Classifications

• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
  • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
  • E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements

Definitions

• the invention relates to a trailing tooth for cutting wheels, such as paddle wheels, underwater cutting wheels or the like, which is provided pivotably in the area of a plurality of blades which are arranged distributed around the circumference of the cutting wheel and are provided with cutting teeth in the material receiving area.
• a bucket with crushing tools in particular for bucket wheel excavators, is known.
• the respective crushing chisel is articulated to the shovel, the crushing chisel being inserted in a holder which is pivotally mounted in a support arm.
• the support arm is attached directly to the blade with one of its ends, whereas the other end is connected to the blade by means of two connectors.
• the support arm consists of a profile with transverse plates with holes for connecting bolts and a clamp arranged on the outwardly projecting end of the profile.
• the holder is formed from two flat profiles connected by means of flat cross bars.
• the invention has for its object, starting from DE-OS 3834787 on the one hand this St.d.T. to further develop and, on the other hand, to create a possibility of cutting very hard and brittle material in small pieces and economically, the trailing tooth being able to be produced as a large-scale part with the least possible manufacturing outlay.
• the features according to the invention create a possibility of shifting the pivotability of the trailing tooth directly into the area of the blade back, it being possible to dispense with further holding elements connected to the blade back.
• the trailing tooth according to the invention pre-cuts the next depth of cut and thus makes it easier for the blade teeth to loosen this layer for filling the blades.
• very finely divided material is obtained, which can be easily placed on a conveyor belt without further intermediate comminution devices.
• the trailing tooth is preferably arranged on the back of the blade in such a way that the lip wear on each blade which is inevitably established due to the inclined arrangement of the blade wheel (opencast mining device) is largely avoided.
• an arrangement of the trailing tooth is provided off-center on the respective blade back. The specific arrangement depends on the material to be machined.
• the trailing tooth itself can be produced as a one-piece casting, so that with an appropriate series run, an alternative that is significantly cheaper than the St.dT can be achieved.
• Preferred applications in opencast mining are seen for the machining of hard and brittle materials, such as lime.
• FIG. 1 - schematic diagram of a paddle wheel usable for opencast mining with hinged blades and trailing teeth
• FIG. 2 - partial view of a blade according to Figure 1 with the trailing tooth according to the invention in an enlarged view
• FIG. 1 shows a schematic representation of a paddle wheel 1, which can be used for open-cast mining, in particular is suitable for loosening and picking up rock containing chalk and quartz.
• Each of the blades 2 is provided with a material receiving opening 3, around which only indicated incisors 4 are provided.
• the pivot axis 8 of each trailing tooth 6 runs in the direction of the resulting cutting speed of the paddle wheel 1.
• the respective trailing tooth 6 is articulated directly on the back of the blade 5 in the area 9 below the cutting teeth 4 without further holding and guiding elements.
• Figures 2 and 3 show on the one hand an enlarged view of one of the blades 2 in the side view ( Figure 2) and on the other hand in the top view ( Figure 3).
• the cutting teeth 4 and the trailing tooth 6 can be seen.
• the receiving area 10 for the cutting teeth 4 is in the direction of the blade back £? extends and serves to support the area 11 of the trailing tooth 6.
• the trailing tooth 6 is displaced outside the center of the blade 12 (longitudinal axis 12 ') on the blade back 5 13.
• the attachment 14 is fixed by means of a disk 16 welded to it, in such a way that there is as little mobility as possible in the direction of the pivot axis 8 and at the same time the pivoting movement about the pivot axis 8 can be implemented without problems.
• the trailing tooth 6 has in its articulation area 13 a thickened profile which tapers towards the cutting edge 7, the cross section of the trailing tooth 6 being approximately rectangular to acute-angled.
• each trailing tooth 6 cuts through its special off-center arrangement (longitudinal axis 12 ') on the back of the blade 5 to the next depth of cut and thus makes it easier for the cutting teeth 4 to loosen the previously cracked layer for filling the blades 2.
• the fastening elements 17 are still attached to the respective extension 10 Inclusion of the chain mail 5 forming the blade back 5 and only indicated here is provided.

Landscapes

• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Component Parts Of Construction Machinery (AREA)
• Shovels (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6395364

Family Applications (1)

Country Status (5)

Citations (2)

Family Cites Families (2)

• 1989
  • 1989-12-13 DE DE3941123A patent/DE3941123A1/de active Granted
• 1990
  • 1990-08-09 AU AU61495/90A patent/AU633615B2/en not_active Ceased
  • 1990-08-09 WO PCT/EP1990/001306 patent/WO1991009181A1/de active Application Filing
  • 1990-08-09 CA CA002072119A patent/CA2072119A1/en not_active Abandoned
  • 1990-08-27 ZA ZA906798A patent/ZA906798B/xx unknown

Patent Citations (2)

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