JPH035283A - Operating device for agricultural working vehicle - Google Patents

Abstract

PURPOSE:To changeover a turning method into pivotal turning or ultra pivotal turning without change of the operating method of a steering lever by providing a working tool for pivotal turning and a working tool for ultra pivotal turning of which interlocking is changed over through operation of a turning direction changeover lever, in the operation system of a pair of right and left steering levers. CONSTITUTION:A connecting rod 58 transmitted with operating force of a turning direction changeover lever with which a turning method is changed over into pivotal turning or ultra pivotal turning, is connected to an interlocking shaft 71 journaled on the bracket 70 on a gear box, so as to up and down move cam changeover plates 68 by rotation of the interlocking shaft 71 through an arm 72 and a pin 73. A cam 4 for pivotal turning, a cam 5 for ultra pivotal turning, and cam working tools 67 connected to steering levers 1, 2 are respectively loosely fitted to cam-shafts 65, 66 loosely fitted with the changeover plates 68. By upward movement of the changeover plate 68 with which the cam 5 is contacted to the cam working tool 67 and a roller 62 at the lowermost position, the cam 4 is brought to contact to the cam working tool 67 and the roller 62.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a control device used in agricultural vehicles such as combines and transport vehicles, which stops driving one of the left and right traveling devices and turns the vehicle. This invention relates to a control device that can appropriately change between a pivot turn and a super pivot turn in which left and right traveling devices are rotated in opposite directions to turn on the spot.

(Prior art) A control device for an agricultural vehicle that performs pivot turns and super pivot turns is as follows:
For example, it is described in Japanese Utility Model Application Publication No. 55-161660.

In this configuration, a pivot turning groove and a super pivot turning groove are provided in the guide grooves of the pair of left and right steering levers, and by moving one of the steering levers into either guide groove, the turning method can be adjusted. I am trying to change it to a Shinji turn or a super Shinji turn.

(Problems to be Solved by the Invention) In the above configuration, the operating method of the steering lever is changed depending on whether a Fa pivot turn is to be made or a super pivot turn. Operate the steering lever into the turning groove to make a sharp turn, or conversely, steer with the intention of making a turning turn and operate the bar into the turning groove to make a sharp turn. This can cause the aircraft to move in unexpected ways, which can be dangerous.

Therefore, in the present invention, after operating another turning method switching lever, the turning method is changed without changing the operating method of the steering lever, thereby preventing the occurrence of a dangerous situation due to an erroneous operation.

(Means for Solving the Problem) In a control device for an agricultural work vehicle that can appropriately select between a pivot turning and a super pivot turning, the operating system of the steering lever 1.2 is provided with a turning method switching lever 3. A pivot turning actuator 4 and a super pivot turning actuator 5 whose interlocking is switched are provided, and the turning method can be changed by switching the turning method switching lever 3 without changing the operating method of the steering lever 1.2. It is now possible to change between ground rotation and super high ground rotation.

(Operations and Effects of the Invention) For example, when performing a super pivot turn, by switching the turning method switching lever 6 to the super pivot turning side, the super pivot turning actuating tool 5 is set to the steering levers 1 and 2. On the other hand, when performing a pivot turn, by switching the turning method switching lever 6 to the pivot turning side, the leased ground turning actuator 5 will be linked to the operation of the steering lever 12. Therefore, the method of operating the steering lever 12 remains unchanged.

In this way, when performing a pivot turn or a super pivot turn, by operating the turning method switching lever 3 in advance, the turn can be made without changing the operation of the steering levers 1 and 2. Unlike in the past, there is no need to be careful about how to operate the steering lever during a turn, and there is no danger of the aircraft making an unexpected turn and causing a dangerous situation.

(Example) Next, an example of the present invention will be described with reference to the drawings.

As shown in FIG. 7, the internal structure of the transmission gear box 10 is different from the conventional structure.

A pulley 12 that inputs power from a prime mover (not shown) with a belt is fixed to the protruding shaft end of the input shaft 11 with one end protruding from the gear box 10 . .14 is provided so as to be slidable in the axial direction by spline fitting, and the shift loft 1
Two shifters 16 by rotation and axial sliding of 5
．． One of the shift gears 13, 14 is engaged with the gears 21, 22, 23.24 of the intermediate shaft 18.19 through one of the gears 17, as appropriate, to select forward 1st speed (Fl), forward 2nd speed (F2), or reverse 1st speed. (R1) and reverse 2nd speed (R2). The two intermediate shafts 18 and 19 transmit power through meshing of gears 80 and 1111.

The gear 25 of the intermediate shaft 19 meshes with the central gear 27 fitted onto the side clutch shaft 26 to transmit power, and the side clutch gears 213 and 29 fitted onto the side clutch shaft 26 on both sides of the central gear are connected to the gear case 10. There is a power transmission state in which the wheel gears 32 and 33 fixed to the shaft ends of the output shafts 30 and 31 protrude from the left and right sides and mesh with the central gear 27 by sliding in the axial direction, and a neutral state in which the mesh is disengaged. , are engaged with the outer fixed claws 34 and 35 to stop rotation.

These side clutch gears 28, 29 are always connected to the center gear 29.
The above three states can be switched by rotating the operating shaft 45.46 which is interlocked with the steering lever 5.6. A gear 36 is fixed to one of the output shafts 30, and gears 37 and 38 that sequentially mesh with this gear 36 form a reversing shaft 39.
A gear 40 is fixed to the other output 31, and power is transmitted to the reversing shaft 39 via a gear 41 meshing with this gear 40 and a reversing clutch 42.

The reversing clutch 42 is always held in a clutch-disengaged state, and is brought into a clutch-on state by rotation of the reversing clutch operating shaft 47.

Foil sprockets 43 and 44 are fixed to the protruding end side of the output shaft 30, 31 to engage with a crawler running on the ground.

48 is a brake drum that simultaneously stops the rotation of the left and right output shafts 30°31.

When steering to make a normal turn on leased land, the reversing crunch 42
is turned off so that the rotation of one output shaft 30 and (lh side output shaft 31) is unrelated.・Turn one of the side clutch gears 2B and 29 on and off to turn one of the output shafts 30 and 31. It stops and turns.

When performing a super pivot turn, for example, if only one side clutch 29 is in a neutral state and the reversing clutch 42 is turned on, the rotation of the output shaft 30 is transmitted to the output shaft 31 via the reversing shaft 39. As a result, the output shaft 31 rotates in the opposite direction, resulting in a super pivot turning on the spot.

Next, the side clutch gear 28 in the gear box 10.
29 and the operation system of the reversing clutch 42 will be explained.

First, as shown in FIGS. 5 and 6, in the shift operation section, the shift operation lever 9 is attached to the shift rod 15 with a pin 51.

The intermediate portion of the culm of this speed change operation lever 9 is sandwiched between guide rods 52 and 52, and the upper end side protrudes from the guide plate 53. On the guide plate 53, a low speed guide groove 92 for switching between low speed forward (Fl) and low speed reverse (R1) and a high speed guide groove 93 for switching between high speed forward (F2) and high speed reverse (R2) are connected by a high and low speed guide groove 94. A type guide groove 54 is provided, and the shift rod 15 is rotated along the guide rod 52 of the speed change operation lever 9 to switch between the low speed side and the high speed side.
By sliding the shift rod 15 in the axial direction using the guide rod 52 as a fulcrum, it is possible to switch between forward and reverse travel on the low speed side or high speed side.

Note that the speed change within the low-speed guide groove 92 and the high-speed guide groove 93 is not limited to forward and backward movement, but also allows for two or three forward speeds; however, the speed change within the low-speed guide groove 92 is In order to make a pivot turn, the traveling speed of a passenger type vehicle is 2 km,
It is appropriate for the walking type to have a speed of up to 1.6 km/h.

Near the shift rod 15, a support shaft 55 is rotatably suspended parallel to the shift loft 15.

This support shaft 55 has a high-speed guide groove 93 of the speed change operation lever 9 that abuts a locking pin 56 protruding from the speed change operation lever 9.
A blocking device 8 consisting of an L-shaped bar that prevents inward rotation, a bracket 57 connected to the turning method switching lever 3, and a connecting rod 58 connected to the turning method changing mechanism 60 of the steering lever 1.2 are pivoted. A supporting bracket 59 is provided protrudingly. The bracket 57 is connected to the turning method switching lever 3 by a connecting tool 61 and a wire 50, and when the turning method switching lever 3 is rotated to the super pivot turning side (QT), the blocking device 8 moves to the shift lever 9.
When the stopper 8 engages with the locking portion 56 of the shift operating lever 9 and reaches the position where shifting to the high-speed guide groove 93 is disabled, and rotates to the pivot turning side (NT), the blocking device 8 engages with the locking portion 56 of the gear shift operation lever 9. The gear shift operating lever 9 is located at a position that does not hinder the rotation of the gear shift operating lever 9 into the high speed guide groove 93.

As shown in FIGS. 1 to 4, the turning method changing mechanism 60 of the steering lever 1.2 changes the operation of the side clutch gears 2B, 29 and the reverse clutch 42 to the steering lever 1.2 as appropriate. This is a mechanism that changes and connects them in an interlocking manner.

An arm 84 having a roller 62 pivotally attached to its tip is fixed to the shaft end of the side clutch operating shaft 45, 46 that operates the side clutch gears 2B, 29. By pressing the cam 5, which is an actuating tool for pivot turning, the side clutches 28 and 29 in the gear case IO are operated, and the transmission state, neutral state, and rotation stop state are achieved.

The cam 4 for turning on rented land and the cam 5 for turning on super land are mounted on cam shafts 65.
It is loosely fitted in 66. This camshaft 65,66 includes a cam actuator 67 connected to the steering lever 1.2 and a cam switching plate 6.
8 are loosely fitted together, the compression spring 69 pushes down the pivot turning cam 4 and the super pivot turning cam 5, and at the lowest position, the super pivot turning cam 5 engages the cam actuator 67 and the side clutch. It operates by contacting the roller 62 of the operating shaft 45, 46, and the switching plate 6
8 moves the pivot turning cam 4 to the cam actuating tool 67.
and roller 62 to operate.

The cam actuator 67 is connected to the two steering levers 1 and 2 by wires 75, respectively.

The vertical movement of the switching plate 68 is performed by the above-mentioned turning method switching lever 3.
A connecting rod 58 connected to a supporting shaft 55 linked to the movement of the gear box 10 is connected to an interlocking shaft 71 rotatably mounted horizontally to a bracket 70 fixed on the gear box 10, and an arm 72 extending from the interlocking shaft 71 A pin 73 fixed to the tip is further fixed to the switching plate 68 so that it can be moved up and down by the movement of the turning method switching lever 3.

The end surface of the super pivot turning cam 5 that comes into contact with the roller 62 has a small amount of protrusion toward the roller 62 side, and the side clutch gear 2
8. Move 29 from transmission state to neutral state. or,
The end surface of the pivot turning cam 4 that comes into contact with the roller 62 projects a large amount, and moves the side clutch gears 28 and 29 from the transmission state to the neutral state and further to the rotation stop state.

6.7 is a plate-shaped actuator that prevents switching during operation when the pivot turning cam 4 or the super pivot turning cam-5 is in an operating state, that is, in a position where it comes into contact with the roller 62; It is an internal component.

A pin 74 is provided in a protruding manner on the super pivot turning cam 5, and this pin 74 is fitted into an elongated shaft 86 of a connecting rod 85 connected to the reverse clutch operating shaft 47.

Therefore, as shown in FIG. 4, for example, when one of the steering levers 1 is operated and the cam actuator 67 rotates the super pivot turning cam 5, the side clutch actuator 45 first rotates. The side clutch gear 28 becomes neutral and the cam 6
4 rotates the reversing clutch actuating shaft 47 while the side clutch gear 28 remains in the neutral state, turning the reversing clutch 42 into the engaged state and causing the rotation of one output shaft 31 to rotate via the reversing shaft 39. The other output shaft 30 is rotated in the opposite direction, resulting in a super pivot turn.

In addition, when the cam operating tool 67 is in contact with the pivot turning cam 4, as shown in FIG. 5, only the side clutch actuating shaft 45 is largely rotated to stop the side clutch gear 28 and the pivot turning is performed. It becomes.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a plan view, Figs. 2 and 3 are partial plan sectional views, Fig. 4 is a partial side view, and Fig. 5 is a partial plan view. FIG. 6 is a partial side sectional view, FIG. 6 is a partial plan view, and FIG. 7 is a simplified exploded view showing the power transmission system of the gearbox. 1.2... Steering lever 3... Turning method switching lever 4... Actuating tool for pivot turning 5... Actuating tool for super pivot turning 6.7... Operating guide tool Fig. 4

Claims (2)

[Claims] (1) In a control device for an agricultural vehicle that can select between a pivot turn and a super pivot turn, the operation system of the steering levers 1 and 2 has a pivot switch whose interlocking is switched by operating the turning method switching lever 3. A turning actuator 4 and a super pivot turning actuator 5 are provided, and by switching the turning method switching lever 3, the turning method can be changed between a pivot turning and a super pivot turning without changing the operation method of the steering levers 1 and 2. A control device for an agricultural work vehicle that can be changed to turning. (2) Operation guide device 6 that prevents switching between the two operating tools 4 and 5 when the pivot turning operating tool 4 or the super pivot turning operating tool 5 is linked to the operation of the steering levers 1 and 2 , 7. A control device for an agricultural working vehicle according to claim 1, comprising: .