JPH0337363Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tilling claw support means that can support the tilling claw without requiring fasteners such as bolts or nuts.

In general, support means for removably supporting the tilling claws on a claw holder provided on the tilling shaft are well known, but in the conventional support means, there is a method for removably fitting the holder portion of the tilling claws. Since the holder hole of the claw holder was formed in a simple rectangular shape, fasteners such as bolts and nuts were required to fix the held portion of the tiller claw to the holder hole of the claw holder. Therefore, attachment and detachment of the tilling claws becomes complicated, and the tightening manner of the tilling claws becomes loose due to loosening of fasteners, etc., which causes the above-mentioned tilling claws to be damaged or bent. There was a problem.

In addition, as an improved conventional support means,
There is one shown in Figures 9 and 10 (Japanese Patent Application Publication No.
57-5601). This support means includes a large number of claw holders 2X (one shown in the drawing and others omitted) provided on the outer peripheral surface of a tilling shaft 1 connected to a gear case (none of which is shown) of a tillage device. Insert the blade part 5 of the tiller claw 3X into the holder hole 21X.
When the held portion 31 adjacent to the holder 31 is detachably supported by inserting the stop pin 4 into the pin hole 34, the inner surface of the holder hole 21X is inserted into the pin hole 24.
A wedge-shaped inclined surface 22
3X, and the holder portion 31 of the tilling claw 3X to be inserted into the holder hole 21X was also formed with wedge-shaped inclined surfaces 32X and 33X on both the upper and lower left and right side surfaces, corresponding to the above. Therefore, even if the above-mentioned fasteners such as bolts and nuts are not used, when the tilling claw 3X receives a reaction force from soil tillage while the tiller is in use, the holder portion 31 of the tilling claw 3X is removed from the rear part. The front part b with a as the fulcrum
The inclined surfaces 32X, 33X are pressed against the inclined surfaces 22X, 23X of the claw holder 2X on this side, which are in contact with the inclined surfaces 32X, 33X, resulting in a wedge-shaped state. As a result, the holder portion 31 of the tilling claw 3X
is firmly and reliably supported by the claw holder 2X. However, since the clamping support is performed by providing the inclined surfaces 22X and 23X on the claw holder 2X and the inclined surfaces 32X and 33X on the held portion 31, the shapes of the claw holder 2X and the held portion 31 are not specified. This made it unsuitable for use as a support for various types of tillers. In addition, the clamping force is also dispersed over the entire slope, and there is a limit to the clamping force, and there is a risk that the clamping force will become unstable in a tillage device with severe load fluctuations. In addition, when forming the slopes 22X and 23X of the upper and lower holder holes 21X, the claw holder 2X described above is made by welding two metal plates of the same shape with a dogleg shape in cross section at the upper and lower center bands, so that it is difficult to till. When the tilling claws 3X are subjected to the reaction force of the soil tillage mentioned above during use of the machine, the reaction force with the wedges biting in will cause the tilling claws 3X to move in the circumferential direction with the stop pin 4 as the axis against the inclined surfaces 22X and 23X. It acts as a resultant force of the vectors of and in the axial direction. Therefore, stress concentration occurs at the joint, cracks occur in the welded portion d, and the original form of the claw holder 2X collapses, thereby causing a problem in that the support means for the tilling claw 3X disappears. This invention was made in order to solve the above problems, and its purpose is to easily support the tilling claw without the need for fasteners such as bolts and nuts, and to provide a strong tilling claw. The objective is to provide a means of support for

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

1 and 2 show a first embodiment of this invention. First, to explain the configuration, similarly to the latter conventional example described above, a large number of claw holders 2 shown below are welded or otherwise arranged at appropriate intervals on the outer peripheral surface of the tilling shaft 1 so as to form a radial shape when viewed from the side. It is fixed by means of. The above nail holder 2 is
A receiving part is constituted by the reinforcing part H, which consists of two metal plates, each approximately U-shaped, with left and right sides separated, so that the upper and lower end surfaces of one U-shaped plate overlap the upper and lower end surfaces of the other, and the outer peripheral end thereof is at the welded part d. It is integrated.
In this case, the holder hole 21 of the claw holder 2 is
Pin holes 24 drilled at symmetrical positions at intermediate height
The upper and lower side walls are formed on the sloped surfaces 22 and 23 as sloped portions, with the side walls closer to the overlapping end surface being thicker and the intermediate height side closer to the pin hole 24 being thinner, forming a pinching support portion. has been done. As a result, the reaction force of tilling the soil during use of the tiller against the held portion 31 of the tilling claw 3 inserted into the holder hole 21 acts in the axial direction on the retaining pin 4 for tilling. It is configured.

Further, the tilling claw 3, which is removably inserted into the holder hole 21, is composed of a blade portion 5 (partially omitted in the drawing) and a holder portion 31 as follows.

The held portion 31 is configured such that the intermediate bodies on the left and right side portions are formed into parallel surfaces, and a gap e is formed with each of the inclined surfaces 22 and 23 of the claw holder 2 described above. Also, the upper and lower ends of the above parallel plane are
They are formed into reduced-sized inclined surfaces 32 and 33 having a larger angle than the inclined surfaces 22 and 23 of the nail holder 2 described above. Therefore, the pin hole 24 of the claw holder 2 is inserted into the pin hole 34 drilled in the intermediate body of the held part 31.
When the retaining pin 4 is inserted from the inside, the tilling claw 3 is inserted into the holder hole 21 with the intersection of the parallel surface and the inclined surfaces 32 and 33 on each side becoming a local contact portion c as a clamping support portion. It is configured to abut on the inclined surfaces 22 and 23 on each side near the upper and lower ends of. The space between the inclined surfaces 32 and 33 of the held portion 31 is configured as a stopper.

The stop pin 4 described above fits and engages the held portion 31 of the tilling claw 3 into the holder hole 21 of the claw holder 2, and the pin hole 24 of the claw holder 2 and the tilling claw 3 are connected to each other.
The tilling claws 3 are inserted through the pin holes 34 of the
is removably fixed to the claw holder 2. Note that the stop pin 4 is prevented from coming off by a split pin or the like (not shown).

To explain the operation using the above configuration, when the tilling shaft 1 is rotated by the operation of a prime mover (not shown) and the tilling claws 3 start tilling the soil,
Since the above-mentioned tilling claw 3 receives the reaction force of soil tilling through the blade part 5 on the rear upper side, the holder part 31 of the tilling claw 3 is attached to the tilling shaft 1 by the stop pin 4 of the pin hole 24.
Using the rear portion a on the side separated from the nail holder 2 as a fulcrum, the contact portion c on the front side is pressed against the inclined surfaces 22 and 23 of the claw holder 2 at each position, and is supported under pressure. In this case, the upper and lower ends of the claw holder 2 are reinforced by bending the left and right side walls, thereby avoiding stress concentration due to the clamping support and preventing cracking. That is, because the intermediate height portion of the pawl holder 2 near the stop pin 4 is formed to have a thinner wall thickness due to the pressing of the reaction force, the inclined surfaces 22 and 23 of the holder hole 21 at this position are 4 elastically expands in the axial direction. Therefore, when the clamping force increases to a certain extent, the relative rotation between the held part 31 and the claw holder 2 progresses, and the stopper of the held part 31 comes into contact with the reinforcing part H of the claw holder 2. Therefore, the relative rotation of the held portion 31 with respect to the claw holder 2 is stopped, and the stress concentration that would cause the reinforcing portion to be damaged does not increase at that point. This makes it possible to avoid stress concentration and prevent cracking due to the clamping support. Further, when the pressure of the reaction force disappears, the side wall of the holder hole 21 returns to its original state. In any of the above, the inclined surface 22 of the holder hole 21,
Since the contact portion c of the holder portion 31 is in contact with the holder 23, the side wall of the holder hole 21 has elastic cushioning properties on the side of the gap e using the contact portion c as a fulcrum. Therefore, the above-mentioned buffering property is utilized by the participation of the gap e, and a tightening action is exerted on the contact portion c of the tilling claw 3 due to the elastic force. This eliminates the need for fasteners such as bolts and nuts to secure the holder 31.
can be firmly and reliably supported by the claw holder 2.

FIG. 3 shows a second embodiment of this invention.

The claw holder 2A in this embodiment is entirely made of one material and has a reinforcing portion H and a substantially hourglass-shaped longitudinal section. The side walls of the holder hole 21 of the claw holder 2A are also formed into circular arc-shaped inclined surfaces 25 and 26 in the shape of a drum, similar to the outer peripheral portion.
That is, the slopes 25 and 26 are formed so that the upper and lower end sides are wider than the position of the pin hole 24 through which the stop pin 4 is inserted, and the tilling pawl 3A inserted into the holder hole 21 of the pawl holder 2A. The both sides of the held portion 31 also have substantially the above-mentioned inclined surfaces 25, 2.
6 are formed on similar sloped surfaces 35 and 36 corresponding to 6. A stop is formed between the inclined surfaces 35 and 36. However, near the intermediate height position where the stop pin 4 is inserted, a gap e is formed between the two.
Therefore, in the local contact portion c where the slopes 35 and 36 of the tilling claws 3 abut against the slopes 25 and 26 of the claw holder 2A, the above-mentioned slopes 35 and 36 further expand, so that no gap e exists. These are formed at the upper and lower ends of the holder portion 31, so that the above-mentioned contact portion c is formed on the inclined surface 25 of the holder hole 21,
26.

With the above configuration, in this embodiment, the tilling shaft 1 is operated by the operation of the prime mover (not shown) in the same way as in the previous embodiment.
When the tilling claw 3A starts tilling the soil, the tilling claw 3A rotates its blade part 5.
In this case, the slopes 25 and 26 are formed to have the narrowest width on the intermediate height side of the stop pin 4, contrary to the previous embodiment. The above reaction force is received as a pushing force on the lower side of the front part. Therefore, the pushing up force acts on the side wall surface of the pin hole 24 portion, which is narrower than the width of this position, in the contact portion c of the holder portion 31 in a pushing up manner, so that the holder hole 21 at the position of the stop pin 4 is pushed up.
The reaction force acts on the inclined surfaces 25 and 26 in the axial direction of the stop pin 4 as an elastic force that expands. Therefore, in the same way as described above, the cushioning properties at this position are utilized by the participation of the gap e, and a tightening action by elastic force is exerted on the contact portion c of the tilling claw 3A. Accordingly, in this embodiment as well, the held portion 31 can be firmly and reliably supported by the claw holder 2A without requiring fasteners such as bolts and nuts. Furthermore, since the claw holder 2A of this embodiment is formed from a single material, it maintains strong rigidity even when subjected to the above-mentioned reaction force, and the above-mentioned cushioning properties prevent cracks from occurring at the upper and lower ends. can be prevented from occurring.

FIG. 4 shows a third embodiment of this invention.

The claw holder 2B in this embodiment is entirely made of one piece of material and is formed into a rectangular shape having a reinforcing portion H on the outer periphery. And this nail holder 2
The side wall of the holder hole 21 of B is formed into a substantially pestle shape. In other words, the side wall at the intermediate height position where the pin hole 24 is provided is formed into a narrow parallel surface, but the side wall near the upper and lower ends are inclined surfaces 27 and 28 which are further enlarged concave portions of the side wall at the intermediate height position. is formed. Also, the held portion 3 of the tilling claw 3B inserted into the holder hole 21 of this claw holder 2B.
1, the sides at the intermediate height position are formed parallel to the external surface so as to correspond to the above-mentioned inclined surfaces 27 and 28, but the sides near the upper and lower ends are at the intermediate height. They are formed into inclined surfaces 37 and 38, which are formed by enlarging the side portions of the positions into convex shapes. In this case, a gap e is formed between the parallel longitudinal surfaces at the intermediate height. Therefore, the contact portion c where the sloped surfaces 37 and 38 of the tilling claw 3B abut against the sloped surfaces 27 and 28 of the claw holder 2B is located close to the upper and lower ends of the neck of the pestle where the gap e at the intermediate height has disappeared. It is configured as follows.

Due to the above configuration, in this embodiment, when the tilling claw 3B starts tilling the soil, similarly to the above-mentioned both embodiments, the tilling claw 3B receives a reaction force through its blade portion 5. However, in this example as well, the second
As in the embodiment, since the intermediate height position of the stop pin 4 is formed on a narrow parallel surface, the above-mentioned reaction force is received on the lower side of the front part. Therefore, in this embodiment as well, the inclined surfaces 27 and 28 of the pawl holder 2B act as an elastic force that expands in the axial direction of the stop pin 4.
As a result, as described above, the cushioning property at this position is utilized by the participation of the gap e, and a tightening action by elastic force acts on the contact portion c of the tilling claws 3B, making it necessary to use fasteners such as bolts and nuts. Therefore, the held portion 31 can be firmly and reliably supported by the claw holder 2B. Also, in this embodiment, the claw holder 2B is made of a single piece of material as in the second embodiment, so it maintains strong rigidity even when subjected to the above reaction force, and has the above-mentioned cushioning properties. It is possible to prevent cracks from occurring at the upper and lower ends.

Figures 5a, b, and c show a fourth embodiment based on the first, second, and third embodiments of this invention according to the above.
This shows an example.

In this embodiment, a large-diameter flange disk body 6 is concentrically fitted to the tilling shaft 1 similar to that shown in FIG. Notches 7 (shown with one or two pieces)
The claw holders 2 or 2A, 2B according to the three embodiments described above are installed in each notch 7, and the holder holes 21 of the claw holders 2A and 2B are arranged at appropriate intervals in a manner similar to the direction of centrifugal force. 6, and is fixed by means such as welding. In addition, the tilling claws 3 or 3A, 3B of the three embodiments described above are removably fixed in the holder holes 21 of the claw holders 2, 2A, 2B welded to the disk body 6 by inserting locking pins 4 therein. has been done.

With the above configuration, in this embodiment, the tilling claws 3
Or, when the tilling claws 3A and 3B start tilling the soil, they receive the same reaction force as described above, but the buffering properties of the claw holders 2 or 2A and 2B are utilized by the participation of the gap e, and the tilling claws 3 or 3A, Since a tightening action due to elastic force acts on the contact portion c of 3B, in this embodiment as well, the held portion 31 is attached to the claw holder 2 or 2A, 2B in the same way as in the three basic embodiments described above.
can be firmly and reliably supported. In addition, since the claw holder 2 or 2A, 2B is welded flush with the flange disc body 6, the strong rigidity of the outer periphery of the claw holder 2 or 2A, 2B is maintained even if the claw holder 2 or 2A, 2B is subjected to the above reaction force. This makes it possible to easily and reliably prevent the upper and lower ends from cracking.

FIGS. 6a and 6b show a fifth embodiment based on the first, second and third embodiments of the invention described above.

In this embodiment, as in the fourth embodiment, a large diameter flange disk body 6 is fitted concentrically to the tilling shaft 1, and a surface near the outer periphery of one side of the disk body 6 is fitted with a large diameter flange disk body 6. With the same arrangement as above, the basic three mentioned above can be achieved.
The claw holder 2 or 2A, 2B according to the embodiment,
Since the holder hole 21 is parallel to the surface of the disc body 6, it is fixed by means such as welding. And the claw holder 2 welded to the disk body 6
Further, tilling claws 3 or 3A, 3B according to the three basic embodiments described above are removably fixed to 2A, 2B by inserting a stop pin 4 therethrough.

With the above configuration, in this embodiment, the tilling claws 3
Or, when 3A and 3B start tilling the soil, the claw holder 2 receives the same reaction force as described above.
Alternatively, the loose water in 2A and 2B is utilized by the participation of the gap e, and a tightening action by elastic force acts on the contact portion c of the tilling claws 3 or 3A and 3B,
In this embodiment, similarly to the three basic embodiments described above, the held portion 31 is connected to the claw holder 2 or 2A, 2.
It can be firmly and reliably supported by B. In addition, since the claw holder 2 or 2A, 2B is welded flush with the flange disc body 6, the claw holder 2 or 2A, 2B has strong rigidity due to welding on the outer periphery even if it receives the above reaction force. In addition, due to the above-mentioned reasons, the reaction force does not spread to the upper and lower ends of the claw holder 2 or 2A, 2B, making it possible to easily and reliably prevent the upper and lower ends from cracking.

Figures 7a and 7b show a sixth embodiment of this invention.

In this embodiment, as in the fourth and fifth embodiments, a large-diameter flange disc body 6 is fitted concentrically to the tilling shaft 1, and a flange disc body 6 with a large diameter is fitted concentrically to the tillage shaft 1, and a flange disc body 6 is fitted close to the outer periphery of one side of the disc body 6. A large number of recesses 8 (one recess is shown in the drawing) for configuring a part or half of the claw holder 2 is provided in the surface portion in the same manner as described above, and the outer position of the recess 8 is A part of the claw holder 2 or a remaining part of the half body part or a holder part 9 forming the half body part is fixed by means such as welding, and a holder hole similar to that in the first embodiment is formed inside the holder part 9. 21 are configured. The tilling claws 3 of the first embodiment are removably fixed in the holder holes 21 with locking pins 4 inserted therein.

With the above configuration, each holder hole 21 configures the recess 8 provided in the flange disk body 6 as a part or half of the claw holder 2, so that the original form is easily maintained and the held part 31 can be easily prevented from being deformed or falling off even if it receives reaction force from soil tillage. Furthermore, since the same clamping force as in the first embodiment is exerted due to the cushioning properties, the held portion 31 of the tilling claw 3 can be firmly and reliably supported by the claw holder 2.

Figures 8a and 8b show a seventh embodiment of this invention.

In this embodiment, in the same way as shown in FIG.
A and 2B have a large number of half-body nail holders 2c (one in the drawing) in the same arrangement as above, and the cross section is approximately doglegged. (as shown) or at appropriate intervals, and are fixed by means such as welding. In the holder hole 21 according to this embodiment, a tilling claw 3c having a holder portion 31 having a substantially doglegged cross section is removably fixed by inserting a stop pin 4 therethrough.

With the above configuration, in this embodiment, the tilling claws 3
When c receives the reaction force of soil tillage, the claw holder 2
Since the held part 31 in the inner part has a tightening action similar to that of the three basic embodiments described above with its own elastic force due to the plate-like body, the held part 31 is firmly fixed to the claw holder 2c. It can be supported easily and reliably. In this embodiment, the claw holder 2c and the tilling claws 3c are both formed of plate-shaped bodies, so they can be easily processed and costs can be reduced, and they are also convenient for work such as scouring, where the above-mentioned reaction force is relatively small. It has the advantage of being usable.

As is clear from the above, according to the configuration of this invention, the tilling claws can be easily supported without using bolts or nuts, and the degree of freedom in the shape of both the claw holder and the held part is greatly increased. However, the clamping force also locally increases significantly. Therefore, it is possible to more firmly support various types of tilling claws such as large-sized claws that are subject to large load fluctuations. Moreover, even if the clamping force becomes strong in this way, stress concentration during clamping support can be avoided by the stopper and the receiving part, and it is possible to maintain strong support for a long time.

Note that this invention is not limited to the above embodiment.

[Brief explanation of the drawing]

FIG. 1 is a side view of essential parts showing a support means for tilling claws according to a first embodiment of this invention, FIG. 2 is a longitudinal cross-sectional view taken along the line - in FIG. 1, and FIG. A vertical sectional view shown at a position corresponding to - in the figure,
FIG. 4 is a vertical sectional view showing the third embodiment at a position corresponding to - in FIG. 1, FIG.
FIG. 5b is a partially vertical front view of the same part, FIG. 5c is a perspective view showing a part of the claw holder used in this embodiment, FIG. 6a is a partially longitudinal side view showing the fifth embodiment, and FIG.
Fig. 7a is a side view showing the sixth embodiment; Fig. 7b is a longitudinal sectional front view of the same part; Fig. 8a is a side view showing the seventh embodiment; Fig. b is a longitudinal sectional front view of the same part, Fig. 9 is a side view of a main part showing a support means for a tilling claw in a conventional example, and Fig. 10 is a longitudinal sectional view taken along the - line in Fig. 9. Explanation of the symbols representing the main parts of the drawings: 1... Tilling shaft, 2, 2A, 2B... Claw holder, 3, 3A,
3B... tilling claw, 4... stop pin, 21... holder hole,
22, 23, 25, 26, 27, 28, 32, 3
3, 35, 36, 37, 38... Inclined surface (pinching support part), 31... Holder part, H... Reinforcement part.

Claims (1)

[Scope of utility model registration request] Fitting the held part of the tilling claw into a holder hole having an inclined part of the claw holder protruding from the tilling shaft,
The claw holder and the held part are fitted together so as to be relatively rotatable within a predetermined range with respect to the rotational direction of the tilling shaft, and the fitted part of the claw holder and the held part is fitted with a part of the held part when the tilling shaft is rotated. A clamping support part that locally clamps and supports the held part in the inclined part of the holder hole by the relative rotation is provided, and a stopper protrudes from the clamping support part on an end surface of the held part in the clamping rotation direction. A means for supporting tilling claws, characterized in that the holder hole is provided with a receiving part that receives the stopper and regulates the clamping force when a predetermined clamping force is applied.