JPH018096Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an excavator used for digging up agricultural crops.

A digging blade that is inserted into the ground is vibrated back and forth to dig up crops underground, and a screen-type sieving device installed behind the digging blade sifts out the soil that adheres to the dug crops. A vibrating excavator is in practical use. Such conventional vibrating excavators were generally configured to use the vibration of the excavating blade to vibrate the sieving device up and down in order to improve the sieving effect. It could not be used for digging work for crops where it is not desirable to sift the soil.

This invention was created in view of the above circumstances, and provides an excavator that can be used both when it is desired to thoroughly sift off soil and when it is not desirable to sift off soil. Explain.

The digging machine according to this invention has a digging section in which a digging blade inserted into the ground is supported by a support that is pivotally connected to the machine frame, and a digging unit that supports the digging blade inserted into the ground through the support by swinging the support back and forth. The digging machine is equipped with a vibration device that vibrates a digging blade back and forth, and a sieving device disposed at the rear of the digging section, the front end of the sieving device being placed at the rear of the digging section. A support rod is provided that is pivotally attached to the sieve device so as to be freely rotatable in the vertical direction, and that lifts the sieve device at a position away from the rotational fulcrum, and the upper end of the support rod is selectively attached to the machine frame or support. It is characterized by Embodiments of the present invention shown in the drawings will be described below.

FIG. 1 is a side view showing an example of an excavator according to this invention, and FIG. 2 is a partially omitted plan view thereof. The illustrated excavator 1 has a mast 3 at the front end of a machine frame 2, and a top link 4 of a powered agricultural machine (not shown) is connected to the upper part of the mast 3. The lower end of the mast 3 serves as a hanging member 5, to which a lower link 6 of a powered agricultural machine is attached. The excavator 1 is towed in the direction of arrow A by the top link 4 and lower link 6.

A swinging arm 7 is pivotally attached to the machine frame 2 by a support shaft 71, and a support 9 for supporting a digging blade 8 is attached to a horizontal bar 7a provided at the rear end of the swinging arm 7. There is. These digging blades 8 and pillars 9 constitute a digging section. Since the front part of the swinging arm 7 is supported along the machine frame 2, a fairly wide space is formed above the digging blade 8, making it difficult for plant stems to get entangled with the swinging arm. It's summery.

A mounting plate 19 is provided on the lower front side of the machine frame 2, and bearing bodies 21, 21' for supporting the input shaft 20 are attached to this. Input shaft 20
An eccentric shaft portion 20a is provided in the middle of the shaft, and an eccentric wheel 22 is attached to this portion via a bearing 22a. The eccentric ring 22 has a spherical outer peripheral surface and is fitted into the mounting hole 23a of the swing plate 23. Further, a spherical bearing 7b for supporting the front end of the swing arm 7 is fitted into a second mounting hole 23b provided in the upper part of the swing plate 23. The input shaft 20 is the PTO of the power agricultural machine.
Shafts (not shown) are connected via a universal joint to transmit rotational power, but this rotational power is converted into a rocking motion that swings the rocking plate 23 up and down by the action of the eccentric wheel 22. , spherical bearing 7
The swing arm 7 is caused to swing via b. The swinging motion of the swinging arm 7 is transmitted to the support 9, and the digging blade 8
is caused to vibrate in the direction of arrow B. That is,
The eccentric wheel 22, the swing plate 23, the spherical bearing 7b, and the swing arm 7 function as a vibration device for vibrating the digging blade. The input shaft 20 may be provided on the upper surface side of the machine frame 2, as shown by the chain line in FIG.

A vertical member 10 is provided at the rear end of the machine frame 2, and the vertical member 10 and the mast 3 are connected by a reinforcing member 11. A pipe 12 is provided horizontally at the lower end of the vertical member 10, and connecting plates 13 are fixed to both ends of the pipe 12.

Next, a grid-shaped sieving device 15 is disposed behind the digging blade 8. Sieving device 15
As shown in FIG. 4, there is a base shaft 15a and a plurality of lattice bars 15b planted in parallel thereto.
Both ends of the base shaft 15a are supported by bearings 18 attached to the protruding plate 17 of the support column 9. The base shaft 15a is also provided with a connecting metal fitting 15c, and this connecting metal fitting 15c and a connecting plate 13 fixed to a pipe 12 provided on the vertical member 10 are connected by a support rod 14. The upper end of the support rod 14 is rotatably attached to the connecting plate 13 by a pin 14a, and
The lower end of 4 is connected to a connecting fitting 15c by a pin 14b.
It is pivoted to. That is, the sieving device 15 is held suspended by the support rods 14. The connecting plate 13 is fixed to the machine frame 2 via the pipe 12 and the vertical member 10, and the length of the support rod 14 is kept constant, so if the support rod 9 is vibrated back and forth in this state, When the digging blade 8 moves forward, the sieving device 15 rotates upward,
When the digging blade 8 retreats, the sieving device 15 rotates downward. In this case, since the amount of rearward protrusion of the connecting fittings 15c is small, the sieving device is lifted at a position where the support rod 14 is close to the support of the base shaft 15a, which is the rotation fulcrum of the sieving device, and the swinging width of the column is Even if the amount of rotation of the sieving device is not that large, the amount of rotation of the sieving device becomes large. Since the sieving device vibrates up and down in this manner, the crop soil that is dug up by the digging blades and passing over the sieving device 15 is effectively screened out. In the illustrated example, the connecting plate 13 is provided with two pin holes 13a and 13b, and the support rod 14 can be selectively attached to either of these pin holes, so the pin hole can be changed. This allows the support angle of the sieving device to be varied.

Further, the support 9 of the excavator 1 is provided with a pin hole 9a to which the upper end of the support rod 14 can be pinned. Figures 3 and 5
The figures show the support rod 14 attached to this pin hole 9a, and the upper end of the support rod 14 is not attached to the connecting plate 13 fixed to the machine frame 2, as shown in these figures. like pillar 9
By attaching the sieving device to the column,
It forms a body and vibrates back and forth along with the pillar, but it is possible to prevent it from vibrating significantly in the vertical direction. This prevents the crops from being damaged and also prevents a large amount of soil from being sifted off from the dug-out crops, so it can be used when digging crops where you do not want to sift off the soil. You will be able to do this. Support rod 1
The functions of the sieving device can be changed in this way by simply changing the pinned location at the upper end of the sieving device 4, making it easy to change over and extremely convenient in practice.

Although the sieving device in the illustrated example is connected to the support column, it may also be connected to the rear part of the digging blade. The illustrated support rod 14 is composed of a cylindrical portion 14d and a shaft portion 14e that fits into the cylindrical portion 14d, and the length of the fitting can be adjusted with a nut 14c. like,
It is convenient to provide a length adjustment means that can adjust the length of the support rod 14, since the posture of the sieving device can be easily adjusted.

As explained above, the excavator according to the present invention suspends the sieve device pivotally attached to the rear part of the excavation part by connecting the upper end of the support rod to the machine frame on the fixed side. It is possible to increase the vibration in the vertical direction of the support rod 1.
By connecting the upper end to the support, the vertical movement of the sieving device can be reduced, making it possible to use it both when you want to sift out crop soil and when you don't want to sift it out.

[Brief explanation of the drawing]

Figure 1 is a side view of the excavator according to this invention.
FIG. 2 is a partially omitted plan view, FIG. 3 is a side view of the main part, and FIGS. 4 and 5 are rear views of the main part. 1... Excavator, 2... Machine frame, 3... Mast,
7... Swinging arm, 8... Digging blade, 9... Support, 9a... Pin hole, 13... Connection plate, 13
a, 13b...Pin hole, 14...Support rod, 1
5... Sieving device, 15a... Base shaft, 15b...
Lattice rod, 15c...Connecting metal fittings.

Claims (1)

[Scope of utility model registration request] An excavation part formed by supporting a digging blade inserted into the ground with a support that is pivotally connected to the machine frame, and by swinging the support back and forth, the digging blade is vibrated back and forth through the support. An excavator comprising a vibrating device and a sieving device disposed at the rear of the excavating section, the front end of the sieving device being pivotably pivoted to the rear of the excavating section in the vertical direction. An excavator characterized in that a support rod for hoisting the sieve device is provided at a position apart from the rotation fulcrum, and the upper end of the support rod can be selectively attached to a machine frame or a support.