JPH0214991B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to safety measures at the time of a hard start in a hard start type motorcycle.

In motorcycles that transmit the power of the engine to the rear wheels via a continuously variable automatic transmission, for example, with a quick start type, if you start the motorcycle by increasing the throttle operation, the rotation speed will increase instantly after the engine starts. As a result, the vehicle body sometimes moved undesirably. To prevent this from happening, users are strongly advised to start the vehicle with the main stand up and the rear wheels lifted off the ground. However, despite such guidance, many users still start their vehicles with the main stand retracted, that is, with the rear wheels on the ground, and safety measures are required.

The present invention was developed based on the above circumstances, and its purpose is to prevent undesired movement of the vehicle body during startup by preventing a hard start when the main stand is retracted, while having a simple structure. The purpose of the present invention is to provide a highly safe, hard-starting motorcycle that can prevent such problems from occurring.

That is, the present invention forms an engaging portion on at least one of the main stand and the kick arm so that when the main stand is stored, even if the kick arm is depressed, the kick arm is caught on the main stand and prevented from rotating. It is.

An embodiment of the present invention will be described below based on the drawings.

This embodiment shows a scooter type motorcycle. In the figure, 1 is a pipe frame, which is composed of a down tube 2 and a main pipe 3.
A steering head pipe 4 is connected to the down tube 2, and a steering shaft 5 is pivotally supported on the steering head pipe 4. A front wheel 6 is attached to the lower end of the steering shaft 5.
is provided, and a handle 7 is attached to the upper end.

Reference numeral 8 denotes a swing type engine unit, which is constructed by integrally connecting an engine 9 and an automatic continuously variable transmission case 10. The engine unit 8 has its front end pivotally supported relative to the main pipe 3 so as to be able to swing freely. A rear wheel 11 is attached to the continuously variable transmission case 10, and the rear wheel 11 is driven by the power of the engine 9 via a continuously variable transmission (not shown). Note that the rear part of the engine unit 8 is suspended from the main pipe 3 by a suspension device (not shown).

A fuel tank 12 is disposed above the engine 9 and supported by the main pipe 3, and a seat 13 is provided above the fuel tank 12. A carrier 14 is attached to the rear of the seat 13.

15 is a step board, 16 is a leg shield, 17 is a fender that also serves as a front cover, 1
8 is a front cover of the engine, 19 is a left and right side cover, 20 is a top cover, and 21 is a handle cover. All of these 15 to 21 are made of synthetic resin.

A main stand 25 is attached to the front lower surface of the engine unit 8. As shown in FIG. 4, the main stand 25 has a pair of left and right legs 2.
6 and 26 are integrally connected by a bracket 27 and a plate 28, and the front end thereof is rotatably supported to the engine unit 8 by a support shaft 29. The pair of left and right legs 26, 26 have ground plates 30, 30, and a footrest protrusion 31 extending laterally is welded to the leg 26 located on the left side when facing forward. The footrest protrusion 31 faces the rotation trajectory plane of the kick arm, which will be described later.
This footrest protrusion 31 constitutes one of the engaging portions of the present invention. Main stand 25 has coil spring 3
2 and is biased to rotate. The coil spring 32 has one end connected to the main stand 25 and the other end hooked to the engine unit 8, and urges the main stand 25 to rotate toward one side and the other side, respectively, from the neutral position. In other words, when the main stand 25 is in the retracted state, the coil spring 32
5 in the retracting direction, and when the main stand 25 is in the upright position as shown in the imaginary line in FIG. 1, the coil spring 32 biases the main stand 25 to maintain the upright position. . Note that when the main stand 25 is erected, the rear wheels 11 are lifted off the ground.

40 is a kick arm for starting the engine,
It is designed to drive a crank arm (not shown). The kick arm 40 is provided on the left side of the engine 9 and extends rearward. A kick pedal 41 is provided at the rear end of the kick arm 40, and the kick pedal 41 is horizontally rotated and stored at a position along the side of the engine 9 when not in use. An engagement protrusion 42, which serves as the other engagement portion of the present invention, is integrally provided on the lower surface of the kick arm 40 and projects therefrom. This engaging protrusion 42 will be described later, but when the main stand 25 is retracted and the kick arm 40 is stepped down, the engaging protrusion 42 abuts and engages with the footrest protrusion 31 on the main stand 25 side. This prevents the rotation of the

The operation of the embodiment having such a configuration will be explained.

When setting up the main stand 25, the driver steps down on the footrest protrusion 31 and lifts the ground plate 3.
0,30 on the ground and lift the car body slightly and pull it backwards, the main stand 2
5 stands up as shown in the imaginary line in Figure 1 and supports the vehicle body.

When the engine is started by depressing the kick arm 40 when the main stand 25 is raised, the kick pedal 41 moves on the arc O shown in FIG. 1, and the footrest protrusion 31 of the main stand 25 does not exist within this movement range. The rotation angle required for starting can be obtained from Therefore, the engine can be started by depressing the kick arm 40. In this case, since the main stand 25 is erected, the rear wheels 11 are off the ground.
Therefore, if the throttle operation is excessive, the engine power will be transferred to the rear wheels immediately after the engine starts.
1, there is no risk of the vehicle body moving undesirably.

On the other hand, if an attempt is made to start the engine with the main stand 25 retracted, the result will be as shown in the imaginary line in Figure 2. In other words, the state in which the main stand 25 is retracted and the kick arm 40 is not pressed down is shown by the solid line in FIG.
Since the footrest protrusion 31 of No. 5 is located on the rotation trajectory plane of the kick arm 40, the lower surface of the kick arm 40 comes into contact with the footrest protrusion 31. When the kick arm 40 is further pushed down, the center of rotation of the kick arm 40 and the center of rotation of the main stand 25 are eccentric, so while both rotate, the footrest protrusion 31 is in relative sliding contact with the lower surface of the kick arm 40, and the rotation center of the kick arm 40 is eccentric. 40 is relatively displaced in the direction of the tip.
Engagement protrusion 42 protruding from the lower surface of the kick arm 40
When it hits the footrest protrusion 31 as shown by the imaginary line in Figure 2, no further relative sliding contact occurs, so
Further rotation of the kick arm 40 is prevented. More specifically, when the engagement projection 42 of the kick arm 40 hits the footrest projection 31, the rotation arc O of the kick arm 40 shown in FIG. 3 intersects the rotation arc O ₁ of the main stand 25, and the kick arm 40 Since it is no longer possible to rotate in the direction of the arrow beyond this intersection X, rotation is prevented. For this reason, the kick arm 40 cannot obtain the rotation angle necessary for starting the engine, and therefore cannot be started. That is, when the main stand 25 is retracted, the engine is automatically prevented from starting, thereby preventing the vehicle body from moving undesirably.

Moreover, in the case of the above embodiment, the footrest protrusion 31 is always provided for the operation of the main stand 25, whereas this can be realized by a simple structure in which the engagement protrusion 42 is simply provided on the kick arm 40. There are some advantages to doing so.

Note that the present invention does not include the footrest protrusion 3 as in the above embodiment.
1 and the engagement protrusion 42, the kick arm 4
The present invention is not limited to a structure that prevents the rotation of 0, but it is sufficient to provide an engaging portion that performs the same function as the above embodiment on at least either the main stand 25 or the kick arm 40.

Furthermore, the present invention is not limited to motorcycles equipped with the swing-type engine unit 8, but can be applied to motorcycles that have a main stand and are equipped with a hard-start engine.

As described in detail above, in the present invention, even if the kick arm is depressed when the main stand is retracted, the engine cannot be started because the rotation necessary for starting the kick arm is blocked by the engagement of the engaging portion. Therefore, since the engine cannot be started even if the rear wheels are on the ground while the main stand is retracted, undesired movement of the vehicle body does not occur, and safety is improved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is a side view of the motorcycle, Fig. 2 is a side view showing the relationship between the main stand and the kick arm, Fig. 3 is an explanatory diagram of its operation, and Fig. 4 is a side view of the motorcycle. FIG. DESCRIPTION OF SYMBOLS 1... Pipe frame, 8... Swing type engine unit, 11... Rear wheel, 25... Main stand, 31... Footrest projection (engaging part), 40...
...Kitsuku arm, 41...Kitsuku pedal, 42...
...Engaging protrusion (engaging part).

Claims (1)

[Claims] 1. When the kick arm is pressed down on at least one of the main stand and the kick arm when the main stand is in the retracted state,
A kick-start type motorcycle, characterized in that the kick arm is formed with an engaging portion that engages with a main stand to prevent rotation of the kick arm.