Saddle-type vehicle

[0036] Hereinafter, a motorcycle 1 (straddle-type vehicle) according to an embodiment of the present invention will be described with reference to the drawings. figure 1 It is a left side view showing the schematic structure of the motorcycle 1 with the lights and the fairing removed, figure 2 It is a plan view with the fuel tank and seats removed. In addition, the concept of the direction used in the following description is based on the direction viewed by the driver (user) riding on the motorcycle.

[0037] The motorcycle 1 includes a front wheel 2 as a driven wheel and a rear wheel 3 as a driving wheel. The front wheel 2 is rotatably supported by the lower ends of a pair of left and right front forks 4 extending substantially in the vertical direction, and the upper part of the front fork 4 is supported by a steering shaft (not shown) through a pair of upper and lower brackets 5. The steering shaft is interposed and rotatably supported in a head pipe 6 constituting a part of the body frame of the motorcycle 1.

[0038] Separate handles 7 bifurcated from left and right are installed on the upper bracket 5, and the driver can steer the front fork 4 and the front wheel 2 by grasping these handles 7. Although the illustration is omitted, the handle 7 on the right is integrally provided with a throttle handle that the user holds with the right hand, and a brake lever on the side of the front wheel 2 is arranged in front of it. On the other hand, the handle 7 on the left is provided. A clutch lever is provided on the front of the.

[0039] Such as figure 1 , figure 2 As shown, the body frame of the motorcycle 1 includes a main frame 8 that is slightly inclined downward from the head pipe 6 and extends rearward. The main frame 8 is composed of left and right frame members 80 that diverge into two strands from the head pipe 6 to the rear. In this example, each frame member 80 is composed of two round pipes 80a, 80b arranged up and down (in Figure 3 ~ Figure 7 The winning mark is composed of symbols). The rear ends of the left and right frame members 80 are connected by a substantially rectangular beam 9 having a closed cross-sectional structure as described below, and are connected to the rear frame 10 by the beam 9.

[0040] In this embodiment, the rear frame 10 consists of two pressed steel plates 11a, 11b (only in image 3 (Indicated by the symbol), a backbone frame 11 of a closed cross-section structure formed by overlapping from left and right, and a rear tube frame 12 connected to the rear. Such as figure 2 As shown, the spine frame 11 extends back and forth in the approximate center of the width of the vehicle body, and on its upper part, such as figure 1 As shown by the dotted line, a seat 13 on which the driver rides is provided. Similarly, as shown by the broken line, a seat 14 for a passenger is also arranged on the upper part of the rear tube frame 12 at the rear.

[0041] The spine frame 11 is formed by integrating a pivotal frame portion extending downward from the cross member 9 and a rear stay that is slightly inclined upward and extending rearward. Plate-shaped sub-frames 15 are respectively arranged on both sides, and are connected by struts and the like (not shown) extending in the vehicle width direction. A pivot 16a is provided between the pivot frame and the sub-frame 15 to swingably support the front end of the rocker arm 16, and the rear wheel 3 is rotatably supported at the rear end of the rocker arm 16.

[0042] An engine 20 having a plurality of cylinders is mounted under the main frame 8. The cylinder block 21 and the cylinder head 22 of the engine 20 are slightly inclined forward, and the front part of the cylinder block 21 is supported by a downward frame 81 that hangs downward from the main frame 8. In addition, a crankcase 23 is attached to the lower portion of the cylinder block 21, and a transmission case integrally provided at the rear portion of the crankcase 23 is supported by the spine frame 11. An alternator 24 is arranged on the left side of the transmission case.

[0043] In addition, at the front of the cylinder head 21, an exhaust passage is opened for each cylinder, and an exhaust manifold 25 connected to it is assembled under the engine 20 and connected to a muffler 26. A radiator 27 that exchanges heat between the coolant of the engine 20 and the traveling wind is arranged above the exhaust manifold 25 and is supported by the downward frame 81. On the other hand, at the rear of the cylinder head 20, the intake port opens, which is connected to the throttle body 28. The upper part of the throttle body 28 is connected to the lower part of an air cleaner 29 that houses a filter element for filtering intake air.

[0044] Such as figure 2 As shown, the main frame 8 travels backward from the head pipe 6 and gradually expands to the left and right. After the width dimension becomes the largest in the approximate center, the main frame 8 gradually narrows the left and right intervals and extends backward. The air cleaner 29 is arranged from the vicinity of the largest width portion of the main frame 8 to its rear end, surrounded by the left and right frame members 80, and except figure 1 Outside Figure 4 It also shows that the upper surface bulges upward compared to the left and right frame members 80.

[0045] In addition, intake ducts 29a are provided to extend forward from the left and right corners of the front portion of the air cleaner 29, respectively. In this example, the intake duct 29a extends forward so as to pass between the upper and lower circular pipes 80a and 80b of the frame member 80, and surround the left and right sides of the electrical equipment installation space S described below. The traveling wind introduced through the intake duct 29a can be smoothly supplied to the inside of the air cleaner 29, and the air suction efficiency can be improved by the traveling wind pressure.

[0046] As described above, the fuel tank 30 is arranged from above to the rear of the air cleaner 29 that bulges upward from the main frame 8 and passes only in figure 1 The box cover 31 shown by the dotted line is covered. The front ends of the fuel tank 30 and the tank cover 31 are positioned so as to substantially correspond to the front ends of the air cleaner 29. On the other hand, the rear ends extend to a position closer to the rear than the rear end of the main frame 8. The rear end of the fuel tank 30 extends to a position lower than the rear end of the main frame 8 and overlaps the front of the rear frame 10.

[0047] That is, in the present embodiment, both the air cleaner 29 and the fuel tank 30 are arranged close to the rear as a whole, and their front ends are largely separated from the head pipe 6 to the rear. With this, it is possible to ensure a large space (hereinafter, referred to as electrical component installation space S) required between both the air cleaner 29 and the fuel tank 30 and the head pipe 6. Reference Figure 4 ~ Figure 1 0 As described below, a plurality of power system electrical components such as a regulator 41, a relay box 42, and a fuse box 43 are arranged in the electrical component installation space S.

[0048] -The connection structure of the main frame and the rear frame-

[0049] In order to arrange the fuel tank 30 closer to the rear as described above, in the present embodiment, a cross member 9 having a closed cross-section structure is used in the portion connecting the main frame 8 and the rear frame 10 of the motorcycle 1. image 3 It is an enlarged view showing the connection structure of the main frame 8 and the rear frame 10. First, the left and right frame members 80 of the main frame 8 are at their respective rear ends, and the upper and lower circular pipes 80a and 80b are connected to each other by a joint member 82. The left and right joint members 82 are respectively fixed on the left and right sides of the upper part of the cross beam 9.

[0050] The beam 9 is a member in which two steel plates 9a and 9b are laminated and press-formed in the front-rear direction, and a thick square tube 9c is welded along the lower edge thereof to form a closed cross-section structure. With this structure, the cross beam 9 saves space and has a rigidity equal to or higher than that of a conventional general pipe work, and it is possible to ensure a continuous space from above to the rear end of the rear fuel tank 30.

[0051] That is, as image 3 As shown, the overall rectangular thick plate-shaped beam 9 is inclined backward and extends downward from the lower part of the rear end of the left and right frame members 80 of the main frame 8, and the spine type vehicle is welded from its rear surface to the lower part. The front part of the shelf 11. and, image 3 The rear end of the fuel tank 30 shown by the dotted line in the middle is positioned from above the cross beam 9 to the rear.

[0052] In addition, only in image 3 As shown in the figure, the rear strut portion of the spine frame 11 is provided with a support member 11c that supports the rear end portion of the fuel tank 30 so as to straddle the left and right sides thereof. The supporting member 11c also has a function as an attachment seat of the seat 13. In the space on the left side of the spine frame 11, a canister unit 33 for temporarily storing and purifying evaporated fuel is arranged near the rear end of the fuel tank 30, and behind it A battery 34 (shown in dashed lines) is also provided on the slightly upper side of the battery.

[0053] The canister unit 33 consists of the upper surface of the rectangular box-shaped canister body 33a, the hose 35 for introducing evaporated fuel from the rear end of the fuel tank 30, and the hose 35 for leading out the canister body 33a to the throttle body 28 The fuel-evaporating hose 36 is connected. A purge control valve 33b that controls the flow rate of the evaporated fuel is provided in the middle of the hose 35. Since the canister unit 33 is arranged in the vicinity of the fuel tank 30, the costly hose 35 is shortened.

[0054] -The layout of electrical equipment and wiring harness for power system-

[0055] Next, refer to Figure 4 ~ Figure 8 The layout of electrical components and wiring harnesses for the power supply system of this embodiment will be described. Figure 4 It is a diagram showing the layout of the air cleaner 29 and the electrical components of the power supply system after the fuel tank 30 and the tank cover 31 are removed. Figure 5 It is a perspective view with the air cleaner 29 further removed. also, Image 6 , Figure 7 Shows the configuration of the adjuster 41 when viewed from below and from the front, Figure 8 The overall layout of the wire harness in the motorcycle 1 is shown.

[0056] In the motorcycle 1 of the present embodiment, the air cleaner 29 and the fuel tank 30 are arranged near the rear as described above, and a large electrical equipment installation space S is secured in front of them. In addition, electrical components of the power supply system such as the regulator 41, the relay box 42, and the fuse box 43 are arranged here. In addition, an ignition switch 44 and a tipping sensor 45 are arranged.

[0057] Such as Figure 4 ~ Figure 7 As shown, on the front ends of the left and right frame members 80 of the main frame 8, a bracket 83 is overlapped and welded so as to cover each upper circular tube 80a from above, and an ignition switch is mounted on the bracket 84 arranged on the upper part. 44. Furthermore, behind the bracket 83, a horizontal tube 85 is bridged between the round tubes 80a on the upper side of the left and right frame members 80, and the relay box 42 and the fuse box 43 are mounted here.

[0058] Similarly, a horizontal pipe 86 is installed on each of the lower circular pipes 80b of the left and right frame members 80, and the adjuster 41 is attached to the horizontal pipe 86. As in Image 6 As shown in the state viewed from below, the regulator 41 is provided with a heat dissipation plate 41b on the entire housing 41a made of metal, and a mounting piece 41c extending upward after being bent from the rear edge of the housing 41a is fastened to Horizontal tube 86. Further, near the front of the adjuster 41, a bracket 87 is welded to connect the left and right down frames 81 to each other, and a cutout portion 87a is formed here so that the front surface of the adjuster 41 is exposed forward.

[0059] That is, as Figure 7 As shown, when viewed from the front of the motorcycle 1, the adjuster 41 is arranged in such a way that it is located below the lower end of the head pipe 6, and the front surface of the housing 41a extends from the cutout 87a of the bracket 87 Facing the front, the traveling wind from the front passes through the space between the head pipe 6 and the radiator 27 and directly contacts the heat sink 41b. With this, the heat dissipation from the regulator 41 can be effectively promoted by the running wind during the running of the motorcycle 1.

[0060] On the other hand, on the left side of the housing 41a of the regulator 41, such as Image 6 The coupler 41d to which the wiring harness is connected is shown, but the coupler 41d is located behind the part on the left side of the cutout 87a of the bracket 87, and this part becomes a wall, so that the traveling wind does not directly contact. Therefore, although rainwater or the like caused by the driving wind may adhere to the heat dissipation plate 41b of the regulator 41, it is possible to prevent rainwater or the like from entering the housing 41a from the coupler 41d.

[0061] As described above, the regulator 41 is arranged in the lower part of the electrical equipment installation space S, and cooling is achieved by running wind. In contrast, the relay box 42 and the fuse box 43 are arranged in the upper part of the electrical equipment installation space S. Relay box 42 in Figure 5 The center is arranged on the right side as shown by the solid line, and the fuse box 43 is arranged side by side as shown by the broken line on the left side. In addition, a tipping sensor 45 is arranged near the front of the fuse box 43.

[0062] And, by only figure 1 The electrical equipment cover 46 shown by the dotted line in the middle covers the relay box 42, the fuse box 43, and the overturn sensor 45 from above. The electrical equipment cover 46 is a resin molded product as an example, and is detachably arranged in front of the box cover 31 so as to straddle the left and right frame members 80 of the main frame 8. The electrical equipment cover 46 covers the electrical equipment arranging space S, and the left and right sides of the electrical equipment arranging space S are surrounded by the left and right frame members 80 and the intake duct 29a as described above, so as to be protected from From the influence of rain and so on.

[0063] In addition, although the details are not shown in the figure, the electrical equipment cover 46 is formed in such a shape that the upper surface and the left and right sides are continuous with the upper surface and the left and right sides of the front end of the box cover 31, respectively. That is, the electrical equipment cover 46 is integrated with the box cover 32 in appearance, and the appearance design is excellent. In addition, a recess that opens from the front to the upper side is formed in the front portion of the electrical equipment cover 46, and the upper part of the ignition switch 44 protrudes upward in a state of penetrating the bottom of the recess.

[0064] That is, as image 3 , Figure 5 As shown, the ignition switch 44 is mounted on a bracket 84 that is one level higher than the main frame 8, and extends upwards approximately parallel to the rear of the head pipe 6, and its upper end is positioned higher than the upper end of the head pipe 6. In order to make the driver easy to operate. Although the illustration is omitted, a headlamp, meters, etc. are arranged in front of the head pipe 6. In the present embodiment, the headlamps, meters, etc. can be brought close to the front side of the head pipe 6 without being hindered by the ignition switch 44, so the degree of freedom of design is high.

[0065] In this way, the ignition switch 44 is also arranged in the electrical equipment arrangement space S, so the wiring harness connecting the relay box 42 becomes very short. In addition, in the electrical equipment installation space S, the wire harness of the power supply system that connects the regulator 41, the relay box 42, and the fuse box 43 to each other may be very short. In addition, in this embodiment, the upper surface of the air cleaner 29 directly behind the electrical equipment arrangement space S is as image 3 An engine control unit 48 (hereinafter referred to as ECU 48) is provided as shown.

[0066] Unlike the regulator 41 and the fuse box 43, the ECU 48 is an electrical component of the control system, and a large current does not flow on the signal line of the control system connected to it. Therefore, each signal line of the control system is not thick, but the number of signal lines connected to the ECU 48 is relatively large, so the wiring harness that bundles these together is relatively thick. Therefore, a rectangular accommodating recess 29b for accommodating the ECU 48 is formed on the upper surface of the air cleaner 29, and as described above, there is also provided a recessed insert 29c for intensively accommodating the wire harnesses that are bundled thickly.

[0067] That is, as image 3 As shown, the upper surface of the air cleaner 29 is formed with a recessed portion 29c extending back and forth along its left side edge, and a wide communicating groove is passed between the recessed portion 29c and the accommodating recess 29b of the ECU 48 29d is connected. Furthermore, the wiring harness of the control system extending from the ECU 48 to the front and rear of the vehicle body is connected to the regulator 41, the relay box 42, and the fuse box 43 of the electrical equipment distribution space S, and the rear alternator 24 and battery 34, etc. The wire harnesses of the power supply system are assembled together to form a main wire harness 49 extending in the front-rear direction along the recessed portion 29c.

[0068] in Figure 8 The vehicle body, etc. are omitted and the layout of the overall wiring harness 50 in the motorcycle 1 is shown. Figure 8 The center left is the front of the motorcycle 1, and the right is the rear. From the electrical equipment installation space S in the front of the vehicle body to the main harness 49 near the center, the harnesses 51 and 52 of the power supply system extend between the alternator 24 and the lower battery 34 from here. Time also extends. In addition, for example, the wiring harness 53 connected to the tail lights and the winker (not shown) extends further to the rear, and for example, the car number sensor (not shown) of the front wheel 2 is connected to the headlights and the turn indicator. The wiring harness 54 connected by) etc. extends to the front of the electrical equipment installation space S.

[0069] In addition, in Figure 8 The symbol 55 shows the wiring harness connected to the not-shown horn and electric fan, and the same symbols 54 and 55 show the throttle body 28 of the engine 20 (refer to figure 1 ) And the injector (not shown), etc., and the ABS (anti-lock braking system; anti-lock braking system) unit (not shown).

[0070] From Figure 8 It can be judged that the main harness 49 extending rearward from the electrical equipment installation space S is quite thick. However, other than this, there is no such a thick wire harness. Compared with the conventional general motorcycle, the wire harness 50 as a whole is considerably reduced. Generally, a thicker wire harness increases in weight, which is not only expensive, but also difficult to bend, which makes it difficult to assemble to the vehicle body. However, in this embodiment, the thicker main wire harness 49 is only roughly the same as the main wire harness 49. The length of the frame 8 is the same.

[0071] In addition, the main harness 49, which is thick, heavy, and difficult to bend as described above, is accommodated in the recessed fitting portion 29c formed along the left edge of the upper surface of the air cleaner 29 as described above. Therefore, during the assembly work, it is only necessary to insert the socket of the main harness 49 into the coupler of the ECU 48, and install the two together on the upper surface of the air cleaner 29, and install the ECU 48 in the accommodating recess 29b. , And the main harness 49 can be installed in the recessed portion 29c. Therefore, the assembly of the main harness 49 is very easy.

[0072] Therefore, according to the motorcycle 1 of the present embodiment, as described above, both the air cleaner 29 and the fuel tank 30 are arranged at a position close to the rear, and a sufficiently large electric power is ensured between them and the head pipe 6 in front of them. The installation space S can shorten the wiring harness connecting the three power supply systems of the regulator 41, the relay box 42, and the fuse box 43 arranged in the electrical installation space S.

[0073] The ECU 48 is arranged on the upper surface of the air cleaner 29 directly behind the electrical equipment installation space S, so that the control system from the ECU 48 to the above-mentioned regulator 41, relay box 42, and fuse box 43 can also be shortened. Wiring harness. In this way, the weight and cost can be reduced by reducing the wire harness, and since the thick, heavy and difficult to bend wire harness is shortened, the workability of assembling to the motorcycle 1 can also be improved.

[0074] In addition, since the ECU 48 is accommodated in the accommodating recess 29b on the upper surface of the air cleaner 29, the resin-made air cleaner 29 functions as an electromagnetic shield and can reduce the influence of noise on the ECU 48. As described above, the shortening of the wiring harness of the control system is also beneficial for noise prevention.

[0075] In addition, even if a large electrical equipment installation space S is secured in front of the air cleaner 29 and the fuel tank 30, the entire fuel tank 30 is arranged at a position close to the rear accordingly, and the rear end is located It is located closer to the rear and lower than the rear end of the main frame 8, so the required fuel tank capacity can be secured.

[0076] -Other implementation forms-

[0077] The description of the above-mentioned embodiment is only an illustration, and the present invention does not limit its application or use. The layout of electrical components, wiring harnesses, etc. of the power supply system of the straddle-type vehicle according to the present invention can be changed, added, or deleted from the structure of the embodiment without departing from the scope of the present invention.

[0078] For example, in the above-mentioned embodiment, the regulator 41, the relay box 42, and the fuse box 43, which are electrical components of the power supply system, are arranged in the electrical component installation space S. However, it is not limited to this, as long as it is equipped with at least a relay. Two or more power system electrical components of the box 42 may be sufficient, and other electrical components such as a signal relay, an engine diagnostic device, an ECU, an ABS diagnostic device, a battery, etc. may be provided.

[0079] Furthermore, in the above-mentioned embodiment, the regulator 41 is arranged at a relatively lower part of the electrical equipment arrangement space S, and the relay box 42 and the fuse box 43 are arranged above it, but the regulator 41, the relay box 42 and the fuse The mutual positional relationship of the boxes 43 is not limited to this.

[0080] In addition, in the motorcycle 1 of the above-mentioned embodiment, the main frame 8 and the rear frame 10 are connected by the cross beam 9 of the closed cross-section structure, but this is only an example of a preferable frame structure, even if it is a frame structure other than this, As long as the rear end of the fuel tank 30 is positioned at a position closer to the rear than the rear end of the main frame 8 to ensure its capacity.

[0081] In addition, the straddle-type vehicle according to the present invention is not limited to the motorcycle 1. For example, it may be an ATV (all terrain vehicle; all terrain vehicle), a small truck, etc. The driving source is not limited to the engine 20, and may be, for example, electric motor.

[0082] Industrial applicability:

[0083] According to the present invention, wire harnesses can be reduced in a straddle-type vehicle, weight and cost can be reduced, and assembly workability is also excellent, so it is extremely meaningful to be applied to motorcycles where this effect is particularly significant.

[0084] Symbol Description:

[0085] 1 Motorcycle (straddle-type vehicle);

[0086] 6 head tube;

[0087] 8 main frame;

[0088] 9 beam;

[0089] 29 Air filter;

[0090] 29a intake duct;

[0091] 29b The accommodating recess of ECU;

[0092] 30 fuel tank;

[0093] 41 Regulator (electric equipment of power system);

[0094] 41a shell;

[0095] 41b heat sink;

[0096] 41d coupler;

[0097] 42 Relay box (electric equipment for power system);

[0098] 43 Fuse box (electrical equipment for power system);

[0099] 44 ignition switch;

[0100] 46 Removable cover;

[0101] 48 ECU (Engine Control Unit);

[0102] S Electric equipment is equipped with space.