JPH1146501A - Rotary tilling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary tilling apparatus capable of realizing high-speed tillage through improving not only tillage tine strike driving force but also tilled soil lump removal effect by struck tine inversion. SOLUTION: This rotary tilling apparatus is so designed tilling tines 16 provided with left or light curved parts CL or CR succeeding to a basal straight part S are disposed virtually at equal intervals in the tilling axial direction and the tilling tines 16 with the same curved direction for the curved parts CL or CR are helically disposed in the tilling axial direction and radial direction with the phases shifted from one another; wherein a plurality of tilling tine curved parts are disposed so as to be equal in phase angle between the respective rows (a) to (s) of tilling tine arrangement in the tilling axial direction and the helical disposition of the tilling tines same in curved direction is designed to be adjacent in plural rows each.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tilling device mounted on an agricultural tractor.

[0002]

2. Description of the Related Art In recent years,
In order to satisfy the demand for high-speed tilling, rotary tilling devices have also been improved in cultivating claws (for example, see Japanese Unexamined Patent Publication No.
-84503). Meanwhile, regarding the influence of the driving force in the tilling operation, not only the driving force itself for driving the tilling nails but also the quality of the soil removal performance of the cultivated soil mass that is driven in reverse or the like is important. That is, the cultivated soil mass is moved backward while being inverted, so that the rotation is reduced and the driving force is reduced, but this tendency is remarkable in high-speed cultivation.

[0003] However, the improvement of the tilling nail or the increase in the number of driving times due to the increase in the number of nails at the same phase in the axial direction of the tilling axis does not necessarily take the above driving force into consideration. That is, conventionally, such a property of moving and discharging soil has not been improved so much, and this has been a cause of increasing driving horsepower.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a tilling claw having a bent portion left or right following a base straight portion.
A rotary tilling device arranged at substantially equal intervals in a cultivation axis direction, and cultivating claws having the same bending direction of the bending portion, helically arranged with a phase shifted in a cultivation axis direction and a radial direction. A plurality of spiral arranging of the cultivating claws for arranging the plurality of cultivating nail bent portions at equal phase angles between the respective rows of the cultivating claw array in the cultivating axial direction and the same bending direction. It is configured to be placed adjacent to the article.

[0005]

When the rotary tilling device 4 is moved while rotating the tilling shaft 13, the tilling claws are driven in order, tilling the soil, and inverting the earth mass. At this time, since a plurality of cultivating claw bent portions are arranged so as to have a uniform distribution phase angle between the respective rows of the cultivating claw array in the cultivating shaft 13 axis direction, the tilling between the respective rows is performed in order to advance at substantially equal speed. Since the pitches are substantially equal and the amount of soil mass associated with the driving action of each of the tillage claws is substantially equal even over the entire tillage width, vibration is reduced and the balance is favorably maintained, and variations in driving force are reduced. It should be noted that the number of drivings per rotation of the cultivation shaft is a plurality of times, that is, the number of installations of the bent portion of the cultivation claw, so that it is possible to cope with high-speed tilling.

In addition, a plurality of spirally arranged tilling nails having the same bending direction are arranged adjacent to each other, that is, each spiral ridge of the tilling nail having a left or right bent portion is
It is divided into spiral strips with the same bending direction (a, b, and c, d) and adjacent to each other. If it turns left, it will be diagonally left backward, so the cultivated soil mass by each spiral streak will be in the direction along this
Or, it is intended to move in the direction crossing this (in the case of C and D). Therefore, looking at the movement of the clod near the boundary of the spiral streak with different bending directions (near the boundary between the above-mentioned two streaks and the birth or near the boundary between the above two streaks and c), the moving direction of the clot near one of the boundaries Move in a direction away from each other, so that the movement of the mass is smooth without interference between the two struts, and in the vicinity of the other boundary, the flow of soil following the mass flow of the tilling claw spiral striation (b Although the mass flow of the driven spiral streak (C) interferes, the carrying state of the mass in the vicinity of the boundary collapses early, and the mass of the subsequent stave (C) merges with the mass of the preceding stave (B). This causes a backward movement. At this time, since a similar spiral strip (d) is adjacent to the subsequent spiral strip (c), the backward movement of the soil mass is promoted and the merger is smoothly performed.
The drive resistance is reduced, making it suitable for high-speed tillage and wide tillage.

[0007]

An embodiment of the present invention will be described with reference to the drawings. A rotary tilling device 4 is connected to a rear portion of the tractor body 1 by a top link 2 and a pair of left and right lower links 3 and 3 so as to be able to move up and down. Numerals 5 and 5 are hydraulic lift arms connected to the left and right lower links 3 and 3 to move the rotary tillage device 4 up and down.

The rotary tilling device 4 employs a so-called side drive type, and a mast 8 for connecting the top link 2 is provided above a central transmission portion 7 of the tilling device 4, and cylindrical frames 9 and 10 are provided on the left and right. It is extended. A transmission case 11 containing a transmission chain, a sprocket, and the like is connected to the cylindrical frame 9. On the other hand, the other frame 10
, A support plate 12 is mounted. A tilling shaft 13 is provided on the portal frame formed by the left and right cylindrical frames 9 and 10, the conductive case 11 and the support plate 12.
In a horizontal position.

For power transmission to the tilling shaft 13, the driving force of the PTO shaft 14 protruding from the rear of the tractor body 1 is input to the input shaft 15 of the central transmission unit 7, and then the central transmission unit 1 is driven.
The transmission is performed via the internal transmission mechanism 1, the cylindrical frame 9, and the internal transmission mechanism in the transmission case 11. Tilling shaft 1
To 3, a plurality of cultivating claws 16, 16 ... forming the straight bend to the left or right direction toward tip side from S C _L or C _R of the base side, an equal distribution of the axial direction of the cultivating shaft 13 divided and at each site, arranging a pair destined for the bent portion C _L and C _R. In the illustrated example, 17 columns (a to s) are set in the axial direction. The nails arranged in the rows a and s at the left and right ends are nails of the same form, but one each.

[0010] disposed of the cultivating shaft 13 is bent portion C _L and C _R of tilling claws adjacent overlap in the moving direction of the machine body 1 to cultivator 4, cultivating pitch P of the driving action is substantially the same as the In this case, the phase of the mounting in the rotation direction is shifted by 180 degrees. The bases of the claws 16 are fitted to holders 17, 17... Provided on the outer circumference of the tilling shaft 13 and fixed with bolts or the like. These holders 17, 17. There are two types of holder angles (relative angles) for one pair,
Every other is the same, and adjacent ones are set at different angles. For example, the division setting columns b, d, f.
Holders 17, 17 with the angle set as small as about 70 degrees
However, holders 17, 17 whose angles are set as large as about 110 degrees are arranged in the divided setting rows c, e. Note that these angles are appropriately set according to the number of claws according to the difference in tillage width. Are the same.

The attachment of the holder to the tilling shaft 13 is performed by bending
C_LOr C_RShifts claws in the same direction in the direction of the tilling axis
And are arranged spirally (FIG. 1). That is, the spiral shape in FIG.
The rows of I to D are arranged.
Then the tilling claw 16 is bent C _RBut in the articles of Ha and D
Bar C_LAre arranged respectively. Note that t is the tillage axis 1
3 Distance traveled by one rotation (for example, t = about 300 mm)
Represent.

The upper surface of the tilling shaft 13 constructed as described above is covered with an upper surface cover 21 and the rear surface is covered with a rear cover 22. The rear cover 22 is connected to the fixed upper surface cover 21 as follows. Have been. That is, the rear cover 22 is connected to the upper cover 21 via a flexible connector 23 made of a thick rubber plate, and the upper cover 2
1 between the rear end left and right and the central part and the central part and the left and right of the rear cover 22, a connecting arm 24 and an elastic connecting plate 25 made of an elastic strip are arranged so as to allow a predetermined degree of freedom in vertical and horizontal directions. , 25. Connection arm 24
On the top cover 21 side, is pivotally attached with a connecting pin 26 so as to be rotatable up and down or to allow a slight left and right swing, and on the rear cover 22 side, is branched left and right and fixedly connected to the rear cover 22. This is a configuration having forked portions 24a, 24a. On the other hand, the left and right elastic connection plates 25, 25
Both ends are slightly curved upward, and the rear cover 22 is fixed to the respective covers 21 and 22 with the rear cover 22 under pressure.

Reference numerals 27, 27 denote pressure rods. The upper ends of the pressure rods are rotatably connected to the top ends of hangers 28, 28 pivotally connected to the upper cover 21 so as to be pivotable about a horizontal axis. The lower end is a forked portion 24a of the connection arm 24,
24a is loosely fitted into the through holes of the receiving seats 24b, 24b. 29 is a pressure spring 30 wound around the rod 27
The position of the rod 27 can be changed and adjusted arbitrarily in the axial direction.

One end of the hanger 28 is connected to the distal end of a piston portion of a hydraulic cylinder mechanism 31 so that the distal end side of the hanger 28 can be vertically pivotally adjusted on the basis of the base portion based on the expansion and contraction operation of the piston. 32, 32 are side covers.
The operation of the above example will be described.

When the vehicle 1 travels while rotating the tilling shaft 13, the field is tilled by the driving action of the tilling claws 16, 16,. In FIG. 1, two rows of r-row claws 16 ₁ , m
Row C nail 16 ₂ , g row B nail 16 ₃ , b row b nail 1
6 ₄ , two rows of p-row claws 16 ₅ ... Tilling claws 16 (a) and (b) shall, for tilling claws group disposed in these conditions are those comprising both bent portion C _R, tilling soil mass It will Hanedasa while inverted rearward obliquely right toward And Tilling claws group Ha Article and Nijo Conversely, includes a bent portion C _L, tilling soil mass is Hanedasa while inverted obliquely rearward left toward.

[0016] For example tilling claws 16 ₂₇ b Article but Hanedasu its implantation by tilling soil mass behind obliquely right toward, Hanedasu at immediately before has tilling claws 16 ₁₆ or 16 ₂₃ Similarly tilling soil mass behind obliquely right toward Therefore, the cultivated soil mass by the cultivating nail group of the ridge or the ridge moves to the right rear side. On the other hand, for example, by cultivating claws 16 ₁₇ of two Article implanted its Hanedasu the tillage clods rearward obliquely left toward, but immediately before the tilling claws 16
Similarly, since ₁₀ or 16 ₁₄ also jumps out the tilling soil block diagonally rearward and leftward, the cultivating soil mass by the ridges of the ridges or the two ridges tends to move to the left rear side.

[0017] Therefore, the movement direction of the earth mass is near the boundary between the two lines and the line A, and the movement of the earth mass is smooth without mutual interference between the two lines. In addition, near the boundary between the ridge and the crest, the clot flow of the crust interferes with the clot flow of the ridge, but near the boundary, the carrying state of the clot collapses early, and the clot of the crest has a flow of the clot of the ridge. And a backward movement occurs. In particular, since the c-shaped strip and the d-shaped strip are provided in a plurality of strips, the leftward rearward movement of the soil mass is promoted as compared with the single strip, and the merging becomes smooth.

[0018] The above tilling, in between equidistantly each column of cultivating shaft 13, since disposing the pair addressed to bend C _L and C _R of tilling claws 16, between the columns in cultivating shaft 13 one revolution Is cultivated twice at the same pitch, but since the amount of soil lumps associated with the action of driving these claws is substantially equal, the vibration is reduced and the balance is favorably maintained. The cultivated soil mass is about to be guided backward, and is pressed by a rear cover 22 that follows the cultivated surface. The rear cover 22 is connected via a flexible connecting member 23 made of a rubber plate and elastic connecting plates 25, 25. Since it is connected to the upper surface cover 21, it can swing right and left within a predetermined angle range with respect to the upper surface cover 21, and the followability to the plowing surface is ensured. It can follow high-speed tillage well.

At least the left and right elastic connection plates 25, 25 connecting the upper cover 21 and the rear cover 22 allow the rear cover 22 to swing left and right or forward and backward with respect to the upper cover 21 as described above. A fixing device (for example, a bracket 34 on the upper cover 21 side and a rear cover 22 side on the upper surfaces of the elastic connection plates 25, 25, which is fixed to a fixed length) for each mounting portion of the elastic connection plates 25, 25 to the upper cover 21 and the rear cover 22. Removable U-shaped connectors 36, 36) are provided between the bracket 35 and the movement of the elastic connection plates 25, 25, so that the left and right swing of the rear cover 22 can be locked. It is possible to secure the property.

The left and right elastic connecting plates 25, 25 are bent upward to provide the rear cover 22 with pressure, and a predetermined range until the pressure springs 30 of the pressure rods 27, 27 act. In the case of, the function such as burying is exhibited by the weight of the rear cover 22 and the pressing force of the elastic connecting plates 25, 25. However, sometimes the pressing force is excessive or inappropriate, and this is changed. The configuration shown in FIG. That is, the rear cover 22 is attached to the upper cover 21 so as to be swingable up and down or left and right, and the elastic connecting plate 2 is provided between the upper cover 21 and the rear cover 22.
5 and 25 are provided to make the rear cover 22 freely pressurized.
By adopting a configuration in which the pressing force is arbitrarily or automatically adjustable, the crushing function can be changed and adjusted to a large or small size, so that the crushing amount can be appropriately adjusted according to a work form such as a scraping work or a normal plowing work. . In the illustrated example, a telescopic mechanism such as a hydraulic cylinder mechanism 37 is formed at each base of the elastic connecting plates 25, 25, and the pressing force can be changed by expanding and contracting according to the working mode. Elastic connecting plate 2
The fifth substrate 38 is rotatably connected to a bracket 39, one end of the hydraulic cylinder mechanism 37 is pivotally supported on the other end of the substrate 38, and the other end is pivotally supported on the upper cover 21 side. In addition, the expansion and contraction adjustment is, for example, linked to the adjustment position of the cultivation depth adjustment dial. When the cultivation depth is set to a shallow side, the hydraulic cylinder mechanism 37 contracts and the pressing force is small, and the operation for setting to a deep side is extended and applied. The pressure may be returned to the standard. Further, a configuration based on changing means such as a switch separately providing the expansion and contraction adjustment may be adopted.

In addition, when the rear cover 22 is in a slightly upright posture during the tilling and leveling work, and there is difficulty in leveling the lower edge thereof, the unevenness of the surface due to, for example, dragging a rice plant or the like is reduced. In such a case, the above problem can be solved by operating the hydraulic cylinder mechanism 31 to slightly raise the rear cover 22 and lifting the lower edge to continue the operation.

[Brief description of the drawings]

FIG. 1 is an operation explanatory view.

FIG. 2 is a side view of the rotary tillage device.

FIG. 3 is a perspective view of a rotary tillage device.

FIG. 4 is an enlarged perspective view of a tilling part.

FIG. 5 is a sectional view of a tilling shaft.

FIG. 6 is an enlarged side sectional view of a connecting portion between an upper cover and a rear cover.

FIG. 7 is a view showing another embodiment of the above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tractor body, 2 ... Top link, 3, 3 ... Lower link, 4 ... Rotary tilling device, 5, 5 ... Hydraulic lift arm, 7 ... Central transmission part, 8 ... Mast, 9, 10 ... Cylindrical frame, 11 ... Transmission case, 12 ... Support plate, 13 ...
Cultivating shaft, 14 ... PTO shaft, 15 ... input shaft, 16 ... tilling claws, C _L, C _R ... bent part, 17 ... holder, 21 ... top cover, 22 ... rear cover, 23 ... flexible connection member, 24 ...
Connection arm, 25: elastic connection plate, 26: connection pin, 27
... Pressing rod, 28 ... Hanger, 29 ... Receiver, 30 ... Pressing spring, 31 ... Hydraulic cylinder mechanism, 32 ... Side cover, 33 ... Tooth body

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tsune Takahashi 1st Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. (72) Inventor, Seiji Kinami, 1-Yachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A tilling claw having a bent portion formed to the left or right following the base straight portion is disposed at substantially equal intervals in the direction of the tilling axis, and the cultivating claws of the bent portion having the same bending direction are cultivated. A rotary tilling device that is helically arranged with a phase shifted in the axial direction and the radial direction, wherein a plurality of cultivating claw bent portions have an equal distribution phase angle between each row of the cultivating claw arrays in the cultivating axial direction. A rotary tilling device, wherein a plurality of spiral tilling claws having the same bending direction are arranged adjacent to each other.