JP3399026B2 - Transmission operating device for traveling transmission - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift operation device for a traveling transmission device such as a combine, a tractor, a seedling planter, and a transport vehicle. 2. Description of the Related Art Conventionally, traveling with a continuously variable transmission belt has been known.
As a transmission device, for example, Japanese Utility Model Application No. 2-39686 (actual application)
No. 4-71847).
As shown in the figure, the planetary transmission system through the planetary gear mechanism
And a continuously variable transmission system through a high speed belt.
Output rotation from the transmission gear to forward / reverse
Left and right traveling shafts via left and right wheel gears via latch
Transmissions that are designed to transmit power to travel
I have. [0003] However, the split plan
In the case of the continuously variable transmission using the continuously variable transmission belt having the ribs, the transmission is not performed unless this belt transmission is being performed. For this reason, if the rotation stops due to an engine stop or the like during the transmission, the split pulley cannot be moved to perform a shift, so that the shift lever cannot be moved either. In many cases, the shift operation mechanism is bent in an attempt to forcibly move. [0004] Further , the above-mentioned Japanese Utility Model Application No. 2-39686 (Japanese Utility Model Application
No. 4-71847).
With this technology, even if the speed of the continuously variable belt transmission is shifted,
The planetary transmission system and the continuously variable belt transmission system
Output rotation is always in the same direction,
To drive forward or backward from the vehicle
Forward / reverse switching clutch for forward / reverse switching in conjunction with bar operation
Switch must be configured to switch. [0005] For this reason, the traveling transmission device itself and its speed change operation are controlled.
The drawback is that the construction of the device is complicated and cannot be provided at low cost.
is there. In addition, the vehicle travels while continuously switching between forward and reverse.
When the forward / reverse switching clutch is switched,
Occurs, and the forward / backward switching of the running state can be performed smoothly.
There are drawbacks that can not be done. SUMMARY OF THE INVENTION The present invention provides the above
Take the following technical measures to resolve the issues:
You. In other words, the driving torque from the engine E side to the input
A pulley 17 driven by a belt 39 via a latch 40;
The drive gear 9 and the split pulley 11 are provided integrally,
The sun gear 3 and the split pulley 12 are integrated with the transmission shaft 4.
Ring gear meshed with the drive gear 9
10 and the inner circumference of the ring gear 10 and the sun gear 3.
Having the shaft 21 of the planetary gear 20
A body-rotating transmission gear 22 is rotatably provided, and the input gear
Split pulley 11 provided on shaft 1 and split pulley provided on transmission shaft 4
Wound around the continuously variable belt 13 and 12, before the output rotation obtained by the continuously variable belt transmission system B through the planetary transmission system A and the stepless belt 13 through the planetary gear mechanism 2
From the transmission gear 22 through the left and right wheel gears 26,
The transmission is configured to be transmitted to the traveling shaft 7, and the continuously variable transmission
When the automatic transmission system B is configured to be capable of shifting, the input shaft
1 and the split pulley 1 provided on the transmission shaft 4.
Operation of cams 37 and 38 having arms 27 and 28
To change the pulley diameter by moving in each axis 1 and 4 directions.
And a rod 29 between the arms 27 and 28.
Connected to one of the two arms 27 and 28
Arm 28 to an interlocking arm 34 via rods 30 and 35
Linked, the linked A - arm 34 and lever - by the key 60 - blurring
Between the shift lever -3 2 capable frictional holding the shift operating position Te, interlocking A constant position relative to the shift lever -32 - arm 3
4 provided the return spring 33 returns, Misao the speed-change lever -32
Change the pulley diameter of both split pulleys 11 and 12 depending on the operation
And the rotation of the sun gear 3 with respect to the ring gear 10 having a constant rotation.
The transmission from the transmission gear 22 is achieved only by changing the number of turns.
Neutral left and right rotation of the wheel shaft 26 and the running shaft 7 which is moving
The gear can be shifted from N to forward F range and reverse R range.
The idler is moved by the return spring 33 of the speed change lever 32.
The traveling clutch 4 by operating at the neutral N position area that may
A neutral position switch 75 for turning on and off 0 is provided .
When the speed lever 32 is moved forward or backward in the neutral N position area,
When the rotation operation is performed to the rotation R side, the rotation
Before the speed change belt transmission system B is shifted, the front
When the neutral position switch 75 is turned on and the traveling clutch 4
And the input shaft 1 and the continuously variable transmission belt 13
Driving transmission characterized by being configured to be driven
The configuration of the shift operation device is shown in FIG. [0007] In traveling transmission apparatus, a planetary gear mechanism 2
Output rotation resulting I by the the continuously variable belt transmission system B through the planetary transmission system A and the stepless belt 13 passing through the found transmission
Left and right traveling shafts from gear 22 via left and right wheel gears 26
7 is transmitted to, Ru is rope sequentially sequentially fast shifting and the line of high-speed gear and the reverse rotation R side from the neutral N to the forward F side. That is, the return spring 3 is provided by the speed change lever 32.
3, interlocking arm 34, rods 29, 30, 35, both arms
Activate cams 37 and 38 via programs 27 and 28 and input
Split pulley 11 provided on shaft 1 and split pulley provided on transmission shaft 4
12 in each axis 1 and 4 directions to change the pulley diameter.
When the speed of the continuously variable transmission belt transmission system B is further shifted, when the rotation of the sun gear 3 due to the continuously variable transmission is balanced with the constant rotation of the ring gear 10 , the neutral gear N where the transmission gear 22 is not rotated
A state, continuously variable belt transmission system B so as boundary
By shifting the height of the rotation transmission by the shift formate
Gear 22 is continuously and continuously variable, and the traveling drive speed is
Or increase deceleration in the band, increase or decrease speed in the reverse R range. [0009] In addition, the neutral N position place the gear shift lever -32
When, the switching <br/> running clutch 40 by the neutral position switch 75, up the input shaft 1 from the engine E side - belt Li 17
39 is not transmitting, the planetary transmission system A and the continuously variable belt transmission
The transmission to the system B is not performed, and the vehicle stops running. [0010] shift lever -32 performing such stepless operation, Rebabure - in order to pivot the operation against the key 60, even release the shift lever -32, shift lever -3
The second shift operation position does not change , and the continuously variable shift state can be maintained. Lever the shift lever -32 - blur - the against the key 60 is rotated back through the spring 33 continuously variable belt transmission system B is continuously variable. [0011] Incidentally, such as by stopping the continuously variable belt transmission system B, or engine E, the continuously variable belt 13
When the rotation of the cams is stopped, the cams 37, 38,
Arm 27, rod 29,30,35及beauty communicating Doa - because beam 34 is that such not be rotated, by operating the shift lever -32
Allowing rotation of the shift lever -32 by the action of the spring 33 back to when he, the rotation operating position lever - is maintained by key 60 - blur. As described above, even when the transmission of the continuously variable transmission belt transmission B is stopped, the operation of the transmission lever 32 in the neutral N region is possible, and the transmission lever 32 is moved within the neutral N position region.
When the rotation operation is performed to the forward rotation F side or the reverse rotation R side, the return spring 33 is rotated.
Until the speed change operation of the continuously variable transmission B is performed
During this time, the neutral position switch 75 is
Switch 40 enters the input shaft 1 and the continuously variable transmission belt 13.
When the shift lever 32 is operated in the forward rotation F or the reverse rotation R to shift the speed, the planetary transmission system A, the continuously variable transmission belt transmission system B and the like are already driven. Transmission by the engagement of the clutch 40 is performed, and continuously variable transmission
After the belt transmission system B starts driving, the split pulley 11, 1
2 moves in each axis 1 and 4 directions.
- Change of Li diameter, i.e. the shift operation is Ru performed smoothly. According to the present invention, the transmission lever 32
By operating to the reverse F side or the reverse R side,
Switching operation of the forward / reverse switching clutch for reverse switching
Running while continuously switching between forward and reverse
This makes it possible to smoothly switch back and forth between these running conditions.
It is possible to improve running performance. The transmission of the continuously variable transmission B is stopped.
Above all, the shift lever 32 can be operated in the neutral N range,
When the speed lever 32 is moved forward or backward in the neutral N position area,
When the rotation operation is performed to the rotation R side, the stepless change is performed via the return spring 33.
Until the speed belt transmission B is shifted,
Switch 75 is turned on and the traveling clutch 40 is turned on.
To drive the input shaft 1 and the continuously variable transmission belt 13.
Therefore, the shift lever 32 is moved in the range of the forward rotation F or the reverse rotation R.
When changing the speed by operating
The belt transmission system B, etc. has already
And the continuously variable transmission B is driven.
Is started, the split pulleys 11 and 12 move in the directions of axes 1 and 4
Because of the movement of the pulley,
Speed operation can be performed smoothly, and
This shifting operation can be performed without damaging the shifting operation system.
Operability of shifting operation of traveling transmission device which can be easily performed
Can be improved. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The gear 2 has a split shape in the left-right axis direction, in which an upper portion supports the input shaft 1 and the speed change shaft 4, and a lower portion supports the intermediate shaft 15, the steering clutch shaft 6, and the left and right traveling shafts 7. One end of the input shaft 1 and the transmission shaft 4 is connected to the pulley shafts 1B, 4B.
B, a belt case 16 is provided so as to be openable and closable, and a continuously variable transmission belt 13 and a split type transmission pulley 11, which stretches the belt 13, are provided.
12 mag. At the outer end of the input shaft 1, there are provided a pulley 17 for transmitting a belt 39 from the engine E side, a power take-off pulley 18 for transmitting a belt to a reaper, and the like.
9 has a drive gear 9. In the belt case 16 of the input shaft 1, a pulley shaft portion 1B is detachably connected by spline fitting, and has a split pulley 11. The transmission shaft 4 includes a ring gear 10 which is rotated by meshing with the drive gear 9 in a gear case 19, a carrier 14 of a planetary gear 20 meshed with the inner periphery of the ring gear 10, and The carrier 14 and the shaft 21 of the planetary gear 20
A transmission gear 22 and the like, which are integrally rotated via a shaft, are mounted on the shaft. The belt case 16 has a pulley shaft portion 4B which can be detachably attached to the transmission shaft 4 by spline fitting. A pulley 12 is provided. The split shaft of the pulley shafts 1B and 4B
The pulleys 11 and 12 are configured such that the split pulley spacing in each axial direction, that is, the pulley diameter can be changed, and the transmission by the belt 13 wound around these can be shifted. The transmission shaft 4 is shifted by the continuously variable transmission belt 13. The sun gear 3 rotates integrally. The ring gear 10, the carrier 14, the transmission gear 22 and the like are rotatably provided. ing. A gear case 19 has an intermediate gear 23 on the intermediate shaft 15 meshed with the transmission gear 22.
, The ring gear 2 rotatable on the steering clutch shaft 6
4 can be rotated interlockingly. The steering clutch 5 is turned on and off on both left and right sides of the ring gear 24 by a shifter arm 25, and the left and right traveling shafts 7 are transmitted via a wheel gear 26 meshing with the gear portion of the steering clutch 5. is there. The speed of the continuously variable transmission belt 12 is changed by connecting rods 29 between arms 27 and 28 having cams 37 and 38 for moving the pulleys 11 and 12 in the axial direction. The arm 28 is interlocked with a bell crankshaft 31 which is rotatably supported on the transmission case 8 via a rod 30 having a universal joint, and is returned by turning the speed change lever 32 in the front-rear direction. The structure is such that a stepless speed change operation can be performed via a spring 33, an interlocking arm 34, a rod 35 and the like. 6
Reference numerals 2 and 63 denote cam rollers rotatable at fixed positions for sliding the cams 37 and 38. The transmission lever 32 and the transmission interlocking mechanism 61
A lever shaft 66 is fixedly or rotatably provided on a bracket 65 of a frame 64 of the control console 47, and a lever arm 67 is provided around the lever shaft 66 with a brake lining disk. It is rotatably supported so as to be frictionally braked by being clamped at 68, and is tightened with a nut 69 from the outside via a spring 70. The shift lever 32 is provided with the lever lever.
The lever 67 is pivotally supported on the upper end of the lever 67 by a swing shaft 71 extending in a direction perpendicular to the lever shaft 66. A rotatable interlocking arm 34 is supported on the other end of the lever shaft 66, and a speed change interlocking mechanism 61 is connected to one end of the interlocking arm 34. A pin 72 protrudes from the upper end of the interlocking arm 34 toward the lever arm 67, and is positioned inside the pin 73 protruding from the lever arm 67. - at both ends of the return spring 33 which is fitted and supported around the shaft 66, and the both of these pins 72 and 73 to both be clamped, both pins 7
2, 73 can be rotated and returned to the same phase. Thus, the transmission lever 32 is moved to the brake 6
When operated to rotate against a 0, a spring 33 return from the pin 73
The interlocking arm 34 integrated with the pin 72 is rotated via
The shift interlocking mechanism 61 is operated in interlock. The traveling transmission is performed by changing the rotation speed of the sun gear 3 with respect to the ring gear 10 having a constant rotation while the pulleys 11 and 12 are shifted by the shift lever 32 by the drive of the input shaft 1. The gear can be shifted from the neutral N to the normal rotation F high-speed range and vice versa, but when the reverse drive or the engine braking is effected from the traveling shaft 7 side like downhill, the steering clutch 5 In this state, the transmission gear 22 and the carrier 14 of the planetary gear mechanism 2 are driven in reverse from the traveling shaft 7 side. Therefore, even if the planetary gear 20 revolves around the carrier 14, the input shaft 1 and the stepless Being meshed between the ring gear 10 and the sun gear 3 which do not move through the speed change belt 13 and the speed change shaft 4 and the like, the revolution is regulated, so that the internal braking is performed and the reverse drive is braked. Become. In particular, when the traveling clutch 40 including the tension clutch pulley to the input pulley 17 by the belt 39 is disengaged and the input shaft 1 is not driven, the continuously variable transmission belt 13 is not rotated. No driving is performed even if the sun gear 3 side is reversely driven. 36 is a gear case 19 and a belt case 16
Between the input shaft 1 and the transmission shaft 4. An example of a combine having such a traveling transmission will be described. A crawler 44 is bridged between a sprocket 41 driven by the pair of left and right traveling shafts 7, an intermediate wheel 42, and an end wheel 43.
The transmission case 8 is provided at the front of a chassis 45 having a pair of left and right rollers 44, and a belt 39 and a traveling clutch 40 from an engine E mounted below the lateral cockpit 46.
Can be transmitted by the tension of A shift lever 32 for shifting the continuously variable transmission belt 13 is provided on a control table 47 on the side of the cockpit 46, and is rotated in the front-rear direction to operate from the neutral N position to the forward forward F position. The speed can be continuously changed at a high speed in a forward direction, and the speed can be continuously changed at a high speed in a reverse direction as the rearward R position is operated. The steering table 47 is provided with a power telescopic lever 48, and the steering is performed by operating the steering clutch 5 and the shifter 25 of the steering brake 86 by the left and right inclination of the power telescopic lever 48. The mowing device 49 can be moved up and down. The cutting device 49 includes a cutting frame 50, a cutting blade device 51, a grain stalk raising device 52, a grain stalk raking device 53, a transport device 54 for transporting the cut grain culm, and the like.
A support shaft 55 at the rear end of the frame 50 is rotatably fitted up and down on a cutting support metal 56 on the transmission case 8, and a hydraulic pressure provided between the chassis 45 and the cutting frame 50 is provided. The lifting and lowering control of the reaper 49 is performed by a cylinder. A threshing device 58 is mounted at the rear of the undercarriage 45 for threshing the culm conveyed by the conveying device 54 between the feed chain 57 and the clamping rod and threshing it while transferring it backward. The transmission by the belt 39 from the engine E to the input pulley 17 is performed when the planetary gear mechanism 2 is provided on the second transmission shaft 4 next to the input shaft 1, and the input shaft 1 and the pulley The diameter of the rim 17 can be reduced, and the transmission case can be made compact so that the left and right crawlers 44 and the like can be brought closer to the inside. The input shaft to the reaper 49 is located at a support shaft 55, and a belt is provided between the pulley 59 fixed to the cockpit 46 and the power take-out pulley 18 of the input shaft 1. It is transmitted. Since the pulleys 59 and 18, the input pulley 17 from the engine E, the speed change bell crankshaft 31 of the continuously variable transmission belt 13, and the like are provided on the control table 47 side, The opening / closing operation of the transmission case 8 from the outside of the belt case 16 is easy. If the belt case 16 is removed from the gear case 19 side, the pulleys 11 and 12 and the continuously variable
Since the connection between the rod 30 connected to the bell crankshaft 31 and the arm 28 and the rod 29 is separated by pulling out the connection pin 74, the push-up operation is performed.
The reshaft portions 1B and 4B can be taken out by removing the spline fitting between the input shaft 1 and the transmission shaft 4. The traveling clutch 40 is operated by an electric motor that rotates forward and backward, and can output a control circuit of the transmission motor by turning on and off a neutral position switch 75. The neutral position switch 75 is connected to the speed change lever 32.
Switch cam 7 of lever arm 67 rotated by
6 is turned on and off. Neutral position switch 75
Is a limit switch and is attached to the bracket 65. When the shift lever 32 is turned to substantially the center of the neutral N region by turning, the neutral position switch 75 is turned off, and the transmission motor is driven by the control circuit by the control circuit.
It is driven to turn off. When the shift lever 32 is rotated to the forward rotation F side or the reverse rotation R side of the neutral N region, the continuously variable transmission belt 13 is transmitted via the return spring 33 via a transmission mechanism 61 such as an interlocking arm 34 or the like. The neutral position switch 75 is turned on, the traveling clutch 40 is engaged, and the input shaft 1 and the continuously variable transmission belt 13 are rotated until the gearshift operation is performed. In this manner, in a region where the speed change lever 32 can move freely due to the return spring 33, the traveling clutch 40 is actuated and the stepless speed change belt 13 is driven.
When 2 is shifted, the shift rotation diameter is changed smoothly. 9 and 10, the point different from the upper side is that the idle interval is set in the return spring 33 between the lever arm 67 and the interlocking arm 34 so that the neutral lever N of the shift lever 32 can be set. Increase the area. The return spring 33 has a lever arm 67.
The pin 73 of the interlocking arm 34 and the pin 72 of the interlocking arm 34 are elastically interlocked with each other so that the shift operation is interlocked.
An appropriate floating interval is set between the third spring 3 and the return spring 33. Reference numeral 77 denotes a stopper plate, and reference numeral 78 denotes a regulating groove formed in the lever arm 67. The stopper plate 77 is formed in the regulating groove 7 so as to regulate the rotation region of the transmission lever 32.
Looking into 8. In FIG. 11, the difference from the upper side is that the speed change lever 32 is fixed to the frame 64 at the neutral position N and the interlocking arm 34 is rotatable. This lever arm 67 is attached to the center of the lever shaft 66 of the lever arm 67.
A pin hole 79 in a direction orthogonal to the axis 66, and the pin hole 7
And a pin 80 fitted movably along 9. 8
Reference numeral 1 denotes a stopper for regulating the movement limit of the pin 80. A ball holder 82 is provided on the frame 64 to face both ends of the pin hole 79, and a ball holder 82 is provided on the interlocking arm 34 side.
A clip holder 9 provided with springs 91 and 92 fitted to the ball holders 82 and 90, respectively.
The clip balls 93 and 9 are pushed by springs 91 and 92 when the pin holes 79 and the ball holders 82 and 90 are aligned.
4 is fitted into the pin hole 79 to provide resistance to the turning operation of the lever arm 67. The ball holders 82 are provided at both ends of the pin hole 79.
When the clip balls 93 and 94 are fitted together at both ends of the pin 80, the spring 91
With the setting being stronger than that, the pin 80 is pushed toward the clip ball 94 side, and the locking function by the ball 94 is released. Therefore, during normal work, the shift lever 32
Is located at a position other than the neutral position N, there is a sense of unity between the shift lever 32 and the interlocking arm 34 due to the engagement by the clip ball 94, and a good operation feeling is maintained. or,
When the shift lever 32 is returned to the neutral position N, the ball 93 is engaged and fixed to the frame 64 side. At this time, the engagement of the interlocking arm 34 by the bow 94 is suppressed.
Even if the shift lever 32 is operated while the engine E is stopped, the interlock arm 34 or the shift interlock mechanism 61 is not forcibly operated. 12 and 13, the difference from the above example is that the lever arm 67 of the speed change lever 32 and the speed change interlocking arm 34 are locked by a lock device 95 so as to be integrally interlocked. By pressing the lock, the lock of the lock device 95 can be released. The lock device 95 includes an engaging portion 97 formed on the outer edge of the lever arm 67, a hook 98 pressed by the spring in the interlocking arm 34 toward the engaging portion 97, and detaches the hook 98 from the engaging portion 97. 99 that operates in the same manner, and this solenoid 99
And a switch 96 for activating the switch.
Reference numeral 6 is provided on a grip portion of the shift lever 32. If the engine E stops when the shift lever 32 is at a position other than the neutral position N, the switch 9
By pushing 6, the lock of the hook 98 can be released by the solenoid 99. 12 and 13, when the engine E is rotating, the lever arm 67 of the speed change lever 32 and the interlocking arm 34 are integrally rotated. When the rotation of the engine E is stopped, regardless of the interlocking arm 34, The lock may be released so that the shift lever 32 can be freely moved. For this reason, when the key switch of the engine E is turned on, the solenoid 99 is energized and the hook 98 is engaged with the engaging portion 97 to be in the locked state, and the transmission lever 32
And the interlocking arm 34 are integrated, and the key switch is turned off.
F, on the contrary, this lock is released and the shift lever 32
Can be freely operated independently of the interlocking arm 34. 14 and 15, the point different from the above example is that the lever arm 67 of the speed change lever 32 is provided with a clip
When the interlocking arm 34 is overloaded, the shift lever 32 can rotate against the spring 100 pressure of the clip claw 101 when the interlocking arm 34 is overloaded. In FIG. 16, the difference from the above example is that in the combine, the power take-off pulley 18, which can turn on and off the power of a working device such as a reaper, is connected to the input shaft 8 of the reaper.
A clutch switch M is provided on a cutting clutch lever 83 for turning on and off the cutting clutch for transmitting the clutch 7, and a clutch motor M for turning on and off the traveling clutch 40 by the limit switch 84 and the neutral position switch 75 by the shift lever 32. The push cylinder 85 for operating the shifter arm 25 of the clutch 5 is controlled. That is, during the mowing operation, the clutch motor M is electrically operated by the limit switch 84 and the neutral position switch 75 when the mowing clutch is engaged and the shift lever 32 is at the neutral N position, so that the traveling clutch 40 is disengaged from the engaged state. Activate to stop running. Also, when the vehicle is merely running, the reaping clutch lever 83 is in the reaping clutch disengagement state, and the left and right steering clutches 5 are disengaged by the neutral position switch 75 only by operating the shift lever 32 at the neutral N position. The system is configured to stop running by making the vehicle effective, so that the vehicle can be stopped safely on a slope or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a transmission lever unit. FIG. 2 is an exploded perspective view thereof. FIG. 3 is a front view of a mission case. FIG. 4 is a side view thereof. FIG. 5 is a front view of a belt continuously variable transmission mechanism. FIG. 6 is a side view of the combine. FIG. 7 is a plan view thereof. FIG. 8 is a front view of a part thereof. FIG. 9 is a side view showing a partly different embodiment of a transmission lever portion. FIG. 10 is a front view thereof. FIG. 11 is a side view showing a partly different embodiment of a transmission lever unit. FIG. 12 is a side view showing a partly different embodiment of the transmission lever unit. FIG. 13 is a plan view thereof. FIG. 14 is a side view showing a partly different embodiment of the shift lever portion. FIG. 15 is a plan view thereof. FIG. 16 is a side view showing a partly different embodiment of the transmission lever unit. [Description of symbols] 1 Input shaft 1 second planetary gear mechanism 3 sun gear 4 speed change shaft 7 running shaft 9 driven gear 10 ring gear 11 Waripu - Li 12 Waripu - Li 13 stepless belt 14 carrier 17 flops - Li 20 planetary gear 21 shaft 22 gear 26 wheel gear 27 A - arm 28 A - arm 29 rod 30 rod 32 shift lever 33 return spring 34 interlocking arm 35 the rod 37 a cam 38 cam 39 the belt 40 running clutch 60 lever brake 61 shift interlock mechanism 75 Neutral position switch A Planetary transmission system B Continuously variable speed belt transmission system E Engine N Neutral F Forward rotation R Reverse rotation

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-92438 (JP, A) JP-A-54-35922 (JP, A) JP-A-1-94036 (JP, A) 71847 (JP, U) Fully open 48-31102 (JP, U) Fully open 56-124564 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60K 20/00-20 / 08 F16H 59/00-59/12 F16H 61/26-61/36 F16H 63/00-63/38 B60K 41/22

Claims (1)

(57) [Claims 1] Running from the engine E side with respect to the input shaft 1.
Pulley 1 driven by belt 39 via row clutch 40
7 and the drive gear 9 and the split pulley 11 are integrally provided.
And the sun gear 3 and the split pulley 12 with respect to the transmission shaft 4.
A ring provided integrally and meshing with the drive gear 9
The gear 10, the inner periphery of the ring gear 10, and the sun gear 3
The carrier 14 has a shaft 21 of a planetary gear 20 meshing with the carrier 14.
And a transmission gear 22 that rotates integrally with the transmission gear 22 are provided rotatably.
Split puller 11 provided on input shaft 1 and split pulley provided on transmission shaft 4
- wound around a continuously variable belt 13 to the re 12, output rotation obtained by the continuously variable belt transmission system B through the planetary transmission system A and the stepless belt 13 through the planetary gear mechanism 2
From the transmission gear 22 via the left and right wheel gears 26
It is configured to travel by transmitting to the right traveling shaft 7, and
In order to make the speed belt transmission system B operable for shifting,
Split puller 11 provided on force shaft 1 and split pulley provided on transmission shaft 4
Of the cams 37 and 38 having the arms 27 and 28
Actuated to move in each axis 1 and 4 direction to adjust pulley diameter
The arm 2 can be changed between the two arms 27 and 28.
9 to connect one of the two arms 27 and 28
Arm 28 via the rods 30 and 35
Connected to 4, the interlocking A - arm 34 and lever - the key 60 - blurring
Thus between <br/> the shift lever -3 2 capable frictional holding the shift operating position, interlocking A constant position relative to the shift lever -32 -
It provided the return spring 33 returns the arm 34, the speed-change lever -32
The pulling diameters of the split pulleys 11 and 12 are
The sun gear 3 is changed to the ring gear 10 having a constant rotation.
Only by changing the rotation speed of the transmission gear 22
The rotation of the left and right wheel shafts 26 and the traveling shaft 7 transmitted from the
Able to shift from neutral N to forward F range and reverse R range
And the return spring 33 of the speed change lever 32
The neutral position switch 75 which turns on and off the driving clutch 40 by the operation from the neutral N position area that can be floating is provided, the speed-change lever -32 forward F of the neutral N position in the region
When the rotation operation is performed to the rotation side or the reverse rotation R side, the return spring 33 is
Through which the continuously variable transmission B is shifted
In the meantime, the neutral position switch 75 is
The input shaft 1 and the continuously variable bell
The drive 13 is configured to be driven.
Transmission operating device for power transmission.