JP2019001208A - Body structure of motorcycle - Google Patents

Abstract

An object of the present invention is to provide a vehicle body structure of a motorcycle which improves the assemblability of a vehicle body structure and secures and maintains the needle keeping property of the vehicle. An ABS device, front and rear brake discs, front and rear brake calipers, brake pipes are disposed on one side of a center line passing through a down frame and dividing the vehicle width direction at the center when viewed from above. A muffler 34 is arranged, an oil cooler is arranged on the other side of the center line passing through the down frame 26, and an exhaust pipe inlet connected to the single-cylinder engine 15 is on the side where the ABS device 36 is arranged on the center line. The ABS device 36, the oil cooler, and the down frame 26 are disposed so as to substantially overlap each other in a side view. [Selection diagram] Fig. 1

Description

  The present invention relates to a vehicle body structure of a motorcycle typically having a so-called backbone (diamond frame) type body frame.

  2. Description of the Related Art Conventionally, for example, a motorcycle disclosed in Patent Document 1 includes a hydraulic rear hydraulic system, and an ABS unit is interposed in a hydraulic circuit that connects a rear master cylinder and a rear caliper interlocked with a brake pedal. The third hydraulic circuit from the third base part of the ABS unit to the rear master cylinder and the fourth hydraulic circuit from the fourth base part of the ABS unit to the rear caliper are respectively made by the first and second hoses made of elastic bodies. It is formed.

  According to the motorcycle according to Patent Document 1 described above, the degree of freedom of the path of the hydraulic circuit can be improved.

JP 2014-080057 A

  In the conventional example as described above, since the vehicle body structures are distributed and arranged on the left and right of the vehicle, the accessibility to the vehicle body structures is difficult, and their assembling properties are not always good. In addition, the specific vehicle body structure is concentratedly arranged on one side in the vehicle body width direction, and it is difficult to balance the weight of the vehicle body, particularly on the left and right sides, and it is difficult to ensure the maintenance of the vehicle.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle body structure for a motorcycle that improves the assembly property of the vehicle body structure and ensures and maintains the needle-keeping property of the vehicle.

  The motorcycle body structure of the present invention is a motorcycle having a single-cylinder engine and a vehicle body frame including a down frame that extends obliquely downward from a head pipe. An ABS device, front and rear brake discs, front and rear brake calipers, brake piping and silencer are placed on one side of the center line passing through the down frame, and an oil cooler is installed on the other side of the center line passing through the down frame. The exhaust pipe inlet arranged and connected to the single cylinder engine extends to the side where the ABS device is arranged across the center line so that the ABS device, the oil cooler and the down frame substantially overlap in a side view. It is characterized by being arranged in.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the assembly | attachment property of a vehicle body structure, the needle-keeping property of a vehicle can be ensured and maintained.

1 is a right front perspective view showing a vehicle body structure of a motorcycle as an application example of the present invention. 1 is a left front perspective view showing a vehicle body structure of a motorcycle as an application example of the present invention. 1 is a front view showing a vehicle body structure of a motorcycle according to the present invention. 1 is a right side view showing a vehicle body structure of a motorcycle according to the present invention. Fig. 3 is a right front perspective view showing the periphery of the body frame of the motorcycle according to the present invention. FIG. 3 is a right side view showing the periphery of the vehicle body frame of the motorcycle according to the present invention.

Hereinafter, preferred embodiments of a vehicle body structure of a motorcycle according to the present invention will be described with reference to the drawings.
A motorcycle body structure according to an embodiment of the present invention is a motorcycle having a single-cylinder engine and a body frame including a down frame extending obliquely downward from a head pipe in a vehicle body width direction in a top view. The ABS device, front and rear brake discs, front and rear brake calipers, brake piping and silencer are placed on one side across the center line passing through the down frame, and the center line passing through the down frame is sandwiched between An oil cooler is disposed on the other side, and an exhaust pipe inlet connected to the single cylinder engine extends to a side where the ABS device is disposed across the central line, and the ABS device, the oil cooler, and the The down frames are arranged so as to substantially overlap.

  In the vehicle body structure of the motorcycle of the present invention, the assembly work can be efficiently performed on the same side of the vehicle body by accessing the vehicle body from one side of the motorcycle. Further, by arranging the ABS device, the oil cooler, and the down frame so as to overlap with each other in a side view, the weight balance of the vehicle body can be taken and the needle-keeping property of the vehicle can be secured and maintained.

  In the drawings used in the following description including FIG. 1 and FIG. 2, the direction in which the rider riding the motorcycle 10 sees the front of the vehicle is defined as the front, and the opposite direction is defined as the rear. Also, the rider's right side is on the right and the left side is on the left, and these directions are indicated by arrows as needed. FIG. 1 is a right front perspective view showing a vehicle body structure of a motorcycle 10 as an application example of the present invention, and FIG. 2 is a left front perspective view showing a vehicle body structure of the motorcycle 10. First, the overall configuration of the motorcycle 10 will be described with reference to FIGS. 1 and 2.

  The motorcycle 10 is configured by forming a vehicle body skeleton by a vehicle body frame 11 made of steel or aluminum alloy, and mounting various parts on the vehicle body frame 11. Although a specific configuration of the vehicle body frame 11 will be described later, a main frame 13 extends obliquely downward and rearward from a steering head pipe 12 coupled to the front upper end portion thereof, and a seat rail 14 is provided in the vicinity of the rear portion of the main frame 13. Etc. combine. The power unit including the engine 15 is supported by the vehicle body frame 11 at a substantially central portion of the vehicle body.

  The steering head pipe 12 supports the front fork 16 so as to be turnable in the left-right direction, and a handle bar (not shown) is coupled to the upper end side of the front fork 16. A front wheel 17 is rotatably supported at the lower end of the front fork 16. The upper portion of the front wheel 17 is covered with a front fender (not shown). A swing arm 19 swingable in the vertical direction via a pivot shaft 18 (see FIG. 4) is supported by the vehicle body frame 11 behind the engine 15, and a rear wheel 20 is rotatable at the rear end of the swing arm 19. Supported by A shock absorber (not shown) is mounted between an appropriate position in the middle of the swing arm 19 in the front-rear direction and the body frame 11 side, and the rear wheel 20 is covered with a rear fender (not shown). A seat on which the rider sits is arranged on the seat rail 14 above the rear wheel 20.

  The engine 15 is a four-cycle single cylinder (or more than two cylinders) engine, and may be a water-cooled or air-cooled engine. In the basic configuration of the engine 15, a crankcase 21 that rotatably supports and accommodates a crankshaft that is horizontally disposed in the left-right direction, and an upper portion of the crankcase 21 are coupled to each other so that the axis thereof is tilted forward to a substantially vertical direction. And a cylinder block 22 set in a direction. Further, the engine 15 includes a cylinder head 23 coupled to the upper part of the cylinder block 22 and a cylinder head cover 24 that covers the cylinder head 23.

  Further, the periphery of the vehicle body frame 11 will be described with reference to FIGS. 3 is a front view showing the vehicle body structure of the motorcycle 10, and FIG. 4 is a right side view showing the vehicle body structure of the motorcycle 10. As shown in FIG. The vehicle body frame 11 in this embodiment may be a backbone (diamond frame) type, for example, or a single cradle type or the like can be selected. A main frame 13 extending obliquely downward and rearward from the steering head pipe 12 is curved downward substantially at the center in the front-rear direction of the vehicle, and a pair of side frames 25 projecting to the left and right in the vicinity of the lower end portion thereof are roughly Join to form a portal. A plurality of brackets for engine mounting project from the main frame 13 and the side frame 25 to support the engine 15. The down frame 26 extends straight from the steering head pipe 12 obliquely downward to the rear. The down frame 26 supports the front portion of the crankcase 21 of the engine 15 via a bracket 27 for mounting the engine.

  Also, a pair of left and right seat rails 14 are coupled near the rear portion of the main frame 13, and the seat rails 14 extend above the rear wheels 20. The main frame 13 and the pair of seat rails 14 are joined in a Y shape in a top view. Further, a pair of left and right pillars 28 are coupled to the vicinity of the gate-shaped shoulder portion of the side frame 25, and these pillars 28 are coupled to the vicinity of the rear end portion of the seat rail 14. A body frame having a three-dimensional structure is constituted by these frame members, and high support rigidity for the engine 15 is ensured.

  In the above case, the fuel tank 29 located above the engine 15 is mounted on the main frame 13 as shown in FIG. The fuel tank 29 is elastically supported by the main frame 13. In the appearance of the motorcycle 10 having such a vehicle body structure, although not shown, various vehicle body covers such as a side cover and a rear cover may be supported and attached at appropriate positions such as a vehicle body frame. A headlamp may be mounted above the front wheel 17 and a winker or the like may be mounted before and after the vehicle.

  In the intake system of the engine 15, the air cleaner 30 is disposed so as to be sandwiched between the right seat rail 14 and the pillar 28 as shown in FIG. 1, and the air cleaned by the air cleaner 30 is supplied to the engine 15. A throttle body 32 is formed in the middle of an intake passage 31 formed between an air cleaner 30 and an intake port (not shown) provided at the rear portion of the cylinder head 23, and connects the two. A mixture of a predetermined mixture ratio is supplied to the intake port. Further, the combustion gas that has exploded and burned in the cylinder block 22 of the engine 15 is discharged from the engine 15 in the exhaust system. That is, the combustion gas generated in the engine 15 passes through the exhaust pipe 33 connected to the exhaust port (not shown) of the engine 15 as exhaust gas, and is finally exhausted from the muffler 34 (silencer). In addition, the chamber 35 is arrange | positioned between the exhaust pipe 33 and the muffler 34, and these are connected mutually.

  The vehicle body width direction is divided at the center when the motorcycle 10 is viewed from above, and the ABS device 36 is located on one side across the center line L passing through the down frame 26 as shown in FIG. (Antilock Brake System) is placed. The ABS device 36 is attached to the right side surface of the down frame 26 in the vicinity of the coupling portion with the steering head pipe 12 via a bracket 37, and a front wheel brake hose (or pipe) 38 or a rear wheel brake hose (or pipe) 39. Is extended. As shown in FIG. 1, a single brake disc 40 is fixed to the axle of the front wheel 17 inside the right front fork 16, and a brake caliper 41 is fixed to the right front fork 16. The front wheel brake hose 38 connected to the brake caliper 41 is connected to the down frame 26 via a connector (or adapter) 42 fixed to the front side of the down frame 26 below the steering head pipe 12 as shown in FIG. To be established. The front wheel brake hose 38 is routed from the connector 42 to the brake caliper 41.

  A single brake disc 43 (see FIGS. 4 to 6) is fixed to the axle of the rear wheel 20 inside the right swing arm 19, and a brake caliper 44 is fixed to the right swing arm 19. The rear wheel brake hose 39 connected to the brake caliper 44 is fixed to, for example, an appropriate position of the side frame 25 via a connector (or adapter) 45 fixed near the inside of the side frame 25 as shown in FIG. . The rear wheel brake hose 39 is routed from the connector 45 to the rear wheel brake caliper 44.

  Thus, the ABS line 36, the front and rear brake discs 40 and 43, the front and rear brake calipers 41 and caliper 44, the front and rear brake hoses 38 and the hose 39 through the down frame 26 are center lines L (see FIG. 3) is arranged on one side. Further, the muffler 34 is also arranged on one side of the center line L as shown in FIG.

1 and 6 and the like, the exhaust pipe inlet 33a of the exhaust pipe 33 connected to the engine 15 extends to the side where the ABS device 36 is disposed, that is, the right side with the center line L interposed therebetween.
On the other hand, an oil cooler 46 is disposed on the other side across the center line L passing through the down frame 26, on the left side in this embodiment, as shown in FIG. In this case, the oil cooler 46 is attached to the down frame 26 via a plurality of brackets 47 along the inclination of the down frame 26 in front of the cylinder head 23 and the cylinder head cover 24 of the engine 15.

  Further, as shown in FIG. 6, the ABS device 36, the oil cooler 46, and the down frame 26 are disposed so as to substantially overlap in a side view (see also FIG. 5). In this case, as shown in FIG. 3, the ABS device 36 projects from the center line L passing through the down frame 26 to the right side, and the oil cooler 46 projects from the center line L to the left side.

  In the above case, the battery 48 is mounted substantially corresponding to the air cleaner 30 as shown in FIG. 2, that is, the battery 48 is disposed so as to be sandwiched between the left seat rail 14 and the pillar 28. That is, the air cleaner 30 and the battery 48 are arranged so that at least a part thereof overlaps in a side view. Note that the air cleaner 30 and the battery 48 can be mounted in the left-right arrangement relationship opposite to the above.

  First, the assembly property of the vehicle body structure will be described. In the vehicle body structure of the motorcycle 10 of the present invention, brake-related vehicle body structures are concentrated on one side in the vehicle body width direction, that is, on the right side in this embodiment. For this reason, when the brake-related body structure is assembled to the vehicle body, the worker can easily access the vehicle body, that is, the worker can perform assembly work without frequently moving between the left and right sides of the vehicle body. The attachment is improved. In addition, the parts that require maintenance are close to the vehicle side surface, so that the maintenance is excellent. For example, since the hoses and the like are not routed so as to run from the right to the left of the vehicle, maintenance work can be performed without plunging into the center of the vehicle.

  Specifically, an ABS device 36, front and rear brake discs 40 and 43, front and rear brake calipers 41 and caliper 44, front and rear brake hoses 38 and brake hoses are provided on one side of the center line L passing through the down frame 26. 39 is arranged. In this embodiment, by accessing the vehicle body from the right side of the motorcycle 10, the assembly work can be carried out efficiently on the same side of the vehicle body.

  Next, with respect to the vehicle body weight balance, the brake-related vehicle body structures are concentratedly arranged on one side in the vehicle body width direction. In the present invention, the needle holding performance can be maintained by disposing the ABS device 36, the oil cooler 46, and the down frame 26 in a side view.

  Specifically, an oil cooler 46 is arranged on the other side across the center line L passing through the down frame 26, that is, on the left side in this embodiment. In this case, the ABS device 36 and the down frame 26 are arranged so as to overlap with the heavy oil cooler 46 in a side view, whereby the left and right weight balance of the motorcycle 10 can be balanced.

  Further, the ABS device 36 is disposed in front of the cylinder head 23 and separated from the engine 15 and is mounted so as not to overlap the front end portion of the fuel tank 29 as shown in FIG. The ABS device 36 that is easily affected by heat is made less susceptible to the influence of heat from the engine 15 and always exhibits an appropriate function, thereby contributing to improvement of safety. In this case, heat from the engine 15 is prevented from accumulating around the ABS device 36 and is easily removed upward. In addition, by disposing the ABS device 36 closer to the front of the vehicle, there are advantages such that the traveling wind of the motorcycle 10 is easily received and the cooling performance of the ABS device 36 is excellent.

  In addition, the air cleaner 30 and the battery 48 can be arranged behind the engine 15 with good left-right balance, and a plurality of vehicle body structures can be mounted in a compact manner.

As mentioned above, although this invention was demonstrated with various embodiment, this invention is not limited only to these embodiment, A change etc. are possible within the scope of the present invention.
The plurality of vehicle body structures in the above-described embodiment can be mounted in a reverse lateral relationship as a whole, and similar effects can be obtained.

DESCRIPTION OF SYMBOLS 10 Motorcycle, 11 Body frame, 12 Steering head pipe, 13 Main frame, 14 Seat rail, 15 Engine, 16 Front fork, 17 Front wheel, 18 Pivot shaft, 19 Swing arm, 20 Rear wheel, 21 Crankcase, 22 Cylinder block , 23 Cylinder head, 24 Cylinder head cover, 25 Side frame, 26 Down frame, 27 Bracket, 28 pillar, 29 Fuel tank, 30 Air cleaner, 31 Intake passage, 32 Throttle body, 33 Exhaust pipe, 34 Muffler, 35 Chamber, 36 ABS Device, 37 Bracket, 38 Brake hose for front wheel, 39 Brake hose for rear wheel, 40, 43 Brake disc, 41, 44 Brake caliper, 42, 45 Connector, 46 Oil cooler, 47 bracket, 48 battery.

Claims (2)

In a motorcycle having a single-cylinder engine and a body frame including a down frame that extends obliquely downward from the head pipe,
An ABS device, front and rear brake discs, front and rear brake calipers, brake piping, and silencer are arranged on one side across the center line passing through the down frame by dividing the vehicle body width direction in the top view.
An oil cooler is placed on the other side across the center line passing through the down frame,
An exhaust pipe inlet connected to the single cylinder engine extends to the side where the ABS device is disposed across the center line,
A motorcycle body structure, wherein the ABS device, the oil cooler, and the down frame are arranged so as to substantially overlap each other in a side view. The vehicle body frame has a pair of left and right seat rails and pillars connected to the rear part of the main frame,
An air cleaner disposed so as to be sandwiched between the seat rail on either one of the left and right sides and the pillar, and a battery disposed so as to be sandwiched between the seat rail on either the left or right side and the pillar. The body structure of a motorcycle according to claim 1, wherein at least a part thereof overlaps in a side view.

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