JP2598789B2 - Vehicle fuel injection structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fuel injection structure of a vehicle for improving the outer appearance of a peripheral portion of a tank cap portion exposed at a tank cover opening.

(Prior art) Some vehicles cover the fuel tank with a bonnet or the like,
The cap of the fuel tank is exposed in an opening such as a bonnet (see, for example, the public relations of Japanese Utility Model Publication No. 54-12164).

Particularly in a motorcycle, the fuel tank is covered with a tank cover together with an air cleaner, and the tank cap is exposed to the opening of the tank cover in consideration of the convenience of fuel injection into the fuel tank.

(Problems to be Solved by the Invention) However, since the diameter of the tank cover opening of the motorcycle is larger than the diameter of the tank cap, a gap is formed between the tank cover and the tank cap, and this gap is directly exposed to the outside. There was a problem that the appearance was reduced due to exposure.

Also, since the tank cover and the fuel tank are supported by separate support systems, it is difficult to align the tank cover opening with the tank cap, and the tank cover opening comes into contact with the tank cap due to vibration and noise. There was also a problem that occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle fuel injection unit structure capable of improving appearance, absorbing an assembly error, and preventing vibration and noise. It is in.

(Means for Solving the Problems) In order to achieve the above object, the present invention comprises a fuel tank elastically supported by a vehicle body frame, which is entirely covered with a tank cover, and the tank cover is attached to at least the vehicle body frame. A structure provided in a vehicle, wherein a tank cap detachably mounted on the fuel tank is exposed so as to be substantially flush with an opening formed in the tank cover so as to surround the tank cap. A ring-shaped frame is fixedly attached to the fuel tank, and a ring-shaped lid member surrounding the upper end of the tank cap with a predetermined gap formed therebetween is mounted on the frame so as to surround it. The lid member and the frame body sandwich the periphery of the opening of the tank cover.

(Operation) According to the present invention, since the frame body and the lid member are both fixed to the fuel tank, the positional relationship between the tank cap and the lid member is always constant and invariable, and both are always arranged concentrically. A constant gap is always formed between the two, and the gap between the opening of the tank cover and the frame is covered with the lid member and cannot be seen from the outside, so that the appearance around the tank cap is enhanced.

In addition, at the time of assembly, the tank cap, the frame, and the lid member can move integrally with the tank cover. Therefore, even when the support system of the tank cover and the fuel tank is different, the tank cap, the frame, and The assembly error can be effectively absorbed by the integral movement of the lid member with respect to the tank cover.

Further, as described above, the tank cap and the lid member are both attached to the fuel tank, and a constant gap is always formed between the two, so that they do not come into contact with each other. Since it is sandwiched between the frame and the lid member, generation of vibration and noise is prevented.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

First, the outline of the structure of a motorcycle having the fuel injection structure according to the present invention will be described with reference to FIG.

In FIG. 11, reference numeral 1 denotes a main frame, and a head pipe 2 is fixed to a front portion of the main frame 1. And, in the head pipe 2, the stem shaft 3
Is rotatably inserted, and a handle 4 is fixed to the upper end of the stem shaft 3. An upper end of a front fork 5 is fixed to the stem shaft 3, and a front wheel 6 has a front axle 8 at the lower end of the front fork 5.
Is rotatably supported.

On the other hand, an engine 9 serving as a driving source is mounted at a substantially central position of the vehicle body. An air cleaner 10 and a carburetor 11 are connected to an intake system of the engine 9, and an exhaust pipe 12 is connected to an exhaust system. I have.

A fuel tank 13 is disposed behind the air cleaner 10, and the air cleaner 10 and the fuel tank 13 are covered by a tank cover 14. Further, a seat 15 is disposed behind the fuel tank 13.

Further, a front end of a rear arm 17 is pivotally mounted on a bracket 16 connected to the main frame 1 by a pivot shaft 18 so as to be vertically rotatable. A rear wheel 19 is attached to a rear end of the rear arm 17. Is rotatably supported. still,
The rear arm 17 is connected to a rear cushion 22 via a link mechanism 21.
At the vehicle side.

Here, FIG. 1 to FIG.
This will be described with reference to FIG. FIG. 1 is a plan view of a tank cover of a motorcycle, and FIGS. 2, 3, and 4 are cross-sectional views taken along lines II-II, III-III, and IV-IV of FIG. 1, respectively.
FIG. 5 is a partially cutaway side view of the tank cover, FIG. 6 is a sectional view taken along the line VI-VI of FIG. 5, FIG. 7 is a side view showing a fuel tank mounting structure, FIG. FIG. 10 and FIG. 10 are sectional views taken along lines VIII-VIII, IX-IX and XX of FIG. 7, respectively.

Thus, the tank cover 14 is shown in FIG. 1 and FIG.
It is supported by a, b, b, and c points, for a total of four points. That is, at the point a at the front end, the main frame 1 is supported by the fastener 23, and at the point b at both sides thereof, a bracket 24 projecting from the side wall of the fuel tank 13 is screwed as shown in FIG. The seat rail frame is elastically supported by a bolt 25 to be attached via a grommet 26 at a point c at the rear end as shown in FIG.
It is elastically supported via a grommet 31 by a bolt 30 screwed to a bracket 29 fixed to a stay 28 (see FIG. 1) which is laid horizontally on 27. The bolt 30 also fastens the front end of the seat 15 together.

On the other hand, the fuel tank 13 is supported at a total of three points d, e, and e shown in FIG. 7, and its upward rotation is prevented at the point f. That is, at a point d at the front end, a bolt inserted into a bracket 33 connected to the cross pipe 32 as shown in FIG.
At the point e, a damper member is attached to the seat rail frame 27 as shown in FIG.
It is elastically supported through 35. And, at point f,
As shown in FIG. 10, a bracket 37 projecting from the fuel tank 13 is brought into contact with a damper member 36a supported on a lower surface of a bracket 36 attached to a stay (not shown), so that the upper part of the fuel tank 13 is Is prevented from rotating.

As shown in FIG. 5, a rubber member 38 having a dual structure of a vibration damping material and a sound absorbing foam is attached to the back surface of the tank cover 14, and the rubber member 38 is attached to the air cleaner 10 as shown in FIG. Are held in contact. Thus, the vibration of the air cleaner 10 is suppressed by the vibration damping effect of the rubber member 38, and the transmission of the noise generated by the engine 9 to the rider side is blocked by the sound absorbing effect.

By the way, at the top of the fuel tank 13, FIG.
As shown in detail in the figure, a fuel supply pipe 39 is fixed, and an opening of the fuel supply pipe 39 has a tank cap.
40 are detachably mounted. Then, on the outer periphery of the protruding portion of the fuel supply pipe 39 facing above the fuel tank 13,
A ring-shaped frame 41 surrounding the tank cap 40 is fixed, the frame 41 has an outer frame 41a fixed to the outer peripheral portion of the fuel supply pipe 39, and a bolt 42 and a nut attached to the outer frame 41a. And an inner frame 41b bound at 43.

On the other hand, a circular opening 14a in which the tank cap 40 is to be exposed substantially flush with the tank cover 14 is formed, and the opening 14a is larger than the opening of the frame 41. Therefore, a gap is formed between the opening 14a of the tank cover 14 and the frame 41, and a ring-shaped lid member 44 covering the gap is fixed to the frame 41 with screws 45. I have. Then, between the tank cover 14 and the lid member 44 and the tank cover
Elastic bodies 46 and 47 are interposed between the frame 14 and the frame 41, respectively. As shown in FIG. 2, a breather tube 48 is connected to the lowermost portion of the outer frame 41a of the frame 41, and the outer frame 41a
The fuel or rainwater accumulated in the tank is discharged to the outside through the breather tube 48.

In the above, both the frame body 41 and the lid member 44
Therefore, the positional relationship between the tank cap 40 and the lid member 44 is always constant and invariable, the two are always arranged concentrically, and a constant gap is always formed between the two. Since the gap between the opening 14a of the cover 14 and the frame body 41 is covered by the lid member 44 and cannot be seen from the outside, the appearance around the tank cap 40 and the appearance are enhanced.

Also, at the time of assembly, since the tank cap 40, the frame body 41, and the lid member 44 can move integrally with the tank cover 14, even if the support system of the tank cover 14 and the fuel tank 1 is particularly different, The assembly error can be effectively absorbed by the integral movement of the tank cap 40, the frame 41, and the lid member 44 with respect to the tank cover 14.

Further, as described above, both the tank cap 40 and the lid member 44 are attached to the fuel tank 13 and a constant gap is always formed between the two, so that they do not come into contact with each other,
Further, the opening 14a of the tank cover 14 is sandwiched between the frame 41 and the lid member 44 via the elastic members 46 and 47 in the middle, so that generation of vibration and noise is prevented.

In the above embodiment, the lid member 44 is screwed to the frame 41. However, as shown in FIG. 12, the lid member 44 may be screwed at the portion a to be fixed to the frame 41. it can.

(Effects of the Invention) As is apparent from the above description, according to the present invention, a ring-shaped frame surrounding the tank cap is fixed to the fuel tank, and the outer periphery of the upper end of the tank cap is fixed to the fuel tank. A ring-shaped lid member is formed on the frame so as to surround and form a predetermined gap therebetween, and the lid member and the frame sandwich the peripheral edge of the opening of the tank cover to inject fuel into the vehicle. Because of the structure of the part, it is possible to improve the appearance of the fuel injection part, absorb an assembly error, and prevent the generation of vibration and noise.

[Brief description of the drawings]

FIG. 1 is a plan view of a tank cover of a motorcycle, and FIG.
FIG. 3, FIG. 3 and FIG. 4 are respectively II-II line and III line of FIG.
-III line, IV-IV line sectional view, Fig. 5 is a partially cutaway side view of the tank cover part, Fig. 6 is a VI-VI line sectional view of Fig. 5,
FIG. 7 is a side view showing the mounting structure of the fuel tank, FIG.
9 and 10 are lines VIII-VIII and IX- of FIG. 7, respectively.
FIG. 11 is an overall side view of the motorcycle, and FIG. 12 is a view similar to FIG. 3 showing a modified embodiment of the present invention. 13 …… Fuel tank, 14 …… Tank cover, 14a …… Tank cover opening, 40 …… Tank cap, 41 …… Frame,
44 ... lid member, 46, 47 ... elastic body.

Claims (2)

(57) [Claims] 1. A structure provided in a vehicle in which a fuel tank elastically supported by a vehicle body frame is entirely covered with a tank cover, and the tank cover is attached to at least the vehicle body frame, and is detachably mounted on the fuel tank. The exposed tank cap is exposed to the opening formed in the tank cover so that both are substantially flush with each other, and a ring-shaped frame surrounding the tank cap is fixed to the fuel tank, and the tank cap is A ring-shaped lid member surrounding the upper end of the tank with a predetermined gap formed therebetween is attached on the frame body, and the lid member and the frame body surround the opening of the tank cover. A fuel injection part structure for a vehicle, characterized in that a fuel injection part is sandwiched between the fuel injection part and the vehicle. 2. A fuel injection part structure for a vehicle according to claim 1, wherein an elastic body is interposed between said tank cover and said lid member and between said tank cover and said frame.