JPH0353882B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a rotary cover for a rotary tiller. A rotary tiller in which the tiller main body can be reversed back and forth so that cultivation in the forward rotation state (down cut) and tillage in the reverse rotation state (up cut) can be selected depending on the field condition. It has been known. A rotary tiller must be equipped with a rotary cover that covers the tilling shaft on which the tilling claws are planted, but the rear cover, which is placed behind the tilling shaft, prevents soil from scattering and It is desirable to hang it low so that it can be rotated to some extent so that the cultivated field can be leveled well. Further, although this is not particularly necessary in the case of down-cutting, a front cover that covers the front part of the tilling shaft is required in the case of up-cutting. As described above, since appropriate covers are required in front and behind the tilling shaft, it has been extremely difficult to design the shape of the rotary cover in the rotary tiller that can be used by reversing it back and forth as described above. The present invention has been made in view of the above circumstances, and provides a rotary cover that can be used in both directions when the main body of the tilling device is reversed and used in both directions. This will be explained below. The structure of the rotary cover according to the present invention is that the part of the rotary cover that covers the rear part of the tilling shaft when used in a down-cut type is used as a front cover to cover the front part of the tilling shaft when used in an up-cut type. a first cover suitable for use as a rear cover, and a second cover that is suitable for being normally arranged as a rear cover behind the tilling shaft and is detachably attached to the first cover arrangement part. In addition to having a double structure, the second cover removed from the first cover placement part can be detachably attached to a position on the front and back opposite side of the first cover placement part of the cultivating device main body. It is characterized by the fact that it has been made possible. Embodiments of the present invention shown in the drawings will be specifically described below. FIG. 1 is a side view of a rotary tiller according to the present invention, and FIG. 2 is a partial sectional view of its main parts. 2, a tiller main body A including a rotary cover 3, a chain case 4, a gear case 5, pipes 6, 6', etc., and a tail wheel 7,
It consists of a coupling device B having a tail wheel support frame 8, a jack 9, a bracket 10, a mast 11, etc., and the whole is connected to a tractor (not shown) by a link device C connected to the mast 11 and bracket 10 for towing use. be done. Input shafts 5a and 5b protruding from both the front and rear sides of the gear case 5, one of which is connected to the tractor via a universal joint.
Connected to the PTO shaft and receives rotational power. This rotational power is transmitted to the bevel gear device in the gear case 5,
A power transmission device including a transmission shaft 6a housed in a pipe 6, a sprocket wheel in a chain case, and a chain transmits the power to the tilling shaft 2, thereby rotating the tilling shaft. The connecting device B fits the above-mentioned pipes 6, 6' into the U-shaped fitting 10a provided on the bracket 10, and attaches the mounting pin 6b to the U-shaped fitting 10.
By inserting it into the pin hole 10b of a, it can be attached to the cultivating device main body A so as to be reversible back and forth. The rotary cover 3 includes a main cover 3a provided above the tilling shaft, and a rear part (tail wheel side) of the main cover 3a.
A first cover (front cover) 3b and a second cover (rear cover) 3c attached to the
It is equipped with Moreover, side covers 3d are provided integrally with the main cover 3a on both sides of the main cover 3a. The main cover 3a has mounting fittings 12 with pin holes, which form part of a hinge, at both front and rear ends of the main cover 3a.
... are arranged in a row at regular intervals. The front cover 3b consists of a metal fork-type frame 13 and a rubber plate 14 stacked on the frame.The frame 13 has a front cover pivot having a pin hole at the upper end into which a hinge pin 15 is inserted. A garment 16 is provided. Note that the front cover 3b may be manufactured using a steel plate or other metal plate, a synthetic resin plate, or the like. The rear cover 3c is usually made of a metal plate, and has a rear cover pivot fitting 17 with a pin hole at its upper end.
It is equipped with Since it is desirable that the rear cover 3c is designed to level the cultivated field, it has a double structure with a hanging plate 18 at its lower end as shown in the illustration, and the hanging length of this hanging plate 18 is adjusted. It is preferable to make it possible. These front cover 3b and rear cover 3
c is pivoted to the main cover 3a by passing the pin 15 through the pin holes of the pivot fittings 16 and 17, overlapping the pin holes of the attachment fittings 12, . . . of the main cover 3a from both sides. . In this state, the rear cover 3c is superimposed on the front cover 3b, and a dual-structured cover is pivoted to the rear of the main cover 3a. Note that it is preferable to fix the front cover 3b and rear cover 3c, which are overlapped, with bolts 19 as shown in FIG. Further, the rear cover 3c is suspended from the tail wheel support frame 8 by a hanging rod 20, and can be rotated upward against a spring 21 when the height of the field is high. The spring 21 of this hanging rod 20 is temporarily attached to the rear cover 3 when the tiller main body is turned over.
c and then reattached to the rear cover installed on the opposite side. Next, the rear cover 3c can be separately removed from the front cover 3b installation portion and attached to the opposite end of the main cover 3a (the front end on the tractor side in FIG. 1). That is, the fixture 1 provided at the front end of the main cover 3a in FIG.
2 and the pivot fitting 17 of the rear cover 3c removed from the front cover 3b, and by inserting a pin that passes through both, the rear cover 3c is attached to the main cover 3a on the side opposite to the front cover installation part. Hinged in position. In the illustrated example, the front cover 3b is the rear cover 3.
Although it is pivoted in a hinged manner similar to c, it may also be fixed to the main cover 3a. Alternatively, the pins 15 for pivotally mounting the rear cover 3c may be attached in advance to the fixtures 12, . It is also possible to attach it to the pivot of the front cover 3b or the rear cover 3c in advance. Further, in the illustrated example, the rear cover 3c is removed by pulling out the pin 15 from the pivot fitting 17 in a manner similar to disassembling the hinge, and is configured to be pivoted to the mounting fitting 12 on the opposite side. A hinge may be provided on the rear cover 3c itself, and the hinge may be attached to and removed from the main cover. In Fig. 1, when the tilling shaft 2 is rotated in the direction of arrow A and towed in the direction of arrow B, tilling is performed in the normal rotation state (down cut), and the tillage shaft 2 is towed in the direction of arrow C as shown in Fig. 3. If so, plowing is done in reverse. In the case of a down cut, the rear cover 3c is placed over the front cover 3b and is arranged behind the tilling shaft, and in the case of an up cut, the front cover 3b is arranged in front of the tilling shaft, and the rear cover 3c is arranged in the rear. It will be in the set state. In either case, the rear cover prevents soil from scattering to the rear, and the cultivated field is leveled by the rear cover. Furthermore, in the case of a top cut, the front cover 3b effectively prevents soil from scattering forward. As explained above, in the structure of the rotary cover according to the present invention, the part of the rotary cover that covers the rear part of the tilling shaft when used in the down-cut type, and the front part of the tilling shaft when used in the up-cut type. In addition to having a double structure of a front cover suitable for covering the tiller and a rear cover suitable for normally disposing behind the tilling shaft, the rear cover is formed to be detachable, and the front cover is also attached to the front cover installation part. In addition, since the front cover can be attached to both the front and rear opposite positions, the rotary cover is always in a desirable state when the tiller is used with the tiller body reversed front and back. This makes it possible to perform good tillage work in both forward and reverse rotational conditions.

[Detailed description of the invention]

FIG. 1 is a side view of a rotary tiller according to the present invention, FIG. 2 is a perspective view showing a part of the main part with a broken surface, and FIG. 3 is a side view of the main part. 1... Tilling claw, 2... Tilling shaft, 3... Rotary cover, 3a... Main cover, 3b... Front cover, 3c... Rear cover, 4... Chain case, 5... Gear case, 12,... Mounting tool, 13
...Frame, 14...Rubber plate, 15...Pin, 16
...Front cover pivot fitting, 17...Rear cover pivot fitting.

Claims (1)

[Claims] 1. By flipping the tilling device body, which is equipped with a tilling shaft with tilling claws planted therein, a power transmission device that transmits rotational power to the tilling shaft, and a rotary cover that covers the tilling shaft, etc., backwards and forwards, an up-cut type can be used. In a rotary tiller that can be used in either a down-cut type or a down-cut type, a portion of the rotary cover that covers the rear part of the tilling shaft when used in a down-cut type is a first cover; It has a double structure with a second cover that hangs down below the cover, and the second cover can be attached to and detached from the first cover installation part and the position opposite to the first cover. A structure of a rotary cover in a rotary tillage device characterized by being freely provided.