JPS597397Y2 - Knife support device for core soil crusher - Google Patents

Description

[Detailed description of the invention] The present invention relates to a knife support device for subsoiler first grade and core soil crushing machines, so that the knife will not be deformed even when the tractor tilts from side to side due to the ups and downs of the field. This is what I did.

Various types of core soil crushing machines are widely used for turning wet rice fields into dry fields, etc., and these core soil crushing machines usually have a knife placed in the center of the rear of the machine and a green metal attached to the lower end of the knife. During work, the machine frame is towed behind a tractor via a three-point linkage mechanism, and the knife is towed with the lower end of the jade metal deeply dug into the soil.

By the way, in this type of core soil crusher, because the jade metal at the lower end of the knife is dug deep into the soil of the field, as mentioned above, if the tractor is tilted to the left or right due to the undulations of the field, etc., the three points As the machine frame tries to tilt together with the tractor via the link mechanism, a strong bending force is applied to the knife, and if that force exceeds the bending elastic limit of the knife, the knife will bend from the middle into a dogleg shape. There was a problem with it bending.

The present invention solves these conventional problems, and its feature is that in a core soil crusher equipped with a green metal at the lower end of the knife, the knife can be moved back and forth with respect to the mechanism. The knife is provided with a pair of left and right elastic bodies that support the knife so as to be swingable from side to side about the axis of the direction, and elastically support the knife in a substantially vertical state.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
In the figures and FIG. 2, reference numeral 1 denotes a tractor having a pair of left and right rear wheels 2.

3 is a hydraulic system for lifting and lowering the work machine.

Reference numeral 4 denotes a three-point linkage mechanism, and a core soil crusher 5 is attached to the rear of the tractor 1 to be towed through the three-point linkage mechanism 4, and the core soil crusher 5 is movable up and down by a hydraulic device 3.

The core soil crushing machine 5 is equipped with a machine frame 6, a knife 7, a pear 8, a gauge wheel 9, etc., and the gauge wheel 9 can be adjusted up and down via supports 10 on the left and right horizontal rods at the front end of the machine frame 6. is supported by

As shown in FIGS. 3 to 5, the machine frame 6 is provided with a mounting base 11 at the center of its rear end.

The mounting base 11 includes a pair of left and right side walls 12.13, a rear wall 14 that connects the rear ends, and a front wall 15 that connects the middle of the side walls 12.13, and is surrounded by these. This space is a knife swinging space, and the knife 7 is inserted between the front wall 15 and the rear wall 14 so as to be slidable left and right.

The knife 7 has a blade part 7a formed at the front end of a support in the form of a band plate, and has a jade metal 8 at the lower end and a hanger 16 at the upper end.

A supporting shaft 18 in the front and rear direction fixed to the mounting base 11 is inserted into the hanging tool 16 via an inverted U-shaped mounting bracket 17 so as to be relatively movable. Therefore, the knife 7 is supported via the hanging tool 16. It is suspended by a shaft 18 so as to be able to swing left and right.

Further, the knife 7 is elastically supported from the left and right in a substantially vertical state by coil-shaped elastic bodies 19 and 20 interposed between the side walls 12 and 13 of the mounting base 11.

The elastic body 19 is supported between a recess 12a formed in the side wall 12 and a receiving ring 21 attached to the knife 7, and the elastic body 19 is supported between a receiving plate 22 and a receiving ring 23.

The receiving plate 22 is fixed to the inner end of the screw shaft 24, and is fitted inside the receiving cylinder body 26 inserted into the through hole 25 of the side wall portion 13 so as to be slidable left and right. It is screwed into a nut 27 welded to 26 so as to be adjustable, and is fixed by a lock nut 28.

Note that the receiving cylinder body 26 has an engaging edge 2 on the outer periphery of the inner end portion, which engages the side wall portion 13.
6a, and the screw shaft 24 has a square shaft portion 24a for a tool at its outer end.

The elastic bodies 19 and 20 are set smaller than the bending elastic limit of the knife 7.

In the above structure, as shown in FIGS. 1 and 2, when the tractor 1 is being worked with the lower end of the knife 7 deeply dug into the soil of the field, the tractor 1 may move left or right due to the ups and downs of the field, etc. When the knife 7 is tilted in the direction, the pair of left and right elastic bodies 19 and 20 expand and contract according to the direction of inclination, and the knife 7 is relatively tilted in the left and right direction around the support shaft 18.
can prevent bending.

When the tractor 1 returns to the horizontal position, the knife 7 automatically returns to its relative position due to the elastic force of the elastic body 19.20, and thereafter the posture is maintained by the elastic body 19.20, so work can be carried out as usual. be able to.

Note that if the receiving cylinder 26, receiving plate 22, screw shaft 24, etc. are used, assembly is easy even if the elastic bodies 19, 20 are strong.

In addition, as shown in FIG.
If adjustment mechanisms 29 such as No. 4 are provided symmetrically, the elastic force of the elastic bodies 19 and 20 can be arbitrarily adjusted according to field conditions and the like.

7 and 8 show two long holes 30, upper and lower, in the knife 7,
31, and each elongated hole 30, 31 is provided with a side wall portion 12.
The rods 32 and 33 suspended horizontally are inserted between the two rods 32 and 33, and the elastic bodies 19 and 20 are fitted onto the rods 32 and 33, respectively. It can prevent falling down.

Note that by attaching reinforcing plates 34 to both sides of the knife 7, a decrease in strength due to the elongated holes 30 and 31 can be prevented.

The support shaft 18 may be supported on both sides by the mounting bracket 17. If the knife 7 is to be adjusted up and down, the holding cylinder holding the knife 7 may be elastically supported in the same manner as described above.

As described in detail in the embodiments above, according to the present invention, the knife is made to be able to swing left and right about the axis in the front and back direction, and is elastically supported in a substantially vertical state by a pair of elastic bodies from the left and right sides. When the tractor is tilted, the knife is tilted relative to the other and its deformation can be prevented.

Furthermore, when the tractor returns to the horizontal position, the knife automatically returns to its relative position due to the elastic body, allowing the user to continue working.

[Brief explanation of drawings]

Fig. 1 is a side view showing the first embodiment of the present invention, Fig. 2 is a rear view of the same, Fig. 3 is an enlarged sectional view of the main parts, and Fig. 4 is a view taken along the line A-A in Fig. 3. Figure 5 is a view taken along line B-B in Figure 3;
FIG. 6 is a longitudinal sectional rear view of the main part showing the second embodiment, FIG. 7 is a sectional view showing the third embodiment, and FIG. 8 is a view taken along the line C--C in FIG. 7. 1... Tractor, 5... Core soil crusher,
6...Machine frame, 7...Knife, 8...
...Shokane, 11...Mounting stand, 18...
・Spindle, 19.20...Elastic body.

Claims (1)

[Scope of utility model registration request] In a core soil crushing machine equipped with a hammer at the lower end of the knife, the knife is supported so as to be swingable left and right around the axis in the front and back direction with respect to the machine, and the left and right supports that elastically support the knife in a substantially vertical state are used. A knife support device for a core crusher, characterized by comprising a pair of elastic bodies.