JP4951320B2 - Rotary tillage device - Google Patents

Description

  The present invention relates to a rotary tiller that eliminates clogging due to accumulation of sawdust scattered in a field.

Conventionally, a front portion of a side cover that covers the lateral side of the tilling device is cut out in an arc shape, a disk is provided, and the direction of the disk can be changed by an operation handle. In a field with a lot of excavation, the disc is turned outward, and the front edge of the disc guides them to the tilling device while transferring soil, excavation, etc., and digs up the passage of the chain case in advance. For this reason, when there is a lot of waste, there is a known technique for preventing the hook from catching on the front part of the chain case and dragging the already cultivated land to cause dents in the field or the formation of a lump of straw. 1).
Japanese Utility Model Publication No. 63-155302

  However, the above-mentioned known publication has the effect that the heel pressed by the disc is pushed by the chain case and easily accumulates in the gap. Thus, when the heel is accumulated, the disc does not rotate, and on the contrary, the effect of adding the disc by promoting the accumulation of the heel I can not expect.

  Therefore, the present invention is intended to exert the initial effect by making it difficult to collect in the front part of the chain case.

In view of the above, the invention according to claim 1 is a transmission case (11) including a transmission mechanism that supports one end side of the tilling shaft (10) on one side of the tilling portion and rotationally interlocks with the tilling shaft (10). A support frame (21) is provided on the front side of the transmission case (11), and the support frame (21) is inclined in a plan view so that the front end edge is located outside the tillage portion with respect to the rear end edge. A disk (24) that rotates about an axis is provided, and the support frame (21) is formed in a rod shape or a plate from the position near the rotation center of the outer surface of the disk (24) to the position near the lower end of the transmission case (11). It is set as the structure of the rotary tillage apparatus which provides the rod entry prevention body (25, 25A, 25B, 25C) supported or supported by the transmission case (11) lower end side.

  When the cultivation work by the rotary cultivation device (1) is started, the cultivation claws (13, 13,...) Of the cultivation unit rotate and the soil is cultivated. In front of the transmission case (11), the disk (24) is rotated and brought to the tilling portion with the slanted posture while the disk (24) is rotated, and the transmission case (11) is removed except for the front side of the transmission case (11). 11) facilitate the passage.

The soot accumulates in the vicinity of the outer side of the disk (24) while rotating around the disk (24) and eventually collects between the transmission case (11) and the rear edge of the disk (24) . Since the moss intrusion prevention body (25) is provided from the position near the rotation center of the outer surface to the position near the lower end of the transmission case (11), the moss to be accumulated enters the tillage part from the outside. Prevents dredging and keeps tillage work.

An embodiment specifically configured based on the above technical idea will be described below with reference to the drawings.
Embodiments of the present invention will be described below with reference to the drawings. First, in terms of configuration, reference numeral 1 shown in FIG. 1 is a conventionally well-known rotary tiller, which is connected to the rear part of the tractor 2 by a lower link 3, 3 and a top link 4 constituting a three-point link mechanism, 5, The lift rod 6 can be lifted and lowered by interlocking with the lift.

  The rotary tiller 1 has a so-called side drive configuration in which a tilling shaft 10 is supported between a transmission case 11 and a side plate 12 in which a transmission chain or the like is housed. Nail | claws 13 and 13 are arrange | positioned and a tilling part is comprised. The upper portion of the tillage portion is surrounded by the upper surface cover 14, the rear surface is surrounded by a rear cover 15 rotatably provided at the rear end portion of the upper surface cover 14, and the side surfaces are surrounded by side surface covers 16, 16 covering the left and right sides of the tillage shaft 10. . In addition, about the side plate cover 16, the main side surface cover 16a which comprises a part of rotary frame | frame frame with which the transmission case 11 was mounted | superposed, and the main case side cover 16a in the rear part of the transmission case 11 were mounted | worn with this main side cover 16a, and scattering of cultivation soil was prevented. It consists of a sub-side cover 16b.

  A gear transmission case 17 is provided at the center of the upper portion of the rotary tiller 1, and the rotational driving force of the PTO shaft 18 provided protruding from the rear portion of the tractor 2 is transmitted through the input shaft 19 to a group of transmission gears in the gear transmission case 17 (not shown). To be transmitted. And it is comprised so that it may transmit to the said transmission case 11 transmission mechanism via this transmission gear group 17 transmission gear group.

  A support frame 21 is provided at the bottom of the transmission case 11 toward the front. That is, the bolts 22 and 22 are fixed to the front portion of the main side cover 16a and exposed to the front side of the transmission case 11, and the front side is bent outwardly away from the tillage portion in plan view. Provided.

  Then, a saddle-shaped disk 24 is provided on the front side of the support plate 21 through a horizontal shaft 23 so as to be inclined in plan view so that the front end edge is located outside the tillage portion with respect to the rear end edge. Accordingly, the lower end of the disk 24 is set to be substantially the same height as the lower end of the reinforcing plate 11a placed on the lower end side of the transmission case 11 in the standard tillage work posture. Therefore, the disc 24 can act on the soil across the left and right width of the transmission case 11 in combination with the inclination. The horizontal shaft 23 is in the form of two large and small stepped bolts, which penetrate the boss 24a at the center of the disk 24, pass through the through hole 21a of the support frame 21 to the small diameter portion, and fasten with the nut 23a. Is supported in an idle manner.

  A rod-shaped barb intrusion prevention body 25 is provided from the vicinity of the horizontal shaft 23 portion of the disk 24 to the vicinity of the lower end portion of the transmission case 11. The moss intrusion prevention body 25 is integrally formed by welding means on a scraper bracket 26 that is bolted to the front lower portion of the support frame 21, and the reinforcing plate of the transmission case 11 is positioned from the position near the rotation center of the disk 24. 11a is arranged over the position near the lower end. That is, the front end of the rod-shaped rod entry preventing body 25 is curved and extends so as to surround the lower half of the boss portion 24a, and the rear end is extended to the lowermost end of the reinforcing plate 11a below the transmission case 11. The moss intrusion prevention body 25 configured as described above is provided so as to close the gap portion 27 formed between the transmission case 11 and the rear edge of the disk 24.

The scraper bracket 26 constitutes a scraper that scrapes off the adhering soil of the disk 24 with an edge 28 that approaches the convex curved surface of the disk 24.
When the cultivation work by the rotary cultivation apparatus 1 in the above example is started, the cultivation claws 13, 13... Of the cultivation section rotate and the soil is cultivated. In front of the transmission case 11, the disk 24 rotates and moves the soil and ridges inward at the front edge and guides them to the tilling portion, and digs up the front side of the transmission case 11 in advance to easily pass the transmission case 11. To do.

  By the way, the soot accumulates in the vicinity of the outer side of the disk 24 while being rotated with the disk 24, and eventually the disk 24 does not rotate and tries to collect in the gap portion 27 formed between the transmission case 11 and the rear edge of the disk 24. In this embodiment, since the rod-like moss intrusion prevention body 25 is provided at the space 27 between the disk 24 and the transmission case 11, the moss to be accumulated in the space 27 is prevented from entering the tilling portion from the outside. Prevents dredging accumulation.

  Since the front end of the rod-shaped rod entry preventing body 25 is in the vicinity of the center of rotation of the disk 24, it is possible to prevent the winding of the wrinkle around the front end as much as possible by positioning the front end at the position where the bag is most strongly pushed into the disk 24. In addition, the front end of the rod entry preventing body 25 is curved and extends so as to surround the lower half of the boss portion 24a. It can be done smoothly.

On the other hand, by extending the rear end of the rod-shaped rod entry preventing body 25 to the lower end of the transmission case 11, the rod entry prevention effect can be applied to the lower end of the transmission case 11.
The disk 24 rotates in response to the action in the soil and the soil adheres to it, but can be scraped off by the scraper edge 28, and does not obstruct the rotation of the disk 24 due to the soil adhesion, and the performance of the earthing is improved. It can continue well. Further, since the rod-shaped rod intrusion prevention body 25 is attached to the bracket 26 forming the scraper edge 28, the bracket 26 portion can also be used, and the trapping of the rod due to simplification of the structure is eliminated and the cost is reduced. Become.

  FIGS. 6 and 7 show a second embodiment of the mosquito intrusion prevention body, which is composed of a plate body and, together with the support plate 21, covers most of the interval portion 27 in a side view. Specifically, the moss intrusion prevention body 25A is formed integrally with the main side cover 16a, its front end is formed in an R shape so as to surround the lower half of the boss portion 24a, and its rear end is a transmission. The case 11 has a shape reaching a position near the lower end of the reinforcing plate 11a.

In the case of the third embodiment shown in FIGS. 8 and 9, the moss intrusion prevention body 25 </ b> B is molded integrally with the reinforcing plate 11 a that covers the lower part of the transmission case 11.
When configured as shown in FIGS. 6 to 9, the moss intrusion prevention bodies 25 </ b> A and 25 </ b> B can be combined with the support plate 21 to cover most of the space portion 27 in a side view, and the moss invasion is substantially eliminated. There is an effect that can be completely prevented. The main side cover 16a and the reinforcing plate 11a can be integrally formed, and the manufacturing and assembling operations can be simplified without requiring separate mounting configurations.

  In the above case, the moss intrusion prevention bodies 25A and 25B are formed using the main side cover 16a and the reinforcing plate 11a. However, the case plate member of the transmission case 11 may be extended.

  10 and 11 show a fourth embodiment in which the support frame 21 is extended to integrally form a moss entry prevention body 25C having a slightly narrower vertical width. Similar to the first embodiment, the disk 24 and the mosquito intrusion prevention body 25 can be attached and detached all at once by simply attaching and detaching the support plate 21, which is convenient for assembling work and maintenance work.

  In the above embodiment, the rotation of the disk 24 is provided in the idle state on the horizontal shaft 23 and is configured to rotate by being partially pulled into the soil and towed. It is also possible to improve the cutting and pushing action of the rods by transmitting the driving force to the horizontal shaft 23 that supports the disk 24 and forcibly rotating the disk 24. Moreover, it is good also as a structure which attaches the rod-shaped rod intrusion prevention body 25 to the transmission case 11 side, for example, is weld-fixed to the reinforcement board 11a.

  12 and 13 show a reference example, and a rotating disk 31 is provided on a shaft 30 concentric with the tilling shaft 10 outside the transmission case 11. The outer diameter of the rotating disk 31 acts slightly below the lower end of the transmission case 11 and is set to be shorter than the outer periphery of the tilling claw 13 rotation locus Z. If comprised in this way, the soot near the outer side of the transmission case 11, especially the lump which is going to accumulate by entanglement is pushed in and it can loosen, and the pushing-in of the accumulation soot by the transmission case 11 can be prevented. The rotating disk 31 may be driven or may be idle on the shaft 30. By arranging such a rotating disk 31 in parallel with the disk 24 and the moss intrusion prevention body 25, the lump can be prevented from being agglomerated.

Overall side view Side view of rotary tiller Top view of rotary tiller Enlarged sectional view of the disc Perspective view showing the disc mounted state Side view of a rotary tiller showing a second embodiment A plan view of a part of a rotary tiller showing a second embodiment Side view of rotary tiller showing third embodiment Plan view of a part of a rotary tiller showing a third embodiment Side view of a rotary tiller showing a fourth embodiment Plan view of a rotary tiller showing a fourth embodiment Side view of a rotary tiller showing a reference example Top view of a rotary tiller showing a reference example

DESCRIPTION OF SYMBOLS 1 Rotary plowing device 2 Tractor 10 Tilling shaft 11 Transmission case 21 Support frame 24 Disc 25 Mosquito intrusion prevention body 25A Moth invasion prevention body 25B Moth invasion prevention body 25C Moth invasion prevention body

Claims (1)

Provided on one side of the tillage part is a transmission case (11) that supports one end side of the tillage shaft (10) and is equipped with a transmission mechanism that rotates and links the tillage shaft (10), and is supported on the front side of the transmission case (11). The frame (21) is provided, and the support frame (21) is provided with a disk (24) that is inclined in a plan view and rotated about the horizontal axis so that the front end edge is located outside the tillage portion with respect to the rear end edge. From the position near the rotation center of the outer surface of the disk (24) to the position near the lower end of the transmission case (11), it is made of a rod or plate and is supported on the support frame (21) or supported on the lower end side of the transmission case (11). Rotary tillage device provided with a moss intrusion prevention body (25, 25A, 25B, 25C).

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