GB2035023A - Reversible plough - Google Patents

Abstract

A reversible plough has a plough head carrying harnessing means 4, 6 and a rear carriage carrying the movable parts, the plough head carrying a fixed ring (13) inside which pivots a movable ring (14) fixedly connected to the rear carriage. Turning of the plough is effected by a jack (11) carried by the plough head at the front part thereof and connected to the movable ring 14. The two rings 13, 14 are mounted to be non-translatable with respect to one another by an assembly of balls or by rollers crossing each other in alternating directions. <IMAGE>

Description

SPECIFICATION Improvements in reversible ploughs The present invention relates to an improved reversible plough in which the length of the plough can be reduced partly by bringing the harnessing means closer to the leading end of the plough and partly by enabling the turning mechanisms to be placed in front of the harnessing means.

According to the present invention there is provided a reversible plough comprising a plough head carrying harnessing means and a rear carriage carrying the movable parts, wherein the plough head carries a fixed ring inside which pivots a movable ring fixedly connected to the rear carriage.

In the accompanying drawings: Figure 1 its a schematic elevational side view, partly in section, of a reversible plough of known type; Figure 2 is a schematic view in side elevation and section of an embodiment of a plough according to the invention; Figure 3 is a schematic front view of the apparatus of Fig. 2; Figure 4 is a detailed view on an enlarged scale illustrating one way of connecting the fixed and movable rings; Figure 5 is a detailed view on an enlarged scale illustrating another way of connecting the fixed and movable rings; Fig. 6 is a partial view in perspective of what is shown in Fig.5.

Fig. 1 shows a reversible plough of known type comprise a plough head comprising a housing 1 inside which an inner shaft 2 is rotatably mounted and to which are attached an upper bracket 3 and two lower arms each having a pivot pin 5 at its end. The lower connecting arms of the harness 4 (indicated schematically) of a tractor (not shown) are attached to the pivot pins 5 while the upper connecting rod 6 (also indicated schematically) is attached to a pivot pin 7 situated at the top of the bracket 3. The rearcarriage consists of a rotating part 8 supporting right and left ploughing implements 9 and 10. Turning of the plough is effected by any suitable mechanism of known type, for example a jack 11. In this type of plough, the system controlling the depth or width are generally arranged on the rotating part 8.

Fig. 2 shows a plough according to the present invention. Parts identical to those described in Fig. 1 carry the same reference numerals. It will be seen that the plough head comprises a harness support 1 2 on the lower lateral ends of which are provided two pivot pins 5 for receiving the lower connecting rods of the harness 4. At the top of the support 1 2 is a cover provided with the pivot pin 7 for the upper connecting rod of the harness 6.

Mounted at the centre of the support 1 2 is a fixed ring 1 3 attached by bolts 1 8. A movable ring 1 4 is pivotally mounted inside this fixed ring 1 3 and connected by bolts 1 6 to the rotating part 1 5 which carries the ploughing implements 9 and 1 0.

The connection between the two rings 1 3 and 14 may be established by any known means, such as balls 1 9 as shown in Fig. 4 or rollers crossing in alternate directions as shown in Figs. 5 and 6.

The rings 1 3 and 14 absorb the pull exerted in ploughing and the couple produced by the weight of the plough when it is lifted.

This arrangement enables the distance "b" between the leading end of the plough and the plough head to be considerably reduced and enables the turning means and regulating means to be placed in front of the support 1 2 without interfering with the harnessing means, so that the length of the plough is even further reduced.

1. A reversible plough comprising a plough head carrying harnessing means and a rear carriage carrying the movable parts, wherein the plough head carries a fixed ring inside which pivots a movable ring fixedly connected to the rear carriage.

2. A plough according to claim 1, in which the turning means are carried by the plough head at the front part thereof, and are connected to the movable ring.

3. A plough according to claim 1 or 2, in which the two rings are mounted to be nontranslatable with respect to one another by an assembly of balls.

4. A plough according to claim 1 or 2, in which the two rings are mounted to be nontranslatable with respect to one another by rollers crossing each other in alternating directions.

5. A reversible plough substantially as herein described with reference to Figs. 2 and 3, with or without the features of Fig. 4 or the features of Figs. 5 and 6.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in reversible ploughs The present invention relates to an improved reversible plough in which the length of the plough can be reduced partly by bringing the harnessing means closer to the leading end of the plough and partly by enabling the turning mechanisms to be placed in front of the harnessing means. According to the present invention there is provided a reversible plough comprising a plough head carrying harnessing means and a rear carriage carrying the movable parts, wherein the plough head carries a fixed ring inside which pivots a movable ring fixedly connected to the rear carriage. In the accompanying drawings: Figure 1 its a schematic elevational side view, partly in section, of a reversible plough of known type; Figure 2 is a schematic view in side elevation and section of an embodiment of a plough according to the invention; Figure 3 is a schematic front view of the apparatus of Fig. 2; Figure 4 is a detailed view on an enlarged scale illustrating one way of connecting the fixed and movable rings; Figure 5 is a detailed view on an enlarged scale illustrating another way of connecting the fixed and movable rings; Fig. 6 is a partial view in perspective of what is shown in Fig.5. Fig. 1 shows a reversible plough of known type comprise a plough head comprising a housing 1 inside which an inner shaft 2 is rotatably mounted and to which are attached an upper bracket 3 and two lower arms each having a pivot pin 5 at its end. The lower connecting arms of the harness 4 (indicated schematically) of a tractor (not shown) are attached to the pivot pins 5 while the upper connecting rod 6 (also indicated schematically) is attached to a pivot pin 7 situated at the top of the bracket 3. The rearcarriage consists of a rotating part 8 supporting right and left ploughing implements 9 and 10. Turning of the plough is effected by any suitable mechanism of known type, for example a jack 11. In this type of plough, the system controlling the depth or width are generally arranged on the rotating part 8. Fig. 2 shows a plough according to the present invention. Parts identical to those described in Fig. 1 carry the same reference numerals. It will be seen that the plough head comprises a harness support 1 2 on the lower lateral ends of which are provided two pivot pins 5 for receiving the lower connecting rods of the harness 4. At the top of the support 1 2 is a cover provided with the pivot pin 7 for the upper connecting rod of the harness 6. Mounted at the centre of the support 1 2 is a fixed ring 1 3 attached by bolts 1 8. A movable ring 1 4 is pivotally mounted inside this fixed ring 1 3 and connected by bolts 1 6 to the rotating part 1 5 which carries the ploughing implements 9 and 1 0. The connection between the two rings 1 3 and 14 may be established by any known means, such as balls 1 9 as shown in Fig. 4 or rollers crossing in alternate directions as shown in Figs. 5 and 6. The rings 1 3 and 14 absorb the pull exerted in ploughing and the couple produced by the weight of the plough when it is lifted. This arrangement enables the distance "b" between the leading end of the plough and the plough head to be considerably reduced and enables the turning means and regulating means to be placed in front of the support 1 2 without interfering with the harnessing means, so that the length of the plough is even further reduced. CLAIMS

1. A reversible plough comprising a plough head carrying harnessing means and a rear carriage carrying the movable parts, wherein the plough head carries a fixed ring inside which pivots a movable ring fixedly connected to the rear carriage.

2. A plough according to claim 1, in which the turning means are carried by the plough head at the front part thereof, and are connected to the movable ring.

3. A plough according to claim 1 or 2, in which the two rings are mounted to be nontranslatable with respect to one another by an assembly of balls.

4. A plough according to claim 1 or 2, in which the two rings are mounted to be nontranslatable with respect to one another by rollers crossing each other in alternating directions.

5. A reversible plough substantially as herein described with reference to Figs. 2 and 3, with or without the features of Fig. 4 or the features of Figs. 5 and

6.