JPH0322352B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a work vehicle such as a combine harvester having a super pivot turning device, and more particularly to an automatic deceleration device during a super pivot turning.

In general, when making a super pivot turn, the turn is more rapid than when making a pivot pivot turn, so if the turn is made at high speed, there is a risk that the operator will be thrown off or the aircraft will fall sideways, and if the aircraft is traveling straight Or, since a larger force is required than when making a pivot turn, the drive sprocket shaft or gear may be damaged. In addition, for wet field work that particularly requires super-turning,
The work did not go smoothly like the work in Inuda,
Although various difficulties are involved, performing a separate deceleration operation during the difficult super-turning operation makes the operation very complicated and requires a high degree of skill.

Therefore, the present invention is configured such that the operating device of the super pivot swivel device and the operating device of the continuously variable transmission are linked so that when the super pivot swivel device is operated, the continuously variable transmission decelerates. It is an object of the present invention to provide a super-swinging device which eliminates the above-mentioned drawbacks.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the combine 1 has a body 3 supported by crawlers 2, and the body 3 is provided with an automatic thresher, a driver's seat 5, and the like. As shown in FIG. 2, the power from the engine is transmitted to the left and right drive sprocket shafts 9, 9' via the traveling drive device 7, and further to the crawler 2.
has been communicated to. The traveling drive device 7 has a transmission case 10, which includes an input shaft 11, an idler shaft 12, an intermediate shaft 13, left and right steering shafts 14, 14', and a super-turning device 15 for reverse rotation. A shaft 16 and an idler shaft 17 are rotatably supported. A change gear 19 operated by a shifter is slidably supported on the input shaft 11, and the gear 19 is connected to a gear 2 of two forward speeds.
The intermediate shaft 13 can transmit a desired rotation by selectively meshing with the 0, 21 or back gear 22. Furthermore, a gear 23 is wedged on the intermediate shaft 13.
is constantly engaged with a center gear 25 which is freely rotated between the left and right steering shafts 14, 14'. Also,
Brake devices 26, 26' are connected to the left and right steering shafts 14, 14' at their respective ends, and left and right side clutch gears 27, 2 are connected to the left and right steering shafts 14, 14', respectively.
7' is slidably supported, and these gears 2
Gears 30, 7, 27' are biased by a spring 29 so as to mesh with the center gear 25, and are wedged on the drive sprocket shafts 9, 9'.
30' is always engaged. And the reversal shaft 16
A gear 31 is wedged to the idling gear 3.
2 is rotatably supported, and furthermore, a super pivot clutch 33 is supported so as to be slidable only, and the gear 3
1 is always in mesh with one shaft gear 30'. Further, a wide gear 34 is supported on the idler shaft 17, and the gear 34 is always meshed with the free rotation gear 32 and always meshed with the other shaft gear 30.

On the other hand, as shown in FIGS. 3 to 5, left and right steering levers 36, 36' are arranged on the operation panel 35 in the driver's seat 5, and these levers are arranged in vertical grooves 35a formed in the panel 35. ,35'a
and a horizontal groove 3 projecting outward in the middle of the vertical groove.
It is guided by a guide groove formed by 5b and 35b'. Also, the levers 36, 36' are connected to pins 37, 3
It is connected to support shafts 39, 39' by means 7' for horizontal rotation, and wires 40, 40' are connected to the support shafts 39, 39'. wire 40,
As shown in FIG. 5, the other ends of the wires 40' are connected to clutch arms 41 and 41' that operate the left and right side clutch gears 27 and 27', and a predetermined play is provided at the other ends of these wires, respectively. Brake arms 42, 42' for operating left and right brake devices 26, 26' are connected to each other. Further, wires 43 and 43' are connected to the intermediate portions of the levers 36 and 36', respectively, and these wires are connected to arms 46 and 46' fixed to a shaft 45.
is connected to. Furthermore, the shaft 45 is linked to a wire 47 via an arm, and the wire 47
is the shifter 4 that operates the super pivot turning clutch 32.
It is connected to an arm 49 that is connected to 9a.
Therefore, when either the left or right lever is guided into the lateral groove 35b and moved laterally, the arm 49 is operated via the wire 43, arm 46, shaft 45 and wire 47, and the clutch 33 is connected. Note that a spring 50 is tensioned on the arm 49 and biases the clutch 33 in the direction of disengaging from the idling gear 32. Limit switches 51, 51' are installed in the horizontal grooves 35b, 35'b of the panel 35, respectively. Turns on when making a super turn.

On the other hand, as shown in FIGS. 6 and 7, the rotation of the engine 52 is transmitted to the traveling drive device 7 described above via the continuously variable transmission 53. Continuously variable transmission 53
The input side speed change pulley 56 is operated by a hydraulic cylinder 55, and the output side speed change pulley 57 is biased by a spring.The hydraulic cylinders 55 are arranged on both sides of the speed change lever 60, which is biased to a neutral position by a spring 59. The speed increasing limit switch 61 and the decelerating limit switch 62 are operated by electromagnetic valves based on the speed increasing limit switch 61 and decelerating limit switch 62. That is, when the shift lever 60 is tilted in the direction of speed increase, the switch 61 is turned on, extending the hydraulic cylinder 55 and operating the shift pulley 56 in the high speed direction, and when the lever 60 is tilted in the direction of deceleration, the switch 62 is turned on. to operate the speed change pulley 56 in the low speed direction.

Limit switches 51 and 51' are operated by the steering levers 36 and 36', and a limit switch 6 is operated by the gear shift lever 60.
1 and 62 are connected as shown in FIG. In addition, 63a and 63d in the figure are hydraulic cylinders 5.
5 is a speed increasing solenoid and a decelerating side solenoid, respectively, of the electromagnetic valve that operates the solenoid valve 5, and 65 is a main switch.

Since this embodiment has the above-described configuration, the rotation of the engine 52 is transmitted to the input shaft 11 of the travel drive device 7 via the continuously variable transmission device 53, and is further transmitted to the first forward gear 21 and the second forward gear of the change gear 19. Appropriate rotation is transmitted to the intermediate shaft 13 by selective meshing with the step gear 20 or the back gear 22. When the combine 1 travels straight, the intermediate shaft 13 connects the left and right sprocket shafts 9, 9' through the gear 23 → center gear 25 → left and right side clutch gears 27, 27' → shaft gears 30, 30'. The left and right crawlers 2 run at the same speed. At this time, in order to change the speed of the combine harvester 1, the speed change lever 60 is operated to speed up or slow down, and the limit switch 61 is turned on or the solenoid 63a or 63d of the electromagnetic valve is energized. The effective diameter of the input speed change pulley 56 is changed via the input speed change pulley 56, and the speed is continuously changed. When correcting the direction, for example when turning left, pulling the left steering lever 36 a little along the vertical groove 35a operates the shifter via the wire 40 and clutch arm 41, and moves the side clutch gear 27 to the center. Remove it from the gear 25 to cut off power transmission to the left sprocket shaft 9. Further, when making a pivot turn, for example, when turning to the left, the left steering lever 36 is fully pulled along the vertical groove 35a. Then, the side clutch gear 27 is slid and detached from the center gear 25 via the wire 40 and the like, and the wire 40
The play is absorbed and the brake device 26 is actuated via the brake arm 42 to fix the left steering shaft 14. As a result, the side clutch gear 27,
Therefore, the left sprocket shaft 9 is fixed via the gear 30, and the combine 1 pivots to the left.

Further, when making a sharp turn, for example, when turning to the left, the left steering lever 36 is moved along the vertical groove 35a, and further moved laterally along the lateral groove 35b. Then, as described above, the left side clutch 27 is disengaged from the center gear 25, and due to the lateral movement of the lever 36, the shaft 45 is rotated via the wire 43 and the arm 46, and the arm 49 is further rotated via the wire 47. is rotated against the spring 50, and the shifter 49a is operated to engage the super pivot clutch 33 with the idle gear 32. As a result, the rotation of the right shaft gear 30' is transmitted as rotation in the opposite direction to the left shaft gear 30 through the path of gear 31 → clutch 33 → idle gear 32 → wide gear 34 → left shaft gear 30, and the rotation is transmitted to the left shaft gear 30 as rotation in the opposite direction. is reversely rotated with respect to the right sprocket shaft 9', and the combine 1 is rotated completely. Furthermore, at this time, the left steering lever 36 enters the horizontal groove 35a, and the limit switch 5 is activated.
1 turns on. Then, the deceleration solenoid 63d of the electromagnetic valve is energized, the hydraulic cylinder 55 is retracted, and the transfer pulley 56 is operated in the low speed direction. Therefore, when making a super turn, the continuously variable transmission 5 is automatically activated.
3 is shifted to a low speed direction, and the combine 1 runs at a low speed.

In addition, in the above-mentioned embodiment, since deceleration commands are issued continuously during a super turn, the speed may become too slow and efficient work may not be possible, or depending on the operator's skill level, the operator may be unable to turn at a relatively high speed. You may want to do this, but you cannot adjust the deceleration.

Therefore, in the partially modified embodiment shown in FIG.
7 is intervening. Therefore, since the deceleration command is cut off after a predetermined period of time, it is possible to prevent the speed from becoming too slow. Further, since the set time of the timer 67 can be arbitrarily adjusted using the knob 66, an appropriate speed can be set according to the skill level of the operator.

In addition, in the above embodiment, the steering levers 36, 36'
Although the super pivot turning device 15 is actuated by the lateral movement of the steering lever 36, it is of course applicable to an operation position where the steering lever 36 is actuated by an independent lever or switch. 36'
Although the actuating device of the continuously variable transmission 53 is electrically connected by the limit switch 51, the arm 49 and the gear shift lever 60 may be linked via a wire.

As explained above, according to the present invention, the operating devices 36 and 36' of the super pivot turning device 15 and the operating device 55 of the continuously variable transmission 53 are interlocked, and the operating device 55 of the continuously variable transmission 53 is adjustment means 66, which can also set the amount of deceleration of the continuously variable transmission 53;
67 and activates the super pivot turning device 15,
Since the continuously variable transmission 53 is configured to decelerate to the deceleration amount set by the adjustment means 66 and 67,
The turn is carried out smoothly, preventing dangers such as the operator being thrown off due to sudden force or the aircraft falling sideways, and reducing the burden on the drive sprocket shafts 9 and 9'. It is possible to prevent these shafts or gears from being damaged. In addition, the continuously variable transmission 53 does not become too slow when making a corner turn, and when the vehicle returns to straight ahead again, the normal working speed can be quickly returned to improve working efficiency.

In addition, the operator can simply operate the super pivot turning device to automatically decelerate smoothly and without becoming too slow, even when making super pivot turns in wet fields that require extremely troublesome operations. At such speeds, experienced operators can operate efficiently, and unskilled operators can operate it completely and easily.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a combine harvester to which the present invention can be applied, Fig. 2 is an exploded sectional view showing its traveling drive device, Fig. 3 is a perspective view showing its steering operation section, and Fig. 4 is its front view. 5 is a front view showing the outer part of the case of the traveling drive device, FIG. 6 is a side view showing the continuously variable transmission, FIG. 7 is a view showing the gear shift lever, and FIG. 8 is an electric circuit diagram. , FIG. 9 is a partially modified electrical circuit diagram. 1... Work vehicle (combiner), 7... Travel drive device, 15... Super pivot turning device, 36, 36',
43, 43' to 49... operating device, 51, 51'...
...Limit switch, 53...Continuously variable transmission, 5
5,60-62...Operating device.

Claims (1)

[Claims] 1. In a work vehicle equipped with a travel drive device that transmits power via a continuously variable transmission and has a super pivot swivel device, the operating device of the super pivot swivel device and the operating device of the continuously variable transmission are linked. Further, an adjusting means for setting the deceleration amount of the continuously variable transmission is provided, and the continuously variable transmission is configured to decelerate to the deceleration amount set by the adjusting means when the super swing turning device is activated. Shinji swivel device.