JPH0553408U - Steering device for mobile agricultural machinery - Google Patents

Abstract

(57) [Summary] [Purpose] To enable both normal steering operation and spin-turn operation with a single steering lever. [Structure] A mobile agricultural machine in which the left and right side clutches provided in the mission section are intermittently operated by swinging a steering lever provided in the operation section to intermittently supply power to the crawler-type left and right side traveling sections. In the steering device, a detection unit for detecting the maximum swing motion of the lever is provided near the steering lever, the detection unit is connected to the input side of the control unit, and the output side of the control unit is connected to the left and right sides. A spin turn actuating unit was connected to drive the side running units in opposite directions.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a steering device for a mobile agricultural machine.

[0002]

[Prior Art]

 Conventionally, for example, as one form of a combine steering device, the steering lever provided in the operating part and the left and right side parts for connecting and disconnecting the power to the crawler type left and right side running parts provided in the mission part. By interlocking with the clutch via the interlocking link mechanism, and swinging the steering lever to the left and right, the power to the traveling part on the swinging direction side is disconnected via the side clutch. , There is one that can change the traveling direction by stopping the traveling part.

Then, a spin turn lever is separately provided in the driving unit, and a spin turn operating unit for driving the left and right running units to run in opposite directions is interlocked with the lever to operate the lever. By doing so, the aircraft can be made to spin-turn.

[0004]

[Problems to be solved by the device]

 However, in the above steering device, the normal steering operation performed by operating the steering lever and the spin turn operation performed by operating the spin turn lever must be used by different levers. When shifting from the operation of to the other operation, it was necessary to release the hand from the one lever to the other lever one by one and change the grip, and there was a problem that a smooth steering operation could not be performed.

Further, the mechanism for the normal steering operation by the steering lever and the mechanism for the spin turn operation by the spin turn lever are separately provided, which makes the mechanism complicated.

[0006]

[Means for Solving the Problems]

 Therefore, in the present invention, the left and right side clutches provided in the transmission section are intermittently operated by swinging a steering lever provided in the driving section, so that power to the crawler-type left and right side running sections can be intermittently operated. In the steering device for mobile agricultural machines, a detection unit that detects the maximum swinging motion of the lever is provided near the steering lever, and the detection unit is connected to the input side of the control unit and the output of the control unit is output. The invention provides a steering device for a mobile agricultural machine, characterized in that a spin turn actuating part for driving the left and right running parts in opposite directions is connected to the side.

[0007]

[Action]

 When carrying out the steering operation of the aircraft, it is possible to move the aircraft in the desired direction by swinging the steering lever in the desired direction. If you want to make a spin turn toward one side, turn the steering lever to the left side to the maximum, and the detection unit detects the turning motion of the lever and inputs it to the control unit. A signal is output from the control unit to the spin turn actuating unit, and the spin turn actuating unit drives the left traveling unit to drive in the reverse direction and the right traveling unit to drive in the forward direction to smooth the aircraft. Can be spin-turned.

Further, a right-side spin turn can be performed by rotating the steering lever to the right side to the maximum opposite to the side opposite to the above.

As described above, in the present invention, the normal steering operation can be smoothly and reliably performed by the single steering lever.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

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

In such a combine A, a chassis frame 2 is placed on a crawler type traveling unit 1, and a mission unit 8, an engine 9, and a threshing / sorting unit 3 are provided in a front-rear direction on a left half portion of the chassis frame 2. On the other hand, the cabin 4 and the Glen tank 5 are sequentially arranged in the front-rear direction on the right-hand side half, and the raising and cutting unit 6 is attached to the front left side of the chassis frame 2, and the cutting unit 6 and the threshing / sorting unit are arranged. A grain culm transporting section 7 is provided between the culm and the culm 3. 10 is a power transmission mechanism.

In this way, power is transmitted from the engine 9 to the mission section 8 via the power transmission mechanism 10, and the mission section 8 drives the traveling section 1, the threshing / sorting section 3, the raising / mowing section 6, The motive power is transmitted to each of the rice stalks and the grain culm transporting section 7 to drive each drive section. The raising and mowing section 6 raises the grain stalks while scraping and cutting the stock, The picked stock is transported to the threshing / sorting unit 3 by the grain culm transporting unit 7, and is threshed and sorted by the threshing / sorting unit 3 so that the sorted refined grains can be stored in the Glen tank 5. ing.

The cabin 4 is vibration-suspended on the chassis frame 2, and a driving section 11 is provided in the cabin 4. The operating section 11 includes a steering lever 12 for steering operation, and A seat 13 is provided to be positioned toward the side, a clutch pedal 15 is provided on the floor portion 14, and the clutch pedal 15 is interlocked with a tension clutch 23 attached to a power transmission mechanism 10 described later. 55 is a reaping clutch lever.

As shown in FIG. 2, the mission unit 8 is provided with a variable displacement hydraulic pump 21 and a hydraulic motor 22 which form a continuously variable transmission mechanism 20 which is an HST on the upper right side of a mission case 25. The input shaft 21a of the hydraulic pump 21 and the output shaft 9a of the engine 9 are interlockingly connected via a running drive mechanism 16 which will be described later, and the drive sprockets 24, 24 of the running parts 1, 1 included in the mission case 25 are connected to The output shaft 22a of the hydraulic motor 22 is linked and linked.

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, 30b and left and right side brakes 31a, 31b via an auxiliary transmission gear 29. The left and right side clutch shafts 32a, 32b are linked together, and the left and right side clutch shafts 32a, 32b are connected to the left and right drive sprocket shafts 33a, 33b via the left and right reduction gear shafts 34a, 34b. The left side reduction gear shaft 34a is interlocked with the clutch main shaft 36a via the reverse rotation transmission shaft 35, and the right side reduction gear shaft 34b is interlocked with the clutch counter shaft 36b to connect the clutch main shaft 36a and the counter shaft 36b. The clutch 37 is connected via a spin-turn clutch 37 as a spin-turn actuating portion so that the clutch 37 can be engaged and disengaged when either of the side clutches 30a, 30b and the brakes 31a, 31b are both disengaged. thing Therefore, the left and right sprocket shaft 33a, 33 b are rotated in mutually opposite directions, so that it is possible to perform the spin turn of the machine body by the left and right side travel units 1,1.

Moreover, as shown in FIG. 3, clutch cylinders 38a, 38b for turning on / off the left and right side clutches 30a, 30b and brake cylinders 39a, 39b for turning on / off the left and right side brakes 31a, 31b are provided. , A spin turn cylinder 40 for turning on / off the spin turn clutch 37, and a circuit connecting a hydraulic pump 75 of a motor 74 drive type via electromagnetic switching valves 71a, 71b, 72a, 72b, 72b, 73 to each circuit. The left and right side clutches 30a, 30b, the brakes 31a, 31b, and the spin turn clutch 37 are appropriately turned on and off by electromagnetic switching operation of the changeover valves 71a, 71b, 72a, 72b, 73.

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

As shown in FIGS. 4 and 5, the left and right side clutches 30a, 30a are for operating the left and right side clutches whose base end is swingably mounted on the upper front side of the mission case 25. The lever 18 is interlockingly connected, and the steering lever 12 for steering operation is interlockingly connected to the lever 18 through the interlocking link mechanism 41 to form the steering device M. 12 is operated to intermittently operate (on / off operation) each of the side clutches 30a and 30b so that the machine body can travel in a desired direction.

The gist of the present invention resides in the structure of the steering apparatus M, which will be described below with reference to FIGS. 3 to 5.

That is, as shown in FIGS. 4 and 5, the steering apparatus M connects the steering lever 12 to the left and right side clutch actuating levers 18 through the interlocking link mechanism 41 to perform front operation. The column 48 is provided with a detection unit S that detects the maximum turning motion of the steering lever 12, the detection unit S is connected to the input side of the control unit C, and the spin turn operation unit is provided on the output side of the control unit C. The spin-turn clutch 37 as described above is connected, and the interlocking link mechanism 41 includes a lever body 42, a connecting rod 43, an interlocking arm 44, a rotation support shaft 45, a vertical swinging arm 46, and a vertical moving rod 47. It consists of and.

The steering lever 12 is provided with a spin-turn switch 68 on the grip portion 12a at the upper end, and the switch 68 is electrically connected to the spin-turn electromagnetic switching valve 73 to connect to the switching valve 73. It is possible to turn on and off the energization of.

In this way, when performing the spin turn operation, unless the spin turn switch 68 is turned on, the spin turn clutch 37 is turned on and off via the spin turn electromagnetic switching valve 73. I am trying not to.

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

Moreover, the steering operation detected portion 42b has the lower end edge 42c formed in an arc shape having the same radius with the pivot 49 as the center, and stepped concave spin turn detected portions 42d, 42 at the left and right side ends. forming e. Further, a manual priority switching switch cutting section 42f for steering control is provided on the right side of the lever body 42. 67 is a manual priority changeover switch, 68 is a lever body neutral holding spring, and 69 is a spring connecting body.

As shown in FIGS. 4 and 5, the connecting rod 43 is connected to the tip 42 a of the lever body 42 by pivotally supporting the upper end with a pivot pin 50, and the lower end to just below the floor 14. It is extended and pivotally connected to the front end of the driving arm 44 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 portion of the rotation support shaft 45, and the rotation support shaft 45 is provided directly below the floor portion 14. The cabin mounting frame 52 thus arranged is laterally laid in the left-right width direction via a pair of left and right pivotal brackets 53, 53 so as to be rotatable.

Moreover, as shown in FIGS. 4 and 5, the rotation support shaft 45 has a base end portion of the pedal arm 15a of the clutch pedal 15 which is pivotally supported immediately below the floor portion 14, It is placed between the floor 14 and the front end of the pedal arm 15a so that it rises upward from just before the pivot shaft 45 and passes through the pedal arm insertion opening (not shown) opened in the floor 14 to the floor. The part 14 is projected upward.

As shown in FIGS. 4 and 5, the up-and-down swing arm 46 is formed in a substantially L-shape in plan view, and has a front end attached to the left end of the rotary support shaft 45 and a ring-like end at the rear end. The saw 54 is attached by a pivot pin 55 so as to be rotatable around the axis line in the left-right width direction.

As shown in FIGS. 4 and 5, the vertically moving rod 47 has its upper end inserted through the top 54 and is positioned above and below the top 54 so that the springs 56 and 57 are attached to the peripheral surface of the rod 47. The lower end of the rod 47 extends substantially vertically downward and is connected to the front end of the left and right side clutch operating lever 40 by a pivot pin 58.

The detection section S is arranged on the front operation column 48 below the left and right sides of the steering operation detected section 42b, and the left and right side limit switches 65 and 66 are attached to each of the switches. The connection terminals 65a and 66a of the terminals 65 and 66 are elastically biased so as to abut the lower end edge 42c of the steering operation detected portion 42b.

In this way, while the contact terminals 65a, 66a are in contact with the lower end edge 42c even when the steering operation detected portion 42b swings, the switch ON state is maintained, and the lever body 42 moves. When the contact terminals 65a and 66a swing greatly and engage with the stepped concave spin-turn detected parts 42d and 42e, respectively, the switch is turned off and the detected signal is detected. Is input to the control unit C described later.

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

As shown in FIG. 4, the power transmission mechanism 10 includes a traveling drive mechanism 16 interposed between the engine 9 and the mission unit 8, and between the mission unit 8 and the raising and mowing unit 6. It is composed of a harvesting transmission mechanism 17 installed in the.

As shown in FIG. 4, the traveling drive mechanism 16 has an input shaft 21a projecting from the left side wall of the mission case 25 and an output shaft 8a projecting from the left side wall of the engine 9 in a front-back direction. The traveling drive belt 19 is wound around each shaft 21a, 8a in a loose state via the pulleys 21b, 8b, and the belt 20 can be tensioned / relaxed by the tension clutch 23. As shown in FIG. 4, the clutch pedal 15 and the clutch pedal 15 are interlocked with each other.

As shown in FIG. 4, the mowing transmission mechanism 17 includes a mowing transmission mechanism between the output shaft 80 protruding leftward from the left side wall of the mission case 25 and the input shaft 81 of the raising / mowing unit 6. The belt 82 is wound around the pulleys 80a and 81a in a relaxed state, and the belt 82 can be tensioned / relaxed by a tension clutch 83.The tension clutch 83 has a clutch lever 85 provided in the driving section 11. The clutch lever 85 is operated by the interlocking connecting mechanism 86 to release the pressing and tension of the harvesting transmission belt 82 by the tension clutch 83.

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

The embodiment of the present invention is configured as described above, and according to this embodiment, the following operational effects are produced.

That is, when carrying out the steering operation of the combine A, the steering lever 12 is pivotally operated 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 → Up / down swing arm 46 → Up / down moving rod 47 → Left and right side clutch operating levers 40 → Left and right side clutches 30a and 30b are operated intermittently, respectively, and the left and right running parts 1 , 1 is operated while one is running 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 spin turn the vehicle to the left (a sudden turn), the spin turn switch 68 is turned on and the steering lever 12 is turned to the left to the maximum extent. For example, the limit switch 65 on the left side detects the turning operation of the lever 12, inputs the detection result to the control section C, and outputs a signal from the control section C to the spin turn electromagnetic switching valve 73. The spin turn clutch 37 is engaged (engaged) in conjunction with the switching operation of the switching valve 73, and the left sprocket shaft 33a rotates in the reverse direction in the reverse direction, while the right sprocket 33b rotates in the forward direction in the forward direction. Thus, the left and right traveling units 1 and 1 can make a spin turn to the left side of the airframe.

Further, a right-side spin turn can be performed by maximally rotating the steering lever 12 to the right side, which is the opposite side to the above.

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

In addition, in the spin turn operation, unless the steering lever 12 is operated with the spin turn switch 68 turned on, the spin turn operation does not occur, so erroneous operation can be prevented and safety is improved. You can

[0044]

[Effect of the device]

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

That is, since only one steering lever can be used for both normal steering operation and spin-turn operation without gripping the same lever, operability and safety can be improved. ..

Further, since the normal operation mechanism and the spin turn mechanism can be integrated and operated by a single steering lever, the mechanism can be made compact and the machine body can be made compact. It can also be achieved.

[Brief description of drawings]

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

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

FIG. 3 is a hydraulic circuit diagram.

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

FIG. 5 is a front explanatory 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 traveling part 8 mission part 9 engine 11 operating part 12 steering lever 14 floor part 15 clutch pedal 15a pedal arm 40 left side clutch operating lever 41 interlocking link mechanism 42 lever body 43 connecting rod 44 interlocking arm 45 turning Spindle 46 Vertical swing arm 47 Vertical movement rod 54 Top

Claims (1)

[Scope of utility model registration request] 1. The left and right side clutches (30a), (30b) provided in the mission section (8) are intermittently operated by swinging a steering lever (12) provided in the operating section (11). In a steering device of a mobile agricultural machine in which the power to the crawler-type left and right side traveling parts (1), (1) can be intermittently connected, the maximum swing of the lever (12) is near the steering lever (12). A detection unit (S) that detects movement is provided, and the detection unit (S) is connected to the control unit (C).
In addition to being connected to the input side of the control section (C), the output side of the control section (C) is connected to a spin turn operating section that drives the left and right side traveling sections (1) and (1) to run in opposite directions. Steering device for mobile agricultural machinery.