JP4243221B2 - Motorcycle floor structure - Google Patents

Description

  The present invention relates to a motorcycle floor in which a step plate for a driver's footrest is attached to a vehicle body frame that supports an engine via an elastic support member so that vibration transmission from the engine to the step plate is blocked as much as possible. It relates to the improvement of the structure.

Such a motorcycle floor structure is already known, for example, as disclosed in Patent Document 1 below.
Japanese Utility Model Publication No.59-35287

  In the one disclosed in Patent Document 1, the entire floor is constituted by a step plate elastically supported by a vehicle body frame, and an elastic support member is provided between the step plate and a vehicle body cover that stands adjacent to the step plate. Since the gap for avoiding the interference between the step plate and the vehicle body cover is visible from the outside when it is deformed, it is difficult to say that the appearance is good. Muddy water or the like splashed up from the bottom may pass through the gap from below to contaminate the upper surface of the step plate.

  The present invention has been made in view of such circumstances. While adopting an elastic support structure of the step plate to the vehicle body frame, it is possible to improve the appearance and prevent the step plate and the floor surface from being soiled by muddy water. An object of the present invention is to provide a motorcycle floor structure.

  In order to achieve the above object, the motorcycle floor structure of the present invention has a vehicle body cover that is fixedly supported by a vehicle body frame that supports an engine and a floor member having a floor surface for a driver's footrest. The floor member is provided with an opening that opens to the floor surface, and a step plate supported by the vehicle body frame via an elastic support member is disposed in the opening, and the step plate and the opening A gap that allows elastic deformation of the elastic support member is provided between the peripheral edge, and a flexible floor mat that covers the gap between the upper surface of the step plate and the step board is laid. First feature.

  According to the present invention, in addition to the first feature, a sub-floor surface extending rearward from the rear end of the opening is inclined rearward and upward, and the crankcase of the engine is directly below the sub-floor surface. The second feature is that the bulging end portion bulging in the left-right direction is arranged.

  Furthermore, in addition to the second feature, the third feature of the present invention is that the bulging end portion accommodates a clutch attached to the crankshaft end portion of the engine.

  The clutch corresponds to a starting clutch 43 in an embodiment of the present invention described later.

  Furthermore, in addition to the second feature, the fourth feature of the present invention is that a generator driven by the crankshaft end of the engine is accommodated in the bulging end.

  According to the first feature of the present invention, the elastic support member absorbs vibration of the engine by its elasticity, so that vibration transmission from the engine to the step plate can be prevented as much as possible. At this time, the mutual interference between the step plate and the floor member can be prevented by the gap also due to the elastic deformation of the elastic support member.

  Moreover, since the floor surface of the floor member extends around the step board, a large space for the driver's footrest can be secured, which can contribute to improvement of comfort.

  In addition, the floor mat covers the floor surface of the floor member and the upper surface of the step plate, and hides the gap between the step plate and the floor member, so that the appearance can be improved and foreign matter such as scattered muddy water on the front wheels is downward. Therefore, the floor mat and the step plate and the floor surface can be prevented from being soiled. Moreover, since the floor mat is flexible, it does not hinder the relative displacement between the step plate and the floor member due to the elastic deformation of the elastic support member.

  Furthermore, according to the second feature of the present invention, the sub-floor surface can be expanded without being interfered with the left and right protruding portions of the crankcase of the engine, which can contribute to the improvement of comfort.

  Furthermore, according to the third feature of the present invention, the sub-floor surface can be expanded without being interfered with the bulging end portion of the crankcase for accommodating the clutch, which can contribute to the improvement of comfort.

  Furthermore, according to the fourth feature of the present invention, the sub-floor surface can be expanded without being interfered with the bulging end portion of the crankcase for housing the generator, which can contribute to the improvement of comfort.

  Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.

  FIG. 1 is a side view of a motorcycle according to the present invention, FIG. 2 is a side view of the motorcycle with a body cover removed, FIG. 3 is a view taken in the direction of arrow 3 in FIG. 1, and FIG. 5 is a sectional view taken along line 5-5 of FIG. 1, FIG. 6 is an exploded perspective view of a part of the vehicle body cover, FIG. 7 is a sectional view taken along line 7-7 of FIG. 3, and FIG. 9 is a sectional view taken along line 9-9 of FIG. 3, FIG. 10 is a sectional view taken along line 10-10 of FIG. 3, FIG. 11 is a sectional view taken along line 11-11 of FIG. 12 is a sectional view taken along the line 12-12, FIG. 13 is an enlarged longitudinal sectional view of the portion 13 in FIG. 11, FIG. 14 is a longitudinal side view of the air cleaner portion (cross sectional view taken along the line 14-14 in FIG. 15), and FIG. 15 is a sectional view taken along line 16-16 of FIG. 15, FIG. 17 is a side view around the oil cooler, and FIG. 18 is a sectional view taken along line 18-18 of FIG.

  In the following description, front, rear, left and right are based on a motorcycle.

  First, in FIGS. 1 to 4, a motorcycle M is vertically mounted on a body frame F, a front fork 1 that is supported by a front end of the body frame F so as to be steerable and pivotally supports a front wheel Wf. A rear fork 2 that is pivotally supported to support the rear wheel Wr 2, an engine E that is supported by the vehicle body frame F between the front wheel Wf and the rear wheel Wr, and a synthetic resin luggage box that is supported on the vehicle body frame F 3. The tandem seat 5 that can be attached to the vehicle body frame F immediately after the luggage box 3 to cover the fuel tank 4 while also serving as the lid of the fuel tank 4 and the luggage box 3, and the vehicle body frame F. A synthetic resin vehicle body cover C is provided to cover the vehicle body frame F, the engine E, the luggage box 3 and the like. The luggage box 3 functions as a support for the seat 5. The engine E is connected to a carburetor 6, an air cleaner 7 and an oil cooler 8. A steering handle 18 is connected to a handle stem extending above the front fork 1.

  The above components of the motorcycle M will be sequentially described below.

  As shown in FIGS. 2 to 4, the vehicle body frame F includes a main frame Fm having a head pipe 10 that supports the front fork 1 at the front end, and a subframe Fs that is detachably coupled to the main frame Fm. Is done. The main frame Fm includes a main pipe 11 extending rearward and downward from the head pipe 10 and a pair of left and right rear pipes 12 and 12 coupled to left and right side surfaces of the rear end portion of the main pipe 11. The rear ends of the rear pipes 12 and 12 are integrally connected to each other.

  In the vehicle body frame F, in particular, the rear half of the main pipe 11 has a rearward downward angle smaller than that of the front half and is close to a horizontal state. The rear end of the main pipe 11 ends in the vicinity of the front end of the bottom wall 3b of the luggage box 3.

  On the other hand, the rear pipes 12 and 12 are connected to the rear end portion of the main pipe 11 and, like the rear half portion thereof, from the rear frame front portion extending rearward and downward at an angle close to the horizontal, and from the rear end of the rear frame front portion. A rear frame rear portion bent upward along the front surface of the rear wheel Wr and further extending rearward, and a pair of left and right engines projecting downwards on a cross member 65 provided on the front portion of the rear frame The hangers 14 and 14 are fixed, and the engine E disposed in front of the center brackets 13 and 13 is fixedly supported by the center brackets 13 and 13 and the engine hangers 14 and 14 by a plurality of hanger bolts 30 (see FIG. 12). ).

  Further, the rear fork 2 is connected to the center brackets 13 and 13 through a horizontal pivot 15 so as to be swingable in the vertical direction, and a chain for transmitting power between the engine E and the rear wheel Wr so as to surround the rear fork 2. A transmission device 16 is provided. A rear cushion 17 is interposed between the rear end portion of the rear fork 2 and the rear pipes 12 and 12.

  The subframe Fs includes a pair of left and right L-shaped side pipes 20 and 20, a cross pipe 21 that connects the lower front ends of the side pipes 20 and 20 to each other via a connection bracket 19 (see FIG. 17), The cross pipe 21 includes a pair of left and right floor support pipes 22, 22 that are coupled to both the left and right ends of the cross pipe 21 and an intermediate portion of the left and right side pipes 20, 20 and project outward. A plurality of first support brackets 23 disposed on the front and rear sides of the upper surfaces 22 and 22 and a plurality of second support brackets 24 disposed on an intermediate portion are welded. Front connection plates 25 and 25 and rear connection plates 26 and 26 are integrally formed at the upper end portion and the rear end portion of both side pipes 20 and 20, respectively. The left and right sides of the pipe 11 are detachably coupled with bolts 31, and the left and right rear connecting plates 26, 26 are detachably coupled to the center brackets 13, 13 with bolts 32.

  The sub-frame Fs is provided with an air cleaner 7 and an oil cooler 8 before being connected to the main frame Fm, which will be described in detail later.

  As shown in FIGS. 2, 5, and 17, the engine E is coupled to a crankcase 28 that houses and supports a crankshaft 27 that is horizontally disposed with both ends directed in the left-right direction, and the crankcase 28. And a cylinder block 29 of a single-cylinder cylinder that is inclined forward in a substantially horizontal state, and is vaporized through an elbow-like intake pipe 41 on the upper surface of a cylinder head 40 joined to the end face of the cylinder block 29. A device 6 is connected. The intake pipe 41, the carburetor 6 and the air cleaner 7 constitute an intake system of the engine E. This intake system extends above and forward of the cylinder head 40.

  The crankcase 28 is formed with bulging end portions 28a and 28b projecting outward from the left and right side surfaces of the cylinder block 29 at both left and right end portions. A starting clutch 43 attached to one end is accommodated, and an outer rotor type generator 44 driven at the other end of the crankshaft 27 is accommodated in the other bulging end portion 28b. A starter motor 45 is disposed at the center of the upper surface of the crankcase 28.

  Next, in FIGS. 1 to 3 to 8, the vehicle body cover C is made of synthetic resin, and has an engine cover portion 50 with an inverted U-shaped cross section that covers the main pipe 11 and the engine E from above, and the engine cover portion 50. A pair of left and right leg shields 51, 51 connected to the front end are provided, and a pair of left and right synthetic resin floor members 52, 52 are connected to the engine cover portion 50 and the leg shields 51, 51. Each floor member 52, 52 includes a side wall portion 52a connected to the lower end of the engine cover portion 50, a floor portion 52b projecting from the lower end of the side wall 52a in the left-right outer direction, and downward from the outer end of the floor portion 52b. An engine inspection window 49 is provided on the side wall portion 52a of the right floor member 52.

  The floor surface 53 of the floor portion 52b is inclined horizontally upward from the rear end of the main floor surface 53m with the horizontal main floor surface 53m disposed in the side surface region of the cylinder block 29 in a side view. The sub-floor surface 53s extends to the left and right sides.

  As shown in FIGS. 4, 6 and 8, each floor member 52, 52 is fixed to a plurality of first support brackets 23, 23... Of the floor support pipes 22, 22 on the same side with bolts 33. . The head of the bolt 33 is accommodated in a recess 54 formed on the main floor surface 53m so that it does not protrude from the main floor surface 53m. The rear ends of the floor members 52, 52 are fixed to the rear pipes 12, 12 of the main frame Fm by bolts 34 (see FIGS. 3 and 10).

  Each of the floor members 52, 52 is provided with a rectangular opening 55 (see FIG. 6) that opens in the main floor surface 53m and is long in the front-rear direction, and the floor support pipe on the same side is provided in the opening 55. Step plates 56 elastically supported by 22 and 22 are arranged. That is, as clearly shown in FIGS. 4 and 7, the step plate 56 is attached to the plurality of second support brackets 24, 24... Of the floor support pipe 22 on the same side by the bolts 35 via the elastic support members 57. The head of the bolt 35 is accommodated in a recess 58 formed on the upper surface thereof so that it does not protrude from the upper surface of the step plate 56. The elastic support member 57 is interposed between the second support bracket 24 and the step plate 56, and is given a preload by tightening the bolt 35 penetrating through the second support bracket 24 and the step plate 56. In order to regulate the preload, A collar 59 interposed between the head of the bolt 56 and the second support bracket 24 is fitted to the shaft portion.

  The step plate 56 has a rectangular shape that is long in the front-rear direction, similar to the opening 55 that opens to the main floor surface 53m. Between the step plate 56 and the inner peripheral edge of the opening 55, an elastic support member 57 is provided. A gap g that allows elastic deformation is provided. The step plate 56 is usually arranged so that the upper surface thereof is flush with the main floor surface 53m.

  A floor mat 60 made of a flexible material such as rubber is laid on the floor surface 53 of the floor members 52, 52, that is, the main floor surface 53m, the sub-floor surface 53s, and the entire step plate 56. The gap g between the step plate 56 and the floor members 52, 52 is covered. As shown in FIG. 9, the floor mat 60 has a plurality of engagement protrusions 61, 61... Projecting from the lower surface thereof, and a plurality of engagement members provided on the step plate 56 and the floor portion 52b of the floor members 52, 52. By being elastically fitted into the stop holes 62, 62..., The step plate 56 and the floor portion 52b are held.

  Thus, even when the vibration of the engine E is transmitted to the vehicle body frame F that supports the engine E during the operation of the motorcycle M, the elastic support member 57 absorbs the vibration by the elasticity, so that the engine E Transmission of vibration from the vehicle body frame F to the step plate 56 can be prevented as much as possible. At that time, even if the elastic support member 57 is elastically deformed, the interference between the step plate 56 and the floor members 52 and 52 can be prevented by the gap g therebetween.

  Moreover, since the floor surface 53 of the floor members 52, 52 extends around the step plate 56, a wide space for a driver's footrest can be secured, which can contribute to an improvement in comfort.

  Further, the floor mat 60 covers the floor surface 53 of the floor members 52 and 52 and the upper surface of the step plate 56 while hiding the gap g between the step plate 56 and the floor members 52 and 52, so that the appearance of the motorcycle M is improved. Further, the floor mat 60 prevents foreign matter such as splashed muddy water on the front wheel Wf from passing through the gap g from below, so that the floor mat 60 as well as the step plate 56 and the floor surface 53 can be prevented from being damaged. Moreover, since the floor mat 60 is flexible, it does not hinder the relative displacement between the step plate 56 and the floor members 52 and 52 due to the elastic deformation of the elastic support member 57.

  Further, a sub-floor surface 53s extending rearward from the rear end of the opening 55 of each of the left and right floor members 52, 52 is inclined rearward and upward, and directly below the sub-floor surface 53s is a crankcase 28 of the engine E. Since the bulging end portion 28a for accommodating the start clutch 43 and the bulging end portion 28b for accommodating the outer rotor type generator 44 are respectively disposed, the bulging end portions 28a and 28b are not interfered with each other. The sub-floor surface 53s can be extended to the left and right side portions of the luggage box 3, and the driver can also bend the knee and place the foot on the sub-floor surface 53s, which can contribute to the improvement of comfort.

  Next, in FIGS. 11 to 13, the luggage box 3 is attached to the left and right rear pipes 12 and 12 of the main frame Fm so that the bottom portion is sandwiched therebetween. That is, a pair of left and right front mounting brackets 66, 66 are connected to the rear end of the main pipe 11, and the rear surface of the cross member 65 connecting the front ends of the left and right rear pipes 12, 12. A pair of left and right rear mounting brackets 67, 67 are fixed to the upper portion of the left and right sides 12, 12, and the bottom wall 3 b of the luggage box 3 is bolted to the front mounting brackets 66, 66 via elastic support members 68. Also, the flange 3a integrally projecting from the upper rear surface of the luggage box 3 is attached to the rear attachment brackets 67, 67 by bolts 37 via elastic support members 69. Further, the left and right rear pipes 12 and 12 are connected to a cross member 65 'integrally connecting the upper bending start portions thereof, and the bottom wall 3b of the luggage box 3 is disposed close to the cross member 65'. , The depth of the luggage box 3 is made as deep as possible.

  Thus, the luggage box 3 attached between the left and right rear pipes 12 and 12 is not obstructed by the rear pipes 12 and 12, and the rear side of the bottom wall 3b can be deepened to ensure a large capacity. Specifically, the bottom wall 3b of the luggage box 3 is disposed at a rearward downward inclination in the same manner as the upper surface of the rear frame 12 and 12 at the front of the rear frame extending at a rearward downward inclination near the horizontal. 3, the full-face helmet H can be stored in a rear-down posture with its lower opening face down. Thereby, the luggage box 3 can suppress an increase in the height of the seat 5 while ensuring a large capacity capable of accommodating the full-face helmet H.

  An auxiliary box 70 that projects downward and has an open upper surface is integrally formed at the center of the bottom wall 3b of the luggage box 3, and is disposed between the cross members 65 and 65 '. In this auxiliary box 70, auxiliary machines such as a battery 71 are accommodated. A lid 72 that opens and closes the auxiliary box 70 is attached to the bottom wall 3b of the luggage box 3 via a hinge pin 73, and a tip portion of the lid 72 can be fixed to the bottom wall by a screw 38. The lid 72 bulges the central portion toward the inside of the luggage box 3 in order to increase the effective volume of the auxiliary box 70, and the bulged portion 72 a is a helmet stored in the luggage box 3. It fits in the hollow part of H and does not interfere with helmet H.

  The seat 5 is attached to the upper front end portion of the luggage box 3 through a hinge pin 63 so that the open surface of the luggage box 3 can be opened and closed, and a latch 64 that holds the closed state is a rear end portion of the seat 5 and the rear pipes 12 and 12. Between.

  The luggage box 3 and the engine E are arranged so that the bottom wall 3b and the crankcase 28 are vertically adjacent to each other. Such an arrangement causes the rear end of the main pipe 11 to end near the front end of the bottom wall 3b of the luggage box 3, and the bottom wall 3b of the luggage box 3 to the rear pipes 12 and 12, rearwardly inclined rearwardly near the horizontal. It is possible to secure a wide space below the bottom wall 3b so as not to interfere with the main pipe 11 by being along the upper surface of the front portion of the frame, and to effectively use this space for the arrangement of the crankcase 28 of the engine E. It becomes. As a result, a relatively wide space can be secured between the cylinder block 29 and the front wheel Wf, so that auxiliary equipment such as the air cleaner 7 and the oil cooler 8 can be easily installed, and the wheel base can be shortened.

  14 to 16, the air cleaner 7 of the engine E is attached to the left and right front connecting plates 25, 25 of the sub-frame Fs with bolts 39, and the cylinder block 29 tilted forward substantially horizontally. It is arranged forward and upward. The case of the air cleaner 7, that is, the cleaner case 75, includes a front case half 75 a and a rear case half 75 b joined to the front case half 75 a by a plurality of screws 46. An element holder 78 that holds the cleaner element 77 is sandwiched between 75a and 75b. Both case halves 75a and 75b are made of synthetic resin, the front case half 75a is shallow in the front and back, and the rear case half 75b is deeply formed in the front and back. A pair of left and right brackets 79, 79 coupled to the left and right front connection plates 25, 25 of the subframe Fs by bolts 39 are integrally formed on the upper surface of the rear case half 75b.

  The element holder 78 is also made of synthetic resin, and includes a partition wall 78a having a seal projection 80 on the outer periphery and a vertically long rectangular holding frame 78b integrally formed at the center of the partition wall 78a. A frame trap 81 made of a punching plate covering one side of the cleaner element 77 is attached to an end surface of the rear case half 75b side of the holding frame 78b. Heat squeezed.

  The seal protrusions 80 on the outer periphery of the partition wall 78a are fitted into seal grooves 82 and 83 formed on the joint surfaces of the front and rear case halves 75a and 75b. A pair of left and right air inlet tubes 84 projecting rearward are integrally formed at the upper end of the partition wall 78a. On the other hand, a pair of left and right bulging portions 85, 85 bulging upward are formed on the upper end side of the front case half 75 a, and the left and right air inlet pipes 84 pass through the bulging portions 85, 85. Protrudes rearward and outward, and air is introduced into the front case half 75 a by these air inlet pipes 84.

  One end of a connecting tube 86 is connected to the side wall of the rear case half 75b, and the other end is connected to the carburetor 6 of the engine E. Therefore, the inside of the front case half 75 a becomes the non-purification chamber 87 and the inside of the rear case half 75 b becomes the purification chamber 88.

  In the element holder 78, the holding frame 78b protrudes from both the front and rear side surfaces of the partition wall 78a, and in particular by the left and right side walls of the holding frame 78b protruding to the unpurified chamber 87 side and the left and right side walls of the front case half 75a. , Groove-shaped air guide paths 89 and 89 extending in the vertical direction are defined, and the air inlet pipe 84 is connected to the upper ends of the air guide paths 89 and 89. Further, the respective guide paths 89, 89 communicate with the cleaner element 77 beyond the side wall of the holding frame 78b.

  The front case half 75a and the partition wall 78a are formed with guide walls 90, 90 for directing the air flow that has passed through the air inlet pipe 84 to the lower side of the air guide paths 89, 89. Each guide wall 90, 90 comprises a convex wall 90a formed on the front case half 75a and a pair of convex walls 90b, 90b formed on the partition wall 78a so as to sandwich the convex wall 90a from the left and right. Yes.

  Thus, during the operation of the engine E, during the intake stroke, outside air is first introduced into the unpurified chamber 87 from the left and right air inlet pipes 84. At that time, the air that has passed through the air inlet pipes 84 is guided to the lower side of the corresponding air guide paths 89 and 89 by the guide walls 90 and 90, and the side walls of the holding frame 78 b are moved from the entire air guide paths 89 and 89. Since the air flows over to the cleaner element 77, even if the unpurified chamber 87 is flat in the front-rear direction, the introduced air can be spread over the entire cleaner element 77 and efficiently purified.

  Moreover, the pair of left and right air guide paths 89, 89 are defined by the holding frame 78b protruding to the unpurified chamber 87 side and the left and right side walls of the front case half body 75a. No special passage member for 89 can be used, the structure can be simplified, and the unpurified chamber 87 can be sufficiently flattened, contributing to shortening the front-rear dimension of the air cleaner 7 as a whole, and being inclined forward. The layout of the air cleaner 7 in the narrow space between the front fork 1 and the main pipe 11 above the cylinder block 29 becomes easy.

  In addition, the partition 78a of the element holder 78 is integrally formed with a pair of air inlet pipes 84, 84 connected to the upper ends of the left and right air guide paths 89, 89, thereby reducing the number of parts of the air cleaner 7 and simplifying the structure. Can be achieved.

  Next, in FIGS. 2, 17, and 18, the oil cooler 8 is an air-cooling type that cools the lubricating oil of the engine E, and has a number of cooling shells 91, 91 having cooling fins 91a on the outer periphery. Are integrated into a flat shape in the front-rear direction. The oil cooler 8 is attached to upper and lower brackets 93 and 94 provided on the left and right side pipes 20 and 20 with bolts 47 via elastic support members 95, respectively. At this time, the oil cooler 8 has an upper end portion between the left and right side pipes 20 and 20 between the cylinder head 40 coupled to the cylinder block 29 in the forward inclined posture and the carburetor 6 disposed above the cylinder head 40. To face the rear, it is placed in a steep rearward leaning posture that is upward and backward. And the said cross pipe 21 is arrange | positioned so that the lower end part of this oil cooler 8 may be covered from the front.

  In addition, a louver 92 is disposed between the front wheel Wf and the sub-frame Fs so as to guide the traveling wind substantially perpendicularly to the front surface of the oil cooler 8 by being supported by the left and right side pipes 20 and 20.

  Thus, the oil cooler 8 has a steep rearward tilting posture so that the upper end portion faces between the cylinder head 40 coupled to the cylinder block 29 in the forward tilting posture and the vaporizer 6 disposed above the cylinder head 40. With this arrangement, it is possible to install a large-capacity oil cooler 8 by effectively using the narrow space between the cylinder head 40 and the front wheel Wf, thereby improving the cooling performance of the engine E and improving the motorcycle M. The overall length can be shortened, and at the same time, the required ground clearance of the oil cooler 8 can be secured.

  In addition, even when the oil cooler 8 is tilted backward, the louver 92 guides the traveling wind almost vertically to the front surface of the oil cooler 8, so that the oil cooler 8 can be well cooled.

  The oil cooler 8 is protected from interference with projections on the road surface by a cross pipe 21 that covers the lower end portion of the oil cooler 8, and the cross pipe 21 is provided between the left and right side pipes 20 and 20 and the left and right floor support pipes. Since 22 and 22 are connected, the sub-frame Fs can be effectively reinforced.

  Further, since the oil cooler 8 is attached to the sub-frame Fs that can be attached to and detached from the main frame Fm together with the air cleaner 7, the oil cooler 8 and the air cleaner 7 are attached to the sub-frame Fs before being joined to the main frame Fm. The mounting work can be easily performed without being obstructed by adjacent members such as the main frame Fm and the engine E, and the maintenance work is also easily performed with the subframe Fs separated from the main frame Fm. Therefore, assembly and maintenance are very good.

  The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention. For example, when the engine E is configured to be water-cooled, the oil cooler 8 can be replaced with a radiator.

1 is a side view of a motorcycle according to the present invention. FIG. 2 is a side view showing the motorcycle with a body cover removed. 3 is a view taken in the direction of arrow 3 in FIG. The top view which shows the sub-frame periphery. FIG. 5 is a sectional view taken along line 5-5 in FIG. The disassembled perspective view of a part of vehicle body cover. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 3. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 3. FIG. 9 is a sectional view taken along line 9-9 in FIG. 3. FIG. 10 is a sectional view taken along line 10-10 in FIG. 3; FIG. 11 is a sectional view taken along line 11-11 in FIG. 3; 12-12 sectional view taken on the line of FIG. FIG. 13 is an enlarged vertical sectional view of 13 parts in FIG. 11. FIG. 16 is a longitudinal side view of the air cleaner section (cross-sectional view taken along line 14-14 in FIG. 15). FIG. 15 is a sectional view taken along line 15-15 in FIG. 14; FIG. 16 is a sectional view taken along line 16-16 in FIG. 15; The side view around an oil cooler. FIG. 18 is a cross-sectional view taken along line 18-18 in FIG.

Explanation of symbols

C ... Body cover F ... Body frame M ... Motorcycle 27 ... Crankshaft 28 ... Crankcase 28a, 28b ... bulging end 43 ··· clutch (starting clutch)
52 ... Floor member 53 ... Floor surface 53m ... Main floor surface 53s ... Sub-floor surface 55 ... Opening 56 ...・ Step plate 57 ・ ・ ・ ・ ・ ・ Elastic support member 60 ・ ・ ・ ・ ・ ・ Floor mat

Claims (4)

  A floor member (52) having a floor surface (53) for a driver's footrest is connected to a vehicle body cover (C) fixedly supported on a vehicle body frame (F) that supports the engine (E). The floor member (52) is provided with an opening (55) that opens to the floor surface (53), and the body frame (F) is inserted into the opening (55) via an elastic support member (57). A step plate (56) to be supported is arranged, and a gap (g) allowing elastic deformation of the elastic support member (57) is provided between the step plate (56) and the inner peripheral edge of the opening (55). A motorcycle, characterized in that a flexible floor mat (60) covering the upper surface and the gap (g) is laid from the floor surface (53) to the step plate (56). Floor structure. In the motorcycle floor structure according to claim 1,
A sub-floor surface (53s) extending rearward from the rear end of the opening (55) of the floor surface (53) is inclined rearward upward, and a crank of the engine (E) is directly below the sub-floor surface (53s). A floor structure for a motorcycle, characterized in that bulging ends (28a, 28b) bulging in the left-right direction of the case (28) are arranged. In the motorcycle floor structure according to claim 2,
A floor structure for a motorcycle, wherein the bulging end portion (28a) accommodates a clutch (43) attached to an end portion of a crankshaft (27) of the engine (E). In the motorcycle floor structure according to claim 2,
The floor structure of a motorcycle, wherein the bulging end (28b) accommodates a generator (44) driven by the end of the crankshaft (27) of the engine (E).

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