JPH0976972A - Saddle type fuel tank fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a saddle type fuel tank fitting structure capable of reducing the number of part items and facilitating the assembly. SOLUTION: A main frame 4 made of wide angular pipe passing through a center in the vehicle lateral direction is extended rearward from a head pipe of a motorcycle, a mounting member 11 to fit a fuel tank 6 is provided on either surface above or below the main frame 4, and a receiving member 12 is fitted to the fuel tank 6. A mount rubber 13 is fitted to each end of the mounting member 11 to achieve the positioning by side faces 14, 14 of the main frame 4, and a forward fitting part of the fuel tank 6 by engaging the receiving member 12 therewith.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saddle type fuel tank mounting structure for a motorcycle.

[0002]

2. Description of the Related Art A saddle type fuel tank mounting structure is known in which a vehicle body frame extending rearward from the head pipe of a motorcycle and passing through the vehicle width center is extended, and a fuel tank is saddle-supported on the vehicle body frame.

FIG. 14 is a side view of a saddle type fuel tank mounting structure according to the prior art. The saddle type fuel tank mounting structure 1 is shown in FIG.
Reference numeral 01 denotes a main frame 103 having an annular cross section which forms a vehicle body frame from the head pipe 102 rearward, and a seat rail 104 formed of two left and right parallel pipes is provided rearward of the main frame 103. A gusset 105 connects between 103 and the head pipe 102.

A saddle type fuel tank 106 is supported on the main frame 103 and the seat rail 104. The fuel tank 106 is connected to the main frame 103 at its front mounting portion 107 and to the seat rail 104 at its rear mounting portion 108.

FIG. 15 is a sectional view taken along line DD of FIG.
16 and 17 are cross-sectional views of a modification of the front mounting portion. The front mounting portion 107 includes support members 109, 109 provided on both sides of the gusset 105 shown in FIG.
6 supporting members 1 provided on both sides of the main frame 103
10, 110, or the mainframe 103 of FIG.
The mount rubber 1 is attached to both ends of the integrated support member 112 that protrudes to both sides via the stay 111 provided in the
The fuel tank 106 is supported via 13, 113.

FIG. 18 is a sectional view taken along the line EE in FIG.
The rear mounting portion 108 is a cross plate 122 that connects the two square pipes 121, 121 forming a seat rail.
Brackets 123, 123 are erected on the left and right to attach a through bolt 124, and a mount pipe 126 is supported on the through bolt 124 via mount rubbers 125, 125. The mount pipe 126 is joined to the fuel tank 106 via the stay 127 and the patch plate 128.

[0007]

However, since the support member 109 of FIG. 15 and the support member 110 of FIG. 16 of the front side mounting portion 107 are separate right and left bodies, a large number of parts are required and the left and right cores are used during welding. Since a dedicated jig for projecting and fixing is required and the integral support member 112 of FIG. 17 requires the mounting stay 111, it is disadvantageous in terms of the number of parts, and further, the rear side mounting portion of FIG. 108 is a cross plate 121, left and right brackets 123, 123,
Since a large number of parts such as the stay 127 on the fuel tank side and a fixing jig for positioning the through bolt holes of the left and right brackets 123, 123 are required, the cost is increased. In addition, there is a similar problem in the example of JP-A-6-122388 in which a pair of left and right fastening pedestals are attached to both side surfaces of the center frame and the flange on the fuel tank side is bolted.

An object of the present invention is to extend a vehicle body frame from the head pipe of a motorcycle rearward through the center of the vehicle width,
In a saddle type fuel tank mounting structure for mounting a saddle type fuel tank to the vehicle body frame, it is an object to obtain a saddle type fuel tank mounting structure that can reduce the number of parts and facilitate assembly.

[0009]

In order to solve the above-mentioned problems, firstly, a vehicle body frame of a square pipe passing through the center of the vehicle width is extended rearward from a head pipe of a motorcycle, and a saddle-type body frame is attached to the vehicle body frame. In a saddle type fuel tank mounting structure for mounting a fuel tank, a mounting member for mounting the fuel tank is provided on one of upper and lower surfaces of the vehicle body frame.

In the above saddle type fuel tank mounting structure, since the mounting member is provided on one of the upper and lower surfaces of the square pipe, this mounting member does not require a dedicated positioning and fixing jig, It can be easily assembled to the upper and lower surfaces, and the fuel tank is supported by this mounting member.

Secondly, a body frame of a square pipe extending rearward from the head pipe of the motorcycle and passing through the center of the vehicle width is provided.
In a saddle type fuel tank mounting structure for mounting a saddle type fuel tank to the vehicle body frame, a mounting member is extended from the fuel tank, and a tip of the mounting member is mounted on an upper surface of the vehicle body frame or on both upper and lower surfaces thereof.

In the saddle type fuel tank mounting structure, since the mounting member extending from the fuel tank is mounted on both or one of the upper and lower surfaces of the square pipe, the mounting member can be easily mounted without using a dedicated jig or the like. It can be assembled and the fuel tank is supported via the mounting member.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of a motorcycle to which a saddle type fuel tank mounting structure according to the present invention is applied. A vehicle body frame 1 of the motorcycle is centered in the rearward direction from a head pipe 3 that rotatably supports a front fork 2. The main frame 4 and the seat rail 5 are provided to extend rearward through the main frame 4 and the main frame 4 and the seat rail 5.
A fuel tank 6 is supported by a saddle, and a swing arm 7 is swingably provided at a lower portion of the main frame 4.

FIG. 2 is an enlarged view of the fuel tank portion of FIG. 1. The main frame 4 and the seat rail 5 are constituted by one wide square pipe whose upper and lower surfaces and both side surfaces are parallel to each other. The lower surface of the main frame 4 and the head pipe 3 are connected by a gusset 8, and the front side of the fuel tank 6 is attached to the main frame 4 at the front attachment portion 9 and the rear side is attached to the seat rail 5 at the rear attachment portion 10. To be

FIG. 3 is a sectional view taken along the line AA of FIG. 2, in which the front mounting portion 9 of the saddle type fuel tank 6 arranged so as to surround the upper side and both sides of the main frame 4 is the lower surface of the main frame 4. The mounting member 11 mounted between the gusset 8 and the receiving member 12, 12 on the fuel tank side, and the mounting rubbers 13, 13 interposed between the two.

The mounting member 11 is a tubular member extending in the vehicle width direction, and is fixed between the lower surface of the main frame 4 and the gusset 8 having a U-shaped cross section. The mount rubbers 13 and 13 are fitted to both ends of the mounting member 8 and are attached to the side surface 1 of the main frame 4.
It is positioned by abutting against 4,4. The receiving member 1
2, 12 have mount ports for receiving the mount rubbers 13, 13 from the front side (front side of the paper surface), and are attached to the fuel tank 6 via the patch plates 15, 15.

FIG. 4 is an exploded perspective view of the first mounting portion of the front mounting portion of the fuel tank. The front mounting portion 9 includes a gusset 8 having notches 16 and 16 at a mounting position of the mounting member 11. It is composed of a mounting member 11 and the like, and is configured by positioning the gusset 8 with the head pipe and the main frame 4, and welding the lower surface of the main frame 4 with matching the left and right protruding dimensions of the mounting member 11.

The procedure for assembling the fuel tank 6 is to mount the mount rubbers 13, 13 on both ends of the mounting member 11,
The main frame 4 is positioned by abutting on the side surfaces 14, 14 of the main frame 4, the mount port 17 of the fuel tank side receiving member 12 is exposed from the rear of the mount rubbers 13, 13, and the fuel tank 6 is advanced to mount the front side thereof. .

In the saddle type fuel tank mounting structure thus constructed, one mounting member in the vehicle width direction is provided on the lower surface of the square pipe forming the main frame, and the position is defined by the notches 16 of the gusset 8. Since it is determined, the mounting member can be easily welded and assembled without requiring a special positioning jig, and the fuel tank can be saddle-supported by the mounting member having a simple structure.

Therefore, in this saddle type fuel tank mounting structure, the number of parts can be reduced by a simple structure, and the cost can be reduced together with the ease of mounting the mounting member. it can.

FIG. 5 is an exploded perspective view of the second embodiment of the front mounting portion of the fuel tank. The front mounting portion 9 extends from the fuel tank 6 with the nut 21 fixed to the upper surface 4a of the main frame 4. It is composed of a mounting member 22 and the like to be projected. The procedure for assembling the fuel tank 6 is as follows:
3 mount the mount rubber 24, stepped bolt 25
Is inserted and screwed into the nut 21.

The above nut can be easily assembled without the need for a dedicated jig, and the stepped bolt can be screwed into the nut on the upper surface of the main frame to fix the mounting member. Similar to the above, the mounting structure of the fuel tank can reduce the number of parts with a simple structure, and can reduce the cost together with the easy mounting of the mounting member.

FIG. 6 is an exploded perspective view of the third embodiment of the front mounting portion of the fuel tank. The front mounting portion 9 includes a stepped stud bolt 26 fixed to the upper surface 4a of the main frame 4 and a fuel. The tank includes a mounting member 22 and the like.

As for the procedure for assembling the fuel tank 6, the mount rubber 24 is fitted into the mounting member 22, the mounting member 22 is fitted into the stud bolt 26, and fixed with the cap nut 27. Since the mounting member is positioned by the stud bolt, the mounting structure of the saddle type fuel tank has excellent assembling properties and also has the same operation and effect as above.

FIG. 7 is an explanatory view of the fourth embodiment of the front side mounting portion of the fuel tank. This front side mounting portion has an opening 28 formed in the upper surface 4a of the main frame 4 shown in FIG. It is composed of a mounting member 22 extending from the mounting member 22 and mount rubbers 29, 29 mounted on the tip portion thereof.

As for the procedure for assembling the fuel tank 6, the tip of the mounting member 22 is recessed from the opening 28 of the main frame 4 into the hollow portion thereof, and the mount rubbers 29, 29 are used (b).
The square pipe is fixed between the upper and lower surfaces 4a and 4b. By forming a notch 30 having the same width as the mounting member 22 in the opening 28, the mounting member 2 recessed from the opening 28 is formed.
2 is positioned in the left-right direction by the notch 30, so that it is more effective in terms of assembling.

FIG. 8 is a sectional view taken along the line BB in FIG. 2. The mounting portion 10 on the rear side of the fuel tank is fixed to the upper surface 4a of the seat rail 4 and is a mounting pipe 31 in the vehicle width direction.
A mount rubber 32, 32 attached to the mounting pipe 31, a through bolt 33 held by the mount rubber 32, 32, and a fuel tank-side substantially U-shaped bracket 34 supporting the through bolt 33. The patch plate 34b and the like are included.

FIG. 9 is an exploded perspective view of the rear mounting portion of the fuel tank shown in FIG. 2. The mounting pipe 31 has a single cylindrical member and is directly mounted on the upper surface 5a of the seat rail 5. Therefore, positioning and fixing can be easily performed without requiring a dedicated fixing jig, and the welding work can be simplified. Further, by welding both longitudinal sides of the mounting pipe 31 within the width of the seat rail 5, it is possible to secure sufficient joint strength.

The procedure for assembling the fuel tank 6 is as follows. Mount the mount rubbers 32, 32 on both ends of the mount pipe 31, align the holes 34a, 34a of the bracket 34 on the fuel tank side with the centers of the mount rubbers 32, 32, and then insert the through bolts 33. The fuel tank 6 is attached by inserting the fuel tank 6. Therefore, the mounting portion on the rear side of the fuel tank can be configured by a mounting pipe that is easily mounted and a minimum number of parts.

FIG. 10 shows the second mounting portion on the rear side of the fuel tank.
FIG. 4 is a side view according to the embodiment of the present invention, in which the rear mounting portion 10 is formed by integrally mounting the mounting portion 35 on the housing of the fuel tank 6, thereby reducing the bracket on the fuel tank side and the patch plate thereof and further reducing the number of parts. And the processing man-hour can be reduced.

FIG. 11 is a sectional view taken along line CC of FIG.
The fuel tank 6 is formed by seam-welding the upper casing 36 and the bottom plate 37. The flange of the welded portion serves as the attachment portion 35, and the hole 35a is formed so that the through bolt is inserted and fixed.

FIG. 12 shows a third mounting portion on the rear side of the fuel tank.
FIG. 6 is an exploded perspective view according to the embodiment of FIG.
Is a bracket 34 that is directly attached to the upper surface 5a of the seat rail 5, a mounting pipe 31 on the fuel tank 6 side, and a stay 3 that supports the mounting pipe 31.
8 and patch plate 34b. Since the bracket 34 can be positioned on the upper surface 5a of the seat rail 5 without requiring a dedicated fixing jig, the bracket 34 can be easily welded.
Same as above.

FIG. 13 shows the fourth mounting portion of the rear side of the fuel tank.
FIG. 6 is an exploded perspective view according to the embodiment of FIG.
Is composed of a nut 21 provided on the seat rail 5, a mounting member 22 extending from the fuel tank 6, and the like. The mounting member 22 is mounted on the upper surface 5a of the seat rail 5 by a mount rubber 24 and a stepped bolt 25. ,
The same effect as the above is exhibited.

[0034]

As described above, in the saddle type fuel tank mounting structure according to the first aspect, the mounting member is provided on one of the upper and lower surfaces of the square pipe of the vehicle body frame. It can be easily assembled on the upper and lower surfaces of the square pipe without requiring a dedicated positioning and fixing jig, and the fuel tank is supported by this mounting member.

Therefore, the structure for mounting the saddle type fuel tank can reduce the number of parts with a simple structure, and can reduce the cost together with the easy mounting of the mounting member.

The saddle type fuel tank mounting structure according to claim 2 is
Since the mounting member extending from the fuel tank is attached to both or one of the flat plates forming the upper and lower surfaces of the square pipe of the vehicle body frame, the mounting member can be easily assembled without requiring a special jig or the like. The fuel tank is supported via the mounting member.

Therefore, the structure for mounting the saddle type fuel tank can reduce the number of parts with a simple structure, and can also reduce the cost by facilitating the mounting of the mounting member.

[Brief description of drawings]

FIG. 1 is a side view of a motorcycle to which a saddle type fuel tank mounting structure according to the present invention is applied.

FIG. 2 is an enlarged view of the fuel tank portion of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an exploded perspective view of a first embodiment of a front mounting portion of a fuel tank.

FIG. 5 is an exploded perspective view of a second embodiment of the front mounting portion of the fuel tank.

FIG. 6 is an exploded perspective view of a third embodiment of the front mounting portion of the fuel tank.

FIG. 7 is an explanatory view of a fourth embodiment of a front mounting portion of a fuel tank.

8 is a sectional view taken along line BB of FIG.

9 is an exploded perspective view of a rear mounting portion of the fuel tank of FIG.

FIG. 10 is a side view according to the second embodiment of the rear mounting portion of the fuel tank.

11 is a sectional view taken along the line CC of FIG.

FIG. 12 is an exploded perspective view of a rear mounting portion of a fuel tank according to a third embodiment.

FIG. 13 is an exploded perspective view of a rear mounting portion of a fuel tank according to a fourth embodiment.

FIG. 14 is a side view of a saddle type fuel tank mounting structure according to a conventional technique.

FIG. 15 is a sectional view taken along line DD of FIG. 14;

16 is a cross-sectional view of a modification of the rear mounting portion of FIG.

FIG. 17 is a cross-sectional view according to a modification of the rear mounting portion in FIG.

18 is a cross-sectional view taken along the line EE of FIG.

[Explanation of symbols]

1 ... Body frame, 3 ... Head pipe, 4 ... Main frame, 4a ... Top surface, 4b ... Bottom surface, 5 ... Seat rail, 5
a ... upper surface, 6 ... fuel tank, 8 ... gusset, 9 ... front mounting portion, 10 ... rear mounting portion, 11 ... mounting member,
12 ... Receiving member, 13 ... Mount rubber, 14 ... Side surface,
15 ... Patch plate, 16 ... Notch, 17 ... Mounting port, 21 ... Nut, 22 ... Mounting member, 23 ... Hole, 24
... Mount rubber, 25 ... Stepped bolt, 26 ... Stud bolt, 28 ... Opening, 29 ... Mount rubber, 30 ...
Notch, 31 ... Mounting pipe, 32 ... Mount rubber, 33 ... Through bolt, 34 ... Bracket, 34a ...
Hole, 34b ... patch plate, 35 ... mounting portion, 35a
... hole, 36 ... upper housing, 37 ... bottom plate, 38 ... stay.

Claims (2)

[Claims] 1. A saddle-type fuel tank mounting structure for mounting a saddle-type fuel tank on a vehicle body frame, comprising a rectangular pipe extending rearward from a head pipe of a motorcycle and passing through a vehicle width center, and mounting a saddle-type fuel tank on the body frame. A saddle type fuel tank mounting structure comprising a mounting member for mounting a fuel tank on one of upper and lower surfaces of a frame. 2. A saddle-type fuel tank mounting structure for mounting a saddle-type fuel tank on a body frame of a rectangular pipe extending rearward from a head pipe of a motorcycle and passing through a vehicle width center, the fuel comprising: A saddle type fuel tank mounting structure characterized in that a mounting member is extended from a tank and the tip of the mounting member is mounted on the upper surface of the vehicle body frame or on both upper and lower surfaces.