JPH0794867B2 - Vehicle speed change control device - Google Patents

Description

Description: [Object of the Invention] (Field of Industrial Application) [0001] The present invention relates to a shift control device for a vehicle that controls a gear shift mechanism including reverse by a rotary shift cam.

(Prior Art) In many transmissions for small vehicles such as saddle-ride type three- and four-wheeled vehicles, rotary shift cams are used. In the rotary type shift cam, a slide mechanism or a slide dog of the transmission gear mechanism is engaged with a cam mechanism formed on the outer periphery of the transmission gear mechanism through a shift fork, and the transmission gear mechanism includes reverse in accordance with a rotational displacement of a predetermined angle. The gear is shifted to a required speed stage, and its rotational displacement is normally driven in the reverse direction by a foot-type foot movement control lever.
In this case, the shift pattern is reverse, neutral, low, second, third, high ... (hereinafter R, N, L, 2nd, 3rd ...
They are arranged in the order of (H) and can be shifted up and down sequentially, but in the case of N → R, consideration is given to prevent inadvertent operation in terms of safety, gear squeal, and gear damage prevention. ing.

For example, there is one in which a mechanism for blocking the operation of N → R is added as it is, and the blocking mechanism is released by a manual operation of a lever or a knob. That is,
Take the N position with the foot movement control lever, pull the manual lever equipped on the handle etc. here,
It can be set to R by the foot movement control lever,
Unless this is done, the R operation cannot be performed, so that careless rearward movement of the vehicle is prevented. There is also a double safety type of manual operation in which a push button operation is added as a pre-operation. Further, there is a system in which the NR operation is disabled by the foot movement control lever, and the NR operation can be performed by a separately equipped manual control lever. In this case, in order to move the vehicle backward, one breath is placed at the N position and the continuity is interrupted in order to switch from foot movement to manual operation, so that safety can be guaranteed.

However, this type of vehicle, especially a saddle type vehicle adapted for running on rough terrain, often escapes by repeating small forwards and backwards when entering a swamp or shrubland. In this case, the gear shift of L → N → R → N → L is repeated, but any of the above-mentioned shift control means requires complicated complex repetitive operations of foot movement and manual operation.
There was a problem of lacking promptness.

(Problems to be Solved by the Invention) As described above, in the shift control device for a vehicle using the conventional rotary type shift cam, when the vehicle is moved backward, a separate operation is performed in addition to the normal operation or another operation is performed. Since it is possible to shift only by exchanging it to prevent accidental retreat, it is necessary to repeat two operations alternately when repeating forward and backward with a small swing for a short time. However, there is a problem in that the importance of sex is overemphasized and the ease and speed are impaired.

Therefore, the present invention solves this problem, and provides a shift control device for a vehicle, which enables simple and quick switching between forward and backward movements while ensuring safety to prevent accidental reverse. With the goal.

[Structure of Invention]

(Means for Solving the Problems) In order to achieve the above object, in the shift control device for a vehicle according to the present invention, the gear shift of the shift gear mechanism is converted via the shift fork by intermittently rotating within a predetermined angle range. In the transmission using the rotary type shift cam, the shift gear has a cam shape which is reverse, neutral, or
Low, second, third ... Set to a pattern that shifts up or down in the order of high, and as a drive mechanism that drives the intermittent rotation of this shift cam, a main drive mechanism that selects a position from neutral to high other than reverse , A reverse drive, a neutral drive, and a sub drive mechanism for selecting only the low position are installed side by side, the main drive mechanism is linked with the foot control lever, the sub drive mechanism is linked with the manual control lever, and the foot control is also controlled. The lever and the manual control lever can be operated only in the neutral position.

(Operation) With such a configuration, during normal traveling, the required speed stage is selected by operating the foot control lever and driving the shift cam by the main drive mechanism, but R cannot be selected and the vehicle moves backward. In this case, the R position is selected only by returning to the N position, switching to the operation of the manual control lever, and driving the shift cam by the sub drive mechanism. Therefore, the operator does not inadvertently move the vehicle backward by manipulating the foot control lever, and when the vehicle is moving backward, the manual control lever is operated with the intention of moving backward, so that safety is guaranteed. On the other hand, since the sub-drive mechanism can select the RNL, the forward and backward movement can be finely repeated by operating only the manual control lever, and the easiness and speed of the operation required for this type of operation are ensured. . At the same time, when switching from manual operation to foot movement, the operation is performed after returning to the N position, which involves switching the will to move forward, which further increases safety.

(Example) Hereinafter, it demonstrates in detail about the figure which shows the Example of this invention.

FIG. 1 is a side view of a straddle-type four-wheeled vehicle exemplifying a vehicle equipped with the device of the present invention, which is supported by a pair of steerable front wheels 1 and a pair of rear wheels 2 and is mounted in front by an engine 3 mounted thereon.
The rear wheels 1 and 2 are driven to drive. The rider operates the rod handle 5 while straddling the straddle-type seat 4 to control the output of the engine 3 and the transmission.

The transmission uses a rotary type shift cam, and is controlled by two systems of a foot movement control lever 6 and a manual control lever 7. Reference numeral 8 is a manual control intermediate lever provided in parallel with the foot movement control lever 6, and is connected to the manual control lever 7 by a cable 9.

2 and 3 show the shift cam of the transmission and its drive system, and FIG. 2 is a developed sectional view taken along the line BB in FIG.
FIG. 3 is a sectional view taken along the line AA in FIG.

The shift cam 10 has a plurality of cam grooves 11 on its outer periphery, and the pins 13 of the shift cam fork 12 are fitted in the shift cam 10, and the shift fork 12 engages with a slide gear or a slide dog of a transmission gear mechanism (not shown). When the shift cam 10 rotates by a predetermined angle, the slide gear and the slide dog are slid in the axial direction via the shift fork 12 to convert the transmission gear mechanism into a gear shift of a required speed stage. Has a pattern in which gear shift is performed in the order of RNL2nd3rdH by the forward or reverse rotation of the shift cam 10 within a predetermined angle range. In this case, the pitch from N to H is the same in each step, but the pitch between RN is set to 1/2 pitch. This is because the shift cam makes one revolution and the cutout portion of the cam groove 11 is arranged to prevent the gear shift to the HR. FIG. 3 shows a state in which the shift cam 10 is in the N position.

A main drive mechanism and a sub-drive mechanism are provided side by side as a drive mechanism for rotating the shift cam 10 by a pitch.

The main drive mechanism is configured as follows. First,
Shift pin 14 corresponding to each speed stage on the end face of shift cam 10
N, 14L, 14-2nd, 14-3rd, 14H are projected. In this case, the shift pin corresponding to R is excluded and arranged. The neighbor 2
The feed claw pole 15 is elastically contacted to the outside of the shift pin of the book.

The feed pawl pole 15 has feed pawls 17a and 17b facing the front and rear direction of the two shift pins, and is pivotally supported by the tip of the pivot lever 16 to pivot forward or rearward from the neutral position (the position shown in FIG. 3). And then return to the neutral position again.
Turn 10 by 1 pitch in the forward or reverse direction. The arrow indicates the direction of upshift. The swing lever 16 is rotatably supported by a support shaft 8a of the manual control intermediate lever 8 and is connected to a link arm 18 arranged oppositely through a pin 19 and a long hole 20 to swing the link arm 18. Shake according to the movement.

The link arm 18 is fixedly provided on the support shaft 6a of the foot movement control lever 6. Then, the base portion of the clip-shaped spring 22 is supported by the shaft hole boss 21 of the support shaft 6a, and the projecting piece 24 formed on the link arm 18 is sandwiched together with the reference pin 23 fixed to the case. As a result, the foot movement control lever 6, the link arm 18, the swing lever 16 and the feed pawl pole 15 are always urged so as to keep the neutral position.

The shift cam 10 is normally or reversely rotated by every pitch by forward or reverse operation strokes in which the foot motion control lever 6 is stepped down or flipped up at the toe portion to return to the neutral position, and the transmission gear mechanism is shifted up or down by one step. Downshift. However, as described above, since there is no shift pin corresponding to R, the operation of the foot movement control lever 6 becomes invalid and the shift cam 10 cannot be sent to the R position.
Reference numeral 25 denotes a petal-shaped cam stopper formed on the shift cam 10, and the pressure roller 26 elastically contacts the shift cam 10 to accurately regulate the pitch rotation of the shift cam 10.

Next, the sub drive mechanism is configured as follows.

A fan-shaped swing arm 27 fixed to the support shaft 8a of the manual control intermediate lever 8 is placed behind the link arm 18 so as to overlap therewith. Two drive pins 28a, 28b are provided on the outer peripheral portion of the fan-shaped swing arm 27 so as to form a kind of pin gear corresponding to the driven grooves 29a, 29b formed on the outer periphery of the end surface of the shift cam 10. The shift cam 10 is normally and reversely rotated by the swing motion of the swing arm 27. As shown in FIG. 3, when the shift cam 10 is in the N position, the swing arm 27 is in the intermediate position, and the drive pins 28a, 28b are driven grooves 29a, 29b.
Is out of.

Drive pin 28 is moved by swinging swing arm 27 in the direction of the arrow.
a engages the driven groove 29a to rotate the shift cam 10 one pitch to send it to the L position (Fig. 5), and when it swings in the opposite direction, the drive pin 28b engages the driven groove 29b and shift cam Turn 10 a half pitch and send it to the R position (Fig. 4). When sending to the R position, since the shift pin is absent and the feed pawl pole 15 is not lifted as described above, the shift pin 14N may hit the feed pawl 17a and the operation may be blocked. For this reason, the retainer 31 is rotated by another pin 30 projecting from the swing arm 27, and the projection 32 formed on the retainer 31 lifts the feed pawl pole 15 to avoid contact with the shift pin 14N.

The swing angle of the swing arm 27 must be properly regulated and limited by a stopper. In the L position, the front edge 27a of the swing arm 27 contacts the stopper 33 installed on the case, as shown in FIG. When taking the R position, the stopper pin 34 protruding from the link arm 81 is applied to the bottom edge of the U-shaped stopper groove 35 formed at the tail end of the swing arm 27 to stop the swing. The position where the stopper pin 34 and the stopper groove 35 engage with each other is the stopper pin 34 and the support shafts 6a, 8a.
The lines connecting the and are set at positions orthogonal to each other to stabilize the stopper function. In addition, the swing arm 27
As shown in FIG. 7, the R, N, L positions of the arm itself are held by the pin 36 protruding from the rear surface and the clip 37 mounted on the case.

On the other hand, as shown in FIG.
When held in the position, the stopper pin 34 contacts both side edges of the U-shaped stopper groove 35, and the link arm 18 is prevented from swinging back and forth. When the swing arm 27 is in the L position, the stopper pin 34 contacts the stopper edge 38 on the swing arm 27, and at the same time, the stopper pin 39 protruding on the swing arm 27 and the stopper edge extending on the link arm 18 are provided. 40
Are touched by each other, and swinging forward and reverse is prevented. This stopper pin 34
Also, the postures of the stopper edge 38, the stopper pin 39, and the stopper edge 40 at the time of engagement are such that the applied force is directed toward the center of the support shaft 8a to stabilize the stopper function.

Thus, the main drive mechanism by swinging the link arm 18 can operate only when the swing arm 27 is in the N position (FIG. 3). On the contrary, when the shift cam 10 is rotated to LH by the action of the main drive mechanism in this way, since the drive pins 28a and 28b of the swing arm 27 in the N position are in contact with the outer periphery 41 of the shift cam 10,
Can't swing. That is, the sub drive mechanism can also operate only when the shift cam 10 is in the N position. Therefore, the operations of the main drive mechanism and the sub drive mechanism can be exchanged only at the N position of the shift cam 10.

As described above, the main drive mechanism is controlled by the foot movement control lever 6, and the sub drive mechanism is controlled by the manual control lever 7 via the manual control intermediate lever 8 and the cable 9. Foot control lever 6 is NL2nd3rd ...
Select up to H and set the manual control lever 7 to RN
Select L. It is controlled only by the manual control lever 7 of the vehicle, and the continuity from the foot movement is cut off to ensure safety. On the other hand, the manual control lever 7
It is possible to control the repetition of forward movement and backward movement only by adding the ease and speed.

FIG. 8 shows an enlarged side view of the manual control lever 7, which is installed between the seat 4 and the rod handle 5 on the upper part of the vehicle body or the like so that the rider can easily operate it. It can swing back and forth around the support shaft 7a and moves along a guide plate 43 fixed to the vehicle body side. The support cylinder 44 is provided on the upper part of the lever, and the grip 45 is inserted with the spring 46 always urged upward, and the guide pin 47 projecting from the lower end is projected from the long hole 48 of the support cylinder 44 to form the guide plate. It makes elastic contact with the upper edge of the guide hole 49 provided in 43. The guide hole 49 is used to position the R, N, L positions, and at the N position, the stepped portion 50 temporarily blocks swinging to the R side. Therefore, N → R can be operated only after the grip 45 is pressed down to get over the step 50, and is added as one means for preventing an inadvertent operation to R. The arrow indicates the traveling direction of the vehicle.

〔The invention's effect〕

As described above, the vehicle shift control device according to the present invention uses the rotary type shift cam,
Select the gear shift from N to H with the foot control lever, and RN with the manual control lever.
The gear shift of L is selected, and the conversion of the operation is made possible only by the N position. When the vehicle retreats, the continuity of the operation is cut off to ensure safety, and only the manual control lever is used. It is possible to repeat fine forward and backward movements, add easiness of operation and quickness, and have the effect of greatly improving the control function of a saddle-ride type four-wheeled vehicle or the like.

[Brief description of drawings]

FIG. 1 is a side view of a saddle-ride type four-wheeled vehicle showing an embodiment of the present invention, FIG. 2 is a developed sectional view of the shift cam drive system taken along the line BB in FIG. 3, and FIG. 4 to 6 are side views showing the working state of the shift cam drive system, and FIG. 4 shows a side view of the shift cam drive system when the shift cam is moved to the reverse position by the sub-drive mechanism. FIG. 6 shows a low position by the sub drive mechanism, FIG. 6 shows a second position by the main drive mechanism, and FIG. 7 shows an enlarged side view of a positioning clip of the swing arm.
The figure is an enlarged side view of the manual control lever. 6 ... foot control lever, 6a ... spindle, 7 ... manual control lever, 7a ... spindle, 8 ... manual control intermediate lever, 8a ... spindle, 9 ... cable, 10 ...
… Shift cam, 14N, 14L, 14−2nd, 14−3rd, 14H …… Shift pin, 15 …… Feed pawl, 16 …… Rotating lever, 17a,
17b …… Feed claw, 18 …… Link arm, 25 …… Cam stopper, 26 …… Pressure roller, 27 …… Swing arm, 28
a, 28b …… Drive pin, 29a, 29b …… Driven groove, 33…
… Stopper, 34,39 …… Stopper pin, 35 …… Stopper groove, 38,40 …… Stopper edge.

Claims (1)

[Claims] 1. A transmission using a rotary shift cam for converting a gear shift of a transmission gear mechanism through a shift fork by intermittently rotating a predetermined angle range, wherein a cam shape of the shift cam is changed to a normal or reverse rotation. The transmission gear device is set to a pattern of upshifting or downshifting in the order of reverse, neutral, low, second, third ... high, and as a drive mechanism for driving the intermittent rotation of the shift cam, the drive mechanism from neutral other than reverse is set to high. The main drive mechanism for selecting the positions up to and the sub-drive mechanism for selecting the reverse, neutral, and low positions are installed side by side, and the foot drive control lever is linked to the main drive mechanism, and the sub-drive mechanism is manually operated. While linking the control lever Speed control apparatus for a vehicle, characterized in that the operation of Ashido control lever and the manual control lever and to exchange only in the neutral position.