JPS636254A - Speed change control device for car - Google Patents

Abstract

PURPOSE:To simplify the constitution and provide smooth operations by forming the principal parts of a main and a sub drive mechanism for driving a shift cam in the form of plate, supporting these parts concentrically, and arranging the two drive mechanisms on both sides of the shift cam viewed in the diametric direction. CONSTITUTION:A shift cam 10 is driven by a foot lever 6 in the range from N-L, 2nd, 3rd, and H through a main drive mechanism, while the same cam is driven by a hand lever 7 in the range from R-N, L through a sub-drive mechanism. Here a swing arm 16 and a link arm 18 constituting the principal parts of said main drive mechanism through pivoting of a feed pawl 15 in resilient contact with a plurality of shift pins 14 are formed in the form of plate and supported on shafts 8a, 6a for an intermediate lever 8 and the hand lever 6. A sector-shaped swing arm 27 constituting the principal parts of said sub-drive mechanism is formed also in the form of plate and supported on the said shaft 8a. The two drive mechanisms are arranged on both sides of the shift cam 10 viewed in the diametric direction.

Description

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

(Prior Art) Rotary shift cams are often used in transmission devices for small vehicles such as straddle-type three- and four-wheel vehicles. 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. It is designed to shift to the required speed stage, and its 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 R, N, L,
(abbreviated as 2nd, 3rd-H), and it is possible to shift up and down in sequence, but N→
In the case of R, care has been taken to prevent accidental operation for safety reasons and to prevent gear squeal and gear damage.

For example, a mechanism is added to prevent the N→R movement, and this blocking mechanism is released by operating a manual lever or knob, or some foot control levers prevent the N4-+R movement. There are some models that allow the NHR to be operated using a separately equipped manual control lever. However, with this type of vehicle, especially a saddle type vehicle adapted for driving on rough terrain, when entering a wet muddy field or a field of shrubs, the vehicle often attempts to escape by repeatedly moving forward and backward in small steps. , in this case L
→N-)R-N->L gear shifts are repeated, but all of the above-mentioned speed change control means require complicated repeated foot and manual operations, and lack ease and speed.

Therefore, we installed a foot control lever and a manual control lever, and depending on the foot control lever, N++R was disabled and NHR control was entrusted to the manual control lever, and the control range of the manual control lever was expanded to R4-1N++L. There is an idea to simplify the above-mentioned forward/reverse switching operation. In this case, the shift cam is driven by two drive systems, but there are problems in that the number of parts increases and mutually related operation regulations become intertwined, resulting in a complicated mechanism and a large-scale device.

(Problem to be solved by the invention) In a vehicle speed change control device using a rotary type shift cam, a foot control lever can be used to
to H, and press R using the manual control lever.
-N-L is selected to achieve both safety and operability, but there is a problem that the main drive mechanism and sub-drive mechanism need to be linked to one shift cam, which complicates the mechanism. In view of this, it is an object of the present invention to solve this problem and provide a speed change control device for a two-system drive vehicle that operates smoothly using a compactly organized mechanism.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, in the vehicle shift control device of the present invention, the shift cam that controls the shift gear mechanism is set to the neutral, low, second, third, high and The main drive mechanism and the manual control lever nub drive mechanism drive the same shift cam to the reverse, neutral, and low positions. The main parts of the sub-drive mechanism are plate-shaped and are coaxially stacked and supported, and the engaging parts with the respective shift cams are arranged on both sides of the shift cam in the diametrical direction.

(Function) In this way, the main drive R structure and part of the sub-drive mechanism were made into plate shapes and placed on the same glaze in an overlapping manner.
The axial thickness is kept to a minimum, and the shift cam moves parallel to the plate surface, and the axial width of the shift cam is increased by arranging the engaging parts of the two drive system shift cams on both sides in the diametrical direction. In addition, by effectively utilizing the space around the shift cam, the shift cam can be housed in the case in a compact space overall. In addition, since the plate-shaped parts overlap and move parallel to the plate surface, a stopper mechanism and a cam mechanism are configured using a bottle protruding in the negative direction and a profile formed in the other side to regulate complex movements related to each other. This allows the foot control lever to control the gear shafts from N to H other than R, and the manual control lever to control the R, N, and L gear shafts, providing both safety and operability. The speed change control device can be configured extremely compactly.

(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 saddle 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 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, and Figure 2 shows the arrow B--B in Figure 3. 3 is a sectional view taken along the line A-A in FIG. 2.

The shift cam 10 has a plurality of cam grooves 11 on its outer periphery, into which pins 13 of a shift fork 12 are fitted, and the shift fork 12 engages with a slide gear or a slide dog of a GX transmission gear mechanism (not shown). shift cam 1
0 rotates by a predetermined angle, the slide gear and slide dog are slid in the axial direction via the shift fork 12, converting the transmission gear mechanism into a gear shift of the required speed stage.The shape of this cam groove 11 is , R→NHL4-) by forward or reverse rotation of the shift cam 10 within a predetermined angle range.
It has a pattern of gear shifting in the order of 2nd 4-) 3rd I-+H. In this case, each stage from N to H has the same pitch, but the RMN gate is set to 1/2 pitch. This is to arrange a blocking portion of the cam groove 11 that prevents gear shifting to -IHR after one revolution of the shift cam. FIG. 3 shows the state when the shift cam 10 is in the N position.

The drive mechanism for pitch-rotating the shift cam 10 includes a main drive mechanism and a sub-drive mechanism.

The main drive mechanism is configured as follows.

First, on the end surface of the shift cam 10, shift bins 14N, 141.14-2nd, 14-3rd, 141.
141-1 is installed protrudingly. In this case, the shift bin corresponding to R is excluded from the arrangement. At the upper part, a feed pawl ball 15 is brought into elastic contact with the upper side of two adjacent shift bins from above.

The feed pawl ball 15 has feed pawls 17a and 17b facing the front side of the two shift bins, and is pivoted to the upper end of the swing arm 16 to swing 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 does not indicate the direction of upshift. The Jll farm 6 is plate-shaped and serves as a support for the manual control intermediate lever 8.
a, and is connected to a link arm 18 arranged in parallel at the back via a bin 19 and a long hole 20, and swings in response to the swing of the link arm 18.

This link arm 18 is also plate-shaped and is fixed to the support shaft 6a of the foot control lever 6.

The base of a clip-shaped spring 22 is supported on the shaft hole boss 21 of the support shaft 6a, and the reference bottle 2 is fixed to the case.
3 and the protruding piece 24 formed on the link arm 18 are sandwiched at the same time. This allows the foot movement control lever 6 to
, the link arm 18, the swing arm 16, and the feed pawl ball 15 are always urged to maintain a neutral position.

Then, by pressing down on the foot control lever 6 or flipping it up at the toe portion and returning it to the neutral position, the shift cam 10 rotates in the forward and reverse directions one pitch at a time, and the transmission gear mechanism is shifted up or down one step at a time. Shift 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 plate-shaped sector l fixed to the support shaft 8a of the manual control intermediate lever 8! 1f The IJ arm 27 is hung behind the link arm 18 so as to overlap. Two drive pins 28a and 28b are protruded from the rear surface of the outer circumference of the swing arm 27 and correspond to driven grooves 29a and 29b formed at the lower part of the outer circumference of the end surface of the shift cam 10, forming a kind of pin gear. The shift cam 10 is moved by the swing movement of the swing arm 27.
It rotates forward and backward. 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 bin 28a is in the middle position.

28b is separated from the driven parts 129a and 29b.

When the swing arm 27 swings in the direction of the arrow, the drive bin 28a engages with the driven groove 29a, rotates the shift cam 10 by one pitch, sends it to the new position (Fig. 5), and swings in the opposite direction. The drive pin 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 this R position, since the shift bin is missing as described above and the feed pawl ball 15 is not lifted, the shift bin 14N
There is a risk that the feed claw 17a will hit the feed claw 17a and the action will be stopped. Therefore, another pin 30 protruding from the swing arm 27 rotates the retainer 31, and the protrusion 32 formed on the retainer 31 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 front edge 27a of the swinging arm 27 is in the position shown in FIG.
comes into contact with the stopper 33 which is attached to the case. When taking the R position, a stopper pin 34 protruding from the back surface of 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 lines connecting the stopper pin 34 and the support shafts 5a, 8a are perpendicular to each other, so that the stopper function is stabilized. 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 mounted on the case.

- direction, when the swing arm 27 is held in the R position as shown in FIG. Rocking is prevented. When the swing arm 27 is in the L position, the stopper bin 34 contacts the stopper edge 38 on the swing arm 27, and at the same time the stopper bin 39 protrudes from the surface of the swing arm 27 and the stopper edge 40 extends on the link arm 18. are in contact with each other and are prevented from rotating in the forward and reverse directions. This stopper bin 34 and stopper edge 38
The posture of the stopper pin 39 and the stopper edge 40 when engaged is also such that the applied force is directed toward the center of the support Td8a, thereby stabilizing the stopper function.

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 rotated to LMH by the action of the main drive mechanism, the swing arm 27 in the N position does not swing because the drive bins 28a and 28b are in contact with the outer circumference 41 of the shift cam 10. Can not. 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. The foot movement control lever 6 is N M L ” 2
n d 83 r d ・H mar is selected, and the manual control lever 7 selects RN→L. 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 swing forward about the support shaft 7a, and moves along a guide plate 43 fixed to the vehicle body side. The upper part of the lever is equipped with a support tube 44 and a grip 45.
The guide pin 47 protruding from the lower end of the support tube 44 is inserted into the guide hole 4 provided in the guide plate 43 with the guide pin 47 protruding from the elongated hole 48 of the support tube 44.
Make elastic contact with the upper edge of 9. This guide hole 49 allows R, N
, the L position, and in the N position, the stepped portion 50 prevents swinging toward the -HR side. Therefore, from N to R, the grip 45 is pushed down, and the stepped portion 5
It becomes possible to operate only after overcoming 0, and was added as a means to prevent careless operation of R.

The arrow indicates the direction of travel of the vehicle.

9 and 10 show other embodiments, FIG. 9 is a developed sectional view taken along the line D-D in FIG. 10, and FIG. 10 is a cross-sectional view taken along the line C-C in FIG.
It is an arrow side view.

A plate-shaped link lever 51 interlocked with the foot control lever 6 allows the plate-shaped swinging arm 16 and the feed pawl ball 1 to be moved.
5. A drive pin 53a of a plate-shaped 11-movement arm 52 that is interlocked with the main drive mechanism and manual control lever 7 that rotate the shift cam 10 intermittently via the shift bins 14N...14H.

53b and driven grooves 54a, 54b to rotate the shift cam 10 in the forward and reverse directions is basically the same as that in the first embodiment. The structural functions of the clip-shaped spring 22, cam stopper 25, pressure roller 26, pin 36, clip 37, etc. are also similar.

A pin 55 corresponding to a shift bin in the R position is provided on the end surface of the shift cam 10, but this pin 55 is connected to the feed pawl ball 15.
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 N-R operation by the sub-drive mechanism, and therefore the retainer shown in the previous embodiment is omitted.

FIG. 10 is a state diagram when the shift cam 10 is in the N position, and the stopper pin 56 protruding from the surface of the swing arm 52 is inserted into the stopper hole 57 formed in the link arm 51, and the stopper pin 56 is inserted into the stopper hole 57 formed in the link arm 51. 57a and stopper pin 5
6, the link arm 51 changes from N to R in this case.
Movement to is blocked. In this state, the swing arm 5
(Fig. 11), which occurs when 2 takes the R position, continues,
Furthermore, the movement of the link arm 51 toward R-+N in this case is also prevented by the stopper edge 57b on the opposite side. Stopper edge 57. C positions the swing arm 52. In the L position of the swing arm 52 (FIG. 12), the swing arm 52 is moved by the stopper pin 56 and the stopper edge 57d.
is positioned.

- On the other hand, the link arm 51 is released from the stopper action,
It can swing freely and shift cam 10 from L to N.

It can be sent from L to 2nd position. This L-+
When the position is N, the swing arm 52 is reversely driven from the shift cam 10 via the driven groove 5481 and the drive pin 53a, and is pulled back to the N position shown in FIG. In addition, in Fig. 6, the link arm 51 makes N→L f, lJ,
The state before the link arm 51 returns to the new 1 helical position is shown, and its stroke is extended by the stopper pin 56 and the stopper edge 57e, and also,
The swing arm 52 also swings to the L position by a cam pin 58 protruding from the back surface of the link arm 51 and a cam face 59 formed on the swing arm 52. When the link arm 51 returns to the neutral position from this state, the swing arm 5
2, the state is exactly the same as that shown in FIG. 4 where N-+L is set.

From L position L H2n d (→3rd M
A transition to H is possible only by 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 pin 56 and the stopper edge 57d and the stopper 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 movement control lever 6 controls each step from N←G1,
The manual control lever 7 controls the position of R4-N→L, and the operation of both control levers 6.7 can be changed to the N position, and the manual control lever 7 controls the NIL position of the foot control lever 6.
The lever position changes to the N-L position in conjunction with the operation, making the operation easier (and faster).

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.

〔Effect of the invention〕

As described above, in the vehicle speed change control device according to the present invention, a rotary shift cam is controlled by two drive mechanisms, and the main drive mechanism and the sub-drive mechanism are formed into plate shapes and are coaxial. In addition to being stacked on top of each other and supported pivotably, the engaging parts for each shift cam are placed on both sides of the shift cam in the diametrical direction.When the vehicle is moving backwards, continuity of operation is interrupted to ensure safety. It is possible to repeatedly move the vehicle forward and backward with only a manual control lever, and the mechanism is compactly configured for ease and speed of operation, and has the effect of ensuring reliable operation.

[Brief explanation of drawings]

FIG. 1 is a side view of a straddle-type four-wheeled vehicle showing an embodiment of the present invention, FIG. Figure A-A side view, Figure 4~
Fig. 6 is a side view showing the operating state of the shift cam drive system, Fig. 4 shows when the shift cam is moved to the reverse position by the sub-drive mechanism, Fig. 5 shows the low position by the sub-drive mechanism, and Fig. 6 shows the main shift cam. The second positions of the drive mechanism are shown, with Fig. 7 being an enlarged side view of the positioning clip of the swing arm, Fig. 8 being an enlarged side view of the manual control lever, and Fig. 9 showing another embodiment of the shift cam drive system. FIG. 10 is a sectional view taken along the line D-D showing an example, and FIG. 10 is a side view taken along the line C-C shown in FIG.
Figures 11 to 14 are side views showing the operating state of the shift cam drive system as described above. Figure 11 is the reverse position by the sub-drive mechanism, Figure 12 is the low position by the sub-drive mechanism, and Figure 13 is the main drive mechanism. sends the shift cam to the low position, and just before returning, the 14th
The figures each show the second position by the main drive mechanism. 6... Foot control lever 6a... Support shaft 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 H...Shift pin 15...Feed claw ball 1
6... Swinging lever 17a, 17b-... Feed claw
18.51... - Link arm 25... Cam stopper 26... Blessi II roller 27.52.
... Swinging arm 28 a, 28b, 53a, 53b ... Drive pin 2
9a, 29b, 54 a, 54b... driven groove. Figure I $2 g 2'? J Fig. 9 qK

Claims (1)

[Claims] The main drive mechanism for the foot control lever drives the shift cam that controls the transmission gear mechanism to positions other than reverse, such as neutral, low, second, third, and high, and the same shift cam is used to move the same shift cam to reverse, neutral, and other positions.
In a speed change control device consisting of a sub-drive mechanism for a manual control lever that is driven to the low-only position, the main drive mechanism and the sub-drive mechanism are made into plate shapes and are overlaid and supported on the same axis, and each A vehicle speed change control device characterized in that engaging parts with the shift cam are arranged on both sides of the shift cam in the diametrical direction.