DE7305774U - ATTACHED ROTATING PLOW WITH HYDRAULIC TURNING DEVICE - Google Patents

Description

JZoefL
SZcefU Company, D-8000 Munich 5, March 31, 197T-2,
II / wu.
D-3471 I.
ί ^ i ₉ L-on ₉ . CaU O,
G 73 05 774.6 International harvester Chicago

Mounted reversible plow with hydraulic turning device

The innovation relates to a mounted reversible plow with a hydraulic turning device with a crank arm attached to the rotating frame carrying the plow tree for the articulated connection of a centered on the plow front frame towering coupling part supporting double-acting hydraulic cylinder, whose, a pivot point on a between the linkage parts mounted lever acting as a crank arm connected and the lever between two stops is limited pivotable «whereby alternately against the The stop lying in the turning direction the lever at the beginning of the turning movement Tm comes to rest in the unpressurized state of the hydraulic cylinder and is held on it during the retraction of the piston rod.

Such a turning device is from GB-PS 1 o51 1o1 known. With the mounted reversible plow known from this the center of gravity is raised in the first half of the rotation and lowered in the second half of the rotation, so the center of gravity finds its way under all conditions Completion of the first half of the rotation before a lever arm, so that The center of gravity not only prevents the plow from swinging back, but also rotates it further in the correct direction. As a result, the turning device of this well-known reversible plow, the extension of the hydraulic

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Lischen cylinder corresponding movement by the weight of the plow: nes supported while the lever still remains on one of the two stops limiting its pivoting movement. Only with continued When the piston rod of the hydraulic cylinder is extended, the lever is released from this stop.

The situation is different with reversible plows, where the center of gravity is not raised and in the first half of the rotation is lowered in the second half of the rotation, in which the center of gravity is, for example, in the axial extension the turning shaft lies. It can be used here in particular on terrain that is inclined to the side in relation to the direction of travel, or in heavy soil, which tends to form clods of earth on the plow bodies, the piston rod may no effective lever arm for further turning of the rotatable part when extending from the hydraulic cylinder of the plow.

It has also already been proposed for a reversible plow to provide control means according to DT-OS 1 757 o94, the one to bring about an over-center position in the lowest Center of gravity of the plow frame advance the articulation point of the hydraulic cylinder relative to the plow frame permit. Here, however, the piston rod of the hydraulic cylinder does not engage on a pivotable one between stops Lever, but on a ring that is concentric to the turning shaft relative to the plow head piece and to the Plow frame is rotatably mounted.

The task of the innovation is to provide a hydraulic turning device on a plow whose center of gravity is not in the first half of rotation raised and in the second half of rotation

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is lowered, thereby improving that with certainty under all operating conditions, including when working on sloping terrain and heavy clumping of earth on the plow bodies inclined soil when turning the plow on the parts of the plow to be turned positive torque is exerted.

This object is achieved according to the innovation in that an acting on the lever or on the hydraulic cylinder, the lever is provided against the stop lying in the turning direction urging spring, against its spring force immediately with the extension of the piston rod at the beginning of the second half of rotation, the lever comes free from the stop and shifts in the direction of the line of action of the hydraulic cylinder.

As a result, at the beginning of the turning movement, the lever rests against the stop located in the turning direction, is already at the beginning of the turning process, the prerequisites have been created that at the end of the first turning point dpi retracted piston = rod on the crank arm of the rotating device, the hydraulic cylinder can be effective in an over-dead-center position, without the risk of falling back. The feather is arranged in such a way that during the first half of rotation, that is, when the piston rod is retracted, the Swivel movement of the lever is supported only in the turning direction.

In an advantageous embodiment of the innovation, the lever can be mounted on the coupling part and with the piston of the hydraulic Cylinder be articulated, or it can be mounted on the crank arm and with the piston rod of the hydraulic cylinder be articulated. In the first case the spring can be designed as a tension spring and in the second case as a compression spring.

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Ill envelope 1 * 7 * 1

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The innovation is shown in the drawing using two exemplary embodiments and explained below j in the drawing shows:

1 shows the turning device in a side view;

2 shows the turning device in a plan view

corresponding to the line II-II in Fig. 1;

Fig.? a rear view, partly in section

along the line III-III in Fig. 2;

3A shows a sectional illustration of an individual part

of Fig. 3 along the line IIIA-IIIA in Fig. 3;

Fig. 4-7 rear views of the turning device

in different stages of movement;

Figure 7A is a sectional view of a detail

corresponding to VIIA-VIIA in Fig. 7;

FIG. 8 is a rear view of a turning device in FIG

modified embodiment similar to the Fig. 3;

9 is a plan view of part of the turning device; according to the embodiment according to Fig, 8;

Fig. Io is a front view of a detail

Fig. 8;

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The turning process is carried out with the help of a double-acting hydraulic cylinder 2 * 1 made, one of which Part, for example the piston rod 25, at the end eccentric to the turning shaft 3 of a rotating frame 2 attached crank arm 26 is articulated. The opposite end of the cylinder, in the exemplary embodiment So the head end 28 is via a bolt 29 on the

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11 is a side view of the detail according to ij

Fig. Lo;

12-15 the turning device according to the modified embodiment in different stages of movement.

The plow tree, which is indicated by 1 in FIG. 2 and carries the plow bodies, is connected to a turning shaft 3 Pivoting frame 2 attached. The turning shaft 3 is rotatably mounted in bearings 4.5 in the plow front frame 6, which at the same time forms the support frame for coupling the lower links 11, 12 of the three-point linkage. The coupling of the upper S handlebar 13 takes place in the usual way at the upper end of a centrally arranged on the plow front frame 6, upwards | pointing coupling part 7.

The two working positions offset by 180 ° from one another of the reversible plow are determined by two stops 16,17 (Fig. 3A and 7A), against the one on the back the plow front frame 6 attached locking bolt 18 comes to rest. So that the position of the plow bodies in their Working positions can be precisely defined and readjusted i, the stops 16, 17 are arranged vertically Slots 21, 22 out and can be fixed therein.

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one end of a lever 31 connected, the other End seated on a shaft 32 which is rotatably arranged in a bearing bush 33 provided in the coupling part 7. A pin 3o penetrating the outside of the bolt 29 prevents that the head end 28 of the cylinder 24 can fall out.

The rotary movement of the lever 31 is controlled by two on the coupling part 7 limits 35,36 fastened symmetrically to this and to the shaft 32. The lever 31 engages in the middle a tension spring 37, which the lever 31 with its upper end either against the stop 35 or against the stop 36 seeks to pull as soon as the lever reaches its dead center position has left. One end of the spring 37 is suspended in an eyelet 38 provided on the coupling part 7 and engages with its other end on a part 39 fastened to the shaft 32. The line of action of the spring goes here by the geometric axis of the bolt 29 when the lever 31 passes through its central position.

Inflow and outflow of the pressure medium acting on the hydraulic cylinder 24 takes place via, depending on the control Lines 42 and 43 »

So that after a quarter turn (9o °) the rotating frame 2 does not turn back into its previously left starting position can, a safety device 45 is provided on him, which when passing through the dead center position (Fig. 5, 6, 13, 14) momentarily falls into a notch 46 provided at the bottom of the plow front frame 6. This safety device 45 is located on a further crank arm 48 diametrically opposite the crank arm 26 and consists of a counterweight 49 rod 45 suspended from bolt 47 in a swinging manner, by the counterweight 49 regardless of the position of the crank arm 48 assumes an upright position.

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Look the Pig. 4-7 the reversible plow works as follows.

The starting position of the parts to be pivoted, i.e. one of the two working positions of the plow is shown in FIG. The lever 31 is aligned here the hydraulic cylinder 24. The stop 16 is supported on the locking bolt 18. In this working position is the hydraulic cylinder 24 is applied in the sense of an extension movement. The one resting on the locking bolt 18 Stop 16 prevents pivoting of the rotating frame 2 according to the arrow fl in Fig. 3 in the the boss 29 and the shaft 32 in alignment with the pivot point 4o of the piston rod 25 lie on the crank arm 26.

As soon as the hydraulic cylinder 24 is in the pressureless state before the turning movement is initiated, comes the tension spring 37 to the effect, the tensile force of which when the hydraulic cylinder was previously acted upon in the Meaning an extension movement was still overcome. In the pressurized state of the hydraulic cylinder, that is immediately at the beginning of the turning movement, the tension spring 37 pivots the lever 31 counterclockwise the left-hand stop 35 in the direction of turning in FIG. 4. From this moment on, the hydraulic one is supported Cylinder 24 on bolt 29 in its new position, in which the line of action no longer passes through the axis the shaft 32 provided at the end of the lever 31 opposite the bolt 29 runs. The turning process is initiated in that the hydraulic cylinder is acted upon via line 43 in such a way that the The piston rod is retracted and the crank arm 26 counterclockwise and in the direction of the arrow fl in FIGS. 3 and

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in the in Pig. 5 illustrated position is pivoted, in which the axes of the turning shaft 3, the AnI ^ ikpunktes 4o and the bolt 29 aligned with each other L.ind. As soon the piston rod is fully retracted, the safety gear 45 comes into engagement with the notch 46, so that the Pivoting frame 2 can no longer pivot back.

The hydraulic cylinder is then loaded in the opposite direction, i.e. the piston rod is extended. As a result, the tensile force of the spring 37 is overcome, so that the lever 31 comes free from the stop 35 and moves in the direction the host line of the hydraulic cylinder *? 24 sets, which now runs through the axis of the shaft 32, as FIG. 6 illustrates. However, since the rotating frame 2 has already reached its over-center position, further ejection of the piston rod causes further pivoting the rotating frame and thus the plow tree. Here, the lever 31 rotates in the direction of arrow f3 in Fig. 6 im Clockwise. While the lever 31 aligns, the crank arm 26 remains unchanged in its position and is through the Safety gear 45 held.

Before the piston rod is extended, the articulation point 4o of the crank arm 26 is in the line of action of the hydraulic one Cylinder and offset to the left by angle A in relation to the vertical (Fig. 5) · This over-center position enables the piston rod of the hydraulic piston rod pivoted into the position of FIG. 6 to be effectively engaged Cylinder, in which its line of action going through the articulation point 4o the axis of the turning shaft 3 with the distance L. happens (Fig. 6). During the further extension of the piston rod, the rotating frame moves into that shown in FIG. 7 Position until the stop 17 rests on the locking bolt 18 (FIGS. 7 and 7A). Supports itself during this movement the cylinder on the bolt 29 of the rotating lever 31,

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The tensile force of the spring 37 remains ineffective during this time. The position shown in Fig. 7 corresponds to the other Working position of the plow body which is symmetrical to that of FIG.

Because the hydraulic cylinder is not directly on the coupling part 7 but with the interposition of the lever 31 is hinged to this, the direction of its line of action changes in a time interval in which the crank arm 26 assumes a dead center position, whereby the VJirkungslinie beyond the geometric axis of the Turning shaft 3 comes to rest and this in turn generates a torque that is sufficient to achieve the previously known types to avoid difficulties encountered when passing through the dead center position.

The V. 'end process is in the opposite direction initiated in that the piston rod tangles retracted. whereby under the action of the spring 37 of the lever 31 with his the upper end of the stop 36 comes to rest. During the

length

pivoted from the position shown in Fig. 7 by 9o ° into the central position in which when passing through the Dead center position the safety gear 45 becomes effective. Of the hydraulic cylinder is then acted upon in the opposite direction, whereby the lever 31 into the position shown in FIG symmetrical center position is brought. The second half of the turning process is carried out accordingly until the stop 16 has reached the locking bolt 18.

The embodiment of FIGS. 8-15 differs from that of FIGS. 1-7 in that the lever 31 does not is interposed at the upper pivot point of the cylinder, but as a lever 131 between the lower end of the Piston rod 25 and the crank arm 26 is provided.

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As shown in detail in FIGS. 10 and 11, is the lever 131 is provided with a pin Io, which is on End of the crank arm 26 is hinged. At the other end of the lever 131 this carries a pin 132, which The end of the piston rod 25 receives articulated. The side of the lever has two stops I35j IJb, of which one comes to rest on a locking bolt 137, which is at the outermost end of the crank arm 26 is provided and limits the pivoting movement of the lever 131 with respect to the crank arm 26.

The pivoting movement of the lever 131 required to move the crank arm 26 into an over-center position is controlled by a helical compression spring I38 initiated. This compression spring I38 is supported with its one end 141 on the hydraulic cylinder 28 and with its the other end 142 on the coupling part 7. With this out

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directly via a bolt 143 on the coupling-θΐΐ 7 g

8-15 shows the following mode of operation of the reversible plow.

In one of the two working positions of the plow (Fig. 8), the hydraulic cylinder is acted upon in such a way that the piston rod holds the pin 132 in its lowest position, the pins 4o and 132 coming to lie in the line of action of the cylinder. In this position the stop 17 rests against the locking bolt 18. As a result of the extended piston rod, the compression spring 138 is open squeezed a certain amount. In this position, the stop 135 is at a distance from the crank arm 26 worn locking bolt 137.

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The turning process is initiated in that the piston rod 25 is now drawn in (FIG. 12). Under the action of the compression spring I38 of the hydraulic cylinder about the pin I ¹ O pivoted in the direction of the arrow f5, which has the result that the pin 132, to which the piston rod engages 25, _ rg in beäug to the other crank pin in the same · Direction, that is, it is pivoted clockwise until the stop 135 has come to rest against the locking bolt 137. From this moment on, the further retraction of the piston rod leads to a driving movement of the crank arm 26 and thus to the rotation of the rotating frame 2 with the turning shaft in the direction of the arrow fl in FIG with respect to the coupling part 7 as soon as the pin 132 and the turning shaft 3 are in the line of action of the hydraulic cylinder and thus in alignment with its pivot pin 143 (FIG. 13). In this position, the rotating frame 2 is at an angle A greater than half the angle of rotation (9o °) of the first phase of rotation, ie in a -.-.- over dead center position, out of which when the hydraulic cylinder is applied in the opposite direction and the hydraulic cylinder is ejected Piston rod can be brought into the other working position with security of the rotating frame.

Before this takes place, however, the safety device 45 engages into the notch 46 and prevents the rotating frame from pivoting back.

The second phase of rotation is initiated by ejecting the piston rod again. The lever 131 is around the pin 4o in the direction of the arrow f6 in 13 pivoted and displaced counterclockwise

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thereby in the position shown in Fig. 14, in which both pins 132 and 4o of the lever 131 are again in the line of action of the hydraulic cylinder and thus are in alignment with bolt 143. From this moment? .N the crank arm 26 is set in rotation and pivoted again in the direction of the arrow fl as soon as the line of action of the hydraulic cylinder has reached the distance "L" from the Axis of the turning shaft 3 has left (Fig. 14). The rotary movement is ended in the position shown in Fig. 15, as soon as the stop 16 comes to rest on the locking bolt 18 and the pins 4o and 132 are in the line of action of the hydraulic Cylinder and thus in alignment with bolt 143. This position corresponds to the other working position of FIG. 8.

The return of the plow to the working position corresponding to FIG. 8 is exactly the opposite, in this case If the stop Ϊ36 is in contact with the locking bolt 137 during the first phase of rotation.

The head end of the hydraulic cylinder does not need to be hinged to the coupling part 7. That `s how it is possible to place it at another point on the coupling part or at another point that protrudes upwards from the plow front frame Part to join.

Protection claims / 3

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Claims (5)

* j t- ■ · «t UM J T I M I I · ^^ Protection claims 1. Mounted reversible plow with hydraulic turning device with a crank arm attached to dam the plow tree supporting rotating frame for the articulated connection of a coupling part that rests in the center of the plow front frame and is supported by a double-acting hydraulic cylinder, one of which is connected to an articulation part mounted between the articulation points and acting as a crank arm and the lever between two stops has limited sweak movement, alternately against the stop located in Wenderichtang the lever at the beginning of the turning movement in the unpressurized state of the hydraulic cylinder to the plant and is held during the retraction of the piston rod, characterized in that one on the lever (31) or acting on the hydraulic cylinder (24) the spring (37 or 138) is provided, against the spring force of which the piston rod (25) closes immediately upon extension Beginning of the “wide half of rotation, the lever (31 or 131) comes free from the stop and shifts in the direction of the line of action of the hydraulic cylinder (24). 2. Turning device according to claim 1, characterized in that the lever (31) is mounted on the coupling part (7) and is articulated to the piston (28) of the hydraulic cylinder (24). - 14 7305774 08/11/77 1 I I I 11 (111 ·· · · -H- 3. Mounted reversible plow according to spoke 1, characterized in that »the lever (131) on the Karbeiarm (26) mounted and articulated to the piston rod (25) of the hydraulic cylinder (24). 4. Mounted reversible plow according to claim 2, characterized in that the spring is designed as a toothed spring (37) whose end (39) opposite the end engaging the coupling part (7) is suspended in the lever (31) is. 5. Mounted reversible plow according to claim 3 »characterized in that the two stops (135 * 136) to limit the pivoting movement of the lever (131) symmetrically on the rare edges of the lever (131) and to the pivot pin (4o) or to the articulation point (132) of the hydraulic cylinder (24) are arranged, of which in each case the one with reference to the turning shaft (3) outer stop attached to one at the extreme end of the crank (26) Lock bolt (137) can be supported. 6, mounted reversible plow according to claim 3, characterized in that the spring is designed as a compression spring (138), the one of which engages the coupling part (7) End opposite end (141) at the immediate on the coupling part (7) articulated part (28) of the i Lischen cylinder (24) from & can be supported. 7305774 08/11/77