NL192769C - Soil cultivation machine. - Google Patents

Soil cultivation machine. Download PDF

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Publication number
NL192769C
NL192769C NL8400104A NL8400104A NL192769C NL 192769 C NL192769 C NL 192769C NL 8400104 A NL8400104 A NL 8400104A NL 8400104 A NL8400104 A NL 8400104A NL 192769 C NL192769 C NL 192769C
Authority
NL
Netherlands
Prior art keywords
active
rotation
working
axis
curvature
Prior art date
Application number
NL8400104A
Other languages
Dutch (nl)
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NL8400104A (en
NL192769B (en
Original Assignee
Lely Nv C Van Der
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lely Nv C Van Der filed Critical Lely Nv C Van Der
Priority to NL8400104A priority Critical patent/NL192769C/en
Priority to NL8400104 priority
Publication of NL8400104A publication Critical patent/NL8400104A/en
Publication of NL192769B publication Critical patent/NL192769B/en
Application granted granted Critical
Publication of NL192769C publication Critical patent/NL192769C/en

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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01BSOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B33/00Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
    • A01B33/08Tools; Details, e.g. adaptations of transmissions or gearings
    • A01B33/10Structural or functional features of the tools ; Theoretical aspects of the cutting action
    • A01B33/106Structural or functional features of the tools ; Theoretical aspects of the cutting action the rotating shaft being oriented vertically or steeply inclined
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01BSOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B33/00Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs
    • A01B33/06Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on vertical or steeply-inclined shaft
    • A01B33/065Tilling implements with rotary driven tools, e.g. in combination with fertiliser distributors or seeders, with grubbing chains, with sloping axles, with driven discs with tools on vertical or steeply-inclined shaft comprising a plurality of rotors carried by an elongate, substantially closed transmission casing, transversely connectable to a tractor

Description

1 192769

Soil cultivation machine

The invention relates to a soil tillage machine for the preparation of a seed bed, provided with a frame containing a number of tillage members which can be rotatably rotatable about at least substantially vertical rotary axes, each of which is provided with two separate, extending downwards from the axis of rotation arranged in rigid movement elements, which have a strip-shaped active part, wherein, calculated in the direction of rotation of the working members, the front of the active part increases in thickness backwards and wherein the active element running tangentially with respect to the axis of rotation part is twisted about its straight longitudinal axis 10, such that the front of the active part is located at a greater distance from the axis of rotation than the rear.

Such a machine is known from Dutch laid-open specification 7700515. The machine described herein has machining members driven by rotors, which are driven as rotors, and which have downwardly extending machining elements, which have a knife-shaped form.

These straight blade-shaped machining elements are arranged on the rotors such that the elements are slightly rotated relative to a tangential position relative to the turning circle, such that the front of the machining elements are located at a greater distance from the axis of rotation than the rear. These working elements are suitable for hard soil conditions.

The drawback of this known construction is that the crumbling of the working elements of the soil is not optimal, and that resistance to deformation is too small, especially on stony soils.

The object of the invention is to provide a working element which is improved compared to the above-described working element, at least under certain soil conditions, while retaining a good penetration into the soil, has an improved crumbling and a higher strength.

According to the invention, this object is achieved in that each strip-shaped active part of these machining elements on its side facing the axis of rotation of the associated machining member, while maintaining the straight longitudinal axis, from its free end over at least a major part of its length this axis of rotation has a concave curved direction, the side of that active part remote from the axis of rotation extending concentrically from its free end over the same part of the length relative to the concave course of the side facing the axis of rotation.

In a further specific embodiment, the radius of curvature of the concave curved side of the active part is smaller than the radius of the largest circle described by a machining element during a rotation of a machining member. Due to the concave course of the active part with respect to the largest circle described by a working element during a rotation, the crumbling of the earth is intensified.

In a special further embodiment of the invention, the radius of curvature of the concave curved side of the active part increases towards the free end of the active part. This has the effect that the tooth maintains a very high flexural strength over its entire length.

To this end, in a preferred embodiment, the radius of curvature of the concave curved side increases from 10 to 12 cm.

On the one hand, this construction of the working elements ensures that the crumbling of the soil is intensive, whereby less energy is required than with the above-described knife-shaped working elements.

On the other hand, due to their curved shape, these machining elements are stronger than the flat, knife-shaped machining elements and are more resistant to impact.

45 It is noted that from the Netherlands patent application 7409705 a soil cultivation machine is known with soil cultivating members rotatingly driven by vertical axes with working elements, which are rigidly shaped and are twisted about their longitudinal axis at their position of attachment to the soil cultivating members, such that the front side of the active part is located at a greater distance from the axis of rotation than the rear thereof, so that the clods are not smeared by the 50 rear sides of the processing elements. However, the working elements are resilient to absorb shocks and are therefore less suitable for hard ground conditions.

Compared to the machine according to the prior art, the working elements according to the invention provide an optimum impact effect of the earth, and thus a very good crumbling.

55

The invention will be explained in more detail below with reference to an exemplary embodiment shown in the drawing.

192769 2

Figure 1 is a top view of a soil cultivating machine provided with movement elements according to the invention.

Figure 2 is a larger-scale view taken along line II-II in Figure 1.

Figure 3 shows a view along the line III-III in Figure 2.

Figure 4 shows a view along the line IV-IV in figure 2.

Figure 5 shows a view according to the arrow V in figure 3 - on a larger scale

Figure 6 shows a view along the line VI-VI in Figure 3, while Figure 7 shows a view along the line Vil-VII in Figure 3.

The device shown in the figures relates to a soil cultivation machine, in particular for the preparation of a seed bed.

The machine comprises a tubular frame part 1 extending transversely to the direction of travel A, in which the upwardly directed, preferably vertical, axes 2 of working members 3 are mounted next to each other. The distance between the axes of the shafts 2 is the same and is preferably 25 cm. On the end of each shaft 2 protruding from the bottom of the frame part 1, a carrier 4 extending at least substantially horizontally is provided. The carrier 4 is provided near the ends with downwardly extending movement elements 5 in the form of strip-shaped teeth. For the attachment of the machining elements, each carrier is provided at the ends with a cylindrical part in which a fixing part 6 of the machining element 5 is accommodated. The fastening part 6 of a working element 5 is provided at the top with a screw thread on which a nut 7 is screwed, which co-acts with the top of the cylindrical part of the carrier 4 to fix the working element 5. The fastening part 6 is provided at the bottom of diametrically opposed projections 8, which cooperate with corresponding recesses on the underside of the cylindrical part of the carrier 4. The fixing part 6 of the tooth merges into a substantially flat working part with a downwardly tapering pin-shaped part 9, which is located within the working part and has a length which is approximately one third of the length of the working part. 10 of the working element 5. The working part 10 encloses an angle of ± 172 ° with the longitudinal axis of the fastening part 6. The diametrically opposed projections 8 on the underside of the fastening part 6 merge into the front and rear. rear side of the working part 10, the width 30 of which is significantly greater than the thickness (figure 5). The operative portion 10 tapers to the bottom with the front enclosing a greater angle to the longitudinal axis than the rear. The front side is provided with a chamfered surface practically over the entire length of the working part 10, such that a narrowing towards the front occurs as a result. The operative part 10 is twisted about its longitudinal axis, all this in such a way that, relative to the direction of rotation B (see figure 1) of a working member 3, the front side is located further from the axis of rotation a of the working member 3 than the rear side. The dependence of the direction of rotation therefore requires two types of machining elements, namely machining elements for left-turning and right-turning working members. The twist angle with a tangential plane is preferably ± 30 °. The active part 10 further has a regularly curved course extending from the front to the rear, such that the active part on the side of the rotary axis a of a working member 3 is concave. The radius of the curvature increases towards the bottom of the active part 10, preferably from 10 to 12 cm. Thus, the radius of the curvature along the entire length of the working part is smaller than the radius of the largest circle described by a working element during rotation about the axis of rotation a of a working member, which radius is at least 12.5 cm. amounts. Due to the concave course, the crumbling of the earth is intensified in combination with the above-mentioned twist. The free ends of the active part 10, as shown in Figure 5, are practically horizontal during normal operation. Due to the curvature, the risk of smearing when working on heavy wet soils is small. On hard soils, the thinning front is an ideal means to initiate crumbling by impact. The curvature gives the active part a high resistance to deformation, especially on stony soils. 50 The transition of the fastening part via part 9 provides an ideal connection to the active part, whereby reaction forces can be absorbed very well. Although not shown, the twist of the active member may also be such that it gradually increases from above.

The processing element is preferably obtained by forging from material which has been hardened in subsequent zones with a special phase hardening. The hardness decreases from bottom to top. The 55 ends of the tubular frame portion 1 are closed by upwardly extending plates 11 extending in the direction of travel A. Near the front, each of the plates 11 is provided with a pin 12 for a pivotable arm 13 extending backwards along the plate, which by means of a

Claims (4)

1. Soil cultivation machine for the preparation of a seedbed, provided with a frame containing a number of working members which can be driven by motor rotatable about at least almost vertical axes of rotation, each of which is provided with two separate, disposed downwardly spaced from the axis of rotation. rigid machining elements, which have a strip-shaped active part, in which, calculated in the direction of rotation of the machining members, the front of the active part increases in thickness towards the rear and the active part running substantially tangentially with respect to the axis of rotation 45 longitudinal axis is twisted, that the front of the active part is located at a greater distance from the axis of rotation than the rear thereof, characterized in that each strip-shaped active part (10) of these machining elements (5) is on the axis of rotation ( a) side of the associated processor (3), m The maintenance of the straight longitudinal centerline, from its free end over at least most of its length, has a concave curved direction directed towards this axis of rotation 50 (a), the side of said active part (10) facing away from the axis of rotation (a) runs concentrically from its free end over the same part of the length with respect to the concave course of the side facing the axis of rotation (a).
Soil cultivation machine according to claim 1, characterized in that the radius of curvature of the concave curved side of the active part (10) is smaller than the radius of the largest circle, which is described by 55 a working element (5) during a rotation of a processor (3).
Soil cultivation machine according to claim 1 or 2, characterized in that the radius of curvature of the concave curved side of the working part (10) increases towards the free end of the working 192769 4 part (10).
3 192769 adjuster 13A is multi-tunable and lockable. Between the free ends of the arms 13 a freely rotatable roller 14 is arranged, the longitudinal axis of which extends at least substantially parallel to a plane through the axes of rotation a of the working members 3 and which roller is provided on the periphery in the direction of the longitudinal axis. extending rod-shaped parts (not shown in more detail). At the ends of the frame part 1 there are further provided during operation a substantially vertical position of plates 15, which are pivotable about an axis extending in the direction of advancement A and which can each cooperate with an outer processing member 3 to obtain regular crumbling and division of the earth. Within the tubular frame part 1, on each of the shafts 2 of a working member 3, a gear wheel 16 with straight teeth is arranged, one and the other such that the gears on adjacent shafts are in driving connection with each other. Near the center, the shaft 2 of a working member 3 is extended upwards and extends into a gearbox 17 in which this extension is in driving connection via a bevel gear transmission and a speed variator 18 located at the rear of the gearbox with a direction of travel A extending shaft 19, which protrudes beyond the gearbox at the front. The front of the frame part 1 is further provided with a trestle 20, by means of which the machine can be coupled to the three-point lifting device of the tractor. The operation of the machine described above is as follows: During operation, the machine is coupled by means of the trestle 20 to the three-point linkage of a tractor and can drive from the PTO shaft via an intermediate shaft 21 and the transmission 20 described above. the working members 3 are brought into a rotating movement, all this in such a way that adjacent working members rotate in the opposite direction (figure 1). The working elements 5 of the respective working members 3 herein process at least adjacent strips of soil. During operation, each of the working elements moves with its active part through the ground via a cycloid path. The course of the web depends on the speed of travel and the speed of rotation of the working members. Due to the curvature described above, the front as well as the back of the active part 10 is generally located within the path described by the center of the active part. In this way it is achieved that, despite the strip-shaped design of the active part, the desired crumbling of the nature to be produced by impact action can be obtained without any adverse smearing occurring. Because the active part is provided with the curvature, which gives this active part a concave shape on the inside, as already mentioned, the active part has a greater resistance to forces acting on the tooth during operation, while moreover a regular along the active Partial flows of the earth can take place both on the inside and outside, resulting in better crumbling. 35
Soil cultivation machine according to claim 3, characterized in that the radius of curvature of the concave curved side increases from 10 to 12 cm. Hereby 2 sheets drawing
NL8400104A 1984-01-12 1984-01-12 Soil cultivation machine. NL192769C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL8400104A NL192769C (en) 1984-01-12 1984-01-12 Soil cultivation machine.
NL8400104 1984-01-12

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
NL8400104A NL192769C (en) 1984-01-12 1984-01-12 Soil cultivation machine.
GB08431900A GB2152343B (en) 1984-01-12 1984-12-18 Soil cultivating implements
DE19853500273 DE3500273C2 (en) 1984-01-12 1985-01-05 Soil cultivation machine, in particular rotary harrow
IT1906685A IT1183103B (en) 1984-01-12 1985-01-10 Tool the cultivation of the soil with ribbon processing organs, twisted around their longitudinal axis
FR8500357A FR2558028B1 (en) 1984-01-12 1985-01-11 ROTARY GROUND TYPE TILLING MACHINE

Publications (3)

Publication Number Publication Date
NL8400104A NL8400104A (en) 1985-08-01
NL192769B NL192769B (en) 1997-10-01
NL192769C true NL192769C (en) 1998-02-03

Family

ID=19843316

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8400104A NL192769C (en) 1984-01-12 1984-01-12 Soil cultivation machine.

Country Status (5)

Country Link
DE (1) DE3500273C2 (en)
FR (1) FR2558028B1 (en)
GB (1) GB2152343B (en)
IT (1) IT1183103B (en)
NL (1) NL192769C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29709134U1 (en) 1997-05-24 1997-08-28 Niemeyer Gmbh & Co Kg Soehne Rotary harrow
IT201800004472A1 (en) * 2018-04-13 2019-10-13 Device for the automatic adjustment of the working position of the tools applied to a rotary harrow perfected
RU194578U1 (en) * 2019-09-26 2019-12-16 Федеральное государственное бюджетное образовательное учреждение высшего образования "Брянский государственный аграрный университет" Vertical turning rotor rotor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1389483A (en) * 1920-02-02 1921-08-30 Rennie E Billingsley Rotary plowshare
GB989461A (en) * 1960-05-05 1965-04-22 Evers & Wall Ltd Improvements in or relating to rotary blade assemblies for cultivators
NL7116820A (en) * 1971-12-08 1973-06-13
FR2183571B1 (en) * 1972-05-10 1974-08-30 Santerre Atel Const Meta
NL170361B (en) * 1973-03-19 1982-06-01 Lely Nv C Van Der Teeth for a tilling machine machine.
NL7409706A (en) * 1974-07-18 1976-01-20 Lely Nv C Van Der A soil cultivating machine.
IT1060339B (en) * 1976-03-29 1982-07-10 Maschio Snc F Lli Vertical multi-axis milling machine with the tool disposed with the cut in the direction Nontangential
NL7810716A (en) * 1978-10-27 1980-04-29 Patent Concern Nv Soil tiller.

Also Published As

Publication number Publication date
GB2152343A (en) 1985-08-07
NL192769B (en) 1997-10-01
FR2558028B1 (en) 1990-02-16
GB8431900D0 (en) 1985-01-30
IT8519066D0 (en) 1985-01-10
IT1183103B (en) 1987-10-05
DE3500273A1 (en) 1985-07-18
FR2558028A1 (en) 1985-07-19
DE3500273C2 (en) 1994-08-25
GB2152343B (en) 1986-10-22
NL8400104A (en) 1985-08-01

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Effective date: 20030801