JPH07771Y2 - Shift cam stop device for variable speed control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of Invention] (Field of Industrial Use) The present invention relates to a shift cam stopper device of a shift control device for controlling a shift gear mechanism using a rotary shift cam.

(Prior Art) Many transmissions for vehicles such as saddle-ride type four-wheeled vehicles are controlled by a rotary shift cam, and the shape of the shift cam is reverse, neutral, low, second,
Third, high ... (abbreviated as R, N, L, 2nd, 3rd ... H below)
If the pattern is set to shift up or down in the order of, care must be taken to prevent backward movement. Therefore, there are two systems, a main drive mechanism related to foot movement control and a sub-drive mechanism related to manual control. The main drive mechanism selects N to H other than R, and the sub-drive mechanism selects R, N, L
, And the operation of both can be exchanged only at the N position. When the vehicle moves backward, safety is established by interrupting the continuity of the operation, and the fine forward and backward movement can be operated only by the manual control. , Simplifies and speeds up the operation.

The main drive mechanism combines a shift pin pitched on the end face of the shift cam with a feed pawl pole on the swing lever to rotate the shift cam forward or backward by one pitch each time the swing lever reciprocates from the neutral position to the front or rear. A conventionally known drive mechanism is used to remove one of the shift pins or use a stopper so that the shift pin cannot be moved to the R position. The sub-drive mechanism constitutes an approximate pin gear mechanism by the drive pin on the swing arm and the driven groove arranged on the outer periphery of the end surface of the shift cam, and the shift cam rotates forward and backward according to the forward and backward swing of the swing arm. Only the position of RNL is selected by restricting the swing stroke of.

On the other hand, in this type of rotary shift cam, a petal-shaped cam stopper is used in order to accurately regulate and hold the rotational position. The petal-shaped stopper has a valley portion having the same pitch as the shift pin array, and has a function of elastically contacting the valley roller with a pressure roller set at a fixed position for positioning. The pressure roller is supported by the tip of a relatively long lever and set at a predetermined position, and the axial position is unstable, and there is a concern that it will come off the cam stopper. Since this part is crowded, it is difficult to install a guide that stabilizes the axial position. In particular, in the case where the grooved gear portions of the approximate pin gear mechanism are arranged immediately adjacent to each other due to the juxtaposition of the sub-drive mechanism as described above, if the axial direction is not stable, the pressure roller will move to the outer peripheral portion of the grooved gear portion. There is a problem that it is easy to get on and loses its function as a cam stopper. This problem can be solved by increasing the width of the cam stopper, but this cannot be adopted because the axial length of the shift cam is lengthened and the arrangement of each part is lengthened accordingly.

(Problems to be Solved by the Invention) In accordance with the above object, the shift control device for a vehicle of the present invention shifts up or down the shift gear mechanism in reverse, neutral, low, second, third ... high order. A feed type pawl pivotally supported by a rocking lever is elastically contacted with a shift pin arranged on the end face of the shift cam, which is equipped with a rotary shift cam, and the feed pawl provided on the feed pawl pole is engaged with the shift pin as the rocking lever swings. The main drive mechanism that rotates the shift cam forward and backward by combining them and the drive pin arranged on the outer peripheral part of the swing arm in correspondence with the driven groove of the groove gear part arranged on the outer periphery of the shift cam end. A sub-drive equipped with an approximate pin gear mechanism that engages the drive pin with a driven groove to rotate the shift cam forward and backward. The main drive mechanism is set so as not to shift to the reverse gear by lacking the shift pin that should correspond to the reverse gear, and the sub-drive mechanism is set to the swing stroke of the swing arm by the swing angle regulation means. In the one where the range is restricted and only reverse, neutral, and low positions are selected, at one end of the shift cam,
A petal-shaped cam stopper with valleys arranged at the same pitch as the shift pin array is fixed, and a pressure roller that makes elastic contact with the outer circumference of this cam stopper is provided, and the outside of this pressure roller is covered with the swing arm and swings on the outer surface of the pressure roller. A guide pin extending toward the arm is provided so that its outer end is in sliding contact with the inner surface of the swing arm.

(Operation) As described above, in this invention, since the pressure roller that makes elastic contact with the cam stopper is located behind the center of the swing arm, even if the swing arm swings back and forth, it is always in the profile. The protruding guide pin slides into contact with the pressure roller, and the pressure roller is always regulated in outward displacement so as to properly make elastic contact with the cam stopper. Therefore, even if the widths of the cam stopper and the pressure roller are set to the necessary minimum, a stable action can be obtained, the axial length of the shift cam can be minimized, and the mission case can be made compact and this type of It is possible to provide a shift cam stopper device of a gear shift control device of foot movement and manual two-system control.

(Embodiment) Hereinafter, a drawing showing an embodiment of the present invention will be described in detail.

FIG. 5 is a side view of a saddle-ride type four-wheeled vehicle showing an example of 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 by an engine 3 mounted on the front and rear sides thereof. Drive wheels 1 and 2 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.

6 and 7 show the shift cam of the transmission and its drive system, and FIG. 6 is a sectional view taken along the line D-D in FIG.
FIG. 7 is a sectional view taken along the arrow CC in FIG.

The shift cam 10 has a plurality of cam grooves 11 on the outer circumference, and the pins 13 of the shift forks 12 are fitted in the shift cams 10, respectively.
Reference numeral 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, a slide gear,
The slide dog is slid in the axial direction to convert the transmission gear mechanism into a gear shift of a required speed stage. The shape of the cam groove 11 is gear shift in the order of RNL2nd3rdH by the forward or reverse rotation of the shift cam 10 within a predetermined angle range. Have a pattern to do. 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. FIG. 7 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 feed claw pole 15 is elastically contacted with the outside of the two adjacent shift pins.

The feed pawl pole 15 has feed pawls 17a and 17b that face the two shift pins in the front-rear direction, and is pivotally supported by the tip of the rocking lever 16 so as to rock forward or backward from the neutral position (position in FIG. 7). And then returns to the neutral position again, which causes the feed claws 17a,
17b sequentially engages with the respective shift pins 14N, 14L, 14-2nd, 14-3rd, 14H to rotate the shift cam 10 by one 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 a pin 19 is provided on a link arm 18 provided opposite thereto.
The link arm 18 is connected to the link arm 18 through the long hole 20 and swings in accordance with the swing of the link arm 18.

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.

Then, the shift cam 10 is normally or reversely rotated by every pitch by forward or reverse operation strokes in which the foot movement control lever 6 is stepped down or flipped up at the toe portion and immediately returned to the neutral position.
The transmission gear mechanism is shifted up or down by one step. However, as described above, since the shift pin corresponding to R is lacking, the operation of the foot movement control lever 6 is invalidated and the shift cam 10 cannot be sent to the R position. 25 is a petal-shaped cam stopper formed on the shift cam 10, and the pressure roller 26 makes elastic contact with the shift cam.
It accurately regulates 10 pitch rotations.

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. Two drive pins 28a, 28b are provided on the outer peripheral portion of the swing arm 27 so as to form a kind of pin gear corresponding to the driven grooves 29a, 29b formed in the groove gear portion 29 on the end face of the shift cam 10. When the swing arm 27 swings, the drive pins 28a, 28b move the driven grooves 29a, 2b.
The shift cam 10 is rotated forward and backward by engaging with 9b. As shown in FIG. 7, when the shift cam 10 is in the N position, the swing arm 27 is in the intermediate position, and the drive pin 28a,
28b is out of the driven grooves 29a and 29b.

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 by one pitch to send it to the L position (Fig. 9), and when it swings in the opposite direction, the tribe pin 28b engages the driven groove 29b and shift gear 10 moves. Turn 10 a half pitch and send it to the R position (Fig. 8). When sending to the R position, since the shift pin is not provided 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 the swing angle regulation means. In the L position, as shown in FIG. 9, the front edge 27a of the swing arm 27 is shown.
Comes into contact with the stopper 33, which is the first swing angle restricting means installed in the case. When taking the R position, the stopper pin 34 projecting from the link arm 18 is applied to 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 stopper pin 34 and the stopper groove serve as a second swing angle regulating means, and the engagement position thereof is the stopper pin.
The lines connecting 34 and the support shafts 6a and 8a are set at positions orthogonal to each other so that the stopper function is stable.

As shown in FIG. 7, the swing arm 27 holds the R, N, L positions of the arm itself by a pin 36 protruding from the rear surface and a positioning clip 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 be operated only when the swing arm 27 is in the N position (FIG. 7). On the contrary, when the shift cam 10 is rotated to LH by the action of the main drive mechanism, the drive pins 28a and 28b of the swing arm 27 in the N position are in contact with the outer circumference 41 of the groove gear portion 29. ,
It cannot be swung (see Fig. 10). 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. Manual control lever 7 for reversing the vehicle
It is controlled only by itself, the continuity from the foot movement is cut off, and safety can be secured. On the other hand, the forward / backward repetition can be controlled only by the manual control lever 7, so that easiness and quickness are added.

As shown in FIGS. 1 and 2, the petal-shaped cam stopper 25 is separately manufactured and fixed to the end of the shift cam 10. The cam stopper 25 has valleys at the same pitch as the shift pin array.
25a is arranged, and the turning position is regulated by the pressure roller 26 dropping in here. The pressure roller 26 is a lever 61 that is pivotally supported on a case or the like and is swingable.
Supported at the tip of the cam stopper by the spring 62
Bullet into 25. The outside of the pressure roller 26 is covered with the fan-shaped swing arm 27.

A guide pin 26a extending toward the swing arm 27 is provided on the outer surface of the pressure roller 26 so as to project therefrom. This guide pin 2
6a is an extension of a part of the caulking pin connecting the pressure roller 26 to the lever 61, and the outer end of the caulking pin slidably contacts the inner surface of the swing arm 27. Even when the swing arm 27 swings back and forth,
Even when the shift cam 10 rotates and the pressure roller 26 swings by the cam stopper 25, the guide pin 26a swings and contacts the back surface of the swing arm 27. Therefore, the pressure roller 26 is restricted in its outer position by the swing arm 27, and does not ride on the outer peripheral surface 41 of the groove gear portion 29.

Next, FIG. 11 shows another embodiment.

By the link lever 51 interlocking with the foot movement control lever 6, the swing arm 16, the feed claw pole 15, the shift pin 14N
... The drive cam 53a, 53b of the swing arm 52 and the driven grooves 54a, 54b of the groove gear 54 interlock with the main drive mechanism for intermittently rotating the shift cam 10 via 14H and the manual control lever 7, and the shift cam 10 is normally or reversely rotated. The rotating mechanism is basically the same as that of the first embodiment. The constituent actions of the clip-shaped spring 22, the cam stopper 37, the pressure roller 26, the pin 36, etc. are also the same.

A pin 55 corresponding to the shift pin at the R position is provided on the end surface of the shift cam 10, but this is not for sending the shift cam 10 to the R position by the feed pawl pole 15, but the feed pawl pole 15 is lifted to move the N → by the sub drive mechanism.
Since it does not hinder the operation of R, the retainer shown in the above embodiment is omitted.

FIG. 11 is a state diagram when the shift cam 10 is in the N position, in which the stopper pin 56 protruding from the swing arm 52 is fitted into the stopper hole 57 formed in the link arm 51, and the stopper edge 57a and the stopper edge 57a. The abutment of the pin 56 prevents the link arm 51 from moving in this case from N to R. This state continues even when the swing arm 52 takes the R position (Fig. 12), and further, the stopper edge 57 on the opposite side.
The movement of the link arm 51 in this case from R to N is also blocked by b. The stopper edge 57c positions the swing arm 52. At the L position of the swing arm 52 (FIG. 13), the swing arm 52 is positioned by the stopper pin 56 and the stopper edge 57d. On the other hand, the link arm 51 is released from the stopper action and can freely swing, and the shift cam 10 can be sent to the L → N, L → 2nd position. This L →
In the case of N, the swing arm 52 is reversely driven from the shift cam 10 through the driven groove 54a and the drive pin 53a, and is returned to the N position shown in FIG. Further, FIG. 14 shows a state before the link arm 51 performs the N → L operation and the link arm 51 returns to the neutral position, but its stroke is restricted by the stopper pin 56 and the stopper edge 57e, and The cam pin 58 provided on the arm 51 and the cam face 59 formed on the swing arm 52 also swing the swing arm 52 to the L position. When the link arm 51 returns to the neutral position from this state, the swing arm 52 brings about the same state as N → L shown in FIG.

The transition from the L position to the L2nd3rdH is possible only by the link arm 51. Figure 15 shows the state of the 2nd position. The swing arm 52 is maintained in its posture by the stopper action of the stopper pin 56 and the stopper edge 57d and the stopper action of the drive pin 53a contacting the outer periphery 60 of the groove gear portion 54 at the outer end of the shift cam 10.

With the above configuration, in the second embodiment, the foot control lever 6 controls each step up to NH, the manual control lever 7 controls the position of RNL, and the operation of both control levers 6, 7 is The N and L positions can be converted, and the manual control lever 7 changes the lever position to the NL position in conjunction with the NL operation of the foot movement control lever 6, so that the operation is easier and quicker.

3 and 4 show the cam stopper 37 of the second embodiment.
Is an enlarged view of. The cam stopper 37 has troughs 37a arranged at the same pitch as the shift pin array, and the swing arm 5
(2) The rotation of the shift cam 10 is correctly regulated by the pressure roller 26 located behind the central portion. A guide pin 26a projects from the outer surface of the pressure roller 26 and contacts the back surface of the swing arm 52. As a result, the action of the pressure roller 26 being restricted to the outer position is the same as that of the combination with the cam stopper 25.

[Effect of device]

As described above, in the shift cam stopper device of the shift control device according to the present invention, the shift cam is controlled by two systems of foot movement and manual operation. In the shift cam stopper device, the pressure roller elastically contacting the outer periphery of the cam stopper is located behind the central part of the swing arm. , A guide pin protruding on the outer surface is brought into sliding contact with the back surface of the swing arm, and the axial position of the pressure roller is regulated by the existing swing arm without placing a special guide member, and the function of the cam stopper is achieved. And the widths of the cam stopper and the pressure roller can be set to a minimum, which has the effect of making this device and related devices compact.

[Brief description of drawings]

FIG. 1 is a side view of a cam stopper showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIG. 3 is a side view of a cam stopper showing another embodiment. 3 is a sectional view taken along the line BB in FIG. 3, FIG. 5 is a side view of a saddle-ride type four-wheel vehicle showing an example of a vehicle equipped with the device of the invention, and FIG. 6 is a shift cam drive system of FIG. Fig. 7 is a developed sectional view taken along the line D-D, Fig. 7 is a side view taken along the line C-C of Fig. 6, and Figs. 8 to 10 are side views showing the operating state of the shift cam drive system. When the shift cam is moved to the reverse position by the drive mechanism, FIG. 9 shows the low position by the sub drive mechanism, FIG. 10 shows the second position by the main drive mechanism, and FIG. 11 shows another embodiment of the shift cam drive system. The side view shown in FIGS. 12 to 15 is the same as that of the shift cam drive system shown in FIG. Fig. 12 is a side view. Fig. 12 shows the reverse position by the sub-drive mechanism, Fig. 13 shows the low position by the sub-drive mechanism, Fig. 14 shows the main drive mechanism sending the shift cam to the low position, and immediately before returning. Fig. 15 shows the main position. It is a figure which each shows the 2nd position by a drive mechanism. 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 pole, 16 …… Swing lever, 17a, 17
b …… Feed claw, 18,51 …… Link arm, 25,37 …… Cam stopper, 26 …… Pressure roller, 26a …… Guide pin, 27,52 …… Swing arm, 28a, 28b, 53a, 53b… … Drive pin, 29,54 …… Groove gear part, 29a, 29b, 54a, 54b… Driven groove, 33 …… Stopper which is the first swing angle restricting means,
34 …… Stopper pin which is the second swing angle restricting means, 35 ・ ・ ・
... A stopper groove which is a second swing angle restricting means.

Claims (1)

[Scope of utility model registration request] 1. A transmission gear mechanism for reverse, neutral,
Low, second, third ... High rotary shift cam that shifts up or down in the order of high. The feed pin pawl pivotally supported by the swing lever is elastically contacted with the shift pin arranged on the end face of the shift cam to swing the swing lever. The main drive mechanism that rotates the shift cam forward and backward by engaging the feed claw provided on the feed claw pole with the movement of the shift pin, and the driven groove of the groove gear part arranged on the outer circumference of the shift cam end. A sub-drive mechanism provided with an approximate pin gear mechanism that allows the arranged drive pins to correspond to each other and causes the shift pin to rotate forward and backward by engaging the drive pin with the driven groove as the swing arm swings. The main drive mechanism is designed to prevent shifting to the reverse gear by lacking the shift pin that should correspond to the reverse gear. Is, the sub-drive mechanism reverse is restricted swing stroke range of the swing arm by the swinging angle restriction means, neutral, in that selecting the position of the row only one end of the shift cam,
A petal-shaped cam stopper with valleys arranged at the same pitch as the shift pin array is fixed, and a pressure roller is elastically contacted with the outer circumference of this cam stopper. A shift cam stopper device for a shift control device, characterized in that a guide pin extending toward the swing arm is provided in a protruding manner, and an outer end of the guide pin is brought into sliding contact with an inner surface of the swing arm.