JP2003306183A - Scooter type motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scooter type motorcycle having a floor step with a center tunnel structure, of which the periphery of an engine can be easily maintained and necessary strength can be secured with restraining increasing of number of part items and manufacturing costs. <P>SOLUTION: The floor step F arranged throughout a lower part side of a seat 1 for riding to a front wheel 2 side is constituted of right and left pair of step parts 4 for placing legs and a tunnel portion T covering the engine E between both the step parts so as to stride the engine. The tunnel portion T is constituted in a dual structure of an inside tunnel 31 integrally provided to the step parts and an outside tunnel 34 detachably overlapping the inside tunnel 31. A plurality of maintenance holes K1, K2, K3, K4 covered by the outside tunnel 34 is formed on the inside tunnel 31. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor step which extends from the lower side of a passenger seat to the front wheel side, and which is in a state of straddling a pair of right and left step portions for foot placement and an engine between both step portions. The present invention relates to a scooter type motorcycle including a covering tunnel portion.

[0002]

2. Description of the Related Art For example, in a scooter type motorcycle such as a large displacement vehicle equipped with a frontward-moving engine which is nearly horizontal, the floor step as described above is performed because the engine is arranged between the front wheels and the riding seat. It has a tunnel structure. The floor step is generally made of a resin material such as polypropylene (PP), and a tunnel portion is provided with a maintenance hole and a lid for maintenance of the engine. The larger the maintenance hole, the easier it is to maintain, but since riders sometimes put luggage on the tunnel and drive it, the maintenance holes and lids have been conventionally used to prevent the strength of the tunnel from decreasing. It was small.

[0003]

However, since the engine-related maintenance covers many items such as idling adjustment, engine oil replenishment and replacement, tappet adjustment, and cooling water replenishment, the above-mentioned conventional configuration can handle each item. Therefore, a large number of maintenance holes and lids must be provided, and as a result, the number of resin materials increases, and in addition, it is necessary to construct a reinforcing structure that does not reduce the strength of the lid and members around the lid. There has been a problem that it becomes complicated and looks bad.

As a means for solving this problem, after a plurality of maintenance holes are collectively formed into a large hole,
It may be possible to reinforce the structure around the maintenance hole. In other words, simply increasing the size of the maintenance hole or lid will make
Is deformed, etc., the alignment of the resin material forming the tunnel portion and the large lid is broken, and a gap is created to make the appearance unpleasant.Therefore, a mounting stay for the large lid is provided on the body frame, A metal reinforcing frame may be integrally provided on the back side of the large lid, or the thickness of the large lid may be increased. However, according to this means, although the number of lids is reduced, the number of parts around the vehicle body frame is increased and the structure of the large lid is complicated, so that the manufacturing cost is increased.

By the way, in the above-mentioned scooter type motorcycle, the front leg shield located at the front wheel portion and the rear leg shield (or footboard) located below the riding seat are connected to each other to form a rear portion of the front leg shield. There is a model that forms the floor step of the center tunnel structure with the front part of the rear leg shield (this structure is because of the mold forming convenience that the mold cannot be made too large). By applying a structure with a large maintenance hole and large lid to such a model, and making the tunnel part covering the engine straddle into a single removable large lid for maintenance, the front leg shield, large lid, It is a structure that combines three members made of a large resin material called a rear leg shield. It is often very difficult to align the end faces of multiple large resin materials, align curved surface lines, and perform end face processing (processing to make the end faces of the resin material invisible) as desired. It is known that, in the structure in which three members of a large resin material are combined as described above, as compared with the structure in which two members are combined, the manufacturing error of the members is accumulated and the above-mentioned alignment becomes more difficult and It will be difficult to secure.

The present invention has been made in view of the above situation, and an object thereof is to provide a scooter type motorcycle having a floor step of a center tunnel structure, while suppressing an increase in the number of parts and an increase in manufacturing cost. The purpose is to provide a scooter-type motorcycle that allows easy maintenance around the engine and ensures the required strength.

[0007]

According to a characteristic configuration of the present invention, as described in claim 1, a floor step provided from the lower side of the riding seat to the front wheel side is provided for a pair of left and right feet. What is claimed is: 1. A scooter-type motorcycle comprising a step portion and a tunnel portion covering the engine between the step portions, wherein the tunnel portion is an inner tunnel integrally provided in the step portion, and an inner tunnel of the inner tunnel. It has a double structure with an outer tunnel which is detachably superposed on the tunnel, and a plurality of maintenance holes covered by the outer tunnel are formed in the inner tunnel.

Further, as described in claim 2, in the structure of claim 1, the floor base including the step portion and the inner tunnel is provided with a front split floor base and a rear split floor base which are connected to each other. It is composed of

Further, as described in claim 3, in the structure of claim 1 or 2, a drain groove along the front-rear direction and a liquid entering the drain groove are provided at the lower end of the vertical wall of the inner tunnel. In addition to forming a drainage part for discharging to the outside, a water guiding part is formed on the inner surface of the outer tunnel for guiding the liquid flowing down along the inner surface to the drainage groove.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1, 2 and 3 show a scooter type motorcycle. In this motorcycle, a polypropylene floor step F is arranged from a lower side of a two-seater riding seat 1 composed of a front seat portion 1a and a rear seat portion 1b to a front wheel 2 side, and a front portion covering a steering portion is covered. The large scooter is provided with a cover 3 and a frame cover 4 extending from below the seat 1 to the rear. In addition to the front wheels 2 and the front cover 3, a steering wheel 6, a windscreen 7, a pair of left and right headlights 8, a pair of left and right rearview mirrors 9, a front fender 10, etc. are provided on the front portion of the vehicle body, and the rear portion of the vehicle body is provided. In addition to the riding seat 1 and the frame cover 4, a rear carrier 11, a backrest 12, a rear fender 13, a silencer 14, rear wheels 15 and the like are provided. The front wheel 2 is provided with a disc type braking device 5.

The frame cover 4 is used for the passenger seat 1
Side covers 54 provided on the left and right below, a lower cover 55, a rear center cover 56, and a rear cover.
The rear frame cover is composed of the fender 13. In addition, the center stand 1
6, side stand 17, side leg shield 43,
44 and the like are provided. Reference numeral 29 is a front fork, and 30 is a rear cushion unit.

As shown in FIGS. 5 and 6, a power unit U is provided between the front and rear wheels at the bottom of the vehicle body. The power unit U is provided with a transmission case 19 having a belt continuously variable transmission mechanism (not shown) incorporated therein, and is provided with an engine E including a cylinder 20 tilted substantially horizontally and forward, a cylinder head 21, a head cover 22, and the like. Installation, mission case 1
Transmission case 2 for transmitting output rotation from 9 to rear wheel 15
3, a fuel supply device 24 and the like are provided. A radiator 26 is arranged in front of the head cover 22, and a pair of supply / discharge hoses 28 that are connected for communication with a water pump 27 and the like are provided. 25 is an oil filter.

Next, the structure of the floor step F will be described in detail. [Overall Structure of Floor Step F] As shown in FIGS. 4 and 5, the floor step F includes a front box portion 39 provided with left and right leg shields 39b and a central box portion 39c, and a pair of left and right stepping steps. It comprises a section S, a tunnel section T covering the engine E between the step sections S so as to straddle the engine E, and a footboard 42 having a rear footrest surface 41 for a pillion rider.

The tunnel portion T is provided with the step portion S and has a downward U-shaped cross-section. The inner tunnel 31 has a downward cross-section U which is detachably overlapped with the inner tunnel 31.
It is configured in a double structure with the letter-shaped outer tunnel 34.
The outer tunnel 34 is a lid that covers the maintenance hole as described later, and will be referred to as “maintenance lid 3” below.
4 ”. The left and right step portions S and the inner tunnel 31 constitute a floor base 32. The structure of the floor base 32 is as follows.

[Structure of Floor Base 32] The floor base 32 is divided into a front divided floor base 35 and a rear divided floor base 36 in the front-rear direction, and the front divided floor base 35 and the rear divided floor base are divided. 36 and 36 can be connected and disconnected freely.

As shown in FIGS. 7 and 8, the front split floor base 35 is a member integrally molded with the front box portion 39, and the front foot step portion 39a is formed.
And the first inner tunnel portion 37 on the front side. And
The rear portion of the first inner tunnel portion 37 is formed in a step portion 37A having an outer surface lowered by one step, and a plurality of maintenance holes K1, K2, K3 are formed in the step portion 37A, and each maintenance hole K1, K2 is formed. Around the K3, a vertical rib portion is formed by bending the periphery of the hole downward so as to project to increase the strength of the step portion 37A. The vertical ribs have substantially the same structure as the vertical ribs 38a (see FIG. 11A) formed on the step portion 38A of the second inner tunnel portion 38 described later.

As shown in FIG. 6, the maintenance holes K1 and K3 formed in the first inner tunnel portion 37 are for adjusting the idling by operating the fuel supply device 24 (fuel injection device, carburetor, etc.). Is a small hole in
The maintenance hole K2 is used to operate the head cover 22 to adjust the tappet, to insert and remove the oil cap 54 to supply and replace engine oil, and to supply cooling water to a reservoir tank (not shown). It is a large hole.

As shown in FIGS. 9 and 10, the split floor base 36 on the rear side is a member integrally molded with the footboard 42, and includes the step portion 40 on the rear side and the second step on the rear side. It consists of an inner tunnel portion 38. Then, the step portion 3 whose outer surface is lowered by one step from the front portion of the second inner tunnel portion 38
8A, and a plurality of maintenance holes K4 are formed in this step portion 38A, and the vertical periphery of each maintenance hole K4 is bent downward and protruded around the maintenance hole K4 as shown in FIG. 11 (a). The rib portion 38a is formed to increase the strength of the step portion 38A. Second inner tunnel part 3
The front portion of 8 has a lattice shape by forming a plurality of maintenance holes K4. As shown in FIG. 6, the maintenance hole K4 formed in the second inner tunnel portion 38 is
It is a hole for inspecting and servicing each auxiliary machine such as the water pump 27 and the starter motor 18 arranged on the engine E.

The connecting structure of the front divided floor base 35 and the rear divided floor base 36 will be described. As shown in FIGS. 7 and 10, a plurality of screw fastening portions provided on both the step portions 37A and 38A. As shown in FIG. 4, the front foot step portions 3 are connected to each other by screws.
A plurality of screw fastening parts n provided respectively at the rear end of 9a and the front end of the rear footrest step portion 40 are screw-connected to each other and connected to a frame member (not shown).

In this connected state, long front floor mats 45 and 46 are attached by superposing over the front footrest step portion 39a and the rear footrest step portion 40. Further, rear floor mats 47 and 48 are superposed and attached to the rear footrest surface 41 for the pillion rider. In the completed product state, the front floor mats 45 and 46 cover the plurality of screw fastening portions n. Next, the maintenance lid 34
The structure of will be described.

[Structure of Maintenance Lid 34] FIG.
2, the maintenance lid 3 as shown in FIGS.
4 is a left and right vertical wall portion 34 having a V-shaped front edge in a side view.
a, 34b and the upper surface portion 34c between them,
From the step portion 37A of the first inner tunnel portion 37 in the connected state to the step portion 38A of the second inner tunnel portion 38, the step portions 37A are removably superposed and assembled, and in the assembled state, both step portions 37
All maintenance holes A1, 38A K1, K2, K3
It is configured to cover K4.

A pair of left and right hooks 49 are formed at the front end portions of the left and right vertical wall portions 34a, 34b, a pair of left and right insertion piece portions 50 are formed at the lower ends of the front and rear intermediate portions, and a left and right rear end portions are formed. A pair of sideways engaging projections 51 are formed, and a screw insertion hole 52 is formed in the center of the rear end of the upper surface portion 34c.

The maintenance lid 34 is assembled over the inner tunnel 31 (that is, the first inner tunnel portion 37 and the second inner tunnel portion 38 in the connected state) as follows (see FIG. 5). (1) The hole 53 formed in the side part of the left and right front footrest step portions 39a with the maintenance lid 34 in the front downward inclination posture above the inner tunnel 31 in the connected state.
Each hook 49 is fitted into the front side (corresponding to the drainage part. This hole is a hole that is long in the front and rear direction as described later). (2) The maintenance lid 34 is swung downward around the hook 49 to move the left and right vertical wall portions 34a, 34
The rear end of b is elastically deformed to project outward, and each insertion piece 50 is fitted into the rear side of the hole 53. (3) The left and right engagement projections 51 on the rear end side, which are forcibly moved to the outside, are moved to the inside, and are pushed and inserted into the ring-shaped rubber material 67 (see FIG. 9) on the side of the second inner tunnel portion 38. (4) A screw is passed through the screw insertion hole 52 of the maintenance lid 34 (see FIG. 4) and fixed to the screw fixing portion n provided on the second inner tunnel portion 38.

When removing the maintenance lid 34 from the inner tunnel 31, the procedure may be reversed.

FIG. 15A shows the maintenance lid 34.
And the first inner tunnel portion 37 and the second inner tunnel portion 3
The connection structure with 8 is shown (the place of X in FIG. 1). That is, the arcuate rear end of the first inner tunnel portion 37 and the arcuate end of the maintenance lid 34 are vertically overlapped with each other, and the downward engaging protrusion 70 provided on the end of the maintenance lid 34 is The first contact plate 72 provided on the first inner tunnel portion 37 and the first contact plate 73 disposed on the second inner tunnel portion 38 are engaged with each other by engaging the engaging holes provided in the first inner tunnel portion 37. Butt in the front-back direction.

As described above, the tunnel portion T has a double structure including the inner tunnel 31 and the maintenance lid 34, and the cross-sectional shape of the tunnel portion T is downward facing U having a high rigidity.
Since it is formed in a character shape, the strength and rigidity of the tunnel portion T can be increased, and it becomes difficult to deform even if a heavy load is placed. Further, the tunnel portion T can be sandwiched between the left and right feet and firmly held, and it becomes easier to ride the tunnel portion T with both feet. Further, at the time of maintenance, all the maintenance holes K1, K2, K3, K4 can be exposed by simply removing the maintenance lid 34 from the inner tunnel 31, so that many maintenance holes K1, K2, K3, K4 can be exposed. It is possible to easily perform inspection and maintenance, that is, maintenance, over the items.

As shown in FIGS. 7, 8 and 15 (b),
At the lower end of the left and right vertical walls 31a in the first inner tunnel portion 37, a drain groove 57 along the front-rear direction and a drain hole (an example of a drain portion) 59 for discharging the liquid guided to the drain groove 57 to the outside. And a water guiding portion d for guiding the liquid flowing down along the back surface 34u to the drain groove 57 is formed on the back surface 34u of the maintenance lid 34 (between the vertical wall 31a and the back surface of the maintenance lid 34). Has a gap). The water guiding part d is provided with a maintenance lid 34.
The lower end portions of the vertical wall portions 34a and 34b are formed in a stepped shape in which the inside projects downward more than the outside. Then, the water guiding portion d is inserted into the drain groove 57.

The drainage groove 57 is located near the root of the front footrest step portion 39a, and most of the drainage groove 57 extending from the front end to the rear portion has a bottomless hole shape. The hole portion serves as the above-described long hole portion 53 into which the hook 49 or the insertion piece 50 is inserted. As a result, most of the rainwater or muddy water guided to the drainage groove 57 on the front side is discharged down the hole 53.

FIG. 9, FIG. 10, FIG. 11 (a), FIG.
As shown in (b), drainage grooves 58 along the front-rear direction are formed at the lower end portions of the left and right vertical walls 31a of the second inner tunnel portion 38, and drainage for discharging the liquid guided to the drainage grooves 58 to the outside. While forming a hole (an example of drainage part),
On the back surface 34u of the maintenance lid 34, the back surface 34u
Water guiding part for guiding the liquid flowing down along u to the drain groove 58 (having the same structure as the water guiding part on the first inner tunnel portion 37 side).
Has been formed. The drain groove 58 is located near the root of the rear footrest step portion 40. As a result, rainwater and muddy water guided to the drainage groove 58 on the rear side are discharged downward.

Due to the above structure, muddy water and rainwater scattered from the front wheels 2 during traveling are maintained in the maintenance holes K1, K2, K.
Back surface 34u of the maintenance lid 34 through 3, K4
Even if it adheres to the muddy water, the muddy water flowing down along the back surface 34u is guided from the water guiding part d to the front and rear drain grooves 57 and 58, and is discharged to the outside of the machine without leaking to the step part S. The drain 59 may be a vertical groove or pipe. The water guiding part d turns the inward direction of the muddy water flowing down the lid back surface 34u so as to guide it to the drain grooves 57 and 58.
A tongue piece may be integrally provided on the back surface 34u of the maintenance lid 34.

[Another Embodiment] [1] In the above embodiment, the floor base 32 is divided into two parts in the front-rear direction, but instead of this structure, the floor base 32 is formed as a single piece without being divided. You can The "engine" in claim 1 means not only combustion parts such as cylinders, but also transmission cases and auxiliary equipment for engines, such as mission cases, carburetors, radiators and their piping systems, oil coolers and their piping systems, etc. Also includes.

[2] In the floor step F shown in FIGS. 4 and 15, if the manufacturing error increases, the step difference between the maintenance lid 34 and the first and second inner tunnel portions 37, 38 and the distance between the end faces thereof will be reduced. It may be larger and the appearance of the product may be more likely to vary depending on the product. However, for example, if the structure (not shown) in which the step is removed and the maintenance lid 34 is superposed on the step is provided, the maintenance lid may vary even if the product error varies. Since the positional relationship between the end face of 34 and the first and second inner tunnel portions 37, 38 does not collapse, the appearance can be improved.

[3] Instead of the screwing structure on the rear end side of the maintenance lid 34, an engaging piece 60 is formed on the rear surface of the rear end portion of the maintenance lid 34 as shown in FIG.
The locking piece 61, which is switchable between a locking action position overhanging the engagement piece 60 and a non-action position retracted rearward from the engagement piece 60 in a plan view, is provided in the second inner tunnel portion 3
It may be provided on the back surface side of 8 (for example, supported by rail 62 so as to be slidable back and forth).

In FIG. 16, an operating lever 65 (the operating lever 65 may be placed at another place such as a handle) that can be operated by opening the openable seat 1 for seating is provided with this. If the lock piece 61 can be switched in position by manipulating the operation lever 65 by linking the lock piece 61 with the wire 61 via the wire 64, the maintenance lid 34 can be detachably attached without the screws being visible. You will be able to assemble. 66 is a lock piece 6
1 is a winding spring that biases 1 toward the locking action position.

[0035]

The scooter type motorcycle according to the present invention is
A scooter type in which a floor step disposed from the lower side of the riding seat to the front wheel side is composed of a pair of left and right foot step portions and a tunnel portion covering the engine between the both step portions so as to straddle the engine. A motorcycle, wherein the tunnel portion is configured in a double structure of an inner tunnel integrally provided in the step portion and an outer tunnel which is detachably superposed on the inner tunnel, and the inner tunnel is Since multiple maintenance holes covered by the outer tunnel are formed, all maintenance holes related to the engine can be exposed by a simple attachment / detachment operation by simply removing the single outer tunnel from the inner tunnel. Engine maintenance such as idling adjustment, tappet adjustment, and engine oil replenishment is performed from these multiple maintenance holes. Door can be.

The floor base consisting of the step portion for placing a foot and the inner tunnel is constructed such that the inner tunnel located inside the outer tunnel integrally forms the left and right step portions and the front leg shield portion and the rear leg shield portion. Since the above-mentioned condition is established and the positional relationship of each part is determined, there is no risk of appearance defects such as gaps at the joints between the front and rear leg shield parts or step parts and the outer tunnel. It is possible to prevent the mounting rigidity of the leg shield portion and the step portion from being lowered even when the leg shield portion and the step portion are removed.

The tunnel portion has a double structure of an outer tunnel and an inner tunnel and is reinforced to improve the strength. Therefore, it is recommended that the driver grip the tunnel portion with his / her feet while driving. Even so, the tunnel portion can be firmly held, and the feel at the time of gripping can be improved. Further, the inner tunnel also improves the rigidity around the inner tunnel in the floor step. Therefore, it is possible to reduce the peripheral portion and the attachment points of the outer tunnel to facilitate the assembly and reduce the manufacturing cost.

When the floor base including the step portion and the inner tunnel is composed of the front divided floor base and the rear divided floor base which are connected to each other, the following effects can be obtained. . That is, for example, when a single large hole that is concealed by the outer tunnel is formed instead of the inner tunnel, for example, the front end and the rear end of the large hole that are largely separated from each other in the floor base are formed. The position in the front-back direction is greatly varied, and a problem such that a gap is formed between the outer tunnel and the outer tunnel is likely to occur, but according to the above configuration of the present invention, the front end portion and the rear end portion are connected to each other. Therefore, it is easy to assemble with dimensional accuracy as designed, and the outer tunnel and the end faces can be accurately aligned.

At the lower end of the vertical wall of the inner tunnel, a drainage groove along the front-rear direction and a drainage portion for discharging the liquid entering the drainage groove to the outside are formed, and at the inner surface of the outer tunnel, In the case of forming a water guiding part that guides the liquid flowing down along the inner surface to the drainage channel, when running in rainy weather, muddy water or rainwater sprayed by the front wheels passes through the maintenance hole of the inner tunnel and becomes Even if it spreads to the back side, muddy water and the like flowing down the left and right along the back side of the outer tunnel is guided to the drainage groove by the water guiding part and drained out of the cover from the draining part. As a result, it is possible to prevent liquid such as muddy water scattered on the back surface of the outer tunnel from leaking out from the joint between the outer tunnel and the floor base or the frame cover or the leg shield. This structure can be constructed at low cost because it is only necessary to form the drainage groove and the drainage portion on the floor base and no new component is added.

Therefore, it is possible to provide a scooter type motorcycle which is capable of preventing the floor steps from getting dirty with muddy water even when the vehicle is running in the rain, while suppressing an increase in manufacturing cost.

[Brief description of drawings]

FIG. 1 is a side view of a scooter type motorcycle.

FIG. 2 is a plan view of a scooter type motorcycle.

FIG. 3 is a front view of a scooter type motorcycle.

FIG. 4 is an exploded perspective view showing the structure of a floor step.

FIG. 5 is a side view showing a positional relationship between an engine and a floor step.

FIG. 6 is a plan view showing a positional relationship between an engine and a floor step.

FIG. 7 is a side view showing a front box and a split floor base on the front side.

FIG. 8 is a plan view showing a front box and a front split floor base.

FIG. 9 is a side view showing a footboard and a rear split floor base.

FIG. 10 is a plan view showing a split floor base on the rear side.

11A is a view taken along the line AA in FIG. 9, and FIG.
BB view in

FIG. 12 is a side view of the maintenance lid.

FIG. 13 is a plan view of the maintenance lid.

FIG. 14 is a rear view of the maintenance lid.

15A is a cross-sectional view showing a portion X of FIG. 1, and FIG. 15B is a cross-sectional view showing a front split floor base and a maintenance lid.

FIG. 16 is a mechanical view of another embodiment showing the attachment means for each maintenance lid.

[Explanation of symbols]

1 passenger seat 31 inner tunnel 31a Vertical wall 32 floor base 34 Outer tunnel 34u back side 35 Front split floor base 36 Split floor base on the rear side 58 drainage 59 Drain d Water transfer section E engine K1, k2, k3, k4 Maintenance hole T tunnel section F floor step

Claims (3)

[Claims] 1. A floor step disposed from the lower side of the riding seat to the front wheel side is composed of a pair of left and right step portions for foot placement, and a tunnel portion covering the engine between the both step portions so as to straddle the engine. In the scooter-type motorcycle, wherein the tunnel portion has a double structure of an inner tunnel integrally provided in the step portion and an outer tunnel which is detachably overlapped with the inner tunnel, A scooter-type motorcycle in which a plurality of maintenance holes covered by the outer tunnel are formed in the inner tunnel. 2. The scooter type motorcycle according to claim 1, wherein the floor base including the step portion and the inner tunnel is constituted by a front split floor base and a rear split floor base which are connected to each other. 3. A drainage groove along the front-rear direction and a drainage portion for discharging the liquid entering the drainage groove to the outside are formed at the lower end of the vertical wall of the inner tunnel, and the drainage groove is formed on the inner surface of the outer tunnel. 3. A water guiding portion is formed to guide the liquid flowing down along the inner surface to the drain groove.
The scooter-type motorcycle described in.