JPS6341795B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-wheeled motor vehicle in which a main pipe is covered with a frame cover made of synthetic resin, and particularly to a mounting structure for the frame cover.

Pipe frames, which are often used as frames for small motorcycles, are made of multiple pipe materials welded together, making it difficult to find space for batteries and engine accessories, and making it difficult to install them. There are some problems that I have to worry about.

For this reason, conventionally, for example,
As seen in the "No. 1 Publication," a pair of left and right steel plates extending rearward are welded to the head pipe, and these steel plates are integrally connected with a plurality of support stays, and the space formed between these steel plates is filled with BACKGROUND OF THE INVENTION Frames that can accommodate electrical components and the like have been developed.

However, this conventional frame has a problem in that the steel plate extending rearward from the head pipe is wide, making the main frame of the frame large and making the frame itself heavy.

For this reason, in a pipe frame that combines the above-mentioned pipe materials, the main pipe, which extends rearward from the head pipe and becomes the main frame of the frame, is covered with a synthetic resin frame cover, which is different from the above-mentioned conventional frame. It is thought to obtain a similar appearance.

However, since this frame cover needs to cover the entire main pipe extending in the front-rear direction, the shape of the cover becomes large, which reduces the ease of assembly to the frame. This made it easy for dimensional errors between the covers to occur. For this reason, there are problems that need to be solved, such as distortion of the frame cover and, in some cases, difficulty in attaching it to the frame.

Therefore, the present invention enables the frame cover to be easily assembled to the main pipe.
It is an object of the present invention to provide a frame cover mounting structure for a two-wheeled motor vehicle in which dimensional errors are less likely to affect the frame cover mounting portion and distortion and deformation of the frame cover can be prevented.

Therefore, in the present invention, when covering the main pipe whose front end is connected to the head pipe and extends rearward with a frame cover made of synthetic resin, the frame cover is a pair of side covers arranged on the left and right sides of the main pipe. and a top cover placed on the upper side of these side covers, and the side cover has its front and rear ends connected to the frame respectively, and
The middle part of the side cover is connected and fixed to each other by locking the top cover to the upper part of the side cover.

The present invention will be explained below based on an embodiment shown in the drawings.

Figure 1 shows a two-wheeled motor vehicle, where 1 is a frame, 2
is a front fork, 3 is a steering wheel, 4 is an engine, 5 is a driving wheel, and 6 is a seat. The frame 1 is of an underbone type, and the front ends of a pair of left and right main pipes 8, 8 are welded to the rear side of a head pipe 7. A head pipe gusset 9 is disposed on the upper surface of the front end of the main pipes 8, 8, spanning between them, and both side edges of the head pipe gusset 9 are welded to the main pipes 8, 8.
The main pipes 8, 8 extend rearward, and their rear sides rise to form seat pillar tubes 10, 10, and the upper ends of these seat pillar tubes 10, 10 are flat connecting pieces. The parts 11, 11 are formed. The connection pieces 11, 11 are connected to a pair of left and right seat rails 12, 12.
flat parts 13, 13 provided approximately in the middle of the
It is welded to the inner surface of the seat rail 12,
12 is arranged along the longitudinal direction of the vehicle body.
Brackets 14, 14 are welded to the outer surfaces of the joints between the seat rails 12, 12 and the seat pillar tubes 10, 10.
Reactions 16, 16 are fixed to 4, 14 via stud bolts 15. In addition, at the front end and rear end of the seat rails 12, 12,
Connecting members 17, 17 which also serve as cross members are horizontally suspended, and a fuel tank 18 is arranged between the seat rails 12, 12. A support member 19 is welded to the lower surfaces of the front end sides of the seat rails 12, 12, spanning between them, and a support bracket 2 is welded to the center of the lower surface of this support member 19.
0 is welded. This bracket 20 has a through hole 21 and a grommet 22 spaced apart in the longitudinal direction of the vehicle body, and is used to connect the rear end of a side cover to be described later.

Approximately the front half portions of the head pipe 7, main pipes 8, 8, and seat rails 12, 12 are covered with a frame cover 23 made of ABS resin, as a preferred example. This frame cover 23 has a three-part structure including a pair of side covers 24, 24 placed on the left and right sides of the frame 1, and a top cover 25 placed on the upper side of these side covers 24, 24. These structures will be explained in detail.

First, the structure of the side covers 24, 24 will be explained with reference to FIGS. 4 to 10.
Each of the side covers 24, 24 has a head pipe cover part 26 at the front end that covers approximately half the circumferential surface of the head pipe 7 from the side thereof, and is connected to the head pipe cover part 26 and extends along the main pipes 8, 8. A main pipe cover part 27 and seat pillar tubes 10, 10 extend toward the rear lower part and cover the sides of the main pipes 8, 8.
A seat rail cover part that extends toward the rear upper part along the seat pillar tubes 10, 10 and covers a portion from the joint portion between the seat pillar tubes 10, 10 and the seat rails 12, 12 to the front ends of the seat rails 12, 12. It is equipped with 28. The upper and lower edges of these side covers 24, 24 form flange pieces 29, 29 that are bent inward, that is, toward the frame 1, and this upper edge flange piece 29 is bent toward the front end of the seat rail cover 28. are in conflict with each other. Grommets 30, 30 each opening toward the head pipe 7 are attached to the upper and lower ends of the head pipe cover portion 26 that extend around the front side of the head pipe 7, as shown in FIGS. 7 to 9. These grommets 30, 30 are adapted to be removably fitted into locking protrusions 31 provided at the upper and lower ends of the front surface of the head pipe 7. Further, the upper end portions of each upper edge flange piece 29 that wrap around to the rear side of the head pipe 7 are bent so as to abut each other to form locking pieces 32, 32.
2 and 32 are metal clips 33 that span these.
The abutment is achieved by elastically fitting the two. Therefore, the side cover 24,
24 is the grommet 3 of the head pipe cover part 26
By fitting into the locking protrusions 31 of 0, 30 and 30, 30 and abutting the locking pieces 32, 32 via the clip 33, the front end thereof is connected and fixed to the head pipe 7, In this fixed state, the head pipe cover portion 26 covers substantially the entire circumference of the head pipe 7 and the joints with the main pipes 8, 8 and the head pipe gusset 9.

The head pipe cover portion 26 of the other side cover 24 is provided with a window 34 for visually recognizing the vehicle body number engraved on the head pipe 7.

On the other hand, the rear end portions of the side covers 24, 24 are connected to the support bracket 20. That is, on the inner surface of the upper edge flange piece 29 of the seat rail cover part 28 in one side cover 24, there is a bracket 20 as shown in FIGS. 5 and 12.
A support body 35 is provided upright so as to face one side, and an engagement protrusion 36 having a substantially arrowhead-shaped cross section that can be removably fitted to the grommet 30 is integrally protruded from the support body 35. has been done. Similarly, a flange wall 37 is provided upright on the edge of the upper flange piece 29 of the other side cover 24 so as to face the other side surface of the bracket 20. A bolt 38 is screwed through the through hole 21. Further, at the rear end portion of the seat rail cover portion 28 of each side cover 24, 24, the seat rail 12, 1
This flat part 1 penetrates through the flat parts 13, 13 of 2.
3, 13 Bolt 4 screwed into nut 39 on the inner surface
0 is inserted. Therefore, side cover 2
The rear ends of the bolts 4 and 4 are connected to the bolts 38 and 4.
0, and the engagement protrusion 31 and the chrome fitting 30 are connected and fixed to the seat rails 12, 12 by mutual fitting.

Therefore, in the middle of the side covers 24, 24, that is, in the upper edge flange piece 29 of the main pipe cover part 27, there is a pair of positioning holes 41, 41 spaced apart along the longitudinal direction of the vehicle body, and a pair of positioning holes 41, 41 located between them. Temporary fixing holes 42 are provided, and each of these holes 41, 41 and 42 has a slit shape along the longitudinal direction of the vehicle body. and each side cover 2
As shown in FIG. 11, claw portions 44, 44 at both ends of a connecting body 43 are removably fitted into the temporary fixing holes 42 of 4, 24, and this connecting body 43 is attached to a side cover. The main pipe cover portions 27, 27 are straddled between the main pipe cover portions 27, 24 to maintain a constant width of separation between the main pipe cover portions 27, 27.

Incidentally, one side cover 24 is provided with an adjustment hole 46 for inserting a driver or the like for turning the throttle screw of the carburetor 45 when adjusting the idling.

Next, the above-mentioned upper cover 25 will be explained.
The upper cover 25 has a front end and a rear end bent upward, and has a shape that follows the upper edges of the side covers 24, 24. Both side edges of this upper cover 25 are bent downward to form side wall portions 47, 47, and the edges of these side wall portions 47, 47 are provided with respective side covers 24,
Connection pieces 48, 48 and 48, 48 that can be fitted into the 24 positioning holes 41, 41 and 41, 41 are provided. These connecting pieces 48, 48 and 48, 48 are in sliding contact with the inner surface of the upper edge flange piece 29 of each side cover 24, 24 at the rear edge of the vehicle body, and are locked on the rear edge of the opening of the positioning hole 41... It has an inner surface sliding contact step 49 that is in sliding contact with the outer surface of the flange piece 29 on the front edge of the vehicle body. Therefore, in this upper cover 25, the connecting pieces 48 are fitted into the positioning holes 41, and the entire cover 25 is moved toward the rear of the vehicle body (in the direction of arrow A in FIG. 4), and the inner sliding contact step portions 49 are moved. By locking the rear edge of the opening of the positioning hole 41...
4, 24 and is positioned and fixed to cover the upper part of the main pipes 8, 8. By this fixation, the side covers 24, 24 are configured such that the width of separation between the main pipe cover parts 27, 27 is maintained constant and the side covers 24, 24 are connected to each other. In this case, the outer surface sliding step portion 50 is in contact with the outer surface of the upper edge flange piece 29, and the outer surface of the upper edge flange piece 29 and the side walls 47, 47 of the top cover 25 are in contact with each other.
A predetermined gap is continuously formed between the edge of the frame and the edge of the frame. In addition, the recess 51 provided on the upper end side of the top cover 25 is provided with the upper edge flange piece 2 of one or the other side cover 24, 24.
A bolt 52 is inserted through the upper end of the upper cover 29, and the upper end of the upper cover 25 is positioned and fixed by this bolt 52.

The periphery of the fuel tank 18, the rear parts of the seat rails 12, 12, and the brackets 14, 14 are covered with a synthetic resin bottom cover 53, and the upper part of the fuel tank 18 is connected to the upper opening of the bottom cover 53. It is covered by a crowned top cover 54.

According to such a configuration, the frame cover 23, which integrally covers the area from around the head pipe 7 to the lower part of the seat 6 along the main pipes 8, 8, is placed between the left and right side covers 24, 24 and the upper parts of these side covers 24, 24. Since it has a three-part structure with a top cover 25 that covers the frame 1, each of the covers 24, 24, 25 can be assembled to the frame 1 separately, compared to the case where the frame cover 23 is integrated. , the assembly work efficiency is improved.

Moreover, the intermediate portions of the main pipe cover parts 27, 27 extending rearward along the main pipes 8, 8 in the side covers 24, 24 are locked by fitting the connecting pieces 48 of the upper cover 25 into the positioning holes 41, 41 thereof. By doing so, the side covers 24, 24 and the upper cover 25 are connected and fixed to each other, so that the side covers 24, 24, 2
It is possible to prevent dimensional tolerances and dimensional errors between 4 and the frame 1 from acting.

That is, the intermediate portion of the relatively long main pipe cover parts 27, 27 along the main pipe 8,
When fixed to the main pipe 8, since the main pipes 8, 8 and the main pipe cover parts 27, 27 are both long, dimensional tolerances and dimensional errors tend to concentrate on the attachment parts of these two, and the side There is a possibility that the covers 24, 24 may be distorted or the upper cover 25 may not be attached.

However, in the above configuration, the main pipe cover portion 27 of the long side covers 24, 24,
27 is in a state where it can move freely with respect to the main pipes 8, 8, so there is no dimensional error or error in the attachment part between the side covers 24, 24 and the top cover 25 on the side of these and the frame 1. Dimensional tolerances do not act cumulatively.

Therefore, the ease of assembling the side covers 24, 24 and the top cover 25 is improved, and it is possible to prevent the installation posture of these covers 24, 24, 25 from being damaged, distortion, or deformation.
The frame cover 23 can be reliably fixed in a regular position.

In addition, side covers 24, 24 and Atsupa cover 2
5. If the mutual boundary parts of the covers 24, 24 and 25 are brought into contact with each other, there is a risk that gaps will be formed at multiple places in the boundary parts due to the tolerances of these covers 24, 24 and 25, and the appearance will be impaired. According to the example, since a continuous gap is provided in advance between the outer surface of the flange piece 29 of the side covers 24, 24 and the side wall 47 of the top cover 25, the gap may vary in size to a certain extent, but the gap is partially It is possible to prevent this from occurring, and the boundary portion becomes smooth, which is advantageous in terms of appearance. Moreover, due to the vibration, the side cover 2
4, 24 and the top cover 25 can be prevented from coming into contact with each other, and unpleasant contact sounds and scratches on both can also be prevented.

Furthermore, when locking the upper cover 25 to the side covers 24, 24, the side covers 24, 24 are temporarily secured by the connecting body 43, and the distance between them is kept constant, so that the connecting pieces 48... The holes 41... can be easily aligned, and the ease of assembly is improved.

Note that the present invention is not limited to the above embodiments. For example, the number of main pipes is not limited to two, but may be one.

Furthermore, the frame is not limited to the underbone type, but may also be diamond-shaped or cradle-shaped.

According to the present invention described in detail above, the frame cover that covers the long main pipe has a three-part structure consisting of the left and right side covers and the top cover, so that when installing the frame cover, each of the above covers can be separated. It is sufficient to assemble them individually, and the assembly work efficiency is improved compared to when the frame cover is an integral structure.

Moreover, since the middle part of the side cover can move freely relative to the main pipe, the dimensional errors and tolerances of both covers and the frame accumulate at the attachment point between the side cover and the top cover. It does not act as
This not only improves the ease of assembling the side cover and top cover, but also prevents the installation position of these covers from being damaged and the covers from becoming distorted or deformed, ensuring that the frame cover is securely fixed in its proper position. There are advantages to being able to do this.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of the motorcycle, Fig. 2 is a plan view, Fig. 3 is a side view showing a state in which the frame cover, seat, etc. are removed, and Fig. 4 The figure is a partially sectional side view of the frame cover, Figure 5 is a plan view of the side cover, Figure 6 is a side view of the side cover, and Figure 7 is the middle of Figure 6.
Figure 8 is a sectional view taken along the line in Figure 7, Figure 9 is a view taken along the line in Figure 6, and Figure 10 is a side view of the side cover seen from the opposite side. Figure 11 is a sectional view taken along line XI-XI in Figure 4, Figure 12 is a sectional view taken along line XII-XII in Figure 4,
FIG. 13 is a sectional view taken along the line - in FIG. 4;
Figure 14 is a plan view of the Atsupa cover, Figure 15 is a side view of the Atsupa cover, and Figure 16 is the middle of Figure 4.
A cross-sectional view along the line, Figure 17 is in Figure 4 -
A cross-sectional view along the line, Figure 18 is in Figure 4 -
It is a sectional view along a line. 7...Head pipe, 8...Main pipe, 2
3... Frame cover, 24... Side cover,
25...Atsupa cover.

Claims (1)

[Claims] 1. In a motorcycle where a main pipe whose front end is connected to a head pipe and extends rearward is covered with a frame cover made of synthetic resin, the frame cover covers a pair of side covers arranged on the left and right sides of the main pipe and these side covers. The front and rear ends of the side covers are connected to the frame, respectively, and the upper part of the side covers is fixed to the upper part of the side covers. A frame cover mounting structure for a two-wheeled motor vehicle, characterized in that the frame cover is connected and fixed to each other.