GB1592398A

GB1592398A - Support wheel assembly for a reversible plough

Info

Publication number: GB1592398A
Application number: GB4979077A
Authority: GB
Original assignee: Rabewerk Heinrich Clausing
Current assignee: Rabewerk Heinrich Clausing
Priority date: 1976-12-01
Filing date: 1977-11-30
Publication date: 1981-07-08
Also published as: BE861358A; AT353521B; IT1087908B; DE2654370A1; CH624543A5; ATA793577A; DE2654370C2

Abstract

When the plough frame is being lifted as a result of the effect of gravity, the oscillating support wheel assumes one vertical position and then, when the plough frame is turning, pivots first forwards and then into the opposite vertical position. A pivoting device (20-23) ensures that the support wheel (8), after being placed on the ground, assumes its working position against a stop (9 or 10). For this purpose, the axle (14) of the support wheel (8) is arranged pivotably on an axle (15) mounted in a support-wheel carrier (7), so that the support wheel (8), when placed on the ground, comes out of a blocked position into a position in which the support wheel (8) can rotate freely. The blocking of the support wheel (8) is ensured in that the support wheel (8), when lifted off the ground, pivots about the axle (15) in the support-wheel (7), so that a collar (17) arranged on the wheel hub (18) of the support wheel (8) can come with a face (26) up against a stop (16) of the support-wheel carrier (7) as a blocking means. <IMAGE>

Description

(54) A SUPPORT WHEEL ASSEMBLY FOR A REVERSIBLE PLOUGH (71) We, RABEWERK HEINRICH CLAUSING, a German company (Offene Handelsgesellschaft) of 4515 Bad Essen 8, Linne, Federal Republic of Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- The invention relates to a support wheel assembly, for a reversible plough.

Semi-hitehed reversible ploughs wherein a pivotally attached support wheel swings in front of the pivot axis of its carrier when the plough frame with the plough shares are turned over have, compared with those whose support wheel swings behind the pivot axis, the advantage that swinging of the support wheel occurs aImost without jolts and in synchronism with the rotational movement.

In the respective end position, i.e. in the working position, the support wheel carrier comes to rest against a stop which determines the working depth of the plough. Additional holding devices, such as would be necessary if the support wheel were to swing behind the pivot axis, are not required. However, a disadvantage af forward swinging of the support wheel when the plough frame is turned over is that, particularly when driving uphill or over uneven country, the support wheel swings to and fro and may move forwards when the plough frame is lowered. The result is that the wheel shifts forwards in an undesirable manner and therefore does not support the plough.

In order to avoid this disadvantage fit is already known practice to provide on the support wheel carrier a prong which penetrates into the earth when the wheel is set down and therefore should prevent forward movement of the support wheel. It is also known practice to arrange the pivot axis of the support wheel not perpendicular to the driving direction but at an angle which is greater than 90". When the support wheel is set down on the ground, it is at an angle to the driving direction of the tractor so that at first during forward movement a lateral force is exterted upon the wheel. The components acting in a backward direction have the effect that the wheel lags behind the plough frame and is swung backwards. In the working position the support wheel should extend in a driving direction. It follows from this that the angle between the driving direction and the support wheel carrier axis cannot be much greater than 900. The achieved result is slight and is generally insufficient. Both known devices, considered individually, are inadequate to produce the desired effect. Even a combination of both devices is unsatisfactory since the prong may cause an obstruction to the supportweel.

An aim of the invention is to construct a support wheel in which undesirable forward swinging of the support wheel when the plough frame is lowered is safely avoided and the support wheel is inexpensive to manufacture.

According to the present invention there is provided a support wheel assembly for a semi-hitched reversible plough, the assembly comprising a wheel carrier adapted to be swingingly mounted on the fear of the plough frame so as to swing forwardly of its pivot axis as the plough frame is turned over, a support wheel axle movably attached to said carrier and a support wheel journalled on the support wheel axle, the latter being movable when the plough is at least partially raised from the ground to a position in which a collar on the wheel engages a wheel stop on the carrier to prevent rotation of the wheel.

The collar advantageously has a polygonal, preferably square periphery which co-operates with the wheel stop on the support wheel carrier in the withdrawn or semi-withdrawn position of the plough. As long as the collar rests against the wheel stop on the support wheel carrier, the wheel is prevented from rotation. The periphery of the wheel collar may also be provided with toothing, as may the wheel stop.

When the plough is lifted, the wheel collar is therefore applied against the stop on thet support wheel carrier so that rotatability of the support wheel is discontinued. When the plough is lowered at the start of a field, the plough shares are firstly set down. When the plough shares penetrate the ground, then the support wheel also abuts against the ground.

However, at first the wheel cannot yet rotate since the collar rests against the wheel stop of the pendulum support wheel carrier. The wheel therefore lags behind the plough. Only after moving forward and further penetration of the plough shares into the ground does the wheel collar lift gradually off the wheel stop so that the wheel can finally rotate. The effect of blocking the support wheel during lowering of the plough is that the wheel lags behind relative to the plough and it is swung back into its working position during forward movement. The assembly according to the invention is notable for its particularly simplicity and high reliability.

The invention will hereinafter be further described by way of example with reference to the accompanying drawings in which: Fig. 1 is a side elevation of semi-hitched plough having a support wheel assembly according to the invention; Fig. 2 an end elevation partially in section, of the support wheel assembly according to the invention of Fig. 1, and Fig. 3 a side elevation of the support wheel carrier also shown in Figs. 1 and 2.

In Fig. 1, semi-hitched reversible plough 1 is attached to a tractor 2 by way of a coupling 3. The coupling is articulated on the lower links 4 and the upper link 5 of the tractor.

The plough has a rear support wheel assembly 6 having a support wheel carrier 7 and a wheel 8. Stops 9 and 10 against a respective one of which the support wheel carrier rests in each working position are mounted on a plate 11 which is firmly connected to the plough frame 21. The working depth of the plough is adjusted by means of a spindle 12 which is actuable by means of a crank handle 13.

When the plough frame 21 is lifted, the support wheel swings out of its working position forwards into the indicated vertical position. The wheel 8 has a tendency to assume its lowermost position when the plough is raised and, when the plough frame is turned over, swings in a forward direction about a horizontal axle 20a (Fig. 2) and moves after swinging over is complete into the opposite vertical position. After the plough frame with the support wheel 8 thereon has been lowered, the support wheel carrier 7 should be applied during forward movement again against one of the stops 9, 10. To make absolutely sure of this, the axle 14 of the support wheel 8 is hinged to the support wheel carrier 7 by means of a pivot pin 15 which extends perpendicular to the longitudinal axis of the support wheel carrier 7. Mounted below the axle 15 on the support wheel carrier 7 is a wheel stop 16 against which a collar 17 rests in the lifted positon of the plough, said collar being firmly connected to the hub 18 of the support wheel 8. This collar 17 therefore normally rotates together with the support wheel 8. A guide 19 is also fixed on the support wheel carrier 7, said guide embracing the axle 14 of the support wheel 8 and forming an axle stop 20 for the axle 14 so that the wheel in the ploughing position assumes the position outlined by dashed lines in Fig.

2.

The support wheel carrier 7 is hinged by means of a horizontal axle 20a, which lies perpendicular to the driving direction, on the plough frame 21. Firmly connected to the axle 20a is a guide 22 for the support wheel carrier 7. The support wheel carrier is displaceable in this guide by means of the spindle 12. This threaded spindle is rotatable in'a threaded bore 23 of the guide 22 and has at its upper end a locking-in device 24 for an arm 25 fixed on the support wheel carrier 7.

When the plough frame 21 is raised, the collar 17 lies with its stop faces 26 against the stop 16 so that the support wheel 8 cannot rotate. The stop faces 26 are so dimensioned that locking of the support wheel 8 is not terminated until, after re-insertion of the plough shares in the ground, it is ensured that the support wheel 8 has lagged far enough behind the plough for the carrier 7 to be applied to one of the stops 9, 10.

WHAT WE CLAIM IS:- 1. A support wheel assembly for a semihitched reversible plough, the assembly comprising a wheel carrier adapted to be swingably mounted on the rear of the plough frame so as to swing forwardly of its pivot axis as the plough frame is turned over, a support wheel axle movably attached to said carrier and a support wheel journalled on the support wheel axle, the latter being movable when the plough is at least partially raised from the ground to a position in which a collar on the wheel engages a wheel stop on the carrier to prevent rotation of the wheel.

2. A support wheel assembly as claimed in claim 1, in which the support wheel axle is hinged to the support wheel carrier so as to move between an upper position in which it rests against an axle stop and the support wheel is freely rotatable when the plough is lowered and a lower position in which the wheel collar rests against the wheel stop when the plough is at least partially raised.

3. A support wheel assembly as claimed in claim 1 or 2, in which the wheel collar is on a hub of the wheel.

4. A support wheel assembly asclaimed in claim 1, 2 or 3, in which the periphery of the wheel collar is of polygonal configuration.

5. A support wheel assembly as claimed in claim 1, 2 or 3, in which the wheel collar has a toothed periphery.

6. A support wheel assembly for a semihitched reversible plough, constructed sub

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

Claims

**WARNING** start of CLMS field may overlap end of DESC **. plough shares penetrate the ground, then the support wheel also abuts against the ground. However, at first the wheel cannot yet rotate since the collar rests against the wheel stop of the pendulum support wheel carrier. The wheel therefore lags behind the plough. Only after moving forward and further penetration of the plough shares into the ground does the wheel collar lift gradually off the wheel stop so that the wheel can finally rotate. The effect of blocking the support wheel during lowering of the plough is that the wheel lags behind relative to the plough and it is swung back into its working position during forward movement. The assembly according to the invention is notable for its particularly simplicity and high reliability. The invention will hereinafter be further described by way of example with reference to the accompanying drawings in which: Fig. 1 is a side elevation of semi-hitched plough having a support wheel assembly according to the invention; Fig. 2 an end elevation partially in section, of the support wheel assembly according to the invention of Fig. 1, and Fig. 3 a side elevation of the support wheel carrier also shown in Figs. 1 and 2. In Fig. 1, semi-hitched reversible plough 1 is attached to a tractor 2 by way of a coupling 3. The coupling is articulated on the lower links 4 and the upper link 5 of the tractor. The plough has a rear support wheel assembly 6 having a support wheel carrier 7 and a wheel 8. Stops 9 and 10 against a respective one of which the support wheel carrier rests in each working position are mounted on a plate 11 which is firmly connected to the plough frame 21. The working depth of the plough is adjusted by means of a spindle 12 which is actuable by means of a crank handle 13. When the plough frame 21 is lifted, the support wheel swings out of its working position forwards into the indicated vertical position. The wheel 8 has a tendency to assume its lowermost position when the plough is raised and, when the plough frame is turned over, swings in a forward direction about a horizontal axle 20a (Fig. 2) and moves after swinging over is complete into the opposite vertical position. After the plough frame with the support wheel 8 thereon has been lowered, the support wheel carrier 7 should be applied during forward movement again against one of the stops 9, 10. To make absolutely sure of this, the axle 14 of the support wheel 8 is hinged to the support wheel carrier 7 by means of a pivot pin 15 which extends perpendicular to the longitudinal axis of the support wheel carrier 7. Mounted below the axle 15 on the support wheel carrier 7 is a wheel stop 16 against which a collar 17 rests in the lifted positon of the plough, said collar being firmly connected to the hub 18 of the support wheel 8. This collar 17 therefore normally rotates together with the support wheel 8. A guide 19 is also fixed on the support wheel carrier 7, said guide embracing the axle 14 of the support wheel 8 and forming an axle stop 20 for the axle 14 so that the wheel in the ploughing position assumes the position outlined by dashed lines in Fig. 2. The support wheel carrier 7 is hinged by means of a horizontal axle 20a, which lies perpendicular to the driving direction, on the plough frame 21. Firmly connected to the axle 20a is a guide 22 for the support wheel carrier 7. The support wheel carrier is displaceable in this guide by means of the spindle 12. This threaded spindle is rotatable in'a threaded bore 23 of the guide 22 and has at its upper end a locking-in device 24 for an arm 25 fixed on the support wheel carrier 7. When the plough frame 21 is raised, the collar 17 lies with its stop faces 26 against the stop 16 so that the support wheel 8 cannot rotate. The stop faces 26 are so dimensioned that locking of the support wheel 8 is not terminated until, after re-insertion of the plough shares in the ground, it is ensured that the support wheel 8 has lagged far enough behind the plough for the carrier 7 to be applied to one of the stops 9, 10. WHAT WE CLAIM IS:-

1. A support wheel assembly for a semihitched reversible plough, the assembly comprising a wheel carrier adapted to be swingably mounted on the rear of the plough frame so as to swing forwardly of its pivot axis as the plough frame is turned over, a support wheel axle movably attached to said carrier and a support wheel journalled on the support wheel axle, the latter being movable when the plough is at least partially raised from the ground to a position in which a collar on the wheel engages a wheel stop on the carrier to prevent rotation of the wheel.

stantially as herein described with reference to and as illustrated in the accompanying drawings.

7. A semi-hitched reversible plough having a support wheel assembly as claimed in any preceding claim, in which the support wheel carrier is pivoted to the rear of the plough frame so as to swing from one rearwardly downward position against a first stop on the plough frame to another rearwardly downward position against a second stop on the plough frame when the plough is raised, turned over and lowered.