Edge treatment apparatus with reciprocating treatment surfaces

Abstract

An apparatus for the treatment of cutting edges includes a first and second tools each having treatment surfaces. The treatment surfaces are arranged to define a V-shaped groove for receiving a cutting tool to be sharpened. The tools are driven by a main shaft and are connected to the main shaft via eccentric bodies rotationally fixed on the main shaft, connecting rods attached to the eccentric bodies, and auxiliary shafts connecting the connecting rods to the first and second tools. A power unit is configured to rotate the main shaft, wherein rotation of the main shaft causes the first and second tools to reciprocate up and down relative to the main shaft.

1 . An apparatus for the treatment of cutting edges comprising:
 a first tool supporting a first set of treatment surfaces each having an axial length (L), in the apparatus oriented at crosswise relation to a second set of corresponding treatment surfaces supported in an oppositely arranged second tool, such that the treatment surfaces form in combination sides of a V-shaped groove with an opening angle determined by an intermediate angle between the first and second sets of treatment surfaces; wherein   connecting rods of the first and second tools are individually connected to a main shaft that is driven in rotation by a power unit, wherein one end of the connecting rod is pivotally connected to the associated tool and the opposite end of the connecting rod is pivotally connected to the main shaft via an eccentric that is rotationally journaled in the opposite end of the connecting rod, the eccentric being a cylindrical body through which the main shaft passes non-rotationally at an eccentric position between a centre and a periphery of the eccentric, such that in a set of first and second tools the appurtenant eccentrics are mutually rotated and angularly displaced on the main shaft, and wherein each tool and associated connecting rod are indirectly connected by an auxiliary shaft that runs in parallel with the main shaft, wherein the connecting rod is pivotally journaled on the auxiliary shaft and the tool is journaled on the auxiliary shaft for sliding movement in a length direction of the auxiliary shaft.   
     
     
         2 . The apparatus of  claim 1 , wherein an angular displacement between the eccentric of the first tool and the eccentric of the second tool in a set of tools is in the range of 90°-270°. 
     
     
         3 . The apparatus of  claim 1 , wherein the auxiliary shaft in one end carries a head that is movable in a gap formed between oppositely positioned abutments, one of which includes an upwardly open recess for passage of the auxiliary shaft, the abutments are configured to restrain the auxiliary shaft in axial directions while providing the auxiliary shaft mobility in transverse directions, transversely to the axial length of the auxiliary shaft. 
     
     
         4 . The apparatus of  claim 1 , wherein the tools are in opposite sides journaled on linear guides arranged at inclinations that are parallel with the length directions of the associated sets of treatment surfaces. 
     
     
         5 . The apparatus of  claim 4 , wherein the each of the guides includes a guide rod that is slidably received and axially movable inside a guide tube, wherein each tool includes a corresponding set of guide rod and guide tube arranged on opposite sides of the tool. 
     
     
         6 . The apparatus of  claim 1 , wherein each tool has a set of at least two treatment surfaces arranged side by side in a row. 
     
     
         7 . The apparatus of  claim 1 , further comprising two or more sets of first and second tools arranged in succession on a common main shaft, wherein one tool of each set of tools is lifted while another tool of each set of tools is lowered and vice versa, by rotation of the main shaft. 
     
     
         8 . The apparatus of  claim 1 , further comprising an electrical power unit. 
     
     
         9 . The apparatus of  claim 8 , further comprising a battery electrically connected to the power unit. 
     
     
         10 . The apparatus of  claim 2 , wherein the angular displacement between the eccentric of the first tool and the eccentric of the second tool is 180°. 
     
     
         11 . An apparatus for the treatment of cutting edges comprising:
 a first tool including at least two first treatment surfaces;   a second tool, opposite the first tool, including at least two second treatment surfaces interleaved with the first treatment surfaces such the first and second treatment surfaces cooperate to define a V-shaped groove for receiving a cutting tool to be sharpened;   a main shaft supported for rotation;   first and second eccentric bodies rotationally fixed on the main shaft and longitudinally spaced from each other, wherein each of the eccentric bodies are associated with one of the tools, and the first and second eccentric bodies are angularly displaced relative to each other;   a first auxiliary shaft slidably connected to the first tool and arranged parallel to the main shaft at a location that is radially offset from the main shaft;   a second auxiliary shaft slidably connected to the second tool and arranged parallel to the main shaft at a location that is radially offset from the main shaft;   a first connecting rod having a first end connected to the first eccentric body and a second end connected to the first auxiliary shaft;   a second connecting rod having a first end connected to the second eccentric body and a second end connected to the second auxiliary shaft; and   a power unit configured to rotate the main shaft, wherein rotation of the main shaft causes the first and second tools to reciprocate up and down relative to the main shaft.