JP4544509B2 - Water cooling device for saddle riding type vehicle and saddle riding type vehicle - Google Patents

Description

  The present invention relates to a water cooling apparatus in a saddle riding type vehicle including a radiator that is deviated to one side from a center in a width direction of a vehicle body and a fan that supplies external air to the radiator. is there.

  Conventionally, there is a water cooling device in the saddle riding type vehicle described in Patent Document 1 below. According to this publication, a traveling drive unit that extends long in the longitudinal direction (front-rear direction) of the vehicle body and whose front side is pivotally supported by the vehicle body so that the rear side thereof can swing up and down, A rear wheel disposed on the center in the width direction and supported on the rear portion of the drive unit is provided. The drive unit includes a travel drive source, a radiator arranged to be deviated to one side from the center in the width direction of the vehicle body, and a shaft extending in the width direction of the vehicle body to cool the cooling water for cooling the drive source. A fan that can be driven to rotate about the center and is disposed inward of the radiator in the width direction of the vehicle body, and is provided with a fan capable of supplying air to the radiator in the width direction of the vehicle body.

  The fan includes a plurality of blades arranged in a circumferential direction around the axis. The rotation of the fan causes air on the outside of the radiator to pass through the core of the radiator and be sucked into the internal space of the rotation locus of the blades, while the air passes between the blades in the radial direction. As a result, the outside air is supplied to the radiator, and the cooling water in the radiator is cooled.

  When the vehicle travels with the driving force output from the driving source, the driving source tends to reach a high temperature due to the output of the driving force. However, since the cooling air is cooled by supplying external air to the radiator by the fan, and the driving source is cooled by the cooling water, the temperature of the driving source is prevented from being increased.

JP 2000-203483 A

  By the way, in order to more surely prevent the high temperature of the drive source accompanying the traveling of the vehicle, it is conceivable to increase the cooling capacity of the cooling water in the radiator by increasing the shape of the radiator. .

  However, as described above, in the saddle-ride type vehicle, the radiator is disposed so as to be deviated to one side from the center in the width direction of the vehicle body. For this reason, if the shape of the radiator is simply increased, when the vehicle is banked during traveling, the lower end of the radiator is likely to come into contact with the road surface, that is, the bank angle may be narrowed.

  The present invention has been made paying attention to the above-described circumstances, and an object of the present invention is to increase the temperature when the vehicle is driven by the drive source and the drive source attempts to increase the temperature. It is to prevent more reliably and to make the bank angle of the vehicle sufficiently large even in this case.

According to the first aspect of the present invention, a driving source 26 for travel supported by the vehicle body 2 and a cooling water 44 for cooling the driving source 26 disposed so as to be displaced from the center 23 in the width direction of the vehicle body 2 to one side. And a radiator 46 that cools the vehicle body 2, and can be rotationally driven about an axis 49 extending in the width direction of the vehicle body 2. The radiator 46 is disposed inward of the radiator 46 in the width direction of the vehicle body 2. A straddle-type vehicle having a centrifugal fan 51 that can be supplied and having a core 58 of the radiator 46 as a whole in a plate shape;
The front end of the center portion in the vertical direction of the core 58 of the radiator 46 is positioned in front of the front end of the rotation locus 86 of the blade 85 of the fan 51 in the longitudinal direction of the vehicle body 2, and the vertical direction of the core 58 The water cooling device in the saddle-ride type vehicle is configured such that the rear end of the central portion is positioned behind the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2.

According to the second aspect of the present invention, there is provided a driving source 26 for driving supported by the vehicle body 2 and a cooling water 44 for cooling the driving source 26 which is disposed to be deviated to one side from the center 23 in the width direction of the vehicle body 2. And a radiator 46 that cools the vehicle body 2, and can be rotationally driven about an axis 49 extending in the width direction of the vehicle body 2. The radiator 46 is disposed inward of the radiator 46 in the width direction of the vehicle body 2. A straddle-type vehicle including a fan 51 that can be supplied and having a core 58 of the radiator 46 as a whole in a plate shape;
The front end of the center 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, and the vertical end of the core 58 This is a water cooling device in a saddle- ride type vehicle in which the rear end of the central portion in the direction is positioned behind the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2.

According to the third aspect of the present invention, there is provided a driving source 26 for driving supported by the vehicle body 2 and a cooling water 44 for cooling the driving source 26 which is disposed so as to be deviated to one side from the center 23 in the width direction of the vehicle body 2. And a radiator 46 that cools the vehicle body 2, and can be rotationally driven about an axis 49 extending in the width direction of the vehicle body 2. The radiator 46 is disposed inward of the radiator 46 in the width direction of the vehicle body 2. A straddle-type vehicle including a fan 51 that can be supplied and having a core 58 of the radiator 46 as a whole in a plate shape;
The front end of the center portion in the vertical direction of the core 58 of the radiator 46 is positioned in front of the front end of the rotation locus 86 of the blade 85 of the fan 51 in the longitudinal direction of the vehicle body 2, and the vertical direction of the core 58 Is a water cooling device in a saddle- ride type vehicle in which the rear end of the central portion is positioned at substantially the same position as the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2.

According to a fourth aspect of the present invention, there is provided a driving source 26 for driving supported by the vehicle body 2 and a cooling water 44 for cooling the driving source 26 which is disposed to be shifted to one side from the center 23 in the width direction of the vehicle body 2. And a radiator 46 that cools the vehicle body 2, and can be rotationally driven around an axis 49 extending in the width direction of the vehicle body 2. The radiator 46 is disposed inward of the radiator 46 in the width direction of the vehicle body 2. And a fan 51 capable of supplying B, and the core 58 of the radiator 46 has a plate shape as a whole, while the fan 51 includes a plurality of blades 85 arranged in a circumferential direction around the axis 49. By the rotation of the fan 51, the air B outside the radiator 46 in the width direction of the vehicle body 2 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. In the water cooler of the straddle-type vehicle was,
The upper 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 upper end of the rotation locus 86 of the blade 85, and the vehicle body 2 of the core 58 of the radiator 46 is This is a water cooling device in a saddle-ride type vehicle in which the lower end of the central portion in the longitudinal direction 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.

The invention of claim 5 has a configuration after “in” in claim 4 above.
The upper 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 upper end of the rotation locus 86 of the blade 85, and the vehicle body 2 of the core 58 of the radiator 46 is This is a water cooling device in a saddle-ride type vehicle in which the lower end of the central portion in the longitudinal direction is positioned above the lower end of the inner peripheral surface 88 of the rotation locus 86 of the blade 85.

A sixth aspect of the present invention is the water cooling device according to any one of the second to fifth aspects, wherein the fan 51 is a centrifugal fan.

A seventh aspect of the invention includes the water cooling device for a saddle-ride type vehicle according to any one of the second to sixth aspects, wherein the front side is pivotally supported by 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 is offset from the travel drive source 26 and the rear wheel 10 to one side. This is a straddle-type vehicle including the radiator 46 disposed at a position.

  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 of claim 1 includes a travel drive source supported by a vehicle body, a radiator arranged to be displaced to one side from the center in the width direction of the vehicle body and cooling the coolant for cooling the drive source, A centrifugal fan capable of being driven to rotate about an axis extending in the width direction of the vehicle body, disposed inward of the radiator in the width direction of the vehicle body, and capable of supplying air to the radiator; In a saddle-ride type vehicle in which the core of the radiator is plate-shaped as a whole,
The front end of the central portion in the vertical direction of the core of the radiator is positioned forward of the front end of the rotation locus of the fan blades in the longitudinal direction of the vehicle body, and the rear end of the central portion of the core in the vertical direction in the core Is positioned behind the rear end of the rotation locus in the longitudinal direction of the vehicle body.

  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 driving source is more reliably prevented by this cooling water.

  Further, as described above, the front end of the central portion of the radiator core in the vertical direction is positioned in front of the front end of the rotation trajectory of the fan blades in the longitudinal direction of the vehicle body, and in the vertical direction of the core. Since the rear end of the central portion of the radiator is positioned behind the rear end of the rotation locus in the longitudinal direction of the vehicle body, the shape of the radiator is larger than the diameter of the rotation locus of the blades in the longitudinal direction of the vehicle body. Since the size in the vertical direction can be reduced, 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.

  That is, as described above, it is possible to more reliably prevent the drive source from being heated at high temperatures, and even in this case, the bank angle of the vehicle can be made sufficiently large.

The invention according to claim 2 is a driving source that is supported by the vehicle body, a radiator that is disposed to be displaced from one side of the center of the vehicle body in the width direction and cools the cooling water for cooling the driving source, A core of the radiator, comprising: a fan capable of being driven to rotate about an axis extending in the width direction of the vehicle body, disposed inward of the radiator in the width direction of the vehicle body, and capable of supplying air to the radiator; In a saddle-ride type vehicle having a plate shape as a whole,
The front end of the center portion of the radiator core in the vertical direction is positioned substantially at the same position as the front end of the rotation path of the fan blades in the longitudinal direction of the vehicle body, and the rear end of the center portion of the core in the vertical direction of the core The end is located behind the rear end of the rotation locus in the longitudinal direction of the vehicle body.

For this reason, the effect similar to the effect described in Paragraph Nos. [0019] to [0021] as the invention of claim 1 is produced.

The invention according to claim 3 is a travel drive source supported by the vehicle body, a radiator that is arranged to be deviated to one side from the center in the width direction of the vehicle body and cools the cooling water for cooling the drive source, A core of the radiator, comprising: a fan capable of being driven to rotate about an axis extending in the width direction of the vehicle body, disposed inward of the radiator in the width direction of the vehicle body, and capable of supplying air to the radiator; In a saddle-ride type vehicle having a plate shape as a whole,
The front end of the central portion in the vertical direction of the core of the radiator is positioned forward of the front end of the rotation locus of the fan blades in the longitudinal direction of the vehicle body, and the rear end of the central portion of the core in the vertical direction in the core Is positioned at substantially the same position as the rear end of the rotation locus in the longitudinal direction of the vehicle body.

For this reason, the effect similar to the effect described in Paragraph Nos. [0019] to [0021] as the invention of claim 1 is produced.

According to a fourth aspect of the present invention, there is provided a drive source for travel supported by a vehicle body, a radiator that is arranged to be displaced from one side of the width direction of the vehicle body and cools the coolant for cooling the drive source, 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; The fan has a plate shape as a whole, and the fan includes a plurality of blades arranged in a circumferential direction around the shaft center, and the rotation of the fan causes air on the outside of the radiator in the width direction of the vehicle body. In a water cooling device in a saddle-ride type vehicle that passes through the core of the radiator and is sucked into the internal space of the rotation trajectory of the blades,
The upper 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 upper end of the rotation locus of the blade, and 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.

  Here, as described above, the upper 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 upper end of the rotation trajectory of the blades, and the longitudinal length of the vehicle body in the core of the radiator is set. The lower end of the central portion in the direction is positioned at substantially the same height as the lower end of the inner peripheral surface of the rotation locus of the blade, so that almost the whole of the fan is in the axial direction of the fan with respect to the core of the radiator In this case, sufficient air is supplied to the core, and the cooling water is sufficiently cooled by the radiator, so that the temperature of the drive source can be prevented from being raised more reliably by the cooling water.

  In addition, 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 trajectory of the blades. The lower end 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.

  That is, as described above, it is possible to more reliably prevent the drive source from becoming hot, and even in this case, the vehicle bank angle can be made sufficiently large.

The invention of claim 5 has a configuration after “in” in claim 4 above.
The upper 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 upper end of the rotation locus of the blade, and the lower end of the central portion of the radiator core in the longitudinal direction of the vehicle body Is positioned above the lower end of the inner peripheral surface of the rotation locus of the blade.

  For this reason, 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.

  The water cooling device for a saddle riding type vehicle according to the present invention relates to a water cooling device for driving a driving source, and when the driving source tries to increase the temperature of the driving source, this increase in temperature is more reliably prevented and thus Even in this case, the best mode for carrying out the present invention is as follows in order to realize the object of making the bank angle of the vehicle sufficiently large.

That is, a straddle-type vehicle includes a travel drive source that is supported by a vehicle body, a radiator that is disposed to be shifted to one side from the center in the width direction of the vehicle body, and cools the coolant for cooling the drive source. A centrifugal fan that can be driven to rotate about an axis extending in the width direction of the vehicle body, is disposed inward of the radiator in the width direction of the vehicle body, and is capable of supplying air to the radiator, The core of the radiator is formed into a plate shape as a whole.

  The front end of the center portion of the radiator core in the vertical direction is positioned in front of the front end of the rotation path of the fan blades in the longitudinal direction of the vehicle body, and the rear end of the center portion of the core in the vertical direction of the core The end is positioned behind the rear end of the rotation locus in the longitudinal direction of the vehicle body.

  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. It is composed.

  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 that interlocks and connects the rear wheel 10 to the drive source 26. ing. 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 and the rear wheel 10 to the one side (right side) so that the cooling water 44 can be cooled by the external air B. A radiator 46 that rotates, a water pump 47 that circulates cooling water 44 between the water jacket 47 and the radiator 46 formed in the cylinder 34, and a rotation A drive about an axis 49 that extends in the width direction of the vehicle body 2. The centrifugal fan 51 that is disposed inward of the radiator 46 in the width direction of the vehicle body 2 and is capable of supplying external air B to the radiator 46, and the radiator 46 and the fan 51 are connected to the vehicle body 2. The radiator 46 and the fan 51 are covered from the front, rear, top, and bottom, and fixed to the radiator 46 by a fastener 52. And a fat made cover member 53, the 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 third cooling water tube 76 is entirely disposed in front of the pivot shaft 8.

  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. Further, 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 blade 85 of the fan 51 in the longitudinal direction of the vehicle body 2. The rear end of the central portion of the core 58 in the vertical direction is positioned substantially at the same position as the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2.

  The upper end of the center 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 upper end 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. Further, the lower end of the central portion of the core 58 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.

  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 front end of the central portion in the vertical direction of the core 58 of the radiator 46 is positioned forward of the front end of the rotation locus 86 of the blade 85 of the fan 51 in the longitudinal direction of the vehicle body 2, and The rear end of the central portion of the core 58 in the vertical direction is positioned behind the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2. Alternatively, 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 in the longitudinal direction of the vehicle body 2 so as to change a partial configuration in this configuration, Alternatively, the rear end of the central portion of the core 58 in the vertical direction is positioned substantially at the same position as the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2.

  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 cooling water 44 prevents the drive source 26 from being heated to a higher temperature.

  Further, as described above, the front end of the center portion in the vertical direction of the core 58 of the radiator 46 is positioned in front of the front end of the rotation locus 86 of the blade 85 of the fan 51 in the longitudinal direction of the vehicle body 2, and The rear end of the central portion of the core 58 in the vertical direction is positioned behind the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2. Alternatively, 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 in the longitudinal direction of the vehicle body 2 so as to change a partial configuration in this configuration, Alternatively, since the rear end of the central portion of the core 58 in the vertical direction is positioned substantially at the same position as the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2, the shape of the radiator 46 is the longitudinal direction of the vehicle body 2. In the direction, the diameter becomes larger than the diameter of the rotation trajectory 86 of the blade 85, but the size in the vertical direction can be suppressed to be small, so that 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, an increase in the temperature of the drive source 26 can be prevented more reliably, and even in this case, the “effect” that the bank angle of the vehicle 1 can be made sufficiently large is produced.

  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 drive source 26 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 drive source 26 can be prevented more reliably, and even in this case, the bank angle of the vehicle 1 can be made sufficiently large.

  Here, as described above, the radiator 46 is displaced outward from the rear wheel 10. In this case, the radiator 46 is moved outward from the rear wheel 10 because the rear wheel 10 has a larger width dimension. It tends to shift greatly. 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 front end of the central portion in the vertical direction of the core 58 of the radiator 46 is positioned in front of 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, and The rear end of the central portion of the core 58 in the vertical direction is positioned behind the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2. Alternatively, 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 in the longitudinal direction of the vehicle body 2 so as to change a partial configuration in this configuration, Alternatively, the rear end of the central portion of the core 58 in the vertical direction is positioned substantially at the same position as the rear end of the rotation locus 86 in the longitudinal direction of the vehicle body 2. However, this “effect” is particularly beneficial for the vehicle 1 having the above-described swinging drive unit 24.

  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 rear arm 9 and the drive unit 24 may be separate. Further, the fuel supply device 38 may be based on fuel injection supply by a fuel injection valve. The drive source 26 may be an electric motor. 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.

1 vehicle 2 vehicle body 3 vehicle body frame 5 front wheel 8 pivot shaft 9 rear arm 10 rear wheel 15 stand 19 shaft center 23 center 24 drive unit 25 road surface 26 drive source 28 internal combustion engine 29 internal combustion engine body 31 crankcase 32 shaft center 33 crankshaft 34 Cylinder 35 Oil pan 44 Cooling water 45 Water cooling device 46 Radiator 47 Water jacket 48 Water pump 49 Axis 51 Fan 58 Core 84 Rotating plate 85 Blade 86 Rotating locus 87 Internal space 88 Inner surface A Rotating B Air C Exhaust

Claims (7)

A travel drive source supported by the vehicle body, a radiator that is deviated to one side from the center in the width direction of the vehicle body, and that cools the coolant for cooling the drive source, and extends in the width direction of the vehicle body A centrifugal fan that can be driven to rotate about an axis and is disposed inward of the radiator in the width direction of the vehicle body, and is capable of supplying air to the radiator. In a saddle-ride type vehicle,
The front end of the central portion in the vertical direction of the core of the radiator is positioned forward of the front end of the rotation locus of the fan blades in the longitudinal direction of the vehicle body, and the rear end of the central portion of the core in the vertical direction in the core A water cooling device for a saddle-ride type vehicle, characterized in that is positioned rearward of the rear end of the rotation locus in the longitudinal direction of the vehicle body. A travel drive source supported by the vehicle body, a radiator that is deviated to one side from the center in the width direction of the vehicle body, and that cools the coolant for cooling the drive source, and extends in the width direction of the vehicle body A fan that can be driven to rotate about an axis and is disposed inward of the radiator in the width direction of the vehicle body, and is provided with a fan that can supply air to the radiator. The core of the radiator has a plate shape as a whole. In a saddle-ride type vehicle,
The front end of the center portion of the radiator core in the vertical direction is positioned substantially at the same position as the front end of the rotation path of the fan blades in the longitudinal direction of the vehicle body, and the rear end of the center portion of the core in the vertical direction of the core A water cooling device for a saddle riding type vehicle, characterized in that an end is positioned rearward of a rear end of the rotation locus in the longitudinal direction of the vehicle body. A travel drive source supported by the vehicle body, a radiator that is deviated to one side from the center in the width direction of the vehicle body, and that cools the coolant for cooling the drive source, and extends in the width direction of the vehicle body A fan that can be driven to rotate about an axis and is disposed inward of the radiator in the width direction of the vehicle body, and is provided with a fan that can supply air to the radiator. The core of the radiator has a plate shape as a whole. In a saddle-ride type vehicle,
The front end of the central portion in the vertical direction of the core of the radiator is positioned forward of the front end of the rotation locus of the fan blades in the longitudinal direction of the vehicle body, and the rear end of the central portion of the core in the vertical direction in the core A water cooling device for a saddle-ride type vehicle, characterized in that is positioned substantially at the same position as the rear end of the rotation locus in the longitudinal direction of the vehicle body. A travel drive source supported by the vehicle body, a radiator that is deviated to one side from the center in the width direction of the vehicle body, and that cools the coolant for cooling the drive source, and extends in the width direction of the vehicle body A fan that can be driven to rotate about an axis and is disposed inward of the radiator in the width direction of the vehicle body, and is provided with a fan that can supply external air to the radiator. The core of the radiator is plate-shaped as a whole. On the other hand, the fan includes a plurality of blades arranged in a circumferential direction around the axis, and the rotation of the fan causes air outside in the width direction of the radiator to pass through the core of the radiator. In the water cooling device in the saddle riding type vehicle that is sucked into the internal space of the rotation trajectory of the blades,
The upper 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 upper end of the rotation locus of the blade, and the lower end of the central portion of the radiator core in the longitudinal direction of the vehicle body The water cooling device in a saddle-ride type vehicle, wherein is positioned at substantially the same height as the lower end of the inner peripheral surface of the rotation locus of the blade. A travel drive source supported by the vehicle body, a radiator that is deviated to one side from the center in the width direction of the vehicle body, and that cools the coolant for cooling the drive source, and extends in the width direction of the vehicle body A fan that can be driven to rotate about an axis and is disposed inward of the radiator in the width direction of the vehicle body, and is provided with a fan that can supply external air to the radiator. The core of the radiator is plate-shaped as a whole. On the other hand, the fan includes a plurality of blades arranged in a circumferential direction around the axis, and the rotation of the fan causes air outside in the width direction of the radiator to pass through the core of the radiator. In the water cooling device in the saddle riding type vehicle that is sucked into the internal space of the rotation trajectory of the blades,
The upper 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 upper end of the rotation locus of the blade, and the lower end of the central portion of the radiator core in the longitudinal direction of the vehicle body A water cooling device for a saddle riding type vehicle, wherein the water cooling device is positioned above a lower end of an inner peripheral surface of a rotation locus of the blade. The water cooling device according to any one of claims 2 to 5, wherein the fan is a centrifugal fan. A driving unit for driving, comprising the water cooling device according to any one of claims 2 to 6, wherein the front side is pivotally supported by the vehicle body so that the rear side can swing up and down, and the rear part of the driving unit And a rear wheel supported by the vehicle, wherein the drive unit includes the driving source for traveling and the radiator disposed so as to be deviated to one side from the rear wheel. Type vehicle.

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