JP3084010B2 - Mobile farm equipment steering system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering device for a mobile agricultural machine.

[0002]

2. Description of the Related Art Conventionally, for example, as one form of a combine steering device, a steering lever provided in a driving unit and a left and right for intermittently supplying power to a crawler type left and right traveling unit provided in a transmission unit. The side side clutch is interlocked via an interlocking link mechanism, and the steering lever is swung to the left and right to disengage the power to the traveling section in the swing direction via the side clutch. In some cases, the traveling direction can be changed by stopping the traveling section.

[0003] A spin turn lever is separately provided in the driving section, and a spin turn operating section for driving the left and right running sections in opposite directions to each other is operatively connected to the lever.
By operating the lever, the aircraft can be turned by spin.

[0004]

However, in the steering apparatus described above, the normal steering operation performed by operating the steering lever and the spin turn operation performed by operating the spin turn lever are performed by separate levers. When you move from one operation to the other, you have to use
There is a problem in that it is necessary to release the hand from one lever to the other lever and change it, and smooth steering operation cannot be performed.

In addition, a mechanism for normal steering operation using a steering lever and a mechanism for spin turn operation using a spin turn lever are separately provided, which complicates the mechanism.

[0006]

Therefore, in the present invention, a left and right side clutch is provided in a transmission section in which a crawler type left and right traveling section is interlocked and connected, and one left and right side clutch is provided in an operating section. The steering operation tool is interlocked and linked, the intermittent operation of each side clutch is interlocked with the steering operation of the steering operation tool, and the running section linked to the disengaged side clutch is stopped, and the running section is centered. In a steering device for a mobile agricultural machine that enables turning steering of the aircraft, a spin turn operating unit for driving the left and right running units in opposite directions to each other is provided in the mission unit, and the spin turn operating unit is controlled. Connected to the output side of the unit, and the base end of the steering lever of the steering operation tool is pivotally supported by a lever body via a pivot bracket to detect the maximum steering operation of the steering operation tool. Steering operation detection on body Forming a spin turn detected portions on the left and right sides of the steering operation detection unit to form a, and,
On the input side of the control unit, a detection unit in which left and right limit switches in which connection terminals abut on the left and right sides of the steering operation detection unit, respectively, and one selection means for selecting a spin turn operation are provided. Connecting, the spin turn operating section is configured to operate only when the spin turn is selected by the selecting means and the detecting section detects the maximum steering operation of the steering operating tool. It is intended to provide a steering device for an agricultural machine.

[0007]

When the steering operation of the airframe is performed, the airframe can be moved to a desired left or right direction by operating the steering operation tool in a predetermined direction.

In order to turn the airframe, if the steering operation tool is steered until the side clutch is disengaged, the traveling portion interlocked with the disengaged side clutch is stopped, and the operation is stopped. It is possible to make a so-called pivot turn by turning the body around the traveling section.

When it is desired to make a spin turn (rapid turn) in one of the left and right directions, the spin turn is selected in advance by operating the selection means and input to the control unit. When the steering device is steered to the maximum in a predetermined direction, the detection unit detects the maximum steering operation of the steering operation device and inputs it to the control unit, which outputs a signal to the spin turn operation unit. Thus, the traveling part on the turning direction side is driven to travel in the reverse direction by the spin turn operating part, and the traveling part on the other side is driven to travel in the forward direction, so that the aircraft can be smoothly spin-turned.

As described above, according to the present invention, it is possible to simply and reliably select not only the normal steering operation but also the pivot turn operation and the spin turn operation by using one steering operation tool and one selection means. Can be.

[0011]

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

A shown in FIG. 1 is a combine provided with a steering device according to the present invention.

In the combine A, a chassis frame 2 is mounted on a crawler type traveling unit 1, and a transmission unit 8, an engine 9, and a threshing machine are provided on a left half of the chassis frame 2.
The sorting unit 3 is sequentially arranged in the front-rear direction, while the cabin 4 and the Glen tank 5 are sequentially arranged in the right half part in the front-rear direction.
And a culm conveying unit 7 is provided between the cutting unit 6 and the threshing / sorting unit 3. Reference numeral 10 denotes a power transmission mechanism.

In this manner, the power is transmitted from the engine 9 to the transmission unit 8 via the power transmission mechanism 10, and the traveling unit 1, the threshing / sorting unit 3, the raising / cutting unit 6, The motives are transmitted to the cereal culm transport unit 7 to drive the respective driving units. The seed roots are transported to the threshing / sorting unit 3 by the grain culm transporting unit 7, threshing and sorting are performed by the threshing / sorting unit 3, and the sorted fine grains can be stored in the Glen tank 5. I have.

The cabin 4 is suspended on the chassis frame 2 in a vibration-proof manner, and an operating section 11 is provided in the cabin 4. The operating section 11 has one steering lever 12 as a steering operation tool.
A seat 13 is provided at a position behind the seat 13, a clutch pedal 15 is provided on the floor 14, and the clutch pedal 15 is operatively connected to a tension clutch 23 mounted on a power transmission mechanism 10 described later. 55 is a reaping clutch lever.

As shown in FIG. 2, a transmission 8 includes a variable displacement hydraulic pump 21 and a hydraulic motor 22 which constitute a continuously variable transmission mechanism 20 which is an HST.
The input shaft 21a of the hydraulic pump 21 and the output shaft 9a of the engine 9 are interlockingly connected via a traveling drive mechanism 16, which will be described later, and the driving sprocket of the traveling sections 1, 1 included in the transmission case 25 is provided. The output shaft 22a of the hydraulic motor 22 is interlocked and connected to 24,24.

In the transmission case 25, as shown in FIG. 2, the output shaft 22a of the hydraulic motor 22 has left and right side clutches 30a and 30b and left and right side brakes 31a and 31b via a subtransmission gear 29. The right and left drive sprocket shafts 33a and 33b, which are the left and right axles, are linked to the left and right side clutch shafts 32a and 32b.
a, 34b, the left and right side clutch shafts 32a, 32b are operatively connected to each other, the left reduction gear shaft 34a is operatively connected to the clutch main shaft 36a via the reverse rotation transmission shaft 35, and the right reduction gear shaft is connected.
The clutch main shaft 36b is linked to the clutch sub shaft 36b
a and the auxiliary shaft 36b are connected so as to be freely connectable and disconnectable via a spin turn clutch 37 as a spin turn operating portion, and when one of the side clutches 30a, 30b and the brakes 31a, 31b is both disengaged, By turning on the clutch 37, the left and right sprocket shafts 33a, 33b are rotated in opposite directions, so that the left and right running units 1, 1 can perform a spin turn of the body.

As shown in FIG. 3, the clutch cylinders 38a and 38b for turning on and off the left and right side clutches 30a and 30b and the brake cylinders 39a and 39b for turning on and off the left and right brakes 31a and 31b. , Spin turn clutch
A hydraulic pump 75 driven by a motor 74 is connected to the spin turn cylinder 40 for switching the 37 on and off via a solenoid switching valve 71a, 71b, 72a, 72b, 72b, 73 through a circuit, and the switching valve 71a, 71b, 72
Left and right side clutch by electromagnetic switching operation of a, 72b, 73
The clutches 30a, 30b, the brakes 31a, 31b, and the spin turn clutch 37 are appropriately turned on and off.

Further, such a spin turn operation can be performed by a steering device M which is a gist of the present invention described later.

As shown in FIGS. 4 and 5, the left and right side clutches 30a, 30a have levers for actuating the left and right side clutches whose base ends are mounted on the front upper portion of the transmission case 25 so as to be vertically swingable. 18 are linked and linked, and the same lever
The steering lever M for steering operation described above is interlockedly connected to the steering lever 12 via an interlocking link mechanism 41 to form a steering device M,
Operate the steering lever 12 to operate each side clutch 30a, 30b.
Are operated intermittently (on / off operation) so that the aircraft can travel in a desired direction.

The gist of the present invention lies in the structure of the steering device M, which will be described below with reference to FIGS.

That is, as shown in FIG. 4 and FIG. 5, the steering device M interlocks and connects the steering lever 12 to the left and right side clutch operating lever 18 via the interlocking link mechanism 41.
The front operation column 48 is provided with a detection unit S for detecting the maximum turning operation of the steering lever 12, and the detection unit S is connected to the input side of the control unit C, and a spin-turn operation is performed on the output side of the control unit C. The interlocking link mechanism 41 includes a lever body 42, a connecting rod 43, an interlocking arm 44, a rotation support shaft 45, and a vertical swing arm 46.
And a vertically moving rod 47.

The steering lever 12 is provided with a single spin-turn switch 68 as a selection means for selecting a spin-turn operation in the grip portion 12a at the upper end.
Are electrically connected to the electromagnetic switching valve 73 for spin turns, so that the power supply to the switching valve 73 can be turned ON / OFF.

As described above, when performing the spin turn operation, unless the spin turn switch 68 is turned on, the spin turn clutch 37 can be turned on / off via the spin turn electromagnetic switching valve 73. I cannot do it.

As shown in FIG. 6, the lever body 42 is pivotally supported on a front operation column 48 attached to the front wall of the cabin 4 by a pivot 49 so as to be vertically swingable around an axis in the front-rear direction. Connect the base end of the steering lever 12 to the upper end of the
The lever body 42 is pivotally supported by a pivot 64 via a 59 so as to be able to swing back and forth around an axis in the left-right direction.The lever 42 extends a left side portion to the left side to form a connecting rod connecting portion 42a.
The lower portion extends downward to form a steering operation detected portion 42b.

In addition, the steering operation detected portion 42b is located at the lower edge.
42c is formed in the shape of an arc of the same radius centered on the pivot 49, and the stepped concave spin-turn detection section 42 is provided at the left and right ends.
d, 42e. On the right side of the lever body 42, a manual priority changeover switch disconnection section 42f for steering control is provided. 67 is a manual priority changeover switch, 68 is a lever body neutral holding spring, and 69 is a spring connection body.

As shown in FIGS. 4 and 5, the connecting rod 43 is connected to the distal end 42a of the lever body 42 by pivotally supporting the upper end by a pivot pin 50, and extends the lower end to a position directly below the floor 14. Then, the front end of the interlocking arm 44 is pivotally connected by a pivot pin 51.

As shown in FIGS. 4 and 5, the interlocking arm 44 has a rear end attached to the right side of the pivot 45. The pivot 45 is disposed directly below the floor 14. The cabin mounting frame 52 is horizontally traversed in the left-right width direction via a pair of left and right pivot brackets 53, 53 so as to be rotatable.

Further, as shown in FIGS. 4 and 5, the rotation support shaft 45 includes a base end portion of the pedal arm 15a of the clutch pedal 15 which is supported directly below the floor portion 14, and a floor portion.
14, the tip of the pedal arm 15a is raised upward from just before the pivot 45, and is passed through a pedal arm insertion opening (not shown) opened in the floor 14. Projecting upward.

As shown in FIGS. 4 and 5, the vertical swing arm 46 is formed in a substantially L-shape in plan view, and a front end is attached to the left end of the rotation support shaft 45, and a ring-shaped is attached to the rear end. The frame 54 is attached by a pivot pin 55 so as to be rotatable around an axis in the left-right width direction.

As shown in FIGS. 4 and 5, the vertically moving rod 47 has its upper end inserted into the top 54 and positioned at the top and bottom of the top 54, and the springs 56, 57 are attached to the peripheral surface of the rod 47. The rod 47 is elastically supported, and the lower end of the rod 47 is extended substantially vertically downward.
It is connected to the front end of 40 by a pivot pin 58.

The detection section S is configured by mounting left and right limit switches 65 and 66 on the front operation column 48 at positions below the left and right sides of the steering operation detection section 42b.
The connection terminals 65a, 66a of the switches 65, 66 are elastically urged to abut the lower edge 42c of the steered operation detection portion 42b.

In this manner, while the contact terminals 65a and 66a are in contact with the lower edge 42c even when the steered operation detection portion 42b swings, the switch is kept on and the lever body 42 is turned on.
When each of the contact terminals 65a and 66a engages with and comes into contact with the stepped concave spin turn detection portions 42d and 42e, respectively, the switch is turned off, and the detection signal is output. The information is input to a control unit C described later.

As shown in FIG. 7, the control unit C connects left and right limit switches 65 and 66, a manual priority changeover side switch 67, and a spin turn switch 68 to the input side.
The left and right side clutch electromagnetic switching valves 71a and 71b, the left and right brake electromagnetic switching valves 72a and 72b, and the spin turn electromagnetic switching valve 73 are connected to the output side.

As shown in FIG. 4, the power transmission mechanism 10 includes a traveling drive mechanism 16 interposed between the engine 9 and the transmission section 8 and a transmission drive mechanism 16 disposed between the transmission section 8 and the raising and cutting section 6. And a mowing transmission mechanism 17 interposed therebetween.

As shown in FIG. 4, the traveling drive mechanism 16 has an input shaft 21a protruding from the left side wall of the transmission case 25.
And an output shaft 8a protruding from the left side wall of the engine 9 are arranged in front and rear parallel to each other, and the traveling drive belt 19 is attached to each shaft 21a, 8a.
The belt is wound in a relaxed state via pulleys 21b and 8b.
20 can be tensioned and relaxed by a tension clutch 23. As shown in FIG.
It is operatively connected to the clutch pedal 15 via an interlocking mechanism 26.

As shown in FIG. 4, the mowing transmission mechanism 17 is provided between an output shaft 80 protruding leftward from the left side wall of the transmission case 25 and an input shaft 81 of the raising and mowing section 6. The belt 82 is wound in a relaxed state via pulleys 80a and 81a, respectively, and the belt 82 can be tensioned and relaxed by a tension clutch 83. The tension clutch 83 is linked to a clutch lever 85 provided in the driving section 11 Coupling mechanism
The clutch lever 85 is operatively connected to the clutch lever 85 so that the tension clutch 83 can release the pressing and tension of the cutting power transmission belt 82.

In FIG. 4, reference numeral 60 denotes a flywheel of the engine 9, 61 denotes a belt entanglement prevention cover, 62 denotes a cover mounting plate, and 63 denotes a parking brake operating mechanism.

The embodiment of the present invention is configured as described above. According to this embodiment, the following operation and effect are produced.

That is, when the steering operation of the combine A is performed, the steering lever 12 is turned to the left or right, which is the steering direction, so that the lever body 42 → the connecting rod 43 → the interlocking arm. 44 → Rotating support shaft 45 → Vertical swing arm 46 →
Vertical moving rod 47 → Left and right side clutch actuating lever
40 → The left and right side clutches 30a and 30b are operated intermittently, and one of the left and right running parts 1 and 1 is operated to run, and the other is stopped, so that the aircraft can be steered in a desired direction. .

At this time, for example, when it is desired to make a spin turn (rapid turn) to the left, the spin turn switch 68 is turned on and the steering lever 12 is rotated to the left to the maximum. For example, the left limit switch 65 detects the turning operation of the lever 12, inputs the detection result to the control unit C, and outputs a signal from the control unit C to the spin-turn electromagnetic switching valve 73. In conjunction with the switching operation of the switching valve 73, the spin-turn clutch 37 is connected (engaged), the left sprocket shaft 33a rotates reversely in the reverse direction, and the right sprocket 33b rotates forward in the forward direction. The left and right traveling units 1 and 1 can perform a spin turn to the left side of the body.

The spin turn to the right can be performed by rotating the steering lever 12 to the right, which is the opposite side to the above, to the maximum.

As described above, the normal steering operation and the spin turn operation can be smoothly and reliably performed by one steering lever 12.

In addition, the spin turn operation is not performed unless the steering lever 12 is operated with the spin turn switch 68 turned on, so that the spin turn operation is not performed, thereby preventing erroneous operation and improving safety. Can be.

[0045]

According to the present invention, the following effects can be obtained.

That is, both the normal steering operation and the steering operation in which one of the traveling sections is stopped and the body is turned by one steering operation tool are performed by driving the left and right traveling sections in mutually opposite directions. The steering operation for rapidly turning the aircraft, that is, the spin turn operation can also be performed without changing the steering operation tool, so that the simplicity of operation and the safety can be improved.

Further, the spin turn operation is performed after operating one of the selection means for selecting the spin turn in advance.
Unless the steering operation tool is operated to the maximum extent, the spin turn operating section does not operate. Therefore, erroneous operation can be prevented while ensuring simplicity of operation, and safety can be further enhanced.

Further, since a normal steering operation mechanism and a spin turn operation mechanism can be integrated and operated by one steering operation tool, the mechanism can be made compact. In addition, the entire body can be made compact.

[Brief description of the drawings]

FIG. 1 is a side view of a combine provided with a steering device according to the present invention.

FIG. 2 is a schematic explanatory view of a mission unit.

FIG. 3 is a hydraulic circuit diagram.

FIG. 4 is an explanatory side view of the steering device.

FIG. 5 is an explanatory front view of the steering device.

FIG. 6 is a partially enlarged rear view of the steering device.

FIG. 7 is a block diagram of a control unit.

[Explanation of symbols]

 A Combine 1 Running part 8 Transmission part 9 Engine 11 Operating part 12 Steering lever 14 Floor 15 Clutch pedal 15a Pedal arm 40 Left and right side clutch actuating lever 41 Interlocking link mechanism 42 Lever body 43 Connecting rod 44 Interlocking arm 45 Rotation Support shaft 46 Vertical swing arm 47 Vertical movement rod 54 Top

(56) References JP-A-2-267081 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01B 69/00 A01D 69/00 B62D 11/08

Claims (1)

(57) [Claims] A left and right side clutch is provided in a transmission section (8) in which crawler type left and right running sections (1) and (1) are interlocked.
(30a) (30b) provided, each left and right side clutch (30a) (30b)
One steering operation tool provided in the driving section (11) is linked and connected to each side clutch (30a) for the steering operation of the steering operation tool.
The intermittent operation of (30b) is linked, and the running section (1) linked to the disconnected side clutch is stopped, and
In the steering device for a mobile agricultural machine that enables the aircraft to turn around (1), the transmission unit (8) drives the left and right traveling units (1) and (1) to travel in opposite directions. A spin-turn operating unit is provided, which is connected to the output side of the control unit (C), and the steering operation device is detected to detect the maximum steering operation of the steering operation device.
Connect the proximal end of the steering lever (12) via the pivot bracket (59).
Pivot on the bar (42) and the steering operation detector on the lever (42)
(42b) and the left and right sides of the steering operation detector (42b).
Form spin turn detection parts (42d) (42e) on both sides,
Connection terminals on the left and right sides of the steering operation detector (42b).
Left and right limit switches (65) contacting the child (65a) (66a)
The detection unit (S) provided with (66) and one selection means for selecting the spin turn operation
Connected to the input side of the control unit (C), the spin turn is selected by the selection means, and the spin turn actuating unit only when the detection unit (S) detects the maximum steering operation of the steering operation tool. A steering device for a mobile agricultural machine, wherein the steering device is configured to operate.