 is prevented from contacting the road surface 25, and the bank angle of the vehicle 1 can be made sufficiently large.

  In addition, as described above, when the stand 15 provided in the vehicle body 2 and the front wheel 5 are grounded to the horizontal road surface 25 to bring the vehicle 1 into the “self-supporting posture”, the ceiling surface 68 of the radiator 46 and At least one of the inner bottom surfaces 69 extends substantially horizontally.

  For this reason, when the vehicle 1 is brought into the “self-supporting posture” in order to perform maintenance and inspection on the components of the vehicle 1, when the ceiling surface 68 extends substantially horizontally as described above, the radiator If the water supply port 62 formed at the upper end of 46 is opened and the cooling water 44 is replenished, no matter whether the water supply port 62 is formed in the longitudinal direction at the upper end of the radiator 46, the air in the radiator 46 Almost the entire amount is discharged to the outside, and the cooling water 44 is filled in the radiator 46. Therefore, the cooling of the cooling water 44 by the radiator 46 is prevented from being hindered by the residual air in the radiator 46.

  On the other hand, when the inner bottom surface 69 extends substantially horizontally as described above, if the drainage port 65 formed at the lower end of the radiator 46 is opened, substantially the entire amount of the cooling water 44 in the radiator 46 is externally generated. To be discharged. Therefore, operations such as replacement of the cooling water 44 can be performed quickly and easily.

  Further, as described above, the front end of the central portion in the vertical direction of the core 58 of the radiator 46 is positioned substantially at the same position as the front end of the rotation locus 86 of the blades 85 of the fan 51 in the longitudinal direction of the vehicle body 2, or The rear end of the central portion in the vertical direction of the core 58 is positioned forward of the front end of the rotation locus 86 and the rear end of the rotation locus 86 of the blades 85 of the fan 51 in the longitudinal direction of the vehicle body 2. It is located at substantially the same place, or is located behind the rear end of the rotation locus 86.

  For this reason, since the fan 51 faces the core 58 of the radiator 46 in the axial direction of the fan 51 over the entire longitudinal direction of the vehicle body 2, the fan 51 is sufficient for the core 58 of the radiator 46. Air B is supplied, and the cooling water 44 is sufficiently cooled by the radiator 46, and the high temperature of the internal combustion engine 28 is more reliably prevented by the cooling water 44.

  Further, as described above, the front end of the central portion in the vertical direction of the core 58 of the radiator 46 is positioned substantially at the same position as the front end of the rotation locus 86 of the blades 85 of the fan 51 in the longitudinal direction of the vehicle body 2, or The rear end of the central portion of the core 58 in the vertical direction is positioned in front of the front end of the rotation locus 86 and is substantially the same as the rear end of the rotation locus 86 of the blades 85 of the fan 51 in the longitudinal direction of the vehicle body 2. Since the radiator 46 is positioned at the same place or positioned behind the rear end of the rotation locus 86, the shape of the radiator 46 tends to increase in the longitudinal direction of the vehicle body 2, but the vertical dimension can be suppressed to be small. Thus, a predetermined vehicle height can be secured on the lower surface of the radiator 46. Therefore, it is prevented that the lower end portion of the radiator 46 contacts the road surface 25 when the vehicle 1 is banked during traveling.

  That is, as described above, the high temperature of the internal combustion engine 28 is more reliably prevented, and even in this case, the bank angle of the vehicle 1 can be made sufficiently large.

  Further, as described above, the lower end of the central portion of the core 58 of the radiator 46 in the longitudinal direction of the vehicle body 2 is positioned at substantially the same height as the lower end of the inner peripheral surface 88 of the rotation locus 86 of the blade 85, or The rotation locus 86 is positioned above the lower end of the inner peripheral surface 88.

  Here, as described above, the lower end of the central portion of the core 58 of the radiator 46 in the longitudinal direction of the vehicle body 2 is positioned at substantially the same height as the lower end of the inner peripheral surface 88 of the rotation locus 86 of the blade 85. In this case, at least the lower part of the fan 51 is substantially entirely opposed to the core 58 of the radiator 46 so as to face the axial direction of the fan 51, and sufficient air B is supplied to the core 58. The cooling water 44 is sufficiently cooled, and the high temperature of the internal combustion engine 28 is more reliably prevented by the cooling water 44.

  Further, as described above, the lower end of the central portion in the longitudinal direction of the vehicle body 2 in the core 58 of the radiator 46 is positioned at substantially the same height as the lower end of the inner peripheral surface 88 of the rotation locus 86 of the blade 85, or Since the lower end of the core 58 of the radiator 46 is prevented from becoming unnecessarily low because the lower end of the inner peripheral surface 88 of the rotation locus 86 is positioned above the lower end of the radiator 46, a predetermined vehicle High can be secured. Therefore, it is prevented that the lower end portion of the radiator 46 contacts the road surface 25 when the vehicle 1 is banked during traveling.

  That is, as described above, the temperature of the internal combustion engine 28 can be prevented more reliably, and even in this case, the bank angle of the vehicle 1 can be made sufficiently large.

  Although the above is based on the illustrated example, the vehicle 1 may be a three-wheeled vehicle, a four-wheeled vehicle, or a snowmobile. Further, the fuel supply device 38 may be based on fuel injection supply by a fuel injection valve. The fan 51 may not be coaxial with the crankshaft 33, and may be driven by a separate driving unit.

1 is an overall side view of a vehicle. FIG. 2 is a partially enlarged detail view of FIG. 1. FIG. 2 is a partial plan view of what is shown in FIG. 1. FIG. 4 is a partially enlarged sectional view of FIG. 3. FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. 3.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 3 Car body frame 5 Front wheel 8 Pivot shaft 10 Rear wheel 15 Stand 19 Axis center 20 Bolt 21 Nut 22 Pivot hole 23 Center 24 Drive unit 25 Road surface 28 Internal combustion engine 29 Internal combustion engine body 31 Crankcase 32 Axis center 33 Crankshaft 34 Cylinder 35 Oil pan 38 Fuel supply device 44 Cooling water 45 Water cooling device 46 Radiator 47 Water jacket 48 Water pump 49 Axis 51 Fan 56 Upper tank 57 Lower tank 58 Core 62 Water supply port 63 Cap 65 Drain port 66 Opening / closing lid 68 Ceiling surface 69 Inner bottom surface 71 Concave portion 74 First cooling water tube 75 Second cooling water tube 76 Third cooling water tube A Rotation B Air C Exhaust

Claims (7)

A front wheel supported on the front portion of the vehicle body, a drive unit pivotally supported on the vehicle body by a pivot shaft extending in the width direction of the vehicle body so that the rear side can swing up and down, and the drive unit A rear wheel supported at a rear portion, and the drive unit includes an internal combustion engine for driving and driving, a radiator for cooling the cooling water for cooling the internal combustion engine, and water formed in the radiator and the internal combustion engine. In a straddle-type vehicle provided with a plurality of cooling water tubes that communicate with a jacket,
In the side view of the vehicle body, the pivot shaft is disposed above a middle part in the front-rear direction of the radiator, and the entire cooling water tube is disposed in front of the pivot shaft ,
Each coupling portion of the plurality of coolant tubes onto Symbol radiator is located at the front end of the radiator, that it has arranged in the vertical direction as well as formed to extend in the longitudinal direction of the vehicle body above the connecting portions, respectively the straddle-type vehicle shall be the feature. A crankcase pivotally supported on the vehicle body by the pivot shaft; a crankshaft supported by the crankcase so as to be rotatable about an axis extending in a width direction of the vehicle body; and the crankcase 2. The straddle-type vehicle according to claim 1, further comprising: a cylinder that protrudes forward from the cylinder and having the water jacket, wherein the pivot shaft is disposed in an upper area of the crankshaft. A rear portion of the drive unit is displaced to one side of the rear wheel, and a recess is formed on the upper surface of the radiator that is positioned below a virtual extension line in the axial direction of the pivot shaft and opens upward. The straddle-type vehicle according to claim 1 or 2 , wherein the straddle-type vehicle is provided. In the straddle-type vehicle in which the front and rear wheels are grounded on a horizontal road surface and the vehicle is in a “running posture” so that the inner bottom surface of the radiator extends rearwardly up,
The drainage port that allows discharging the cooling water from the interior of the radiator is formed at the lower end after the radiator, one of claims 1 to 3, characterized in that a closing cover for openably closing the drain outlet The straddle-type vehicle according to any one of the above. When the stand included in the vehicle body and the front wheel are grounded on a horizontal road surface to bring the vehicle into a “self-supporting posture”, at least one of the ceiling surface and the inner bottom surface of the radiator is substantially The straddle-type vehicle according to any one of claims 1 to 4 , wherein the straddle-type vehicle extends horizontally. A straddle type equipped with a fan that can be driven to rotate about an axis extending in the width direction of the vehicle body, and is disposed inward of the radiator in the width direction of the vehicle body, and is capable of supplying external air to the radiator In the vehicle,
The front end of the central portion in the vertical direction of the core of the radiator is positioned substantially the same as the front end of the rotation trajectory of the fan blades in the longitudinal direction of the vehicle body, or is positioned forward of the front end of the rotation trajectory, In addition, the rear end of the central portion of the core in the vertical direction is positioned substantially the same as the rear end of the rotation locus in the longitudinal direction of the vehicle body, or is positioned behind the rear end of the rotation locus. The straddle-type vehicle according to any one of claims 1 to 5 , wherein: A fan that can be driven to rotate about an axis extending in the width direction of the vehicle body and is disposed inward of the radiator in the width direction of the vehicle body, and is capable of supplying external air to the radiator. A plurality of blades arranged in a circumferential direction around the shaft center are provided, and by the rotation of the fan, air outside the radiator passes through the core of the radiator and is sucked into the internal space of the rotation locus of the blades In the saddle riding type vehicle,
The lower end of the central portion of the radiator core in the longitudinal direction of the vehicle body is positioned at substantially the same height as the lower end of the inner peripheral surface of the rotation trajectory of the blade, or higher than the lower end of the inner peripheral surface of the rotation trajectory The straddle-type vehicle according to any one of claims 1 to 6 , wherein the straddle-type vehicle is located in the position.

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