JPH0491702A - Device of fitting tilling pawl - Google Patents

Abstract

PURPOSE:To prevent occurrence of play between a tilling pawl and a holder by rotating the tilling pawl by tilling resistance of the tilling pawl in the holder, elastically bringing a bent part of the tilling pawl into contact with the end of a projected part in the holder and fixing. CONSTITUTION:A projected part having a central part in the width direction expanding outward is formed in a pawl storing space 3 of a holder 2 and a pin inserting hole 5 is bored on the side. A tilling pawl 6 consists of a fitting base part 7, a longitudinal blade part 10 and a lateral blade part and is provided with a bent part 8 from the fitting base part 7 to the longitudinal blade part 10 in the width direction. The bent part 8 is eccentric toward the rear in the rotational direction at the fitting base part 7 and is provided with a pin inserting hole 9. The bent part 8 is made to expand at the bent side of the lateral blade part. When a tilling shaft 1 is rotated in the arrow direction, the tilling pawl 6 is rotated by tilling resistance of tilling soil around an extraction preventing pin 12 or 17 in the holder 2 and the bent part 8 is elastically brought into contact with the end of the projected part 4 and fixed not to cause play on the holder 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tilling claw attachment device that allows the tilling claw to be easily and easily attached to and removed from a holder provided on a tillage shaft.

[Conventional technology]

Conventionally, the tiller claws were attached by inserting the base into a holder provided on the tiller shaft, and the holder and installation was done by inserting a bolt into the insertion hole provided in the base and tightening it with a nut to attach the tiller claw. A device is generally used to attach tiller claws. In this case, there are problems in that the attachment and removal of the tilling claws is complicated, and looseness of bolts or the like may cause looseness between the tilling claws and the holder, resulting in damage to the tilling claws and the holder.

In order to solve these problems, improvements were made to the base of the holder and tiller claws, and instead of the bolts and nuts mentioned above, a retaining pin was installed that could be inserted into and removed from the insertion hole. For example, it is disclosed in Japanese Utility Model Application Publication No. 1-60609.

[Problem to be solved by the invention]

In the prior art described above, the operation of attaching and detaching the tilling claw is much simpler and easier than in the case of bolts and nuts, but it is still impossible to prevent the occurrence of play between the tilling claw and the holder. , this needed to be solved.

The present invention has been made to solve the above problems.

[Means to solve the problem]

In order to achieve the above object, the present invention installs the tilling claw by inserting the base into a holder provided on the tilling shaft, and inserts and inserts the holder and the attachment through the insertion hole provided in the base using a removable retaining pin. In the device, the tilling claw is attached by forming a convex part in the holder whose central part in the width direction bulges outward; From the base to the vertical blade part, the base part forms a curved part that is eccentric toward the rear in the direction of rotation, and to install the tilling claws to the holder, insert the base part along the convex part, and insert it into the insertion hole. The tilling claw is attached by inserting the removable retaining pin, and the tilling shaft is rotated.The tilling claw rotates within the holder due to the tilling resistance of the tilling claw, and the curved part makes elastic contact with the end of the convex part. The invention is characterized in that it is configured to be fixed in place.

[For production]

With the above-described structure, the present invention is capable of attaching the tilling claw to the holder by inserting the base with its curved part along the convex part of the holder, and inserting and removing the retainer into the insertion hole. Insert the pin and attach the tilling claw, rotate the tilling shaft, the tilling claw rotates within the holder due to the tilling resistance of the tilling claw, and the curved part elastically contacts the end of the convex part and is fixed, eliminating play. does not produce

When removing the tilling claws from the holder, hit the base of the tilling claws on the outside of the holder with a hammer or the like from the opposite side of the rotation direction to rotate the tilling claws around the retaining pin; Release the elastic contact between the curved part of the holder and the convex part of the holder,
By removing the retaining pin, the tilling claw can be removed from the holder, and the tilling claw can be easily replaced.

〔Example〕

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

1 to 4, reference numeral 1 is a tilling shaft of a rotary tilling device (not shown), and a holder 2 is attached to this tilling shaft 1.
is fixed by welding. The holder 2 has convex portions 4, 4 formed in the claw accommodating space 3 so that the center portion in the width direction of the holder 2 bulges outward, and a pin insertion hole 5 is provided on the side surface so as to pass through both side surfaces. It is being In this holder two-jaw housing space 3, there are tilling claws 6 shown in detail in FIGS. 5 and 6.
The tilling claw 6 is attached by inserting and removing the base 7, but the tilling claw 6 is attached to the base 7, a vertical blade part 10, and a horizontal blade part 11, as in the conventionally known ones, and in the width direction, For attachment, a curved portion 8 is formed from the base 7 to the vertical blade portion lO. This curved portion 8 is mounted eccentrically toward the rear in the rotational direction of the base 7, and a pin insertion hole 9 is provided in the curved portion 8. Further, this curved portion 8 is formed so that the side where the horizontal blade portion 11 is bent bulges out.

The retaining pin 1217 inserted into and removed from the pin insertion holes 5 and 9 is shown in FIGS. 1O and 11. The retaining pin 12 includes a head 13, a shaft portion 14, a ring groove 15 formed in the shaft portion 14, and a ring spring 16 fitted into the ring groove 15. Head 18 and shaft 1
9, a spring locking piece 20 formed on the tip side of the shaft portion 19, and a leaf spring 21 locked on the tip of the spring locking piece 20. When the ring spring 16 and the plate spring 21 are inserted into the pin insertion hole 5.9, they elastically contract and pass through, and elastically expand at the protruding end to prevent them from coming out, and then pass through the pin insertion hole 5.9. When it is pulled out, it is pulled out after being elastically contracted.

In an apparatus having such a configuration, when attaching the tilling claws 6 to the holder 2, as shown in FIGS. Insert the curved part 8 along the convex part 4 of the holder 2 as shown by the imaginary line (Fig. 8), align the insertion holes 5 and 9, insert the retaining pin 12 or 17 here, and insert the tip side into the insertion hole. 5 and 9, the head 13 or 18 is struck with a hammer or the like to elastically contract the ring spring 16 or the leaf spring 2I, and the tilling claw 6 is attached, and the tilling shaft f is rotated in the direction of the arrow. Then, the tilling claws 6 rotate around the retaining pins 12 or 17 within the holder 2 due to the tilling resistance of tilling the soil, and the curved portions 8 come into elastic contact with the ends of the convex portions 4 and are fixed. As a result, the tilling claws 6 do not rattle against the holder 2, and therefore, the tilling claws 6 and the holder 2 are not damaged.

Also, when removing the tilling claws 6 from the holder 2,
To install the outer tilling claw 6, hit the base 7 with a hammer or the like from the opposite side of the rotation direction, and tighten the tilling claw 6 with the retaining pin 12 or I7.
When installing the tiller claw, the elastic contact between the curved part 8 of the base 7 and the convex part 4 of the holder 2 is released, and the retaining pin 12
Alternatively, by removing 17, the tilling claws 6 can be easily removed from the holder 2, and the tilling claws 6 can be easily replaced.

〔Effect of the invention〕

As explained above, according to the tilling claw attachment device of the present invention, when the tilling claw is attached to the holder, the tilling claw is attached by inserting the base with its curved part along the convex part of the holder. ,
Insert the removable retaining pin into the insertion hole, attach the tilling claw, rotate the tilling shaft, the tilling claw rotates within the holder due to the tilling resistance of the tilling claw, and the curved part becomes the end of the convex part. Since the tiller claws are fixed in elastic contact with the holders, the tiller claws can be easily attached and detached.Moreover, the tiller claws do not play, making it easy to attach and remove the tiller claws.
'E It won't damage your nails.

When removing the tilling claws from the holder, hit the base of the tilling claws on the outside of the holder with a hammer or the like from the opposite side of the rotation direction to rotate the tilling claws around the retaining pin; Release the elastic contact between the curved part of the holder and the convex part of the holder,
By removing the retaining pin, the tiller claw can be removed from the holder. Therefore, the tilling claws can be replaced easily, easily, and in a short time.

[Brief explanation of drawings]

Fig. 1 is a side view of a tilling shaft and holder showing an embodiment of the present invention, Fig. 2 is an end view of the holder, Fig. 3 is a partial side view of the tilling claw, and Fig. 4 is a view taken along A-A in Fig. 3. 5 is a plan view of the entire tilling claw, FIG. 6 is a side view of the same, FIG. 7 is a side view explaining the operation, FIGS. 8 and 9 are cut end views of the same, and FIG. 1O (
A) to (C) are side and rear views of the retaining pin, No. 11
Figures C) and (B) are side and rear views showing other embodiments of the retaining pin. I... Tilling shaft, 2... Holder, 3... Claw accommodation space, 4... Convex portion, 5, 9... Pin insertion hole, 6... Tilling claw, 7... Mounting is the base, 8... curved part, 10...
・Vertical blade part, 11... Horizontal blade part, 12.17... Retaining pin, 13.18... Head, 14.19... Shaft part,
15...Ring groove, 16...Ring spring, 2o...
- Spring locking piece, 21... leaf spring. Figure 5 Patent applicant: Kobashi Kogyo Co., Ltd. Figure 6

Claims (1)

[Claims] Inserting the mounting base of the tilling claw into a holder provided on the tilling shaft,
In a tilling claw attachment device in which a tilling claw is attached by inserting a removable retaining pin into an insertion hole provided in a holder and a mounting base, the center part in the width direction expands outward in the holder. The tilling claw is formed with a curved part extending in the width direction from the mounting base to the vertical blade portion, and the mounting base has a curved part that is eccentric toward the rear in the direction of rotation, so that the mounting base of the tilling claw is , insert the curved part along the convex part, insert the removable retaining pin into the insertion hole, attach the tilling claw, rotate the tilling shaft, and the tilling claw's tilling resistance will cause the tilling claw to move into the holder. A tilling claw attachment device characterized in that the tilling claw attachment device is configured such that the curved portion is fixed in elastic contact with the end of the convex portion.