JP3613169B2 - Travel gear - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention is relating combine, tractor, seedling planting machine, the traveling transmission apparatus such as trucks.
[0002]
[Prior art]
In a traveling operation such as a combine, a hydraulic continuously variable transmission is used to facilitate shifting operation and forward / reverse operation, and this control shaft is operated to shift from a neutral position to a forward position or reverse position with a single shift lever. It was .
[0003]
[Problems to be solved by the invention]
However, in such a conventional technique, the hydraulic continuously variable transmission has a drawback that it is heavy and the transmission horsepower loss is large although the speed change operation is easy.
[0004]
In addition, it is known that a continuously variable transmission is configured by winding two split pulleys and a belt between the input shaft and the transmission shaft, but such a mechanism generates friction between the belt and the pulley, There was a problem that the temperature of the belt or the like was likely to rise due to the frictional heat.
[0005]
[Means for Solving the Problems]
The present invention has been proposed in order to solve the above-mentioned problems, and the following technical means have been taken.
[0006]
That is, the pulley 17 and the power take-out pulley 18 that are transmitted from the engine E side to the belt 39 are provided at the outer end of the input shaft 1, and the drive gear 9 is provided in the gear case 19 of the input shaft 1. A split pulley 11 is provided in an inner portion of the belt case 16 of the input shaft 1, a ring gear 10 that rotates in mesh with the drive gear 9 with respect to the transmission shaft 4, and an inner side of the ring gear 10. The carrier 14 of the planetary gear 20 to be engaged and the transmission gear 22 that rotates integrally with the carrier 14 and the shaft 21 of the planetary gear 20 are rotatably mounted, and the sun gear 3 rotates integrally with the transmission shaft 4. The split pulley 12 is provided in the belt case 16 of the transmission shaft 4 so that the split pulley 11 provided on the input shaft 1 and the split pulley 12 provided on the transmission shaft 4 are not provided. The split belt provided on the input shaft 1 is wound around the step transmission belt 13. Fin-like air cooling fans 64 and 64 are formed on the side surface of the belt 11 and the side surface of the split pulley 12 provided on the transmission shaft 4, and wind is generated in the belt case 16 by the rotation of the pulleys 11 and 12. The belt case 16 is configured to be openable and closable, and an intake port 65 through which cooling air is passed is provided in the belt case 16, and the belt case 16 is provided on the opposite side of the belt case 16 from the intake port 65. An exhaust port 61 for exhausting the air in the exhaust 16 to the outside is provided, and the two split pulleys 11, 1 are positioned so that the center lines of the intake port 65 and the exhaust port 61 are located on substantially the same straight line when viewed from the front. 2 and an inner wall of the belt case 16, an arm 27 having a cam 37 for moving the split pulley 11 provided in the input shaft 1 in the axial direction, and the speed change shaft 4. That allows the split pulley 12 to be moved in the axial direction. The front and rear of the speed change lever 32 are linked to a bell crankshaft 31 pivotally supported through a rod 30 having a universal joint and connected to an arm 28 having 38 by a rod 29. The transmission by the continuously variable transmission belt 13 is changed by changing the split pulley interval in each axial direction between the split pulley 11 provided on the input shaft 1 and the split pulley 12 provided on the transmission shaft 4 by rotating the direction. The transmission shaft 4 is configured to shift the speed of the sun gear 3 by changing the speed of the transmission lever 32 with respect to the ring gear 10 that rotates at a constant speed by driving the input shaft 1. It is assumed that the speed can be changed from N to the forward rotation F high-speed region or the reverse rotation R region, and for the speed change operation of the pulley 17 and the power take-off pulley 18 and the continuously variable transmission belt 13 transmitted from the engine E side. The bell crank 31 by providing a steering stand 47 side Berutoke - has a structure of a traveling transmission equipment, characterized by being configured to allow the opening and closing operation of the scan 16 from the outside.
[0007]
【The invention's effect】
According to the present invention , most of the air sucked from the intake port 65 can flow in a substantially straight line and be discharged from the exhaust port 61, and the inside of the belt case 16 can be efficiently cooled by reducing the air flow resistance. can do. As a result, the temperature rise of the belt due to friction with the pulley can be suppressed, and the shortening of the belt life can be avoided, and the opening / closing operation of the belt case 16 can be easily performed from the outside .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. The combine traveling mission case 8 is split in the left-right axis direction, and receives the input shaft 1 and the transmission shaft 4 at the upper part, and the intermediate shaft 15, the steering clutch shaft 6, and the left and right traveling shafts 7 at the lower part. Bearings. Of these, one end of the input shaft 1 and the transmission shaft 4 is a pulley shaft portion 1B, 4B, and a belt case 16 is provided so as to be openable and closable. The transmission pulleys 11 and 12 are accommodated.
[0009]
The outer end of the input shaft 1 has a pulley 17 that is transmitted from the engine E side to the belt 39, a power take-out pulley 18 that transmits the cutting device to the belt, and the like in the gear case 19. 9 In the belt case 16 of the input shaft 1, a pulley shaft portion 1B is detachably connected by spline fitting to have a split pulley 11. The transmission shaft 4 includes a ring gear 10 that rotates in mesh with the drive gear 9 at a gear case 19, a carrier 14 of a planetary gear 20 that meshes with the inside of the ring gear 10, and the carrier 14 A transmission gear 22 or the like that is integrally rotated via the shaft 21 of the planetary gear 20 is mounted, and a pulley shaft portion 4B that is detachably attached to the belt case 16 by spline fitting to the transmission shaft 4. And a split pulley 12 is provided.
[0010]
The split pulleys 11 and 12 between the pulley shaft portions 1B and 4B have a configuration in which the split pulley interval in each axial direction, that is, the pulley diameter can be changed, and the belt 13 wound around them. The transmission can be shifted. The transmission shaft 4 is shifted by the continuously variable transmission belt 13 and the sun gear 3 rotates integrally. However, the ring gear 10, the carrier 14, the transmission gear 22 and the like are rotatably provided. ing.
[0011]
A ring gear 24 that can rotate on the steering clutch shaft 6 can rotate in conjunction with the gear case 19 via an intermediate gear 23 on the intermediate shaft 15 that meshes with the transmission gear 22. The steering clutch 5 is turned on and off by the shifter arm 25 on both the left and right sides of the ring gear 24, and the left and right traveling shafts 7 are transmitted via the wheel gear 26 that meshes with the gear portion of the steering clutch 5. is there.
[0012]
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 link 28 is interlocked with a bell crankshaft 31 pivotally supported on the mission case 8 via a rod 30 having a universal joint, and a return spring 33 is obtained by rotating the shift lever 32 in the front-rear direction. A continuously variable speed change operation is possible via the interlocking arm 34, the rod 35, and the like. Reference numerals 62 and 63 denote cam rollers which are rotatable at fixed positions where the cams 37 and 38 are slid.
[0013]
The traveling transmission is performed by changing the rotational speed of the sun gear 3 with respect to the ring gear 10 of constant rotation while shifting the pulleys 11 and 12 by the speed change lever 32 by driving the input shaft 1 and starting from the neutral N. Although it is possible to shift to the forward F high speed region and reversely to the reverse R region, when the reverse drive or engine brake is applied from the traveling shaft 7 side like a downhill, the steering clutch 5 is engaged. In this state, since the transmission gear 22 and the carrier 14 of the planetary gear mechanism 2 are driven in reverse from the traveling shaft 7 side, even if the planetary gear 20 is about to revolve on the carrier 14, the input shaft 1 and the continuously variable transmission belt 13. Since the ring gear 10 and the sun gear 3 that are not idled via the transmission shaft 4 and the like are engaged and the revolution is restricted, the internal braking is performed and the reverse drive is braked. In particular, when the tension clutch pulley 40 to the input pulley 17 by the belt 39 is cut and the input shaft 1 is not driven, the continuously variable transmission belt 13 is not rotated. No drive is performed even if the drive is reversed.
[0014]
A partition wall 36 partitions the gear case 19 and the belt case 16 and supports the input shaft 1 and the transmission shaft 4. The air cooling fan 64 is integrally formed on the side surface of the pulley 11 of the pulley shaft 1 </ b> B, the side surface of the pulley 12 of the pulley shaft 4 </ b> B, and the like, and winds in the belt case 16 by the rotation of the pulleys 11 and 12. Yes. In order to pass cooling air through the belt case 16, an intake port 65 is provided in the belt case 16. An exhaust port 61 for discharging the air in the belt case 16 to the outside is provided on the opposite side of the belt case 16 from the intake port 65. As shown in FIG. 1, the inlet port 65 and the exhaust port 61 have the center line of each port on substantially the same straight line, and form a ventilation path between the two split pulleys 11, 12 and the inner wall of the belt case 16. ing.
[0015]
Due to the continuously variable transmission belt transmission, the outside air passes through the belt case 16 by the rotation of the air cooling fan 64, so that the mission case 8 can be air cooled.
[0016]
An example of a combine having such a travel transmission device will be described. A crawler 44 is bridged by a sprocket 41 driven by the pair of left and right traveling shafts 7, an intermediate roller 42, and an end roller 43. The transmission case 8 is provided in the front part of a chassis 45 having a pair of left and right crawlers 44, and is transmitted from an engine E mounted below the side cockpit 46 by a belt 39 and a tension clutch pulley 40. sell. A shift lever 32 for shifting the continuously variable transmission belt 13 is provided on a control stand 47 on the side of the cockpit 46, and is rotated in the front-rear direction to move from the neutral position to the forward forward F position. A continuously variable transmission can be performed at a high speed in the forward direction, and a continuously variable transmission can be performed at a high speed in the reverse direction as the reverse reverse R position is operated. Further, the control stand 47 is provided with a power telebar 48, and the steering clutch 5 and the shift arm 25 of the steering brake are operated by the right and left inclination of the power telebar 48, and the cutting device is operated by the front and rear inclination. 49 is configured to be able to move up and down.
[0017]
The cutting device 49 includes a cutting blade device 51, a culm pulling device 52, a culm picking device 53, a transporting device 54 for conveying the chopped cereal, and the like. A support shaft 55 at the rear end is fitted to a cutting support metal 56 on the mission case 8 so as to be rotatable up and down, and a hydraulic cylinder 60 provided between the chassis 45 and the cutting frame 50 is used. The reaping device 49 is controlled to be lifted and lowered.
[0018]
A threshing device 58 is mounted at the rear part of the chassis 45 to hold the cereal cocoon conveyed by the conveying device 54 between the feed chain 57 and the cocoon and transfer the cereal while moving backward. For transmission by the belt 39 from the engine E to the input pulley 17, the planetary gear mechanism 2 is provided on the second speed change shaft 4 next to the input shaft 1. The diameter of the reel 17 can be reduced, and the mission case can be made compact so that the left and right crawlers 44 can be moved closer to the inside.
[0019]
The input shaft to the reaping device 49 is at the support shaft 55, and the belt is transmitted between the pulley 59 fixed to the cockpit 46 and the power take-out pulley 18 of the input shaft 1. . Since such pulleys 59 and 18, the input pulley 17 from the engine E, the bell crankshaft 31 for shifting operation of the continuously variable transmission belt 13, and the like are provided on the control console 47 side, The opening / closing operation from the outside of the belt case 16 of the mission case 8 is easy.
[Brief description of the drawings]
FIG. 1 is a front view of a mission case.
FIG. 2 is a partial side view thereof.
FIG. 3 is a front view of a belt continuously variable transmission mechanism.
FIG. 4 is a side view of a combine.
FIG. 5 is a plan view thereof.
FIG. 6 is a partial front view.
[Explanation of symbols]
1 Input shaft
3 sun gear
4- speed shaft 8 mission case
9 drive gear
10 ring gear
11 Waripu - Li
Twelve percent pulley
13 continuously variable transmission belt
14 carriers 4
16 belt case
17 pulley
18 Power take-out pulley
19 gear case
20 planetary gears
21 axes
22 gears
27 arm
28 arm
29 rods
30 rods
31 bell crankshaft 32 shift lever
37 cams
38 cams
39 belts
47 cockpit
61 exhaust port 64 air cooling fan
65 Air intake F Forward rotation N Neutral R Reverse rotation E Engine

Claims (1)

A pulley 17 and a power take-out pulley 18 that are transmitted from the engine E side to the belt 39 are provided on the outer end of the input shaft 1, and a drive gear 9 is provided in an inner portion of the gear case 19 of the input shaft 1. A split pulley 11 is provided in an inner portion of the belt case 16 of the input shaft 1, and a ring gear 10 that rotates in mesh with the drive gear 9 with respect to the transmission shaft 4 and meshes with the inside of the ring gear 10. The carrier 14 of the planetary gear 20 and the transmission gear 22 that rotates integrally with the carrier 14 and the shaft 21 of the planetary gear 20 are rotatably mounted, and the sun gear 3 rotates integrally with the transmission shaft 4. In the belt case 16 of the transmission shaft 4, a split pulley 12 is provided, and a continuously variable transmission is performed between the split pulley 11 provided on the input shaft 1 and the split pulley 12 provided on the transmission shaft 4. A belt pulley 11 provided around the input shaft 1 by winding a belt 13 thereon. Fin-like air-cooling fans 64 and 64 are formed on the side surface and the side surface of the split pulley 12 provided on the transmission shaft 4 so that the wind is generated in the belt case 16 by the rotation of both the pulleys 11 and 12. The belt case 16 is configured to be openable and closable, and an intake port 65 through which cooling air is passed is provided in the belt case 16. an exhaust port 61 for discharging the air inside out is provided, and the intake port 65 and the two split pulleys 11,1 2 is positioned in substantially the same straight line look at each center line from the front of the exhaust port 61 An air passage is formed between the inner wall of the belt case 16 and an arm 27 having a cam 37 for moving the split pulley 11 provided on the input shaft 1 in the axial direction, and provided on the transmission shaft 4. Cam 38 for axial movement of split pulley 12 The shift lever 32 is rotated in the front-rear direction in conjunction with a bell crankshaft 31 pivotally supported via a rod 30 having a universal joint. The transmission of the continuously variable transmission belt 13 is changed by changing the split pulley interval in each axial direction between the split pulley 11 provided on the input shaft 1 and the split pulley 12 provided on the transmission shaft 4 by movement. The speed change shaft 4 is configured to change the speed, and the rotational speed of the sun gear 3 is changed by the speed change operation of the speed change lever 32 with respect to the ring gear 10 that rotates at a constant speed by the drive of the input shaft 1. A bell for shifting operation of the pulley 17, the power take-out pulley 18, and the continuously variable transmission belt 13 transmitted from the engine E side to the belt 39 from the engine E side. Crankshaft 31 Berutoke by providing a steering stand 47 side - traveling transmission equipment, characterized by being configured to allow the opening and closing operation of the scan 16 from the outside.

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