JP2012192858A - Motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve the low center of gravity to improve steering controllability and a foot landing property of a driver during a stop.SOLUTION: The motorcycle is constituted so that an engine unit 8 is mounted to the front half inner side of a vehicle body frame 2 between a front wheel and a rear wheel 5, and a seat 4 is disposed on the vehicle body frame 2 at the vehicle body rear side of the engine unit 8. Between the engine unit 8 and the rear wheel 5, a battery 32 is disposed below the top surface 803 of the engine case 801 of the engine unit 8.

Description

  The present invention relates to a motorcycle, and more particularly to a cruiser type motorcycle in which a muffler is integrated on one side of a vehicle body.

  As a type of motorcycle, a cruiser type (American type) motorcycle is known. In a cruiser type motorcycle, like a general motorcycle, an engine, a fuel tank, electrical parts, an accessory case, and the like are collectively arranged between a front wheel and a rear wheel. In this type of motorcycle, a seat is attached at a position distant from the steering, and a long fuel tank is attached in front of the seat in front and rear of a teardrop type having excellent modeling beauty. With this arrangement configuration, the seat is placed at a low position so as to improve the foot-wearing property in order to take a riding posture in which the arms and legs are extended forward and seated on the seat.

  By the way, in a cruiser type motorcycle, a configuration in which the entire length of the vehicle body is long and the center of gravity of the vehicle body is low is desired. 2. Description of the Related Art Conventionally, a cruiser type motorcycle has been known in which a battery is disposed directly under a seat to lower the center of gravity (see, for example, Patent Document 1). In the motorcycle described in Patent Document 1, an accommodation space capable of accommodating articles is formed adjacent to the lower side of the seat, and a battery is accommodated in the accommodation space. Also, in the accommodation space, an ABS (Antilock Bracket System) hydraulic control unit or the like is disposed in an empty space created by the arrangement of the battery.

JP 2009-179163 A

  However, in the above-described motorcycle, further reduction in the center of gravity is desired, and since the heavy battery is disposed in the accommodation space adjacent to the lower side of the seat, the center of gravity of the vehicle body cannot be sufficiently lowered. . For this reason, it has been difficult to improve steering stability. In addition, since the hydraulic control unit or the like is arranged in an empty space of the accommodation space after the battery is arranged, the accommodation space below the seat is increased in order to arrange both the battery and the hydraulic control unit in the accommodation space. I had to take it. Thereby, in the part adjacent to the lower side of the seat, the side cover that covers the accommodation space protrudes outward, and the driver's legibility at the time of stopping has deteriorated.

  The present invention has been made in view of the above points, and by reducing the center of gravity of a vehicle body, it is possible to improve a steering stability and to improve a driver's footing property when stopped. The purpose is to provide.

  The motorcycle according to the present invention is a motorcycle in which an engine unit is mounted on a front half of a body frame between a front wheel and a rear wheel, and a seat is disposed on an upper portion of the body frame behind the engine unit, A battery is disposed below the upper surface of the engine case of the engine unit between the engine unit and the rear wheel.

  In the motorcycle according to the present invention, the battery is disposed closer to the lower frame between a lower frame of the body frame that is positioned below the engine unit and an upper frame that supports the seat of the body frame. Can be arranged.

  According to these configurations, since the battery, which is a heavy object, is disposed at a low position sufficiently spaced downward from the seat between the engine unit and the rear wheel, the center of gravity of the vehicle body can be lowered, and steering can be achieved. Stability can be improved. In addition, since the battery is disposed sufficiently away from the seat, the portion adjacent to the lower side of the seat can be formed narrow in the vehicle width direction, and the driver's feet can be improved when the vehicle is stopped.

  Further, in the motorcycle according to the present invention, a muffler is disposed so as to be biased to one side in the vehicle width direction with respect to the vehicle body center line extending in the longitudinal direction of the vehicle body, and is biased to the other side in the vehicle width direction with respect to the vehicle body center line. Then, the battery can be arranged. According to this configuration, the battery is arranged with a bias toward the opposite side of the muffler with respect to the vehicle center line, so that the weight balance is evenly or evenly approximated even in a motorcycle in which the weight balance tends to be biased toward the muffler. Can be significantly improved. In addition, needle-keeping property is the performance which maintains a straight-ahead state in a vehicle self-supporting state.

  In the motorcycle according to the present invention, the vehicle body frame includes a swing arm support portion that pivotally supports a rear swing arm that supports the rear wheel so as to be swingable in a vertical direction, and the vehicle body frame is more than the swing arm support portion. The battery can be arranged behind.

  Further, in the motorcycle according to the present invention, a rear cushion unit for buffering and suspending the rear wheel is disposed at the center in the vehicle width direction below the seat, and the battery is adjacent to the rear cushion unit in the vehicle width direction. And a rectifier between the rear cushion unit and the battery. According to this configuration, since the rectifier is arranged on the side facing the rear cushion unit of the battery, the rectifier that becomes high temperature is not covered with other parts, and the rectifier is exposed to the driving wind to prevent the rectifier from The cooling effect can be enhanced.

  In the motorcycle of the present invention, a hydraulic control unit of an anti-lock brake system that prevents the front wheel and the rear wheel from being locked during a braking operation can be disposed below the seat and above the rear cushion unit. . According to this configuration, since the hydraulic control unit can be arranged at a position adjacent to the lower side of the seat where the battery is not arranged, the degree of freedom of arrangement of the hydraulic control unit can be improved.

  In the motorcycle according to the present invention, a propeller shaft that transmits power from the engine unit to the rear wheel is disposed so as to be biased toward the battery in the vehicle width direction with respect to the vehicle body center line, and the swing arm Accordingly, the battery can be disposed below the lower limit position of the swing range of the propeller shaft that swings in the vertical direction. According to this configuration, the propeller shaft is disposed on the opposite side of the muffler with respect to the vehicle body center line so that the weight balance is evenly or evenly even in a motorcycle in which the weight balance tends to be biased to the muffler side. It can be approached and the maintenance of the needle can be greatly improved. Moreover, even if the swing arm swings, the propeller shaft does not interfere with the battery.

  In the motorcycle according to the present invention, the battery can be disposed in the vicinity of the swing center of the propeller shaft. According to this configuration, it is possible to suppress battery interference by the propeller shaft without greatly separating the battery in the vehicle width direction from the propeller shaft.

  According to the present invention, it is possible to improve steering stability by lowering the center of gravity of the vehicle body, improve needle holding performance by making the right and left weight balance of the vehicle closer to each other, and further improve the driver's ability when the vehicle is stopped. It can improve the footing.

1 is a left side view of a motorcycle according to the present embodiment. 1 is a right side view of a motorcycle according to the present embodiment. It is a left side view showing the internal configuration of the motorcycle according to the present embodiment. It is a right side view showing the internal configuration of the motorcycle according to the present embodiment. It is a top view showing an internal configuration of the motorcycle according to the present embodiment. It is the figure which looked at the section near the center frame of the motorcycle concerning this embodiment from the front. It is the figure which looked at the section near the bridge of the motorcycle concerning this embodiment from back. It is a perspective view of the peripheral part of the battery of the motorcycle according to the present embodiment. FIG. 3 is a perspective view of a central portion in the front-rear direction of the motorcycle according to the present embodiment. 1 is a perspective view of a peripheral portion of a hydraulic control unit of a motorcycle according to the present embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a cruiser type motorcycle in which a muffler is integrated on one side of the vehicle body will be described as an example of the motorcycle of the present invention. However, the motorcycle of the present invention is not limited to this, and can be changed as appropriate.

  With reference to FIG.1 and FIG.2, schematic structure of the whole motorcycle 1 which concerns on this Embodiment is demonstrated. FIG. 1 is a left side view of a motorcycle 1 according to the present embodiment. FIG. 2 is a right side view of the motorcycle 1 according to the present embodiment. In the following drawings, the front of the vehicle is indicated by an arrow FR, the rear of the vehicle is indicated by an arrow RE, the left side of the vehicle is indicated by an arrow LE, and the right side of the vehicle is indicated by an arrow RI.

  As shown in FIGS. 1 and 2, the motorcycle 1 includes a double cradle-type body frame 2 on which components such as a power unit and an electrical system are mounted. The engine unit 8 is mounted on the inner side of the main frame portion 201 that is the first half of the body frame 2 in a side view, and a teardrop type fuel tank 3 is disposed above the engine unit 8 on the main frame portion 201. Be placed. Behind the fuel tank 3, the seat 4 is disposed above the seat frame portion 202, which is the latter half of the vehicle body frame 2. A rear fender 11 that covers the upper half of the rear wheel 5 is disposed behind the seat 4, and a passenger seat 12 is disposed on the rear fender 11.

  A pair of front forks 13 is supported at the front portion of the vehicle body frame 2 so as to be swingable left and right via a steering shaft (not shown) provided on a head pipe 211 described later. A handle bar 14 is fixed to the upper part of the pair of front forks 13. A clutch lever 15 is provided on the handlebar 14 on the left side of the vehicle body, and a brake lever 16 for the front wheel 6 is provided on the handlebar 14 on the right side of the vehicle body. A front fender 17 is disposed below the pair of front forks 13 so as to rotatably support the front wheel 6 and cover the upper half of the front wheel 6. The front wheel 6 is provided with a hydraulic disc brake device (not shown). A radiator 39 is provided below the head pipe 211 in front of the engine unit 8.

  A rear swing arm 7 is supported at the rear portion of the vehicle body frame 2 so as to be swingable in the vertical direction. A rear wheel 5 is rotatably supported at the rear part of the rear swing arm 7. Near the base end side of the rear swing arm 7, a rear cushion unit 9 (see FIG. 4) as a rear wheel suspension device is disposed at an intermediate position in the vehicle width direction. The rear cushion unit 9 includes a coil spring, a shock absorber, and the like. The rear wheel 5 is provided with a hydraulic disc brake device (not shown).

  The engine unit 8 is composed of a V-type two-cylinder engine and a transmission, and is supported via an engine mount on a main frame portion 201 that surrounds the periphery in a side view. The engine unit 8 is a horizontal crank type in which the crankshaft is directed in the vehicle width direction, and a front and rear two-cylinder cylinder 802 is arranged in a V shape in an engine case 801 that houses the crankshaft. Above each cylinder 802 is provided a cylinder head 804 that forms the upper portion of the combustion chamber and incorporates a valve gear.

  An air cleaner 18 is disposed on the right side surface of each cylinder head 804 so as to correspond to the V banks. The air cleaner 18 is connected to an intake air amount control device (in this embodiment, a carburetor), and is connected to the cylinder head 804 via an intake pipe. In the engine unit 8, air is taken into the carburetor from the air cleaner 18, and air and fuel are premixed by the carburetor and supplied to the combustion chamber. In the case of the fuel injection type, the intake air amount control device may be constituted by a throttle body.

  Each cylinder head 804 is connected to a pair of exhaust pipes 19 a and 19 b that are collectively arranged on the right side of the engine unit 8. The exhaust pipes 19a and 19b extend from the front and rear positions sandwiching the air cleaner 18 toward the rear of the vehicle body, and mufflers 21a and 21b are attached to the rear ends. The mufflers 21 a and 21 b are arranged side by side on the right side of the rear wheel 5. The exhaust gas after combustion in the engine is exhausted to the outside through the exhaust pipes 19a and 19b and the mufflers 21a and 21b.

  A transmission is housed inside the engine case 801. The driving force changed by the transmission is transmitted to the rear wheel 5 via a propeller shaft (not shown) extending in the longitudinal direction of the vehicle body. The propeller shaft converts the power transmission direction into an orthogonal direction by bevel gear sets provided on the front end side and the rear end side, respectively. Thus, in the present embodiment, the driving force from the engine unit 8 is transmitted to the rear wheel 5 by the shaft drive system.

  A footrest 22 is arranged below the engine unit 8 and in front of the vehicle body of the seat 4. For this reason, when the driver sits on the seat 4 and puts his / her foot on the footrest 22, the riding posture is such that his arms and legs are extended forward. Therefore, in the cruiser type motorcycle 1 according to the present embodiment, the seat 4 is attached at a low position in consideration of the ability of the driver to get on the road surface. A shift pedal 23 is provided on the base end side of the footrest 22 on the left side of the vehicle body, and a brake pedal 24 for the rear wheel 5 is provided on the base end side of the footrest 22 on the right side of the vehicle body.

  In the motorcycle 1, the lower side of the seat 4 is covered with a side upper cover 25, a side lower cover 26, and a side rear cover 27. In the accommodation space covered with the side upper cover 25, the hydraulic control unit 31 (see FIG. 10) of the ABS device is accommodated in the accommodation space together with the electrical components such as the fuse 45. In addition, a battery 32 that supplies electricity to each part of the motorcycle 1 is disposed in the accommodation space covered with the side lower cover 26 below the side upper cover 25.

  Hereinafter, the positional relationship of the battery 32 with respect to each part of the motorcycle 1 which is a characteristic part of the present invention will be described with reference to FIGS. 3 to 8 mainly show a peripheral portion of the battery 32, and for convenience of explanation, some parts are omitted. FIG. 3 is a left side view showing the internal configuration of the motorcycle 1 according to the present embodiment. FIG. 4 is a right side view showing the internal configuration of the motorcycle 1 according to the present embodiment. Some components of the vehicle body frame 2 (the right seat rail 221, the rear portion of the right down frame 213, the right swing arm bracket 217). FIG. 6 is a view showing a state in which the right support bracket 222 and the right reinforcing member 224) are removed. FIG. 5 is a top view showing the internal configuration of the motorcycle 1 according to the present embodiment. FIG. 6 is a view of a cross section near the center frame 219 of the motorcycle 1 according to the present embodiment as viewed from the front. FIG. 7 is a rear view of a cross section near the bridge 223 of the motorcycle 1 according to the present embodiment. FIG. 8 is a perspective view of a peripheral portion of battery 32 of motorcycle 1 according to the present embodiment.

  As shown in FIGS. 3 to 8, the main frame portion 201, which is the first half of the vehicle body frame 2, includes a head pipe 211, a pair of left and right tank rails 212 extending from the head pipe 211 to the rear of the vehicle body, and a lower portion from the head pipe 211. And a pair of left and right down frames 213 extending in the horizontal direction. The pair of tank rails 212 extends rearward and obliquely downward from the head pipe 211 so as to pass above the engine unit 8. The pair of tank rails 212 extends from the head pipe 211 toward the rear of the vehicle body to the left and right, and extends so as to gradually approach from the middle. The fuel tank 3 is installed on top of the pair of tank rails 212 so as to straddle.

  The pair of down frames 213 extends downward from the head pipe 211 and then extends substantially horizontally toward the rear so as to pass under the engine unit 8. The pair of down frames 213 is provided with an engine mount 214 a that supports the front portion of the engine unit 8. The upper end sides of the pair of down frames 213 and the front end sides of the pair of tank rails 212 are connected by a reinforcing bridge 215, respectively. The pair of down frames 213 are connected at three locations of the horizontal portion 225 by reinforcing bridges 216a to 216c extending in the vehicle width direction.

  The main frame portion 201 has a pair of left and right swing arm brackets (swing arm support portions) 217 extending upward from a bridge 216b that connects the pair of down frames 213. The pair of swing arm brackets 217 is formed with a pivot center portion 218 that supports the front end portion of the rear swing arm 7 in a swingable manner. The pair of swing arm brackets 217 are provided with engine mounts 214b and 214c that support the rear portion of the engine unit 8. The upper end portions of the swing arm bracket 217 are connected to each other, and this connecting portion is connected to the pair of tank rails 212 via the center frame 219.

  The seat frame portion 202 that is the rear half of the body frame 2 includes a pair of left and right seat rails 221 extending rearward from the rear end portions of the pair of tank rails 212 and a swing arm bracket 217 extending from the rear end portion of the seat rail 221. And a support bracket 222 extending to the pivot center 218. A pair of left and right reinforcing members 224 (see FIGS. 7 and 8) that connect and reinforce the middle part of the support bracket 222 and the rear part of the down frame 213 are attached to the support bracket 222, and the side of the support bracket 222 covers the outside of the support bracket 222. A rear cover 27 is attached. The pair of seat rails 221 extends obliquely rearward from the rear end portions of the pair of tank rails 212 while spreading left and right toward the rear of the vehicle body. The rear end portions of the pair of seat rails 221 are connected by a reinforcing bridge 223 extending in the vehicle width direction. The seat 4 is installed above the pair of seat rails 221 and the bridge 223.

  The rear swing arm 7 is supported with respect to the vehicle body frame 2 so as to be swingable about a pivot center portion 218 of the pair of swing arm brackets 217. The rear swing arm 7 has a plate-like portion 301 extending up and down so as to partition the vehicle body frame 2 and the rear wheel 5, and a one-side extension extending forward from the right end of the intermediate position of the plate-like portion 301. Arm 308 of the book. The front end portion of the arm portion 308 is pivotally supported by the pivot center portion 218 so as to be swingable. On the left side of the plate-shaped portion 301 in the vehicle width direction, an upper pipe 302 extending rearward from the upper portion of the plate-shaped portion 301, a lower pipe 303 extending rearward from the lower portion of the plate-shaped portion 301, and a left side of an intermediate position of the plate-shaped portion 301. A center pipe 304 extending in the front-rear direction from the end is provided. The rear ends of the upper pipe 302, the lower pipe 303, and the center pipe 304 are connected to a final gear case 305, and the front end of the center pipe 304 is pivotally supported by the pivot center portion 218.

  The center pipe 304 connects the engine case 801 and the final gear case 305, and accommodates a propeller shaft (not shown) therein. One end of the propeller shaft is connected to the transmission in the engine case 801 and the other end is connected to the drive gear in the final gear case 305. On the right side of the plate-like portion 301 in the vehicle width direction, an upper pipe 306 extending rearward from the upper portion of the plate-like portion 301 and a lower pipe 307 extending rearward from the lower portion of the plate-like portion 301 are provided. The rear end portions of the upper pipe 306 and the lower pipe 307 on the right side of the vehicle body are connected to each other, and the rear wheel 5 is rotatably supported together with the rear end portions of the upper pipe 302, the lower pipe 303, and the center pipe 304 on the left side of the vehicle body.

  Here, the arrangement configuration of the battery 32 in the vertical direction of the vehicle body will be described. As shown in FIGS. 3 and 4, the battery 32 is spaced downward from the seat 4 and below the upper surface 803 of the engine case 801 of the engine unit 8 between the engine unit 8 and the rear wheel 5 in a side view. Is arranged. More specifically, the battery 32 is disposed behind the swing arm bracket 217 and above the horizontal portion 225 of the down frame 213 and below the support bracket 222. By placing the heavy battery 32 at this position, the center of gravity of the motorcycle 1 can be lowered, and the steering stability can be improved.

  Here, the upper surface 803 of the engine case 801 indicates the upper surface of the case in which the crankshaft and the transmission are accommodated and the front and rear two-cylinder cylinders 802 are arranged in a V shape. The arrangement of the battery 32 in the vertical direction is not limited to the above configuration, and is close to the down frame 213 between the seat rail 221 as the upper frame and the horizontal portion 225 of the down frame 213 as the lower frame. It suffices if they are arranged. Even with such a battery 32 arrangement, the center of gravity of the motorcycle 1 can be lowered.

  Above the battery 32, a hydraulic control unit 31 of the ABS device is arranged. More specifically, the hydraulic control unit 31 is disposed in the holder 33 attached to the seat frame portion 202 in the accommodation space below the seat 4 and above the rear cushion unit 9. In addition to the hydraulic control unit 31, a fuse 45 is attached to the holder 33. In the present embodiment, since the battery 32 is arranged to be spaced downward from the housing space, the arrangement of the hydraulic control unit 31 is not limited by the battery 32, and the degree of freedom in arrangement of the hydraulic control unit 31 is improved. Is done. In addition, a space for arranging auxiliary machine parts other than the hydraulic control unit 31 can be secured in the housing space.

  Further, since the battery 32 and the hydraulic control unit 31 are not arranged in the same accommodation space, the volume of the accommodation space can be reduced and the outward protrusion of the side upper cover 25 can be reduced, and the driver's feet when stopping Can be improved. A reservoir tank 34 for cooling water is disposed in front of the battery 32. The reservoir tank 34 is located on the left side of the engine unit 8 and is connected to a radiator 39 (see FIGS. 1 and 2) via a return hose 35 (see FIG. 9).

  Next, the arrangement configuration of the battery 32 in the vehicle width direction of the vehicle body will be described. In general cruiser type motorcycles, the mufflers are often arranged together on one side in the vehicle width direction, and the left and right weight balance of the vehicle body is biased to the muffler side, so the muffler side is slightly Tend to go naturally. In this case, the driver needs to tilt the vehicle body slightly to the side opposite to the muffler and perform independent or straight traveling. As a result, the motorcycle has a round shape around the front and rear wheels, and has a characteristic of naturally turning to the side where the vehicle body is inclined, that is, the side where the front and rear wheels are inclined, so-called self-steering characteristics. In order to do this, the driver had to intentionally turn the steering to the muffler side. As a result, the motorcycle proceeds in the direction in which the rudder is turned off, resulting in a characteristic with poor needle maintenance.

  Therefore, in the motorcycle according to the present embodiment, battery 32 is arranged on the side opposite to the mufflers 21a, 21b side in the vehicle width direction. As shown in FIG. 5, in the motorcycle 1, mufflers 21 a and 21 b are arranged on the right side in the vehicle width direction with respect to the vehicle body center line C extending in the vehicle longitudinal direction when viewed from above, and the mufflers 21 a and 21 b are arranged with respect to the vehicle body center line C. Thus, the battery 32 is arranged biased to the left in the vehicle width direction. Accordingly, even in the motorcycle 1 in which the left and right weight balance tends to be biased toward the mufflers 21a and 21b, the left and right weight balance of the vehicle body can be made equal or evenly approached, and the needle-holding performance can be greatly improved.

  The hydraulic control unit 31 is disposed substantially on the vehicle body center line C, and a brake pipe 41-44 is connected to the side opposite to the mufflers 21a and 21b, which are heat sources (see FIG. 10). For this reason, the temperature rise of the brake fluid is suppressed and the occurrence of vapor lock can be suppressed. In addition, since the fluid temperature of the brake fluid is stabilized, the hydraulic control unit 31 can perform appropriate fluid pressure control. In the present embodiment, the hydraulic control unit 31 is disposed substantially on the vehicle body center line C. However, since the degree of freedom of arrangement of the hydraulic control unit 31 is improved, the hydraulic control unit 31 is disposed on the vehicle body center line. It is also possible to displace the battery 32 from the battery 32 side. Thereby, the weight balance of the left and right sides of the vehicle body can be made closer or evenly closer to improve the needle-holding property.

  A storage box 36 is disposed on the left side of the hydraulic control unit 31. The storage opening of the storage box 36 is covered with the side upper cover 25 described above. The storage box 36 can store a vehicle manual, vehicle verification documents, in-vehicle tools, rain gear, and the like.

  Next, the positional relationship between the battery 32, the center pipe 304, and the rear cushion unit 9 will be described. In a shaft drive type motorcycle, a center pipe that accommodates a propeller shaft is provided on a side opposite to the muffler side (left side in the vehicle width direction). For this reason, when the battery is arranged below the support bracket, the center pipe (propeller shaft) may interfere with the battery when the rear swing arm swings in the vertical direction. Therefore, in the motorcycle according to the present embodiment, as shown in FIG. 3, interference between battery 32 and center pipe 304 is avoided by arranging battery 32 in the vicinity of pivot center portion 218 of swing arm bracket 217. ing.

  Since the swing amount of the center pipe 304 is small in the vicinity of the pivot center portion 218, the center pipe 304 may interfere with the battery 32 even if the battery 32 is positioned below the center pipe 304 as shown in FIGS. 6 and 7. Absent. In addition, since it is not necessary to place the battery 32 so as to avoid the center pipe 304, the battery 32 can be separated from the road surface when turning the vehicle body, and the bank angle of the vehicle body can be secured, so that appropriate turning performance can be secured. In this embodiment, the battery 32 is arranged in the vicinity of the pivot center 218. However, the battery 32 is below the lower limit position of the swing range of the center pipe 304, that is, outside the swing range of the center pipe 304. If this is arranged, interference between the center pipe 304 and the battery 32 can be suppressed.

  In the present embodiment, since the propeller shaft in the center pipe 304 is arranged to be biased toward the battery 32 with respect to the vehicle center line C, the left and right weight balance of the vehicle body that tends to be biased toward the mufflers 21a and 21b. Can be maintained more evenly or evenly to improve the needle retention. Furthermore, since the battery 32 is arranged away from the mufflers 21a and 21b, which are heat sources, the battery 32 can be prevented from becoming an extremely high temperature state, and early deterioration of the battery 32 can be prevented.

  As shown in FIGS. 6 to 8, a rear cushion unit 9 for suspending the rear wheel 5 is provided at the center in the vehicle width direction. The battery 32 is adjacent to the rear cushion unit 9 in the vehicle width direction, and a rectifier (regulate rectifier) 37 is provided on the right side surface of the battery holder 38 on the rear cushion unit 9 side. The rectifier 37 is provided with cooling fins to ensure a heat radiation area. In the battery holder 38, the left side surface facing the outside of the vehicle is covered by the side lower cover 26, but the right side surface provided with the rectifier 37 faces the rear cushion unit 9 and is not covered by other components. Therefore, the rectifier 37 of the battery 32 can be exposed to traveling wind to enhance the cooling effect.

  Next, with reference to FIG.9 and FIG.10, the piping structure of the hydraulic control unit 31 of an ABS apparatus is demonstrated. FIG. 9 is a perspective view of a central portion in the front-rear direction of the motorcycle 1 according to the present embodiment. FIG. 10 is a perspective view of a peripheral portion of the hydraulic control unit 31 of the motorcycle 1 according to the present embodiment.

  The ABS hydraulic control unit 31 detects wheel slip by wheel speed sensors (not shown) provided on the front and rear wheels 5 and 6, adjusts the hydraulic pressure of the disc brake device, and controls the braking force acting on the wheels. ing. More specifically, the hydraulic control unit 31 reduces the hydraulic pressure and decreases the braking force acting on the wheel when the wheel lock is predicted, and increases the hydraulic pressure and acts on the wheel when the wheel lock is released. Increase braking force. The hydraulic control unit 31 includes a hydraulic pump, a motor that drives the hydraulic pump, and an electromagnetic switching valve that switches a hydraulic passage for adjusting hydraulic pressure.

  As shown in FIGS. 9 and 10, the hydraulic control unit 31 is connected with an input pipe 41 for front brake, an output pipe 42 for front brake, an input pipe 43 for rear brake, and an output pipe 44 for rear brake. Has been. The front brake input pipe 41 extends forward from the hydraulic control unit 31 and is connected along the tank rail 212 to the master cylinder of the brake lever 16 on the right side of the vehicle body. The front brake output pipe 42 extends forward from the hydraulic control unit 31 and is connected to the disc brake device of the front wheel 6 along the tank rail 212 and the front fork 13.

  The rear brake input pipe 43 extends downward from the hydraulic control unit 31 and is connected to the master cylinder of the brake pedal 24 on the right side of the vehicle body along the horizontal portion 225 of the down frame 213. The output pipe 44 for the rear brake extends downward from the hydraulic control unit 31 and is connected to the disc brake device of the rear wheel 5 along the upper pipe 302. In this way, the hydraulic pressure generated in each master cylinder is supplied to the wheel cylinders of the disc brake devices of the front and rear wheels 5 and 6 via the hydraulic control unit 31.

  By the way, in the motorcycle, the center of gravity moves forward due to the inertial force at the time of braking, so that there is an event that the rear wheels are easily locked. For this reason, in the ABS device, the response of braking force control particularly to the rear wheels is required. As described above, when the battery is arranged in the accommodation space where the hydraulic control unit is arranged, the hydraulic control unit cannot be arranged close to the rear wheel because of the empty space. Therefore, in the present embodiment, the hydraulic control unit 31 is arranged close to the rear wheel 5 by arranging the battery 32 outside the accommodation space in which the hydraulic control unit 31 is arranged. Thereby, the hydraulic path between the hydraulic control unit 31 and the disc brake device of the rear wheel 5 is shortened, the responsiveness of the braking force control of the rear wheel 5 is improved, and the brake control performance of the ABS device can be improved. it can.

  As described above, according to the motorcycle 1 according to the present embodiment, the heavy battery 32 is disposed at a low position sufficiently spaced downward from the seat 4 between the engine unit 8 and the rear wheel 5. Therefore, the center of gravity of the vehicle body can be lowered, and the steering stability can be improved. In addition, since the battery 32 is not arranged in the accommodation space adjacent to the lower side of the seat 4, the degree of freedom of arrangement of the hydraulic control unit 31 can be improved, and the volume of the accommodation space can be reduced to move the side upper cover 25 outward. Overhang can be reduced. As a result, it is possible to improve the driver's feet when stopping.

  Further, since the battery 32 is arranged so as to be deviated on the opposite side of the mufflers 21a and 21b with respect to the vehicle body center line C, the weight balance can be made equal or evenly close, and the needle-keeping property can be greatly improved. Further, in the present embodiment, the battery 32 and the hydraulic control unit 31 can be appropriately arranged without changing the frame configuration of the existing body frame 2.

  In addition, this invention is not limited to the said embodiment, It can change and implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited to this, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

  For example, in the present embodiment, the mufflers 21a and 21b are grouped on the right side of the vehicle body, but the mufflers 21a and 21b may be grouped on the left side of the vehicle body. In this case, the battery 32 is arranged so as to be biased to the right side of the vehicle body, and the left and right weight balance of the vehicle body is adjusted. In the present embodiment, the battery 32 is disposed on the opposite side to the mufflers 21a and 21b with the vehicle body center line C interposed therebetween, but the present invention is not limited to this. That is, even if the battery 32 is disposed across the vehicle body center line C, the center of gravity of the battery 32 only needs to be located on the opposite side to the mufflers 21a and 21b. Further, it is sufficient that the battery 32 is disposed at least below the hydraulic control unit 31. Moreover, although the shaft drive type motorcycle has been exemplified, the present invention is not limited to this. The present invention can also be applied to chain-type and belt-type motorcycles.

DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Body frame 3 Fuel tank 4 Seat 5 Rear wheel 6 Front wheel 7 Rear swing arm 8 Engine unit 9 Rear cushion unit 21a, 21b Muffler 31 Hydraulic control unit 32 Battery 37 Rectifier 201 Main frame part 202 Seat frame part 211 Head Pipe 212 Tank rail 213 Down frame (lower frame)
217 Swing arm bracket (swing arm support)
218 Pivot center 221 Seat rail (upper frame)
302, 306 Upper pipe 303, 307 Lower pipe 304 Center pipe 801 Engine case C Vehicle body center line

Claims (8)

A motorcycle in which an engine unit is mounted on a front half of a body frame between a front wheel and a rear wheel, and a seat is disposed on an upper portion of the body frame behind the engine unit,
A motorcycle, wherein a battery is disposed below the upper surface of the engine case of the engine unit between the engine unit and the rear wheel.   The battery is disposed near the lower frame between a lower frame located below the engine unit of the vehicle body frame and an upper frame that supports the seat of the vehicle body frame. The motorcycle according to 1.   A muffler is disposed on one side in the vehicle width direction with respect to the vehicle body center line extending in the longitudinal direction of the vehicle body, and the battery is disposed on the other side in the vehicle width direction with respect to the vehicle body center line. The motorcycle according to claim 2, wherein The vehicle body frame includes a swing arm support portion that pivotally supports a rear swing arm that supports the rear wheel so that the rear swing arm can swing in a vertical direction.
The motorcycle according to claim 3, wherein the battery is disposed behind the swing arm support portion. A rear cushion unit for buffering and suspending the rear wheel is disposed at the center in the vehicle width direction below the seat,
The motorcycle according to claim 4, wherein the battery is disposed adjacent to the rear cushion unit in the vehicle width direction, and a rectifier is disposed between the rear cushion unit and the battery.   6. The automatic control system according to claim 5, wherein a hydraulic control unit of an anti-lock brake system for preventing locking of the front wheels and the rear wheels during braking operation is disposed below the seat and above the rear cushion unit. Motorcycle. A propeller shaft that transmits power from the engine unit to the rear wheel is disposed to be biased toward the battery in the vehicle width direction with respect to the vehicle body center line;
The motorcycle according to claim 6, wherein the battery is disposed below a lower limit position of a swing range of the propeller shaft that swings in the vertical direction along with the swing arm.   The motorcycle according to claim 7, wherein the battery is disposed in the vicinity of a swing center of the propeller shaft.

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