JPH0238567Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a device for attaching a tilling claw that can be used in both forward and reverse directions. A supporting portion for supporting the claw is integrated with a claw mounting bracket piece for inserting a pivot shaft for the opposing claw into the claw mounting body, and the supporting portion is fixed by abutting against the claw mounting body. In particular, the object is to provide a very simple and inexpensive mounting device that has excellent impact resistance by applying a stopper from a claw mounting body to such a mounting device.

The applicant has previously proposed a common pawl that can be used in both forward and reverse directions and is attached around the pawl shaft that can be switched between forward and reverse directions. We are committed to ensuring optimal tillage work for both the reverse and reverse directions.

This is usually done by arranging the machete symmetrically in the front and back so that they are integrated, and allowing the machete to take a forward or reverse position only when necessary, and has come to be very effective both in terms of theory and in practice. It is something.

This swinging type special claw is inserted between split opposing claw brackets and is pivoted so as to be restricted from swinging by a supporting part at the base between both brackets. Although there was no such problem, the following problem occurred when this was attached to the claw mounting flange or one side of a single claw mounting bracket.

By fixing the integrated support part and claw mounting bracket piece to the side of the claw mounting body with bolts, etc., if excessive force is applied to the support part, the force will be applied to the claw mounting bracket. This caused an impact to act between the surfaces, and as can be seen from a comparison with an opposing bracket protruding around the claw axis, there was a risk of damage as the shearing impact would act on all the structurally weak mounting surfaces. .

This invention was made from this point of view, and the feature here is that a claw mounting body is provided protruding from the outer periphery of a tilling claw shaft that can be switched between forward and reverse directions, and the claw mounting body is On one side, there is a supporting part that supports the forward and reverse type tilling claws in each of the forward and reverse rotation positions, and a supporting part that faces the claw mounting body and for inserting the pivot shaft between the claw mounting body. A bracket body which is integrated with a claw mount bracket piece is fixedly installed with a supporting part in contact with one side of the claw mount, and the bracket body is integrated with a bracket piece on one side of the claw mount. The point is that a stopper is provided in a protruding manner that is in contact with the receiving part.

The illustrated embodiment will be described below.

FIG. 1 is an overall view, and FIGS. 2 and 5 show specific examples thereof.

In FIG. 1, reference numeral 1 denotes a tilling device that can be switched between forward and reverse directions without changing the mounting position of the tractor, and is connected to the tractor side by a three-point link 2. Reference numeral 3 denotes an input box equipped with an input shaft 4, which has a switching lever 5 for switching the transmission direction as shown in the figure, and an internal conversion mechanism (not shown).
6 is a transmission case on the left side, 7 is a support plate on the right side, and an upper support pipe 8, a middle rotary main cover 9, a rear cover 10, etc. are arranged between them.

Reference numeral 11 is a variable-angle rake rod, which brings fine soil to the upper layer. Reference numeral 12 indicates a bullet lowering mechanism, and reference numeral 13 indicates a rear two-wheel device, to which a tilling claw shaft 14 is rotatably supported below the rotary.

This pawl shaft 14 can take forward rotation (down cut) and reverse rotation (up cut) rotation positions by the switching lever 5, and a disc-shaped pawl is mounted on the outer periphery of this pawl shaft 14. Flange 1
5 are fixed in multiple rows.

The special claw 19 is pivotally attached to the side surface of the flange 15 via a bolt 16, a sleeve 17, a disc spring 18, etc., and therefore has a chevron-shaped support portion 20 at its base end and a claw at its tip. The mounting bracket pieces 21 are welded together to form an integrated bracket main body 22, which is fixed to the side surface of the pawl mounting flange 15 with the support portion 20 facing against it. Therefore, the department in charge 2
0 through which fixing bolts 23, 23 are passed.

With such a bolt, as mentioned above, an excessive force is applied to the fixing bolt 23, which appears as a shearing action, so even a fairly large bolt 23 has the disadvantage of not being able to withstand it sufficiently. A pair of front and rear stoppers 24, 24 are welded and protruded from the support portion 15, and these stoppers 24 are configured to face the support portion 20 at the front and rear thereof.

Of course, the stopper 24 may be arranged on the inner circumferential side of the support part 20, or the support part 20 may be fixed by welding as shown in FIG. Furthermore, the seventh
As shown in the figure, the support portion 20 and the claw mounting bracket piece 21 may be integrally formed.

Therefore, even if a strong shearing force is applied, the stopper 24
By synergistically acting as a resistor, the impact resistance is significantly improved, and as a result, the claws 19 can always be maintained in a normal posture, ensuring proper tillage.

The stopper 24 is configured to be on the same surface as the support portion 20 so that it can also perform a support function, but it may also be used exclusively as a stopper. Furthermore, although the disk spring 18 is said to not make the claw erect only by centrifugal force, it may be omitted.

The invention thus far makes it possible to provide a highly resistant mounting device with an extremely simple and inexpensive structure.

The rotary cover shown in FIG. 1 has a front cover 25 that is integrated with the main cover 9, but with such an integrated type, there is a lot of soil adhering to the back surface of the front cover 25 when the claws are reversed. In order to prevent this, a swing-avoiding front cover 25 is provided at the same time. When installing it, as shown in FIG. 8, a support arm 28 is provided protruding from a lower link bracket 27 connected to a top mast 26, and a front cover 25 is pivoted to the tip of the support arm 28, so that the main cover 9 side serves as a stopper. Constructed to be able to be evaded forward. Although not shown in the drawings, if the front cover 25 is to be amplified according to the plowing width, a connecting shaft protruding from the extension side pipe is pushed in from the side on the standard side of the cover pivot pipe 29 to engage and release the groove as appropriate. It is also free to connect them with each other using a lock lever. In this case, a rubber plate may be attached to the inner surface of the front cover 25.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing an example of this invention as a whole tillage device, Fig. 2 is an enlarged side view thereof, Fig. 3 is a rear view thereof, Fig. 4 is an enlarged sectional view of the mounting part, and Fig. 5
The figure is an exploded perspective view, FIGS. 6 and 7 are sectional views of main parts showing other examples of the claw attachment structure, and FIG. 8 is a perspective view illustrating an additional specific example. 1... Cultivating device, 14... Cultivating claw shaft, 15...
Claw mounting flange, 20... Support part, 21... Claw mounting bracket piece, 22... Bracket body, 24
...Stotsupa.

Claims (1)

[Scope of utility model registration request] A claw mounting body is provided protruding from the outer periphery of the tilling claw shaft that can be switched freely between forward and reverse directions, and a tilling claw that can be used in both forward and reverse directions is received on one side of the claw mounting body in each of the forward and reverse rotation positions. A bracket body is formed by integrating a supporting part to support the claw mounting body and a claw mounting bracket piece facing the claw mounting body for inserting the pivot between the claw mounting body and the supporting part to the claw mounting body. The bracket is fixedly installed in contact with one side, and has a stopper protruding from one side of the claw mount that is in contact with the receiving portion of the bracket body. Mounting device for type cultivating claws.