GB2082882A

GB2082882A - Plough having an apparatus for adjusting the cutting width

Info

Publication number: GB2082882A
Application number: GB8126558A
Authority: GB
Original assignee: Rabewerk Heinrich Clausing
Current assignee: Rabewerk Heinrich Clausing
Priority date: 1980-09-03
Filing date: 1981-09-02
Publication date: 1982-03-17
Also published as: GB2082882B; DE8023452U1; FR2489074A1; FR2489074B1

Abstract

A reversible plough has a plough frame 9 carrying plough elements 19. The plough frame 9 is articulated to a stabiliser 4 having a rear wheel 27. The stabiliser is connected to plough couple 1 by a universal joint 7. A turning arm 12 is arranged on a swivel pin B for turning the plough. The plough frame is swivellably connected at 20 to the turning arm 12 by way of a slide block 22 and slide guide 23. Sliding the block 22 relative to guide 23 causes a change in the cutting width. If the angle between the direction of slide and the stabiliser arm 4 is less than 90 DEG the change in cutting width is accompanied by a change in pulling point. The point of articulation between the stabiliser 4 and the plough frame 9 is adjustable to allow for a further adjustment of the pulling point. <IMAGE>

Description

SPECIFICATION Plough having an apparatus for adjusting the cutting width The present invention relates to a plough having apparatus for adjusting the cutting width, More particularly the present invention relates to a reversible or half-turn plough (German: Drehflug) with a plough frame which carries the plough bodies (elements), this frame being articulated, with an arm, to a stabiliser which carries a rear wheel, the stabiliser being connected, by way of a universal joint, to the couple of the reversible plough, with a device for adjusting the cutting width of the first plough body or element, and with a turning device for turning the plough bodies or elements.

For adjusting the cutting width of the first plough body in case of, for example, reversible ploughs, in which the plough frame is supported by means of a pull cable, or in the case of a reversible plough in which the rear end of the plough frame is supported, in articulated manner and by means of an arm, to a stabiliser, the length of the pull cable or the length of the stabiliser is altered for the purpose of increasing the cutting width of the first plough body or element. During ploughing the plough then pivots about the front pulling point, so that the plough is pivoted towards the soil which has already been ploughed, and this is in practice translated into an increase in the cutting width. However, the alteration in the cutting width thus achieved is small relative to the required longitudinal alteration to the pull cable or stabiliser.Furthermore the pulling point is shifted, which, particularly when ploughing down a slope, has a negative effect, as the shift in the pulling point takes place downwardly of the slope.

However, a shift of the pulling point upwardly of the slope would be required for counteracting the component of weight directed downwardly of the slope.

An aim of the present invention is the construction of a reversible plough in which the apparatus for adjusting the cutting width is simple in construction and, hence, is susceptible of relatively inexpensive manufacture; an alteration in the pulling point can accompany the adjustment to the cutting width; and the front pivot mounting and the turning arm are relieved of bending moments.

The present invention provides a half-turn or reversible plough, with a plough frame which carries the plough bodies or elements, the plough frame being articulated, by way of an arm, to a stabiliser which carries a rear wheel, the stabiliser being connected, by way of a universal joint, to the couple of the reversible plough, with a device for adjusting the cutting width of the first plough body or element and with a turning device for turning the plough bodies or elements, characterised in that a turning arm is arranged on a swivel pin in the front part of a frame structure of the plough, an end of this turning arm carrying a guide which extends substantially perpendicularly of the longitudinal axis of the stabiliser; a guide element is slidable in the guide and, for the purpose of adjusting the cutting width of the first plough body or element, the guide and guide element can be displaced relative to each other; the plough frame and turning arm being interconnected by way of a swivel pin which, in the working position extends vertically.

Adjustment of the cutting width is achieved by shifting the plough frame relative to the turning arm. This shift is possible by virtue of the fact that the stabiliser is articulated to the arm, which connects the stabiliser to the plough frame, the stabiliser being articulated at its front end to the front part of the plough frame structure. The guide may, advantageously, consist of a slide guide, and the guide element of a slide block. It will be advantageous if an arm is arranged on the slide block, this arm extending substantially perpendicularly of the slide, and receiving a threaded spindle which can be screwed into a bore which is present in the turning arm and extends parallel to the slide guide. If the slide guide extends exactly perpendicularly of the stabiliser, the adjustment in the cutting width so takes place that no alteration in the pulling point occurs.If, however, the angle between the slide guide and the stabiliser is somewhat smaller than 900, the frame will during the adjustment to the cutting width, pivot somewhat relative to the front part of the frame structure of the plough, so that the pulling point will be shifted, which results in an adjustment to the cutting width in the same direction. This has the result that the cutting width apparatus can be of smaller dimensions than would normally be required for adjusting the cutting width.

In accordance with the further proposal that the arm, which articulates the plough frame to the stabiliser, shall extend parallel to the plough frame and be slidable along the latter, it is further possible to adjust the pulling point and, hence, the relative positioning of the slide guide and the stabiliser.

The invention will be further described by way of example with reference to the accompanying single figure of drawings which shows a plan view of a plough according to the invention.

In the embodiment shown, a stabiliser 4 is attached, with the interposition of a front universal joint 5, to a couple 1, which has journals 2, 3 for attachment of lower linkage arms (not shown) of a tractor. The front universal joint 5 consists of a horizontal swivel pin 6 and of a vertical swivel pin 7. The stabiliser 4 passes below the couple 1.

A swivel pin 8 for use in rotating the plough frame 9 is also attached to the couple 1. The plough frame 9 is, in a known manner, turned by way of a hydraulic cylinder (not shown), one of whose ends is connected to a turret 10 of the couple 1 and the other end of which is connected to a stud 11, which is attached to a turning arm 12 which is fast in rotation with the swivel pin 8.

The rear end of the stabiliser 4 is articulated, by means of a ball joint 13, to an arm 14 which is rigidly attached to the plough frame 9. The arm is screwed, by means of screws 15, to the plough frame 9. The point at which the arm 14 is attached to the plough frame 9 can be varied, that is to say the arm 14 can be moved along to the plough frame 9. This displaceability enables the pulling point to be adjusted.

The rear wheel 27 is arranged at the rear end of the stabiliser 4 and can pivot about a vertical swivel pin 1 6, and thus constitute a trailer wheel.

Swivel pin 16 is fixed to an arm 17 which, in its turn, can pivot about a horizontal swivel pin 1 8 which is mounted in the stabiliser 4. The angular position of the arm 1 7 and stabiliser 4 can be altered by means of a hydraulic cylinder (not shown), so that in this way the working depth of the ploughing bodies or elements 19 can be adjusted and the plough raised.

The front end of the plough frame 9 is, in the working position, articulated, by way of a vertical swivel pin 20, between a pair 21 of plates which, in their turn, are rigidly attached to a slide block 22, which is slidable in a slide guide 23. The slide guide 23 forms an angle of about 900 or somewhat less with the stabiliser 4.

Attached to the pair of plates 21 is an arm 24 in which an end of a threaded spindle 25 is mounted, the other end of this spindle being arranged on the turning arm 12. By means of this threaded spindle 25 the slide block 22 and the slide guide 23 can be shifted relative to each other. When the slide block 22 is slid towards the swivel pin - which results in an increase in the cutting width - the position to which the pulling point has been adjusted remains constant if the angle between the slide guide 23 and the stabiliser 4 is 900. However, if this angle is somewhat smaller than 900 an adjustment in the cutting width is accompanied by an alteration in the setting of the pulling point, which is also experienced as an alteration to the cutting width in the same direction as it is desired to achieve by a direct adjustment to the cutting width setting. This means that the required length of the path of displacement entailed in an adjustment of the cutting width can be kept smaller than would otherwise be required for this same alteration to the cutting width.

Furthermore, as a result of the form of construction illustrated, the turning arm 12 and the swivel mounting are subjected to substantially reduced bending moments, as the front swivel mounting is bridged by the stabiliser and part of the pulling force is taken up by way of the latter.

Claims

1. A reversible or half-turn plough, with a plough frame which carries the plough bodies or elements, the plough frame being articulated, by way of an arm, to a stabiliser which carries a rear wheel, the stabiliser being connected, by way of universal joint, to the couple of the reversible plough, with a device for adjusting the cutting width of the first plough body or element and with a turning device for turning the plough bodies or elements, characterised in that a turning arm is arranged on a swivel pin in the front part of a frame structure of the plough, an end of this turning arm carrying a guide which extends substantially perpendicularly of the longitudinal axis of the stabiliser; a guide element is slidable in the guide and, for the purpose of adjusting the cutting width of the first plough body or element the guide and guide element can be displaced relative to each other; the plough frame and turning arm being interconnected by way of a swivel pin which, in the working position extends vertically.

2. A reversible plough according to claim 1, characterised in that the vertical swivel pin is connected to the guide element.

3. A reversible plough according to claim 1 or claim 2, characterised in that an arm is arranged on the slide block and extends substantially perpendicularly of the slide guide, and receives a threaded spindle whose other arm engages in a screw thread arranged on the turning arm.

4. A reversible plough according to any one of claims 1 to 3, characterised in that the angle between the guide and the longitudinal axis of the stabiliser is somewhat less than 900.

5. A reversible plough according to any one of claims 1 to 4, characterised in that the arm is connected, with the interposition of a ball joint, to the stabiliser.

6. A reversible plough according to any one of claims 1 to 5, characterised in that the arm can be assembled, relative to the longitudinal direction of the plough frame, in different positions.

7. A reversible plough according to any one of claims 1 to 6, characterised in that the arm can be steplessly adjustably slid relative to the longitudinal direction of the plough frame and immobilised in any position thus assumed.

8. A reversible plough comprising a plough frame and a stabilising arm, the stabilising arm being articulated at a rearward position'to a rearward portion of the plough frame, a forward portion of the stabilising arm being connected to a couple of the plough and a forward portion of the plough frame being connected to a turning arm, wherein means connecting the forward portion of the plough frame to the turning arm enable adjustment of the cutting width by movement of the point of connection of the forward portion of the plough frame relative to the turning arm.

9. A reversible plough as claimed in claim 8, - wherein the point of articulation of the rearward portion of the stabilising arm and the rearward portion of the plough frame is moveable along the plough frame and/or the stabilising arm.

10. A reversible plough having means for adjusting the cutting width, wherein said means compensates at least partially for consequent change in the pulling point.

11. A reversible plough substantially as hereinbefore described with reference to the accompanying single figure of drawings.

12. The features hereinbefore disclosed or their equivalents in any novel combination.