Bit Holder And Base Part For Receiving A Bit Holder

Patent metadata

Field	Value
Publication number	US-2016356156-A1
Application number	US-201615144512-A
Country	US
Kind code	A1
Filing date	May 2, 2016
Priority date	Dec 17, 2009
Publication date	Dec 8, 2016
Grant date	—

Abstract

The invention relates to a bit holder having an insertion projection and having a holding projection having a bit receptacle, the insertion projection comprising a bearing segment and the holding projection comprising a supporting segment. In order to allow the bit holder to be braced in permanent and stable fashion with respect to a base part, provision is made according to the present invention that the supporting segment and/or the bearing segment comprise two supporting surfaces and bearing surfaces, respectively, arranged at an angle to one another; and that the longitudinal center axis of the bit receptacle and the longitudinal axis of the insertion projection enclose an obtuse angle.

First claim

1 - 30 . (canceled)

31 . A tool apparatus, comprising:
an insertion projection having a longitudinal axis, the insertion projection including a bearing segment including at least one bearing surface; and a supporting projection defining a bit longitudinal center axis enclosing an obtuse angle with the longitudinal axis of the insertion projection, the supporting projection including a supporting segment including at least one supporting surface; wherein the longitudinal axis of the insertion projection and the bit longitudinal center axis define a transverse central plane of the tool apparatus; wherein at least one of the at least one bearing surface and the at least one supporting surface includes two surfaces located on opposite sides of the transverse central plane, the two surfaces being arranged at an angle to each other and thus non-parallel to each other; and wherein the insertion projection includes an insertion projection front side facing in a tool feed direction, and the insertion projection includes on the insertion projection front side at least one pressure surface for impingement with a screw.

32 . The apparatus according to claim 31 , wherein:
the at least one supporting surface of the supporting segment includes two supporting surfaces located on opposite sides of the transverse central plane, the two supporting surfaces being arranged at an angle to each other and thus non-parallel to each other, and the two supporting surfaces being located in front of the insertion projection in a tool feed direction.

33 . The apparatus according to claim 32 , wherein:
the at least one bearing surface faces oppositely from the tool feed direction.

34 . The apparatus according to claim 33 , wherein:
the at least one bearing surface extends parallel to the longitudinal axis of the insertion projection.

35 . The apparatus according to claim 31 , wherein:
the at least one pressure surface of the insertion projection front side is at an angle to the longitudinal axis of the insertion projection such that a force exerted against the pressure surface forces the insertion projection downward and rearward.

36 . The apparatus according to claim 31 , wherein:
the insertion projection has a free end, and the at least one supporting surface of the supporting projection faces toward the free end of the insertion projection.

37 . The apparatus according to claim 31 , wherein:
the supporting projection includes a cantilevered region that is cantilevered out beyond the insertion projection, and the at least one supporting surface is located on the cantilevered region.

38 . The apparatus according to claim 31 , wherein:
the at least one bearing surface extends in the direction of the longitudinal axis of the insertion projection from a region adjacent the supporting projection to a location beyond the at least one supporting surface of the supporting projection.

39 . The apparatus according to claim 38 , wherein:
the at least one bearing surface extends parallel to the longitudinal axis of the insertion projection.

40 . The apparatus according to claim 31 , wherein;
the at least one supporting surface and the at least one bearing surface form slide guides.

41 . The apparatus according to claim 31 , wherein:
both of the at least one bearing surface and the at least one supporting surface include two surfaces symmetrically located on opposite sides of the transverse central plane.

42 . The apparatus according to claim 31 , wherein:
an enclosed angle between the at least one supporting surface and the bit longitudinal center axis is in the range of from +20 degrees to −20 degrees.

43 . The apparatus according to claim 42 , wherein:
the enclosed angle is substantially zero so that the at least one supporting surface is substantially parallel to the longitudinal center axis of the bit receptacle.

44 . The apparatus according to claim 42 , wherein:
the obtuse angle between the bit longitudinal center axis and the longitudinal axis of the insertion projection is in a range of from 110 degrees to 160 degrees.

45 . The apparatus according to claim 31 , wherein:
the at least one supporting surface is located diametrically from the at least one bearing surface.

46 . A tool apparatus, comprising:
an insertion projection; and a supporting projection, the supporting projection protruding from the insertion projection in a tool feed direction, and the supporting projection including a rigid integral supporting segment including at least one supporting surface arranged in front of the insertion projection in the tool feed direction; and wherein the insertion projection extends from the supporting projection in an insertion direction, and the insertion projection comprises a front side facing in the tool feed direction, the front side including at least one pressure surface arranged at an angle of less than 90 degrees with respect to the insertion direction so that a pressure exerted on the pressure surface will force the insertion projection in the insertion direction and rearward.

47 . The apparatus according to claim 46 , wherein the at least one supporting surface of the supporting segment comprises two supporting surfaces that are at an angle to one another.

48 . The apparatus according to claim 47 , wherein the supporting surfaces are arranged on both sides of a transverse center plane that extends through a longitudinal center axis of the supporting projection and in the insertion direction.

49 . The apparatus according to claim 47 , wherein the supporting surfaces form a slide guide.

50 . The apparatus according to claim 46 , wherein the at least one pressure surface is arranged at an angle of less than 80 degrees with respect to the insertion direction.

51 . The apparatus according to claim 46 , wherein the insertion projection comprises an insertion projection rear side facing away from the tool feed direction, the rear side including a further supporting segment having one or more bearing surfaces.

52 . The apparatus according to claim 51 , wherein the one or more bearing surfaces include two bearing surfaces at an angle to one another.

53 . The apparatus according to claim 51 , wherein the bearing surfaces extend substantially in the insertion direction.

Assignees

• Wirtgen Gmbh

Inventors

• Lehnert Thomas
• Buhr Karsten
• Barimani Cyrus
• Hähn Günter

Classifications

• E21C35/191

  for fixing holders · CPC title

• E02F9/2866

  for rotating digging elements (for milling machines B28D1/186; for mining machines E21C35/18) · CPC title

• E21C35/193 Primary

  using bolts as main fixing elements · CPC title

• E01C23/088

  Rotary tools, e.g. milling drums {(for forming recesses to receive marking materials E01C23/0946)} · CPC title

• B28D1/188

  with exchangeable cutter bits or cutter segments · CPC title