JPH0567201U - Rotary tiller - Google Patents

Abstract

(57) [Summary] [Purpose] The uncultivated land in the power transmission case and the recesses in the power transmission case passage can be removed to obtain a flat and clean finish, and the tilling posture can damage the plow and consume horsepower. It is an object of the present invention to provide a rotary tiller which is excellent in design without causing any trouble. [Structure] In a side drive rotary, a transmission case 11 in which a ski 18 having a ski width that extends over substantially the entire width of the case 11 is fixed to the front surface is provided within the width of the rotary cover 17, and the lowermost portion P of the ski 18 is set to the plowing claw rotation locus. The guide plate 21 is set at substantially the same height as the lower point Q and near the center of rotation of the plowing claws 13 and 13a, and the rear portion of the transmission case 11 extends from the inner surface of the case to the outer edge of the rear end of the main cover 15.
Covered with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a side-drive rotary type rotary tiller having a transmission case disposed on one side of a rotary cover.

[0002]

[Prior Art]

 Depending on the mounting position of the transmission case that drives the pawl shaft, the rotary cultivator has a center drive system in which the transmission case is attached to the middle of the pawl shaft in the longitudinal direction, and a pawl shaft is mounted on one side of the rotary cover. It is roughly divided into a side drive system (side drive rotary) in which the power of the shaft is introduced from one end side of the pawl shaft, but the side drive system does not have a transmission case within the plowing width and the ridges are clean. It is often used because of its advantages such as finishing.

[0003]

[Problems to be solved by the device]

 However, as shown in FIG. 7, the side drive rotary is generally mounted in a state in which the transmission case (a) is extended to the outside of the rotary cover (main cover) (b). There are drawbacks. In other words, during plowing, the width of the transmission case (a) remains as uncultivated land, and after plowing, a recess (a in Fig. 5) is created in the passage mark of the transmission case (a), and the ridge (c) is flat and even. It is not finished in a uniform shape, and during deep tillage work, the lower part of the transmission case (a) is pushed by the soil in the uncultivated land, increasing the earth pressure resistance and increasing horsepower loss.

[0004]

[Means for Solving the Problems]

 The present invention has been made based on the above situation, and in a side drive rotary in which the transmission case is arranged on one side of the rotary cover, the transmission case is provided within the width of the rotary cover. A ski having a clearance width that extends over almost the entire width of the transmission case is fixed to the front surface of the power transmission case, and the lowermost end of the ski is set to be approximately the same height as the lowest locus of the rotation path of the tilling pawl and near the center of rotation of the tilling pawl. At the same time, the gist is that the rear surface side of the transmission case is covered with a guide plate that gently inclines or curves from the inner surface side of the case to the vicinity of the rear outer end of the main cover.

[0005]

[Action]

 The soil scraped off by skid and moved to the inside of the transmission case is crushed by the plowing claws, and is then jumped rearward and outward by the outward plowing claws, and is smoothly moved to the outside by the guide plate to pass the transmission case. Since it is backfilled in the trace (recess), there is no trace of passage of the transmission case after plowing. In addition, since the depth of tillage of both the ski and the tiller is maintained at approximately the same height in both shallow and deep tillage, the tiller is not damaged and horsepower is not consumed to the person, and after tilling, it is even. A flat and beautiful finish is obtained.

[0006]

【Example】

 The structure of the present invention will be described with reference to an embodiment shown in the drawings. A side-drive type hitch frame 5 is mounted behind a tractor (this machine) 1 via a lower link 2, a top link bracket 3 and a top link 4. The rotary 6 is detachably connected. The rotary 6 is on the left side in the traveling direction of the pipe frames 9 and 10 extending on both sides from a central gear case 8 to which power is transmitted from the PTO shaft 7 of the machine 1 through a universal joint shaft (not shown). The transmission case 11 and the side plate 12 are fixed to the right side and the right side, respectively. Then, between the lower part of the transmission case 11 and the side plate 12, a claw shaft 14 having cultivating claws 13 and 13a attached is rotatably mounted. Reference numeral 15 denotes an arc-shaped main cover, and a rear cover 16 having the same width as the main cover 15 is pivotally supported at its rear end through a fulcrum pin 16a so as to be vertically rotatable. The main cover 15 and the rear cover 16 serve as a rotary cover. 17 is formed.

By the way, the transmission case 11 is arranged in a state of being bitten into the width of the rotary cover 17. That is, the transmission case 11 is provided within the width of the main cover 15 as shown in FIGS. 2 and 3, and the front surface 11a of the transmission case 11 has a ski 18 having a ski width that extends over substantially the entire width of the transmission case 11. Are fixed by a direct attachment method via a bracket 19 and a mounting bolt 20. Since the ski 18 is mounted using the front surface 11a of the transmission case 11 which is originally formed to be robust, the mounting portion of the ski 18 requires a small space and a simple mounting structure, but has a sturdy mounting structure. ing. On the other hand, the lowermost end P located on the rear side of the ski 18 has substantially the same height as the lowest locus Q of the rotation loci of the plowing pawls 13 and 13a, and the rotation center of the plowing pawls 13 and 13a (the axis of the pawl shaft 14). ) It is set closer (see FIGS. 1 and 4). The rear surface 11b side of the transmission case 11 is covered with a guide plate 21 that gently inclines or curves from the case inner surface 11c side to the vicinity of the rear outer end of the main cover 15. The guide plate 21 is integrally fixed to the transmission case 11 in a state of being extended from the lower surface of the main cover 15 to an appropriate height below the pivotal connecting portion of the main cover 15 and the rear cover 16. 22 is a side cover. In the figure, reference numeral 23 is a transmission case, 24 is a hydraulic case, 25 is a hydraulic lift arm, 26 is a toolbar, and 27 is a cultivated soil mass.

By the way, at the time of standard or deep plowing work, the tip of the ski 18 is at a position slightly higher than the lowest point Q of the rotation loci of the plowing pawls 13 and 13a as shown in FIG. Since the rear part of the ski 18 (the lowermost end P) is substantially at the same height as the lowest point Q of the plowing claw rotation locus, the plowing depth of the ski 18 and the plowing claws 13 and 13a are substantially the same. The relative height between the ski 18 and the tilling claws 13 and 13a is maintained in the same manner as above even during shallow tillage as shown in FIG. Therefore, the tilling depths of both the ski 18 and the tilling claws 13 and 13a are maintained at substantially the same depth both in the case of shallow tillage and in the case of deep tilling, so that even if the tilling posture of the rotary 6 changes, the tiller (see FIG. 6). It is possible to obtain a uniform and beautiful ridge E finish without damaging D) or exhausting horsepower. Further, the soil scraped off by the ski 18 is moved to the inside of the transmission case 11 along the inclined surface 18a of the ski 18, then is crushed by the plowing claws 13 and 13a, and is rearward by the outward plowing claw 13a. While being jumped outward, it is smoothly guided to the outside by the guide plate 21 and backfilled in the passage mark (recess) of the transmission case 11, so that the passage mark of the transmission case 11 (see FIG. 5) is the same as in the conventional rotary. a) does not remain. Further, since the adhesion of the soil to the transmission case 11 especially on the rear surface 11b side of the case is eliminated, it is easy to clean up the soil after the work is finished. When the rotary 6 is removed from the hitch frame 5, the ski 18 serves as a stand and prevents the rotary 6 from falling forward and backward.

[0009]

[Effect of the device]

 Since the present invention is configured as described above, the cultivated area of the transmission case is eliminated when cultivating, and the traces of passage of the transmission case can be backfilled evenly. Both the shallow and deep tillage depths can be maintained at approximately the same height without damaging the tiller, and the guide plate smoothly moves the tilled soil mass from the outward facing claws to the outside. Since it is possible to obtain a flat and clean finish, there is little consumption of horsepower, and the transmission case etc. does not project to the outside of the rotary cover, it is also excellent in design and it is possible to further increase the commercial value. Became.

[Brief description of drawings]

FIG. 1 is a side view showing the operation of the present invention during shallow plowing.

FIG. 2 is a plan view of a rotary.

FIG. 3 is a plan view of a main part.

FIG. 4 is a side view showing the operation of the present invention during deep plowing.

FIG. 5 is a sectional view of a field cultivated by a conventional side drive rotary.

FIG. 6 is a sectional view of a field cultivated according to the present invention.

FIG. 7 is a plan view of a conventional side drive rotary.

[Explanation of symbols]

 11 Transmission Case 13 Cultivating Claw 13a Cultivating Claw 14 Claw Shaft 15 Main Cover 16 Rear Cover 17 Rotary Cover 18 Suki 21 Guide Plate P Bottom Edge of Skip Q Rotation Locus Bottom Point of Claw

Claims (1)

[Scope of utility model registration request] 1. A side drive rotary in which a transmission case is disposed on one side of a rotary cover, wherein the transmission case is provided within a width of the rotary cover, and a front surface of the transmission case has a clearance width that is substantially the entire width of the transmission case. And the bottom end of the ski is set at the same height as the lowest point of the rotary locus of the plowing pawl and near the center of rotation of the plowing pawl, and the rear side of the transmission case is set from the inner side of the case to the main cover. A rotary tiller, characterized by being covered with a guide plate that gently inclines or curves toward the rear outer end.