JP3582084B2 - Transmission operating device for traveling transmission in combine - Google Patents

Description

[0001]
[Industrial applications]
This invention can be utilized as a traveling transmission apparatus Konbai down. The present invention relates to a traveling transmission device configured by combining a planetary gear mechanism and a continuously variable transmission belt.
[0002]
2. Description of the Related Art
The traveling operation of Konbai down, speed change operation and Riva - to facilitate a scan operation, using a hydraulic stepless transmission, a single shift lever with the control shaft - in the forward position or reverse position from the neutral position Although the shift operation is performed, the stepless hydraulic transmission is heavy and the transmission horsepower loss is large despite the ease of the shift operation.
[0003]
[Means for Solving the Problems]
According to the present invention, the power is transmitted by a planetary gear transmission system A and a continuously variable transmission belt transmission system B driven by the engagement of the main clutch 40, and the output traveling is performed by the continuously variable transmission of the continuously variable transmission belt system B by the transmission lever 32. A power take-off clutch 60 for driving a reaper 49 from an input shaft 1 of a traveling transmission case 2 is provided in a combine having a traveling transmission that continuously varies a speed of a shaft 7 from a neutral N to a forward rotation F and a reverse rotation R; The main clutch 40 is set to the disengaged state when the power take-off clutch 60 is engaged and the shift lever 32 is in the neutral N position, and when the power take-off clutch 60 is disengaged , the motor M is turned off. When the shift lever 32 is in the neutral N position, the main clutch 40 is held in the engaged state by operating the N position. When you cut the main clutch 40 is constructed of a shift operating device of the traveling transmission apparatus in the combine, characterized by being configured to hold a state cut.
[0004]
[Action and effect of the invention]
When the main clutch 40 is engaged, the input shaft 1 is driven and transmitted through the planetary gear transmission system A and the continuously variable transmission belt transmission system B, and the main transmission lever 32 changes the speed of the continuously variable transmission belt transmission system B. By performing the operation, the state where the rotation from the continuously variable transmission belt transmission system B is balanced with respect to the constant rotation of the planetary gear transmission system A is set to the neutral N position where the output shaft 7 is not rotated. When the transmission system B is rotated at a low speed, the rotation of the output traveling shaft 7 is increased to the forward rotation F side, and conversely, when the transmission system B is rotated at a high speed, the rotation of the output traveling shaft 7 is increased to the reverse rotation R side.
[0005]
When the shift lever 32 is operated to the neutral N position while the power take-off clutch 60 for driving the reaper 49 is engaged, the motor M of the main clutch 40 is driven and the main clutch 40 is disengaged. For this reason, even if the neutral N position at which the transmission rotation of the output traveling shaft 7 is stopped by the shift lever 32 is narrow, the operation range of the shift lever 32 and the motor M are driven by the switch thereby to disengage the main clutch 40. Therefore, by cutting the low speed region of the output traveling shaft 7, the substantially neutral N region can be widened. Therefore, in the low speed range of the traveling shaft 7, the useless high-speed transmission state of the reaper 49 driven from the input shaft 1 via the power take-off clutch 60 can be eliminated.
[0006]
That is, when the shift lever 32 is returned to the neutral N position, the running stops and the main clutch 40 is disengaged by the motor M. Therefore , the transmission of the reaper 49 via the power take-off clutch 60 by stopping the input shaft 1 is also performed. Stopped at the same time.
In this manner, by operating the shift lever 32, it is possible to perform a simple operation capable of switching between acceleration and deceleration and shifting from the neutral N position to the forward rotation F side and the reverse rotation R side. In order to disengage the main clutch 40 by the motor M, to stop the rotation of the input shaft 1 and the continuously variable transmission belt transmission system B and to stop the rotation of the output traveling shaft 7, the operation angle of the shift lever 32 and the output traveling The neutral N range with the stop of the rotation of the shaft 7 can be set wide, and the stop of the input shaft 1 stops the driving of the reaper 49 via the power take-off clutch 60 at the same time.
Further, when the power take-out clutch 60 for driving the reaper 49 is disengaged, the main clutch 40 is kept in the engaged state even when the shift lever 32 is operated at the neutral N position. When the power take-off clutch 60 for driving the reaper 49 is disengaged, the vehicle is traveling on the road. When the vehicle is traveling on the road, the main clutch 40 is kept in the engaged state, so that when the shift lever 32 is moved forward or backward. A smooth start is possible with almost no time lag.
Even when the power take-off clutch 60 is disengaged when the shift lever 32 is in the neutral N position, the main clutch 40 maintains the disengaged state.
[0007]
【Example】
The traveling transmission case 2 of the combine has a split shape in the left-right axis direction, in which the upper portion supports the input shaft 1 and the speed change shaft 4, and the lower portion has the intermediate shaft 15, the steering clutch shaft 6, and the left and right traveling shafts 7. Bearing. One end of the input shaft 1 and the transmission shaft 4 is a pulley shaft 1B, 4B, and a belt case 16 is provided so as to be openable and closable. The shift pulleys 11 and 12 are accommodated.
[0008]
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-out pulley 18 for transmitting a belt to a reaper, and the like. 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 gear case 19, a ring gear 10 meshed with the drive gear 9 and rotated, a carrier 14 of a planet gear 20 meshed with the inner periphery of the ring gear 10, and a carrier 14 And a transmission gear 22 and the like, which are integrally rotated via a shaft 21 of the planetary gear 20 and the like, and a pulley shaft portion which is detachably mounted on the belt case 16 by spline fitting with respect to the transmission shaft 4. 4B, a split pulley 12 is provided.
[0009]
The split pulleys 11 and 12 of the pulley shaft portions 1B and 4B have a structure in which the split pulley interval in each axial direction, that is, the pulley diameter can be changed. Transmission 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.
[0010]
A ring gear 24 rotatable on the steering clutch shaft 6 can be interlocked with the gear case 19 via an intermediate gear 23 on the intermediate shaft 15 meshing with the transmission gear 22. 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.
[0011]
To change the speed of the continuously variable transmission belt 12, a rod 29 is connected between arms 27 and 28 having cams 37 and 38 for moving the pulleys 11 and 12 in the axial direction. The gear 28 is interlocked with a bell crankshaft 31 rotatably supported on the transmission case 8 via a rod 30 having a universal joint. This is a configuration in which a stepless speed change operation can be performed via an interlocking arm 34, a rod 35, and the like. Reference numerals 62 and 63 denote cam rollers rotatable at fixed positions for sliding the cams 37 and 38.
[0012]
The traveling transmission is performed by changing the number of rotations of the sun gear 3 with respect to the ring gear 10 having a constant rotation while driving the pulleys 11 and 12 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 is performed from the traveling shaft 7 side or the engine brake is applied like a downhill, the steering clutch 5 is used. 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 Because the sun gear 3 is meshed between the ring gear 10 and the sun gear 3 that do not move through the speed change belt 13 and the speed change shaft 4, internal braking is performed, and reverse driving is braked. Become. In particular, when the main clutch 40 is disengaged by the tension clutch pulley to the input pulley 17 by the belt 39 and the input shaft 1 is not driven, the continuously variable transmission belt 13 is not rotated. Even if the gear 3 side is driven in reverse, no drive transmission is performed.
[0013]
Reference numeral 36 denotes a partition wall for partitioning between the gear case 19 and the belt case 16, and supports the input shaft 1 and the speed change 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 can be transmitted by an engine E mounted below a lateral cockpit 46 by a belt 39 and a main clutch 40 pulley. A speed change lever 32 for shifting the continuously variable transmission belt 13 is provided on a control table 47 beside the cockpit 46, and is operated to rotate 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 64 by tilting the power telescopic lever 48 from side to side. The reaping device 49 is configured to be able to move up and down.
[0014]
A switch cam 65 is provided at the base of the shift lever 32. A switch 66 switched by the switch cam 65 turns on and off the relay switches 67 and 68 of the forward / reverse rotation motor M, so that the shift lever 32 is in the neutral N range. When the shift lever 32 is in the forward rotation F or reverse rotation R range, the motor M is driven to the main clutch 40 engagement side when By operation, the on / off operation of the main clutch 40 for speed change transmission is linked. Reference numerals 69 and 70 denote limit switches for detecting the engagement position of the main clutch 40.
[0015]
The cutting device 49 includes a cutting blade device 51, a grain stalk raising device 52, a grain stalk raking device 53, a transport device 54 for transporting the harvested grain stalk, and the like. The support shaft 55 at the rear end is vertically rotatably fitted to the mowing support metal 56 on the transmission case 8 and a hydraulic cylinder provided between the chassis 45 and the mowing frame 50 allows this. The raising and lowering control of the reaper 49 is performed.
[0016]
A threshing device 58 is mounted at the rear of the undercarriage 45 for threshing the culm conveyed by the conveying device 54 while nipping the culm between the feed chain 57 and the shackling rod and transporting 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 made closer to the inside.
[0017]
The input shaft to the reaper 49 is located at the support shaft 55, and a belt 61 is provided between the pulley 59 fixed to the cockpit 46 and the power take-out pulley 18 of the input shaft 1. Power is transmitted by a power take-off clutch 60 by a tension clutch pulley. 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 and closing operation of the transmission case 8 from the outside of the belt case 16 is easy.
[0018]
Alternatively, the main clutch 40 may be disengaged only when the power take-off clutch 60, which is a mowing clutch, is engaged and the shift lever 32 is at the neutral N position.
In the configuration in which the main clutch 40 is disengaged only when the shift lever 32 is operated to the neutral position, the main clutch 40 is disengaged every time the shift lever 32 is set to the neutral position N. When the speed is changed to F or reverse R, a time lag occurs in which the shift lever 32 is moved but the vehicle does not travel. This time lag is more remarkable when traveling on the road than during mowing. Since the operation of the shift lever 32 during operation is performed gently, there is almost no time lag.
[0019]
In the above configuration, during traveling on the road, the power take-off clutch 60 is disengaged by operating the work clutch lever 71, that is, the work switch 72 is turned off. Since the clutch 40 is not disengaged, no time lag occurs.
In FIG. 9, the difference from the above example is that, in the operation interlocking configuration in which the main clutch 40 is turned on and off by the motor M, the arm 73 for driving the main clutch 40 and the switch cam 74 of the limit switches 69 and 70 for stopping the motor M. And are integrated. Further, the arm 75 of the tension pulley of the main clutch 40 has a turnbuckle 76 and is connected by a rod 77 which is adjustable in expansion and contraction. Reference numeral 78 denotes an adjustment rod for adjusting the pressure of the arm 75 via a spring 79. The motor M transmits the worm shaft 80 and rotates the cam shaft 81 via the worm gear mechanism. The arm 73 integrated with the cam 74 rotates integrally with the cam shaft 81. 82 is a case for mounting and supporting the camshaft 81 and the like, and 83 is its cover. Further, stoppers 84 and 85 for locking the rotating end of the arm 73 are provided on the case 82, and stop the arm 73 when the overrun occurs without the stop control by the limit switches 69 and 70.
[0020]
In this way, by forming the arm 73 and the cam 74 integrally, the backlash can be eliminated and the time lag of the main clutch 40 can be reduced. Further, by connecting the tension clutch 75 and the arm 73 with the rod 77, the time lag can be similarly reduced. Further, when the shift lever 32 is at the neutral position N, even if the tension of the main clutch 40 is constantly applied, the main clutch 40 is received by the rod 77, so that there is no concern about elongation.
[0021]
10 and 11, the difference from the above example is that the operation configuration of the clutch motor M for driving the main clutch 40 is simplified by the mowing switch 72 by the mowing clutch lever 71 and the switch 66 by the shift lever 32. Things. The main clutch 40 is operated under the conditions as shown in FIG. 86 is a thermal protector, which is a safety switch for automatically stopping the motor M when the transmission case 8 reaches a high temperature. 87 is an emergency switch.
[0022]
12 is different from the above example in that the main clutch 40 is automatically cut off by the motor M when the power take-off clutch 60 is engaged and the shift lever 32 is in the neutral state N. The cam 65 has a width in which the vehicle speed is relatively low (for example, 0 to 0.2 m / sec in the case of a combine). In the low speed range width of the switch cam 65, the limit switch 66 is turned off, the main clutch 40 is disengaged, the neutral N range can be widened, and both the traveling section and the working section stop. Since the main clutch 40 is turned on and off in a high-speed range exceeding the speed, the mowing work unit can mower at an appropriate vehicle speed.
[Brief description of the drawings]
FIG. 1 is a front view of a mission case.
FIG. 2 is a side view thereof.
FIG. 3 is a front view of a belt continuously variable transmission mechanism.
FIG. 4 is a side view of the combine.
FIG. 5 is a plan view thereof.
FIG. 6 is a front view of a part thereof.
FIG. 7 is a side view of a transmission lever unit.
FIG. 8 is an electric circuit diagram of a main clutch motor unit.
FIG. 9 is a perspective view showing another embodiment of the main clutch motor.
FIG. 10 is an electric circuit diagram showing a partially different embodiment.
FIG. 11 is an operation table showing the operation conditions.
FIG. 12 is a side view of a transmission lever unit.
[Explanation of symbols]
1 input shaft
2 traveling transmission case 7 traveling shaft 32 shift lever 40 main clutch
49 Cutting device 60 Power take-off clutch A Planetary gear transmission system B Continuously variable speed belt transmission system F Forward rotation M Motor N Neutral R Reverse rotation

Claims (1)

The transmission is transmitted by a planetary gear transmission system A and a continuously variable transmission belt transmission system B driven when the main clutch 40 is engaged, and the output traveling shaft 7 is neutralized by the continuously variable transmission of the continuously variable transmission belt transmission system B by the transmission lever 32. A power take-off clutch 60 for driving the reaping device 49 from the input shaft 1 of the traveling transmission case 2 is provided in a combine having a traveling transmission that continuously changes the speed from N to forward rotation F and reverse rotation R, and the main clutch 40 is disengaged. When the power take-out clutch 60 is engaged and the shift lever 32 is in the neutral N position, the main clutch 40 is set to the disengaged state. When the power take-off clutch 60 is disengaged, the main clutch 40 is operated by the neutral N position operation. The main clutch 40 is configured to hold the engaged state, and the power take-off clutch 60 is turned off when the shift lever 32 is at the neutral N position. The main clutch 40 is shifting apparatus of a traveling transmission apparatus in the combine, characterized by being configured to hold a state cut.

Images