JPS636255A - Speed change control device for car - Google Patents

Abstract

PURPOSE:To provide safe and easy changeover between forward and backward motions by selecting gear shifts from N-H using a foot lever through a main drive mechanism, and selecting gear shifts from R-L with a hand lever through a sub-drive mechanism. CONSTITUTION:The shapes of cam grooves 11 furnished at the periphery of a shift cam 10 of rotary type, used to the speed change device of this car concerned, for ex. a four-wheel car of saddle ride type, are set in a pattern so that gear shift is performed in the sequence as R, N, L, 2nd, 3rd, and H by means of regular or reverse rotation of the shift cam 10 in a certain angle range. A main drive mechanism equipped with a plurality of shift pins 14 and a feed pawl 15 on a swing arm 27 is controlled with a foot lever 6. Meantime a sub-drive mechanism equipped with a gear mechanism consisting of a drive pin 28 on the sector-shaped swing arm 27 and a driven groove 29 on said shift cam 10 is controlled with a hand lever 7. Thereby gear shifts are selected in respective specific ranges.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a gear shift control device for a vehicle that controls a gear shift mechanism including a reverse gear shift mechanism using a rotary shift cam.

(Prior art) Transmission systems for small vehicles such as straddle-type three- and four-wheel vehicles are equipped with 0-
Many use a tally-type shift cam. In a rotary type shift cam, a slide gear or a slide dog of a transmission gear mechanism engages with a cam groove formed on its outer periphery via a shift fork, and the transmission gear mechanism shifts, including reverse, depending on the rotational displacement of a predetermined angle. Shift 1 to desired speed step
The rotational displacement is generally driven in forward and reverse directions by a foot-operated foot control lever. In this case, the shift pattern is reverse, neutral,
Low, second, third, high... (hereinafter referred to as R, N, 1)
．． (abbreviated as 2nd, 3rd, H),
It is possible to shift up and down in sequence, but N
-R is designed to prevent accidental operation for safety reasons and to prevent gear squeal and gear damage.

For example, some devices are equipped with a mechanism that blocks the operation of N-+R as is, and the blocking mechanism is released by operating a manual lever, knob, or the like. In other words, take the N position with the foot control lever,
At this point, the vehicle can be set to R by pulling a manual lever mounted on the steering wheel or the like, and then using the foot control lever.Unless this is done, the vehicle cannot be operated to R, which prevents the vehicle from moving backwards inadvertently. The manual operation described above also includes a double safety type in which a push button operation is added as a preliminary operation. Additionally, some foot control levers disable NOR operation, and a separately equipped manual control lever allows NoR operation. In this case, in order to move the vehicle backwards, the system is based on the idea that safety can be guaranteed by using a single-call device in the N position and switching from foot movement to manual operation, thereby maintaining continuity.

However, when this type of vehicle, especially a straddle-type vehicle adapted for driving on rough terrain, enters a wet field or a field of shrubs, it is often necessary to repeatedly make small forward and backward movements in order to escape. , in this case li of gear shift from L-+N to R-1N-IL! In return, all of the above-mentioned speed change control means require complex repetitive foot and manual operations, and have the problem of lack of ease and speed.

(Problems to be Solved by the Invention) As described above, in the conventional vehicle speed change control device using a rotary shift cam, when reversing the vehicle, a separate operation is added in addition to the normal operation, or another operation is required. This makes it possible to shift only by changing the sling to prevent accidental reversing. Therefore, when moving forward and backward in a short period of time with a small sling, it is necessary to repeat the two operations alternately, and it is safe to do so. There was a problem in that too much emphasis was placed on ease of use and speed.

SUMMARY OF THE INVENTION Therefore, the present invention aims to solve this problem, and provides a gear shift control device for a vehicle that allows switching between forward and forward travel to be performed simply and quickly while ensuring safety to prevent accidental backward movement. With the goal.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, in the vehicle speed change control i-roll device of the present invention, the speed change gear mechanism is connected to the speed change gear mechanism via the shift fork by intermittent rotation within a predetermined angular range. In a transmission device using a rotary shift cam, the cam shape of the shift cam can be rotated in the forward or reverse direction to change the gear shift from reverse to neutral to low to second to third to high. A main drive mechanism configured with shift pins arranged at pitches on the shift cam and a feed pawl ball on the swing arm as a drive mechanism that drives the intermittent rotation of the shift cam, which is set in a pattern of shifting up or down in sequence;
Equipped with two systems: a sub-drive mechanism with a gear mechanism installed on the shift cam and on the II #J fan-shaped arm,
The main drive mechanism selects a position from neutral to high other than reverse that is blocked by the absence of the shift bin or the arrangement of the stopper, and the nub drive mechanism selects a position from neutral to high by positioning the teeth within a predetermined angular range. , only the low position is selected, a foot control lever is linked to the main drive mechanism, and a manual control lever is linked to the sub-drive m41.

(Function) With this configuration, during normal driving, the required speed step is selected by operating the foot control lever and driving the shift cam by the main drive mechanism, but it is impossible to select R. When reversing, the R position is selected only by switching to manual control lever operation and driving the shift cam by the sub-drive mechanism. Therefore, the driver does not carelessly move the vehicle backward by operating the foot control lever, and when reversing, the manual control lever is operated with the intention of reversing, so safety is guaranteed. -On the other hand, the sub-drive mechanism is
Since it is possible to select ReN + ÷ L, fine repetition of forward and backward movement is possible by operating only the manual control lever.
The ease and speed of operation necessary for this type of operation is ensured.

(Example) Hereinafter, the drawings showing the example of the present invention will be described in detail.

FIG. 1 is a side view of a straddle-type four-wheeled vehicle, which is an example of a vehicle equipped with the device of the present invention.
The vehicle runs by driving the rear wheels 1 and 2. The rider straddles the straddle-type seat 4 and operates the handlebar 5 to control the output of the engine 3 and the transmission.

The transmission has a built-in rotary shift cam, and is controlled and rolled by two systems: a foot control lever 6 and a manual control lever 7. Reference numeral 8 denotes a manual control intermediate lever arranged in parallel with the foot control lever 6 and connected to the manual control lever 7 by a cable 9.

Figures 2 and 3 show the shift cam of the transmission and its drive system, Figure 2 is a cross-sectional view from Figure 3 B-8,
FIG. 3 is a sectional view taken along the line A-△ in FIG.

The shift cam 10 has a plurality of cam grooves 11 on its outer periphery, into which pins 13 of a shift fork 12 fit, and the shift fork 12 engages with a slide gear or a slide dog of a transmission gear mechanism (not shown). shift cam 10
When the cam groove 11 rotates at a predetermined angle, the slide gear and the slide dog slide in the axial direction via the shift fork 12, converting the transmission gear mechanism into a gear shift at the required speed stage.The shape of this cam groove 11 is , by forward or reverse rotation of the shift cam 10 within a predetermined angle range, R←N(→L”
It has a pattern of gear shifting in the order of 2nd 03rd 0H. In this case, the pitch is the same for each stage from N to H, but the pitch between RHN is set to 1/2 pitch. This is to arrange a blocking portion of the cam groove 11 that prevents the shift cam from rotating once and shifting to H++R. FIG. 3 shows the state when the shift cam 10 is in the N position.

Drive to rotate the shift cam 10! 11J is equipped with a main drive mechanism and a sub-drive mechanism.

The main drive mechanism is constructed as follows.

First, shift bins 14N, 14L, 14-2nd, 14-3rd, and
Install 14H protrudingly. In this case, the shift bin corresponding to R is excluded from the arrangement. A feed pawl ball 15 is brought into elastic contact with the outside of the two adjacent shift bins.

The feed pawl ball 15 has feed pawls 17a and 17b facing the front and rear of the two-wood shift bin, and is pivoted to the tip of the swing lever 16 to move 1f forward or backward from the neutral position (the position shown in FIG. 3). The shift cam 10 is rotated one pitch at a time in the forward or reverse direction. The arrow indicates the direction of upshift. Above swing lever 1
6 is rotatably supported on the support shaft 8a of the manual control intermediate lever 8, and is connected to the opposing link arm 18 via a pin 19 and an elongated hole 20. Shake.

This link arm 18 is connected to the foot control lever 6.
It is fixedly provided on the support shaft 6a of the. And support 4tk
The base of a clip-shaped spring 22 is supported in the shaft hole boss 21 of 6a, and the protrusion 24 formed on the link arm 18 is held together with the reference pin 23 fixed to the case. As a result, the foot movement control lever 6, the link arm 18.1m movement lever 16, and the feed pawl ball 15 are urged to maintain the neutral position at all times.

Then, by depressing the foot control lever 6 or flipping it up at the toe portion and operating the lever in the forward and reverse directions without returning to the neutral position, the shift cam 10 rotates in the forward and reverse directions one pitch at a time, shifting the transmission gear v1 one step at a time. Shift up or down. However, as described above, since there is no shift bin corresponding to R, the operation of the foot control lever 6 is disabled and the shift cam 10 cannot be sent to the R position.

Reference numeral 25 is a petal-shaped cam stopper formed on the shift cam 10, with which the pressure roller 26 comes into elastic contact, and accurately regulates the pitch rotation of the shift cam 10.

Next, the sub-drive mechanism is configured as follows.

A fan-shaped swinging 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. Two drive bins 28a and 28b are protruded from the outer periphery of the swing arm 27, and the shift cam 10
A type of pin gear is formed in correspondence with the driven grooves 29a and 29b formed on the outer periphery of the end face. The shift cam 10 is rotated forward and backward 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 bins 28a and 28b are in the driven groove 29a.

It is off from 29b.

J:8 When the fIJ arm 27 swings in the direction of the arrow, the drive bin 28a engages with the driven groove 29a, rotates the shift cam 10 one pitch and sends it to the L position (Fig. 5), and swings in the opposite direction. When turned, drive bin 28b
engages with the driven groove 29b to rotate the shift cam 10 by half a pitch and send it to the R position (FIG. 4). When feeding to the R position, the shift bin 14N is missing and does not lift the feed pawl ball 15 as described above, so there is a risk that the shift bin 14N will hit the feed pawl 17a and the action will be blocked. For this reason, another one protruding from the swinging arm 27 is
Rotate the retainer 31 with the book bottle 30, and
The protrusion 32 formed in the above lifts the feed pawl ball 15 to avoid contact with the shift bin 14N.

The swing angle of the swing arm 27 needs to be properly regulated and limited by a stopper. When the L position is taken, as shown in FIG.
comes into contact with a stopper 33 installed in the case. When taking the R position, a stopper pin 34 protruding from the link arm 18 is placed against the bottom edge of a 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 is set at a position where the lines connecting the stopper pin 34 and the support shafts 5a, 8a are perpendicular to each other, so that the stopper is held stably.

Further, as shown in FIG. 7, the swinging arm 27 is held in its R, N, and L positions by a pin 36 protruding from the back and a clip 37 attached to the case.

On the other hand, as shown in FIG. 4, when the swing arm 27 is held in the R position, the stopper bin 34 contacts both edges of the U-shaped stopper groove 35, and the link arm 18 swings back and forth. be prevented. Swing arm 2
7 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 from the swing arm 27 and the link arm 18
A stopper edge 40 extending thereto contacts the front and back to prevent swinging in the forward and reverse directions. The postures when the stopper pin 34 and the stopper edge 38 and the stopper pin 39 and the stopper edge 40 are engaged are also as follows:
The stopper function is stabilized by directing the applied force toward the center of the support shaft 8a.

In this way, the main drive mechanism by the swinging of the link arm 18, the swinging arm 27 is in the N position (FIG. 3).
It is only possible to operate when

Conversely, when the shift cam 10 is rotating from L to H due to the action of the main drive mechanism, the swing arm 27 in the N position has the drive bins 28a and 28b in contact with the outer periphery 41 of the shift cam 10. Can't swing. That is, the sub-drive mechanism is also operable only when the shift cam 10 is in the N position. Therefore, the operation of the main drive mechanism and sub-drive mechanism is controlled by the shift cam 10.
It can be replaced only in the N position.

As mentioned above, the main drive mechanism is controlled by the foot 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 N 0L M 2
nd o3 r d -H is selected, and the manual control lever 7 selects R++N HL. The backward movement of the vehicle is controlled only by the manual control lever 7, and the continuity from the foot movement is cut off, ensuring safety.On the other hand, the repetition of forward and backward movement can be controlled only by the manual control lever 7, making it easy to move. Adds speed.

FIG. 8 shows an enlarged side view of the manual control lever 7, which is installed on the upper part of the vehicle body between the seat 4 and the bar handle 5 for easy operation by the rider. It can move back and forth J1 around the support shaft 7a, and moves along a guide plate 43 fixed to the vehicle body side. A support tube 44 is provided at the top of the lever, and a grip 4 is provided.
5 is inserted while being always urged upward by a spring 46, and the guide pin 47 protruding from the lower end is made to protrude from the elongated hole 48 of the support fR44, and the guide pin 47 is inserted into the upper edge of the guide hole 49 provided in the guide plate 43. make bullet contact. This guide hole 49 allows R
, N, and L positions, and at the N position, the step portion 5o temporarily prevents swinging toward the R side. Therefore, N→R becomes operable only after the grip 45 is pushed down and the step 50 is climbed over, and this was added as a means to prevent careless operation to R. The arrow indicates the direction of travel of the vehicle.

9 and 10 show an embodiment of the present invention, FIG. 9 is a sectional view taken along the line C--C in FIG. 9, and FIG. 10 is a side view taken along the line C--C in FIG. 9.

A main drive mechanism and a manual control lever that intermittently rotate the shift cam 10 via the swing arm 16, feed pawl ball 15, and shift bins 14N...14H by means of a link lever 51 connected to the foot control lever 6. Drive bin 53 of the swinging arm 52 interlocked with 7
The mechanism for rotating the shift cam 10 in the forward and reverse directions using the driven wheels 54a and 54b is basically the same as that of the first embodiment. The structures and functions of the clip-shaped spring 22, cam stopper 25, pressure roller 26, bottle 36, clip 37, etc. are also similar.

A bin 55 corresponding to the shift bin in the R position is provided on the end surface of the shift cam 10, but this bin 55 corresponds to the shift bin in the R position.
This is not to send the shift cam 10 to the R position, but to lift the feed pawl ball 15 so as not to interfere with the operation of the N-JR by the sub-drive mechanism.Therefore, the retainer shown in the previous embodiment is omitted.

FIG. 10 is a diagram showing the shift cam 10 in the N position, and shows the stopper pin 56 protruding from the swing arm 52.
is fitted into a stopper hole 57 formed in the link arm 51, and the link arm 51 is prevented from moving from N to R in this case by the contact between the stopper edge 57a and the stopper pin 5G. In this state, the swing arm 52 is
This continues when the position is taken (FIG. 11), and the movement of the link arm 51 from R to N in this case is also blocked when moving from the opposite side to the seat 1 to the brim green 57b.

The stopper edge 57c positions the swing arm 52.

When the swing arm 52 is in the L position (FIG. 12), the stopper pin 56 and the stopper edge 57d cause the 1! The moving arm 52 is positioned. - On the other hand, the link arm 51 is released from the stopper action and can freely perform the first shift, allowing the shift cam 10 to be sent from L-N to the L→2nd position. When L-)N, l! is transmitted from the shift cam 10 through the driven groove 548 and the drive pin 53a. i! F
The JJ arm 52 is reversely driven to return to the N position shown in FIG.

Further, FIG. 6 shows the state before the link arm 51 performs N-+L movement and returns to the neutral position, but the stroke is caused by the stopper pin 56.
and a stopper>157e, and a cam pin 58 protruding from the link arm 51 and a swing arm 52
A cam face 59 formed in the cam face 59 causes the swing arm 52 to swing into the position. From this state, link arm 5
1 returns to the neutral position, it will be in exactly the same state as in FIG. 4, where it is set to N-1 by the swing arm 52.

A transition from the position L+2ndH3rd+H is possible only by the link arm 51.

FIG. 14 shows the state of the 2nd position. The swing arm 52 is held in its position by the stopper action of the stopper bin 56 and the stopper edge 57d, and by the brim action of the drive pin 53a abutting against the outer periphery 60 of the shift cam 10.

With the above configuration, in the second embodiment, the foot fIJ control lever 6 controls each stage from N to 1'', the manual control lever 7 controls the position of R4-+NHL, and both control levers 6
．． The operation of 7 can be converted between the N and L positions, and the manual control lever 7 changes the lever position to the NHL position in conjunction with the N - = L operation of the foot control lever 6, making it easier to operate and faster. Increase.

Note that the sub-drive mechanism may be a gear mechanism such as a normal spur gear instead of the pin gear shown in the above embodiment.

(Effects of the Invention) As described above, the vehicle gear shift control device according to the present invention uses a rotary type shift 1-cam, and selects gear shifts from N to 11 with a foot control lever, and manually controls the shift control device. R by lever
←N (→L) gear shift is selected, so
When reversing the vehicle, continuity of operation is interrupted to ensure safety, and the vehicle can be moved repeatedly forward and backward using only the hand control lever, making operation easier and faster. This has the effect of greatly improving the control functions of straddle-type four-wheeled vehicles.

[Brief explanation of the drawing]

FIG. 1 is a side view of a straddle-type four-wheeled vehicle showing an embodiment of the present invention, FIG. 2 is a sectional view of the shift cam drive system taken along arrow B-8 in FIG. Figure A-A arrow? fJ side view, 4th
Figures 6 to 6 are side views showing the operating state of the shift cam drive system. Figure 4 shows when the shift cam is moved to the reverse position by the sub-drive mechanism, Figure 5 shows the 0-up position by the sub-drive mechanism, and Figure 6 shows the operating state of the shift cam drive system. 7 shows the second position by the main drive mechanism, and FIG. 7 is an enlarged side view of the positioning clip of the swing arm.
Figure 8 is an enlarged side view of the manual control lever, Figure 9
Figure 9 C-C shows another embodiment of the shift cam drive system.
10 is a side view taken along the line C-C in FIG. 9, FIGS. 11 to 14 are side views showing the operating state of the shift cam drive system, and FIG. The reverse position by the mechanism, Fig. 12 shows the low position by the sub-drive gate structure, and Fig. 13 shows the main drive mechanism sending the shift cam to the low position and just before returning to the first position.
FIG. 4 is a diagram showing the second position by the main drive mechanism. 6... Foot control lever 6a... Support fdl 7... Manual control lever 7a... Support shaft 8... Manual control intermediate lever 8 a... Support shaft 9... Cable 10...・Shift cam 14N, 141° 14-2nd, 14-3r
d, 14 Todo...Shift bin 15...Feed claw ball 1
6... Swing lever 17a, 17b... Feed claw
18.51... Link arm 25... Cam stopper 26... Pressure roller 27.52... Swinging arm 28 a, 28b, 53a, 53b-... Drive bin 2
9a, 29b, 54 a, 54b... driven groove. $ l Figure Sheep 2 Figure 2'? J condolence a flash $ 7 Figure 9

Claims (1)

[Claims] 1. In a transmission using a rotary shift cam that changes the gear shift of a transmission gear mechanism via a shift fork by intermittently rotating within a predetermined angle range, the cam shape of the shift cam is A drive that drives the intermittent rotation of this shift cam by setting a pattern in which the transmission gear device shifts up or down in the order of reverse, neutral, low, second, third...high by forward or reverse rotation. There are two mechanisms: a main drive mechanism consisting of shift pins arranged at pitch on the shift cam and feed pawl balls on the swinging arm, and a sub-drive mechanism consisting of gear mechanisms arranged oppositely on the shift cam and the swinging fan-shaped arm. The main drive mechanism selects a position from neutral to high other than reverse which is prevented by the omission of the shift pin or the arrangement of the stopper, and the sub-drive mechanism selects a position from neutral to high within a predetermined angle range. A vehicle characterized in that only reverse, neutral, and low positions can be selected by tooth arrangement, a foot control lever is linked to the main drive mechanism, and a manual control lever is linked to the sub-drive mechanism. Gear shift control device. 2. The main drive mechanism is made unable to drive the shift cam to the reverse position due to the lack of a shift pin, and when the sub-drive mechanism assumes a reverse or low position other than neutral, a stopper is engaged in that position. When the sub-drive mechanism is in its own neutral position and the shift cam is rotating from the low to high position, the sub-drive mechanism is inhibited from operating by a limited gear mechanism between it and the shift cam. 2. The vehicle speed change control device according to claim 1, wherein the foot control lever and the manual control lever can be exchanged only in a neutral position. 3. When the sub-drive mechanism is in the neutral or reverse position, the main drive mechanism engages a part of it to prohibit downshifting and upshifting, and is reversely driven from the main drive mechanism to operate together with the manual control lever. 2. The vehicle speed change control device according to claim 1, which changes the position from neutral to low and from low to neutral.