JP4275970B2 - Motorcycle fuel tank drain structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel tank drain structure for a motorcycle.
[0002]
[Prior art]
2. Description of the Related Art As a fuel tank drain structure for a motorcycle, one having a drain pipe provided below a fuel tank is known (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 1-30309 (Page 2, Figure 3)
[0004]
FIG. 3 of Patent Document 1 will be described with reference to FIG. In addition, the code | symbol was reassigned.
FIG. 8 is a cross-sectional view showing a fuel tank drain structure of a conventional motorcycle. A fuel injection base 422 is attached to the upper portion of the tank 421, and a drain pipe is connected from the recess 423 of the fuel injection base 422 to the bottom piece 424 of the tank 421. 425 is extended, a cup-shaped tip 427 of a drain pipe 426 provided separately at the lower end of the drain pipe 425 is faced, and the drain pipe 426 is hung along the slope 432 of the air cleaner 431, and in the middle of the drain pipe 426. It shows that the drain pipe 426 is attached to the air cleaner 431 by inserting the provided locking projections 433 and 434 into the holes 436 and 437 formed in the air cleaner 431. Reference numeral 438 denotes a cap for closing the fuel injection cap 422.
[0005]
[Problems to be solved by the invention]
Since the drain pipe 426 is provided with the locking projections 433 and 434 in order to be attached to the air cleaner 431, the drain pipe 426 is a custom-made product and causes an increase in cost. If the drain pipe 426 itself is not changed and can be held using surrounding parts, a commercially available product can be used as the drain pipe, the increase in the number of parts can be suppressed, and the cost increase can be suppressed.
[0006]
Further, the cup-shaped tip portion 427 of the drain pipe 426 merely faces the lower end of the upper drain pipe 425, so that depending on the positional relationship between the tank 421 and the air cleaner 431, the drain pipe 425 may be connected to the drain pipe 425. It is conceivable that the position of 426 is shifted.
[0007]
Therefore, an object of the present invention is to improve the fuel tank drain structure of the motorcycle, thereby suppressing an increase in cost and preventing the displacement of the drain pipe connection portion.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to a first aspect of the present invention, there is provided a motorcycle in which a drain pipe is exposed at a lower portion of a bottom plate of a fuel tank and a drain tube is provided on a vehicle body frame side so as to face the lower end of the drain pipe. An electrical component is attached to the vehicle body frame, the upper part of the electrical component is covered with a cover member, the drain tube is held by a tube holding hole provided in the cover member, and a protruding portion is provided that protrudes the drain pipe from the bottom plate to the outside. Extend the drain tube downward along the lower part of the main pipe and the pivot plate that make up the body frame. Pass the drain tube through the tube retaining hole and tube retaining bracket of the cover member in order from the top, and drain the end of the drain tube. connected to the projecting portion of the pipe, to generate the slack by pulling the curved portion of the central portion of the drain tube horizontally And wherein the door.
[0009]
The drain tube can be held by a cover member that covers the electrical component, and the number of components can be reduced. Further, since the drain tube is held by the guide portion of the cover member, it is not necessary to change the drain tube, and a commercially available product can be used as the drain tube.
[0010]
Furthermore, if the drain tube is held by the cover member and the drain tube is directly connected to the drain pipe, the drain tube will not shift with respect to the drain pipe.
[0011]
According to a second aspect of the present invention, the harness coupler is supported by the cover member.
There is no need to provide a special support member for the harness coupler, and the number of parts can be further reduced.
[0012]
According to a third aspect of the present invention, the electrical component is an ignition coil.
By covering the ignition coil with the cover member, it is possible to prevent the ignition coil from being exposed to rainwater.
[0013]
According to a fourth aspect of the present invention, the drain tube is inserted through the first tube holding bracket, the second tube holding bracket, and the third tube holding bracket in order from the upper end of the drain tube into the tube holding hole of the cover member. A slack is generated by horizontally pulling a curved portion between the second tube holding metal fitting and the second tube holding metal fitting.
[0014]
According to a fifth aspect of the motorcycle, a drain pipe is exposed at a lower part of a bottom plate of a fuel tank, and a drain tube is provided on the side of the body frame facing the lower end of the drain pipe. The upper part of this electrical component is covered with a cover member, the drain tube is held by a tube holding hole provided in the cover member, a protruding part is formed by protruding the drain pipe from the bottom plate, and the drain tube is covered from above. Drain that is partially extended immediately after connection when the rear end of the drain tube is connected to the projecting part before passing through the tube holding hole of the member and the tube holding fitting in order and attaching the fuel tank to the body frame. The curved portion of the central portion of the tube is pulled horizontally to generate slack, and the partially extended state is eliminated.
[0015]
The drain tube can be held by a cover member that covers the electrical component, and the number of components can be reduced. Further, since the drain tube is held by the guide portion of the cover member, it is not necessary to change the drain tube, and a commercially available product can be used as the drain tube.
[0016]
Furthermore, if the drain tube is held by the cover member and the drain tube is directly connected to the drain pipe, the drain tube will not shift with respect to the drain pipe.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a motorcycle adopting a fuel tank drain structure according to the present invention. The motorcycle 10 includes a body frame 11 having a head pipe 12 provided at the front end, and a substantially rear and rear side from the head pipe 12. A main pipe 13 extending obliquely downward, a pivot plate 14 attached to the lower portion of the main pipe 13, and a pair of seat rails 16 and 16 extending rearward from the left and right sides of the main pipe 13 (only the reference numeral 16 on the front side) And sub-pipes 17 and 17 (only the reference numeral 17 on the front side) connected to the rear portions of these seat rails 16 and 16 and the pivot plate 14, respectively, and a straight line from the head pipe 12 to the rear and obliquely downward. The front fork 21 can be steered to the head pipe 12. The front wheel 22 is attached to the lower end of the front fork 21, the handle 23 is attached to the upper end of the front fork 21, and the head lamp 26 and the meter 27 are supported by the front stay 24 provided at the front of the head pipe 12. A front license plate 31 is attached to the headlamp 26 via a license plate stay 28, and a combination switch 42 having an ignition switch and a steering lock device is attached to a top bridge 41 connecting the left and right upper parts of the front fork 21. This is a vehicle in which the upper periphery of the combination switch 42 is surrounded by a switch cover 43.
[0018]
In the motorcycle 10, a fuel tank 51 is attached to the main pipe 13, a drain pipe 54 is extended from a base 52 provided at a fuel filler port of the fuel tank 51 to a bottom wall 53, and a drain tube 56 is connected to a lower end of the drain pipe 54. The drain tube 56 is hung down substantially along the lower portion of the main pipe 13 and the pivot plate 14, and the main pipe 13, the front portions of the seat rails 16, 16 and both sides of the sub-pipes 17, 17 are Each cover is covered with two side covers 65 and 65 (only the reference numeral 65 on the front side is shown), and rear cowls 66 are provided on both sides of the rear of the seat rails 16 and 16 behind the side covers 65 and 65. 66 (only the reference numeral 66 on the front side is shown) and the swing is swingably attached to the pivot plate 14 (Only the near side of the code 68.) Rear cushion unit 68 to the rear and the seat rails 16, 16 side of the over arm 67 is also the vehicle and connected respectively to the ends of the.
[0019]
Here, 77 is a front fender that covers the upper side of the front wheel 22, and 78 and 78 (only front side reference numeral 78 is shown), left and right front cowls that cover the side of the front of the vehicle body including the front of the fuel tank 51, 81 , 83 is an engine attached to the main pipe 13, the pivot plate 14, and the down pipe 18, and a transmission integrally provided at the rear of the engine, 85 is a carburetor attached to the engine 81 via an intake pipe 86, and 87 is An air cleaner connected to the carburetor 85 via a connecting tube 88, 91 an exhaust pipe extending from the upper front of the engine 81 toward the rear of the vehicle body, 92 a silencer connected to the rear end of the exhaust pipe 91, 93 a side stand, 94 A rear wheel attached to the rear end of the swing arm 67, 96 a rear fender that covers the rear wheel 94, and 97 a rear fender 96 Rear license plate was, the sheet attached to the upper portion of the seat rails 16, 16 98, 101 Pasenja grip, 102 is a tail lamp.
[0020]
FIG. 2 is a cross-sectional view showing a fuel tank and a vehicle body frame according to the present invention (the arrow in the figure indicates the front of the vehicle body; the same applies hereinafter), and an annular recess 131 is formed in the base 52 of the fuel tank 51. A steel pipe drain pipe 54 is connected to each of the annular recess 131 and the bottom plate 132 of the fuel tank 51, and one end of a rubber drain tube 56 is connected to a projecting portion 54a projecting the drain pipe 54 from the bottom plate 132 to the outside. The drain tube 56 extends downward along the lower portion of the main pipe 13 and the pivot plate 14.
[0021]
Reference numeral 136 denotes a cover member attached to the seat rails 16 and 16 (only the rear side reference numeral 16 is shown), which covers the upper side of the ignition coil 138 as an electrical component and holds the drain tube 56.
[0022]
FIG. 3 is a plan view showing the central part of the vehicle body according to the present invention. Cover members 136 are attached to the left and right seat rails 16 and 16, and the cover member 136 covers the ignition coil 138 (see FIG. 2). It shows that the drain tube 56 is held by the tube holding hole 281 as a guide portion opened at the front portion 136 and the harness coupler 282 is supported.
[0023]
Since the tube holding hole 281 is a portion that is formed when the cover member 136 is press-molded, the cost increase due to the provision of the tube holding hole 281 is small. Compared with attaching the holding member to the, an increase in cost can be suppressed.
[0024]
FIG. 4 is a plan view of the main part showing the cover member and its surroundings according to the present invention. A substantially H-shaped bracket 284 is attached to the lower part of one seat rail 16, and bolts 285 and 285 are attached to the H-shaped bracket 284. The U-shaped stay 286 is attached, and the arm portions 287 and 287 provided on the ignition coil 138 are attached to the U-shaped stay 286 with bolts 288 and 288, respectively.
The harness coupler 282 includes a male coupler 291 and a male coupler 292 connected to the male coupler 291.
[0025]
FIG. 5 is a cross-sectional view of a cover member according to the present invention. The cover member 136 is press-molded to form a recess 294 and a claw 295 close to the recess 294, and these recesses 294 are formed. In addition, the harness coupler 282 is held by the claw portion 295. Reference numerals 297 and 298 denote legs for attaching the rear part of the cover member 136 to the seat rails 16 and 16.
[0026]
FIG. 6 is a perspective view of the main part showing the drain tube holding according to the present invention. The first tube holding fitting 311 is attached to the lower side surface of the main pipe 13, and the second tube holding fitting 312 is attached to the rear upper portion of the pivot plate 14. By attaching the third tube holding fitting 313 to the lower rear portion of the pivot plate 14, the tube holding hole 281, the first tube holding fitting 311, the second tube holding hole 312 and the third tube holding fitting 313 of the cover member 136 are used. It shows that the drain tube 56 is held.
[0027]
FIGS. 7A and 7B are operation diagrams showing the operation of the drain tube according to the present invention.
(A) shows a state immediately after the drain tube 56 is attached to the fuel tank 51.
The drain tube 56 is inserted from the upper end 56a into the tube holding hole 281 of the cover member 136 from above, and is passed through the first tube holding fitting 311, the second tube holding fitting 312 and the third tube holding fitting 313 in this order. Is attached to the protruding portion 54 a of the drain pipe 54 before the drain tube 56 is attached to the body frame. Therefore, immediately after the drain tube 56 is attached to the fuel tank 51, the drain tube 56 is partially extended.
[0028]
In (b), a slack is produced by pulling the curved portion 56c between the first tube holding fitting 311 and the second tube holding fitting 312 horizontally as shown by an arrow in the substantially central portion of the drain tube 56, specifically the first tube holding fitting 311. , Eliminate partially stretched state. Thereby, it can prevent that the drain tube 56 is not crushed and an internal channel | path is obstruct | occluded.
[0029]
2 and 3, the present invention firstly exposes the drain pipe 54 to the lower portion of the bottom plate 132 of the fuel tank 51 and faces the lower end of the drain pipe 54 so that the body frame 11 ( In a motorcycle 10 (see FIG. 1) provided with a drain tube 56 on the side (see FIG. 1), an ignition coil 138 is attached to the vehicle body frame 11 below the fuel tank 51, specifically the seat rails 16, 16, and this ignition coil 138. The drain tube 56 is held by a tube holding hole 281 provided in the cover member 136.
[0030]
The drain tube 56 can be held by the cover member 136 that covers the ignition coil 138, and the number of parts can be reduced. Further, since the drain tube 56 is held by the tube holding hole 281 of the cover member 136, it is not necessary to change the drain tube 56, and a commercially available product can be used as the drain tube 56. Therefore, the cost increase of the motorcycle 10 can be suppressed.
[0031]
Furthermore, if the drain tube 56 is held by the cover member 136 and the drain tube 56 is directly connected to the drain pipe 54, the drain tube 56 will not be displaced with respect to the drain pipe 54, and the drain pipe 54 The drain tube 56 can be reliably connected.
[0032]
Second, the present invention is characterized in that the harness coupler 282 is supported by the cover member 136.
There is no need to provide a special support member for the harness coupler 282, and the number of parts can be further reduced.
[0033]
Third, the present invention is characterized in that the electrical component is an ignition coil 138.
By covering the ignition coil 138 with the cover member 136, it is possible to prevent the ignition coil 138 from being exposed to rainwater. Therefore, the reliability of the motorcycle 10 can be improved.
[0034]
In the present invention, the drain tube holding portion is provided in the cover member that covers the upper side of the ignition coil. However, the present invention is not limited to this, and the cover member that covers other electrical components (for example, the engine control unit and the battery) is provided. Also good.
[0035]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
In the fuel tank drain structure for a motorcycle according to claim 1, an electrical component is attached to a vehicle body frame below the fuel tank, the upper portion of the electrical component is covered with a cover member, and a drain tube is held by a tube holding hole provided in the cover member. The drain pipe is protruded from the bottom plate to the outside, the drain tube is extended downward along the lower part of the main pipe and the pivot plate constituting the body frame, and the drain tube is the tube of the cover member from above. Pass through the holding hole and tube holder in order, connect the end of the drain tube to the protruding part of the drain pipe, and pull the curved part at the center of the drain tube horizontally to generate looseness. The cover member that covers the product can also be used, and the number of components can be reduced. Further, since the drain tube is held by the guide portion of the cover member, it is not necessary to change the drain tube, and a commercially available product can be used as the drain tube. Therefore, an increase in the cost of the motorcycle can be suppressed.
[0036]
Furthermore, if the drain tube is held by the cover member and the drain tube is directly connected to the drain pipe, the drain tube will not be displaced with respect to the drain pipe, and the drain tube is securely connected to the drain pipe. be able to.
[0037]
In the fuel tank drain structure of the motorcycle according to claim 2, since the harness coupler is supported by the cover member, it is not necessary to provide a special support member for the harness coupler, and the number of parts can be further reduced.
[0038]
In the fuel tank drain structure of the motorcycle according to claim 3, since the electrical component is an ignition coil, it is possible to prevent the ignition coil from being exposed to rainwater by covering the ignition coil with a cover member. Therefore, the reliability of the motorcycle can be improved.
[0039]
In the fuel tank drain structure for a motorcycle according to claim 4, the drain tube is inserted into the tube holding hole of the cover member from the top to the first tube holding bracket, the second tube holding bracket and the third tube holding bracket from above. In order, slack is generated by horizontally pulling the curved portion between the first tube holding metal fitting and the second tube holding metal fitting.
[0040]
In the fuel tank drain structure for a motorcycle according to claim 5, an electrical component is attached to the vehicle body frame below the fuel tank, the upper portion of the electrical component is covered with a cover member, and the drain tube is held in a tube holding hole provided in the cover member. The drain pipe is projected from the bottom plate to the outside, and the drain tube is passed from the top through the tube holding hole of the cover member and the tube holding bracket in order, and before attaching the fuel tank to the vehicle body frame, When the rear end is connected to the protruding part, the curved part of the central part of the drain tube that becomes partially extended immediately after connection is pulled horizontally to cause slack, and the partially extended state is eliminated. Therefore, the drain tube can be held by the cover member that covers the electrical component, and the number of components can be reduced. Further, since the drain tube is held by the guide portion of the cover member, it is not necessary to change the drain tube, and a commercially available product can be used as the drain tube. Therefore, an increase in the cost of the motorcycle can be suppressed.
[0041]
Furthermore, if the drain tube is held by the cover member and the drain tube is directly connected to the drain pipe, the drain tube will not be displaced with respect to the drain pipe, and the drain tube is securely connected to the drain pipe. be able to.
[Brief description of the drawings]
FIG. 1 is a side view of a motorcycle adopting a fuel tank drain structure according to the present invention. FIG. 2 is a sectional view showing a fuel tank and a vehicle body frame according to the present invention. FIG. 4 is a plan view of a main part showing a cover member according to the present invention and its periphery. FIG. 5 is a cross-sectional view of the cover member according to the present invention. FIG. 6 is a main part showing holding of a drain tube according to the present invention. FIG. 7 is an operation view showing the operation of the drain tube according to the present invention. FIG. 8 is a cross-sectional view showing a conventional fuel tank drain structure of a motorcycle.
DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 11 ... Body frame, 13 ... Main pipe, 14 ... Pivot plate, 16 ... Seat rail, 51 ... Fuel tank, 54 ... Drain pipe, 54a ... Projection part, 56 ... Drain tube, 56c ... Drain tube curved portion, 132 ... fuel tank bottom plate of, 136 ... cover member, 138 ... electric component (ignition coil), 281 ... tubing holding hole, 282 ... harness coupler, 311, 312, 313 ... tube retaining bracket (the first tube holding Bracket, second tube retaining bracket, third tube retaining bracket) .

Claims (5)

In a motorcycle in which a drain pipe is exposed at the bottom of the bottom plate of the fuel tank and a drain tube is provided on the body frame side so as to face the lower end of the drain pipe,
An electrical component is attached to the vehicle body frame below the fuel tank, the upper portion of the electrical component is covered with a cover member, and the drain tube is held by a tube holding hole provided in the cover member ,
Providing a protruding part that protrudes the drain pipe from the bottom plate to the outside,
The drain tube extends downward along the lower part of the main pipe and the pivot plate constituting the body frame,
The drain tube is passed through the tube holding hole and tube holding bracket of the cover member in order from above,
Connect the end of the drain tube to the protruding part of the drain pipe ,
A fuel tank drain structure for a motorcycle, wherein a slack is generated by horizontally pulling a curved portion of a central portion of the drain tube .   The fuel tank drain structure for a motorcycle according to claim 1, wherein a harness coupler is supported by the cover member.   The fuel tank drain structure for a motorcycle according to claim 1, wherein the electrical component is an ignition coil. The drain tube is inserted from the top into the tube holding hole of the cover member from above, and sequentially passed through the first tube holding bracket, the second tube holding bracket and the third tube holding bracket, and the first tube holding bracket and the first tube The fuel tank drain structure according to claim 1, wherein a slack is generated by horizontally pulling a curved portion between the two tube holding fittings. In a motorcycle in which a drain pipe is exposed at the bottom of the bottom plate of the fuel tank and a drain tube is provided on the body frame side so as to face the lower end of the drain pipe,
An electrical component is attached to the vehicle body frame below the fuel tank, the upper portion of the electrical component is covered with a cover member, and the drain tube is held by a tube holding hole provided in the cover member,
  Providing a protruding part that protrudes the drain pipe from the bottom plate to the outside,
  The drain tube is passed through the tube holding hole of the cover member and the tube holding bracket in order from above,
  Before attaching the fuel tank to the vehicle body frame, when the rear end portion of the drain tube is connected to the projecting portion, the curved portion of the central portion of the drain tube that is partially extended immediately after connection is horizontally The fuel tank drain structure is characterized in that the slack is generated by pulling to the position and the partially extended state is eliminated.

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