DE1171661B - Turning device for mounted reversible plows - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN wjw PATENT OFFICE

EDITORIAL

Boarding school Kl .: AOIb

German class: 45 a-3/42

Number:
File number:
Registration date:
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1171661
R 32704 III / 45 a
May 16, 1962
4th June 1964

The invention relates to turning devices for mounted reversible plows, i. H. for reversible plows that attached to the tractor by a standard three-point linkage and, depending on their training, when changing the working direction must be rotated by 90, 120 or 180 °. It is known for turning the Plows to use hydraulic motors, usually those that consist of cylinders and pistons, namely either single-acting cylinders in which the piston is loaded with a spring, which the Return of the piston after the stroke causes, or double-acting cylinder. The simple ones Cylinders with springs have the advantage that there is only one connecting line between the plow and the tractor is required and, in addition, a special actuating valve can be dispensed with, if you said line between the hydraulically operated excavation cylinder for the three-point linkage and the actuating valve provided for this purpose on the tractor. Your disadvantage is that they cannot serve to fix the plow in its two working positions because after completion one stroke of the piston pushed back by the spring and the previously supplied and Oil that has been depressurized is fed back into the suction tank of the tractor's oil pump. Man therefore needs special notches with locking bolts, which must be actuated before each excavation process. The double-acting cylinders have the advantage that they keep the plow in the two end positions, i. H. in both working positions, determine that the oil will be under pressure until the next turning process in can remain on the cylinder. But for this you require a special reversing valve and two Connection lines between plow and tractor, which is very undesirable.

According to the invention it is proposed that either two single-acting ones for rotating the shaft Cylinders serve, each of which does part of the rotation and the one which completes the rotation is closed by a valve from the pressure line as soon as the pressure in this line drops, or a double-acting cylinder, the two feed lines of which alternate via a check valve are connected to the single supply line, so that in both cases the hydraulic drive means the Hold the turning shaft in its respective end position after each turning process.

Another shortcoming of the known hydraulic turning device is that it kel of the plow and thus the turning shaft a cumbersome mechanical mechanism bedin-turning device for mounted reversible plows

Applicant:

Rabewerk Heinrich Clausing,

Linne via Bohmte (District Osnabrück)

Named as inventor:

Dipl.-Ing. Helmut Menzel, Bad Essen

gen, which converts the reciprocating motion into the required rotary motion. That is at Plowing with an angle of rotation of 180 ° is the case, this angle of rotation depending on the inclination the tractor to the ground, d. H. depending on the so-called tilting of the plow, up to 210 ° can rise. The invention also aims to save the mechanism mentioned and the at Use of a hydraulic drive of the turning device consisting of a piston and cylinder to increase the achievable angle of rotation.

According to a first embodiment of the invention, there is a single-acting hydraulic cylinder used with a piston, and the turning device is characterized according to the invention by an additional hydraulic auxiliary motor consisting of piston and cylinder and by the arrangement of the auxiliary engine and the main engine also consisting of cylinder and piston to each other and to the turning shaft in such a way that upon the initial rotation of the turning shaft by the main motor the auxiliary motor is driven by the turning shaft and then the turning shaft is driven by the auxiliary motor rotated and via this the cylinder of the main engine is swiveled into such a position, that after the piston of the main engine has been returned to its initial position in the cylinder is, the turning shaft of the main motor rotated in the opposite direction during the next work process will.

According to a second embodiment of the invention, there is a double-acting hydraulic cylinder used with a reversing valve attached to the plow front frame, and the turning device is according to the invention designed so that an oil reservoir is attached to said front frame, the on the one hand via a line with the named reversing valve and on the other hand with the pressure oil line connected via a check valve, which is only one

409 598/127

Permits oil flow from the accumulator to the pressure oil line. Both embodiments require only one connecting line between plow and tractor, allow the turning shaft to be fixed in the working position without mechanical detents and result in an increase in the angle of rotation of the turning shaft. Two embodiments of the invention are described below with reference to the drawing, in this show

line 28 is then pressureless, the auxiliary cylinder 19 holds the turning shaft 4 and thus also the plow or the work tools fixed in their position. Try external forces to counteract the turning shaft 5 to rotate clockwise, no movement can take place because the auxiliary cylinder 19 is already in its maximum stroke position, try to turn the turning shaft clockwise, like this the piston 20 would have to retract and that in the auxiliary

Fig. 1 to 5 displace the hydraulically operated turning advance io cylinder 19 contained oil. But that is

Direction according to the invention with a simply not possible, since the flow from the line 34

acting cylinder in several working positions and to the connection line 28 in the valve housing 29 through

A b b. 6 to 8 the hydraulically operated reversing front slide 30 is closed. One in the line

Direction according to the invention with a pressure that builds up double direction34 can push the slide 30

acting hydraulic working cylinder, also 15 do not adjust, since the left and after

in several working positions. Compensate oil pressure forces directed to the right.

As soon as the connection line 28 and through the frame carries the two firmly attached pins 2 for the lower link and a clutch, the piston 12 begins against the train lungsstück 3 with a bore for receiving the 20 of the return spring 13 extend, being in the mounting pin for the upper arm of the three-connecting line 28, the line 32, the control line point suspension. In the frame is the turning 33 and in the main cylinder 11 a relatively shaft 4 of the plow, not shown, rotatably builds up a low specific pressure that depends on the size. On this shaft are two cams 5a and Sb of the tensile force of the return spring 13 is proportional to and a driver 6 fixedly mounted. On the 35 and not sufficient to move the slide 30 against the turning shaft 4 is rotatable a link 7 with two pressures of the spring 31 to the left. Sofest attacks 8 α and 8 b stored. On the Ku- soon the pawl 9 a after the break of the existing lisse are further two pawls 9 α and 9 b rotatable game, the size of which is supported by the respectively set around the pin 10 α and 10 b . Starting position of the turning shaft is dependent on the

The single-acting main rotary cylinder 11 has touched 30 cams Sa and is located in the main cylinder 11 a plunger 12 and works against a further increase in pressure instead of the reversing return spring 13; it is pivoted about a bolt 14 through the auxiliary cylinder 19 and the bar, which sits in a sliding block 15. This sliding block slide 30 is hydraulically locked; who moves on The pressure increase, which occurs in a guide 16 of the plow, acts via the control line gestelies 1 and is by a compression spring 17 against 35 33 on the right end face of the slide 30 and the upper end of the guide 16 is pressed. The now adjusts this against the pressure of the spring Plunger 12 engages on a bolt 18 of 31 to the left until the connection between Setting 7 on. the line 34 and the connecting line 28

The single-acting rotary auxiliary cylinder 19 has is. The piston 12 of the master cylinder 11 moves

a plunger 20, which via a pin 21 40 against the train of the return spring 13 further out and

attacks directly on the turning shaft; he is twisted over a backdrop 7, pawl 9 α and cam

Bolt 22 is connected to a two-armed lever 23 5 a clockwise the turning shaft, with one-

the, whose pivot point 24 in the plow front frame 1 on the one hand the rotational resistance and on the other hand on

is stored. A threaded oil pressure acting on the piston 20 is rotatably seated in the lever.

nut 25, which must 45 together with a threaded spindle 26. The displaced from the auxiliary cylinder 19

working. This is fixed with the plow oil via the line 34, the annular space of the

Front frame 1 connected storage 27 axially supported slide 30, the connecting line 28 and the line

th. By adjusting the threaded spindle 26, the angular position of the turning shaft in the two working positions can be set.

The hydraulic connection line 28 opens into a valve housing 29 in which a slide 30 is longitudinally movable is arranged and is under the action of a compression spring 31. With the spring 31 relaxed,

32 is supplied to the master cylinder 11 in addition to the amount of oil supplied by the tractor.
50 After the turning shaft has passed through a certain partial area of a turning process, the piston 12 in the master cylinder 11 reaches its maximum stroke position and the oil delivery into the master cylinder 11 ceases. This state is in

the left collar of the slide 30 covers the connection 55 A b b. 3 shown. At the same time, the collector 28. The line 32 connects the connection ben 20 of the auxiliary cylinder 19, the top dead center line 28 with the. Interior of the master cylinder
11. A control line 33 connects the line 32

directly to the valve housing 29 and opens opposite

his movement already exceeded, he now takes from the connection line 28 via the annulus of the Slide 30 and line 34 pressure oil on and

Over the end face of the right collar of the slide 60, in turn, the turning bar 30 rotates via the pin 21 needs to be overcome, see the right and left collar of the slide 30
lying annulus.

The operation of the device is as follows: Fig. 1 shows the turning device in the rest position, z. B. during plowing. The connecting

As a result of the further rotation of the turning shaft 65, the pawl 9 a lifts from the cam 5 a, while the driver 6 comes into engagement with the pawl 9 b resting on the stop 8 b due to its own weight and via this the

5 6

Take gate 7 clockwise. Here, a check valve 49 with the connection

the master cylinder 11 as a result of its articulation on line 28, the connection of the line 46 to

the bolt 14 mounted in the sliding block 15 around the line 47 between the oil reservoir 48 and the

required amount down against the pressure of the check valve 49 takes place.
Dodge spring 17. 5 The control slide 42 is secured by a bolt 50

In A b b. 4 the turning device is articulated to a differential lever 51 according to

rotation ended, d. That is, the auxiliary cylinder. One end of the differential lever 51 is through a

19 has reached its maximum stroke position, while pin 52 is articulated with plunger 53

the piston 12 of the master cylinder 11 is connected to its lower single-acting shift cylinder 54, the

Has exceeded dead center. In this position, by means of a bolt 55, it is articulated to the front of the plow.

the turning device waits as long as the carriage 1 and its plunger 53 are connected

Closing line 28 is under pressure. If the on against a return spring 56 works. The interior

Closing line 28 depressurized, then the spring 31 of the switching cylinder 54 pushes through a control line 33

move the slide to the right so that the line 34 is connected to the connecting line 28. The other

the connecting line 28 is disconnected, d. that is, the 15 end of the differential lever 51 is hinged

Auxiliary cylinder is thus hydraulically locked and 57 connected to a coupling rod 58, which its-

holds the turning shaft in place. At the same time, via a joint 59 on one in the front of the plow

the oil contained in the master cylinder 11 is displaceably arranged under the frame 1 switching claw 60

the action of the return spring 13 engages by the train. Two still grip the joint 59

retracting the piston 12 via the line 32 and so push rods 61a and 61b at the free ends

the connecting line 28 returned again, ie 62 a and 62 b in guides 63 a and 63 b of the plow

returned to the tractor's oil tank. The front frame 1 slide and by the action of a

The piston 12 takes the Ku tension spring 64 towards each other via the bolt 18. That

Lisse 7 in a clockwise direction, the pawl gripping the left horseshoe-shaped end of the switching pawl 60

9 b lifts off the driver 6 and on its next 25 with its hook-shaped lugs 65 a and 65 b

gear over the angled back of the cam over the turning shaft 4.

Sb slides while the pawl 9 a rests on the stop 8 α as a result of its The operation of the turning device is fol own weight and gende: A b b. Figure 6 shows the turning device at rest being passed under the cam 5a. position, e.g. during plowing. The connecting

After completion of the return process takes 30 line 28 is depressurized, the rotary cylinder 36 holds the the turning device a position as it is in turning shaft 4 and thus also the work tools Fig. 5 is shown. Fixed in position when the connection is depressurized. External forces try the line 28 pauses the turning device until turning counterclockwise by turning shaft, Supply of pressure oil from the tractor so that no movement can take place because the next one is turning Turning process is initiated; The rotation 35 of the cylinder 36 has already taken place in its maximum stroke position then in the manner described, but with the development (outermost length), try the counter clockwise. To turn the turning shaft clockwise, so would have to

In the turning device according to A b b. 6 to 8 it is retracting the piston 37 with the piston rod 38

a lever arm 35 is firmly attached to the turning shaft 4 and that on the piston side of the rotary cylinder 36

brings. The double-acting rotary cylinder 36, in which 40 displace the oil contained. But that is not possible

If a piston 37 with piston rod 38 moves, there is the flow of oil via line 44, control slide 42

Via a bolt 22 with a two-armed lever and connecting line 28 through the check valve

23 connected, the pivot point 24 of which is locked in the plow front 43. According to the external forces

frame 1 is stored. He takes a threaded nut can be between the piston 37 and the back

25 rotatable open. It works with a threaded spin valve 43 a more or less large special

del 26 together, which build up pressure through a firm with the ploughman. However, this is not in

The bearing 27 connected to the front frame 1 is axially supported, an adjustment of the control slide 42

th will; by adjusting the threaded spindle 26, since it is not on the shift cylinder

the angular position of the turning shaft in the two 54 can act.

Work positions set. 50 As soon as an oil flow from the connecting line 28

The piston rod 38 engages via a pin 21 when the tractor is used, this is via the reverse on lever arm 35. The turning shaft 4 has a check valve 43 to the control slide 42 and further a transverse bore 39 in which two bolts 40 a and via line 44 to the upper side of the piston 40 & are arranged, which are guided by a spring 41 in the rotary cylinder 36. Since a movement of the its outer piston 37 is not possible downward due to stops (not shown), builds up can be held in a bordered position and immediately apply an oil pressure against the pressure, which is now also above the the spring 41 are displaceable inward. Control line 33 acts on the shift cylinder 54,

In the plow front frame 1, a control slide 42 is during an oil flow from the connecting line 28 to the Arranged longitudinally displaceable, which is recorded in its left oil reservoir 48 by the check valve 49 Position the hydraulic connection 60 prevents. The piston 53 of the shift cylinder 54 Line 28 via a check valve 43 with the line now runs against the pressure of the return spring device 44 to the upper side of the piston and the lower piston 56 and adjusts the differential lever 51 in the On the other side of the rotary cylinder 36 via the line 45, it moves around the joint 57 in the clock the line 46 connects; rotates in its right hand position indicator and via the joint 50 the control connects the control slide 42, the lower KoI 65 slide 42 moves to the right. The differential side of the rotary cylinder 36 with the connecting lever 51 reaches the position shown in A b b. 6 dashed line 28 and the upper side of the piston with the line drawn position. The oil flow now flows from the 46. A line 47 connects an oil filler 48 connecting line 28 via the check valve 43,

Control slide 42 and line 45 to the lower piston side of the rotary cylinder 36, while the no work, displaced from the piston side of the rotary cylinder 36 is fed to the oil reservoir 48 via the line 44, control slide 42, the lines 46 and 47. The piston rod 38 moves in and rotates the turning shaft 4 clockwise via the lever arm 35. About halfway through the turning process, the bolt 40 b comes into engagement with the hook-shaped projection 65 b of the switching claw 60, while the bolt 40 α starts with its inclined back against the hook-shaped projection 65 a of the switching claw 60, against the pressure of the spring 41 is shifted inside and thus passes under the hook-shaped projection 65 a. In the further turning process, the bolt 40 b takes the hook-shaped projection 65 b against the action of the spring 64 to the left. As soon as the push rods 61a and 61b their mutually extended position have exceeded, approaches the switching claw 60 under the action of the spring 64 the movement of the bolt 40 b advance, that is, the hook-shaped Ansatz65 b moves to the left out of the range of rotation of the bar 40 b out . The switching claw 60 adjusts the differential lever 51 through its movement via the coupling 58 in such a way that it rotates clockwise about the joint 52 and thereby adjusts the control slide 42 to the left via the joint 50. During this switching process, the lever arm 35 is in its top dead center position.

The state of the turning device during the further turning process is shown in A b b. 7 shown. The pressure oil flow from the connection line 28 to the upper side of the piston and the return oil flow from the lower piston side of the rotary cylinder 36 to the oil reservoir 48 is indicated by arrows. the The extending piston rod 38 causes the further rotation of the axis 4 via the lever arm 35 clockwise. The turning process is complete as soon as the turning cylinder 36 is at its maximum Lift position reached. At the same time the check valve 43 closes, whereby the turning shaft 4 hydraulically is locked. As soon as the connection line 28 is depressurized, the oil reservoir 48 begins to overflow to drain line 47, check valve 49 and connecting line 28; at the same time the piston moves 53 of the shift cylinder 54 under the action of the return spring 56 and displaces the in the shift cylinder 54 via the control line 33 and connection line 28. This is in A b b. 8 shown. The oil flow is indicated by arrows. The piston 53 adjusts when retracting the differential lever 51 in such a way that it rotates about the joint 50 to the left and The switching claw 60 pushes to the right via the coupling 58. Once these movements are completed are, the turning device remains in its position until the supply of pressurized oil the next turning process is initiated. The rotation then takes place in the manner described, but in opposite direction.

Claims (15)

Patent claims: 1. Hydraulically operated turning device for mounted reversible plows, their hydraulic drive means are connected to the tractor's hydraulic system by only one line, characterized in that either two single-acting ones for rotating the shaft (4) Cylinders (11, 12, 19, 20) are used, each of which causes part of the rotation and the cylinder (19, 20) completing the rotation through a valve (29, 30) from the pressure line (28) is completed as soon as the pressure in this line drops, or a double-acting Cylinder (36, 37), the two feed lines (44, 45) of which alternate via a check valve (43) are connected to the single supply line (28), so that in both cases the hydraulic Drive means (11, 12, 19, 20, 36, 37) the turning shaft (4) after each turning process in their hold the respective end position. 2. Turning device according to claim 1, characterized in that the end positions of the Reversing shaft (4) by mechanical adjustment of the housing (19, 36) of the hydraulic drive means are adjustable. 3. Turning device using a single-acting and made up of piston and cylinder existing hydraulic motor according to claim 1, characterized by an additional hydraulic auxiliary motor consisting of piston (20) and cylinder (19) and by the arrangement the auxiliary engine and the main engine, which also consists of cylinder and piston (11, 12) to each other and to the turning shaft (4), in such a way that during the initial rotation of the turning shaft the auxiliary motor (19, 20) is driven by the turning shaft by the main motor and then the turning shaft is rotated by the auxiliary motor and via this the cylinder of the main motor is pivoted to such a position that after the piston of the main engine is returned to its initial position in the cylinder has been, in the next operation the turning shaft from the main engine in the opposite Sense is rotated. 4. Turning device according to claim 3, characterized in that the additional Rotation of the turning shaft (4) causing auxiliary motor (19, 20) a direction of rotation of the turning shaft (4) hydraulically and mechanically locks the other direction of rotation of the turning shaft. 5. Turning device according to claims 2 and 3, characterized in that the pendulum on the plow front frame (1) articulated auxiliary motor (19, 20) with the turning shaft and also on the plow front frame pendulum articulated main motor (11, 12) with a rotatable on the Turning shaft mounted gate (7) are coupled, pawls (9) for the drive on this gate hinged to the turning shaft and on the turning shaft (4) drivers (5, 6) are attached, each in connection with one of the pawls (9) the rotary movement of the link on the turning shaft transfer. 6. Turning device according to claim 5, characterized in that on the link (7) Stops (8) are attached to limit the oscillating movement of the pawls (9). 7. Turning device according to claim 5, characterized in that the driver (5) are simultaneously designed as cams and in one direction of rotation of the turning shaft (4) for control the pawls (9) are used. 8. Turning device according to claim 2, characterized in that the auxiliary motor (19, 20) articulated with one arm of a double-armed lever (23) articulated on the plow front frame is coupled, the other arm of which is adjustable by a threaded spindle (26). 9. Turning device according to claim 3, characterized in that the cylinder (11) of the Main engine with the pressure oil line (28) directly and the cylinder (19) of the auxiliary engine with this is connected via an automatic slide valve (29), which in the end positions the line (34) to the cylinder (19) and only releases it when the pressure in the master cylinder has a exceeds a certain value. 10. Turning device according to claim 3, characterized in that the cylinder (11) the main motor bearing pivot pin (14) in the plow front frame (1) resiliently mounted is. 11. Turning device according to claim 1 using a motor in the form of a double-acting Cylinder and piston, the piston rod of which is coupled to the turning shaft and which itself is attached to the front frame of the plow Switching valve is controlled, characterized in that on said front frame (1) an oil reservoir (48) is attached, which is once connected to said reversing valve via a line (46) and on the other hand connected to the pressure oil line (28) via a check valve (49) is that only allows an oil flow from the reservoir to the pressure oil line. 12. Turning device according to claim 11, characterized in that for switching the Switching valve (42) alternating with one or the other end of the cylinder space the pressure oil line (28) or with the oil reservoir (48) connects a cylinder (54) with a spring-loaded single-acting piston (53, 56) is used, which is connected through a line (33) to the pressure oil line (28) is connected. 13. Turning device according to claim 11, characterized by a means on the turning shaft (4) attached cam (40) actuated mechanical switching device (60) for the Reversing valve (42) that takes effect as soon as the piston of the hydraulic motor is on has completed the first stroke and causes a second stroke of the piston, in which by the piston rod (38) continued to turn the turning shaft in the same direction to its other end position will. 14. Turning device according to claim 11, characterized in that the hydraulic drive device (53, 54) and the mechanical switching device operated by the turning shaft (4) (60) attack the ends of a double-armed lever (51) between them is articulated on the movable part of the switching valve (42). 15. Turning device according to claim 14, characterized in that the mechanical Switching device (60) is assigned a spring-loaded switching mechanism (61, 64) which when a limit position is exceeded, the switching device (60) is ahead of the one driving it Causes cam (40). Considered publications:
French patent specification No. 1164 355. 1 sheet of drawings 409 598/127 5.64 © Bundesdruckerei Berlin