JPH052970Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application This invention mainly relates to a tooth mounting structure used in a reversing rotary tiller.

(b) Prior Art Some reversing rotary tillers attempt to improve soil crushability by attaching a plurality of rods in a comb-like shape to the front of the rear cover.

(c) Problems that the device is trying to solve Such teeth have the disadvantage that they are easily deformed when hit by lumps of soil thrown backward by the tilling claws that rotate in reverse during tilling. For this reason, some attempts have been made to make the rods themselves out of elastic material so that they can withstand some impact, and to absorb the impact by attaching four or five rods to band plates on the back of a base plate that is roughly the same as the tilling width in order to facilitate replacement work in the event of damage. However, when a lump of soil or a stone hits a rod near the base plate to which the rods are attached, the base plate itself deforms significantly, making it difficult to attach the rod unit, which is divided into several sets, to the base plate.

(d) Means for solving the problems Therefore, this invention is proposed in view of the above-mentioned problems, and is a rotary tilling device that has excellent deformation prevention function and also allows for easy tooth replacement. We aim to provide the following.

For this reason, this invention has taken the following technical measures.

That is, the main cover 5 of the rotary tillage device 1
A rear cover 7 is rotatably pivoted to the rear of the plowing section, and a tooth body 10 having a plurality of rods 11 is vertically disposed between the rear cover 7 and the tilling section. 12, a plurality of strip plates 19 fixed to the strip plates 19, and rods 11 fixed to the strip plates 19, and plate-shaped stoppers 25 are provided on the upper surface of the substrate 12 at intervals in the left and right directions. The rotary tilling device is characterized in that the stopper 25 is fixedly provided, and the stopper 25 is brought into contact with the rotational hinge part 26 of the rear cover 7 to prevent the tooth body 10 from moving upward beyond a certain angle.

(E) Embodiments and their effects Hereinafter, embodiments of this invention will be described based on the drawings.

First, to explain the configuration, reference numeral 1 is a rotary tillage device, which has an input shaft 2, a tilling shaft 3, a tilling claw 4...
The upper part of the tilling section is covered with a main cover 5, and a front cover 6 and a rear cover 7 are pivotally attached to the front and rear of the main cover 5, respectively. A well-known clutch mechanism is provided in a gear case 8 that rotatably supports the input shaft 2, and by switching a lever 9 protruding from the gear case 8 from side to side, the tilling shaft 3 can be rotated forward (down cut). ) or reverse rotation.
The tooth body 10 whose axis coincides with the center of rotation of the rear cover 7 includes a plurality of elastic rods 11...
is attached to a base plate 12 having a width approximately equal to the width of the rear cover 7, and two levers 13, 13 protruding upward from the top surface of this base plate 12 are pushed down in the front and back direction, and the middle part of the levers 13, 13 is The tips of the pivotally supported L-shaped rods 14, 14 are alternatively inserted into the through holes 16 of the plate 15 fixed to the rear of the main cover 5 or the through holes 18 of the plate 17 fixed to the upper surface of the rear cover 7. As a result, the tooth body 10 is configured to be switched between a state in which it is used in reverse rotation, in which it is fixed to the main cover 5, and a state in which it is used in normal rotation, in which it moves up and down together with the rear cover 7.

The rods 11 are each fixed to a plurality of divided strip plates 19, and these strip plates 19 are fixed to the back side of the substrate 12 by tightening bolts. Next, based on FIGS. 4 and 5, a description will be given of the structure of the rotation shaft portion that pivotally connects the tooth body 10 and the rear cover 7.

20 is a rectangular piece with cylindrical pins 21 at both ends,
21, and a screw hole (not shown in the drawing) is provided on the upper surface of the piece 20. A bolt 23 is inserted from above into a pipe 22 fixed to the vertical surface of the rear end of the main cover 5, and the bolt 23 is inserted into the screw hole. By tightening, the rear cover 7 is attached to the main cover 5. 24 is a U-shaped bracket rotatably inserted through the pins 21, 21;
The lower part of the lever 13 is welded to the upper surface of the bracket 24, and the lower part of the bracket 24 is integrally fixed to the base plate 12. A piece 20 is similarly interposed in the middle part of this U-shaped bracket 24, and this piece 20 is attached to the main cover 5.

Reference numeral 25 is a plate-shaped stopper fixed on the base plate 12 at appropriate intervals in the left and right lateral directions, and the front upper part of the stopper is in contact with a collar 27 interposed in the rotating hinge part 26 to stop the tooth body. It is configured to prevent upward movement beyond a predetermined angle of 10.

In addition, the code 28 in the figure is a tractor (drawing omitted)
a mast for connecting this rotary tillage device 1 to, 29 a gauge wheel, 30 a chain case, 3
1 is a slide hitch, and 32 is a notch in the rear cover 7.

In the above example, when performing tilling work while reversing the tilling shaft 3, the rods 14, 14 of the levers 13, 13 are moved to the main cover 5 as shown in FIG.
The tooth body 10 is fixed to the main cover 5 by hooking it onto the through holes 16, 16 of the rear plates 15, 15. If you perform tillage work while moving the machine forward in this state, the finely crushed soil will be removed by tooth body 10.
The soil passes through the rods 11 that make up the soil, and becomes the upper layer of soil, and the large lumps of soil become the lower layer of soil and are piled up, creating a ridge suitable for a seed bed. In this case, even if a large lump of soil hits the lower part of the rod 11, it will not be significantly deformed because it has elasticity.
However, if a lump of soil or stone that cannot withstand this elasticity hits, or if a large lump of stone hits the top of the rod 11..., the substrate 12 itself to which the rod 11... is attached will be twisted. However, since an appropriate number of stoppers 25 are provided on the upper part of the base plate 12 facing the pivot hinge part 26, the deformation of the base plate 12 can be suppressed.

(f) Effects of the invention Since this invention is constructed as described above, it has the following technical effects. That is, the tooth body 10 is made up of one substrate 12, a plurality of strip plates 19 fixed to this,
A plate-shaped stopper 25 is fixedly provided on the upper surface of the base plate 12 at intervals in the left and right directions, and this stopper 25 is attached to the pivoting hinge portion of the rear cover 7. 26 to prevent the tooth body 10 from moving upward by more than a certain angle, some of the rods 11
When the rod 11 is deformed, it is only necessary to replace a part of the strip 19 without replacing the entire board 12, and as a result, the work of replacing the rod 11 becomes easier.

In addition, plate-shaped stoppers 25 are fixed at intervals on the left and right sides of the top surface of the board 12 to which the rods 11 are attached, so that they have a reinforcing function and suppress deformation of the board 12. be able to.

In addition, the stopper 25 is configured to abut against the rotating hinge portion 26 of the rear cover 7 to prevent the tooth body 10 from moving upward, so there is no risk that the stopper 25 will get in the way during work or be lost. , the number of parts is small and the configuration is simple.

[Brief explanation of the drawing]

The figures show an embodiment of this invention; Fig. 1 is a side view, Fig. 2 is a rear view, Fig. 3 is a plan view, Fig. 4 is a perspective view of the main part, and Fig. 5 is a partially cutaway view. FIG. 3 is a perspective view of main parts. Explanation of symbols, 1...Rotary tillage device, 2...
...Input shaft, 5...Main cover, 6...Front cover, 7...Rear cover, 10...Tooth body,
11...rod, 12...board, 25...stopper.

Claims (1)

[Scope of utility model registration request] The rotary tillage device 1 has a rear cover 7 rotatably attached to the rear of the main cover 5, and a tooth body 10 having a plurality of rods 11 is vertically disposed between the rear cover 7 and the tilling section. The tooth body 10 is composed of a single substrate 12, a plurality of strip plates 19 fixed to the substrate, and a rod 11 fixed to the strip plates 19. Open the plate-shaped stopper 2
5 is fixedly provided, and the stopper 25 is brought into contact with the rotating hinge portion 26 of the rear cover 7 to prevent the tooth body 10 from moving upward beyond a certain angle.