JP3092465B2 - Farm work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting and lowering control of a working machine portion of a farm working machine, such as a riding rice transplanter, having a working machine portion mounted on the rear side of a traveling body so as to be able to move up and down.

[0002]

2. Description of the Related Art In an agricultural work machine in which a working machine portion is mounted on a rear side of a traveling vehicle body so as to be able to move up and down, an operation of moving the traveling vehicle body backward in order to prevent the working machine portion from contacting a ridge or the like when moving backward. A configuration is known in which the working machine is automatically raised to the non-working position when the operation is performed. further,
In this agricultural work machine having an automatic ascending function when moving backward,
After the reverse end, in order to prevent the working machine parts forget to return to the working position when to resume the work is moved forward of the aircraft, the lifting operation the working machine part due to the working machine part at the time of the reverse to automatically rise A lifting operation tool that automatically sets a lifting operation tool to a lifting operation position has already been developed.

[0003]

However, the agricultural working machine having the function of automatically ascending the working machine at the time of reversing has the following problems. In other words, when the operation of moving the traveling vehicle body backward is performed, the work machine part automatic ascending function at the time of reverse movement works, and the work machine part does not operate to descend even if the elevating operation tool is operated to the lower position, so the agricultural work machine is moved backward to the garage or the like. If the entrance of a garage or the like is low, the work machine may hit an obstacle above the entrance when the entrance is low. Therefore, it is an object of the present invention to provide a function of automatically raising the work implement portion when the vehicle is moving backward, and to be able to lower the work machine portion as required when the vehicle is traveling backward.

[0004]

In order to solve the above problems, the present invention has the following arrangement. That is, the agricultural work machine according to the present invention is an agricultural work machine in which the work machine portion is mounted on the rear side of the traveling vehicle body so as to be able to move up and down. A lifting mechanism is provided, and after the work equipment portion is raised by the automatic lifting mechanism during reverse movement , the traveling vehicle body is moved forward or neutral again.
The operation of the reverse automatic ascent mechanism until the operation of
It is configured to be in a released state .

[0005]

When the operation of moving the traveling vehicle body backward while the work implement portion is at the work position is performed, the work implement portion is automatically raised . After the work equipment has been lifted , the
Operation is released and the work machine
Can be

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an example of an agricultural work machine according to the present invention.
The riding rice transplanter 1 is provided with a 6-row planting work machine 4 which is a working machine part via a lifting link device 3 so as to be able to ascend and descend behind a traveling vehicle body 2, and further a fertilizer application device is provided at a rear portion of the traveling vehicle body 2. 5 is attached.

The traveling vehicle body 2 includes a pair of left and right front wheels 10, 1
This is a four-wheeled vehicle provided with zero wheels and rear wheels 11,11. A transmission case 12 is arranged at the front of the fuselage, and front wheel axle frames 13 and 13 are provided from left and right side portions of the transmission case.
Are extended to the left and right sides, and front wheel final cases 14 and 14 are provided at the ends thereof. The front wheel support case 15, 15 on the lower side of the front wheel final casing 14, 14 is provided so as to be deflected, the front wheels 10, 10 are attached to the front-wheel vehicle shaft projecting laterally from the outer portion. Also,
The front ends of a pair of left and right vertical frames 17 are fixed to the back of the transmission case 12.
At the rear ends of the members 7 and 17, a horizontal frame 18 for connecting them is fixed. A rear wheel rolling shaft 19 whose axis is oriented horizontally in the front-rear direction is fixedly fitted to the left and right central portions of the horizontal frame 18, and the rear wheel frame 20 is supported by the protruding portion of the rear wheel rolling shaft in a freely rotatable manner. ing. Rear gear case 21 is provided on the right and left ends of the rear wheel frame 20, it is <br/> rear wheel 11, 11-wheel vehicle axis after projecting sideways are mounted from the outer portion. The rear wheel drive power in the transmission case 12 is controlled by the rear wheel drive shaft 2
Power is transmitted to the rear wheel gear cases 21 and 21 via the gears 3 and 23.

[0008] The engine 30 is provided on the vertical frames 10,10. The rotational power of the engine 30 is transmitted to the hydraulic continuously variable transmission 32 via the first belt transmission 31 and to the alternator 34 via the second belt transmission 33. Further, the rotational power after shifting by the hydraulic continuously variable transmission 32 is transmitted to the transmission case 1 via a third belt transmission 35 having a continuously variable transmission mechanism.
2 and to the hydraulic pump 37 via the fourth belt transmission 36. The first belt transmission 31 is provided with a starting clutch 38 using a belt tension roller capable of switching between ON and OFF of the belt tension. Also, between the transmission case pulley 35a of the third belt transmission 35 and the transmission input shaft,
A main clutch 39 including a multi-plate friction clutch is provided.

On the upper part of the fuselage, the front wheels 10,
A steering wheel 40 for turning the steering wheel 10 is provided, and a seat 42 is installed on an engine cover 41 that covers an upper side of the engine 30 at a position behind the steering wheel 40. A lower part of the handle 40 is covered with a front cover 43, and a display panel 45 for displaying various operation states is provided on an upper part of the front cover 43. Around the front cover 43, a main clutch pedal 46,
Starting Kuratchipeda Le, the rear wheel clutch and brake pedal 4
8 (L, R), the rear wheel Defurokkureba over, an accelerator lever
Various operating tools such as a gearshift lever 52 and a running lever 53 are provided. A hydraulic clutch lever 55 is provided on the side of the seat 42. Engine cover 4
The periphery of the front cover 1 and the front cover 43 is a horizontal step floor 57 on which the operator can walk freely.
Further, on the left and right sides of the machine body, shelf-shaped spare seedling frames 58 on which spare seedlings are placed are provided.

The elevating link device 3 includes vertical frames 17, 1
7, a link base frame 60 fixedly provided at the rear end.
An upper link 61 and lower links 62, 62 rotatably attached to the upper and lower links, and a vertical link 63 is connected to the rear ends of these upper and lower links. And the vertical link 63
A connecting shaft fixed to the planting machine side is rotatably inserted and connected to a bearing portion 64 projecting rearward from the lower end of the planting machine, and the planting machine 4 is mounted to be rotatable left and right with respect to the traveling direction. .
The hydraulic cylinder 66 for driving the elevating link device has its base side pivotally supported by a support member (not shown) fixed to the vertical frames 17, 17, and its piston rod side has an upper link 61.
Is connected to the lower end of a swing arm 67 provided integrally with the base of the swing arm 67. When the hydraulic cylinder 66 is expanded and contracted, the lifting link device 3 is moved up and down, so that the planting work machine 4 moves up and down with a constant posture. The switching of the hydraulic cylinder 66 is controlled by a hydraulic valve 68 provided in the planting work machine 4.

The planting work machine 4 includes a transmission case 70 also serving as a frame, a seedling table 71 on which seedlings are placed, and a total of six sets of planting devices 72 for planting the seedlings on the seedling table in a field scene. It has. Power is transmitted from the transmission case 10 of the traveling vehicle body 2 to the transmission case 70 of the planting work machine via a first planting transmission shaft 73, a planting clutch 74, and a second planting transmission shaft 75. A lower part of the planting work machine 4 is provided with a center float 77 for leveling and a pair of left and right side floats 78, 78. The center float 77 is also a sensor for detecting unevenness in a field scene, and the hydraulic valve 68 is operated in accordance with the vertical movement of the center float 77.

The fertilizer application device 5 includes a fertilizer storage section 80 for storing fertilizer, a feeding section 81 for sequentially feeding the fertilizer in the fertilizer storage section downward by a fixed amount, and a fertilizer fed from the feeding section. , And a blower 83 for blowing fertilizer conveying air into the fertilizer hose. The feeding section 81 is driven by a fertilizer driving mechanism 85 which is operated by power taken out from the planting clutch 74, and a motor 86 of the blower 83.
Is driven by the electricity generated by the alternator 34.

As described above, the riding rice transplanter 1 is provided with the hydraulic continuously variable transmission 32, and is capable of continuously shifting the traveling vehicle body 2 forward and backward. This forward / reverse shifting operation of the traveling vehicle body is performed by the traveling lever 53 which is a shift operation tool. Guide hole 5 for guiding traveling lever 53 during gear shifting operation
Reference numeral 3a denotes a crank-shaped pattern, in which a central portion in the left-right direction is a neutral guide portion NG, a front portion in the front-rear direction is a forward guide portion FG, and a rear portion in the front-rear direction is a reverse guide portion. It is BG. When the travel lever 53 is operated on the neutral guide portion NG, the aircraft stops, and when the travel lever 53 is operated on the forward guide portion FG, the aircraft advances,
When the travel lever 53 is operated on the reverse guide portion BG, the vehicle moves backward. During forward operation, the forward speed is increased as the travel lever 53 is rotated more forward, and during reverse operation, the reverse speed is increased as the travel lever 53 is more rotated backward.

The raising and lowering operation of the planting work machine 4 is performed by the hydraulic and planting lever 55 which is a lifting and lowering operation tool. The operation of the hydraulic pressure / planting lever 55 is interlocked with the hydraulic valve 68 and the planting clutch 74. When the hydraulic / planting lever 55 is in the neutral position, oil does not flow through the hydraulic valve 68 and the work implement is fixed, and when the hydraulic / planting lever 55 is turned upward, oil is supplied in the direction in which the hydraulic cylinder 66 extends. The flow becomes “working machine up”, and when the hydraulic / planting lever 55 is turned downward by one step, the oil flows in the direction in which the hydraulic cylinder 66 contracts, resulting in “working machine down”. When the hydraulic pressure / planting lever 55 is in the range from “working machine up” to “working machine down”, the planting clutch 74 is in the disengaged state, and the planting work machine 4 is not driven. Hydraulic and planting lever 55 downward 2
When the stepwise rotation operation is performed, the hydraulic valve 68 is switched according to the unevenness of the field scene detected by the center float 77 to raise and lower the planting work machine 4 as appropriate, and the planting clutch 74 is engaged to drive the planting work machine 4. "Automatic lifting"
become.

Further, the lifting and lowering operation of the planting work machine 4 is performed by manual operation using the hydraulic / planting lever 55 as well as in FIGS.
Is controlled by a lifting control system shown in FIG.
Next, the elevation control system will be described.

In FIG. 4, reference numeral 99 denotes a drive unit for a hydraulic / planting lever, and a pinion 101 is connected to an output shaft of the electric motor 100.
And the lift gear 102 is engaged with the pinion. A connection point P eccentric from the rotation center O of the lift gear 102 and a tip end of an arm 104 integrally fixed to the hydraulic and planting lever 55 are connected by a rod 105. In the connecting portion between the arm 104 and the rod 105, the engaging pin 104a of the arm is loosely fitted near the arm side end of the elongated hole 105a of the rod, and when the rod 105 is pulled by the rotation of the lift gear 102, the arm 104 is fixed at a predetermined position. However, when the rod 105 is pushed, the arm 104 is not rotated.

SWK is a key switch of the rice transplanter.

SWL is a push button type lift switch, which is turned on when the button is pressed and turned off when the button is returned. Also,
When the button is pressed, the lamp LP is turned on.

SW1 is a first control switch, which is switched in accordance with the operating position of the travel lever 53.
Is turned on when "reverse" is operated, and turned off otherwise.

Reference numeral SW2 denotes a second control switch which is driven by a cam 108 fixed to the lift gear 102, and is turned off while the cam 108 is pushing the switch lever, and turned on when the cam 108 is released from the switch lever.

RS1 is a first relay switch.
When no current flows through the contact C1, the contact PC1 opens, and when a current flows through the coil C1, the contact PC1 closes.

Reference numeral RS2 denotes a second relay switch. Like the first relay switch RS1, the contact PC2 opens when no current flows through the coil C2, and closes when the current flows through the coil C2. I have.

TS is a timer relay switch. When a current flows through the coil C3, the contact PC3 closes. However, when a set time t elapses due to the action of the timer T, no current flows through the coil C3 and the contact PC3 opens. (See FIG. 6). The set time t is set to be longer than the time required for the planting work machine 4 to rise from the working position to the non-working position.

When the planting machine 4 is lowered to the working position to move the machine forward (planting operation state) or stop, the key switch SWK is ON, the lift switch SWL, the first control switch SW1, and the Two control switch S
W2, the first relay switch RS1, the second relay switch RS2, and the timer relay switch TS are in the OFF state, and the motor 100 is stopped (the circuit state in FIG. 5).

When the traveling lever 53 is operated to "reverse" from the above state, the first control switch SW1 is turned on, a current flows through the coil C1, and the first relay switch RS1 is turned on.
, The current flows through the coil C3, and the timer relay switch TS is turned on. As a result, the circuit of A is closed, a current flows through the coil C2, and the second relay switch RS
2 turns ON, and the motor 100 starts. Then, the lift gear 102 rotates in the direction of the arrow in FIG. 4, and accordingly, the rod 105 is pulled to the left in the figure, and the hydraulic / planting lever 55 is shifted from “automatic raising / lowering” to “work machine raising”. As a result, the planting work machine 4 moves up to the non-working position. When the planting work machine 4 rises to a certain height, the hydraulic / planting lever 55 is returned to “work machine fixed” by an interlocking mechanism (not shown), and the planting work machine 4 stops rising. When the lift gear 102 starts rotating, the second control switch SW2 is also turned on, and the circuit B is closed.

When the rotation angle of the lift gear 102 exceeds a certain value, the rod 105 is pushed rightward in the figure. However, since the engaging pin 104a slides along the elongated hole 105a, the traveling lever 53 It is held at "work equipment lift" without rotating operation.

When the planting work machine 4 rises to a certain height for a while (time t has elapsed since the lift switch SWL was pressed), the timer relay switch TS is turned off and the circuit A is opened, but the circuit B is closed. Coil C
2 continues to be energized, and the motor 100 continues to rotate. Then, when the lift gear 102 makes one rotation, the second control switch SW2 is turned off again, and both the circuits A and B are opened, so that the second relay switch RS2 is turned off and the motor 100 stops.

[0028] Thus, reverse automatic lifting mechanism for raising the automatic operation and planting work implement 4 the travel lever 53 a hydraulic-planting lever 55 is operated to the "reverse" to "working machine raising"<br/> Therefore, even if an attempt is made to back up the machine while keeping the planting work machine 4 in the working position, the planting work machine 4 automatically rises to the non-working position in conjunction with the operation of the traveling lever 53,
An accident in which the planting work machine 4 comes into contact with a ridge or the like can be prevented.

When the above operation is completed, the timer T does not operate until the first control switch SW1 is once turned off and then turned on again, so that the above-mentioned automatic ascending function during reverse movement is released. . Therefore, when the hydraulic / planting lever 55 is operated to “working machine down”, the planting work machine 4 is lowered, and when the hydraulic / planting lever 55 is operated to “working machine up”, the planting work machine 4 is raised. I do. When the travel lever 53 is operated to “neutral” or “forward” and then to “reverse” again, the automatic ascent function during reverse travel is restored.

Also, when the lift switch SWL is pressed, the hydraulic and planting lever 55 is shifted from "with planting" to "lifting the work machine", similarly to the case where the traveling lever 53 is operated to "reverse". Then, the planting machine 4 rises to the non-working position. Therefore, without using the automatic ascent function during reverse movement, the pilot manually operates the lift switch SW prior to the reverse movement of the aircraft.
The planting work machine 4 may be raised by pressing L.

Further, even if the key switch SWK is turned off during the raising operation of the planting work machine 4, the motor 100 does not stop until the lift gear 102 makes one rotation. For this reason, the rod 105 does not stop at the position where the rod 105 is pulled to the left, so that it is possible to prevent the hydraulic and planting lever 55 that is operated to “lift the work implement” from becoming unable to move.

[0032]

As described above, according to the present invention, agricultural machine according to the present invention, provided when the vehicle body Ru is reverse, the reverse automatic lifting mechanism for automatically raised to the non-working position the working machine section
Since it is, inadvertently working machine part during reverse travel can be prevented from contacting the ridge or the like, moreover, after rise of the working machine part by said reverse automatic lifting mechanism, the operation by the reverse automatic lifting mechanism It is released, and the working machine part can be lowered when necessary when moving backward, so that it is possible to move backward while maintaining the working part at an arbitrary height, such as colliding the working machine with an object located above Accidents can now be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a riding rice transplanter.

FIG. 2 is a plan view of the riding rice transplanter.

FIG. 3 is a plan view illustrating a transmission configuration of a traveling vehicle body.

FIG. 4 is a diagram illustrating a configuration of a work implement partial elevating control system.

FIG. 5 is an electric circuit diagram of a work machine part elevation control system.

FIG. 6 is a diagram showing a relationship between a coil side current and a contact side current of the timer relay switch.

[Explanation of symbols]

 RS1 First relay switch RS2 Second relay switch SWK Key switch SWL Lift switch SW1 First control switch SW2 Second control switch TS Timer relay switch 1 Passenger rice transplanter 2 Running car body 3 Elevating link device 4 Planting work machine (working machine part) ) 53 Travel lever 55 Hydraulic / planting lever (elevating operation tool) 100 Motor

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor, Hisashi Kamiya, 1st Higashikura, Tobe-cho, Iyo-gun, Ehime Prefecture, Iseki Agricultural Machinery Co., Ltd. Technology Department (72) Inventor Tatsuyuki Ouchi 1 Tokura-cho, Higashi-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. In-house (72) Inventor Takuya Okada 1-Yachikura, Tobe-cho, Iyo-gun, Ehime Pref. Iseki Agricultural Machinery Co., Ltd. (56) References JP-A-3-258667 (JP, A) JP-A-2-109901 (JP, A (58) Fields surveyed (Int. Cl. ⁷ , DB name) A01C 11/02 320-332 A01B 63/10

Claims (1)

(57) [Claims] An agricultural work machine having a working machine portion mounted on a rear side of a traveling vehicle body so as to be able to move up and down, provided with a reverse automatic lifting mechanism that raises the working machine portion to a non-working position when an operation of moving the traveling vehicle body backward is provided. After the work machine portion is raised by the automatic raising mechanism during reverse travel, the traveling vehicle body is moved forward or neutral again.
Until the operation is performed, the operation of the above-mentioned automatic ascent mechanism during reverse
A farm working machine characterized in that it is configured to be in a state of being moved .