JPH0726896Y2 - A sled height adjusting device for a digging machine for potatoes, etc. - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a digger for potatoes or the like that is connected to a tractor or the like via a three-point link mechanism. When excavating the excavation ski body by adjusting the approach angle to the soil, the position of the sled body that supports the aircraft is automatically set to the same height as the ski body. It is about machines.

[Conventional technology]

Generally, a digging machine for potatoes, etc. is provided with a skid body for digging and a sled body supporting the machine body on a machine body connected to a tractor etc. through a three-point link mechanism, and as the machine body progresses It is known that a ski body that has entered the soil digs out potatoes and the like. The top link is expanded and contracted, and the aircraft is rocked up and down to adjust the angle of entry of the ski body into the soil, thereby making the digging depth deeper or shallower depending on the field conditions.

[Problems to be solved by the present invention] In order to smoothly dig potatoes with this type of digging machine, the ski body for digging and the sled body supporting the machine body are always at the same height. It is desirable that it is horizontal with respect to the field scene. So, when adjusting the approach angle of the ski body into the soil by expanding and contracting the top link,
The height of the sled body also needs to be adjusted at the same time according to the angle change of the ski body. However, since the height adjustment of the sled body is conventionally adjusted by the so-called "feeling" based on the experience of the operator,
There is a problem in that it is impossible to finely adjust the height due to a change in the approach angle of the ski body, so that the excavation work cannot be performed in a stable state.

The present invention was devised in order to solve these problems in view of the above-mentioned circumstances, and when the aircraft is rocked by the expansion and contraction of the top link to adjust the approach angle of the ski body into the soil, The sled body provided at the rear of the ski body automatically moves up and down to have the same horizontal height as the ski body to support the rocking machine body, so that the digging work can always be performed in a stable state. The object of the present invention is to provide a digging machine for potatoes and the like.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the technical means taken by the present invention is to dig a machine body connected to a tractor or the like through a three-point link mechanism by swinging the top link up and down to dig the machine body. In a digging machine for potatoes or the like, which adjusts the approach angle of the ski body for removal into the soil, a sled body for supporting the machine body is provided rearward of the ski body and the sled body is slidable. Is connected to the top link via an interlocking mechanism, and the sled body that moves up and down in conjunction with the adjustment of the ski body by the expansion and contraction of the top link is at the same height as the ski body and supports the rocking aircraft It is characterized by having done.

[Function of device]

Therefore, according to the present invention, when the top link of the three-point link mechanism connecting the airframe to the tractor or the like is expanded and contracted, the airframe swings up and down to adjust the approach angle of the excavation ski into the soil. Therefore, it is possible to dig potatoes and the like by the ski body that has entered the appropriate depth corresponding to the field conditions as the machine body travels.

Then, when adjusting the approach angle of the ski body to the soil, the sled body connected to the top link via the interlocking mechanism moves up and down in conjunction with the expansion and contraction of the top link, and becomes the same height as the ski body. Since the rocking body is supported, the ski body and the sled body are always horizontal with respect to the ground, and the potatoes can be dug out in a stable state.

〔Example〕

Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
1 is a tractor, 2 is a digger for potatoes or the like connected to the tractor 1, and a mast 6 for connecting an upper arm 4 and a lower arm 5 mounted on a body 3 of the digger 2 The upper end side is connected to the top link 8 of the three-point link mechanism 7. A turnbuckle 9 is provided in the middle of the top link 8, and the top link 8 can be expanded and contracted by rotating the turnbuckle 9. The lower arm 5 is connected to a lower link 10 of a three-point link mechanism 7, and the lower link 10 is connected to a lift arm 11 of a hydraulic system via a lift rod 12, and the excavator 2 is operated by the operation of the hydraulic system. It can be raised and lowered. Further, a manual control switch 13 of the hydraulic device is provided on the upper portion of the machine body 3.

Reference numeral 14 denotes a digging ski body provided in a front portion of the machine body 3 and projecting obliquely downward and forward, and 15 denotes a sled body supporting the machine body 3 provided behind the ski body 14, With the progress, the ski body 14 enters the soil and the potatoes a can be dug out. If the top link 8 is expanded and contracted by operating the turnbuckle 9, the machine body 3 swings up and down, and the approach angle of the ski body 14 into the soil can be adjusted to an appropriate angle corresponding to the field condition. it can.

On the other hand, the sled body 15 has a front end pivotally supported by a fulcrum 16 of the machine body 3, and a pillar 17 provided on the rear end side supported by a holder 18 provided on the machine body 3 side so as to be vertically movable. And above the pillar 17
And the top link 8 is connected to the top link 8 through an interlocking mechanism 19. That is, the inner wire that constitutes the connecting wire.
One end of 20 is fixed to the upper end of the pillar 17, and the other end is a boss portion 22 interposed between the turnbuckle 9 and the lock nut 21.
It is fixed to. Further, one end of the outer 23 is fixed to an outer receiver 24 provided on the machine body 3, and the other end is fixed to a mounting pin 25 that connects the top link 8 and the mast 6 together with the expansion and contraction of the top link 8. The sled body 15 moves up and down so that it is always at the same height as the ski body 14. The mounting pin 25 is a stepped outer cylinder pin 26 as shown in FIG.
And an inner cylinder pin 28 provided with an outer holder 27, and has a double structure, and a retaining ring 30 is locked in a groove 29 provided in the inner cylinder pin 28 to prevent the retainer from coming off. Therefore, even if the top link 8 is expanded or contracted, the inner cylinder pin 28 freely rotates within the outer cylinder pin 26, so that the connecting wire is not broken due to an excessive force.

31 is a roller rolling along the upper surface of the ridge,
The roller 31 is pivotally supported at the tip of a vertically rotatable stay 32 pivotally supported by the side plate 3a of the machine body 3, and a pointer 33 is provided at the pivotal support portion of the stay 32 to provide the side plate 3a. If you visually check the position 34 indicated by the pointer 33 on the scale attached to the
It is possible to know whether or not the working depth is appropriate from the amount of rotation of.

Reference numeral 35 is a set bolt, 36 is a connecting portion of the PTO shaft, and 37 is a carrier for carrying and discharging the dug potatoes a.

If the tractor 1 is made to run along the ridge in the above-mentioned configuration, the ski body 14 that has entered the soil digs the potatoes a, and the conveyor body 37 conveys the excavated potatoes backward. To release. At this time, if the approaching angle of the ski body 14 is not proper, if the turnbuckle 9 is rotated and the top link 8 is expanded / contracted, the machine body 3 swings up and down.
The entry angle of 14 into the soil can be freely adjusted to a desired angle according to the field conditions. When the top link 8 is contracted, the body 3 swings downward and the
Although the approach angle of 14 is large, the inner body 20 is pushed in the direction of arrow a at this time, so that the sled body 15 moves downward around the fulcrum 16 and becomes flush with the ski body 14. Further, if the top link 8 is extended, the body 3 swings upward and the approach angle of the ski body 14 becomes small. At this time, the inner body 20 is pulled in the direction of the arrow b to move the sled body 15 upward, and the sled body 15 moves upward. Since 15 automatically becomes the same height as the ski body 14 and supports the rocking body 3, the ski body 14
The sled body 15 and the sled body 15 are always horizontal with respect to the ground so that the digging work can be performed smoothly. Moreover, the outer holder
Since the inner cylinder pin 28 provided with 27 freely rotates inside the outer cylinder pin 26, even if the top link 8 is expanded or contracted, the connecting wire will not be broken due to an excessive force.

On the other hand, the operator near the digging machine can immediately know the working depth only by visually observing the position indicated by the pointer 33 of the scale 34 attached to the side plate 3a. Operate the control switch 13 to turn the aircraft 3
By raising and lowering, the digging work can always be performed with an appropriate working depth.

[Effect of device]

In short, the present invention swings the airframe connected to the tractor etc. through the three-point link mechanism up and down by the expansion and contraction of the top link, and the entry angle of the excavation ski body provided in the airframe into the soil. In a digging machine for potatoes, etc., which is adjusted, a sled body that supports the machine body is provided in the rear of the ski body so as to be vertically movable, and the sled body is connected to a top link through an interlocking mechanism. Then, because the sled body that moves up and down in conjunction with the adjustment of the ski body by the expansion and contraction of the top link is at the same height as the ski body to support the rocking body, the top link expands and contracts to swing the machine body. When adjusting the angle of entry of the ski body into the soil, the sled body connected to the top link via the interlocking mechanism automatically becomes the same height as the ski body in conjunction with the adjustment of the ski body. Support the rocking body The operator does not need to adjust the sled body one by one as in the past, and the ski body and sled body are automatically horizontal with respect to the ground so that the digging work of potatoes etc. is always stable. It can be done smoothly.

[Brief description of drawings]

The drawings show one embodiment of the sled height adjusting device in a digging machine for potatoes according to the present invention. Fig. 1 is an overall side view, Fig. 2 is an enlarged view of a main part, and 3 The drawing is an enlarged hypotenuse view of the connecting pin, and FIG. 4 is a view on arrow A of FIG. In the figure, 3 ... machine, 7 ... three-point link mechanism, 8 ... top link, 14 ... ski body, 15 ... sled body, 19 ... coupling mechanism.

Claims (1)

[Scope of utility model registration request] 1. An airframe connected to a tractor or the like via a three-point link mechanism is vertically swung by expansion and contraction of a top link to adjust an approach angle of the excavation ski body provided in the airframe into the soil. In the digging machine for potatoes and the like, a sled body supporting the body is provided in the rear of the ski body so as to be vertically movable, and the sled body is connected to a top link via an interlocking mechanism. , A digging machine for potatoes or the like, characterized in that the sled body that moves up and down in conjunction with the adjustment of the ski body by the expansion and contraction of the top link has the same height as the ski body to support the rocking machine body. Sled height adjustment device in.