Rotary tilling device

Abstract

To provide a rotary tilling device that does not require a complicated control and a complicated structure and can suppress variation of tillage depth.SOLUTION: A rotary tilling device includes: a rotary including a plurality of rotary blades that rotate; and a tillage depth stabilizing tool that stabilizes a depth of tilling. The tillage depth stabilizing tool includes: two fixation tools installed in each of both end sides of the rotary extending downward; and a blade part attached to a distal end of the fixation tools and including a blade surface inclined toward travel direction downward of the rotary tilling device in a state where the rotary tills the ground. When the rotary tills the ground, the distal end of the blade part in the travel direction is on the travel direction side from a rotary circle of the rotary blade.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a rotary tillage device. [Background technology]

[0002] Various tillage devices have been developed for tilling land. For example, rotary tillers are mounted on the rear of a tractor and are configured to till the land by rotating the rotary blades. Such rotary tillers generally till the land by pressing the rotary blades against the land with their own weight, which has the problem of causing variations in tillage depth (hereinafter simply referred to as tillage depth) depending on the speed of the tractor pulling the tiller.

[0003] To solve such problems, for example, a rotary tiller is known in which, in a tractor having a rear cover sensor that detects unevenness in the ground, a tillage depth setting dial that sets the target tillage depth, a traveling speed detection sensor that detects the vehicle speed, a tillage device, and a controller that feeds back the output of the detection and controls the lifting mechanism to achieve the target tillage depth set by the tillage depth setting means, the lift arm of the tillage device is raised and lowered with a narrow, constant dead band when the vehicle speed is below set speed A, and a wide, constant dead band when the vehicle speed is above set speed B, and the dead band is changed depending on the vehicle speed between set speed A and set speed B (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-320251 Summary of the Invention [Problem to be solved by the invention]

[0005] However, while conventional rotary tillers can control tillage depth, they have problems such as complex control and high cost of the equipment itself, as well as a complex structure that makes maintenance cumbersome.

[0006] Therefore, an object of the present invention is to provide a rotary tiller that can suppress variations in tillage depth without requiring complex control or a complex structure. [Means for solving the problem]

[0007] The present invention includes: a rotary having a plurality of rotating rotary blades; A tilling depth stabilizing device that stabilizes the tilling depth and The tillage depth stabilization device is installed on both ends of the rotary, respectively, and has two fixing devices extending downward, and a blade portion attached to the tip of the fixing device, and having a blade surface inclined downward in the direction of travel of the rotary tiller when the rotary is tilling the ground. When the rotary tills the ground, the tip of the blade in the traveling direction is located on the traveling side of the rotation circle of the rotary blade. It is a rotary tillage device. [Effects of the Invention]

[0008] It is possible to provide a rotary tiller that can suppress variations in tillage depth without requiring complex control or a complex structure. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a side view showing a preferred embodiment of a rotary tiller of the present invention. [Figure 2] 2 is a perspective view of a tillage depth stabilizing device provided in the rotary tiller shown in FIG. 1. FIG. [Figure 3] 2A is an enlarged side view of a tillage depth stabilizing device provided in the rotary tiller shown in FIG. 1, and FIG. 2B is an enlarged longitudinal cross-sectional view taken along the line AA'. DETAILED DESCRIPTION OF THE INVENTION

[0010] A preferred embodiment of the rotary tiller of the present invention will be described in detail below. Figure 1 is a side view showing a preferred embodiment of the rotary tiller of the present invention, Figure 2 is an oblique view of a tillage depth stabilizing device provided on the rotary tiller shown in Figure 1, and Figure 3 is an enlarged side view (a) and A-A' longitudinal cross section (b) of the tillage depth stabilizing device provided on the rotary tiller shown in Figure 1.

[0011] In this embodiment, the rotary tiller 1 is used by being towed by a tractor 2 as shown in Fig. 1, but is not limited to this. The rotary tiller 1 has a rotary 3 having a plurality of tillage tines (rotary blades) 31, and tillage depth stabilization devices 4 installed on both ends of the rotary 3 (both ends in the vehicle width direction of the tractor 2). The rotary tiller 1 according to this embodiment also has a link 5 for connecting to the tractor 2, a power take-off shaft 6 that transmits power from the tractor 2 to the rotary 3, and a gauge wheel 7 attached in front of the rotary 3. The rotary tiller 1 is also hydraulically movable up and down.

[0012] The rotary 3 has a plurality of tillage tines 31, a chain case 32 provided at one end of the rotary 3 in the width direction, a bearing unit (not shown) provided at one end of the rotary 3 in the width direction, and two side plates 33 provided at both ends. The plurality of tillage tines 31 are configured to rotate around an axis. The chain case 32 is equipped with a drive unit equipped with a chain, and power from the power take-off shaft 6 is transmitted to the drive unit inside the chain case 32 to rotate the tillage tines 31. A leveling plate (not shown) is provided between the two side plates 33. Examples of the tillage tines 31 include hatchet tines, L-shaped tines, star-shaped tines, and forward / reverse tines. The rotary blades are not limited to the tine-shaped ones shown in the drawings and may be, for example, disk-shaped. In other words, the rotary 3 may be a disk rotary.

[0013] The tillage depth stabilization devices 4 are provided on both ends of the rotary 3 (the chain case 32 side and the opposite bearing side, i.e., both ends in the vehicle width direction of the tractor 2). As shown in FIGS. 2 and 3 , the tillage depth stabilization devices 4 have a fixing device 41 and a cutting edge 42. The fixing device 41 is a rod-shaped member that extends downward and is attached to the rotary 3 by a mounting member near the end of the rotary 3 in the traveling direction of the tractor 2. The cutting edge 42 has a cutting edge surface 421 at the tip on the lower side of the fixing device 41. As shown in FIG. 1 , the cutting edge 42 has the cutting edge 421 that is inclined downward in the traveling direction of the rotary tiller 1 (hereinafter simply referred to as the traveling direction) when the rotary tiller 1 is tilling the ground. Furthermore, the cutting edge of the cutting edge 42 on the traveling direction side is configured to be located closer to the traveling direction than the rotation circle of the tiller tines (rotary blades) 31, i.e., the circle described by the tips of the tiller tines 31. With this configuration, the rotary tiller 1 can be prevented from lifting up even when the speed of the tractor 2 is increased. As a result, variation in tillage depth due to the speed of the tractor 2 can be reduced without the need for complex control. Furthermore, it is preferable that the tip of the blade 42 on the traveling direction side of the blade 42 is closer to the ground than the rotation circle of the tiller tines 31, i.e., the circle described by the tip of the tiller tines 31. This makes it possible to more effectively reduce variation in tillage depth due to the speed of the tractor 2. In the illustrated configuration, the fixing device 41 is attached to the side of the chain case 32 and the bearing unit, but the attachment position is not limited thereto and the fixing device 41 may be attached to any other location.

[0014] When viewed from the side of the rotary 3, the angle θ1 (θ1 shown in FIG. 3(a)) between the blade surface 421 and the fixture 41 is preferably 95 to 130°, more preferably 100 to 120°, and even more preferably 105 to 115°. This makes it possible to more effectively prevent the rotary tiller 1 from lifting up. Furthermore, the angle θ2 between the blade surface and the fixing device in the A-A' vertical cross section of the tillage depth stabilizing device 4 (a vertical cross section in the width direction of the rotary tiller 1) is preferably 95 to 130°, more preferably 100 to 120°, and even more preferably 105 to 115°. This makes it possible to more effectively prevent the rotary tiller 1 from lifting up.

[0015] The maximum length L1 of the cutting portion 42 is preferably 70 to 180 mm, and more preferably 80 to 170 mm. The maximum length L1 of the cutting portion 42 may be different between the chain case 32 side and the bearing side. In this case, the maximum length L1 of the cutting portion 42 on the chain case 32 side is preferably 90 to 180 mm, and more preferably 110 to 170 mm, and the maximum length L1 of the cutting portion 42 on the bearing side is preferably 70 to 140 mm, and more preferably 80 to 120 mm. The maximum width W1 of the cutting portion 42 is preferably 20 to 80 mm, and more preferably 30 to 70 mm, and even more preferably 40 to 60 mm.

[0016] The width of the blade 42 may be gradually reduced in the direction of travel. The length of the blade 42 may be gradually reduced inward in the width direction of the rotary 3. This makes it easier for the tip of the blade 42 to sink into the ground, and more effectively prevents the rotary tiller 1 from lifting up due to speed.

[0017] The gauge wheel 7 is attached to the rotary tiller 1 by a gauge wheel holder 71. The height of the gauge wheel 7 can be adjusted by changing the position of a hole provided in the gauge wheel holder 71. By adjusting the height of the gauge wheel 7, the tilling depth can be adjusted.

[0018] Although the rotary tiller 1 of the present invention has been described above based on a preferred embodiment, the present invention is not limited to this. [Explanation of symbols]

[0019] 1 Rotary tiller 2 Tractors 3 Rotary 31 Tiller blade (rotary blade) 32 Chain case 33 Side panel 4 Plowing depth stabilization equipment 41 Fixtures 42 Blade part 421 Blade surface 5 Links 6 Power take-off shaft 7 gauge wheel 71 Gauge Wheel Holder

Claims

1. a rotary having a plurality of rotating blades; A tilling depth stabilizing device that stabilizes the tilling depth and The tillage depth stabilization device is installed on both ends of the rotary, respectively, and has two fixing devices extending downward, and a blade portion attached to the tip of the fixing device, and having a blade surface inclined downward in the direction of travel of the rotary tiller when the rotary is tilling the ground, When the rotary tills the ground, the tip of the blade in the traveling direction is located on the traveling side of the rotation circle of the rotary blade. Rotary tillage equipment.

2. When the rotary tills the ground, the tip of the blade in the traveling direction is located on the ground side of the rotation circle of the rotary blade. The rotary tillage device according to claim 1 .

3. When viewed from the side of the rotary, the angle θ between the blade surface and the fixture １ is 95 to 130 degrees The rotary tillage device according to claim 1 .

4. The angle θ between the blade surface and the fixing tool in the A-A' longitudinal section of the tillage depth stabilization tool ２ is 95 to 130 degrees The rotary tillage device according to claim 1 .

5. The maximum length L of the blade １ is 70 to 180 mm The rotary tillage device according to claim 1 .

6. The maximum width W of the blade １ is 20 to 80 mm The rotary tillage device according to claim 1 .

Images