JPS5856971A - Very wet ground turning equipment - Google Patents

Abstract

PURPOSE:To prevent danger in turning on very wet ground, by interlocking the operating device of a stepless transmission with a very wet ground turning equipment for a combine or the like which turns on the very wet ground such as a paddy field, so that the transmission performs speed reduction when the turning equipment is put in operation. CONSTITUTION:When a left steering lever 36 is moved along a longitudinal groove 35a and then along a transverse groove 35b for left turning on very wet ground, a left side clutch 27 is disengaged from a center gear 25. At the same time, a shifter 49a is operate through a wire 43 etc. to engage a very wet ground turning clutch 33 with a gear 32. The torque of a gear 30' is transmitted to a left shaft gear 30 through a gear 31, the clutch 33, the idle gear 32 and a large-width gear 34 to rotate the gear 30 in the opposite direction to the gear 30' to reverse a left sprocket shaft 9 as to a right sprocket shaft 9' to turn a combine 1 on the very wet ground. When a limit switch 51 is turned on by putting the left steering lever 36 in the transverse groove 35b, a speed reducing solenoid is energized to retract a cylinder to put a speed change pulley in a low speed position to drive the combine 1 at a low speed.

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, gear, etc. may be damaged. In addition, when working in wet fields that particularly requires turning, it does not go as smoothly as work in dry fields, and it is accompanied by various difficulties. This means that the operation is 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. The object of the present invention is to provide a super-swinging device that eliminates the 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 transmitted to the crawler 2. The traveling drive device 7 has a transmission case 10, and the case 1o includes an entry shaft 11, an idler shaft 12, an intermediate shaft 13, and a left/right steering shaft 1.
4, 14', and furthermore, a reversing shaft 16 and an idler shaft 17 are rotatably supported in the super pivot turning device 15.

A change gear 19 operated by a shifter is slidably supported on the input shaft 11, and the gear 19 selectively meshes with two forward gears 20, 21 or a reverse gear 22. Desired rotation can be transmitted. Further, a gear 23 is wedged on the intermediate shaft 13, and the gear 23 is always meshed with a center gear 25 freely rotating between the left and right steering shafts 14 and 14'. In addition, the left and right steering shaft 14
, 14' each have a brake device 26 at their end.
, 26' are connected to each other, and left and right side gears 27 and 27' are slidably supported, respectively, and these gears 27 and 27' are urged by a spring 29 so as to mesh with the center gear 25. At the same time, the gear 3, which is wedged on the driving sprocket and shaft 9°9',
0 and 30' are always engaged by 1 degree. And the reverse axis 1
A gear 31 is wedged to the shaft 6, and an idler gear 32 is rotatably supported on the shaft 6, and a super swing gear 33 is supported so as to be slidable only. It is constantly meshed with 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, the operation panel 35 in the driver's seat 5 has left and right steering levers 36, 36'.
These levers are provided with vertical grooves 35a, 35'a formed in the panel 35 and a horizontal groove 35b projecting outwardly at the middle of the vertical grooves.

It is guided by a guide groove formed by 35'b. The levers 36, 36' are laterally rotatably connected to support shafts 39, 39' by pins 37, 37', and wires 40, 40' are connected to the support shafts 39, 39'. ing. As shown in FIG. 5, the other ends of the wires 40 and 40' are connected to clutch and cheer arms 41 and 41' that operate the left and right side clutch gears 27 and 27'. Brake arms 42 and 42' are connected, each having a predetermined play and operating the left and right brake devices 26 and 26'. In addition, wires 43 are provided in the intermediate portions of the levers 36 and 36', respectively.
, 43' are connected, and these wires are connected to the shaft 45.
It is connected to an arm 46°46' fixed to. Further, the shaft 45 is connected to a wire 47 via an arm, and the wire 47 is connected to an arm 49 that is connected to a shifter 49a that operates the super-swing clutch 32. Therefore, move either the left or right lever to the horizontal groove 35b.
When the arm 49 is guided and moved laterally, the arm 49 is operated via the wire 43, the arm 46, the shaft 45, and the 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. Lateral grooves 35b, 3 in the nomonel 35
Limit switches 51 and 51 are installed at the 5'b portions, respectively.
' are installed and which switch levers 36, 3
It is turned on at the approach position to the horizontal grooves 35m and 35'a of 6', that is, when making a super turn.

On the other hand, as shown in FIGS. 6 and 7, the rotation of the engine (5) is transmitted to the traveling drive device 7 described above via the continuously variable transmission device 53. The continuously variable transmission 53 includes an input speed change pulley 56 that is operated by a hydraulic cylinder 55 and an output speed change pulley 57 that is biased by a spring, and the hydraulic cylinder 55 is biased to a neutral position by a spring 59. It is operated by electromagnetic valves based on the speed increase limit switch 1 and the deceleration limit switch 2 disposed on both sides of the speed change lever 60. That is, when the shift lever 60 is tilted in the direction of speed increase, the switch 62 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. is turned on and the speed change pulley 56 is operated in the low speed direction.

Limit switches 51 and 51' operated by the steering levers 36 and 36' and a speed change lever 60
The limit switch 61962 operated by the eighth
The wires are connected as shown in the figure. In addition, 63a in the figure,
63d is a speed increasing solenoid (6) and a decelerating side solenoid of a solenoid valve that operates the hydraulic cylinder 55, and 65 is a main switch.

Since this embodiment has the above configuration, the engine 5
The rotation of No. 2 is transmitted to the input shaft 11 of the travel drive device 7 via the continuously variable transmission 53, and further the rotation of No. 2 is transmitted to the input shaft 11 of the travel drive device 7 through the continuously variable transmission 53,
Appropriate rotation is transmitted to the intermediate shaft 13 by selective meshing with the stepped gear 21, the forward two-step gear 20, or the back gear 22. When the combine 1 travels straight, the left and right sprocket shafts 9, 9' follow the path: intermediate shaft 13/J gear 23 → center gear 25 → left and right side clutch gears 27, 27' → shaft gears 30, 30'. is driven, and the left and right crawlers 2 travel at the same speed. At this time, to change the speed of Konno (in 1), operate the speed change lever 60 to increase or decelerate.
2 and turn on the solenoid 63 & or 63d of the solenoid valve.
is excited, thereby changing the effective diameter of the input-side speed change pulley 56 via the hydraulic cylinder 55, resulting in stepless speed change. In addition, when correcting the direction, for example, when turning to the left, pulling the left steering lever 36 a little along the vertical m 35 a operates the shifter via the wire 40 and clutch arm 41, and the side clutch gear 27 is activated. Remove it from the center gear 25 to cut off power transmission to the right 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 removed from the center gear 26 via the wire 40, etc., and the play in the wire 40 is further absorbed, and the brake device 26 is actuated via the brake arm 42, and the left steering shaft is 14 is fixed. As a result, the right sprocket shaft 9 is fixed via the side clutch gear 27 and therefore 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 35m, 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 to the left shaft gear 30 as rotation in the opposite direction through the path of gear 31 → clutch 33-f idle gear 32 → wide gear 34 → left shaft gear 30, and the right The sprocket shaft 9 is rotated in the opposite direction with respect to the right sprocket shaft 9', and the combine 1 is rotated in a straight rotation. Furthermore, at this time, the left steering lever 3
6 enters the horizontal groove 351, Rimi, Tosui, Chi 51
turns on. Then, the deceleration solenoid 6 of the electromagnetic valve
3d is excited, retracts the hydraulic cylinder 55, and operates the speed change pulley 56 in the low speed direction. Therefore, during a super turn, the continuously variable transmission 53 is automatically shifted to a low speed direction.
Combine 1 runs at low speed.

In addition, in the above-mentioned embodiment, since deceleration commands are issued continuously during a super turn, the speed may be too slow, making it impossible to work efficiently, or depending on the skill level of the operator (9). , you may want to turn at a relatively high speed, but you cannot adjust the deceleration.

Therefore, in the partially modified embodiment shown in FIG. 9, a timer 67 whose set time can be adjusted with a knob 66 is provided. Therefore, since the deceleration command is applied for a predetermined period of time, it is possible to prevent the speed from becoming too slow. Furthermore, timer 6
The setting time of 7 can be adjusted as desired using the knob 66.
Appropriate speed can be set according to the skill level of the operator.

In the above-mentioned embodiment, the super pivot turning device 15 is actuated by the lateral movement of the steering levers 36 and 36', but it goes without saying that the present invention can also be applied to an operating device that is actuated by an independent lever or switch. In the above-mentioned embodiment, the steering levers 36, 36' and the operating device of the continuously variable transmission 53 are electrically connected by the rim, tosui, and te 51, but the arm 49 and the gear shift lever 60 are connected via wire. may be linked.

As explained above, according to the present invention, the operating devices 36, 36', 43, 43' to 49 of the super pivot turning device 15 and the operating devices 55, 60 (10) to 62 of the continuously variable transmission 53, 51, 51'L/, the continuously variable transmission is configured to decelerate when the super pivot turning device is activated, so the speed will be reduced during a super pivot turn, and the operator will not be thrown off or the aircraft will be In addition to preventing dangers such as falling over,
The load on the drive sprocket shaft 999' can be reduced and damage to these shafts or gears can be prevented. In addition, the operator can decelerate automatically by simply operating the super pivot turning device, so even an inexperienced operator can easily decelerate even though super pivot turning in wet fields requires extremely troublesome operations. can be operated on.

[Brief explanation of the drawing]

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 the traveling drive device, Fig. 3 is a perspective view showing the steering operation section, Fig. 4 is a front sectional view thereof, and Fig. 5 shows the outer part of the case of the traveling drive device. Front view,
FIG. 6 is a side view of the continuously variable transmission, FIG. 7 is a diagram showing its gear change lever, FIG. 8 is an electric circuit diagram, and FIG. 9 is a partially modified electric circuit diagram. 1...Work vehicle (combiner), 7...Traveling drive device, 15...Super pivot turning device, 36.36
', 43, 43' to 49... operating device, 51, 5
1'... Limit switch, 53... Continuously variable transmission, 55, 60-62... Operating device Applicant Mitsubishi Agricultural Machinery Co., Ltd. Figure 3 Figure 4

Claims (1)

[Claims] (1) In a work vehicle that is 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 connected to each other. The super pivot swivel device is configured so that the continuously variable transmission decelerates when the super pivot swivel device is operated in conjunction with the super pivot swivel device.