JPH0371081B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention requires a fastener to prevent it from falling off, but it is possible to support the tiller claws without the need for fasteners such as bolts or nuts. This invention relates to a support means for tilling claws.

(b) Technical Background and Problems Generally, support means for removably supporting tilling claws on a claw holder provided on a tilling shaft are well known. The holder hole of the claw holder was formed into a simple rectangular shape for removably fitting the tiller into the holder, so when fixing the held part of the tilling claw to the holder hole of the claw holder, it is necessary to use bolts, nuts, etc. Required fasteners. 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.

Furthermore, conventional supporting means improved from this are shown in FIGS. 6 and 7. i.e. the gear case of the tillage device (none of which is shown)
A large number of claw holders 103 (only one is shown in the drawing and the others are omitted) are provided on the outer peripheral surface of the tilling shaft 101 connected to the tiller, and the blade portion 109 of the tilling claw 107 is inserted into the holder hole 105 of the claw holder 103. When the holder portion 111 connected to the holder 111 is detachably supported by inserting the stop pin 115 into the pin hole 113, the inner surface of the holder hole 105 is rotated both above and below with the pin hole 117 as the border. The holder hole 1 is formed on wedge-shaped inclined surfaces 105a and 105b whose left and right sides gradually decrease with respect to the direction.
Holder part 1 of tilling claw 107 inserted into 05
11 also had similar wedge-shaped inclined surfaces 111a and 111b on both the upper and lower left and right side surfaces, corresponding to the above. Therefore, even if the aforementioned fasteners such as bolts and nuts are not used, when the tilling claw 107 receives a reaction force from soil tillage while the tillage device is in use, the held portion 111 of the tilling claw 107 will stop. pin 115
The inclined surfaces 111a and 111b of the front part a and the rear part b are pressed against the inclined surfaces 105a and 105b of the holder hole 105 on the side in contact with the front part a and the rear part b, using the fulcrums as fulcrums, so that a wedge is formed. There is something configured.

However, in such a conventional tilling claw support means, the holder hole 10 of the claw holder 103
5 are formed into wedge-shaped inclined surfaces 105a, 105b, and the holder portion 111 of the tilling claw 107 to be inserted into the holder hole 105 is formed into wedge-shaped inclined surfaces 111a, 111b corresponding to the above. It is extremely difficult and tends to cause machining errors, and this machining error causes the claw holder 105 and the held part 1 to
There may be looseness in the fitted state of 11.
In this case, there was a problem that the tilling claws 107 were not supported reliably.

(c) Purpose of the Invention This invention was devised in view of the problems of the prior art, and its purpose is to fix tilling claws that require a fixing device to prevent them from falling off. To provide a support means for a tiller claw that can be easily supported without requiring fasteners such as bolts, nuts, etc., and that can be easily worked and supported reliably and firmly.

(d) Structure of the Invention In order to achieve the above object, the present invention involves fitting a held part of a tilling claw into a claw holder protruding from a tilling shaft, and inserting a fastening tool into a hole in the claw holder and the held part. In this structure, the shape of the nail holder is approximately dogleg-shaped when viewed from the nail insertion side, and the portion of the nail to be held is approximately rectangular in shape, which is different from that of the nail holder. , when a load is applied to the claw and it rotates around the fastening tool, the held part is fixed to the claw holder under pressure above and below the fastening tool due to the dogleg shape of the claw holder. The structure of the support means for the tilling claws was made to be as follows.

(e) Embodiments Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view of a main part showing a support means for tilling claws according to the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a cross-sectional view taken along the - line in FIG. Figure 2 is a sectional view taken along the - line in Figure 2, and Figure 5 is a - line sectional view in Figure 2.
It is a sectional view taken along the line.

First, to explain the configuration, similarly to the latter conventional example described above, a large number of claw holders 3 are arranged on the outer circumferential surface of the tilling shaft 1 by means such as welding at appropriate intervals so as to form a radial shape when viewed from the side. It is fixed.

The claw holder 3 is entirely made of a single piece of material and is formed into a rectangular shape. The holder hole 9 of the claw holder 3 has a fixing part 11 formed in parallel inclined surfaces 15 and 17 in a substantially dogleg shape, with the pin hole 13 protruding at a symmetrical position at the center height as a border. It is configured.

Further, the tilling claw 5 which is removably inserted into the holder hole 9 is composed of a holder portion 7 and a blade portion 19 (partially omitted in the drawing).

The held portion 7 has a substantially rectangular shape, with intermediate bodies on the left and right sides formed as parallel surfaces, and is configured such that a gap C is created between the left and right inclined surfaces 15 and 17 of the claw holder 3. has been done.

Then, the held part 7 of the tilling claw 5 is fitted into the holder hole 9 of the claw holder 3 and engaged, so that the pin hole 13 of the claw holder 3 and the held part 7 of the tilling claw 5 are engaged.
A stop pin 23 as a fastener for preventing the claw holder 3 from falling off is inserted into the pin hole 21 of the nail holder 3, thereby removably fixing the tilling claw 5 to the claw holder 3. Note that the stop pin 23 is prevented from coming off by a split pin or the like (not shown).

Next, to explain the operation using the above configuration, the tilling shaft 1 is rotated by the drive of the tilling device,
As a result, when the tilling claw 5 starts tilling the soil, the tilling claw 5 causes the held part 7 to move against the claw holder 3 by the pressure of soil tilling through the blade part 19. 3, the lower part of the held part 7 is attached to the claw holder 3 as shown in FIG.
The upper part of the held part 7 is pressed against the parallel inclined surfaces 15, 17 on the rear side a of the claw holder 3, and the upper part of the held part 7 is pressed against the parallel inclined surfaces 15, 17 on the front side b of the claw holder 3, as shown in FIG.
17 will be forced. in this way,
Since the rectangular cross section of the held portion 7 is pressed against and inserted into the upper and lower parallel inclined surfaces of the dogleg shaped cross section of the holder hole 9 of the claw holder 3,
The held portion 7 is fixed to the claw holder 3 by pressure at two locations above and below the stop pin 23.

Therefore, the held portion 7 is firmly and reliably fixed to the claw holder 3.

In the above case, since the held portion 7 is formed to have a substantially rectangular cross section, it is easy to process. Furthermore, since the pawl can be replaced simply by inserting and removing the stop pin 23, the pawl replacement work can be done easily.

Note that this invention is not limited to the above embodiment. For example, the nail holder 3 side or both the nail holder 3 and the held portion 7 can be fixed by twisting.

(f) Effects of the invention As is clear from the above explanation, according to the structure of the invention, the tiller claws are supported using a fastener to prevent them from falling off, but without using fasteners such as bolts or nuts. This is easy to do, and when the tilling shaft is rotated, the held part is fixed at two locations, upper and lower, by rotation of the fixing device around the nail holder, so it can be firmly and reliably fixed. Further, the fitting portion can be fixed without requiring any special parts, has a small number of parts, is easy to work with, and has the advantage of being able to efficiently replace the claws.

[Brief explanation of drawings]

The drawings show embodiments of the invention.
The figure is a perspective view of a main part showing the support means for tilling claws according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG.
A sectional view taken along the - line in the figure, Fig. 4 is a - of Fig. 2.
5 is a cross-sectional view taken along the - line in FIG. 2, FIG. 6 is a side view of essential parts showing a support means for the tilling claw in the conventional example, and FIG. 7 is a cross-sectional view taken along the - line in FIG. 6. It is an arrow sectional view. Explanation of the symbols representing the main parts of the drawing, 1...
Tilling shaft, 3...Claw holder, 5...Tilling claw, 7...
...Holded part, 9...Holder hole (fitting hole),
11...Fixed part.

Claims (1)

[Claims] 1 In a structure in which the held part of the tilling claw is fitted into a claw holder protruding from the tilling shaft, and a fastening tool is inserted into the hole in the claw holder and the held part, the shape of the claw holder is such that the claws are not inserted. When viewed from the side, it has an approximately dogleg shape, and the holder part of the nail is approximately rectangular in shape, which is different from the nail holder, and the nail is loaded and rotates around the fastener. The tiller claw supporting means is characterized in that the holder portion is press-fixed to the claw holder above and below the fastener due to the dogleg shape of the claw holder.