JPH0325092A - Gear shifter drive device of transmission for two wheel vehicle - Google Patents

Abstract

PURPOSE: To facilitate the multi-stage shifting by providing a recess to which one end of an engagement lever to be linked with a shift lever is fitted into an inclined groove on the whole circumferential surface of a shifter shaft to be connected to a shift handle corresponding to the number of shift stages. CONSTITUTION: A groove 21 inclined in the axial direction is provided in an annular manner in the whole cylindrical circumferential surface of a shifter shaft 2 to be connected to a shift handle, a recess 22 to which one end 3a of an engagement lever 3 is fitted is provided in the groove bottom corresponding to the number of shift, the other end 3b of the lever 3 is connected to a shift lever 4, and turnably and pivotably supported at a center part 3c. In addition, when ratchets 5, 6 to be urged in the fixed direction by torsion springs 8, 9 are attached to upper and lower ends of the shifter shaft 2, and rotated, the lever 3 is vertically moved through an annular groove 21 to transmit the shift action to the transmission side. At the same time, the returning force by the springs 8, 9 is applied to the ratchets 5, 6 to return the shifter shaft 2 to the original position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field] The present invention relates to a gear shifter drive device for a two-wheeled vehicle transmission, and more particularly to a gear shifter drive device for a two-wheeled vehicle transmission that uses a handle shift method.

[Conventional technology]

An example of a conventional gear shifter drive device for a two-wheeled transmission using a handle shift system is shown in FIG. In the figure, reference numeral 1 denotes a shift plate, which is linked to a shift handle (not shown), and is configured to reciprocate in the direction of the arrow in the figure by operating the shift handle. The outer peripheral edge of the shift plate 1 is provided with a plurality of depressions (5 in the example shown in Figure/B) 1-1 to 1-5 within an angular range of about 240 degrees, and an engagement plate for linking with the transmission side. A protrusion l2 provided on the lever 11 is fitted into the engagement/disengagement member 7E. Peek 1-1~! -of 5-
・One is the neutral position: aflll (marked as O on the shift plate in the figure), and the other is for shifting, and the device in this example is for shifting 1 reverse gear and 11 "forward 3 gears". There is.

That is, in this example, the shift plate 1 is moved by the shift handle.
by rotating the protrusion 12 and any predetermined depression 1-1 to 1.
-5 is fitted and the engagement lever 11 is driven to change the engagement state of the gears of the transmission to four stages.

[Invention or problem to be solved]

With the increase in wandering in recent years, in order to satisfy engine drive efficiency and sporty driving demands of drivers,
The number of multi-stage irregular transmissions with five or more stages is increasing, but the problem is that the gear shifter cantering device of the conventional two-wheel I1L 111 transmission described above is difficult to pass through to such multi-stage irregular transmissions. there were.

In other words, since the driver uses his/her wrist to simultaneously rotate the shift handle to change gears, the angle at which the shift plate 1 can be rotated is limited to about 240 degrees, and it is difficult to increase the angle beyond that. This is unreasonable from an ergonomic point of view; on the other hand, if the rotation angle remains the same and the number of recesses is increased, the spacing between the pours becomes too small, requiring a thousand operations that are too delicate, which is also ergonomic. This is because it would be unreasonable.

[Means for solving the three problems] The present invention was made in view of the above-mentioned conventional problems.
A gear shifter drive device for a dual-width medium transmission according to the present invention includes a shifter shaft connected to a shift handle and having a groove formed on the surface of a solid cylinder that is inclined with respect to the axial direction;
a ratchet attached to both the upper and lower ends of the shifter shaft;
an engagement lever that links the shifter shaft with a gearshift lever that connects the transmission side;
It consists of a torsion spring that biases the ratchet in a certain direction, and a sleeve cap that engages with the ratchet to correct the return of the ratchet due to the bias of the torsion spring, and A groove extends around the entire periphery of the cylindrical surface to form an annular shape, and a plurality of recesses corresponding to the number of gears are provided in which one end of the engagement lever is inserted into the full bottom, and the other end of the engagement lever is connected to the gear shifter. It is characterized by being attached to the lever and pivotally supported in the central part of the lever.

The gear shifter gear shifter of the motorcycle transmission according to the present invention can be applied not only to a handle shift type transmission for wheels, but also to a kick shift type two wheel transmission.

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

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a side view of the same in a button-up state, and Fig. 3 is the relationship between the shifter shaft and the engagement lever during A-E&:i shift operation. i
j~S side view. Figures 4 AI, A2, Bl, and B2 are a plan view and a side development view showing the relationship between the grooves of the shifter shaft and the gears, and Figure 5 is a conventional two-width-1 gear shifter drive device (showing the gear shifter drive device of a river transmission). FIG.

In the figure, 2 is a shifter shaft, 5 and 6 are ratchets, 3 is an engagement lever, 8 and 9 are torsion springs, and 7 is a sleeve cap.

The shifter shaft 2 has a cylindrical shape and is linked to a shift handle (not shown), and a groove 21 is formed on the cylindrical surface thereof at an angle with respect to the vertical direction. this? M2
1 is an annular member extending all around the cylindrical surface of the shifter shaft 2, and the -0. of the engagement lever is located at the bottom of the groove. 43a
A plurality of recesses 22, into which the gears are fitted, are provided in correspondence with the number of gears.

The arrangement state of the depressions 22 provided in this groove 21 is, for example,
1AA! , A2, Bl, and B2.

Figure 4 A1 and A2 have 12 indentations, and the symbols O (neutral), ! , 2, 3, 4, 5, 6
, 5, 4, 3, 2, 1. It has 12 shift variations, indicated by 4, 5, 4, 3, 2, 1, and is capable of six speeds. In addition, the 4th [71Bt, B2 has seven redundancies, and the symbols go (neutral), 1, 2
, 3, 4, 5, and 6, the seven shift variations H are rotated by 44 degrees, and 6 as shown in Figure 4 AI and A2.
It is designed to be able to change gears.

The engagement lever 3 links the shift lever 4 that connects the shifter shaft 2 and the transmission side.As mentioned above, one end 3a is fitted into the groove 21 of the shifter shaft 2, and the other end is inserted into the groove 21 of the shifter shaft 2. 3b is attached to the speed change lever 4, and the central portion 3C is rotatably supported by a shaft 31C.

The ratchets 5 and 6 are fitted to the lower end of the shifter shaft 2, and the torsion springs 8 and 9 are connected to the ratchets 5 and 6.
6 is installed so as to bias it in a certain direction. Therefore, when the shifter shaft 2 is rotated for a speed change operation, a pulling force is applied to the ratchets 5 and 6 by the torsion springs 8 and 9, and the shifter shaft 2 is urged to rotate so as to return to its original position.

On the other hand, claw bodies 5a provided on the outer peripheral edges of the ratchets 5 and 6. 6
a fits into a recess (not shown) provided in the inner surface fil1 of the sleeve caps 7, 7 (only the upper sleeve cap 7 is shown in the figure), and rotates the shifter shaft 2. Torsion springs 8 and 9 when
It is designed to prevent the same return rotation due to Note that the recesses provided in the grooves 13 of the sleeve caps 7, 7 are made to correspond to the positions of the recesses 22 provided in the groove 2l of the shifter shaft 2.

Next, the operation of this embodiment will be explained.

By operating the shift handle (not shown), the shifter shaft 2
When rotated, one end 3a of the engagement lever 3 is fully 2
1, the engagement lever 3 moves downward and transmits the gear change operation to the transmission side. Since the groove 21 is annularly provided around the entire circumference of the shifter shaft 2, the shift operation by the rotational movement of the shifter shaft 2 becomes a circular movement as shown in FIG. 3b only swings up and down.

In addition, after rotating the shifter shaft 2 and performing the first gear change operation, the shifter shaft 2 is
, 9, it is pulled back to the original position 1ζZ, and the gear shift can be performed again from the restored original position 7J.

(Effects of the Invention) Since the gear shifter drive device of the motorcycle 11 (Kawa Transmission) according to the present invention is as described above,
If adopted in a transmission using the handle shift method, it will be possible to perform irregular multi-speed transmissions of five or more gears even if the rotation angle of the driver's hand is small. (b) of the pedal operation when shifting gears.
This has the effect of reducing the number of

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is a side view of the assembled state, and Figs. 3 A-E are side views showing the relationship between the shifter shaft and the engagement lever during gear change operation. , Army 4 Figure AI, A2. Bl and B2 are a plan view and a developed side view showing the relationship between the groove of the shifter shaft and the gear stage, and the whistle 5 is a side view showing the gear shifter 55 of the transmission. 2: Shifter shaft 3: Engagement lever 3a: One end of the engagement lever 3b = other end of the engagement lever 3c: Center part of the engagement lever 4: Shift lever 5, 6: Ratchet 7: Sleeve cap 8, 9: Torsion spring 2 construction : Groove 22: Layout 3 Figure A1 A2 B1 B2

Claims (1)

[Scope of Claim] A gear shifter drive device for a transmission for a two-wheeled vehicle, comprising a shifter shaft connected to a shift handle and having a cylindrical surface with a groove inclined with respect to the axial direction, and a ratchet attached to both upper and lower ends of the shifter shaft. , an engagement lever that links the shift lever that connects the shifter shaft and the transmission side; a torsion spring that biases the ratchet in a certain direction; and a torsion spring that engages with the ratchet to attach the torsion spring to the ratchet. The groove of the shifter shaft extends over the entire circumference of the cylindrical surface to form an annular shape, and the bottom of the groove has a recess into which one end of the engagement lever is fitted, corresponding to the number of gears. A gear shift drive device connection for a transmission for a two-wheeled vehicle, characterized in that a plurality of the engagement levers are provided, the other end of the engagement lever is attached to the gear shift lever, and the other end of the engagement lever is rotatably supported in the center.