JP5118575B2 - Motorcycle - Google Patents

Description

  The present invention relates to a motorcycle, and more particularly, to a motorcycle in which a main frame and a pivot plate overlap each other when the vehicle is viewed from the side.

There is known a motorcycle in which a pivot plate overlaps a part of an engine when the vehicle is viewed from the side (see, for example, Patent Document 1).
JP 2007-203852 A (FIG. 1)

  In FIG. 1 of Patent Document 1, a motorcycle is equipped with a V-type engine 8 (the reference sign is the same as that of the same publication. The same applies hereinafter), and the rear bank of the V-type engine 8 is provided. When the vehicle is viewed from the side, the cylinder head 12 is disposed so as to overlap a pair of left and right main frames 2 and a center frame 24 (hereinafter referred to as “pivot plate 24”) provided at the rear end portions thereof. ing. In addition, a fuel tank 23 is disposed above the V-type engine 8.

  Thus, since the upper surface and the left and right side surfaces of the V-type engine 8 are surrounded by a plurality of different members, the heat of the V-type engine 8 is difficult to escape. Then, the pivot plate 24 arranged outside the V-type engine 8 is a member that easily rises in temperature. In particular, the pivot plate 24 is a member on which the driver's legs are located on the outside, and a technique for making it difficult for the engine heat transmitted to the pivot plate 24 to be transmitted to the driver is desired.

  The present invention provides a technique for making it difficult for a driver to transmit heat of an engine transmitted to a pivot plate in a motorcycle in which a pivot plate overlaps a part of the engine when the vehicle is viewed from the side. Let it be an issue.

The invention according to claim 1, a head pipe, a main frame extending rearward from the head pipe, and a pivot plate that is provided at a rear end portion of the main frame, a pivot shaft provided in the pivot plate, a rear swing arm extending from the pivot axis toward the rear of the vehicle, comprising an engine is suspended by main frame and the pivot plate, and when the vehicle is viewed from the side, with the pivot plate overlaps the rear portion of the engine In a motorcycle, a recess is provided on the outer surface of the pivot plate, and a pivot plate cover is provided on the pivot plate so as to cover the pivot plate cover while maintaining a gap in the recess. It is characterized by being.

  The invention according to claim 2 is characterized in that the concave portion includes a curved portion that gently curves inward in the width direction or an inclined portion that gently concaves inward in the width direction.

In the invention according to claim 3, the peripheral edge of the pivot plate cover is provided with a plurality of ribs extending inward of the vehicle body, the plurality of ribs abut against the pivot plate, and the traveling wind is between the plurality of ribs. Passing through the gap and flowing backward through the vehicle .
According to a fourth aspect of the present invention, when the vehicle is viewed from the side, the main frame overlaps the front cylinder and the rear cylinder constituting the upper part of the engine, and a part of the pivot plate overlaps the crankcase constituting the rear part of the engine. And
According to a fifth aspect of the present invention, a fuel tank cover that covers the fuel tank is attached to the main frame, a knee cover that covers the lower portion of the fuel tank cover and is sandwiched between the legs of the driver during operation is provided, and a pivot plate is provided below the knee cover. A cover is provided.
According to a sixth aspect of the present invention, an exhaust pipe extends downward in the vicinity of the inside of the hanging part constituting the pivot plate, and the exhaust pipe is surrounded by an exhaust pipe cover.
According to a seventh aspect of the present invention, an opening is provided in the rear portion of the pivot plate cover so as to allow the traveling wind to be taken into the vehicle.
According to an eighth aspect of the present invention, a driver step attached to the main frame is provided below the pivot plate cover.

In the invention according to claim 1, a recess is provided on the outer side surface of the pivot plate which is affected by the heat of the engine, and the recess is covered with the pivot plate cover while maintaining a gap.
While the vehicle is traveling, a heat insulating layer is formed in a gap formed between the recess provided in the pivot plate and the pivot plate cover.

  A heat insulating layer of air is formed between the recess provided in the pivot plate and the pivot plate cover, so that it is difficult for the heat of the engine to be transferred from the pivot plate to the driver's legs, and comfort during driving can be improved. .

  In the invention according to claim 2, the concave portion includes a curved portion that gently curves inward in the width direction or an inclined portion that gently concaves inward in the width direction. The assembly of the plate cover is also improved.

In the invention according to claim 3, the peripheral edge of the pivot plate cover is provided with a plurality of ribs extending inward of the vehicle body, and the plurality of ribs are in contact with the pivot plate.
Since the traveling wind passes between the ribs, passes through the gap, and flows backward, the mounting rigidity of the pivot plate cover can be increased while maintaining the air permeability between the recess and the pivot plate cover.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. In the figure, “up”, “down”, “left”, “right”, “front”, and “rear” are directions viewed from the occupant seated in the vehicle. The drawings are viewed in the direction of the reference numerals.

FIG. 1 is a left side view of a vehicle according to the present invention. A motorcycle 10 as a vehicle is provided with a body frame 11.
The vehicle body frame 11 includes a head pipe 12, a main frame 14 that extends rearward from the head pipe 12 and supports the engine 13, and extends rearward from the upper rear end of the main frame 14 to support the occupant seat 15. And a rear frame 19 for attaching an electrical component such as 16 and supporting a vehicle body rear portion 18 including a rear fender 17.
The main frame 14 includes a pivot plate 22 provided at the rear end of the main frame 14 and supporting the swing arm 28.

  A pivot shaft 27 is provided on the pivot plate 22, and a rear swing arm 28 (swing arm 28) extends rearward from the pivot shaft 27, and a rear that absorbs an impact between the swing arm 28 and the main frame 14. A cushion unit 29 is provided, and a rear wheel 31 is attached to the tip of the swing arm 28. The rear wheel 31 is driven by a drive shaft (not shown) that connects between the engine 13 and the rear wheel 31.

  The head pipe 12 is provided with a front fork 24, a front wheel 25 is attached to the lower end portion of the front fork 24, and a steering handle 26 for steering the front wheel 25 is provided at the upper end portion of the front fork 24.

  An engine 13 (V-type four-cylinder engine 13) is mounted on the main frame 14. The engine 13 is supported by the main frame 14 via first to fourth support points 30a to 30d. The first to fourth support points 30a to 30d are provided horizontally in the vehicle width direction, and are arranged in this order from the front to the rear of the vehicle. Among these support points, the third to fourth support points 30 c to 30 d are provided on the pivot plate 22. That is, the engine 13 is suspended by the main frame 14 and the pivot plate 22.

  The V-type four-cylinder engine 13 includes a crankcase 37, a front cylinder 35 extending obliquely forward and upward with a crankshaft 34 provided in the crankcase 37 as a center, and extending obliquely rearward and upward with the crankshaft 34 as a center. After that, the cylinder 36 is arranged in a V shape. In the V-type four-cylinder engine 13, when the vehicle is viewed from the side, the main frame 14 overlaps the front cylinder 35 and the rear cylinder 36 that constitute the upper part of the engine 13, and the crankcase that constitutes the rear part of the engine 13. 37 is suspended so that a part of the pivot plate 22 overlaps.

The V-type four-cylinder engine 13 is provided with an exhaust device 33.
The exhaust device 33 includes exhaust pipes 41 a to 41 d extending from the cylinders 35, 35, 36, 36, a catalyst pipe 45 that collects the exhaust pipes 41 a to 41 d and purifies exhaust gas, and the catalyst pipe 45. And a muffler 47 connected to the general collecting pipe 46.

  In the figure, 51 is a radiator unit for cooling the engine 13, 52L, 52R (only the front side reference numeral 52L is shown, the same applies hereinafter), front disk brake caliper provided on the front fork, 53L, 53R (front side reference numeral 53L only) The same applies hereinafter.) Is a front disk plate provided on the front wheel 25 and sandwiched between the front disk brake calipers 52L and 52R, 54 is a front master cylinder provided on the steering handle, 56 is a fuel tank attached to the main frame 14 and covers a fuel tank described later. The fuel tank covers 57L and 57R (only the front side reference numeral 57L are shown, the same applies hereinafter) also serving as the cowl portion 70 to be attached are shown to the driver steps 58L and 58R (only the front side reference numeral 58L attached to the main frame 14). The same shall apply hereinafter) for the rear frame 19. Steps for passengers, 59, headlights, 60, front fenders, 61L, 61R (only reference numeral 61L on the front side is shown), mirrors, 62, rear disc brake calipers, 63, rear wheels 31 A rear disc plate 65, which is sandwiched by the disc brake caliper 62, is a main stand.

Hereinafter, the cowl part 70 which mainly constitutes the exterior part of the motorcycle 10 will be described.
The cowl portion 70 includes a front cowl portion 72 that extends from the head pipe 12 and covers the front of the vehicle body frame 11 via a cowl stay 71 described later, and a side cowl portion that is provided continuously from the front cowl portion 72 and covers the side of the vehicle. 73 and an under cowl 74 provided below the engine 13 for the purpose of improving wind protection and the appearance of the vehicle.

  The front cowl 72 includes an upper center cowl 76 that covers the top of the headlight 59, a wind screen 77 that extends above the upper center cowl 76, and middle cowls 78L and 78R that cover the sides of the main frame 14 (see FIG. The front upper side cowl 79L and 79R (only the front side reference numeral 79L is shown. The same applies hereinafter) to which the left and right sides of the wind screen 77 are attached are shown. .

  The side cowl portion 73 covers the front upper side cowls 79L and 79R that support the left and right sides of the wind screen 77, the middle cowls 78L and 78R that cover the sides of the head pipe 12 and the main frame 14, and the lower part of the fuel tank cover 56. Knee covers 81L and 81R (only the reference numeral 81L on the front side of the figure is shown; the same applies hereinafter) sandwiched between the legs Rf of the driver R during driving, and components of the main frame 14 provided below these knee covers 81L and 81R Pivot plates 22L and 22R (only the reference numeral 22L on the front side of the figure is shown. The same applies hereinafter) pivot plate covers 82L and 82R that cover the outer surface.

  FIG. 2 is a right rear side view of the vehicle according to the present invention. Hereinafter, description will be given with reference to FIGS. On the right side of the motorcycle 10, two exhaust pipes 41c and 41d connected to the rear cylinder 36 of the engine 13 extend from the rear to the front, and a collecting pipe for collecting exhaust in front of the exhaust pipes 41c and 41d. 43 are connected. The collecting pipe 43 is joined by exhaust pipes 41 a and 41 b extending from the front cylinder 35 and a catalyst pipe 45 and connected to a silencer 47.

  A reservoir tank 111 is disposed on the right side of the rear portion of the engine 13, and a reservoir tank cover 112 that stores a radiator liquid is disposed outside the reservoir tank 111. Reference numeral 113 denotes a rear master cylinder that generates a brake pressure to be applied to the rear brake caliper 62, and reference numeral 114 denotes a silencer cover.

  FIG. 3 is an exploded perspective view of attaching the pivot plate cover to the pivot plate. The recesses 115 and 115 (the front side 115 are formed by recessing the outer side surface of the pivot plate 22 constituting the rear portion of the main frame 14 to flow inward. And only the recesses 115 and 115 are covered with pivot plate covers 82L and 82R. 121L and 121R are pivot shaft support portions, 122L and 122R are rear frame connecting portions, and 123L and 123R are link bracket portions that support links provided on the swing arm (reference numeral 28 in FIG. 1).

  Hereinafter, the structure of the engaging portion and the peripheral portion provided between the left pivot plate 22L and the left pivot plate cover 82L will be described. Since the left and right engaging portions and their peripheral portions have the same structure, the description of the right engaging mechanism is omitted.

  Two engagement seats 124L for attaching the pivot plate cover 82L to the pivot plate 22 from the inside of the vehicle via bolts or the like, having holes 125L, 125L for engaging the pivot plate 22L on the upper inner side surface of the pivot plate cover 82L, 124L, engagement holes 125L and 125L formed in these engagement seats 124L and 124L, and one engagement claw 127L projecting in a rod shape are provided, and the lower part of the pivot plate 22 is provided from the outside of the vehicle. A mounting hole 129 is provided to allow the pivot plate cover 82L to be attached to the pivot plate 22 by a bolt 128 screwed inward.

  4 is a front view of the pivot plate cover, FIG. 5 is a view taken in the direction of the arrow 5 in FIG. 4, and FIG. 6 is a sectional view for explaining that a rib provided on the pivot plate cover is in contact with the pivot plate. Hereinafter, description will be given with reference to FIGS.

The peripheral edge 82Ls of the pivot plate cover 82L is provided with a plurality of ribs 131 extending inward of the vehicle body, and the plurality of ribs 131 are in contact with the pivot plate 22L.
On the other hand, the pivot plate 22L is provided with a recess 115L that is recessed inward in the width direction, and this recess 115L includes an inclined portion 132L that is gently recessed inward in the width direction.

With the concave portion 115L including such an inclined portion 132L, stress concentration can hardly be generated around the concave portion 115L, so that the influence on the change in the rigidity of the pivot plate 22L can be suppressed. If the change in the rigidity of the pivot plate 22L can be suppressed, the influence of the change in the controllability of the vehicle can be minimized by providing the recess 115L.
It should be noted that the above-described inclined portion may be a curved portion that gently curves inward in the width direction.

  A plurality of ribs 131 extending inward of the vehicle body are provided on the peripheral edge 82Ls of the pivot plate cover 82L, and the plurality of ribs 131 are in contact with the pivot plate 22.

  The traveling wind passes between the ribs 131..., Passes through the gap 133, and can flow backward, so that the air permeability between the recess 115 </ b> L and the pivot plate cover 82 </ b> L is not impaired, and the pivot plate cover 82L can be firmly fixed to the pivot plate 22, and the mounting rigidity of the pivot plate cover 82L can be increased.

In FIG. 6B, an operation explanatory diagram when a load P is applied from the outside of the pivot plate cover 82L.
Since the concave portion 115L of the pivot plate 22 is provided with an inclined portion 132L that is gently recessed inward in the width direction, even when a load P is applied from the outside of the pivot plate cover 82L, the rib 131 can be Elastically deforms in the direction. That is, the rib 131 is difficult to protrude from the recess 115L. Therefore, the alignment of the pivot plate 22 and the pivot plate cover 82L can be easily maintained.

  The right pivot plate 22R has the same structure and operation as the left pivot plate 22L, and a description thereof will be omitted.

7 is a cross-sectional view taken along line 7-7 of FIG. 2, and is a cross-sectional view of the pivot plate 22 constituting the main frame 14. As shown in FIG.
Since the pivot plate 22 is an aluminum cast product having a plurality of hollow portions 135a to 135d, both the weight reduction and the rigidity increase of the pivot plate 22 can be achieved.

In order to take heat countermeasures on the outer side surfaces 22Lu and 22Ru of the left and right hanging parts constituting the pivot plate 22, recesses 115L and 115R are provided on the outer surface of the pivot plate 22, and gaps 133 and 133 are formed in these recesses 115L and 115R. The pivot plate covers 82L and 82R are covered so that the heat of the pivot plate 22 heated by the engine (reference numeral 13 in FIG. 1) and the exhaust pipes 41c and 41d is not easily transmitted to the pivot plate covers 82L and 82R.
In the figure, reference numeral 137 denotes an exhaust pipe cover for heat shielding provided to prevent the pivot plate 22 from being heated, 140 is a drive shaft cover, 65s is a main stand support part, and 65d is a main stand shaft part.

8 is a cross-sectional view taken along line 8-8 of FIG. 2, and the pivot plate covers 82L and 82R are covered with the gaps 133 and 133 on the outer side surfaces of the left and right hanging parts 22L and 22R constituting the pivot plate 22, respectively.
Right and left rear exhaust pipes 41c and 41d extend downward in the vicinity of the right hanging parts 22L and 22R, and the periphery of the left and right rear exhaust pipes 41c and 41d is a first exhaust pipe as an exhaust pipe cover. cover 13 7 and is surrounded by a second exhaust pipe cover 138. Since the left and right rear exhaust pipes 41c and 41d are surrounded by the first exhaust pipe cover 137 and the second exhaust pipe cover 138, the amount of heat transfer from the left and right rear exhaust pipes 41c and 41d to the right hanging part 22Ru is reduced. Can be suppressed. In the figure, 141 is a support shaft as a component of the third support point 30c, 142 and 142 are buffer members that make it difficult for vibration of the engine to be transmitted to the vehicle body frame side, and 143 and 143 are fastening members.

9 is a cross-sectional view taken along line 9-9 in FIG. 2, and FIG. 10 is a cross-sectional view taken along line 10-10 in FIG. Hereinafter, description will be given with reference to FIGS.
The left and right hanging portions 22L and 22R constituting the pivot plate 22 respectively have hollow portions 135e to 135f, and the left and right lower ends of the hanging portions 22L and 22R are connected by the connecting portion 22c. The rigidity can be further increased.

  The swing arm 28 is provided with a drive shaft (reference numeral 32 in the figure) for transmitting the driving force of the engine 13 to the rear wheel on the inner side, and the direction of the driving force is changed at the rear end portion to drive the driving wheel to the rear. A gear box 145 having a function of transmitting to the wheel 31 is provided. The rear wheel 31 is rotatably supported by the gear box 145.

  The rear wheel 31 includes a hub 31h, a rim 31r extending around the hub 31h, and a tire 31t attached to the rim 31r. Between the rear wheel 31 and the gear box 145, braking is performed. A rear disk plate 63 that is sometimes used is arranged.

  A reservoir tank 111 for storing the radiator liquid is disposed inside the left and right hanging portions 22L and 22R and inside the swing arm 28. A reservoir tank cover 112 covers the right outside of the reservoir tank 111. It has been broken.

The operation of the motorcycle described above will be described next.
FIG. 11 is an explanatory diagram of the operation of the motorcycle according to the present invention. As described above, the hanging portions 22L and 22R of the pivot plate 22 have the same structure. Therefore, in the following description, the operation of the left hanging portion 22L is representative. To explain.
A concave portion 115L is provided on the outer side surface of the hanging portion 22L of the pivot plate 22 that is affected by the heat of the engine 13, and the concave plate 115L is covered with a pivot plate cover 82L while maintaining a gap.

  An air heat insulating layer is formed by a gap (reference numeral 133 in FIG. 7) formed between the recess 115L provided in the pivot plate 22L and the pivot plate cover 82L, so that the engine heat transmitted to the pivot plate cover 82L. Can be made difficult to be transmitted to the driver R.

  Further, during traveling of the vehicle, the traveling wind passes through the gap (reference numeral 133 in FIG. 6) between the ribs 131... Intermittently provided on the peripheral edge 82Ls of the pivot plate cover 82L. It flows to the rear of the vehicle as a1 to a4.

  When traveling wind flows in the gap 133, an air flow is formed between the recess 115L provided in the pivot plate 22L and the pivot plate cover 82L, so that the engine heat transmitted to the pivot plate cover 82L is transmitted to the driver. Further transmission can be made difficult. If it becomes difficult for the heat of the engine to be transmitted to the driver's leg Rf, the comfort during driving can be improved.

  FIG. 12 shows another embodiment of FIG. 2 is the structure of the pivot plate covers 182R and 182L (only the reference numeral 182R on the front side of the figure is shown), and the rear portions 183L and 183R of the pivot plate covers 182R and 182L (only the reference numeral 183R on the front side of the figure is shown). ), A plurality of openings 151R..., 151L... (Only the reference numeral 151R. There are no other significant differences. Reference numeral 153 denotes a regulator as an electrical component arranged in the rear frame 19.

  FIG. 13 is a cross-sectional view taken along line 13-13 of FIG. 12, and since the openings 151L and 151R are opened at the rear portions of the pivot plate covers 182L and 182R, the traveling wind flows from the openings 151L and 151R. n flows into the interior of the vehicle, flows around the regulator 153, and cools the regulator 153. Therefore, the temperature rise of the regulator 153 can be suppressed.

  Although the present invention is applied to a motorcycle in the embodiment, it may be applied to a general saddle type vehicle.

  The present invention is suitable for a motorcycle in which a main frame and a pivot plate overlap a part of an engine when the vehicle is viewed from the side.

1 is a left side view of a vehicle according to the present invention. It is a right rear part side view of the vehicle which concerns on this invention. It is a disassembled perspective view which attaches a pivot plate cover to a pivot plate. It is a front view of a pivot plate cover. FIG. 5 is a view taken in the direction of arrow 5 in FIG. 4. It is sectional drawing explaining the rib provided in the pivot plate cover being contact | abutted to the pivot plate. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 2. FIG. 9 is a sectional view taken along line 9-9 in FIG. 2. FIG. 10 is a cross-sectional view taken along line 10-10 of FIG. FIG. 6 is an operation explanatory diagram of the motorcycle according to the present invention. It is another Example figure of FIG. FIG. 13 is a sectional view taken along line 13-13 of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 12 ... Head pipe, 13 ... Engine, 14 ... Main frame, 22 ... Pivot plate, 22Lu, 22Ru ... Outer surface of pivot plate, 28 ... Rear swing arm (swing arm), 82L, 82R ... Pivot plate Cover, 82Ls, 82Rs ... peripheral edge of pivot plate cover, 115L, 115R ... concave portion, 131 ... rib, 132L, 132R ... inclined portion, 133 ... gap.

Claims (8)

A head pipe (12), a main frame (14) extended from the head pipe (12) backward, and provided at the rear end that the pivot plate of the main frame (14) (22), the pivot plate provided (22) pivot shaft (27), a rear swing arm extending from the pivot shaft (27) to the rear of the vehicle (28), said suspended by the main frame (14) and said pivot plate (22) that the engine (13), provided with, when the vehicle is viewed from the side, at the rear in the motorcycle pivot plate (22) overlaps said engine (13),
Said pivot plate (22) recesses (115L, 115R) on the outer surface of the provided covered with a pivot plate cover (82L, 82R) while maintaining a gap (133, 133) in the recess (115L, 115R),
The pivot shaft support portion (121L, 121R) provided on the pivot plate (22) and supporting the pivot shaft (27) is provided at a portion avoiding the concave portion (115L, 115R). Motorcycle. The motorcycle according to claim 1 , wherein the concave portions (115L, 115R) include a curved portion that gently curves inward in the width direction or an inclined portion that gently concaves inward in the width direction. A plurality of ribs (131) extending inward of the vehicle body are provided on the periphery of the pivot plate cover (82L, 82R) , and the plurality of ribs (131) are in contact with the pivot plate (22) ,
The motorcycle according to claim 1 , wherein the traveling wind passes between the plurality of ribs (131), passes through the gaps (133, 133), and flows toward the rear of the vehicle .   When the vehicle is viewed from the side, the main frame (14) overlaps the front cylinder (35) and the rear cylinder (36) that constitute the upper part of the engine (13), thereby constituting the rear part of the engine (13). The motorcycle according to claim 1, wherein a part of the pivot plate (22) overlaps the crankcase (37).   A fuel tank cover (56) that covers the fuel tank is attached to the main frame (14), covers a lower portion of the fuel tank cover (56), and is covered by a leg (Rf) of the driver (R) during operation. (81L, 81R) are provided,
  The motorcycle according to claim 1, wherein the pivot plate cover (82L, 82R) is provided below the knee cover (81L, 81R).   An exhaust pipe (41) extends downward in the vicinity of the inside of the hanging part (22R) constituting the pivot plate (22), and is surrounded by an exhaust pipe cover (137, 138) around the exhaust pipe (41). The motorcycle according to claim 1, wherein the motorcycle is provided.   The motorcycle according to claim 1, characterized in that openings (151L, 151R) through which traveling wind can be taken into the vehicle are opened at the rear of the pivot plate covers (82L, 82R).   The motorcycle according to claim 1, further comprising a driver step (58L, 58R) attached to the main frame (14) below the pivot plate cover (82L, 82R).

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