JPS6230906Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a digging device for easily harvesting crops, such as onions, formed in the soil.

Conventionally, a digging device is attached to the rear of an agricultural traveling machine, and the thrust of the traveling machine is used to cause a digging plate at the front of the digging section provided on the machine frame to enter the ground and move forward. Crops were dug up from the ground using a sieve, and the crops and soil were sieved using a sieve installed behind the digging plate. Here, the sieve part has round rods that protrude rearward from the rear end of the digging plate and are arranged in rows substantially parallel to each other in the lateral direction.

However, since the excavation work is performed while the excavation section is fixed to the traveling machine body, the resistance of the digging plate to digging up the soil is large, which places an excessive load on the traveling machine body and damages the machine frame and excavation section. It was necessary to make the parts strong. In addition, the sieve section has been found to become clogged due to continuous excavation work and lose its function as a sieve. Furthermore, since the excavation equipment was attached to the rear of the traveling aircraft, it was difficult for the operator of the traveling aircraft to grasp the status of the excavation work, which hindered the proper execution of the excavation work at all times. It was seen.

In order to solve the above problems, a digging section was installed in front of the traveling machine ("mechanized agriculture" in the Showa era).
September 1940 issue, published by Shinnorinsha Co., Ltd. P30-33),
and one that vibrates the excavation part (Jikkotsu 44-
17155) is already publicly known.

However, the former has a complicated device for attaching the digging device to the traveling aircraft, and the latter has a structure in which the digging section vibrates relative to the fixed machine frame, so the rigidity of the digging section is low. It was inferior to

Therefore, the purpose of the present invention is to provide an excavation device that has an extremely simple structure and can be easily attached to a tractor without modifying the conventional tractor, and has an increased rigidity of the excavation part. .

Therefore, the feature of the present invention is that a pair of left and right front loader arms 3 are attached to the tractor body 1, and a scooping part 11 is provided at the tip of the arm 3 to removably attach a loader bucket. A machine frame 13 of the digging device is detachably and rotatably supported on the scooping part 11, a digging part 12 is fixed to the machine frame 13, and the arm 3 has an actuator for vibrating the machine frame 13. A vibration means 29 is attached, and the vibration generating means 29 and the machine frame 13 are interlocked and connected via a vibration rod 34, so that the machine frame 13 rotates around the scooping part 11 and vibrates, and the arm 3 A gauge body 39 is provided in which the relative height between the excavation part 12 and the ground can be adjusted and maintained.

The present invention will be described in detail below with reference to the illustrated embodiment. The figure shows a case where the digging device 4 of the present invention is applied to the tip of an arm 3 of a front loader 2 installed at the front of an agricultural tractor body, which is a traveling body 1. 5 and 6 are the front wheels and rear wheels of the traveling aircraft 1. The front loader 2 is mounted on a mounting bracket 7 erected on the side surface of the intermediate portion of the traveling body 1, as is conventionally known.
, an auxiliary frame 8 erected on the top of the bracket 7, a main frame 9 installed between the auxiliary frame 8 and the front side of the traveling body 1, and a traveling body 1 pivotally supported on the top of the auxiliary frame 8. a pair of left and right arms 3 that extend in front of the arm and are vertically swingable;
A lift cylinder 10 whose one end is pivotally supported by the lower end of the auxiliary frame 8 to drive the arm 3, and a bucket which is pivotally supported by a scooping part 11 provided at the tip of the arm 3. In the illustrated example, the machine frame 13 to which the excavation part 12 is attached is attached to the arm 3 instead of the bucket.
It is rotatably supported on a scooping part 11 at the tip.

The machine frame 13 has a pair of left and right vertical rods 15 to which a horizontal pivot shaft 14, which is pivotally supported by the scooping portion 11, is attached to the lower end.
, a horizontal rod 16 provided rearwardly from the vertical rod 15, a horizontally rectangular cross-sectional tool bar 17 installed at the rear end of the horizontal rod 16, and a tool bar 17 erected in the center of the tool bar 17 at the upper end. A second vertical rod 19 provided with a mounting hole 18, and a support rod 20 for the excavated portion 12, which is removably attached to the tool bar 17 and is installed at a slightly backward angle.
and a reinforcing rod 21 that connects the upper end of the vertical rod 15 and the middle part of the second vertical rod 19. In the illustrated example, the pivot shafts 14 are provided horizontally protruding from both left and right sides of each vertical rod 15, and the outward pivot shafts 2 are provided to protrude outward.
2 is shaped to be pivotally supported by the scooping part 11 of the arm 3, and an inward pivot shaft 2 is provided that projects inward.
3 is shaped to be pivotally supported by a rear end bearing of a three-point link lower link attached to the rear of an agricultural tractor. Further, a tool bar 17 having a rectangular cross section can be freely fitted into and removed from the front surface of the upper end of the support rod 20, and a bolt 24 is provided.
A cylindrical body 25 that can be fixed freely is provided via a bolt 26, and the excavated portion 12 is attached to the bottom end of the cylinder 25 via a bolt 26.
A through hole 28 is provided for fixing at 7. Reference numeral 29 is a vibration excitation means, which includes a hydraulic motor 31 driven by a hydraulic pump 30 mounted on an agricultural tractor, an eccentric shaft 32 driven by the motor 31, and an eccentric shaft 32 and the second vertical shaft. A vibrating rod 34 with a turnbuckle 33 connected to the mounting hole 18 of the rod 19 is provided, and the machine frame 13 is vibrated about the pivot shaft 14 by the operation of a hydraulic motor 31.

The digging part 12 is composed of a digging plate 35 and a sieve part 36, and in the illustrated example, the digging plate 35 is a horizontal strip plate that is gradually bent upward as it advances toward the end to form a flat U-shape.
In addition, the front edge 37 is bent forward and downward relative to the ground, and is bent so as to gradually retreat toward the center. In addition, the sieve part 36 has one end of a round bar 38 fixed to the lower surface of the digging plate 35 at approximately equal intervals, and the other end extends rearward and upward in parallel, and gradually extends rearward as it approaches both ends. .

Reference numeral 39 denotes a gauge body including a gauge ring 41 rotatable around a horizontal axis 40 and a horizontal axis 40 of the gauge ring 41.
a gauge rod 44 supported at its lower end, whose upper end is bent rearward to form a horizontal rod portion 42, and whose rear end is pivotally supported by the front portion of a protruding piece 43 attached to the lower surface of the arm 3;
A bucket bag or the like is provided with a connecting body 46 which pivotally supports the horizontal rod part 42 and the rear part of the protruding piece 43, and whose upper part projects above the upper surface of the arm 3 and has a connecting hole 45, and which is pivotally supported on the front end of the arm 3. The rod 47 end of the actuating cylinder 48 and the connecting body 46 are actuated to rotate the rod 47, and the rod 47 can move forward and backward in the front and rear directions.
The upper part of the gauge wheel 41 is pivotally supported through a connecting hole 45, and the gauge wheel 41 can be vertically adjusted and fixed by the operation of an operating cylinder 48.

Next, the operation of the digging device 4 according to the configuration of the above embodiment will be explained. First, the arm 3 is positioned upward by the lift cylinder 10, and the operating cylinder 48
By moving the rod 47 of the working cylinder 48 in and out, the gauge wheel 41 is raised and lowered to adjust an appropriate relative height between the excavation part 12 and the ground, and by fixing the movement of the rod 47 of the operating cylinder 48, The above relative height dimension is maintained. After that, the hydraulic motor 31 is operated, and the excavation part 12 is moved through the machine frame 13.
While vibrating the excavation plate 35, the arm 3
When the excavation plate 35 is lowered, the excavation plate 35 enters the ground and maintains the relative height between the excavation portion 12 and the ground. In this case, it is free to adjust the relative height dimension again to an appropriate dimension by changing the position of the gauge wheel 41. When the traveling body 1 is moved forward in this state, the front part of the excavation part 12 is moved by the vibration excitation means 2.
It moves forward beneath the surface of the earth while being vibrated by 9. The crops and soil that are successively dug and pushed up onto the top surface of the digging plate 35 then proceed to the sieve section 36 which gradually separates from the ground as it moves backward, and the soil passes through the sieve section 36 and falls. The crops are sequentially dropped from the rear end of the sieve section 36 onto the soil where the excavation work has been completed at the rear of the excavation section 12. In this case, as in the above structure, the digging part 12 is bent so as to gradually retreat as it moves toward the center of the digging plate 35, and both ends are bent upward together with the sieve part 36. Since the rear end of 36 is extended rearward as it approaches both ends, the crops dug across the entire front edge of the digging part 12 move relatively toward the rear of the digging part 12, as shown by the arrows in FIG. The excavation part 1 is moved to the center as
At the rear of No. 2, they are gradually gathered closer to the center of the traveling body 1. This configuration is advantageous because there is no problem of stepping on the harvested crops with the front wheels 5 and rear wheels 6 of the traveling machine.

In addition, as shown in FIG.
In addition, the hydraulic motor 31 is provided with a solenoid valve 51, respectively.
The oil under pressure from the hydraulic pump 30 is distributed, and the return pipe 54 from the oil supply outlet pipe 52 of the hydraulic pump 30 and the solenoid valves 49, 50 to the hydraulic tank 53
are provided with relief valves 55 and 56, respectively. And the solenoid valve 4 of each cylinder 10, 48
9 and 50 are piped in parallel, and the hydraulic motor 31
The solenoid valve 51 is piped in series with the solenoid valves 49 and 50.

Next, the operation of the above configuration will be explained. In the above configuration, raising and lowering the arm 3 and operating the gauge body 39,
When moving the gauge wheel 41 up and down, the hydraulic motor 31 always rotates and the digging part 12 vibrates.
This is preferable because the front part of the digging part 12 can smoothly enter and exit the ground. Although not shown, once the gauge body 39 is properly set, the lift cylinder 10 is released from the fixation, and a hydraulic circuit is provided to set the arm 3 in a floating state.
It is more preferable that the relative height between the ground and the ground can be kept constant during the excavation work.

Note that in the above configuration, instead of the sieve part 36, the fifth
As shown in the figure, a conveyor 57 for conveying the excavated crops may be provided behind the excavation section 12. The conveyor 57 has a pair of front and rear horizontal support shafts 58 and 59 that are rotatably supported around an axis by a support frame;
A pair of left and right sprockets 60, 61 fixed to both ends of each of the horizontal support shafts 58, 59, a pair of left and right chains 62 suspended between the front and rear corresponding sprockets 60, 61, and a chain 62 between the left and right chains 62. and a crop mounting surface on which horizontal rods are arranged in rows at predetermined intervals in the rotating direction.

According to this configuration, the work of transporting the crops to the rear can be carried out more smoothly, and the function of sifting the crops and soil becomes more effective by making the conveyor 57 longer.

In addition, when the excavation part 12 is attached to the rear of the traveling body 1, for example, an agricultural tractor, the inward pivot shaft 23 of the machine frame 13 is attached to the rear end bearing of the lower link of the three-point link attached to the rear of the agricultural tractor. to separate the cylinder body 25 at the upper end of the support rod 20 from the tool bar 17 by loosening the bolt 24;
The support rod 20 and the digging part 12 are separated by loosening the bolts 27, and the cylinder 25 is fitted to the tool bar 17 in the horizontal direction opposite to the above, so that the digging plate 35 is in front of the ground. The support rod 20 and the excavated portion 12 are connected again so as to be directed downward. Further, by pivotally supporting the attachment hole 18 of the second vertical rod 19 and the rear end of the top link of the three-point link, the excavation part 12 can be attached to the rear of the traveling body 1. In this case, a vibrating means for vibrating the second vertical rod 19 through the attachment hole 18 may be provided in place of the top link.

According to the present invention, the structure is simple, the rigidity is high, and it is extremely easy to attach to a tractor, so that it has many practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view when the present invention is applied to an agricultural tractor, FIG. 2 is a perspective view of the main part of the present invention, and FIG. 3 is a side view of the excavation part. FIG. 4 is a plan view of the same, and FIG. 5 is a simplified side view showing another embodiment of the present invention. 1... Traveling body, 13... Arm, 4... Excavation device, 12... Excavation section, 13... Machine frame, 29...
Vibrating means, 35...Drilling plate, 37... Leading edge, 39
...Gauge body.

Claims (1)

[Scope of utility model registration request] A pair of left and right front loader arms 3 are attached to the tractor body 1, and a scooping part 11 is provided at the tip of the arm 3 to removably attach a loader bucket. is detachably and rotatably supported, a digging part 12 is fixed to the machine frame 13, and the machine frame 13 is fixed to the arm 3.
The vibration excitation means 29 and the machine frame 13 are interlocked and connected via the vibration rod 34, so that the machine frame 13 rotates around the scooping part 11 and vibrates. An excavation device characterized in that the arm 3 is provided with a gauge body 39 that allows the relative height of the excavation part 12 and the ground to be adjusted and maintained.