CN1319527A - Motor driven two-wheel vehicle - Google Patents

Abstract

The motorcycle V includes a body frame F, an internal combustion engine 19 , and rear forks 21 and 22 . The storage box 9 having the opening 9b opened and closed by the seat 10 is located above the front sub-frames 3a, 4a and overlaps the front sub-frames 3a, 4a in plan view, and the pivot plate 17 overlaps the storage box 9 in plan view. The position extends downward, thereby reducing the left and right width of the vehicle body, narrowing the vehicle body, and making the position of the internal combustion engine 19 and the rear forks 21, 22 relative to the front and rear direction of the vehicle body frame F in front, because The internal combustion engine 19 is disposed in front of the pivot plate 17 at a position overlapping with the storage box 9 in plan view, and when the rear wheel 18 with a large diameter is used, the length of the front and rear of the vehicle body can be suppressed from becoming longer.

Description

motorcycle

The present invention relates to a motorcycle such as a saddle type, which has a storage box for storing items such as a helmet and has an opening opened and closed by a seat. Specifically, it relates to a motorcycle The mutual arrangement structure of the body frame and the storage box, etc.

In the prior art, motorcycles having storage boxes for storing helmets etc. are well known. There is a trunk for storing helmets etc. inside, and the opening is opened and closed by the seat. Furthermore, on the left and right sides of the trunk, a pair of left and right rear frames that are part of the vehicle body frame extend rearward and upward. Therefore, the width in the lateral direction of the vehicle body at the portion where the storage box is located is larger than that of the rear frame when there is only the storage box, and it is difficult to narrow the vehicle body even if the lateral width of the vehicle body is small.

In contrast, in the motorcycle disclosed in Japanese Patent Publication No. 6-33058 (hereinafter referred to as the latter), for example, the container for accommodating loads is located between the central part of the vehicle body cover and the pair of left and right frame members. The formed accommodation space is arranged above the front and up of the upright portion of the frame member, and the power unit is arranged under the rear of the upright portion. The opening of the container covered by the openable and closable lid provided at the central portion of the vehicle body cover has an opening width substantially equal to the left and right width of the frame member, so that the vehicle body does not protrude excessively, and there is no danger to the passenger. In case of any impact the openings can be formed in the earth.

Therefore, in the latter, unlike the former, since the frame member (equivalent to the former rear frame) does not pass through the side of the container (equivalent to the former trunk), the vehicle body does not move left and right on the side of the container. The direction is bulging, that is, the left and right width of the car body will not be large, which can be said to realize the narrowing of the car body.

However, in the latter, since the container is arranged in front of it with the above-mentioned upstanding portion sandwiched, and the power unit is arranged in the rear thereof, when a large-diameter rear wheel is intended to be used, the length in the front-rear direction of the vehicle body (the front-to-rear length ) will become longer, so there is room for improvement in the compactness of the car body.

The present invention is made in view of the above-mentioned problems of the prior art, and its object is to provide a motorcycle with a storage box, which has a small left and right width of the vehicle body, and adopts a Even in the case of large-diameter rear wheels, the front-to-rear length of the vehicle body can be suppressed, thereby achieving further compactness of the vehicle body.

The motorcycle according to the first technical solution of the present invention includes a vehicle body frame, an engine, and a rear fork. A pair of left and right sub-frames, the engine is arranged in front of the pivot plate, the rear fork is pivotally supported on the pivot plate and pivotally supports the rear wheel, it is characterized in that each of the above-mentioned left and right sub-frames is composed of the front sub-frame, The front end of the front sub-frame is connected to the rear of the above-mentioned main frame, the curved portion is bent upward from the rear end of the above-mentioned sub-frame, and the rear sub-frame has a The upright portion extending above the rear slope, and the storage box having an opening opened and closed by the seat are arranged above the left and right front sub-frames and overlap the left and right front sub-frames in plan view, and the pivot plate is fixed to the above-mentioned The left and right sub-frames extend downward at positions overlapping with the storage box in plan view.

According to the first technical solution, since the storage box having the opening opened and closed by the seat is arranged above the left and right front sub-frames and overlaps with the left and right front sub-frames in plan view, the two front sub-frames are not compared with each other. The ground of the containment box juts out to the side. Moreover, since the engine is arranged in front of it, and the pivot plate pivotally supporting the rear fork of the rear wheel is fixed on the left and right sub-frames, and the position overlapping with the storage box extends downward when viewed from above, it is possible to move the relative vehicle body The positions of the front-rear direction of the engine and the rear fork of the frame are set at positions more forward than the above-mentioned prior art. Since the engine is disposed in front of the pivot plate at a position overlapping the storage box in plan view, it is possible to suppress the front-rear length of the vehicle body from becoming longer when the rear wheels with large diameters are used.

As a result, the two-wheeled motor vehicle can reduce the left and right width of the vehicle body and narrow the vehicle body on the basis of being equipped with a storage box with an opening that is opened and closed by the seat. Even with the rear wheels, the front and rear length of the car body can be suppressed, and further compactness of the car body can be realized. Therefore, while suppressing the lengthening of the front-rear length of the vehicle body, a large-diameter rear wheel can be used, thereby improving driving performance.

The motorcycle according to the second technical aspect of the present invention is the motorcycle according to the first technical aspect, wherein the pivot plate is fixed to the left and right front sub-frames, and the left and right front sub-frames The outer left and right width of the fixed portion of the frame to which the pivot plate is fixed is approximately the minimum width of the outer left and right widths of the left and right front sub-frames at the portion overlapping the storage box in plan view.

According to the second technical solution, since the pivot plate is fixed to the portion of the left and right front sub-frames where the left and right width is the smallest, it can be configured as a pivot plate with a relatively narrow left and right width that matches the left and right width of the fixing portion. , will not use the pivot plate with large left and right width or the pivot plate fixed on the frame beam with large left and right width connected with the two sub-frames. As a result, in addition to the effects of the invention of the first claim, the required rigidity can be secured while reducing the weight of the vehicle body.

A motorcycle according to a third aspect of the present invention is the motorcycle according to the first aspect or the second aspect, wherein the left and right rear sub-frames are behind the left and right standing portions. Each has a widened portion having an inner lateral width greater than that of the left and right front sub-frames, and a fuel tank is arranged between the left and right widened portions.

According to the third technical solution, since the fuel tank is disposed between the widened portions of the left and right rear sub-frames, the vehicle height of the rear portion of the vehicle body can be lowered, and since the left and right widened portions of the widened portion are between the sub-frames, The width is large so that a sufficient capacity of the fuel tank can be ensured.

As a result, in addition to the effects of the invention of the first technical solution or the second technical solution, the vehicle height at the rear of the vehicle body can be lowered on the basis of ensuring a sufficient capacity of the fuel tank, which can contribute to the compactness of the body.

Fig. 1 is a left side view of a saddle-type motorcycle according to an embodiment of the present invention.

Fig. 2 is a plan view of main parts of the motorcycle of Fig. 1 .

Fig. 3 is a rear view of main parts of the motorcycle of Fig. 1, centering on a body frame, a storage box, and a pivot plate.

FIG. 4 is an enlarged view of main parts of FIG. 1 centering on the vehicle body frame, storage box, and pivot plate. FIG. 5 is an enlarged view of main parts of FIG. 2 centering on the vehicle body frame, storage box, and pivot plate.

Fig. 6 is an enlarged view of main parts of Fig. 2 centering on the mounting support plate.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6 .

Referring to FIG. 1 which is a left side view of a saddle-type motorcycle V using the present invention and FIG. 2 which is a top view of its main parts, its vehicle body frame F includes: a head pipe 1 at the front end; A single tubular main frame 2 with approximately the same outer diameter extending obliquely downward from the lower part, and a pair of left and right tubular sub-frames with approximately the same outer diameter extending backwards in two strands from the left and right sides of the rear part of the main frame 2 3, 4.

In this specification, "front, rear, left, and right" means front, rear, left, and right of the motorcycle V. As shown in FIG.

Each sub-frame 3, 4 is made of front sub-frame 3a, 4a, lower bent portion 3b, 4b, rear sub-frame 3c, 4c, wherein front sub-frame 3a, 4a is welded on the rear portion of main frame 2 from the front end edge The main frame 2 is composed of inclined portions 3a1, 4a1 extending obliquely downward, and horizontal portions 3a2, 4a2 extending substantially horizontally rearward from the rear ends of the inclined portions 3a1, 4a1. In addition, the lower curved parts 3b, 4b are bent upward from the rear ends of the horizontal parts 3a2, 4a2, and the rear sub-frames 3c, 4c are straight lines obliquely upward from the rear ends (or upper ends) of the lower curved parts 3b, 4b. The raised portions 3c1, 4c1 extending in a shape, the upper curved portions 3c2, 4c2 bent rearward in the horizontal direction from the rear ends (or upper ends) of the raised portions 3c1, 4c1, and the upper curved portions 3c2, 4c2 from the upper curved portions 3c2, 4c2 The rear end is constituted by widened portions 3c3, 4c3 extending rearward and obliquely upward with a gentler inclination than the inclination of the standing portions 3c1, 4c1. As a result, the overall shape of the front sub-frames 3a, 4a, the lower curved portions 3b, 4b, and the rising portions 3c1, 4c1 is substantially L-shaped.

The vehicle body frame F is also provided with three transverse pipes located between the left and right sub-frames 3, 4 and whose respective left and right ends are welded to the two sub-frames 3, 4, respectively. These horizontal tubes are sequentially composed of a front horizontal tube 5, a central horizontal tube 6, and a rear horizontal tube 7 from the front. The said central horizontal pipe 6 is provided in the approximate center of the upright part 3c1, 4c1, and the said rear horizontal pipe 7 is provided in the rear end part of the widened part 3c3, 4c3.

The vehicle body frame F is covered by a vehicle body cover 8 . The cover portion of the vehicle body cover 8 covering the sub-frames 3, 4 has an opening 8a opened upward above the left and right sub-frames 3, 4, and a storage box for storing items such as a helmet is arranged inside the cover portion. 9. The opening 8a is covered openly and closably by the seat, and the opening 9b opened above the storage box 9 is also covered by the seat 10 together with the opening 8a of the vehicle body cover 8. The seat 10 is pivotally supported by a pivot support portion 9 a whose front end portion is provided on an upper front end portion of the storage box 9 . Additionally the seat 10 is locked or unlocked by a well-known seat locking mechanism having a hook (not shown) that engages a ring 10 a provided under the rear end of the seat 10 . The steering shaft 11 is rotatably supported on the head pipe 1, a top bridge 12 is fixed at its upper end, and a bottom bridge 13 is fixed at its lower end. And the upper end portion of a pair of front forks 14,14 combined with the top bridge 12 and the bottom bridge 13 is combined with the operating direction handle 15, and the front wheel 16 is pivotally supported at the lower end portion.

In addition, a pivot plate 17 fixed to both front sub-frames 3a, 4a is provided extending downward from the front sub-frames 3a, 4a, and a pair of left and right rear forks 21, 22 are supported on the pivot plate 17. A pair of left and right rear forks 21 and 22 pivotally support the power unit P and the rear wheel 18 . That is, the rear end portion of the transmission case 20 integrally formed with the crankcase 19a of the internal combustion engine 19 as the engine is pivotally supported by the first pivot support portion 17a of the pivot plate 17, and the internal combustion engine 19 and the transmission case 20 of the power unit P are formed. The speed changer (not shown) is arrange|positioned so that it may extend forward from the 1st pivot support part 17a. The front ends of the left and right rear forks 21, 22 are pivotally supported by the second pivot support portion 17b of the pivot plate 17, and the rear ends of the two rear forks 21, 22 pivotally support the rear wheel 18. The suspension members 23 and 24 are respectively supported, and the left and right pair of rear suspension members 23 and 24 are pivotally supported by the supports welded to the left and right upper bending parts 3c2 and 4c2. Therefore, the rear wheel 18 is free to swing vertically about the second pivot support portion 17b.

The internal combustion engine 19 is a four-stroke single-cylinder internal combustion engine of a spark ignition type. It is successively combined with a cylinder 19b, a cylinder head 19c and a cylinder head cover (not shown), which are freely slidably fitted by a piston (not shown), and is fixed. The air taken in by the air filter 25 on the main frame 2 is mixed with the fuel through the gasifier 26, and the formed mixture passes through the intake pipe 27 and passes through the intake port and the intake valve provided on the cylinder head 19c supply and combustion chamber. The combusted exhaust gas passes through an exhaust valve and an exhaust port provided on the cylinder head 19c and is discharged into the atmosphere through an exhaust pipe 28 from a muffler 29 .

The power of the internal combustion engine 19 is transmitted to the rear wheel 18 through a double reduction mechanism, which consists of a drive sprocket 31, a driven sprocket 32 and a drive chain 33 hanging on the drive sprocket 31 and the driven sprocket 32. The drive sprocket 31 rotates integrally with the output shaft 30 of the transmission, and the driven sprocket 32 rotates integrally with the axle shaft of the rear wheel 18 . In addition, this secondary reduction mechanism also constitutes a part of the power plant P. As shown in FIG.

Referring to FIGS. 3 to 5 , the mutual arrangement of the main frame 2 , the left and right sub-frames 3 , 4 , the storage box 9 , the pivot plate 17 , and the fuel tank 37 will be further described. The storage box 9 is disposed above both the front sub-frames 3a, 4a and in front of the two standing portions 3c1, 4c1, and is fixed to the left and right sub-frames 3, 4 in the form described below. That is, the substantially flat bottom wall 9c of the storage box is bolted to a support plate 34 via a pair of left and right rubber washers B1, B1, and the support plate 34 is arranged across the horizontal portions of the left and right front sub-frames 3a, 4a The upper part of 3a2, 4a2. The support plate 34 is formed of a flat plate whose left and right end portions are welded to the horizontal portions 3a2, 4a2.

As shown in Figures 1 and 3, the rear wall 9d of the storage box 9 has a left wall portion 9d1 and a right wall portion 9d2 extending approximately along the erected portions 3c1, 4c1 in front of the two erected portions 3c1, 4c1. The left and right mounting steps 9d11, 9d21 above the left wall portion 9d1 and the right wall portion 9d2 are fixed to the left and right mounting support plates 35, 36 by bolts through a pair of rubber washers B2, B2. Above, the installation support plates 35, 36 are welded to the upper parts of the upper curved portions 3c2, 4c2, respectively.

In addition, as shown in FIGS. 4 and 5 , the storage box 9 is connected to the rear of the inclined portions 3a1, 4a1 of the left and right front sub-frames 3a, 4a, the horizontal portions 3a2, 4a2, and the left and right downward curved portions 3b, 4b in plan view. The front portions of the two front sub-frames 3a, 4a overlap with the storage box 9 and have an outer left and right width W2 smaller than the maximum left and right direction width of the storage box 9, that is, the maximum left and right width W1. In particular, the lateral width W2 on the outside of the horizontal portions 3a2 and 4a2 is slightly smaller than the lateral width W4 of the bottom wall 9c of the storage box 9 .

Referring to Fig. 1, Fig. 3 and Fig. 4, the rear wall 9d of the storage box 9 has between the left wall portion 9d1 and the right wall portion 9d2 and between the left and right upstanding portions 3c1, 4c1 and the left and right upper curved portions 3c2, 4c2. Between the central wall portion 9d3. On the upper portion of the central wall portion 9d3, a protruding portion protruding rearward is formed above the central horizontal pipe 6 and between the upper bent portions 3c2, 4c2, and the battery housing chamber 38 is formed by this protruding portion.

That is, the bottom wall 38a of the battery storage chamber 38 is constituted by the stepped portion 9d31 of the central wall portion 9d3, and a front wall 38d is formed at the front end portion of the bottom wall 38a. Extends between them and extends upward from the bottom wall 38a, and partially covers the front opening of the battery storage chamber 38 from below. In addition, the front end of the rear wheel 18 is provided directly below the bottom wall 38a (see FIG. 2 ), and the front end of the bottom wall 38a and the front end of the rear wheel 18 are located at substantially the same position in the front-rear direction.

The cover 39 covering the opening portion opened forward and upward above the front wall 38d in the battery storage chamber 38 is composed of a plate-shaped member having a substantially L-shaped section in the front-rear direction. The pivot support portion 38a1 is pivotally supported by the pivot support portion 38a1 formed at the front end portion of the bottom wall 38a at a position slightly forward of the front wall. At the rear end of the upper part of the cover 39, a coupling claw 39a is provided, and the coupling claw 39a is inserted into a gap 38e1 formed in the rear wall 38e of the battery housing chamber 38 for coupling, and the coupling with 38e1 is released by elastically deforming the coupling claw 39a. . Opening of the cover 39 is prevented by engagement of the engagement claw 39a and the slit 38e1. In this state, the battery 40 is prevented from moving forward and backward by the front wall 38d and the rear wall 38e, from moving left and right by the left and right side walls 38b, 38c, and from moving up and down by the bottom wall 38a and the cover 39. In this way, since the battery storage chamber 38 is formed inside the storage box 9, the effect of preventing the theft of the battery 40 is large, and when the battery 40 is replaced, the front and the top of the battery storage chamber 38 are opened by opening the cover 39, so that it can be easily taken out. and install the battery 40 .

In addition, the pivot plate 17 made of a plate is arranged across the left and right front sub-frames 3a, 4a, and the pair of left and right side portions 17c, 17d have an inner left-right width W3 approximately equal to that of the horizontal portions 3a2, 4a2. and extend downward, and the upper ends of the side portions 17c, 17d are fixed to the horizontal portions 3a2, 4a2 and the inclined portions 3a1, 4a1 by welding, respectively. The rear portion 17e of the pivot plate 17 is disposed between the two horizontal portions 3a2, 4a2 at the rear ends of the respective side portions 17c, 17d. And this rear part 17e is formed by welding the rear part piece formed by bending the plate material of each side part 17c, 17d substantially at right angles.

Each side part 17c, 17d comprised in substantially L-shape by the side view from the left-right direction is comprised from hanging down part 17c1, 17d1, and horizontal part 17c2, 17d2. The hanging parts 17c1 and 17d1 are located directly below the bottom wall 9c of the storage box 9, that is, at positions overlapping the bottom wall 9c in plan view, and extend long and downward from the horizontal parts 17c2 and 17d2. The first fixing portion 3a21, 4a21 extends along the front sub-frame 3a, 4a to the front end of the inclined portion 3a1, 4a1. And the rear part of this horizontal part 17c2, 17d2 extends below the bottom wall 9c of the storage box 9, ie, the position overlapped with the bottom wall 9c in planar view similarly to the hanging part 17c1, 17d1. The parts where the pivot plate 17 is fixed in the front sub-frames 3a, 4a are the first fixing parts 3a21, 4a21, the second fixing parts 3a11, 4a11, and the third fixing parts 3a12, 4a12. The first fixing parts 3a21, 4a21 The second fixing part 3a11, 4a11 is used to fix the rear of the horizontal part 17c2, 17d2 in the inclined part 3a1, 4a1. The front upper end of the rear hanger 48 mentioned above, the third fixing part 3a12, 4a12 is used to fix the rear upper end of the rear hanger 48.

The two hanging parts 17c1, 17d1 are provided with a second pivot support part 17b, the second pivot supporting part 17b is fixed at approximately the center position in the vertical direction of the two hanging parts 17c1, 17d1, and has a pivot supporting the left and right sides extending in the left-right direction. The pivot 41 of the front end of the rear fork 21,22. The pivot 43 and the stop shaft 45 of the brake pedal 44 (refer to FIG. 2 ) are respectively fixed to the lower ends of the two hanging parts 17c1 and 17d1. The pivot 43 supports the main bracket 42 freely and swingably. Between the two pivotal support portions 17b, the pivotal shaft 41 and the stop shaft 45, the first pivotal support portion 17a passing through the pivotal shaft 46 at the front ends of the hanging portions 17c1, 17d1. Therefore, the second pivot support portion 17b is located directly below the bottom wall 9c of the storage box 9, is provided at a position overlapping the bottom wall 9c of the storage box 9 in plan view, and is located in front of the standing portions 3c1, 4c1. Therefore, by arranging the storage box 9 directly above the horizontal part 3a2, 4a2, and disposing the two hanging parts 17c1, 17d1 and the second pivot support part 17b directly below it, it is also possible to use the large-diameter rear wheel 18. The length in the front-rear direction of the vehicle body, that is, the length in the front-rear length is suppressed.

Further, the front ends of the horizontal parts 17c2 and 17d2 of the pivot plate 17 form a rear hanger 48 through which a pivot 47 extending in the left-right direction and pivotally supporting the upper part of the crankcase 19a of the internal combustion engine 19 is inserted. In addition, the upper part of the cylinder 19b extending obliquely upward from the crankcase 19a is pivotally supported on the pivot 50, and the pivot 50 is inserted into the front hanger 49 welded to the main frame 2, and includes the internal combustion engine 19 and the transmission. The power unit P is supported by the vehicle body frame F via the front hanger 49 , the rear hanger 48 and the hanging parts 17c1 and 17d1 .

However, as shown in FIG. 5 , the lateral width W2 outside the two horizontal portions 3a2, 4a2 overlapping with the storage box 9 in a plan view extends substantially parallel to the front-rear direction, and, as mentioned above, is smaller than the bottom wall 9c of the storage box 9. The left-right width W4 is slightly smaller, and becomes the minimum left-right width at the portion overlapping with the storage box 9 . Therefore, because the pivot plate 17 is fixed on the two horizontal portions 3a2, 4a2 with the smallest left-right width, by directly fixing the pivot plate 17 on the two front sub-frames 3a, 4a, it can be configured as a pivot with a relatively narrow left-right width. The shaft plate 17 can ensure the necessary rigidity while reducing the weight of the vehicle body.

On the other hand, as shown in FIG. 1 and FIG. 2, the left and right widths of the left and right sub-frames 3, 4 gradually increase from the lower curved portions 3b, 4b through the erected portions 3c1, 4c1 to the upper curved portions 3c2, 4c2. The rear ends of the upper curved portions 3c2, 4c2 have the maximum lateral width, and the inner lateral widths of the widened portions 3c3, 4c3 of the rear sub-frames 3c, 4c following the rear ends of the upper curved portions 3c2, 4c2 are wider than the front sub-frames 3a, 4c3. 4a has a large left-right width W3 on the inner side, and a fuel tank 37 is disposed below the seat 10 between the widened portions 3c3 and 4c3 and hidden in the seat 10 . Therefore, left and right widened portions 3c3, 4c3 are provided on the left and right sides of the fuel tank 37, respectively. Moreover, the fuel tank 37 is combined with the mounting pieces 35, 36 with the mounting steps 9d11, 9d21 (refer to FIG. 5 ) of the storage box 9 through the left and right mounting flanges 37a, 37b in the front of the fuel tank 37, and the mounting pieces 35, 36 at the rear. The attachment flanges 37c, 37d are fixed to the left and right sub-frames 3, 4 by bolting rubber washers B3, B3 to the upper portions of the rear ends of the widened portions 3c3, 4c3.

The internal combustion engine 19 has a capacity discharge type ignition device (CDI), and a CDI unit 51 containing a capacitor or a charge and discharge control circuit, etc. The support plate 53 is welded to the front vicinity of the storage box, that is, the upper part of the main frame 2 . Thereby, components can be arrange|positioned effectively using the space formed in front of the storage box 9. As shown in FIG.

As shown in Fig. 1 and Fig. 2, the step 54 is arranged slightly below the crankshaft 19d and the output shaft 30 in the approximate center of the front-rear direction of the crankshaft 19d and the output shaft 30, and is arranged near the front end of the storage box 9 and the inclined parts of the front sub-frames 3a, 4a. Roughly lead vertically below 3a1, 4a1. In this vicinity, the outer side-to-side width W2 of the front sub-frames 3a, 4a becomes approximately the minimum side-to-side width, and since it is smaller than the maximum side-to-side width W1 of the storage box 9, the driver can move without opening his legs too much despite the storage box 9. Place your feet on the step 54 under conditions.

The action and effect of the embodiment constructed as above will be described below.

The storage box 9 is positioned above the left and right front sub-frames 3a, 4a and overlaps with the left and right front sub-frames 3a, 4a in a plan view, so the two front sub-frames 3a, 4a will not be larger than the storage box 9. Since the sides protrude, the vehicle body cover 8 does not protrude greatly on the left and right sides of the storage box 9 . Furthermore, the hanging parts 17c1, 17d1 of the pivot plate 17 are positioned to overlap the storage box 9 in a plan view, and the internal combustion engine 19 is arranged in front of the hanging parts 17c1, 17d1, and the rear forks 21, 22 are arranged at a lower position than the left and right sub-frames 3, The positions further forward of the upright portions 3c1, 4c1 of the pivot plate 17 are pivotally supported by the second pivot support portions 17b of the hanging portions 17c1, 17d1 of the pivot plate 17, so that the position of the rear fork 22 relative to the vehicle body frame F in the front-rear direction can be adjusted. In front than the prior art, especially since the internal combustion engine 19 is arranged in front of the hanging parts 17c1, 17d1 which overlap with the storage box 9 in a plan view, it is also possible to restrain the vehicle when the rear wheel 18 with a large diameter is adopted. The front and rear length of the body becomes longer. Furthermore, in this embodiment, the front-rear length of the vehicle body can be such that the front end of the rear wheel 18 is disposed at the front end of the bottom wall of the battery storage chamber 38 formed on the rear wall 9d of the storage box.

As a result, the two-wheeled motor vehicle not only includes the storage box 9 having the opening 9b opened and closed by the seat 10, but also reduces the left and right width of the vehicle body to narrow the vehicle body, and adopts a rear wheel with a large diameter. At 18 o'clock, the front and rear length of the car body can also be suppressed from becoming longer, and the car body can be further compacted. Therefore, the large-diameter rear wheel 18 can be employed while suppressing the lengthening of the front and rear of the vehicle body, and the driving performance can be improved.

Because the pivot plate 17 is fixed on the outer sides of the left and right front sub-frames 3a, 4a in the portion where the storage box 9 overlaps with the left and right front sub-frames 3a, 4a in a plan view, the horizontal parts 3a2, 4a2 and the inclined parts 3a1 whose left and right widths are the minimum width , 4a1 on the first to third fixing parts 3a21, 4a21, 3a11, 4a11, 3a12, 4a12, so it can be made into a relatively narrow left and right width consistent with the left and right widths of the fixing parts 3a21, 4a21, 3a11, 4a11, 3a12, 4a12 The pivot plate 17 of width can not use the large pivot plate of left and right width or the pivot plate that is fixed on the large vehicle frame beam of left and right width that is connected with two secondary frames 3,4. As a result, not only can the weight of the vehicle body be reduced, but also necessary rigidity can be ensured.

Because the fuel tank 37 is arranged between the widened portions 3c3, 4c3 of the left and right rear sub-frames 3c, 4c, the vehicle height at the rear of the vehicle body can be lowered. Since 3c3 and 4c3 have a wide left-right width, sufficient capacity of the fuel tank 37 can be ensured. As a result, the vehicle height of the rear portion of the vehicle body can be reduced while ensuring a sufficient capacity of the fuel tank 37 , which contributes to downsizing of the vehicle body.

Since the pivot plate 17 is provided with the first and second pivot bearings 17a, 17b, the pivot 43 of the main bracket 42, the stop shaft 45 of the brake pedal 44 and the rear hanger 48, so the pivots of each pivot can be The compact arrangement can reduce the number of plates supporting those pivots, contributing to weight reduction. Further weight reduction can be achieved by forming the pivot plate 17 from a sheet material.

Since the internal combustion engine 19 and the transmission are supported on the vehicle body frame by the front hanger 49 fixed on the main frame 2, the rear hanger 48 of the pivot plate 17 fixed on the subframe 3, 4 and the first pivot support part 17a On F, the power unit P is supported by the sub-frames 3 and 4 and the main frame 2 connected to the head pipe 1 in a shared manner. As a result, the power unit P can be located in front of the vehicle body, and the front-rear length of the vehicle body can be suppressed. Compared with the case where only the power unit P is supported by the main frame 2 in order to suppress the front-rear length of the vehicle body, it can be used more efficiently. The strength and rigidity of the main bracket 2 are small, so that the vehicle body can be reduced in weight.

In the above embodiment, the rear hanger 48 is formed integrally with the pivot plate 17, but the rear hanger 48 may be provided separately from the pivot plate. In addition, the motorcycle V is a saddle-type motorcycle, but may be a scooter-type motorcycle.

Claims (3)

1. two-wheeled, comprise the car body framework, driving engine and back vent, this car body framework has the secondary framework of main truss that pipe from the beginning extends to the below of retreading and the pair of right and left of rearward extending from the rear portion of this main truss, this engine configurations is in the place ahead of pivot plate, this back vent pivot is bearing on this pivot plate and axle is supporting trailing wheel, it is characterized in that, the secondary framework of about above-mentioned each is by preceding secondary framework, curve, the secondary framework in back constitutes, should be connected with the rear portion of above-mentioned main truss by preceding its front end of secondary framework, this curve is crooked upward from the rear end of above-mentioned secondary framework, the secondary framework in this back has from the rear end of this curve the rising portions that oblique upper backward extends, have by the peristome of seat open and close accommodate case be arranged on about this before the top of secondary framework, in overlooking with this about before secondary framework overlapping, above-mentioned pivot plate be fixed on above-mentioned about on the secondary framework, in overlooking, extend downwards with the above-mentioned case position overlapped of accommodating.

2. as claimed in claim 1 two-wheeled, it is characterized in that, above-mentioned pivot plate is fixed on the preceding secondary framework about above-mentioned, the left and right sides, the outside width of fixing the fixed part of this pivot plate in the preceding secondary framework about this become overlook in above-mentioned basic minimum width of accommodating the left and right sides, the outside width of the preceding secondary framework about this of the overlapping part place of case.

3. as claimed in claim 1 or 2 two-wheeled, it is characterized in that, the rear of the rising portions of back secondary framework about it about above-mentioned has the widening portion of the formation inboard left and right sides width bigger than the inboard left and right sides width of the preceding secondary framework about above-mentioned respectively, is disposing Fuel Tank between this left and right sides widening portion.

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