Abstract:
A tool combination, including a share tip and an adjoining guide element, wherein the share tip and the guide element have threaded receptacles for fastening to a tine. An easy and secure fastening of both the share tip and the guide element is achieved according to this invention if the guide element has a threaded receptacle which is covered in the tool advancement direction by a cover portion of the share tip.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    This invention relates to a share tip for an agricultural soil cultivating machine, having a base part that has a blade on a blade holder, and the base part has a threaded opening for fastening to a support, in particular a tine of the agricultural soil cultivating machine. 
         [0003]    This invention also relates to a tool combination having a share tip and a guide element attached thereto, and the share tip and the guide element have threaded openings for fastening to a tine. 
         [0004]    2. Discussion of Related Art 
         [0005]    German Patent Reference DE 10 2011 102 053 A1 discloses a tool combination having a share tip and a guide plate, which can be fastened together to a tine of a soil cultivating machine. At a blade end, the share tip has a blade holder equipped with a blade element composed of hard metal. To the sides of the blade element, secondary blades are soldered to the blade holder at an angle. The blade holder has a threaded opening, which can be oriented so that it is flush with a threaded opening of the guide plate. The guide plate is placed onto the share tip and covers the areas of the surface adjacent to the blade and the secondary blades. In order to fasten the combination of the guide plate and the share tip, a fastening screw is inserted from the front through the flush threaded openings of the guide plate and the share tip and is screwed into a threaded opening of the tine. In harsh operating conditions and difficult ground conditions, the guide plate may be bent relative to the share tip and shorn off. This then causes a significant impairment to the functionality of the tool combination. 
       SUMMARY OF THE INVENTION 
       [0006]    One object of this invention is to provide a share tip of the type mentioned above and a tool combination having a share tip, which makes it possible to securely fasten the guide element and the share tip to a tine or similar support of an agricultural soil cultivating machine and in which at least one securing element is protected from wear. 
         [0007]    The above object and others according to this invention relating to the share tip is achieved if the base part has a recess, which is covered in the tool advancement direction by a covering section. The guide element can thus be accommodated with its free end protected behind the covering section. The guide element and securing element or screw in this region are thus protected from being struck by the soil material that is dug up by the share tip. In particular, the guide element then can no longer be bent or twisted at its free end relative to the share tip, thus assuring long-term functionality. 
         [0008]    According to one embodiment of this invention, it is possible for the recess to be open toward the back of the base part and for it to constitute or form an insertion socket from the side. The guide element is thus accommodated so that it is protected laterally as well and can be guided out of the recess region through the opening side. 
         [0009]    According to another embodiment of this invention, a share tip can be embodied so that the recess has at least one locking piece to provide a form-fitting locking of a guide element perpendicular to the tool advancement direction. With the locking piece, it is possible to secure the guide element and share tip to each other perpendicular to the advancement direction, thus achieving a reduction in the required number of fasteners, in particular fastening screws. 
         [0010]    In another embodiment of this invention, in the region of the recess, two locking pieces are used, which are spaced apart from each other perpendicular to the tool advancement direction. The guide element can then be enclosed between the two locking pieces. 
         [0011]    A stable tool design is achieved if in the region of or near the covering section, two locking pieces are formed onto the back side of the base part and the locking pieces constitute support surfaces. The guide element can be exactly aligned with the support surfaces. Because the locking pieces protrude from the back of the base part, the recess can be easily produced. In particular, the share tip can then be produced as a forged part with a low tool cost. 
         [0012]    A further stabilization of the locking pieces can be achieved if the recess has a connecting section, which connects the locking pieces to each other in integral fashion. This makes it possible to reliably carry away transverse forces. 
         [0013]    To simplify assembly, it is possible for an insertion socket of the recess to be laterally bordered by insertion bevels that are spaced apart from each other. Then the share tip can be attached to the guide element in a simple way. 
         [0014]    A share tip according to this invention can be embodied so that in front of the threaded opening in the tool advancement direction, a projection is provided, which protrudes up from a deflection surface of the share tip. The projection serves as a deflector for the soil material and guides it away from a screw head that is mounted in the threaded opening. The screw head is thus positioned in a way that protects it from wear. 
         [0015]    One object of this invention is also attained with a tool combination in which the guide element has a threaded opening, which is covered by a covering section of the share tip. In this case, the covering section is positioned in front of the guide element in the tool advancement direction so that it can be accommodated there in a protected way. As mentioned above, the guide element is thus protected from being struck by the soil material flowing past the guide element. 
         [0016]    In one possible variant of this invention, one or more locking pieces lock the share tip and the guide element to each other in a form-fitting fashion perpendicular to the tool advancement direction. Preferably, the share tip in this case is equipped with only one threaded opening. It is thus possible to reduce the number of required fastening elements in connection with the form-fitting locking action. The share tip can be simply attached to a mounted guide element if, in the region of its end oriented toward the share tip, the guide element has an insertion projection that is inserted laterally into the recess. 
         [0017]    The assembly is particularly simple if the insertion projection has two guide bevels that are arranged in a V shape relative to each other. 
         [0018]    A further service life optimization for the guide element can be easily achieved if in the connecting region to the share tip, a hard material element is mounted on the guide element. The hard material element can, for example, be an armored layer, in particular a deposit weld, or it is conceivable to mount hard material elements made of hard metal or the like to the guide element. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0019]    This invention is explained in greater detail below in view of an exemplary embodiment shown in the drawings, wherein: 
           [0020]      FIG. 1  is a perspective front view of a cultivator blade with a share tip and a guide element; 
           [0021]      FIG. 2  is a side view of the depiction shown in  FIG. 1 ; 
           [0022]      FIG. 3  is an enlarged view of a detail labeled in  FIG. 4 ; 
           [0023]      FIG. 4  is an enlarged view of a detail labeled IV-IV in  FIG. 2 ; 
           [0024]      FIG. 5  is a perspective detailed front view of the share tip of the cultivator blade according to  FIG. 1 ; and 
           [0025]      FIG. 6  is a perspective rear view of the share tip according to  FIG. 5 . 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0026]      FIG. 1  shows a cultivator blade for installation on a tool holder, in particular a tine  10  or tine holder or plow beam or the like of an agricultural soil cultivating machine. The tine  10  has a fastening part  11 , which has threaded openings  12  passing through it. With these threaded openings  12 , the tine  10  can be mounted on a device support. As  FIG. 2  also shows, on the side oriented away from the fastening part  11 , the tine  10  has a support piece  13 . A share tip  30 , a guide element  50 , and two plow wings  20  can be mounted onto this support piece  13 . 
         [0027]    The plow wings  20  have a transverse support  21  to which blade elements  22  made of a hard material are fastened. Preferably, the blade elements  22  are made of a hard metal that is integrally joined to the transverse support  21 , in particular soldered to it. The transverse support  21  has an angle piece  23  bent up from it, which is equipped with threaded openings. The plow wings  20  can be fastened to the tine  10  by fastening screws  14  that are inserted through the threaded openings of the angle piece  23  and the threaded openings of the support piece  13 . The guide element  50  with the fastening part  11  is mounted above the plow wings  20 . 
         [0028]    As shown in  FIGS. 1 and 2 , the guide element  50  is composed of or comprises a sheet-like forged steel component. It is curved so that it forms a helical deflection surface. Sometimes, rectilinear deflection surfaces are also used. Hard material elements  56  in the form of a deposit weld are attached to this deflection surface. The guide element  50  also has a threaded opening  57  that is clearly visible in  FIG. 1 . A fastening screw can be inserted through the threaded opening  57 . This fastening screw is guided through a threaded opening of the support piece  13  and secured by a nut.  FIG. 1  shows that an arc-shaped hard material element  56 , particularly in the form of a deposit weld or hard metal elements, is situated or positioned in front of the threaded opening  57  in the tool advancement direction V (tool advancement direction V, indicated in  FIG. 2 ). This hard material element  56  serves as a deflector for soil flowing past or beyond. The screw head of the fastening screw  15 , which is secured in sunken fashion in the threaded opening  57 , is thus protected from the abrasive wear of the soil. 
         [0029]    As shown in  FIGS. 2 and 3 , the guide element  15  is also fastened to the tine  10  by a second fastening element, in particular a fastening screw  15 . The guide element  50  has another threaded opening  16  for this purpose. This threaded opening  16  is situated or positioned flush with a threaded opening  57  of the support piece  13  of the tine  10 . A fastening screw  15  can be inserted through the flush threaded openings  57  and  16  and secured at the back with a nut. The two fastening elements  15  thus securely attach the guide element  50  at two fixing points. As shown in  FIG. 3 , the fastening elements  15  are embodied in the form of fastening screws equipped with a screw head  15 . 1 . The geometric embodiment of the screw head  15 . 1  and the threaded opening  57  is such that the screw head  15 . 1  is either essentially flush with the surface of the front of the guide element  50  or is accommodated in a recessed fashion. This is clearly shown in  FIG. 3 . 
         [0030]      FIG. 4  also shows that the threaded opening  57  is provided in an insertion projection  51  of the guide element  50 . The insertion projection  51  has two guide bevels  54  that are arranged in a V shape relative to each other and they transition into side pieces  52 . The side pieces  52  are situated in the region of an end  53  of the insertion projection  51 . 
         [0031]    In order to complete the cultivator blade, a share tip  30  is mounted to the tine  10 . The design of the share tip  30  is shown in greater detail in  FIGS. 5 and 6 . As these drawings show, the share tip  30  has a base part  31  through which a threaded opening  33  passes. An identification field  32  is provided above the threaded opening  33 . Below the threaded opening  33 , there is a projection  34 . 1 , which in the form of a deflector, protrudes up from the front deflection surface  34  of the base part  31 . In this way, the projection  34 . 1  constitutes or forms an apron that protects a screw head situated in the threaded opening  33  from the abrasive action of the soil flowing past. In front of the projection  34 . 1  in the advancement direction, the base part  31  has steps  35  that protrude up from the deflection surface  34 . In the present exemplary embodiment, the steps  35  are rib-shaped and oriented perpendicular to the tool advancement direction. There are hollows  36  between the individual steps  35 . During use of the tool, soil can be compressed into the region of the hollows  36  and accumulate there. This forms a type of natural wear protection on the deflection surface  34 . In front of the steps  35  in the tool advancement direction, the base part  31  has a blade holder  37 . Blade elements  40  in the form of hard metal elements are fastened to the blade holder  37 . The blade elements  40  have a sheet-like fastening section  40 . 1  and formed onto the latter, a shoulder  40 . 2  protruding away from the tool advancement direction V. A blade  40 . 3  is produced in the region of or near the shoulder  40 . 2 . The blade elements  40  are fastened to the blade holder  37  so that the free terminal edge of the blade holder  37  is at least partially enclosed by the shoulders  40 . 2  of the blade elements  40 , as is clearly shown  FIG. 2  and also  FIG. 6 . This protects from wear the free end of the blade holder  37 . Behind the blade elements  40  in the advancement direction, hard material elements  21  are mounted onto the edge regions of the base part  31  that are subjected to particularly intense wear. In the present case, hard material elements  41  embodied in the form of hard metal plates are soldered to the base part  31 . It is also possible, however, to use an armored weld or the like. 
         [0032]      FIG. 6  shows a rear view of the share tip  30 . As is clear from this depiction, projections  39  are formed onto the base part  31  in the region above the blade holder  37 . The projections  39  are embodied in the form of ribs and are situated in the region of the longitudinal edges of the base part  31 . The projections  39  are spaced apart from each other so that a slot  39 . 1  is formed between the projections  39 . At the end oriented away from the blade holder  37 , the share tip  30  has a recess  38 . The recess  38  is formed in a pocket shape into the back of the share tip  38 . It has a covering section  38 . 1 . The covering section  38 . 1  is adjoined at the sides by insertion bevels  38 . 2  in the form of wall elements. The wall elements in this case are arranged in a V shape relative to each other. Locking pieces  38 . 3  are situated in the region below the insertion bevels  38 . 2 . The locking pieces  38 . 3  are spaced apart from each other and are likewise composed of or comprise wall elements that rise up from the covering section  38 . 1 . The two locking pieces  38 . 3  are integrally joined to each other by a bottom  38 . 4  of the recess  38 . 
         [0033]    In order to assemble the share tip  30 , the recess  38  is slid onto the insertion projection  51  of the guide element  50 . As shown in  FIG. 4 , in this joining motion, the insertion projection  51  of the guide element  50  can be threaded into the insertion bevels  38 . 2 , thus enabling a precise assembly. After the insertion projection  51  has passed the insertion bevels  38 . 2 , the end  53  of the insertion projection  51  slides between the two locking pieces  38 . 3 . In this case, the dimensional association is selected so that the locking pieces  38 . 3  are laterally associated with the side pieces  52 . As a result, the share tip, taking into account a design-required minimal play, is fixed against the locking pieces  38 . 3  in a form-fitting fashion perpendicular to the tool advancement direction. In order to provide a definite seat in this case, the bottom  38 . 4  and the end  53  of the insertion projection  51  are spaced apart from each other (see the play or space S in  FIG. 4 ). The insertion bevels  38 . 2  are also situated so that they are spaced slightly apart from the guide bevels  54  (see the play or space S in  FIG. 4 ). 
         [0034]    After the recess  38  of the share tip  30  has been affixed to the insertion projection  51  of the guide element  50 , the threaded opening  33  of the share tip  30  is situated flush with a threaded opening of the tine  10 . Then a fastening screw can be inserted through the flush threaded openings and the share tip  30  can be affixed to the tine  10  with only one fastening screw. The rotationally secured association of the share tip  30  with the tine  10  is thus ensured by the form-fitting locking action between the insertion projection  51  and the recess  38 . 
         [0035]    In the assembled state, the share tip  30  protrudes up from the surface of the guide element  50  in the region of or near the recess  38  with its deflection surface  34  that ends there. As shown in  FIG. 3 , this produces a shoulder with a protrusion T. This protrusion T once again serves as a deflector, which deflects soil away from the screw head, which is secured in the threaded opening  57  (see  FIG. 1 ). In order to be able to reliably fulfil this function, the spacing dimension T should be at least 8 mm. An optimal wear protection is achieved with a protrusion &gt;12 mm.