JPH0214323Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields The present invention relates to a forward and reverse tiller.

(b) Conventional technology Conventionally, there has been a tiller blade formed on the front and rear edges of one tiller claw to enable both forward and reverse tilling action with the same tiller claw. ) As seen in the publication, there is one in which the attachment part of the above-mentioned tilling claw is swingably attached to the claw shaft so that the leading blade in the rotational direction of the tilling claw is in a trailing inclined position during forward and reverse rotation. .

(c) Problems to be solved by the invention However, in the above-mentioned conventional technology, since the tilling blades are formed on the front and rear edges of the tilling claws, the front and rear width of the tilling blades is large. When driving the soil, the side surfaces of the claws come into contact with the soil and create resistance to the tilling operation, which has the disadvantage of increasing power consumption during tilling.

(d) Means for solving the problem In the present invention, the lower half attachment part of the forward/reverse tilling claw, which is formed by integrally molding the forward rotation claw and the reverse rotation claw approximately symmetrically, is placed inside the claw case protruding from the rotary shaft. At the same time, the front and rear inner width of the case is made wider than the front and rear width of the lower half mounting part, so that the rotation locus of the tip of the tiller claw located on the rotation direction side of the rotary shaft is , in the forward/reverse tilling claw configured to be located outside of the rotation locus of the opposite tip that follows and is drawn, a central recess is formed between the tip of the forward rotation claw and the tip of the reverse claw. Therefore, it is an object of the present invention to provide a forward and reverse tilling claw which is characterized by being formed into a substantially heart shape when viewed from the side.

(E) Functions and Effects According to the present invention, the forward rotation pawl and the reverse rotation pawl are integrally molded approximately symmetrically, and a central recess is formed between the tip of the forward rotation pawl and the tip of the reverse rotation pawl. By forming the forward and reverse tilling claws into a roughly heart shape when viewed from the side, the lateral area of the claws is reduced, which reduces the resistance of the soil that is applied to the sides of the tilling claws when driving the tilling claws into the soil during tilling work. This has the effect of reducing power consumption during tilling.

(f) Example If the example of the present invention is explained in detail based on the drawings, A
shows a rotary part connected to the rear of the tractor. The rotary part A has a chain case 2 hanging down from the left end of the drive shaft case 1, and a rotary shaft support facing the case 2 from the right end. Install it vertically,
A rotary shaft 3 is connected between the case 2 and the lower end of the support.
A large number of claw cases 4 are protruded from the circumferential surface of the rotary shaft 3, and forward and reverse tilling claws 5 are attached to the claw cases 4.
By attaching the rotary shaft 3 and rotating the rotary shaft 3 in the normal or reverse direction depending on the purpose of the work, the required work can be performed via the tilling claws 5.

The forward and reverse tilling claws 5 are integrally formed with a forward rotation claw 6 in the front half and a reverse rotation claw 7 in the rear half, and the tip 6-2 of the forward rotation claw 6 and the tip 7- of the reverse rotation claw 7 are integrally formed. The tip edges of the forward and reverse tilling claws 5 between the two are curved inward to form a central recess a, and the front and rear both edges are bulged outwards to form the upper half of the front and rear both edges of one side. And, tapered surfaces 6-1 and 7 are provided on the upper edges of both sides, respectively.
In addition, a bolt insertion hole 9 is provided in the lower half attachment part 8 of the forward/reverse tilling claw 5, the lower half attachment part 8 is fitted into the claw case 4, and the case 4 is inserted from the outside. The inserted bolt 10 is inserted into the bolt insertion hole 9.
By inserting the tiller claw 5 into the case 4, the tiller claw 5 is attached to the center position of the case 4.

The claw case 4 is formed into a longitudinally longitudinal rectangular cylindrical shape and has an opening 11 at its outer end, and the front and rear inner surfaces 4-1 and 4-2 are used for the lower half attachment portion 8 of the forward and reverse tilling claws 5, respectively. Formed to make close contact with the front and rear sides,
Moreover, the front and back width of the case 4 is formed to be slightly longer than the front and rear width of the lower half attachment part 8, so that when the tilling claws 5 are attached, the front side of the lower half attachment part 8 and the front inner surface 4 of the case 4 are formed. 1 or between the rear surface of the lower half mounting part 8 and the rear inner surface 4-2 of the case 4.
is formed.

Therefore, when the rotary shaft 3 rotates forward, that is, when the rotary shaft 3 rotates forward, the rear surface of the lower half mounting portion 8 comes into contact with the rear inner surface of the claw case 4 and is biased.
A gap g is formed between the front side of the lower half mounting part 8 and the front inner surface of the case 4, and the rotation radius is from the axis of the rotary shaft 3 to the tip 6-2 of the forward rotation pawl 6. When the rotation locus l1 of 6-2 is located outside the rotation locus l2 of the tip 7-2 of the reversing claw 7, and the rotary shaft 3 rotates in the reverse direction,
The lower half mounting portion 8 is biased in the opposite direction, and the rotation locus l1 is located inside the rotation locus l2.

Therefore, when performing plowing work by rotating the rotary shaft 3 in the forward direction and using the forward rotation claws 6, the lower half mounting portion 8
Bring the rear side into contact with the rear inner surface of the claw case 4,
The lower half-mounting part 8 is biased to form a gap between the front side surface of the lower half-mounting part 8 and the front inner surface of the claw case 4, and in the same state, the bolt 10 is attached to the lower half-mounting part 8 to the claw case 4.
If it is installed through the tip 6 of the forward rotation pawl 6
The rotation locus l1 drawn by -2 is the tip 7 of the reversing claw 7.
-2, the tip 7-2 of the reversing pawl 7 does not come into contact with the soil into which the tip 6-2 of the forward pawl 6 is driven, and the resistance to tilling operation is reduced. This prevents it from becoming larger.

In particular, by forming the central recess a between the tip 6-2 of the forward rotation claw 6 and the tip 7-2 of the reverse rotation claw 7, the lateral area of the forward and reverse tillage claw 5 is reduced, and the contact with the soil is reduced. Since the area is reduced, the resistance to tilling operation is reduced, and the power required for tilling can be reduced.

In addition, when the rotary shaft 3 rotates in the reverse direction, if the lower half mounting portion 8 is biased in the opposite direction to the previous state, the rotation trajectory l2 of the tip 7-2 of the reversing claw 7 can be changed.
is the rotation locus l1 drawn by the tip 6-2 of the forward rotation claw 6.
By locating the groove on the outer side, the resistance to the tilling operation is prevented from increasing as described above.

The forward and reverse tilling claws 5 may be loosely fitted into the center of the claw case 4 via a pivot, and when the rotary shaft 3 rotates, the tilling claws 5 rotate due to the resistance of the tilling operation. The rotational trajectory of the tip of the claw that is located forward in the rotational direction is biased in the opposite direction to the rotational direction, and the rotational trajectory of the tip of the same claw located at the rear is located outside.

According to the present invention, the rotation locus of the tip of the forward and reverse tilling claw located at the front in the rotational direction of the rotary shaft is configured to be located outside the rotation trajectory of the tip of the same claw located at the rear, and the forward rotation claw 6 By forming a central recess a between the tip 6-2 of the reversing claw 7 and the tip 7-2 of the reversing claw 7, vibrations are prevented from occurring during tilling work, and the power required for tilling work is reduced. The effect is that it can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a side view of the rotary part having forward and reverse tilling claws according to the present invention, Fig. 2 is a side view of the main part, Fig. 3 is a view taken along the - line in Fig. 2, and Fig. 4 is the same. A side view of the main part, Fig. 5 is the − in Fig. 4.
Line arrow view. A: rotary part, a: central recess, 3: rotary shaft, 4: pawl case, 5: forward/reverse tilling pawl, 6: forward rotation pawl, 6-2... tip of forward rotation pawl, 7: reverse rotation pawl,
7-2: Tip of reverse claw, 8: Lower half mounting part.

Claims (1)

[Scope of Claim for Utility Model Registration] A claw case 4 in which a lower half mounting portion 8 of a forward and reverse tilling claw 5, which is formed by integrally molding a claw 6 for forward rotation and a claw for reverse rotation 7 in a substantially symmetrical manner, protrudes from the rotary shaft 3. The case 4 is pivotally mounted so as to be swingable inside, and the front and rear inner width of the case 4 is made longer than the front and rear width of the lower half mounting part 8,
The tilling claw 5 located on the rotation direction side of the rotary shaft 3
In a forward/reverse tilling claw configured such that the rotation locus of the tip of the tip is located outside the rotation locus of the opposite tip which is followed and drawn, the tip 6-2 of the forward rotation claw 6 and the reverse rotation claw A forward/reverse tilling claw characterized in that a central recess a is formed between the tips 7-2 of 7 and 7-2 to form a substantially heart shape in side view.