JP3127305B2 - Cock opening and closing structure of foldable motorcycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable motorcycle in which a front frame for supporting front wheels and a rear frame for supporting rear wheels are fitted to extend and contract back and forth.
The present invention relates to a structure for automatically opening and closing a cock provided on the rear frame when both frames expand and contract.

[0002]

2. Description of the Related Art In order to carry a motorcycle in a narrow space such as a trunk of an automobile and transport the motorcycle, a body frame of the motorcycle has a front frame having front wheels and a steering wheel, and a rear frame having rear wheels and a power unit. Japanese Patent Application No. 1-152285 has already proposed a structure in which the frame is divided into frames and both frames are elastically fitted back and forth.

[0003]

However, in the above-mentioned motorcycle, it is necessary to close the switching cock of the fuel system every time the vehicle body frame is folded and open the switching cock every time the vehicle body frame is assembled. There is an inconvenience.

The present invention has been made in view of the above circumstances, and has as its object to automatically open and close a cock provided in a foldable motorcycle in conjunction with expansion and contraction of a frame thereof.

[0005]

In order to achieve the above object, a cock opening / closing structure for a foldable motorcycle according to the present invention comprises a front frame supporting a front wheel and a rear frame supporting a rear wheel, which can be extended and contracted back and forth. In a foldable motorcycle which is fitted to a rear frame, a cock having a lever is provided on a rear frame, and
Providing a pair of front and rear engagement parts facing each other across the lever,
When the two frames are extended, the levers are
Press to open the cock, and when both frames contract
Is characterized in that the cock is closed by pressing the lever by the engagement portion on the front side .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view at the time of assembling the foldable motorcycle, and FIG. 2 is a side view at the time of the foldable motorcycle. As is apparent from FIG. 1, the foldable motorcycle V has a steering wheel including a front wheel Wf. Front frame 1 that supports heading
And a rear frame 2 supporting a drive system including the rear wheels Wr.

As is apparent from FIG. 3 together with FIG.
The front frame 1 includes a pair of left and right band-shaped side plates 3 facing each other at a predetermined interval, and a handle post 4 vertically penetrates the front end of the side plates 3. That is, the handle post 4 is supported by a head pipe 5 fixed between the side plates 3 so as to be rotatable left and right, and a lower shaft 7 that supports a front wheel Wf via a front fork 6 at a lower portion, and the lower shaft 7. An upper shaft 11 is pivotally supported by a folding pin 8 at the upper end so as to be able to swing back and forth, and supports a steering handle 10 via a steering shaft 9 at the upper portion thereof. At the upper end of a bracket 12 fixed to the front end of the side plate 3, a connecting arm 14 extending rearward of the vehicle body via a folding pin 13 coaxially arranged with the folding pin 8 is supported so as to be swingable back and forth. A locking means L is provided between the intermediate portion of the arm 14 in the front-rear direction and a bracket 15 provided on the upper surface of the side plate 3 so as to be detachable by pin connection. Therefore, by operating the lock means L, it is possible to hold the upper shaft 11 of the handle post 4 at the assembly position (see FIG. 1) standing upright on the lower shaft 7, and the function of the lock means L Is released, the upper shaft 11 is swung rearward about the folding pin 8 and, at the same time, the connecting arm 14 is folded together with the upper shaft 11 by the folding pin 13.
And the steering shaft 9 can be stored in a folded position along the upper surface of the front frame 1 (see FIG. 2). At this time, by folding the left and right steering handles 10 about the shaft 16 downward (positions of the steering handles 10 along the left and right sides of the steering shaft 9), the entire width can be accommodated within the width of the front frame 1. it can.

The rear frame 2 includes a pair of left and right parallelogram-shaped side plates 17 facing each other at a predetermined interval, and a pair of front and rear rollers 18 and 19 are supported outward on the upper side of each side plate 17. . On the other hand, the inner surfaces of the left and right side plates 3 of the front frame 1 have guide grooves 3 ₁ , 3 extending in the front-rear direction.
_The front and rear rollers 18 and 19 are rotatably engaged with the guide grooves 3 ₁ and 3 ₂ , and the rear end of the connecting arm 14 and the front end of the rear frame 2 are connected to the link 2.
0. Accordingly, when the steering shaft 9 of the handle post 4 is swung rearward to be folded, the rear frame 2 is pulled forward through the link 20 and moves to the folded position (see FIG. 2).
Conversely, when the steering shaft 9 is raised, the link 20
The rear frame 2 pressed by the lever moves backward and moves to the assembly position (see FIG. 1). In this case, the folding position and the assembly position, a pair of protrusions 17 ₁ 17 ₂ before and provided on the outer surface of the side plate 17 of the rear frame, respectively fitted in the recess 3 _3, 3 ₄ formed in the side plate 3 of the front frame 1 Thus, play in the vertical direction between the front frame 1 and the rear frame 2 is prevented at both positions.

[0010] Seat 2 provided at the rear of the body frame
1 has a rear end connected to the front frame 1 via a link 22 and a front end connected to the rear frame 2 via a link 23. Therefore, when the rear frame 2 is at the assembly position retracted with respect to the front frame 1, the two links 22 and 23 stand up and rise to a position where the seat 21 can be used, and the rear frame 2 is attached to the front frame 1. On the other hand, when it is in the advanced folded position, the links 22 and 23 fall down and the sheet 21 is stored in the lowered position.

A power unit P, in which a single-cylinder two-stroke internal combustion engine E and a transmission (not shown) are integrated, is suspended and supported at the front of the rear frame 2, and a rear wheel pivotally supported at the rear end of the rear frame 2. Wr is connected to the power unit P via a chain 24.

A fuel tank 25 is provided above the rear frame 2.
The fuel tank 25 and the oil tank 26 move along a space formed between the left and right side plates 3 of the front frame 1 when the rear frame 2 slides. An air cleaner 27 and a carburetor 2 are provided between the fuel tank 25 and the power unit P.
8, and a switching cock 29 described later, which opens and closes in conjunction with the expansion and contraction of the frames 1 and 2 are provided. Further, the lower portion of the power unit P are covered exhaust pipe 30 extending rearward from the engine E is沿設exhaust pipe cover 54, further its exhaust pipe 30 is connected to a muffler 31 having a tail pipe 31 _1. The selector valve 29 has a lever 29 ₁ for opening and closing extending upward to actuate the lever 29 _first selector valve 29 with the rear frame 2 slides on the lower surface of the side plate 3 of the front frame 1,
Pair of engaging portions 3 before and after the opposite sides of the said lever 29 _1
5, 3 ₆ are projected.

As shown in detail in FIGS. 4 and 5, the side plate 17 of the rear frame 2 has an opening 1 extending in the longitudinal direction of the vehicle body.
7 ₃ has stepped bent as in the boundary upper positioned inside the lower portion, by polymerizing top of the side plate 17 on the inner side of the side plate 3 of the front frame 1, the bottom surface of the side plate 17 And the surface of the side plate 3 of the front frame 1 is arranged substantially flush. The selector valve 29 is bolted to the two bosses 17 _4, 17 ₅ projecting from the side plate 17 of the rear frame 2, the selector valve 29
From the upper end of the lever 29 ₁ extending upwardly abuts the engaging portion _35, 3 ₆ in the opening portion 17 ₃ formed in the side plate 17 of the rear frame 2. Note that the engagement portions 3 ₅ and 3
Inside the side plate 3 of _6, relief 3 _7, 3 ₈ to avoid interference with the lever 29 ₁ is recessed. Further, four additional openings 17 are provided at the center of the side plate 17 of the rear frame 2.
₆ is formed to cool the muffler 31 disposed inside and reduce the weight of the vehicle body.

[0014] As shown in FIGS. 6 and 7, the selector valve 29 governs the opening and closing of the automatic cock 32 which is interposed in the fuel supply passage L ₁ connecting the fuel tank 25 and the carburetor 28, the automatic cock 32 and the intake manifold 33 of the internal combustion engine E are connected to the negative pressure passage L ₂ ,
Port P _1, port P _2, can be communicated through the negative pressure passage L _3. A gas-liquid separation separator 35 provided inside a relief valve 34 provided above the fuel tank 25 is connected to a port P ₃ of the switching cock 29 via a tank breather passage L ₄ and an air vent passage L ₅ from the carburetor 28. is connected to the port P ₄ of the selector valve 29, the two ports P _3, P ₄ is the atmosphere open passage L via the port P ₅
Can communicate with ₆ . Then, the relief valve 34 of the gas-liquid separator the separator 35 is communicated with the air cleaner 27 through the relief passage L _7.

Next, the structure of the lock means L will be described in detail with reference to FIGS. The locking means L is a motorcycle V
Is used to hold the upper half of the handle post 4, that is, the upper shaft 11 and the steering shaft 9 in the upright position when the upper shaft 1 is assembled.
1 and a bracket 15 provided on the front frame 1 so as to be removably connected to each other.

[0016] The boss 14 ₁ formed on the right and left side surfaces of the connecting arm 14 and fitted to disengageably into the pin hole 15 ₁ formed in the bracket 15 provided in the front frame 1 2
The lock pins 40 are slidably supported. A shaft 42 connected to the lower end of an operation lever 41 operated by the rider's hand is rotatably supported between the two lock pins 40, and a central portion of the lock lever 43 is fixed to the lower end of the shaft 42. . Between the distal end of the lock lever 43 and the proximal end of the lock pin 40, both ends of a link 45 having a central portion pivotally supported by a shaft 44 are connected via connection pins 46 and 47, respectively. Both ends of the central portion the spring 48 tension is between the spring receiving 45 ₁ provided integrally on the both links 45 is locked, thereby the inoperative position and operative position of FIG. 9 in FIG. 8 the lock pin 40 A toggle mechanism for stably biasing any one is configured.

The ignition switch 49 is provided in front of the locking means L of the connecting arm 14, the key insertion opening 49 ₁ is covered by the operation lever 41 in the inoperative position (see FIG. 8). The ignition switch 49 is provided with a handle lock pin 50 that protrudes and retracts toward the front of the vehicle body, and the handle lock pin 50 is welded to the upper shaft 11 with the key K removed. By fitting them into ₁ , the operation of the steering handle 10 is regulated.

Next, the operation of the above-described embodiment of the present invention will be described.
Will be explained. Motorcycle V assembled as shown in FIG.
When the motorcycle V is running,
Frame 2 slides backward with respect to front frame 1
Installed on the side plate 3 of the front frame 1
Engagement part 3 on the rear side of the beam₆With lever 29₁Is pushed forward
Then, the switching cock 29 is opened (see FIG. 6). to this
Thus, the negative pressure chamber of the auto cock 32 is connected to the negative pressure passage L._Two, Po
To P₁, Port P_Two, Negative pressure passage L_ThreeThrough engine E
Connected to the intake manifold 33 of
The fuel tank 25 is opened and the fuel in the fuel tank 25 is
Road L₁Is supplied to the carburetor 28. This and
Extending from the gas-liquid separation separator 34 of the fuel tank 25
Tank breather passage L_FourIs port P_Three, Port P_FiveTo
Through the atmosphere open passage L₆And carburetor
Air vent passage L extending from _FiveIs port P_Four,
Auto P_FiveThrough the atmosphere open passage L₆To the motorcycle
The vehicle V is in a state where the fuel supply system can run.

When the motorcycle V is folded as shown in FIG. 2 so as to be housed in a trunk of the automobile, the rear frame 2 slides forward with respect to the front frame 1. lever 29 ₁ by the front engaging portion ₃₅ provided on the 3 selector valve 29 is pushed rearward is closed (see FIG. 7). Thereby, the communication between the negative pressure chamber of the auto cock 32 and the intake manifold 33 is cut off, and the auto cock 32 is connected to the negative pressure passage L ₂ , the port P ₁ , the port P ₃ , the tank breather passage L ₄ , the gas-liquid separator 35. Through the fuel tank 2
Connect to 5. As a result, the negative pressure chamber of the auto cock 32 is maintained at the same pressure as that of the inside of the fuel tank 25 and closed.
Fuel supply from the fuel tank 25 to the carburetor 28 is reliably shut off. At the same time, the tank breather passage L ₄ of the fuel tank 25 and the air vent passage L of the carburetor 28
₅ is cut off from the atmosphere open passage L _6, even if the motorcycle V sideways posture fuel or fuel vapor is prevented from leaking outside. Incidentally, in the state where the selector valve 29 is closed, the internal pressure of the fuel tank 25 is opened to the relief valve 34 is increased beyond the specified value due to factors such as temperature rise, the pressure of the fuel tank 25 through the relief passage L ₇ The air is released to the air cleaner 27.

As described above, the switching cock 29 is automatically opened and closed by the sliding of the rear frame 2 accompanying the folding and assembly of the motorcycle V, so that not only the operation of the switching cock 29 can be omitted, but also the switching cock 29 The mistake of forgetting the operation is prevented.

To assemble the motorcycle V, a steering wheel
The upper half of the strike 14 is moved forward from the position of FIG. 2 to the position of FIG.
When swung, the boss 14 of the connecting arm 14 is₁Is CFC
Pin hole 15 of bracket 15 of frame 1₁Facing
To the position shown in FIG. At this time, the operation lever 41 is
Unless the lock pin 40 is operated, the boss 14₁Within
The connecting arm 14 and the bracket 15 are separated
And the handle lock pin 50 is
Engagement hole 51 of socket 51₁Steering handle 10
Is locked. As described above, the locking means L
Is in the inoperative position, as shown in FIG.
Key slot 49 of the switch 49 ₁Is the operation lever
41 is in a state where insertion of the key K is regulated.
Therefore, the locked state of the handle post 4 is easily checked.
be able to.

From this state, the operation lever 4 of the locking means L
1 is pivoted clockwise, the shaft 42 of the operation lever 41 is rotated.
By rotating the lock lever 43 integral with the lock lever 40, the lock pin 40 protrudes outward through the link 45, and the connecting arm 14 is connected to the bracket 15. As a result, the upper half of the handle post 14 is locked in the upright position of FIG. 1, a state to plug the key K therewith the operating lever 41 at the same time the position of Figure 9 the deviation from the key insertion hole 49 ₁ of the ignition switch 49 . And Thus, when starting the engine E by operating the ignition switch 49 by a key K, the handle lock is released also handle lock pin 50 disengaged from the engagement hole 51 ₁ of the bracket 51, the motorcycle V is runnable State.

Conversely, the motorcycle V is moved from the state of FIG.
The folded state, the lock pin 40 is swung to the operating lever 41 in the counterclockwise direction it is sufficient to retract the boss portion 14 _1. The swing of the operation lever 41 causes the key insertion port 49 ₁ of the ignition switch 49 to move.
Is again covered by the operation lever 41 and the start of the engine E is regulated.

[0024] Figure 11 shows a second embodiment of the present invention, this embodiment the engagement portion _35, 3 ₆ made of a pair of projections before and provided on the front frame 1 of the first embodiment described above Instead, the front frame 1 extends in the front-rear direction and
Is provided with an open groove 3a, and a front end of the inner surface of the groove 3a and
A pair of front and rear engaging portions 3a ₁ and 3a ₂ are formed by the rear end portion.
And characterized in that the.

According to this embodiment, when the rear frame 2 is in the retracted assembly position, the rear end of the groove 3a
Parts, with the lever 29 ₁ by the engagement portion 3a ₂ ie rear selector valve 29 is pushed forward is opened, when the rear frame 2 is in the folded position forward, the grooves 3a
Front end, i.e. the lever 29 ₁ by the engagement portion 3a ₁ of the front
Is pushed rearward to close the switching cock 29,
The same operation and effect as in the previous embodiment can be obtained.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various small design changes can be made without departing from the present invention described in the appended claims. It can be performed.

For example, in this embodiment, the opening and closing of the switching cock 29 of the fuel system is linked to the folding operation or the assembling operation of the motorcycle V. It is also possible to cause an operation to be performed.

[0028]

As described above, according to the present invention, a cock having a lever is provided on the rear frame, and a pair of front and rear parts opposed to each other with the lever interposed therebetween are provided on the front frame.
Are provided, and when the two frames are extended, the rear engagement member is provided.
Open the cock by pressing the lever with the joint, and
When the frame is contracted, the lever is pressed by the front engagement portion so as to close the cock, so that automatically according to the expansion and contraction of the two frames accompanying the folding operation or assembly operation of the foldable motorcycle. The opening and closing of the cock can be performed, so that not only can the labor of opening and closing the cock be saved, but also there is no risk of forgetting to open and close the switching cock due to a mistake. In particular, so as to face each other across the lever
The pair of front and rear engagement parts provided on the front frame
The bar can be opened and closed by directly pressing the bar.
Opening and closing of the frame always in conjunction with the expansion and contraction of the frame
And the structure of the interlocking mechanism is extremely simple and compact.
Cost reduction, assembly workability, maintainer
It is possible to contribute to the improvement of the workability of the sense.

[Brief description of the drawings]

FIG. 1 is an overall side view of a motorcycle according to a first embodiment of the present invention in an assembled state.

FIG. 2 is an overall side view of the motorcycle in a folded state.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is an enlarged view of a main part of FIG. 1;

FIG. 5 is a sectional view taken along line 5-5 of FIG. 4;

FIG. 6 is a schematic diagram of a fuel system during traveling.

FIG. 7 is a schematic diagram of a fuel system when the vehicle is not traveling.

8 shows the state when the lock means is not actuated; FIG.
8 line sectional view

FIG. 9 is a diagram showing a state when the lock unit is operated.

FIG. 10 is a sectional view taken along line 10-10 of FIG. 8;

FIG. 11 is a partial side view of a motorcycle according to a second embodiment of the present invention.

[Explanation of symbols]

1 ... front frame 2 ... rear frame 3 _5, 3a ₁ ... front engagement portion 3 _6, 3a ₂ of ... rear engagement portion 29 ... selector valve (cock) 29 ₁ - Lever Wf Front wheel Wr Rear wheel

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-249781 (JP, A) JP-A-3-21579 (JP, A) JP-A-58-126274 (JP, A) JP-A-4- 237690 (JP, A) Fully open 1987-156595 (JP, U) Fully open 1986-183789 (JP, U) Fully open 1-179090 (JP, U) Fully open 2-69591 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B62J 37/00 B62K 15/00

Claims (1)

(57) [Claims] 1. A front frame (1) supporting a front wheel (Wf) and a rear frame (2) supporting a rear wheel (Wr).
And a cock (29) having a lever (29 ₁ ) provided on a rear frame (2) and a front frame (1).
, A pair of front and rear opposed to each other across the lever (29 ₁ )
Are provided with engaging portions (3 ₅ , 3 ₆ ; 3a ₁ , 3a ₂ )
When the frames (1, 2) are extended, the rear engagement portion is provided.
(3 _6; 3a ₂₎ by pressing the lever (29 ₁₎ co
Open the hooks (29) and check the two frames (1, 2).
Front engaging portion at the time of contraction (3 _5; 3a ₁₎ by the lever
A cock opening / closing structure for a foldable motorcycle, wherein the cock (29) is closed by pressing (29 ₁ ) .