JP2847440B2 - Scooter type vehicle fuel pump installation structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel pump installation structure for a scooter type vehicle.

[0002]

2. Description of the Related Art A fuel tank in a scooter type vehicle is:
Generally, fuel is supplied to the engine by gravity by being placed above the engine.However, when a large storage box or the like is placed above the engine, the fuel tank is installed at a low position such as the lower part of the floor, and Fuel is supplied to the engine by a fuel pump provided in the vicinity (for example, Japanese Utility Model Laid-Open No. 1-106385).

However, when the fuel pump is provided at such a position, the space used for the fuel tank or the floor is limited, and it is difficult to provide a large-capacity fuel tank or a floor with a sufficient space.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above disadvantages.

[0005]

According to a first aspect of the present invention, a storage box is fixed to upper portions of left and right side frames at the rear of a floor and a lower portion of the side frames. , The power unit with the cylinder head of the engine facing forward is pivoted substantially horizontally,
In a scooter-type vehicle having a fuel tank installed below the floor, brackets are protruded on each of the left and right side frames, and the front part of the storage box is connected to the left and right brackets through holes provided in the bottom of the storage box. stop and screws, and across to the left and right of the bracket, Shirindahe
Bypass the space between the top of the storage box and the bottom of the storage box
Fix both ends of the pump stay curved to the
A fuel pump located between the storage box and the engine is detachably attached to the front of the table.

[0006]

With the above construction, the floor can be widened even if the large-capacity fuel tank is installed at a low position, and the space between the cylinder head and the bottom of the storage box can be used for installing the fuel pump. Further, by removing the storage box, the engine can be inspected and maintained.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, A is a scooter-type vehicle, 1 is a frame of the scooter-type vehicle, and includes a head pipe 2, a down tube 3, and a side frame 4. The side frame 4 extends right and left rearward from a lower portion of the down tube 3, and It is inclined upward at a large angle, and its rear end is integrally joined to the right and left by a joining member 5. A cross member 6 at the front end connects the left and right side frames 4, 4 to the lower end of the down tube 3, and 7
Has a shallow U-shape as an intermediate cross member, and the welded portion with the side frame 4 is such that the insides of the pipes are in communication with each other through an opening 8 shown in FIGS. .

Further, an air inlet 9 is provided above the down tube 3, and an air outlet 10 is provided to project from the rear surface of the intermediate cross member 7, so that cooling air is sent into the power unit 12 by the tube 11. .

The power unit 12 has an engine 13 covered with an engine cover 13a at the front and a transmission 14 at the rear.
Which drives the rear wheel 15 and has a cylinder head 16
And the frame is connected to the frame 1 substantially horizontally with the ignition plug 17 facing forward. A bracket 19 extending from the power unit 12 is connected to a link 21 provided on the frame 1 via a pivot 20 so that the power unit 12
A shock absorber 23 is provided between the rear portion of the cross member 22 and the cross member 22.

A fuel tank 25 is fixed below the position of the side frame 4 where the floor is provided, and is closed by a cap 26. Brackets 28 and 29 for fixing the storage box 27 are provided at positions above the power unit 12 in the side frame 4. On the front surface of the front bracket 28, the front side of the front side of the cylinder head 16 is extended forward . Both ends of a curved arcuate pump stay 30 are fixed with screws 31, and a fuel pump 33 is screwed into a mounting seat 32 protruding from the front of the stay 30.
Fixed at. The fuel in the fuel tank 25 is
And is sucked into the fuel pump 33 through the strainer 36,
It is supplied to the carburetor of the engine 13.

The mounting position of the fuel pump 33 is preferably deviated to one side from the center of the vehicle body as shown in FIG.
Thus, the pump 33 can be moved away from the swing range of the center line of the power unit 12 to avoid interference. Further, a step bracket 37 having a flat upper surface and opening inward is fixed to a position on the left side frame 4 substantially opposite to the fuel pump 33, and an ignition coil 38 is housed by utilizing the inside thereof. Spark plug 1 with cable 39
7 is connected.

The upper portion of the fuel tank 25 is covered with a floor panel 40 to form a floor 41. The center cover 42 covers the engine 13, the fuel pump 33, the storage box 27 and the like from the front to the side.
A fuel supply chamber 43 is provided to surround the fuel supply port 25a and the cap 26, and the ignition plug 17 can be operated or inspected. In the figure, 44 is an air cleaner, 45 is a vaporizer, and 46 is a lid that also serves as a sheet.

The fueling chamber 43 will be described in more detail. As shown in FIGS. 5 and 6, a hole 47 is provided for the floor panel 40 to extend into the chamber 43 and project the fueling port 25a. An outer opening 50 is provided at 42, and a refueling chamber 43 is formed inside the refueling port 25 a of the tank 25 and an inner wall 51 extending to the depth of the cap 26, and an upper portion of the inner wall 51 facing the spark plug 17 is formed inside. An opening 52 is opened.

An inner lid 53 for opening and closing the internal opening 52 has
A stopper 54 and a ridge 55 project from the lower part, and can be elastically engaged with the receiving hole 54a and the groove 55a provided in the inner wall 51, respectively. 56 is a knob used in the early stage of opening the lid.
An outer lid 57 for opening and closing the external opening 50 is connected by a hinge 58, and the lock member 59 is engaged with and disengaged from the stop hole 60. Therefore, the filler port 25a and the cap 2
6 is surrounded by an inner wall 51, an inner lid 53, an outer lid 57 and the floor panel 40, and is prevented from being contaminated by dust or the like from the road surface. Outer lid 5 when refueling
7 can be opened, and when checking the spark plug 17, the inner lid 53 can be opened further.

[0015]

As described above, according to the present invention, the fuel tank is provided on the lower surface of the footrest portion, and the fuel pump is formed between the front portion of the cylinder head remote from the fuel tank and the storage box. Since it is installed in a space where it can be installed, the floor space and the space for the fuel tank can be made large, and there is an advantage that a large floor for a foot can be formed and a large-capacity fuel tank can be provided. Also, use left and right blocks to screw the front of the storage box.
Use racket to fix both ends of pump stay
Et al., Pump stays dedicated bracket is unnecessary der Rutotomoni
The pump stay is firmly fixed. And the pumps
The table is located between the top of the cylinder head and the bottom of the storage box.
Curved forward, bypassing the space of
, Which hinders cylinder head swing.
Virtually increase the space above the cylinder head
It will be done. This increases storage box capacity
Or cylinder head swing, ie power unit
This has the advantage that the amount of swing of the can be increased. The storage box can be easily removed by removing the screws at the bottom of the storage box, which exposes the fuel pump and the engine.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of a main part.

FIG. 4 is a plan view of the same.

FIG. 5 is a longitudinal sectional view of a fueling chamber.

FIG. 6: Slope view

[Explanation of symbols]

1 frame 4 side frame 12 power unit 13 engine 16 cylinder head 17 spark plug 25 fuel tank 27 storage box 28 bracket 30 pump stay 33 fuel pump 41 floor 45 carburetor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-132492 (JP, A) JP-A-1-106383 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B62J 37/00 B62J 35/00 B62J 9/00 B62K 11/00

Claims (1)

(57) [Claims] 1. A storage box is fixed to the upper part of left and right side frames at the rear of the floor, and a power unit having a cylinder head of an engine facing forward is pivotally mounted substantially horizontally at the lower part of the side frame. In a scooter-type vehicle provided with a fuel tank, brackets are provided on each of the left and right side frames, and the front portion of the storage box is connected to the left and right brackets through holes provided in the bottom of the storage box. screwed into and to the left and right brackets
Straddling the top of the cylinder head and the bottom of the storage box
Pump stays curved forward, bypassing the space between
A fuel pump installation structure for a scooter type vehicle , wherein an end is fixed, and a fuel pump located between a storage box and an engine is detachably attached to a front portion of the pump stay .