JP2011050262A - Lock alarm device for rear cover of tilling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that in a form in which a tilling device is lifted and lowered relative to a vehicle body so as to automatically control tilling depth by the vertical movement of a rear cover of the tilling device, the downward movement of the rear cover is often regulated, and when the downward movement of the rear cover is regulated and the rear cover is in a locked state, the rotary tilling device is deformed or easily damaged in performing an operation in the state. <P>SOLUTION: The lock alarm device for the rear cover of the tilling device has a constitution that the rotary tilling device to be lifted and lowered relative to the rear part of tractor vehicle body by a lift arm is equipped with the rear cover for compacting and leveling a soil surface tilled by its tilling tine and the tilling device is lifted and lowered by the vertical swing of the rear cover to maintain and control constant tilling depth. When the tilling device is lowered and traveled forward by the downward movement of the lift arm, the lock alarm device alarms the rear cover in a locked state when a rear cover sensor 7 detects a down angle by input of the rear cover sensor 7 for detecting the angle of the rear cover. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rear cover lock alarm device that warns that a rear cover of a tilling device is in a locked state that cannot be lowered.

  There is known a technique (for example, refer to Patent Document 1) that checks the lift arm lift operation output when detecting an angle at which the rear cover sensor deviates from the working depth control range in accordance with a reverse switching operation or turning operation of the tractor body. Yes.

Japanese Patent Laying-Open No. 2009-340001 (first page, FIG. 1).

  When the rotary tiller is mounted on the tractor body and the rear cover of the tiller is moved up and down, the tiller is moved up and down with respect to the body to perform automatic tilling control. When the downward movement of the rear cover is restricted and locked, the rotary tiller is likely to be deformed or damaged when the work is performed as it is.

  According to the first aspect of the present invention, a rotary cover 3 that can be raised and lowered by a lift arm 2 with respect to the rear part of the tractor vehicle body 1 is provided with a rear cover 5 that suppresses and leveles the soil surface cultivated by the tillage claws 4. When the rear cover 5 swings up and down, the tiller 3 is moved up and down to maintain and maintain a constant tilling depth. When the lift arm 2 is lowered, the tiller 3 is moved downward to move forward. When the rear cover sensor 7 detects the downward angle by the input of the rear cover sensor 7 for detecting the rear cover, a rear cover lock alarm device for the tilling device is configured to warn as a rear cover lock state.

  The plowing depth control sets the target plowing depth reference position, and lowers the plowing device 3 by the lowering operation of the lift arm 2 to ground and advances the soil surface along the plowing depth reference position. Plow to the depth. At this time, the tiller 3 that is lowered by the downward movement of the lift arm 2 causes the rear cover 5 to strongly press the soil surface immediately after tilling as the tillage becomes deeper, and the pressure leveling is reduced. The dynamic rotation angle is detected. In normal normal tillage control, when the tiller 3 is lowered to the tillage position by the lift arm 2, the position of the rear cover 5 in the tilled state is detected by the rear cover sensor 7. Although the rear cover 5 does not rotate up and down, or cannot be rotated up and down, even though it is in the tilling position, the rear cover sensor 7 does not rotate up and down. When the target working depth reference position is not detected, this is set as a rear cover lock state and an alarm is issued.

  According to a second aspect of the present invention, the detection range of the rear cover sensor 7 that detects the downward rotation position on the rear cover 5 includes the tilling area A in the tilling posture and the lowering lock area B that locks the lowering operation of the tilling device 3. When the rear cover sensor 7 detects the tillage area A and does not move, the rear cover lock state is not recognized. When the lower cover area B is detected and does not move, it is recognized as the rear cover lock state. .

  As described above, at the start of tilling work of the tillage device 3 or at the time of tilling work, when the tilling depth changes, the rear cover 5 rotates up and down, and this is detected by the rear cover sensor 7 while raising and lowering the lift arm 2. The plowing device 3 is moved up and down, and the plowing depth by the plowing device 3 is maintained and controlled so as to follow the set plowing depth reference position. At this time, if the angle detected by the rear cover sensor 7 detects the tillage area A and does not move, it is not recognized as the rear cover lock state, and the tilling depth control is continued without warning. When the detection angle by the rear cover sensor 7 detects the lowered lock region B and does not move, this is recognized as a rear cover lock state and an alarm is issued.

  According to a third aspect of the present invention, there is provided a rotary tiller 10 having a quick hitch 10 that automatically hangs the connecting portion of the tillage device 3 at the tip of the lift link 22 that is lifted and lowered by the lift arm 2. The detected value of the rear cover sensor 7 at the time of initial setting of the rear cover sensor 7 of the tilling device 3 for connecting the tiller device 3 to the quick hitch 10 is stored in the memory 9 of the controller 8, and the forward running is performed with the PTO inserted. When this is done, the rear cover lock state is detected and an alarm is issued.

  When the tilling device 3 as described above is mounted on the rear portion of the tractor vehicle body 1, the tilling device 3 in which the rear cover 5 is moved to the lowest position for the mounting is placed on the ground or floor, and the lift is lifted. While moving the tractor body 1 with the arm 2 and the quick hitch 10 lowered, the quick hitch 10 lifts up and hangs the connecting portion of the tillage device 3 so that it is automatically mounted by its own weight. The At this time, the position of the rear cover sensor 7 by the rear cover 5 is stored in the controller 8 as the position of the rear cover lock state. Thereafter, when the vehicle travels forward with the PTO inserted, the rear cover lock state is recognized and an alarm is given.

  According to the first aspect of the present invention, in the tilling depth control of the tilling device 3, the tilling device 3 is moved up and down to control the tilling depth to be maintained at a fixed position by detecting the suppression leveling position of the rear cover sensor 7. However, when the lift arm 2 is lowered and the lift arm sensor 6 detects the down angle, the rear cover 5 does not move up and down, and the rear cover sensor 7 does not detect the down angle, this state is the rear cover lock state. As a warning, take measures to prevent unreasonable tillage work. Therefore, smooth and safe tillage work can be performed without forcibly pressing the rear cover 5 or the like against the soil surface and damaging it.

  According to the second aspect of the present invention, the rear cover lock state is determined based on the detection range of the rear cover sensor 7 that detects the vertical movement angle of the rear cover 5 and the detection state, and the lock state is alarmed. It limits the alarm and increases work efficiency. When the detection area of the rear cover sensor 7 detects the cultivation area A in which the normal tillage action is performed and does not move, the rear cover lock state is not recognized, and the working of the tilling depth control can be continuously performed. Only when the lock region B is detected and the vehicle does not move, it can be recognized as a rear cover lock state and an alarm is issued, so that a safe control operation can be maintained. As described above, since the detection area is the cultivation area A or the lowering lock area B depending on the detection angle of the rear cover sensor 7 (and this sensor arm), the configuration can be simplified and accurate. Control can be performed.

  According to the third aspect of the present invention, when the tilling device 3 is attached to the quick hitch 10 of the vehicle body 1, the detection of the rear cover sensor 7 suitable for connection of the tilling device 3 stored in the memory 9 of the controller 8 as an initial setting. Since the position is recognized and processed as the position of the later tillage work rear cover lock state, when the rear cover 5 remains in the state when the tillage device 3 is attached, the rear cover lock state can be alarmed. It is possible to prevent damage and deformation due to erroneous work of the tillage device 3 and the rear cover 5 and to perform safe work.

The block diagram of tilling depth control. A side view of a rotary tillage device. Overall side view. The perspective view of a tilling device hitch part. The side view which shows interlocking | linkage with a rear cover and a rear cover sensor.

  Based on the drawings, the rotary tiller 3 is connected to the quick hitch 10 at the rear of the tractor body 1. The tractor vehicle body 1 has a front wheel 12 that is steered by a steering handle 11, and an engine 14 mounted under a front bonnet 13 drives a rear axle 16 and a rear wheel 17 via a transmission mechanism of a transmission case 15. Etc. A driver's seat 20 is provided on the seat floor 19 between the left and right fenders 18 above the mission case 15. Further, behind the vehicle body 1, there is a lift arm 2 that is turned up and down by the operation of a lift cylinder 21 that is a hydraulic cylinder, and the lower link 23 that is connected via the lift link 22 is moved up and down by the lift arm 2. The three-point link mechanism is configured by the top link 24 and the like at the center upper side. The quick hitch is attached between the rear ends of the top link 24 and the lower link 23.

  The quick hitch 10 has a hitch hook 27 that engages a mast bracket 26 projecting above the front part of the tilling device 3 on the center upper portion of the hitch frame 25 having a frontal gait shape. A lower hook 30 is provided on both the left and right sides of the lower end portion to receive and fit engagement pins 29 arranged on the front left and right sides of the rotary frame 28, and is engaged with the engagement pins 29 fitted to the lower hook 30. In addition, it has an opening / closing hook 31 for preventing the engagement pin 29 from coming off. When the mast bracket 26 of the tilling device 3 placed on the floor surface is lifted up by the hitch hook 27 in a state where the quick hitch 10 is lowered by the lifting operation of the lift arm 2, the tillage floated on the floor surface. The device 3 is attached so as to be pulled to the front side around the hitch hook 27 by its own weight, fitting the engagement pin 29 to the lower hook 30, and closing the opening / closing hook 31 to keep it from coming off.

  A PTO shaft 32 protrudes from the rear end of the transmission case 15 of the vehicle body 1, and a coupling 34 that is pivotally supported by the central portion of the hitch frame 25 is interlocked via an interlocking shaft 33. As described above, the input shaft protruding from the front surface of the rotary frame 28 attached to the quick hitch 10 is fitted, and the tilling shaft 35 interlocked with the input shaft can be rotated.

  The tilling device 3 has a tilling cover 36 that covers the rotating outer periphery of the tilling shaft 35 having the tilling claws 4, and side covers 37 on both the left and right sides, and a cover hinge 38 at the rear end of the tilling cover 36. A rear cover 5 that rotates up and down is provided, and a rear side cover 39 that covers both right and left sides is provided. A support socket 40 that can be rotated up and down is provided behind the rotary frame 28, and the mast bracket 26 is connected to the mast bracket 26. The height of the gauge wheel 43 attached to the rear portion of the support socket 40 via the wheel arm 44 is changed by connecting and contracting with an adjustment rod 42 that can be adjusted by rotating the handle 41 to adjust the vertical rotation angle. Can be adjusted. An adjustment rod 45 is provided at the rear of the mast bracket 26 so that the tillage cover 36 can be moved back and forth around the tillage shaft 35 by a telescopic adjustment operation. An arm 46 is provided at the upper rear end of the tillage cover 36. A damper rod 47 is slidably provided between the arm 46 and the rear cover 5, and the upper surface of the rear cover 5 is repelled downward by damper springs 48 and 49 fitted around the damper rod 47. By the rotation of the tillage claws 4, the cultivated soil surface can be leveled by being suppressed with an appropriate tension pressure.

  The rear cover 5 of the tillage device 3 is springed downward with respect to the tillage cover 36 via damper springs 48, 49, etc. The rear end lower surface of the rear cover 5 slides in contact with the tillage soil surface. As a result, when it is pivoted up and down around the cover hinge 38, the wire 54 passes through the link rod 50 connected to the upper end of the rear cover 5 and the bell crank 53 pivotally supported 52 on the bracket 51 on the tillage cover 36. By pushing and pulling, the sensor arm 55 of the rear cover sensor 7 provided in the monitor unit on the vehicle body 1 side is interlocked so as to rotate around the sensor shaft 56 in a certain detection area. The tilling device 3 is lowered so as to be in contact with the soil surface by the lowering operation of the lift arm 2, and the tilling claw 4 is rotated at an appropriate depth below the soil surface to perform the tilling action. When the plowing action is performed, the vertical rotation area on the deep side of the sensor arm 55 is a plow area A, and the vertical rotation area on the shallow side is a lock area B. Depending on whether the rear cover lock state is detected in the detection region A or the lowering lock region B, an alarm of the rear cover lock state in the tilling depth control is performed or this alarm is suppressed. When the sensor arm 55 is in the cultivation area A and the sensor arm 55 stops moving, the rear cover lock state is not recognized. Further, when the sensor arm 55 is in the lowered lock region B, the rear cover lock state is recognized only when the sensor arm 55 stops moving.

  The quick hitch 10 attaches and detaches the connecting portion including the mast bracket 26 of the tilling device 3 and the engaging pin 29 of the rotary frame 28, and the coupling 34 at the rear end of the interlocking shaft 33 interlocked with the PTO shaft 32. And an input shaft provided on the rotary frame 28 on the side of the tillage device 3 is fitted and rotated in an interlocking manner. Further, a swing arm 59 that is rotated via the rear cover 5, the link 57, and the wire 58 is provided on the rotary frame 28 side, and the swing arm 59 that is rotated integrally with the front side of the swing arm 59 is rotated. The moving arm 60 is provided on the side of the coupling 34 of the hitch frame 25, and the connecting portion of the tillage device 3 is attached and connected to the quick hitch 10, so that the superposition swing arms 59 and 60 are integrated in the front and rear. In this manner, the rocker is interlocked with each other. In a state where the tilling device 3 is detached from the quick hitch 10, the swinging arms 59 and 60 are separated from each other, the input shaft is detached from the coupling 34, and the tilling shaft 35 cannot be transmitted. The swing arm 60 on the quick hitch 10 side is linked to the rear cover sensor 7 provided on the upper side of the transmission case 15 via a wire 61. The link 57 includes a link rod 50 and a bell crank 53 that are linked to the rear cover 5. A wire 54 that interlocks between the link 57 and the rear cover sensor 7 is constituted by a wire 58 on the link 57 side and a wire 61 on the rear cover sensor 7 side that are configured so as to be separable by the quick hitch 10 part. The rear cover sensor 7 rotates the sensor arm 55 on the sensor shaft 56 as described above against the return spring 62, detects the rotation angle with a potentiometer or the like, and inputs it to the controller 8.

  On the input side of the controller 8, a forward sensor 63 that detects forward travel of the vehicle body 1, a reverse sensor 64 that detects reverse travel, a lift switch lever 65 that raises and lowers the lift arm 2, and a snake control that detects the front wheel steering angle. Angle sensor 66, rear cover sensor 7 that detects the angle of the rear cover 5, lift arm sensor 67 that detects the rotation angle of the lift arm 2, left and right tilt sensor 68 that detects the left and right tilt angle of the tilling device 3, and vehicle speed sensor 69 Etc. Further, on the output side, an ascending solenoid 70 and a descending solenoid 71 for hydraulic circuit control for raising and lowering the lift arm 2 with hydraulic pressure, a forward clutch solenoid 72 for traveling the vehicle body 1, a reverse clutch solenoid 73, and the like are arranged. To do.

  Here, a rotary cover 3 that can be moved up and down by a lift arm 2 with respect to the rear part of the tractor vehicle body 1 is provided with a rear cover 5 that suppresses and leveles the soil surface cultivated by the tilling claws 4. The rear cover sensor 7 detects the angle of the rear cover 5 when the plowing device 3 is moved up and down to maintain a constant plowing depth, and the plowing device 3 is lowered and moved forward by the downward movement of the lift arm 2. When the rear cover sensor 7 detects a down angle by input, a rear cover lock alarm device for a tilling device is configured to warn of a rear cover lock state.

  The plowing depth control sets the target plowing depth reference position, and lowers the plowing device 3 by the lowering operation of the lift arm 2 to ground and advances the soil surface along the plowing depth reference position. Plow to the depth. At this time, the tiller 3 that is lowered by the downward movement of the lift arm 2 causes the rear cover 5 to strongly press the soil surface immediately after tilling as the tillage becomes deeper, and the pressure leveling is reduced. The dynamic rotation angle is detected. In normal normal tillage control, when the tiller 3 is lowered to the tillage position by the lift arm 2, the position of the rear cover 5 in the tilled state is detected by the rear cover sensor 7. Although the rear cover 5 does not rotate up and down, or cannot be rotated up and down, even though it is in the tilling position, the rear cover sensor 7 does not rotate up and down. When the target working depth reference position is not detected, this is set as a rear cover lock state and an alarm is issued.

  Further, the detection area of the rear cover sensor 7 for detecting the downward rotation position on the rear cover 5 is set to a cultivation area A in a tilling posture and a lowering lock area B in which the lowering operation of the tilling device 3 is locked. When the rear cover sensor 7 detects the tillage area A and does not move, the rear cover lock state is not recognized, and when the lower cover area B is not detected and moved, it is recognized as the rear cover lock state.

  As described above, when the tilling work starts or during the tilling work, the rear cover 5 rotates up and down when the tilling depth changes, and the lift cover 2 is moved up and down while the rear cover sensor 7 detects this. The plowing device 3 is moved up and down, and the plowing depth by the plowing device 3 is maintained and controlled so as to follow the set plowing depth reference position. At this time, if the angle detected by the rear cover sensor 7 detects the tillage area A and does not move, it is not recognized as the rear cover lock state, and the tilling depth control is continued without warning. When the detection angle by the rear cover sensor 7 detects the lowered lock region B and does not move, this is recognized as a rear cover lock state and an alarm is issued.

  Further, in the rotary tiller 10 having the quick hitch 10 that automatically hangs the connecting portion of the tillage device 3 at the tip end of the lift link 22 that is lifted and lowered by the lift arm 2, the quick hitch 10 is tilled. The detected value of the rear cover sensor 7 at the time of initial setting of the rear cover sensor 7 of the tilling device 3 for connecting the device 3 is stored in the memory 9 of the controller 8, and this rear cover lock state is set when the PTO is inserted and the vehicle travels forward. Detects that it is in the alarm.

  When the tilling device 3 as described above is mounted on the rear portion of the tractor vehicle body 1, the tilling device 3 in which the rear cover 5 is moved to the lowest position for the mounting is placed on the ground or floor, and the lift is lifted. While moving the tractor vehicle body 1 with the arm 2 and the kick hitch 10 lowered, the quick hitch 10 lifts the connecting portion of the tillage device 3 and suspends it automatically. At this time, the position of the rear cover sensor 7 by the rear cover 5 is stored in the controller 8 as the position of the rear cover lock state. Thereafter, when the vehicle travels forward with the PTO inserted, the rear cover lock state is recognized and an alarm is given.

  When the lift arm 2 is moved downward to lower the tillage device 3 to the tilling posture and travel forward, the rear cover lock state is recognized by the information of the rear cover sensor 7 interlocked by the rear cover 5 and an alarm is given. Normally, when the cultivator 3 is lowered, the rear cover 5 is brought into sliding contact with the cultivated soil surface and goes up around the cover hinge 38. Therefore, the rear cover sensor 7 always moves, but the rear cover 5 does not move because the rear cover 5 is locked. If this is the case, the rear cover lock state is recognized and judged and an alarm is given. At this time, when the lift arm 2 is lowered and detected by the lift arm sensor 6, when it is recognized that the rear cover sensor 7 does not move, the rear cover lock state can be warned.

  Further, as shown in FIG. 5, when the rear cover sensor 7 is described as having a sensor arm 55 that pivots up and down in conjunction with the rear cover 5, the position of the sensor arm 55 during the tillage operation is in the lower lock region B. When the arm position on the shallow side and the arm position on the deep side in the cultivated area A may each be in the rear cover lock state, when the sensor arm 55 does not move in this cultivated area A, this state Is a case where plowing is performed at a certain depth, and therefore the rear cover lock state is not recognized even when the sensor arm 55 does not move. Further, when the center arm 55 does not move in the lower lock region B on the shallow side, it is recognized as a rear cover lock state and processed.

DESCRIPTION OF SYMBOLS 1 Car body 2 Lift arm 3 Tillage device 4 Tillage claw 5 Rear cover 6 Lift arm sensor 7 Rear cover sensor 8 Controller 9 Memory 10 Quick hitch

Claims (3)

  A rotary cover (3) that can be lifted and lowered by a lift arm (2) with respect to the rear part of the tractor body (1) is provided with a rear cover (5) that suppresses and leveles the soil surface cultivated by the tilling claws (4). The rear cover (5) swings up and down to raise and lower the tillage device (3) to maintain and control a constant tillage depth, and the lift arm (2) moves down to lower the tillage device (3). When the vehicle travels forward, the rear cover sensor (7) for detecting the angle of the rear cover (5) detects that the rear cover sensor (7) detects the down angle, and a rear cover lock state is alarmed. Rear cover lock alarm device of the device.   The detection area of the rear cover sensor (7) for detecting the downward rotation position on the rear cover (5) is a lower lock area (B) for locking the lowering operation of the tilling position (A) and the lowering device (3). When the rear cover sensor (7) detects the tillage area (A) and does not move, the rear cover lock state is not recognized and the lower lock area (B) is detected and does not move. The rear cover lock alarm device for a tilling device according to claim 1, wherein the rear cover lock state is recognized as a rear cover lock state.   In the rotary tiller having a quick hitch (10) for automatically connecting the connecting portion of the tillage device (3) by suspending the connecting portion of the tillage device (3) to the tip of the lift link (22) lifted and lowered by the lift arm (2), The detected value of the rear cover sensor (7) at the time of initial setting of the rear cover sensor (7) of the tilling device (3) for connecting the tilling device (3) to the quick hitch (10) is stored in the memory ( 9. The rear cover lock alarm device for a tilling device according to claim 1, wherein the rear cover lock state is detected and alarmed when the vehicle is traveling forward with a PTO inserted therein. .

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