Grindel adjustment of a soil tillage tool

Abstract

A leg adjustment (2) of a soil cultivation tool (3) with a leg (4) for receiving in a guide slot (5) of a soil cultivation device (1), wherein the leg (4) and the guide slot (5) have at least one rotationally symmetrical recess (6, 7) transverse to the leg profile, which are aligned approximately parallel to one another, wherein a securing bolt (8) is provided, which, when inserted into the recess (6, 7), secures the leg (4) radially to the rotationally symmetrical recess (6) of the guide slot (5) against movement, wherein lateral stops (10, 11) of the guide slot (5) are arranged in the leg direction (9) at a distance from the recess (6, 7), which limit the movement of the leg (4) in rotation about the axis (12, 13) of a recess (6, 7), characterized in that the securing bolt (8) has at least two rotationally symmetrical surfaces (14, 15) which are in contact with the recesses (6,7) of the slide (4) and the guide slot (5) correspond and which are eccentrically offset from one another with an offset (a), wherein the slide (4) performs a translational movement relative to the guide slot (5) upon rotation of the securing bolt (8), which movement takes place in the region of its recess (7) perpendicular to the radial alignment of the eccentric offset (a) around the axis (12) of the at least one recess (6) of the guide slot.

Description

The invention relates to a burring adjustment of a soil working tool according to the preamble of claim 1.Floor processing devices have a frame with which individual floor processing tools are guided through the floor surface to be processed in a manner spaced apart from one another. In this case, the connection between frame and soil working tool is effected by a holding arm or a grindel. In order to set various angles of attack of the soil working tool, setting devices on the intermediate frame and holding arm or grindel are known. For example, German utility model DE 20 2012 002 916 U1 shows a holding arm of a rotating disk tool which can be adjusted about a pivot axis relative to the frame. In this case, further recesses are arranged concentrically to the pivot axis, into which recesses a specific arm position relative to the frame can be plugged or fixed. A device which is in principle similar is known from German Utility Model DE 7 835 771 U1. Here too, the arm movement takes place about a pivot axis relative to the frame. By means of two mutually engaging eccentric bushes which extend in opposite directions and which engage in a second recess of the arm, an arm movement can be effected concentrically about the pivot axis. Both solutions have a recess for receiving a clamping screw at the most critical arm cross section. In the event of continuously changing or oscillating load, as occurs on a soil working device, there is a risk of loss of the soil working tool. This is aided by a generally larger arm cross section or a local reinforcement, which, however, are more expensive, heavier or expensive to produce.It is the object of the invention to provide a burr adjustment for different positioning of a soil working tool, which eliminates the disadvantages described above and is cost-effective to manufacture and can be adjusted in practice.This object is achieved by the features of the characterizing part of claim 1.By arranging a grid with a preferably rectangular cross section in a guide slot which has an outlet cross section matching the grid at its grid outlet end, a grid setting is created which does not require a strength-critical recess in the profile of the grid in the bend-critical region of the grid, namely at the outlet cross section of the guide slot. An eccentric securing bolt secures the grindel against being pulled out of the guide slot. The recesses required for the securing bolt are arranged in the middle region of the guide slot or on the end of the grindle and thus outside the bending-critical cross section of the grindel. By rotating the eccentric securing bolt, in cooperation with the outlet cross section of the guide slot, which is formed in particular by two lateral stops, an angular adjustment of the grindle relative to the outlet cross section of the guide slot takes place. The superimposed translatory movement of the grinding wheel relative to the outlet cross section of the guide slot is negligibly small and is at most twice the amount of eccentricity of the securing bolt. The illustrated adjusting mechanism is similar to a crank drive in which the eccentric securing bolt represents the crank, the grindel represents the connecting rod and the guide slot represents the sliding guide of the connecting rod. The momentary translatory movement of the recess of the grindle runs on the path curve which the eccentric of the securing bolt executes about the bolt axis. Since the recess of the grindle is spaced apart from the lateral stops of the guide slot, the grindel simultaneously performs the desired angular movement relative to the guide slot during the rotation of the securing bolt.By using the securing bolt as the only translatory movement securing means of the grinding wheel relative to the guide slot in the direction of the profile of the grinding wheel, a cost-effective and simple adjustment possibility is provided without securing the grinding wheel against longitudinal displacement by means of further handles or means.By a multipart design of the securing bolt, its production or assembly can be simplified even further. For example, the eccentric can be pushed onto the bolt axis by means of an eccentric bore or recess.By means of a positive or non-positive rotational fixing of the securing bolt in a plurality of alignments, reasonable adjustment positions of the grindle relative to the guide slot can be predefined. For example, the securing bolt can be raised by a transverse pin against spring force out of a cross-link and, in another position, can be lowered positively therein. Other locking means, for example positively or non-positively engaging around the securing bolt, are conceivable.Due to the approximate axial alignment of at least one lateral stop of the grindle in the guide slot, which is formed for example by a cross-sectional edge at the outlet cross-section of the guide slot and is aligned with the penetration region of the soil working tool into the soil, an optimal angular adjustment of the soil working tool in the penetration region takes place without any appreciable translatory displacement of the soil working tool being associated therewith. The axial alignment represents an imaginary straight line which intersects a lateral stop and runs approximately parallel to the axis of rotation of the securing bolt to the ground surface and meets the penetration region of the ground machining tool.By assigning the burring setting to the end of the grindle to which the soil working tool is fastened, an angle of attack setting can follow in the immediate vicinity of the soil working tool.By the assignment of the burr adjustment to the burr end opposite the soil working tool, namely on the frame side, an adjustment of the eccentric securing bolt can be effected conveniently above the soil surface.By the movable mounting of the grindel setting about a pivot axis relative to the frame of the soil working device, a further degree of freedom for the movement of the soil working tool is created. Preferably, this pivot axis is oriented horizontally or vertically to the ground or transversely to the direction of travel.If the garden tool or its adjusting device is equipped with an overload protection device, the garden tool or the soil working tool can yield when it hits an obstacle without deforming or destroying the adjusting device or the garden tool. The overload protection can be realized in cooperation with the aforementioned pivot axis via a spring or energy store which is arranged at a distance from the pivot axis, but also via a simple shear bolt. An elastic or resilient mounting within the swivel shaft is also conceivable.If the grindel is designed to be resilient or elastic, it itself takes on the function of an overload protection device or can support a soil comminution effect of the soil working tool by its resilient effect, for example in the form of a leaf spring.The setting of the burr has proven to be very helpful and effective, in particular in conjunction with share tools, plough tools or disk or spade tools rotating about an axis, in order to set various angles of attack of the aforementioned tools quickly and easily.The invention is distinguished in particular in that a stable sliding guide is created in a guide slot for a soil working tool, wherein a simple angle of attack adjustment of the soil working tool is carried out in several steps or continuously by simple rotation of an eccentric securing bolt.Further details and advantages of the subject matter of the invention will become apparent from the following description and the associated drawings, in which an exemplary embodiment with the necessary details and individual parts is shown. The following are shown: FIG. 1 is a side view of a floor treatment device, FIG. 2 shows a perspective detailed view of the grindel setting, FIG. 3 is a perspective partial view of the grindel adjustment, FIG. 4 is a view like FIG. 3 with a different gridded-air layer; and FIG. 5 shows a design proposal of the securing bolt.FIG. 1 shows a towed soil cultivation device 1, which is towed and / or supported by a towing tractor 22 with an upper link 24 and two lower links 23. The links 23, 24 are movably coupled to the machine frame 20. A drawbar attachment with chassis is also conceivable. The soil working device 1 can be followed by an adjustable support roller or the like for depth guidance of the soil working tools 3. From the machine frame 20 there extend laterally two transverse tubes 21, 21' which are spaced apart from one another in the direction of travel and are connected fixedly or movably to the machine frame 20. At regular intervals, bearing pockets 26 are arranged laterally next to one another on the respective transverse tubes 21, 21'. The guide tracks 5 are pivotably mounted transversely to the direction of travel about the axis 18 and are held in the position shown by the overload protection 19. From the guide slots 5, grindel 4 are guided to the rear. These grindels 4 are bent downward and each hold a soil working tool 3 which is in engagement with the soil 25. The soil working tools 3, here for example serrated hollow discs, are rotatably fastened by means of a screw connection to the lower grindel end 16 of the grindel 4 via a bearing 27. Clamping or wedge connections are likewise conceivable. The axis of rotation of the bearings 27 is oriented somewhat obliquely upwards and forwards in the direction of travel in order to ensure cutting and mixing of soil material. As a result, a characteristic cutting angle is established for the soil working tool, which is to be adjusted appropriately depending on the soil condition, working depth and soil fouling, in the case of hollow disc tools, in particular about the vertical axis. The front and rear soil working tools 3 following one another are oriented to the right and left in the direction of travel. Other orientations and arrangements are also possible.FIG. 2 shows a perspective detailed representation of the burr adjustment 2 with the essential components. A transverse tube 21 extends transversely to the direction of travel and parallel to the ground, on which a bearing pocket 26 is arranged here by way of example. Around its axis 18 running parallel to the transverse tube 21, the guide link 5 is mounted pivotably upwards and is held in the position shown by the overload protection 19. The overload protection 19 consists of an energy store held by a frame-side abutment, here for example a spiral spring, which pretensions the guide link and thus the grindel 4 and the soil working tool 3 with a force in the ground direction at a distance from the axis 18. With an inner stop tab, the guide link 5 is held in the end position shown and can yield upwards in the event of overload. Other energy storage devices such as hydraulic cylinders, etc., are conceivable. The guide link 5 consists of a rectangular cavity tapering towards the rear, in which the sliding plate 4 is inserted from the rear with its matching rectangular cross section. The lateral movement of the sliding rail 4 is translationally limited by the rear stops 10, 11 of the guide link 5, wherein it can swivel back and forth in the same plane of movement with its front end 17 which protrudes into the link. The guide link 5 has a lower and upper cover 28, 29. A securing bolt 8 is inserted into these recesses 6 from below, and is secured against falling out at the top with a washer and a self-locking nut as securing means 30. Likewise, the securing bolt 8 can be inserted in another position and also secured against loss or automatic adjustment by other securing means. Here, a recess 7 in the form of a bore is likewise made in the grindel 4, through which the securing bolt 8 projects. By means of this connection between the securing bolt 8, the guide link 5 and the sliding rail 4 and the respective recesses 6, 7, the sliding rail 4 is fixed against undesired movement in cooperation with the rear stops 10, 11 and the covers 28, 29 of the guide link 5. The lateral stops 10, 11 can be housing edges or surfaces of the guide link 5, but likewise also spacer tubes or similar elements which are inserted, clamped or inserted between the upper and lower covers 28, 29. The securing bolt 8 with its securing means 30 takes over a clamping effect. The rear stop can cooperate as a one-piece bolt in cooperation with an elongated, second break-out of the grindle 4, although the griddle 4 is optionally weakened in the bending cross section by this second break-out. The securing bolt 8 has a rotationally symmetrical, eccentric surface 15 in the region of the grind stone 4, with the result that, by rotating the securing bolt 8 about its own axis 12, the grind stone 4 is displaced within the guide slot 5 in accordance with the eccentric distance a of the securing bolt 8. The axis 12 extends through the recesses 6 of the guide slot 5. the axis 13 forms the axis of rotation of the eccentric of securing bolt 8 at a distance or eccentricity a from the axis 12. the axis 13 extends through the concealed recess 7 of the grinding stone 4. an angle change of the grinding stone end 17 in the guide slot brings about at the other grinding stone end 16 a change in the cutting angle of the ground working tool 3 fastened thereto. the angle change takes place about one of the two stops 10, 11 in this case. the translatory movement of the grinding stone 4 in the grinding direction 9 is negligibly small and has no appreciable influence on the work of the ground working tool 3, as illustrated or indicated by the axial alignment 35. The axial alignment 35 preferably runs parallel to the axes 12 and 13 and thus perpendicular to the plane of movement of the grindle 4 within the guide slot 5.FIG. 3 shows the essential components for the interaction between the guide link 5 and the grindel 4; the guide link 5 is arranged pivotably in the bearing pocket 26, which is welded or screwed to the transverse tube 21. The securing bolt 8 is inserted from below into the recess of the guide slot 5. The central eccentric region of the securing bolt 8 is located in the recess 7 of the grind stone 4; the axis 12 of the recesses of the guide link 5 and the axis 13 of the recess 7 of the grind stone 4 or of the eccentric surface 15 of the securing bolt are offset to the left in the direction of travel by the amount a. As a result, the grindel 4 or its front end 17 is pivoted to the left about the stop 10 or 11.FIG. 4 shows the same situation as FIG. 3, but the eccentric region of the securing bolt 8 is pivoted forward with the offset a in the direction of travel. The grindel 4 is displaced forwards by approximately the amount a and assumes a central angular position within the guide slot 5. If it is desired to rotate the eccentric securing bolt 8 further to the right in the clockwise direction, the grindel also pivots about the stop 10 or 11 to the right in the direction of travel and assumes the other extreme angular position. By skillful selection of the stop positions 10, 11, a further, for example fourth angular position of the grindle 4 results when the securing bolt 8 is rotated to the rear.In FIG. 5, the eccentric securing bolt 8 is shown. Concentric about the axis 12 are the surfaces 14 and 31. Eccentrically offset by the amount a, the surface 15 is arranged rotationally symmetrically about the axis 13. The axes 12 and 13 are thus likewise spaced apart from one another by the distance a. The surfaces 14 and 31 are mounted in the corresponding recesses 6 of the guide slot 5, and the surface 15 in the recess 7 of the grindel 4, as described above. In order to avoid tilting of the securing bolt 8 in the recess 7 of the grindle 4, the shape is not cylindrical, but rather is designed in a spherical manner or with different diameters over the height. Concentrically to the axis 12, a further extension of the surface 32 is arranged at the upper end for receiving a securing means 30, for example a thread for receiving a self-securing nut. The lower collar 33 of the securing bolt 8 forms the axially effective stop surface against the lower cover 28 of the guide slot. The collar 33 is designed with a square in a commercial width of the wrench. A hexagon or another shape is likewise conceivable. Thus, a rapid rotation of the securing bolt can take place without great force exertion. According to the aforementioned forms, a circumferential groove 34 is incorporated in the collar 33, which groove, in cooperation with a resilient stop, constitutes a means of preventing rotation against the guide link. Here, for example, a wire spring engages in the groove, which is spring-mounted on the guide link. This results in, for example, four or six locking positions corresponding to the aforementioned collar shapes. The securing bolt 8 can likewise be provided with a further adjusting or actuating handle. In the same way, a transverse pin or the like can be arranged in the securing bolt 8, which is worked into a cross groove of the guide link, for example. A spiral spring between the securing means and the guide slot permits axial deflection of the pin out of the cross groove in order to rotate the securing bolt. Instead of the cross groove, other recesses or locking shapes are conceivable.LIST OF REFERENCE CHARACTERS1 Ground treatment device 2 Grindel setting 3 Ground treatment tool 4 Grindel 5 Guide link 6 Recess (guide link) 7 Recess (grindel) 8 Securing bolt 9 Grindel direction 10 Stop 11 Stop 12 Axis 13 Axis 14 Rotationally symmetrical surface 15 Rotationally symmetrical surface 16 Grindel end 17 Grindel end 18 Axis 19 Overload protection 20 Frame 21 Transverse tube 22 Traction tractor 23 Link 24 Link 25 Ground 26 Bearing pocket 27 Bearing 28 Cover 29 Cover 30 Securing means 31 Rotationally symmetrical surface 32 Surface 33 Collar 34 Groove 35 Axial alignment 36 Penetration region

Claims

A grindle setting (2) of a soil working tool (3) having a grindle (4) for receiving in a guide slot (5) of a soil working device (1), wherein the grindle (4) and the guide slot (5) have at least one rotationally symmetrical recess (6, 7) transversely to the grindle profile, which recesses are aligned approximately parallel to one another, wherein a securing bolt (8) is provided which, inserted into the recess (6, 7), secures the grindle (4) radially with respect to the rotationally symmetrical recess (6) of the guide slot (5) against movement, wherein lateral stops (10, 11) of the guide slot (5) are arranged at a distance from the recess (6, 7) in the grindle direction (9), said lateral stops limiting the movement of the grindle (4) rotationally about the axis (12, 13) of a recess (6, 7), characterized in that, the securing bolt (8) has at least two rotationally symmetrical surfaces (14, 15) which correspond to the recesses (6, 7) of the sliding rail (4) and the guide slot (5) and which are eccentrically offset with respect to one another by an offset (a), wherein the sliding rail (4) performs a translatory movement relative to the guide slot (5) upon rotation of the securing bolt (8), which movement takes place in the region of its recess (7) perpendicularly to the radial alignment of the eccentric offset (a) about the axis (12) of the at least one recess (6) of the guide slot.The sliding gear setting according to claim 1, characterized in that the securing bolt (8) forms the only translatory movement securing means of the grindle (4) with respect to the guide link in the direction (9) of the sliding gear profile.The sliding setting according to claim 1 or 2, characterized in that the securing bolt (8) is formed in multiple parts.The sliding setting according to any one of the preceding claims, characterized in that the securing bolt (8) is designed to be fixable rotationally positively or non-positively in a plurality of orientations.The garden tool setting according to any one of the preceding claims, characterized in that the axial alignment (35) of at least one lateral stop (10, 11) is aligned approximately with the penetration region (36) of the soil working tool (3) into the soil (25).The garden tool according to any one of the preceding claims, characterized in that the garden tool (2) is associated with the one end (16) of the grindle (4) to which the soil working tool (3) is fastened.The garden setting according to any one of the preceding claims, characterized in that a soil working tool (3) is associated with one garden end (16) and the garden setting (2) is associated with the other frame-side garden end (17).The gardener setting according to any one of the preceding claims, characterized in that the gardener setting (2) is mounted on the frame side such that it can be pivoted about a further axis (18), which is preferably oriented transversely to the direction of travel.The garden setting according to any one of the preceding claims, characterized in that the garden setting (2) is equipped with an overload protection (19).The garden tool setting according to any one of the preceding claims, characterized in that the garden tool (4) is resilient or elastic.The garden setting according to any one of the preceding claims, characterized in that the soil working tool (3) assigned to the end of the grindle (4) is a share tool, a plough tool or a rotating disc or spade tool.

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