Abstract:
A cutting ring for quarrying, including a number of cutting inserts which are arranged in cutting insert grooves which extend continuously in an axial direction, allowing the cutting ring to be produced in a relatively simply manner and to have a long service life.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application is a U.S. National Phase Patent Application based on International Application Serial No. PCT/EP2013/071054 filed Oct. 9, 2013, the disclosure of which is hereby explicitly incorporated by reference herein. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    The invention relates to a cutting ring of a cutting roller for quarrying and to a cutting roller for quarrying. 
         [0004]    2. Description of the Related Art 
         [0005]    Such a cutting ring is known from U.S. Pat. No. 7,401,537 B1. The prior cutting ring is equipped with circumferentially closed cutting insert seats shaped as holes formed by boring. Cutting inserts are disposed in the cutting insert seats and are held therein by a press fit. Intermediate portions located between the cutting inserts are hardened by laser machining 
       SUMMARY OF THE INVENTION 
       [0006]    The present invention provides a cutting ring that is distinguished by a relatively long service life combined with relatively simple production. 
         [0007]    By virtue of the fact that in the inventive cutting ring the cutting insert seats are continuous in the axial direction and are formed with stop walls only in the circumferential direction, the cutting inserts can be inserted in and reliably fixed in the cutting insert seats, particularly by being slid in in the axial direction. 
         [0008]    Further useful embodiments and advantages of the invention will be emerge from the following description of exemplary embodiments, read with reference to the figures of the drawing. 
         [0009]    In one form thereof, the present invention provides a cutting ring for a cutting roller for quarrying, including a number of cutting inserts disposed in cutting insert seats, characterized in that the cutting insert seats are formed as cutting insert grooves that are continuous in the axial direction. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]    The above mentioned and other features and objects of this invention, and the manner of attaining them, will become more apparent and the invention itself will be better understood by reference to the following description of embodiments of the invention taken in conjunction with the accompanying drawings, wherein: 
           [0011]      FIG. 1  is a side view of an implementation of a cutting roller for quarrying, comprising an exemplary embodiment of a cutting ring according to the invention; 
           [0012]      FIG. 2  shows the implementation according to  FIG. 1  in a front view; 
           [0013]      FIG. 3  is a side view of another implementation of a cutting roller for quarrying, comprising another exemplary embodiment of a cutting ring according to the invention; 
           [0014]      FIG. 4  shows the implementation according to  FIG. 3  in a front view; 
           [0015]      FIG. 5  shows the implementation according to  FIG. 1  or  FIG. 3  in a side view; 
           [0016]      FIG. 6  is an enlarged detail of a front view of an exemplary embodiment of a cutting ring according to the invention; and 
           [0017]      FIG. 7  is an enlarged sectional view of the exemplary embodiment according to  FIG. 6 . 
       
    
    
     DETAILED DESCRIPTION 
       [0018]      FIG. 1  shows a sectional view of an exemplary embodiment of an implementation of a cutting roller  1  for quarrying, particularly by means of a tunnel boring machine, having a fixed cutting roller shaft  2 . The cutting roller shaft  2  bears a flange-side cover  3  that abuts a ring shoulder  4  formed in an end region of the cutting roller shaft  2 . Disposed between the flange-side cover  3  and the ring shoulder  4  is a sealing ring  5 . At a radial distance from the cutting roller shaft  2 , the flange-side cover  3  bears a portion of a ring sealing unit  6  that extends around the cutting roller shaft  2  and rests by another portion radially outwardly on a first shaft bearing body  7  and bears against a first seal carrier  8  disposed radially outward from the first shaft bearing body  7 . Disposed at a radial distance from the first shaft bearing body  7  is a first cutting ring bearing body  9 , a number of first bearing rollers  10  being disposed between the first shaft bearing body  7  and the first cutting ring bearing body  9 . 
         [0019]    On the side of the first shaft bearing body  7  facing away from the flange-side cover  3 , the cutting roller shaft  2  is surrounded by a compression ring  11 , on whose side facing away from the shaft bearing body  7  is disposed a second shaft bearing body  12 , which, like the first shaft bearing body  7 , surrounds the cutting roller shaft  2 . 
         [0020]    Disposed at a radial distance from the second shaft bearing body  12  is a second cutting ring bearing body  13 , a number of second bearing rollers  14  being disposed between the second shaft bearing body  12  and the second cutting ring bearing body  13 . Disposed on the side of the second shaft bearing body  12  facing away from the compression ring  11  is a second ring sealing unit  15 , which rests by a portion on the second shaft bearing body  12  and bears against a second seal carrier  16  disposed radially outward from the second shaft bearing body  12 , while another portion of the second ring sealing unit  15  engages in a thread-side cover  17  disposed on the side of the shaft bearing body  12  facing away from the compression ring  11 . The thread-side cover  17  can be screwed by means of an edge shaft nut  18  onto an external thread formed on the cutting roller shaft  2 , thereby fixing the aforesaid components in the axial direction. 
         [0021]    It can also be seen from the representation according to  FIG. 1  that disposed on the radially outward-facing sides of the first flange-side cover  3 , of the first seal carrier  8 , of the first cutting ring bearing body  9 , of the second cutting ring bearing body  13 , of the second seal carrier  16  and of the thread-side cover  17  is a roller base body  19 , which engages between the first cutting ring bearing body  9  and the second cutting ring bearing body  13  by a centering shoulder  20  directed radially toward the cutting roller shaft  2  and is fixedly connected to the first cutting ring bearing body  9  and the second cutting ring bearing body  13 . The roller base body  19  is thus able to rotate relative to the cutting roller shaft  2 . 
         [0022]    Attached to the side of the roller base body  19  facing away from the cutting roller shaft  2  in the radial direction is an exemplary embodiment of a cutting ring  21  according to the invention, which in the implementation according to  FIG. 1  rests in the axial direction against a stop shoulder  22  formed circumferentially on the roller base body  19 , and on the opposite side from the cutting ring stop shoulder  22  is fixed in the axial direction by a releasable lock ring  23 , which in turn is disposed in a lock ring groove  24  formed in the roller base body  19 . The lock ring  23  thus is configured to be detachable from the roller base body  19 , such that after the removal of the lock ring  23 , the cutting ring  21 , in the exemplary embodiment of  FIG. 1 , can be removed from the roller base body  19  by being slid off in the axial direction and is therefore replaceable. 
         [0023]    The cutting ring  21  carries in a radially raised outer portion  25  a number of cutting inserts  26  made of a harder material than the material of the cutting ring  21 . 
         [0024]      FIG. 2  is a front view of the exemplary embodiment of a cutting roller  1  according to  FIG. 1 . It can be seen from the representation according to  FIG. 2  that the cutting inserts  26  are arranged equidistantly apart over the entire circumference of the cutting ring  21 , there being a respective intermediate web portion  27  of the cutting ring  21  between each set of adjacent cutting ring inserts  26 . 
         [0025]    It can also be seen from the representation according to  FIG. 2  that the cutting ring inserts  26  are disposed in cutting insert grooves  28 , as cutting insert seats, that extend in the axial direction all the way through the raised outer portion  25  of the cutting ring  21  and terminate axially outwardly and—at least in new condition—radially outwardly flush with the intermediate web portions  27  of the cutting ring  21 . 
         [0026]      FIG. 3  is a cross section of another implementation of a cutting roller  1  for quarrying, particularly by means of a tunnel boring machine, it being noted that, to avoid repetition, like elements in the implementation according to  FIGS. 1 and 2  and the implementation according to  FIG. 3  have been given the same reference numerals and will not be described in more detail below. In deviation from the implementation of the cutting roller  1  according to  FIG. 1  and  FIG. 2 , in the cutting roller  1  according to  FIG. 3  the cutting ring  21  has three raised outer portions  25 , each of which bears a number of cutting inserts  26 . It can also be seen from the representation according to  FIG. 3  that the cutting ring  21  is embodied as solid and, similarly to the roller base body  19  in the implementation according to  FIG. 1  and  FIG. 2 , is placed on the radial outer sides of the covers  3 ,  17 , of the seal carriers  8 ,  18  and of the cutting ring bearing bodies  9 ,  13 . 
         [0027]      FIG. 4  is a front view of the implementation of the cutting roller  1 , from which representation according to  FIG. 4  it can be seen that the cutting insert grooves  28  are arranged in the outer portions  25  in such a way that a respective three cutting insert grooves  28  in different outer portions  25  are aligned with one another in the axial direction. This alignment is useful for production reasons. 
         [0028]      FIG. 5  shows the exemplary embodiments of cutting rollers  1  according to  FIGS. 1 to 4  in side view. It is particularly clear from the representation according to  FIG. 5  that the cutting inserts  26  are exposed on the axially outward side. 
         [0029]      FIG. 6  is a detail view of a cutting ring  21  according to the invention in the region of three cutting inserts  26 , disposed in cutting insert grooves  28  that are continuous in the axial direction and are spaced apart from one another by intermediate web portions  27  of the cutting ring  21 . It can be seen especially clearly from the representation according to  FIG. 6  that the cutting inserts  26  terminate by their respective outer contours flush with the intermediate web portions  27 , thus eliminating the risk of excessive singular stresses on the cutting inserts  26  due to protruding regions. 
         [0030]      FIG. 7  is a detailed side view of a number of cutting inserts  26  disposed in cutting insert grooves  28 . It can be seen from the representation according to  FIG. 7  that each cutting insert groove  28  is formed with a planar base surface  29 , which is adjoined on both sides by transition surfaces  30 ,  31  that are rounded in the circumferential direction of the cutting roller  21 . Each of the transition surfaces  30 ,  31  is continued on its side remote from the base surface  29  by again planar radial side surfaces  32 ,  33 , each extending toward the center of the circle defined by the cutting ring  21 . 
         [0031]    Formed at the ends of the radial side surfaces  32 ,  33  directed away from the transition surfaces  30 ,  31  are annular step surfaces  34 ,  35  that extend outward in the circumferential direction of the cutting roller  21 . The ends of the annular step surfaces  34 ,  35  that are disposed outward in the circumferential direction are adjoined by wedge side surfaces  36 ,  37  that extend in the radial direction all the way to the radial outer side of the cutting ring  21 . The wedge side surfaces  36 ,  37  of a cutting insert groove  28  are oriented so that they are inclined toward each other from radially inward to radially outward, such that a cutting insert  26  shaped complementarily to the cutting insert groove  28 , when inserted in the axial direction into the cutting insert groove  28 , is held in place in the radial direction of the cutting ring  21 . 
         [0032]    To secure the cutting inserts  26  in the cutting insert grooves  28  in an operationally safe manner, the cutting insert grooves  28  are lined with solder layers  38 , which ensure a secure connection after suitable heating of the cutting ring  21  in the region of the cutting insert grooves  28  and cutting inserts  26 . 
         [0033]    During operation of the cutting roller  1 , the invention particularly furnishes the advantage that the cutting inserts  26  are secured only by their outer sides extending in the circumferential direction, which are subject to relatively little wear and tear. Moreover, wear on the cutting ring  21  occurs essentially in the intermediate web portions  27 , so the cutting inserts  26  form a tooth structure and protect the intermediate web portions  27  against additional excessive wear. 
         [0034]    While this invention has been described as having a preferred design, the present invention can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims.