JP2006006284A - Tilling claw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of conventional tilling claw, especially in a walking type working machine provided with a rotary on the front part of the machine body having a balancing point at the rear part of the machine body, that deep tilling of the ground is impossible due to the reactive force in the hard ground because the curvature of a blade is small and close to straight and in tilling work the point in the vicinity of flat and leaner part contacts to the ground at the beginning of rotation and the cutting-in resistance of the blade part from the beginning of the contact with the ground is large. <P>SOLUTION: The the tilling claw 1 installed on a claw shaft 6 of the rotary 24 comprising a base part 3 which is a mounting part to the claw shaft 6, a cultivating blade body 2 extending from the base part 3 and curving outward in the radial direction of the rotation, and the cultivating blade body 2 is composed of a linear flat part 2a arranged on the base part 3 side and a curved part 2b installed on the top end side, wherein the tilling craw is formed so that the ground contacting point Pg of the rotating tilling claw 1 which contacts with the ground at the beginning in tilling, locates on the side end of the base part 3 of the tilling blade body 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a configuration of a tilling nail mounted on a rotary nail shaft.

Conventionally, tilling claws such as egg claws are attached to a rotary provided in a management machine or the like. As a management machine to which such a tilling nail is attached, for example, there is a walking type management machine in which a rotary is arranged at the front of the machine body.
The tilling claw, like the tilling claw 101 shown in FIG. 8, extends from the base 103, which is a part to be attached to the claw holder 105 of the claw shaft 106, and is outside in the rotational radius direction (downward in FIG. 8). The tilling blade body 102 is convexly curved toward the top, and a blade portion 104 is formed on the tilling blade body 102. Further, the tilling blade body 102 includes a flat portion 102a formed in a flat plate shape and disposed on the base portion 103 side, and a curved portion 102b disposed on the front end side of the straight flat portion 102a and curved toward the front side of the sheet. It is configured.
Thus, the tilling claw 101 including the base portion 103 and the tilling blade body 102 is also described in Patent Document 1.
No. 7-15368

In the conventional tilling claw 101 shown in FIG. 8 described above, the curvature of the blade edge of the blade portion 102a that is convexly curved downward is linear with a small curvature. Since the point P to be grounded is in the vicinity of the central portion of the straight flat portion 102a, the cutting resistance when cutting the soil after the blade portion 102a is first grounded is increased.
That is, since the conventional tilling nail was cut by hitting the tilling blade against the ground and cutting it off, the cutting resistance increased.
In this way, when the cutting resistance is large, there is a problem that in a walking type management machine in which a rotary is arranged at the front part of the aircraft where the weight balance is at the rear part of the aircraft, a reaction force is generated on hard soil and deep plowing is not possible. there were.
Therefore, in the present invention, the shape of the tilling nail is improved, and even in the walking type management machine with the weight balance in the front, the tilling blade is smoothly digged into the soil to sufficiently secure the tilling depth. A tilling blade that can be used is provided.

The tilling nail | claw which solves the said subject has the following characteristics.
That is, as described in claim 1, a tilling nail mounted on a rotary nail shaft,
A base portion that is an attachment portion to the claw shaft, and a tilling blade body that extends from the base portion and curves convexly outward in the rotational radius direction, and the tilling blade body is a straight flat portion disposed on the base side; In the tilling nail composed of the curved portion arranged on the tip side, the first grounding portion of the rotating tilling nail at the time of tilling work is formed into a shape that becomes the base side end of the tilling blade body The reaction force against the ground can be reduced.
This makes it possible for the tilling blade to gradually cut into the soil after the first grounding point of the tilling nail has been grounded, reducing the resistance when cutting the soil, and reducing the tilling nail It is possible to smoothly dig into the soil and secure a sufficient tilling depth.
Therefore, even when the tilling claw is mounted on a rotary disposed at the front of the machine body of the management machine, it is possible to sufficiently secure the tilling depth.

The tilling claw gradually cuts the straight flat portion of the tilling blade body into the ground to the start portion of the curved portion after the base side end portion of the tilling blade body to be grounded first comes into contact with the ground.
Thereby, resistance at the time of cutting the soil is reduced, and the tilling claw can be smoothly bitten into the soil, so that the tilling depth can be sufficiently secured.
Therefore, even when the tilling claw is mounted on a rotary disposed at the front of the machine body of the management machine, it is possible to sufficiently secure the tilling depth.

In addition, as described in claim 3, the ratio of the cutting length of the tilling blade body into the soil with respect to the rotation angle of the tilling nail gradually decreases as it goes from the base side to the tip side of the tilling blade body.
This makes it possible to reduce the amount of cut immediately after the first grounding portion of the tilling nail touches down and gradually cut at a substantially constant rate. Can be smoothly taken into the soil, and the tilling depth can be secured.
Therefore, even when the tilling claw is mounted on a rotary disposed at the front of the machine body of the management machine, it is possible to sufficiently secure the tilling depth.

According to a fourth aspect of the present invention, the dimension between the rotation center of the tilling nail and the tip side end of the cutting portion of the tilling blade body gradually increases as the cutting amount of the tilling blade body increases.
Accordingly, since the cutting blade body in a range that is not so large is gradually cut from the point when the first grounding portion of the tilling nail is grounded, the cutting resistance is reduced and the cutting can be performed smoothly.
Therefore, even when the tilling claw is attached to a rotary disposed at the front part of the body of the management machine, the reaction force against the ground is reduced and the tilling depth can be sufficiently secured.

Further, as described in claim 5, the width dimension of the blade portion of the tilling blade body is set to about one third of the width dimension of the entire tilling blade body.
As a result, the tilling blade can be smoothly digged into the soil and can be deeply cultivated.
Therefore, even when the tilling claw is mounted on a rotary disposed at the front of the machine body of the management machine, it is possible to sufficiently secure the tilling depth.

According to the present invention, it is possible to reduce the resistance when cutting the soil, to smoothly dig the tilling nail into the soil, and to ensure a sufficient tilling depth.
Therefore, even when the tilling claw is mounted on a rotary disposed at the front of the machine body of the management machine, it is possible to sufficiently secure the tilling depth.

Next, modes for carrying out the present invention will be described with reference to the accompanying drawings.
First, the configuration of a walking type management machine having a rotary to which a tilling claw is attached will be briefly described. In the walking-type management machine 10 shown in FIG. 1, an engine 21 is arranged at the upper center of the aircraft, a traveling wheel 22 is arranged at the rear lower part of the aircraft, and a rotary 24 is arranged at the front lower part. ing. An auxiliary wheel 39 is disposed in front of the rotary 24.

The power from the engine 21 is transmitted to the transmission case 23 via the transmission case 29, and further transmitted from the transmission case 23 to the traveling wheels 22 and the rotary 24.
A handle base 41 is provided behind the engine 21, and an operation handle 42 is attached to the handle base 41 so as to be rotatable in the vertical direction. A shift lever 44 is disposed below the handle 42.
The rotary 24 is configured by mounting a plurality of tilling claws 1, 1,... On the claw shaft 6, and can be driven to rotate by the engine 21.

Next, the tilling claw 1 attached to the claw shaft 6 of the rotary 24 will be described.
As shown in FIG. 2, the tilling claw 1 has a base portion 3 that is a portion to be attached to the claw holder 5 of the claw shaft 6, and extends from the base portion 3 toward the outer side in the rotational radius direction (downward in FIG. 2). The tilling blade body 2 is convexly curved, and a blade portion 4 is formed on the tilling blade body 2.
Further, the tilling blade body 2 includes a straight flat portion 2a that is formed in a flat plate shape and is disposed on the base portion 3 side, and a curved portion 2b that is disposed on the front end side of the straight flat portion 2a and is curved toward the front side of the sheet. It is configured.

The width dimension Wb of the blade section 4 of the tilling blade body 2 is set to about one third of the width dimension Wa of the entire tilling blade body 2, and the blade section 104 of the conventional tilling blade body 102 shown in FIG. The width dimension Wq of the blade portion 4 is set to be about one-seventh the width dimension Wp of the entire tilling blade body 102, and the ratio of the width dimension Wb of the blade portion 4 is increased.
Thus, by forming the blade portion 4 with a large width dimension Wb, the tilling blade body 2 can be smoothly digged into the soil and deeply cultivated.

In addition, the bending position angle (elevation angle) α is set to be large at the boundary between the straight flat portion 2a and the curved portion 2b where the tilling blade body 2 is bent so as to reduce the soil cutting resistance. In this example, the bending position angle α is set to 65 °, for example.
Further, as shown in FIG. 3, the bending portion 2b is bent with respect to the straight flat portion 2a, but the bending radius R of the bending portion 2b is configured to be smaller than the bending radius of the conventional tilling claw 101. Thus, the left and right run-out and vibration of the tilling claw 1 at the time of cutting are reduced. The thickness dimension T of the tip of the tilling blade body 2 is also made smaller than that of the conventional tilling claw 101 to reduce biting into the soil and vibration.
Furthermore, the tip width dimension Wt of the tilling blade body 2 is formed larger than that of the conventional tilling claw 101 to improve the wear resistance.

Further, the tilling claw 1 is formed in a shape close to an arc shape by increasing the curvature of the blade edge of the blade portion 2a curved downward, and the tilling claw 1 is rotated around the claw shaft 6. When the tilling operation is performed, the ground contact point Pg, which is the first ground contact point in the tilling blade body 2, is formed in a shape that becomes the base 3 side end of the tilling blade body 2.
By forming in such a shape, it becomes possible for the tilling blade body 2 to gradually cut into the soil after the grounding point Pg is grounded, reducing the resistance when cutting the soil, The tilling claw 1 can be smoothly swallowed into the soil to ensure a sufficient tilling depth.
That is, the tilling claw 1 of the present invention is cut like a sword while sliding the tilling blade body 2 against the ground after the grounding point Pg is grounded. 1 can be smoothly taken into the ground.

This will be described in detail below.
First, FIG. 4 shows a conventional tilling claw 101 with a tip side end portion in a portion cut into the soil of the tilling blade body 2 when the grounding point Pg is rotated by a certain angle from the grounded state. Each point is shown.
For example, when the grounding point Pg is rotated by an angle θ from the grounded state, the tip side end portion in the portion cut into the soil of the tilling blade body 2 becomes the point Pa, and further rotated by the angle θ from the point Pa. When the tip end is the point Pb, when the tip end is further rotated by the angle θ, the tip end is the point Pc. When the tip end is further rotated by the angle θ, the tip end is the point Pd. It has become.

In the conventional tilling claw 101, the blade portion 104 of the tilling blade body 102 has an elliptical arc shape with a small curvature and a long major axis, and has a linear shape, and the ground contact point Pg is the center of the straight flat portion 102a. 6, the dimension from the ground contact point Pg to the point Pa when the tilling claw 101 is rotated by the angle θ, that is, the cutting length Da is changed from the other point Pa to the point Pb as shown in FIG. The cut length Db from the point Pb to the point Pc, and the cut length Dd from the point Pc to the point Pd are extremely large.
In other words, the cutting length in a certain rotation angle range θ changes according to the cutting position of the tilling nail, but the cutting length Da (at the cutting position Pa) at the start of cutting is the other cutting position Pa, Pb, It is extremely larger than the cut lengths Db, Dc, and Dd at Pc and Pd.
As a result, in the conventional tilling claw 101, the tilling blade body 102 must be cut at a stroke so as to strike at a slight rotation angle after the grounding point Pg is grounded. Then, the cutting resistance increases.

On the other hand, in the tilling nail 1 according to the present invention, the grounding point Pg and the points Pa, Pb, Pc, and Pd are as shown in FIG. That is, since the curvature of the blade part 4 of the tilling blade body 2 is large and is formed in a substantially arc shape, and the ground contact point Pg is located at the end of the tilling blade body 2 on the base 3 side, the cut length Da There is no significant difference between the cut length Db, the cut length Dc, and the cut length Dd. The cut length Da, the cut length Db, the cut length Dc, and the cut length Dd are in this order. It is gradually decreasing.
That is, the incision lengths Da, Db, Dc, and Dd at the incision positions Pg, Pa, Pb, Pc, and Pd including the start of the incision are substantially equal and gradually decrease as the incision position advances. Not too much.
Further, the cutting length Da of the tilling claw 1 according to the present invention is significantly smaller than the cutting length Da of the conventional tilling claw 101.
Thereby, it becomes possible to reduce the amount of cutting immediately after the ground contact point Pg of the tilling claw 101 is grounded and gradually perform the cutting at a substantially constant rate while sliding the tilling blade body 2 against the ground. Therefore, the cutting resistance can be reduced, the tilling blade body 2 can be smoothly taken into the soil, and the tilling depth can be secured.

Further, FIG. 7 shows a dimension R0 from the rotation center O to the grounding point Pg of each tilling claw 1.101, a dimension Ra from the rotation center O to the point Pa, a dimension Rb from the rotation center O to the point Pb, and the rotation center. A dimension Rc from O to the point Pc and a dimension Rd from the rotation center O to the point Pd are shown.
According to FIG. 7, the dimension R0, the dimension Ra, the dimension Rb, the dimension Rc, and the dimension Rd increase in order from the dimension R0 to the dimension Rd, and the dimension R0 when the ground point Pg is grounded. The dimension Rd when the tilling claw 1 is rotated by 4θ is substantially the same for the conventional tilling claw 101 and the main tilling claw 1.

However, in the conventional tilling claw 101, the difference between the dimension R0 at the ground contact point Pg and the dimension Ra at the point Pa is large. The dimension Ra, the dimension Rb at the subsequent point Pb, the dimension Rc at the point Pc, and the point Pd There is no significant difference from the dimension Rd.
On the other hand, in this tilling nail 1, the difference between the dimension R0 and the dimension Ra, the difference between the dimension Ra and the dimension Rb, the difference between the dimension Rb and the dimension Rc, and the difference between the dimension Rc and the dimension Rd are substantially the same. , The dimension R0 → the dimension Ra → the dimension Rb → the dimension Rc → the dimension Rd.

  As a result, in the conventional tilling claw 101, a large cutting resistance is generated when the range from the grounding point Pg to the point Pa is cut into the soil. In the present tilling nail 1, the grounding point Pg to the point Pd is generated. The cutting resistance which is not so large until the point is generated substantially uniformly.

That is, the conventional tilling claw 101 cuts at once while hitting the wide range of the tilling blade body 102 against the ground from the time when the grounding point Pg is grounded. Since the cutting blade 2 is slid from the ground to the ground while being slid, it can be gradually cut with the cultivating blade 2 in a not so large range, and the cutting resistance becomes small and the cutting can be performed smoothly. it can.
Thereby, even when the tilling claw 1 is attached to the rotary 24 arranged at the front portion of the body of the management machine 10, it is possible to sufficiently secure the tilling depth.

It is a side view which shows the walk type management machine provided with the rotary with which the tilling nail | claw of this invention is mounted | worn. It is a side view which shows a tilling nail | claw. It is a top view which shows the curved part of a tilling nail | claw. It is a side view which shows a mode that the tilling blade body of the conventional tilling nail cuts into the soil. It is a side view which shows a mode that the tilling blade body of the tilling nail | claw of this invention cuts into soil. It is a figure which shows a mode that the cutting length in the fixed rotation angle range of the conventional tilling nail and the tilling nail of this invention changes according to a cutting position. It is a figure which shows a mode that the dimension from the rotation center of a tilling nail to each grounding point in the conventional tilling nail and the tilling nail of this invention changes according to a cutting position. It is a side view which shows the conventional tilling nail | claw.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tillage nail 2 Tillage blade body 2a Straight flat part 2b Curved part 3 Base part 4 Blade part

Claims (5)

A tilling nail attached to the rotary nail shaft,
A base portion that is an attachment portion to the claw shaft, and a tilling blade body that extends from the base portion and curves convexly outward in the rotational radius direction, and the tilling blade body is a straight flat portion disposed on the base side; In the tilling nail composed of a curved portion arranged on the tip side,
A tilling nail characterized by being able to reduce the reaction force against the ground by forming the first grounding portion of the rotating tilling nail into a shape that becomes the base side end of the tilling blade body during the tilling work.   The tilling claw is characterized by gradually cutting the straight flat portion of the tilling blade body to the start portion of the curved portion after the base side end portion of the tilling blade body to be grounded first comes into contact with the ground. The tilling nail according to claim 1.   The ratio of the cutting length of the tilling blade body into the soil with respect to the rotation angle of the tilling nail gradually decreases from the base side to the tip side of the tilling blade body. The described tilling nail.   The dimension between the rotation center of the tilling nail and the tip side end of the cutting portion in the tilling blade body gradually increases as the cutting amount of the tilling blade body increases. The tilling nail | claw as described in any one of 3. The tilling nail according to any one of claims 1 to 4, wherein the width dimension of the blade portion of the tilling blade body is set to about one third of the width dimension of the entire tilling blade body.

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