JP3791151B2 - Plowing depth sensor mounting device for tillage device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tilling depth sensor mounting device for controlling tilling depth in a rotary tilling device mounted on a riding tractor.
[0002]
[Problems to be solved by the invention]
In order to level the soil surface cultivated by the cultivator, the rear cover provided on the rear side of the cultivating cover is grounded and ground, and the rear cover is simply moved vertically with respect to the cultivating cover. In addition to the pitching operation, a rolling operation that tilts to the left and right is performed to adapt to the unevenness of the cultivated soil surface. However, in order to detect the tilling depth by the tilling depth sensor from the swing of the rear cover having such a configuration, it is difficult to accurately detect the tilling depth because the rolling action is combined.
[0003]
[Means for Solving the Problems]
According to the present invention, a lateral pitching shaft (4) provided at the rear end of the tillage cover (2) of the rotary tiller (1) at the center of the rear end of the tillage cover (2), and the pitching shaft (4). and the ball joint of the upper (5) pitching and rolling freely rear cover frame around (6) connecting the rear cover (3), pivoted on the side of the ball joint (5) around the pitching axis (4) An actuator (7) that is freely supported and has a tip (32) positioned immediately behind the ball joint (5) and that is directly or indirectly contacted with the upper surface of the rear cover (3 ) is provided. (7) It is set as the structure of the cultivation depth sensor attachment apparatus of the cultivation apparatus formed by interlocking with the cultivation depth sensor (9) on a cultivation cover (2) via a link (8).
[0004]
【The invention's effect】
At the time of tillage work by the tillage device 1, the rear cover 3 grounds and leveles the tilled soil surface with the flat portion at the rear end while pitching and rolling around the ball joint 5 portion with respect to the tillage cover 2. By the vertical movement of the rear cover 3, the actuator 7 is rotated around the pitching shaft 4, and is linked to the tilling depth sensor 9 via the link 8. The amount of plowing is detected by detecting the amount of movement. At this time, the tip (32) of the actuator (7) is positioned immediately behind the ball joint (5) and is directly or indirectly contacted with the upper surface of the rear cover (3). Since the action position of the actuator 7 with respect to the head detects the movement of the rear position portion of the ball joint 5, there is little influence by the rolling operation of the rear cover 3, and only the vertical rotation amount around the pitching shaft 4 is measured by the tilling depth sensor 9. It can be detected accurately.
[0005]
【Example】
A three-point link mechanism composed of a lower link 11 and a top link 12 is lifted and lowered via a lift arm, a lift rod, and the like on the rear side of a tractor vehicle body having a front wheel and a rear wheel 10 in a four-wheel drive traveling form. The rotary tiller 1 is mounted by a hitch 13 provided at the rear end of the three-point link mechanism. Reference numeral 14 denotes a top hook of the hitch 13, which can lift and engage the top pin 16 of the mast 15 of the tilling device 1. Reference numeral 17 denotes a lower link which can be fitted to the left and right lower pins 19 of the tiller frame 18, and a lock hook 21 which is rotated by a lever 20 and can be engaged with the lower pin 19 is provided near the lower hook 17. Thus, it is configured to be detachable from the hitch 13 of the tilling device 1.
[0006]
The tilling device 1 has a center drive configuration in which the tilling shafts 23 having the tilling claws 22 are arranged on the left and right sides of the tilling transmission case 24, and the tilling cover 2 is provided on the upper portion of the tilling transmission case 24. A rubber plate 25 is connected to the rear end of the rear cover 3 and a leveling tool 26 is provided at the rear end of the rear cover 3. A stand 27 is attached to the front side of the tillage frame 18 so as to be foldable by a bracket 28.
[0007]
The rear cover 3 is attached to a lateral pitching shaft 4 pivoted by a bracket 29 with respect to a rear end portion of the tilling cover 2 at a substantially central portion of the tilling width, and a ball joint provided around the pitching shaft 4. 5 and a rear cover frame 6 provided on the rear side of the ball joint 5. The rear cover frame 6 can be pivoted up and down with the pitching shaft 4 as a central axis, and can be rotated in a horizontal direction around the ball joint 5. The rubber plate 25 is provided over the entire width of the tillage so as to cover the lower side of the ball joint 5 and the like. The front edge is fixed to the tillage cover and the rear edge is fixed to the front end edge of the rear cover 3. The rear cover 3 is distorted in accordance with the pitching and rolling operations.
[0008]
The actuator 7 linked to the plowing depth sensor 9 is rotatably fitted and supported by a boss 30 on the lateral end portion of the pitching shaft 4 pivoted on the bracket 29, and is normally pressed by the spring 31 to the upper surface side of the rear cover 3. Is done. The plowing depth sensor 9 has a tip 32 positioned immediately behind the ball joint 5 and is directly contacted with the upper surface of the rear cover 3 or indirectly contacted with a member integrated with the rear cover 3. The The tilling depth sensor 9 is composed of a potentiometer, and is linked to the sensor arm 33 from the actuator 7 via the link 8.
[0009]
The rear cover frame 6 branches from the mounting portion with respect to the ball joint 5 to the left and right sides and is connected to a reinforcing frame 34 formed on the upper surface of the rear cover 3 so that the rear cover 3 can be rotated around the ball joint 5 portion. It is said. Reference numeral 35 denotes a joint cover which is attached to the rear cover frame 6 and covers the upper portions of the ball joint 5 and the actuator 7.
[0010]
The leveling tool 26 on the rear side of the rear cover 3 is formed of a leveling plate formed in the same width as the rear cover 3, and a rake 36 is disposed on the lower side. The leveling tool 26 is supported on the rear end portion of the rear cover 3 via an arc-shaped telescopic arm 37 and can perform soil leveling against the spring 38. Reference numeral 39 denotes a slidable guide rod provided between the tillage cover 2 and the rear cover 3. A leaf spring 40 protrudes from the tillage cover 2 onto the rear cover 3 and receives rotation of the rear cover 3 beyond a certain level. 41 is a side cover. Reference numeral 42 denotes a hitch bar for connecting the auxiliary work implement, which protrudes from the rear of the tilling frame 18.
[0011]
The soil surface cultivated by the rotation of the cultivating shaft 23 is leveled by the weight of the rear end portion of the rear cover 3 and the leveling tool 26 and the like. When the rear cover 3 is tilted to the left and right with respect to the tillage cover 2 due to unevenness of the tillage soil surface or the like, it is rolled around the ball joint 5 portion against the elasticity of the rubber plate 25 and the like. When the tilling depth by the tilling claws 1 changes to a shallow depth, the rear cover 3 is rotated up and down around the pitching shaft 4 with respect to the tilling cover 2 due to a change in the pressing resistance by the flat soil surface. The vertical rotation amount of the tillage cover 2, that is, the pitching amount, is less affected by the rolling at the portion immediately behind the ball joint 5 and is not affected by the presence or absence of rolling.
[0012]
The vertical rotation of the rear cover 3 is interlocked with the pitching sensor 9 via the actuator 7 and the link 8. The actuator 7 rotates around the pitching shaft 4 that is the support center of the ball joint 5, and the tip end portion 32 receives the rotation of the rear cover 3 at the portion immediately behind the ball joint 5. Thus, the accurate pitching amount of the rear cover 3 can be detected. In the tilling depth control, when the rear cover 3 is rotated upward from the reference position and the tilling depth sensor 9 detects that the depth is too deep, the lift arm is rotated upward by the output from the controller to raise the tilling device 1. Let me return to the standard working depth. Conversely, when the rear cover 3 is moved down and the tilling depth sensor 9 detects that the tilling depth sensor 9 is too shallow, the tilling device 1 is lowered to return to the reference tilling depth, and the tilling depth is maintained at the set depth. Control.
[0013]
5 and 6, the difference from the above example is that an upper portion of the ball joint 5 is provided with a rubber plate 43 below the tilling depth sensor 9, and the rear end of the rubber plate 43 is connected to an arc-shaped joint cover. It is made to slidably contact the inner surface of 35 and protect the soil spouted from the hindrance on the rear side of the tillage transmission case 24 from adhering to the tilling depth sensor 9. Further, instead of the actuator 7, the upper surface of the joint cover 35 and the sensor arm 33 are connected by a link 8. Reference numeral 44 denotes a mounting bracket for the tilling sensor 9, which is attached to the horizontal rail 45 at the rear end of the tilling cover 2.
[0014]
Since the tillage cover 2 is configured to be movable back and forth with respect to the center drive type tillage transmission case 24, a spacing portion A is formed on the rear side of the transmission case 24. The hook 47 of the rubber plate 43 can be attached to and detached from the holder 46 on the rear side of the tillage transmission case 24 so as to cover the space A. Reference numeral 48 denotes guide rails provided along the left and right side portions of the interval portion A.
[0015]
In FIG. 7, the difference from the above example is that when the auxiliary tiller is attached to the lateral side in the center drive type tiller 1, the auxiliary tiller cover 49, the auxiliary rubber cover 50, and the auxiliary A rear cover 51 and the like are provided. The cover ribs 52 at the lateral ends of the tillage cover 2 and the cover ribs 53 of the auxiliary tillage cover 49 are connected by a fastener such as a bolt, and the cover ribs 54 at the lateral ends of the rear cover 3 are connected. The cover rib 55 of the auxiliary rear cover 51 is connected by a fastener, and the rubber cover 25 and the auxiliary rubber cover 50 are connected by a leaf spring 56. The front and rear ends of the leaf spring 56 are connected to the tip portions of the tillage cover 2 and the rear cover 3. Pitching or rolling of the rear cover 3 and the auxiliary rear cover 51 is performed by the elasticity of the leaf spring 56 together with the rubber plate 25 and the auxiliary rubber plate 50. The blowout of tilled soil is prevented from the gap between the rubber cover 25 and the auxiliary rubber cover 50.
[0016]
In FIG. 8, the difference from the above example is that the cover rib 52 of the tillage cover 2 and the cover rib 53 of the auxiliary tillage cover 49 are positioned at the opposite ends 57 and 58 of the rubber cover 25 and the auxiliary rubber cover 50. By blowing the end edges 57 and 58 of the rubber covers 25 and 50 to the cover ribs 52 and 53, the blowout of the tilled soil is prevented.
[0017]
In FIG. 9, the difference from the above example is that the cover rib 52 of the tillage cover 2 is extended rearward, and the edges 57 and 58 of the rubber covers 25 and 50 are brought into sliding contact with the left and right side surfaces of the cover rib 52. Each of these end edges 57 and 58 may have a hollow form B having rubber elasticity or a lip form C. In FIG. 10, the difference from the above example is that the outer end edge 59 of the auxiliary rubber cover 50 is formed in a taper shape and is brought into sliding contact with the inner side surface of the side cover 41 to prevent the soil from blowing out. Further, the inner end edge 60 of the auxiliary rubber cover 50 and the outer end edge 61 of the rubber cover 2 are formed in a taper shape and closely polymerized to prevent the soil from blowing out.
[0018]
The outer end edge 62 of the rubber cover 2 and the outer end edge 63 of the auxiliary rubber cover 50 are configured to be in sliding contact with the inner side surface of the side cover 41 in the form of a thin lip with a step. The inner end edge 64 of the rubber plate 2 has a shape in which the outer end edge 62 of the rubber plate 2 is vertically aligned with each other. The outer edge 62 of the rubber cover 2 can be in direct sliding contact with the inner surface of the side cover 41 when the auxiliary rubber cover 50 is not provided.
[Brief description of the drawings]
FIG. 1 is a plan view of a rear cover mounting portion.
FIG. 2 is a side view thereof.
FIG. 3 is a side view of a tillage device.
FIG. 4 is a perspective view thereof.
FIG. 5 is a side view showing another embodiment.
FIG. 6 is a perspective view showing a part thereof.
FIG. 7 is a perspective view of a tillage cover portion showing a partially different embodiment and an exploded perspective view of a part thereof.
FIG. 8 is a perspective view of a tillage cover portion showing a part of another embodiment and a back sectional view of a part thereof.
FIG. 9 is a perspective view of a tillage cover portion showing a partially different embodiment, and a back sectional view of a part thereof.
FIG. 10 is a perspective view of a tillage cover portion showing a partially different embodiment, and a back sectional view of a part thereof.
FIG. 11 is a back sectional view showing a part of another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tillage device 2 Tillage cover 3 Rear cover 4 Pitching shaft 5 Ball joint 6 Rear cover frame 7 Actuator 8 Link 9 Plowing depth sensor
32 Tip

Claims (1)

At the rear end of the tillage cover (2) of the rotary tiller (1), a lateral pitching shaft (4) provided at the center of the rear end of the tillage cover (2) and a ball joint on the pitching shaft (4) (5) by the pitching and rolling freely rear cover frame (6) about connecting the rear cover (3), rotatably is支架on the side of the ball joint (5) around the pitching axis (4) The tip (32) is positioned immediately behind the ball joint (5), and an actuator (7) that is directly or indirectly contacted with the upper surface of the rear cover (3 ) is provided. A tilling depth sensor mounting device for a tilling device in which a tilling depth sensor (9) on the tillage cover (2) is interlocked via a link (8).

Images