JPS6239603Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tilling claw that can be used in both forward and reverse directions.In addition to improving the strength of the tilling claw, it also reduces the driving resistance of the tilling claw against the soil in both forward and reverse operations, thereby reducing the required power. The aim is to reduce

Some rotary tillage devices are capable of performing both down-cutting (forward rotation) and up-cutting (reverse rotation) operations, allowing the tilling operation to be performed in accordance with the type of crops to be planted or field conditions. By the way, in the above-mentioned tillage device,
In order to avoid troublesome work such as replacing the tiller claws when changing tasks, a dual-purpose tiller claw is sometimes provided. As this type of tilling claw, there is one in which blade edge parts are formed on both side edges of the blade part, and an opening is formed in the widthwise center part of the blade part. When installed on the claw shaft of a tiller, even if soil gets bitten between the tilling claws adjacent to each other in the axial direction of the tiller shaft, if this bitten soil escapes from the opening in the blade part. There are advantages to saying that. By the way, the above-mentioned tilling claw has a problem in that the strength of the blade part is weak due to the opening, and in both forward and reverse rotations, first the blade edge on one side of the blade part is submerged into the soil. Each part of the blade penetrates into the path formed by this into the soil, but in the conventional tilling claw, the parts on both sides of the opening of the blade part penetrate into the soil. The thickness of the part other than the blade edge is approximately constant in the width direction, and the opening edge on the trailing side in the rotational direction of the opening of the blade enters an entry path with approximately the same width as the thickness. As a result, the opening edge cannot easily and well penetrate into the entry path, and this causes greater driving resistance to the soil on the trailing side of the rotational direction than the opening in the blade part. However, there was a problem in that the required power was increased.

The present invention has solved the above problem, and its characteristics are that blade edge parts are formed on both side edges of the blade part, and an opening is formed in the widthwise center of the blade part. In the formed forward and reverse dual-purpose tilling claw,
Reinforcing ribs that protrude outward in the thickness direction are formed in the length direction of the blade between each side opening edge of the opening in the blade and each blade edge, and each reinforcing rib is rotated in the normal direction. The point is that the opening edge on each side overlaps substantially the entire length of the edge with respect to the direction or the reverse direction.

Hereinafter, the first embodiment of the present invention will be described based on the drawings of FIGS. 1 to 6. In FIG. It is installed so that it can be raised and lowered. The tilling device 1 includes a machine frame 3, a tilling section 4, a tilling cover device 5, a gauge device 6, and the like.

The machine frame 3 consists of an input gear case 7, a pair of left and right support arms 8 protruding from both sides of the input gear case 7, a transmission case 9 and a side plate 10, etc. installed below from the outer end of each arm 8. A provided input shaft 11 is operatively connected to a PTO shaft of the tractor. The gear case 7 has an input shaft 1
A forward/reverse switching mechanism interlocked with 1 is built in, and this mechanism is interlocked with the tilling section 4 via a transmission mechanism within a transmission case 9.

The tillage cover device 5 includes a fixed main cover 12,
It consists of a rear cover 13 that is bendably connected to the main cover 12 and covers the tilling section 4. The rear cover 13 is urged in the direction of contact with the ground via the bullet lowering mechanism 14, and on the inner surface of the rear cover 13,
A rake mechanism 15 located on the rear side of the tilling section 4 is pivotally supported at the upper end thereof and can be freely adjusted forward and backward with respect to the tilling section 4.

The tilling section 4 includes a transmission case 9 and a side plate 1.
a claw shaft 16 whose both ends are supported by the claw shaft 16;
It consists of a large number of forward and reverse tilling claws 18 attached via claw attachment bodies 17 fixedly attached to the tiller, and can be driven forward and reverse around the horizontal axis.

As shown in FIGS. 2 to 6, the claw mounting body 1
7 consists of a pair of clamping bodies 19, 20 and an engaging body 21, which are welded to the claw shaft 16. Both clamping bodies 1
9 and 20 are provided to protrude outward in the radial direction of the claw shaft 16,
They are opposed to each other in the axial direction of the pawl shaft 16, and a pair of flanges 22, 23 are provided at both ends of the clamping bodies 19, 20 in the circumferential direction of the pawl shaft, and project outward in the axial direction of the pawl shaft. A corresponding bolt hole 24 and a fitting hole 25 are formed between the flanges 22 and 23 of each clamping body 19 and 20, respectively.
are formed through each nail in the axial direction of the nail shaft. The engaging body 21 is constructed between the bases of both the clamping bodies 19 and 20, and has a mountain shape projecting outward in the radial direction of the claw shaft, and has a pair of adjacent parts on the outer circumferential surface of the distal end thereof. Engaging portions 26 and 27 are formed.

The tilling claw 18 has a shape in which a pair of machete claws are integrated with peak parts 28 and 29 facing each other, and has a mounting base 30 inserted between both the clamping bodies 19 and 20.
and a blade portion 31. The mounting base 30 includes
Bolt holes 24 and fitting holes 2 of both clamping bodies 19 and 20
An insertion hole 32 corresponding to 5 is formed through the hole,
A collar 34 with a flange 33 is removably inserted into the fitting hole 25 and the bolt hole 24, and the flange 33 is fitted into the fitting hole 25, and the bolt 35 is inserted into the collar 34 and the bolt hole 24. The tilling claw 18 is removably inserted into the bolt 35 and the nut 36 is removably screwed onto the bolt 35, so that the tilling claw 18 is detachably attached to the claw attachment body 17 so as to be rotatable around the axis of the bolt 35. There is. Note that when the tilling claws 18 are attached, the nut 36 is fitted between the flanges 22 of the clamping body 19 and is prevented from rotating, and the bolt 35 is screwed in this state. 37 is a spring washer. The base end surface of the mounting base 30 is shaped like a mountain projecting outward, and a pair of engaged parts 38, 39 corresponding to the respective engaging parts 26, 27 are formed. 39 corresponds to each engaging portion 26, 27
By engaging and abutting the tiller claws 18 with the second
In the normal rotation tilted position, the tip shown by the imaginary line in the figure is in a backward position in the normal rotation direction (in the direction of arrow a in FIG. 1) than the mounting base 30, and the tip shown by the solid line in FIG. 2 is the mounting base. 30 in the reverse direction (direction of arrow b in Figure 1)
It can be held in a backward tilted position, which is the trailing position, so that it can resist the driving reaction force of the tiller claws 18, both during down cut (forward rotation) work and up cut (reverse rotation) work. ing. Further, between the collar 33 of the collar 34 and the mounting base 30, a bullet 40, which is exemplified by a disc spring that is removably fitted to the main body of the collar 34, is interposed in a spring shape. The frictional force generated by the elastic force of the machine 40 is
It is considered as a resistance force against rotation of the tilling claws 18,
The frictional force prevents the tilling claws 18 from turning into an intermediate position among the above-mentioned positions due to centrifugal force caused by rotation when the tilling claws 18 are removed from the soil during each of the above operations. . The above-mentioned frictional force is adjusted to be smaller than the driving reaction force against the soil when the tilling claws 18 rotate forward and backward, and as the direction of rotation of the claw shaft 16 changes from forward rotation to reverse rotation or vice versa, The tilling claws 18 can change their posture from a normal tilted posture to a reverse tilted posture or vice versa by driving reaction force. Further, the above-mentioned frictional force is adjusted by tightening the bolt 35 to the nut 36. The blade portion 31 is bent at the tip side, and has a bent portion 42 on the tip side via a bent portion 41, and a portion extending from the base to the tip on both side edges of the blade portion 31 has an outwardly curved protrusion. A pair of blade edge portions 43 and 44 for forward rotation and reverse rotation are respectively formed in the shape of a shape, and an opening portion 46 surrounded by the ridge portions 28 and 29 is formed in the center portion of the blade portion 31 in the width direction. It is formed. The opening 46 has an egg shape that tapers toward the tip of the tilling claw 18, and the blade portion 3
A pair of reinforcing ribs 46 and 47 that protrude outward in a curved manner in the thickness direction are provided on the front side of the substantially central part in the width direction on both sides of the opening 45 of the tiller 1 .
8, that is, each blade edge 43, 44 and each ridge 28, 29 which is the opening edge of the opening 45.
It is formed along the curve and has an outwardly curved protrusion. The lateral projected lengths of the reinforcing ribs 46 and 47 are approximately the same as or slightly larger than the lateral projected length of the opening 45. And each reinforcing rib 4
6 and 47 are overlapped with the opening edge on each side of the opening 45 over substantially the entire length of the edge in the normal rotation direction or the reverse rotation direction.

According to the embodiment configured as described above, when the tilling device 1 performs a down cut (normal rotation) operation or an up cut (reverse rotation) operation, the tilling claws 18 are in the normal rotation inclined position shown by the solid line or the imaginary line in FIG. Or, the tilling claw 18 enters into the soil from the forward rotation or reverse rotation blade edge portions 43 and 44, and the blade portion 31 enters into the soil in the path formed thereby. As the tilling claws 18 rotate, each part intrudes into the soil one after another, but in any of the above-mentioned operations, the path of entry into the soil is through the reinforcing ribs 46, which are on the leading side of the opening 45 in the rotational direction; 47, the ridges 28 and 29, which are the opening edges on the rearward side in the rotational direction of the opening 45, enter the entry path more easily and better than before. The driving resistance against soil in the trailing portion of the blade portion 31 relative to the opening 45 in the rotational direction is small, and the required power is small.

FIG. 7 shows a second embodiment of the present invention, in which reinforcing ribs 46 and 47 are formed on the back side of the blade portion 31.

FIG. 8 shows a third embodiment of the present invention, in which reinforcing ribs 46 and 47 are constructed by fixing members having a semicircular cross section to the blade portion 31.

9 and 10 show a fourth embodiment of the present invention, in which a pawl mounting body 17 shown by a circular mounting flange is fixed to a pawl shaft 16. Cultivating claw 18
is made of a bent elongated plate, one surface of the mounting base 30 is in contact with the claw mounting body 17, and a collar 34 with a flange 33 is inserted into the insertion hole 32 of the claw mounting body 1.
The collar 33 is inserted from the opposite side to the collar 34 so as to protrude outward, and the bolt 35 inserted through the collar 34 is screwed into the bolt hole 24 of the claw attachment body 17. A claw 18 is detachably attached to the claw attachment body 17. Engaged parts 38 and 39 are formed on the circumferential end side of the proximal surface of the mounting base 30, respectively, for engaging with the claw shaft 16 and holding the tilling claws 18 in the normal rotation tilted posture and the reverse rotation tilted posture. has been done.
The blade portion 31 has an opening 45 in the center in the width direction, and reinforcing ribs 46 and 47 are provided on both sides of the opening 45, respectively.
8 is formed in a straight line in the length direction.

As described in detail above, the present invention provides reinforcing ribs that protrude outward in the thickness direction between the opening edge on each side of the opening in the blade portion and each blade edge portion, each extending the length of the blade portion. Since each reinforcing rib overlaps the opening edge on each side over almost the entire length of the edge in the normal rotation direction or the reverse rotation direction, the blade blade portion In the entry path into the soil formed by the leading part in the rotational direction, the part where the opening edge on the trailing side in the rotational direction enters is almost the entire length, and its width is expanded by the reinforcing ribs on the leading side in the rotational direction. Therefore, the opening edge on the trailing side of the rotation direction penetrates into the soil easily and well, and therefore, when the tilling claws are turned forward or backward, the opening edge on the blade part penetrates into the soil easily and effectively. Also, it is possible to reduce the driving resistance against the soil on the trailing side in the rotational direction, thereby reducing the required power and increasing the strength of the blade portion. The present invention has the above advantages,
It is very profitable.

[Brief explanation of the drawing]

Figures 1 to 6 show the first embodiment of the present invention, with Figure 1 being an overall side view, Figure 2 being a longitudinal sectional view of the tilling section, Figure 3 being a front view of the same part, and Figure 4 5 is a front sectional view of the main part, FIG. 6 is a sectional view taken along the line A-A in FIG. 2, and FIG. 7 is a tilling claw showing a second embodiment of the present invention. 8 is a cross-sectional view of a tilling claw showing a third embodiment of the present invention, FIG. 9 is a longitudinal cross-sectional view of a tilling part showing a fourth embodiment of the present invention, and FIG. 10 is the same part. It is a front view. DESCRIPTION OF SYMBOLS 1... Rotary tilling device, 18... Forward/reverse dual-use tilling claw, 30... Mounting base, 31... Blade portion,
43, 44...blade edge, 45...opening, 46,
47...Reinforcement rib.

Claims (1)

[Scope of utility model registration request] In a forward/reverse type tilling claw in which blade edge parts are formed on both side edges of the blade part and an opening is formed in the widthwise center part of the blade part, each side opening of the opening in the blade part is used. Reinforcing ribs protruding outward in the thickness direction are formed between the edge and each blade edge in the length direction of the blade, and each reinforcing rib is attached to each side opening edge in the forward or reverse rotation direction. A tilling claw that can be used in both forward and reverse directions, characterized in that the edges thereof overlap over substantially the entire length thereof.