JPH06892Y2 - Land leveling equipment for agricultural work machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a ground leveling device in an agricultural work machine, for example,
The present invention relates to one that automatically adjusts the depth of a rotary working body.

(Prior Art) Conventionally, as a ground leveling device of this kind, for example,
As described in Japanese Patent Publication No. 9-170405, a cover body is provided on the upper part of the rotary tiller, and a ground sensor also serving as a grounding plate is attached to the rear end of the cover body so as to be vertically rotatable. There is known a structure in which a rear end portion of the grounding sensor is supported by a suspension rod and a coil spring wound around the suspension rod so as to be vertically movable.

Further, as described in Japanese Patent Laid-Open No. 56-39701, a rear cover is hinged to a rear edge of a rotary cover covering the upper part of a tiller, and a plurality of rear cover are attached to the rear edge of the rear cover. There is known a structure in which leveling plates are screwed by hinges so as to be rotatable in the vertical direction, and the rear edge of each leveling plate is used as a sensing body that makes sliding contact with the cultivated soil surface.

Furthermore, as described in JP-B-58-30405, a rear cover is pivotally supported at the rear end of the tillage cover,
There is known a structure in which a sensing plate which also serves as a grounding plate is connected to the rear end of the rear cover, and the sensing plate is pivotally supported by a sensing rod of a transmitter pivotally supported by a frame.

(Problems to be Solved by the Invention) The structure described in each of the above publications attempts to level the cultivated soil while sensing the working depth (plowing depth) of the rotary working body with the leveling plate (flat plate). That is, when the rotary working body descends from the set working depth depending on the working conditions in the field and performs deep cultivating soil work, the soil grading plate pushes the cultivating soil too strongly to form recesses on the surface. In addition, when the rotary working body rises above the set working depth and shallowly cultivates the soil, it is intended to prevent uncertain ground leveling by the ground leveling plate.

However, in the structure disclosed in Japanese Utility Model Laid-Open No. 59-170405, since the ground leveling plate which also functions as a grounding sensor is made of a rigid body for leveling the cultivated soil, the ground leveling plate also serving as a ground sensor is discharged from the rotary cultivator during the progress of leveling. The grounding sensor may malfunction due to the strong impact of the cultivated soil that is constantly generated, and the vibration may cause the grounding sensor to malfunction.In addition, even if the plowing depth of the rotary cultivator is at the set position, the ground leveling plate is set by increasing the amount of cultivated soil. The angle is easy to change,
The ground sensor may malfunction due to the amount of change in the angle, which is not preferable for accurate and stable ground leveling.

Further, JP-A-56-39701 and JP-B-58-
In the structure described in Japanese Patent No. 30405, a sensing plate that also serves as a leveling plate is continuously provided at the rear end portion of the rear cover, but since the sensing plate that also serves as the leveling plate is made of a rigid body for leveling cultivated soil, There is a problem similar to the case of the structure described in Japanese Utility Model Laid-Open No. 59-170405.

The present invention has been made in view of such a point, and it is possible to buffer the strong impact of the cultivated soil discharged from the rotary working body on the ground leveling body and prevent the sensor from malfunctioning due to its vibration. Even if the amount of cultivated soil increases with the depth of the body set to the set position, the set position of the sensor's sensing unit will not easily change and the sensor will not malfunction, enabling accurate and stable ground leveling. Therefore, it is an object of the present invention to provide a soil leveling device for an agricultural work machine capable of detecting a change in the soil leveling body with high accuracy and automatically adjusting the depth of the rotary working body in accordance with the change.

(Means for Solving Problems) A soil leveling device for an agricultural working machine according to the present invention comprises a main frame, a rotary work body rotatably provided on the main frame, and a cover covering an upper portion of the rotary work body. Body, a ground leveling body which is attached to the rear end of the cover body so as to be vertically movable, and grounds the crushed soil cultivated by the rotary working body, and a ground leveling position and a soil leveling level which are arranged at the rear part of the ground leveling body. A rake that is variably set at a position, and a sensor that outputs to a depth adjustment mechanism that adjusts the depth of the rotary working body is provided, and the ground leveling body is a rubber plate attached to a rear end portion of the cover body. And a second leveling plate made of a metal plate attached to a rear end portion of the first leveling plate, the second leveling plate being rearward from the main frame. The lifting rod and The suspension rod is supported movably up and down via a coil spring that holds the suspension rod, and a connecting projection is projected rearward at an intermediate portion in the left-right direction of the second grounding plate to form an intermediate portion in the left-right direction of the rake. The connecting piece is projected to the portion, and the connecting piece of the second grounding plate is pivotally supported on the connecting piece by a support shaft so as to be vertically rotatable, and the vertical movement of the second grounding plate is performed on the support shaft. A sensing unit for sensing and operating the sensor is rotatably supported.

(Operation) In the ground leveling apparatus for agricultural working machine of the present invention, when the rotary working body is rotationally driven, the cultivated soil is cultivated and crushed by the rotary working body, and the crushed soil is guided by the cover body and the rubber at the rear portion is guided. It is discharged to the first leveling plate made of plates, dropped from the first leveling plate along the second leveling plate, and is lowered to the second leveling plate by the progress of the second leveling plate. The soil is leveled in order.

In this case, since the first ground leveling plate is made of a rubber plate, a strong impact of the cultivated soil discharged from the rotary working body on the first ground leveling plate is buffered, and the vibration prevents the sensor from malfunctioning. Also, when the amount of cultivated soil increases with the working depth of the rotary work body at the set position, the first rectifying plate elastically deforms rearward and upward due to the cultivated soil, and the second rectifying plate is intermediate. The sensor part of the sensor is not lifted immediately to operate because the angle is changed by rotating around the support shaft that supports the sensor part of the rear end, and therefore the position of the sensor part of the sensor changes significantly. The sensor does not malfunction and the ground is accurately and stably grounded.

Further, when the working depth of the rotary work body moves up and down by a larger amount than the set position, the leveling body, especially the second leveling plate is moved up and down, and the sensor of the sensor is detected by the support shaft of the second leveling plate. The section is moved up and down to be sensed and actuated, and this sensor is actuated and is also output to the depth adjustment mechanism, and the depth of the rotary work body is automatically adjusted by the operation of the depth adjustment mechanism.

Also, when the rake body is set horizontally, this rake body proceeds with the second leveling plate while sequentially cultivating the cultivated soil, and the rake body is set downward with an angle. In this case, the rake body is used to collect the cultivated soil and gradually advance the soil.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is a machine frame, which has a main frame 2 which is long in the left-right direction, and a chain case 3 and brackets (not shown) are arranged at opposite left and right ends of the main frame 2, respectively. It is fixed. Further, connecting arms 4 are projected forward on both left and right sides of the main frame 2, and hitch metal fittings 5 are attached to the tip ends of the left and right connecting arms 4. Further, a mission 7 is provided at an intermediate portion of the main frame 2 so as to rotatably project the input shaft 6 forward, and a mast 8 is projected forward at an upper portion of the mission 7.
A hitch metal fitting 9 is attached to the front end of the mast 8, and a tumbler 11 having a guide hole 10 penetrating in the front-rear direction is rotatably mounted on a support shaft 12 at the upper end of the mast 8. There is.

Next, a rotary working body 13 is rotatably mounted between lower ends of the chain case 3 and the bracket. The rotary working body 13 includes a cultivating shaft 14 rotatably mounted between lower ends of a chain case 3 and a bracket.
In the axial direction of the cultivating shaft 14, a large number of cultivating claws or crushing claws 15 are radially projected on the circumferential side portion. And
The rotary work body 13 is rotatably linked to the mission 7 through an output shaft of the mission 7 rotatably inserted in the main frame 2 and an interlocking medium such as an endless chain in the chain case 3. ing.

In addition, a cover body 16 covering the upper part and the left and right upper parts of the rotary working body 13 is disposed and fixed between the chain case 3 and the bracket, and the ground body 17 is provided at the rear end of the cover body 16. The front end of is fixed with a large number of screws 18. This leveling body 17 is the first leveling plate made of a rubber plate.
19 and a second leveling plate 20 made of a metal plate. The front end of the first leveling plate 19 is fixed to the rear end of the cover body 16 with a large number of screws 18. At the rear end of the leveling plate 19, a bent locking portion 21 at the front end of the second leveling plate 20 is fixed by a large number of screws 22.

The lower ends of the suspension rods 23 are pivotally attached to the left and right sides of the second leveling plate 20 so as to be rotatable in the front-rear direction, and the upper portions of the left and right suspension rods 23 are attached to the main frame 2. It is vertically movably inserted into a guide hole 25 of a suspension arm 24 which projects rearward from both left and right sides. Also, the left and right suspension rods 23
A stopper 26 is attached to the upper end of the above so that its vertical position can be adjusted, and is located between the stopper 26 of the left and right suspension rods 23 and the opening edge 27 of the guide hole 25 of the left and right suspension arms 24. Coil springs 28 are wound around the left and right suspension rods 23, respectively. Then, the second leveling plate 20 has the left and right suspension arms 24 and the coil springs 28.
It is supported so that it can move up and down.

Further, connecting projections 29 projecting rearward are fixed to the middle and left and right sides of the second grounding plate 20, and the connecting projections 29 located in the middle of each of the connection projections 29 are fixed. A stopper 30 with which the connecting projection 29 abuts is fixed to the front portion of the so as to project upward.

Next, the connecting protrusions 29 on both left and right sides of the second leveling plate 20.
A rake body 31 is rotatably attached to the intermediate connecting projection 29 so as to be vertically rotatable. The rake body 31 includes a connecting piece 32 on both left and right sides and a connecting piece on the middle portion of the second grounding plate 20, which are projected at positions corresponding to the connecting projecting pieces 29 on both left and right sides and the connecting projecting piece 29 on the middle part. An insertion hole that has a piece 32, and each connection piece 32 communicates with an insertion hole 33 formed in each connection projection piece 29.
34 are formed. Then, the opposing insertion holes 3
Bolts 35 serving as spindles are respectively inserted between the three and the three, and nuts are screwed to the bolts 35. The bolts 35 are centered on the bolts 35 and the second grounding plate 20 is provided with the nuts. A rake body 31 is pivotally mounted so as to be vertically rotatable.

In addition, a suspension rod 36 is provided on the connecting piece 32 in the middle of the rake body 31.
The lower end of this is pivotally attached so that it can rotate in the front-back direction.
A base end portion of a column 38 is pivotally attached to a portion near the upper end of the support shaft 36 by a support shaft 37 so as to be vertically rotatable, and a tip portion of the column 38 is relatively projected from a rear surface portion of the mission 7. The bolts 42 are arranged between the left and right mounting pieces 39, and the insertion holes 40 of the left and right mounting pieces 39 and the insertion holes 41 at the tips of the columns 38 are inserted into the bolts 42. Has been done. A column 38 is rotatably mounted around the bolt 42 so as to be vertically rotatable.

Further, one end of an operating rod 44 is rotatably attached to an upper end portion of the suspension rod 36 by a support shaft 43, and the other side portion of the operating rod 44 is inserted into the guide hole 10 of the tumbler 11. It can be inserted and removed freely,
An operation handle 45 is attached to the other end of the operation rod 44,
A coil spring 47 is wound around the operating rod 44 between the stopper 46 and the tumbler 11 in the middle of the operating rod 44. The operating rod 44 is urged and supported by the coil spring 47, and locking means (not shown) is provided between the tumbler 11 and the operating handle 45 for locking the advancing / retreating position of the operating rod 44. .

Next, using a bolt / nut 71 having the mast 8 axially attached to a fixture 70 on one side of the mission 7 and a bolt / nut 42 having the post 38 axially attached to the rear end of the mission 7, The left and right sensor mounting arms 48 are fastened together, and a sensor assembly 51 having a built-in sensor 50 is fixed by a plurality of bolts and nuts 52 on a sensor mounting plate 49 fixed to this one sensor mounting arm 48. . Further, the sensor 50 is connected to the automatic depth control mechanism of the tractor via the cord a.

Further, one end of an interlocking rod 54 is rotatably attached to a rear end of the one sensor mounting arm 48 by a support shaft 53, and a support shaft 55 is attached to the other end of the connecting rod 54. An upper end portion of a push rod 56 serving as a sensing portion of the sensor 50 is rotatably attached to a shaft, and an insertion hole 57 formed at a lower end portion of the push rod 56 has an intermediate portion of the second leveling plate 20. A bolt 35 having a connecting projection 29 and a connecting piece 32 at an intermediate portion of the rake body 31 rotatably attached is inserted and fastened together with a bolt 35 and a nut. The lower end of the is pivotally attached so as to be rotatable in the front-rear direction.

Further, an adjusting metal fitting 58 is provided as a support shaft near the tip of the interlocking rod 54.
It is attached rotatably at 59, and the insertion hole 60 of this adjustment fitting 58
A screw shaft portion 62 of a base end portion of an operating rod 61 for operating the sensor 50 is inserted thereinto so as to be capable of advancing and retracting, and the adjusting metal fitting 58.
Front and rear nuts 63 are screwed to the screw shaft portions 62 in the front and rear portions, respectively, so that their positions can be adjusted.

Next, the operation of the above structure will be described.

The connecting frame 64 is connected and suspended to the three-point suspension mechanism of the tractor, and the upper connecting rod 65 and the lower connecting rods 66 on both left and right sides of the connecting frame 64 are connected to the hitch fittings 5 and 9 of the machine, respectively. Further, one end of the power transmission shaft is connected to the power take-off shaft of the tractor via a universal joint, and the other end of the power transmission shaft is connected to the input shaft 6 of the machine via the universal joint.

Also, on the tractor side, activate the automatic depth adjustment mechanism,
The three-point suspension mechanism adjusts and sets the working depth (plowing depth) of the rotary working body 13 of the machine, and also adjusts and sets the second ground leveling plate 20 of the ground leveling body 17 and the ground leveling position of the rake body 31,
Further, according to the position of the second leveling plate 20, the nuts 63 at the front and rear of the operating rod 61 are adjusted forward and backward with respect to the screw shaft portion 62, and the operating rod 61 for operating the sensor 50 is adjusted and set.

Next, while pulling the machine with a tractor,
When the input shaft 6 is rotated by the output from the tractor,
Through the output shaft of this mission 7 and the interlocking medium of the endless chain latch in the chain case 3, the rotary working body
13 is rotationally driven to proceed.

The cultivated soil is successively cultivated and cultivated by the rotary working body 13, and the crushed soil is guided by the cover body 16 and discharged to the first leveling plate 19 in the rear leveling body 17, and While being guided and dropped downward from the first leveling plate 19 along the second leveling plate 20, the cultivated soil at the rear part of the rotary working body 13 has the first and second leveling plates 19 and 20 and a horizontal shape. The rake body 31 arranged on the ground lands the ground in order.

In this case, since the first leveling plate 19 is made of a rubber plate,
The strong impact of the cultivated soil discharged from the rotary working body 13 on the ground leveling plate 19 is buffered, and the vibration prevents the push rod 56 from moving up and down.
Is prevented from malfunctioning. When the amount of cultivated soil increases with the working depth of the rotary work body 13 at the set position, the first landslide plate 19 elastically deforms rearward and upward due to the cultivated soil, and the second landscaping plate. 20 rotates around the bolt 35 that pivotally supports the push rod 56 on the connecting projection 29 in the middle to change the angle, and the push rod 56 is not immediately lifted and operated. The position does not change significantly and the sensor does not malfunction, and accurate and stable grounding is performed.

Further, the rotary work body 13 cultivates soil in a state where the rotary work body 13 is lowered from the set plowing depth depending on the progress of the field, and the ground leveling body 17, especially the second ground leveling plate 20 receives a strong earth pressure, and the second ground leveling plate 20 and the brake When the body 31 relatively upwardly pivots and changes, the push rod 56 is pushed up by the bolt 35 of the connecting projection 29 at the intermediate portion of the second ground plate 20, and the interlocking rod is also moved by the push rod 56. 54 is pushed up and rotated about the support shaft 53.

The operating rod 61 is pushed forward by the interlocking rod 54, and the sensor is activated by the operation of the operating rod 61.
51 is operated, the automatic depth control mechanism of the tractor is driven by the output signal from this sensor 50, the machine is pulled up by the three-point suspension mechanism, and the rotary work body 13 is automatically adjusted to a predetermined set working depth. To be done. At the same time, the ground leveling body 17 and the rake body 31 are automatically set to a predetermined position by the returning action of the coil springs 28 and 47.

When the rotary working body 13 cultivates soil in a state where the rotary working body 13 is higher than the set plowing depth depending on the progress of the field, and the ground leveling body 17, especially the second ground leveling body 20 is pivotally changed downward, the second ground leveling plate
Push rod with bolt 35 of connecting projection 29 in the middle of 20
As the 56 is pulled downward, this push rod 56
The interlocking rod 54 is rotated downward about the support shaft 53.

Then, the operating rod 61 is pulled backward by the interlocking rod 54, the sensor 50 is operated by the operating rod 61, and the output signal from the sensor 50 drives the automatic depth adjustment mechanism of the tractor. This machine is lowered by the suspension mechanism, and the rotary working body 13 is automatically adjusted to a predetermined set working depth. At the same time, the ground leveling body 17 and the rake body 31 are automatically set to the predetermined positions against the returning action of the coil springs 28 and 47, respectively.

Further, when the rake body 31 is set horizontally, the rake body 31 proceeds with the second leveling plate 20 while sequentially cultivating the cultivated soil, and the angle of the rake body 31 is directed downward. If set, the rake body 31 advances the soil while gradually arranging the cultivated soil while leveling the soil.

In this way, when the leveling body 17 changes relatively in the vertical direction, in accordance with the operation of the leveling body 17, the intermediate rear end portion of the second leveling plate 20, that is, the connecting projection of the intermediate portion of the second leveling plate 20 is connected. Piece 29
And a bolt 35 that axially supports the connecting piece 32 in the middle of the rake body 31.
The sensor 50 is activated via the push rod 56 at
The output signal from the sensor 50 activates the automatic depth adjustment mechanism to automatically adjust the depth of the rotary working body 13 to a predetermined plowing depth.

[Effect of device]

According to the present invention, the ground leveling body attached to the rear end portion of the cover body covering the upper part of the rotary working body comprises a first ground leveling body made of a rubber plate and a second ground leveling plate made of a metal plate. In this second leveling plate, a connecting projection is projected rearward at an intermediate portion in the left-right direction, and a connecting piece protruding at an intermediate portion in the left-right direction of the rake is rotated by the support shaft to the connecting projection. Since the shaft is freely rotatably supported, and the sensing portion of the sensor that senses the vertical movement of the second leveling plate and operates the sensor that outputs to the depth adjustment mechanism of the rotary work body is rotatably rotatably supported. The first leveling plate made of a rubber plate buffers a strong impact of the cultivated soil released from the rotary working body on the first leveling plate, and it is possible to reliably prevent the sensor from malfunctioning due to the vibration. In addition, even when the amount of cultivated soil increases with the working depth of the rotary work body at the set position, the first
The elastic deformation of the ground leveling plate and the change in the angle of rotation about the support shaft of the second ground leveling plate can cope with an increase in the amount of cultivated soil, and the sensing unit of the sensor can be easily activated to prevent the sensor from malfunctioning. In addition, the sensing portion of the sensor is provided on the support shaft that pivotally supports the connecting projection protruding rearward at the left-right intermediate portion of the second leveling plate and the connecting piece protruding at the left-right intermediate portion of the rake. Therefore, the sensing part of the sensor is placed in a place that is not easily affected by the movement of the second ground leveling plate, and the sensor malfunctions even if the left and right parts of the second ground leveling plate move back and forth. It is possible to perform accurate and stable ground leveling. Therefore, more than necessary changes in the ground leveling body can be reliably detected with high accuracy, and
The rotary working body can be automatically adjusted in depth according to the change.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view of an agricultural working machine equipped with a soil leveling device, and FIG. 2 is an exploded perspective view showing a part of the same soil leveling device. 2 ・ ・ Main frame, 13 ・ ・ Rotary work body, 16 ・ ・ Cover body, 17 ・ ・ Leveling body, 19 ・ ・ First leveling plate, 20 ・ ・ Second leveling plate, 23 ・ ・ Suspension rod, 24 ・ ・ Holding arm, 28 ・ ・ Coil spring, 29 ・ ・ Coupling protrusion, 31 ・ ・ Rake body, 32 ・
・ Connecting piece, 35 ・ ・ Spindle, 50 ・ ・ Sensor, 56 ・ ・ Sensor of sensor

Claims (1)

[Scope of utility model registration request] 1. A main frame, a rotary work body rotatably provided on the main frame, a cover body covering an upper portion of the rotary work body, and a rear end portion of the cover body which is vertically movable. A ground leveling body that grounds the crushed soil that has been attached and cultivated by the rotary work body, and a rake that is variably set at the ground leveling position and the soil leveling level, which is disposed at the rear of the ground leveling body,
And a sensor for outputting to a depth adjusting mechanism for adjusting the depth of the rotary work body, wherein the ground leveling body is a first ground leveling plate made of a rubber plate attached to a rear end portion of the cover body, A second leveling plate made of a metal plate attached to a rear end portion of the first leveling plate, wherein the second leveling plate is a suspension arm protruding rearward from the main frame. A suspension rod and a coil spring that supports the suspension rod so that the suspension rod can be moved up and down.
Of the ground leveling plate of the second landscaping plate is protruded rearward in the left-right direction middle part of the grounding plate, and the connection piece is projected in the left-right direction middle part of the rake. A shaft is rotatably supported in a vertical direction, and a sensing unit for sensing the vertical movement of the second ground leveling plate and operating the sensor is rotatably supported on the support shaft. Land leveling equipment for agricultural work machines.