JPH0449964B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides a claw support device disposed on a tillage shaft;
This invention relates to a tilling device that includes tilling claws that are detachably attached to the claw support device.

A claw support device in a conventional tillage device of this kind;
The tilling claws attached to this claw support device had a constant cutting angle, which could not be changed, and the range of tillage performance was narrow.

This invention was made to solve the above problems, and its purpose is to provide a tillage device that can obtain a wide range of tillage performance.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, the structure will be explained. As shown in FIGS. 1a, 1b, and 2, the tilling claw 3 of the present invention is formed as follows. In other words, this tilling claw 3
The upper half of the blade part 37 is curved in an arc shape in one direction so that the cutting into the soil and the tilling work in the soil can be effectively achieved with one rotation of the tilling shaft. is formed. The front and rear edges of the blade part 37 due to the vertical surface of the upper half and the bent surface of the lower half, that is, the front and rear edges with respect to the rotation direction of the tilling shaft 1, have vertical surfaces that can be commonly used for forward and reverse rotation. The blades 38 and 39 are formed in such a manner that they form arcuate protrusions outward on each side. As shown by the imaginary line in FIG. 1a, this blade portion 37 has a cross section that is not symmetrical with respect to the claw perpendicular C of the tilling claw 3 toward the vertical blades 38 and 39 on each side thereof. It is formed on a square-shaped refractive surface. Furthermore, the supported part 31 on the head side of the tilling claw 3 has a thin polygonal cross section, and at the mid-height position of the parallel vertical plane in the center, there is a horizontal direction from one side to the other. A pin hole 36 is provided therethrough. One side is formed with inclined surfaces 32 and 33 whose angle decreases from the central longitudinal surface of this side to the ends in the front and back direction, respectively. This slope 3
2 and 33 are sloped surfaces 26 and 2 on one side of the claw support hole 25 formed in the lower surface of the claw support device 2, which will be described later.
It is set at the same angle as 7. Similarly, on the local side, sloped surfaces 34 and 35 are formed that reduce the angle from the central longitudinal surface of that side to the ends in the front and rear directions. The inclined surfaces 34 and 35 are set at the same angle as the inclined surfaces 22 and 23 on the other side in the claw support hole 21 formed in the upper surface of the claw support device 2, which will be described later.

Next, a claw support device 2 is installed around the circumference of the tilling shaft 1.
is formed as follows. That is, as shown in FIGS. 3 to 5, the above-mentioned claw support device 2
is formed in the shape of a short sheath with its top and bottom open, and has a horizontal pin hole 29 extending from one side to the other at a mid-height position in the center. A claw support hole 21 shown below is formed in the upper surface. This claw support hole 21 is formed in a common surface 24 whose one side is bent along a reference line D that coincides with the rotational direction of the tilling shaft 1 . On the other side, when the tilling claw 3 rotates forward and backward relative to the above reference line D, a support that changes the cutting angle so as to form an air space on the excavation blade side to reduce excavation resistance, which will be described later. The angles F and F are formed into inclined surfaces 22 and 23 that coincide with each other at the front and rear sides thereof. Therefore, between the common surface 24 and the inclined surface 22 or the inclined surface 23, a supporting portion is configured that increases the clamping force in accordance with the pressing force of the supported portion 31, which will be described later. Furthermore, the lower surface has claw support holes 21 on the upper surface.
A pawl support hole 25 is formed whose shape is completely opposite to that of the pawl support hole 25. That is, the claw support holes 25 on the lower surface are formed so that one side forms an air space portion (described later) for reducing resistance on the excavation blade side when the tilling claws 3 rotate forward and backward relative to the above-mentioned reference line D. The support angles F and F that change the cutting angle are formed in inclined surfaces 26 and 27 that coincide at the front and rear sides of each side.
The other side is formed into a common surface 28 that is bent along a reference line D that coincides with the direction of rotation of the tilling shaft 1. The above-mentioned claw support holes 21 and 25 are formed to a certain depth from the upper and lower surfaces of each side, and after that, the space between the above-mentioned claw support holes 21 and 25 is expanded to near the peripheral walls in six directions. is formed.

In the pawl support device 2 formed in the above manner, the central pin hole 29 is located on the axis perpendicular line B, which is set on an extension of the perpendicular line connecting the rotation center A of the tilling shaft 1 and one end of its outer periphery. Depending on the embodiment, it is fixedly disposed on the tilling shaft 1 by means such as welding. Note that the length of the pawl support holes 21 and 25 in the direction parallel to the reference line D as described above is such as to obtain a swing angle E that allows a predetermined change in the cutting angle.

Further, the support angles F described above are set at predetermined angles with respect to the reference line D, respectively.
Therefore, when the tilling claw 3 is rotated in reverse, the pin 6 is loosely inserted into the pin hole 36 that matches the pin hole 29 of the claw support device 2, and the above-mentioned swing angle E is changed with respect to the axis perpendicular B. When the tilling claw 3 moves in one direction using the pin hole 36 as a fulcrum, each claw support hole 21 of the claw support device 2,
25 is formed in an inverted manner in the upper and lower positions, so it is configured to change the support angle so as to automatically change the cutting angle. Furthermore, the fifth
L shown in the figure is arranged at right angles to the reference line D. The pin hole axis L is located on the axis perpendicular B shown in FIG. 1. Note that R in FIG. 1 is the radius of rotation from the rotation center A of the tilling shaft 1 to the tip of the tilling shaft 1 when the tilling claws 3 rotate forward and backward. Therefore, the tilling claws 3 are configured to always perform tilling work under the above rotation radius R.

Next, the action will be explained.

With the above configuration, the claw support hole 2 of the claw support device 2
1, 25, loosely insert the non-supporting part 31 of the tilling claw 3,
After inserting the contacts 6 into both pin holes 28 and 36, when the tilling shaft 1 is rotated, for example, in the forward direction, the front edge of the tilling claws 3 in the direction of rotation (for example, one vertical blade 38) will move into the soil. Therefore, due to the soil entry resistance, the tip of the vertical blade 38, which is the soil entry blade, is positioned on the rotation radius R line during tilling, as shown on the right side of FIG. In this state, the claw perpendicular C of the tilling claw 3 has moved forward by the swing angle E from the axis perpendicular B of the claw support device 2. In other words, tilling claw 3
The supported part 31 above the pin hole 36 moves to one end K side beyond the pin hole axis L in FIG. This means that it has moved to the end N side. When the supported part 31 moves to this state, the supported part 31
The upper claw support hole 21 on the K side has a common surface 24 on the left side, an inclined surface 22 on the right side, and the other end K side upper claw support hole 21 has a common surface 24 on the left side and an inclined surface 22 on the right side. The end N side lower claw support hole 25 is
Since the right side is the common surface 28 and the left side is the inclined surface 27, the tilling claws 3 during normal rotation are in a twisted position with the pin 6 as the fulcrum, tilting to the right when viewed from the direction of FIG. The angle F forms a predetermined cutting angle. Therefore, as shown at the bottom of Figure 1,
The vertical blade 39 of the tilling claw 3 becomes the excavating blade and is located on a line retreated by the air space H from the tilling progress line of the vertical blade 38 of the soil entering blade. At the same time, the back surface 1 of the tilling claws 3 is hidden from the soil, and this portion receives very little resistance from the soil.
This greatly reduces the resistance during forward rotation, allowing smooth plowing work.

As described above, the left and right inclined surfaces 32 and 34 on one upper side of the supported part 31 are pressed into contact with the left and right common surface 24 and the inclined surface 22 on the one end K side of the claw support device 2, and the supported part Left and right sloped surface 3 at the other bottom of 31
3 and 35 are pressed against the left and right inclined surfaces 27 on the N side of the other end of the claw support device 2 and the common surface 28 on this side in a clamping manner, so that the rightward twisting posture during normal rotation is easily achieved. It is possible to maintain the stability of tillage work reliably.

Next, when the tilling shaft 1 is rotated in the opposite direction, the tilling claw 3
Since the other vertical blade 39 serves as the soil entry blade, the tip of the vertical blade 39 is automatically aligned on the rotation radius R line during tilling, as shown on the left side of Fig. 1, due to the soil entry resistance. will be located. In this state, the claw perpendicular C of the tilling claw 3 has automatically moved backward by the swing angle E from the axis perpendicular B of the claw support device 2.
In other words, the unsupported portion 31 above the pin hole 36 of the tilling claw 3
has moved beyond the pin hole axis L in Fig. 5 to the other end N side, and the unsupported portion 31 below the pin hole 36 has moved beyond the pin hole axis L to the one end K side. . When the non-supported part 31 moves automatically in the claw support device 2 in this way, the claw support hole 21 on the other end N side of the position where the upper side of the supported part 31 has moved has its left side facing the common surface 24. However, the right side is the inclined surface 23, and the one end K side lower claw support hole 25 at the position where the lower side of the supported part 31 has moved is the common surface 28 on the right side, but the left side is the common surface 28. Because of the inclined surface 26, the tilling claws 3 during reverse rotation assume a twisted posture in which the entire tilling claw 3 is tilted to the left using the pin 6 as a fulcrum, and the cutting angle is changed depending on the support angle F. In this case, support angle change 2F
will be changed accordingly. Therefore, the vertical blade 38 of the tilling claw 3
becomes the excavation blade and is located on a line retreated by the air space H from the tilling progress line of the vertical blade 39 of the earth entry blade. As a result, a predetermined tillage performance can be obtained by reverse rotation and changing the cutting angle.

As a result of the above, the left and right inclined surfaces 33 and 35 on the other upper part of the supported part 31 are pressed against the common surface 24 and the inclined surface 23 on the left and right sides of the other end N side of the claw support device 2, and this pressure contact force is applied. The clamping force also increases as the clamping force increases, and the left and right inclined surfaces 32 and 34 at one lower part of the supported part 31
are the left and right inclined surfaces 2 at one end K side of the claw support device 2
6 and the common surface 28 on this side in a clamping manner, and the clamping force is increased in the same manner as described above, the left-leaning twisting position during reverse rotation can be easily and securely maintained to ensure stability of tilling work. Can be done.

FIG. 6 shows another embodiment of the invention.

In this embodiment, the tilling claw 3 of the previous embodiment is used, and the claw support device 4 to which the tilling claw 3 is mounted is formed as follows. That is, in the claw support device 4 of this embodiment, the claw support holes 41 and 42 have a width that allows the supported portion 31 of the tilling claw 3 to be inserted, and the claw support holes 41 and 42 are arranged symmetrically at the support angle F with respect to the reference line D. V
It runs through the shape of a letter. Therefore, in this embodiment, this claw support hole 41 is formed by manually moving a pin (not shown) provided in the pin hole axis L and inserting a pin (not shown) from the pin hole 36 of the tilling claw 3. Since the predetermined support angle F can be changed with respect to the reference line D, the cutting angle of the tilling claws 3 can be changed by manually changing the support angle F. In this example,
In addition to the above-mentioned forward and reverse tilling claws 3, normal unidirectional tilling claws can also be used.

FIG. 7 shows yet another embodiment of the invention.

Similar to the embodiment shown in FIG. 6, this embodiment also uses the tilling claws 3 of the above-described embodiment, but the claw support device 5 to which the tilling claws 3 are attached is formed as follows. That is, in the claw support device 5 of this embodiment, the claw support holes 51 and 52 have a width that allows the supported portion 31 of the tilling claw 3 to be inserted, and the claw support holes 51 and 52 have X-shaped intersections with the same support angle F with respect to the reference line D. It is installed through the structure. Therefore, in this embodiment, for example, the tilling shaft 1
When the plowing claw 3 moves in the forward direction, the supported part 31 is manually moved into the claw support hole 51 on one side, and the tilling claw 3 is moved from the pin hole (not shown) provided with the pin hole axis L.
By inserting a pin or the like (not shown) through the pin hole 36, the claw support hole 51 is aligned with the reference line D.
Since it is in a predetermined support angle F state with respect to the excavated blade side, it is possible to form an air space H similar to that in the above embodiment on the excavated blade side and also to change the cutting angle. For reverse rotation, the tilling claws 3 are manually twisted in the same manner as described above. This embodiment also has the advantage that it is possible to perform tilling work by forward and reverse rotation using ordinary one-way tilling claws.

As explained above, according to the configuration of the present invention, since the cutting angle of the tilling claws can be changed, the tilling performance can be obtained at any time. Furthermore, if the tilling claws are made into forward and reverse claws that can be rotated in the forward and reverse directions, it is possible to automate the switching of the cutting angle in the forward and reverse directions.

[Brief explanation of the drawing]

Figures 1a and 1b are explanatory diagrams showing the configuration of the tilling claw of the tilling device of the present invention and its angular arrangement during forward and reverse rotation, Figure 2 is a side view of the tilling claw, and Figure 3 is a side view of the tilling claw. A perspective view showing the configuration of the support device and the supported portion of the claw, FIG. 4 is a longitudinal cross-sectional side view of the same claw support device taken along the - line in FIG. 3, and FIG. FIG. 6 is a plan view showing a claw support device according to another embodiment of the present invention; FIG. 7 is a plan view showing a claw support device according to another embodiment of the present invention. FIG. 1... Cultivating shaft, 2, 4, 5... Claw support device, 3
... Cultivating claw, 6... Pin, 21, 25, 41, 4
2, 51, 52...nail support hole, 29, 36...pin hole.

Claims (1)

[Scope of Claims] 1. A tillage device in which tilling claws are attached to a tillage shaft via a claw support device, wherein the claw support device is provided with a pair of claw support holes that support supported portions of the tillage claws at two locations in the longitudinal direction. A tillage device characterized in that the claw support hole is formed in a shape that allows the supported part to move back and forth in the rotational direction, and the end portions of both claw support holes are displaced in the thickness direction of the supported part. . 2. Claims for registration of a utility model characterized in that the above-mentioned tilling claw is formed with vertical blades on the leading edge and the trailing edge in the direction of rotation of the tilling shaft, thereby making it a forward-reverse claw that can be used for forward and reverse rotation. The tillage device according to item 1.