Tool Holder And Combination Of A Tool Holder And Tool

Patent metadata

Field	Value
Publication number	US-2016229084-A1
Application number	US-201415023717-A
Country	US
Kind code	A1
Filing date	Sep 1, 2014
Priority date	Sep 26, 2013
Publication date	Aug 11, 2016
Grant date	—

Abstract

The invention concerns a tool holder ( 40 ) for a ground-working machine, in particular a road groover with a base part ( 41 ) comprising a tool-receiving part ( 45 ), the tool-receiving part having a tool-insertion region, and the tool-receiving part merging directly or indirectly into a mounting receiver ( 47 ) for receiving a nut ( 30 ) or the like. According to the invention, in order to be able to perform simplified maintenance with a tool holder of this type, the mounting receiver has mounting surfaces ( 47.1 ) for securing the nut peripherally.

First claim

1 - 16 . (canceled)

17 . A chisel holder for a ground processing machine, the chisel holder comprising:
a base portion including:
a chisel receiver, the chisel receiver including a chisel introduction region; and
a holder receiver connected to the chisel receiver, the holder receiver configured to receive a nut and including at least one retention face, the retention face configured to secure the nut at a peripheral side of the nut.

18 . The chisel holder of claim 17 , wherein the retention faces include curved surface regions.

19 . The chisel holder of claim 18 , wherein the curved surface regions are convex and each retention face merges into an adjacent retention face via a concave transition.

20 . The chisel holder of claim 17 , wherein the holder receiver includes more than two retention faces, the retention faces arranged such that the retention faces are distributed in a substantially uniform manner over a periphery of the holder receiver.

21 . The chisel holder of claim 17 , further comprising a holder seal portion including a cylindrical bore of the chisel receiver, the holder receiver merging into the holder seal portion.

22 . The chisel holder of claim 21 , wherein the holder seal portion further includes a stop for the nut.

23 . The chisel holder of claim 17 , wherein the base portion includes a spherically concave counter-face opposite the holder receiver.

24 . The chisel holder of claim 23 , wherein the base portion further includes:
an at least partially cylindrical outer contour; and a cylindrical attachment forming at least part of the counter-face.

25 . The chisel holder of claim 23 , further comprising at least one of a peripheral projection and a peripheral recess arranged on the counter-face.

26 . The chisel holder of claim 17 , in combination with a chisel retained in the chisel receiver.

27 . The chisel holder and chisel combination of claim 26 , further comprising:
a nut received in the holder receiver and including a securing portion having at least one blocking face arranged opposite the at least one retention face of the holder receiver such that the nut is rotationally secured; and the chisel further including a chisel shaft arranged at least partially in the chisel receiver, the chisel shaft including a thread portion including a thread screwed into the nut.

28 . The chisel holder and chisel combination of claim 27 , wherein the nut further comprises a nut seal portion adjacent to the securing portion, the nut seal portion sealingly inserted into a holder seal portion of the chisel holder.

29 . The chisel holder and chisel combination of claim 27 , wherein the chisel further comprises a chisel head including a spherically curved support face tapered from the chisel head toward the chisel shaft, the support face supported by a counter-face of the chisel holder.

30 . A method of assembling a chisel in a chisel holder, the method comprising:
(a) placing a nut in a holder receiver of the chisel holder such that the nut is rotationally secured in a first position; (b) placing the chisel into a chisel receiver of the chisel holder; and (c) screwing the chisel into the nut until a support face of the chisel is tensioned on a counter-face of the chisel holder.

31 . The method of claim 30 , further comprising the step of non-releasably retaining the nut in the chisel holder with a seal before the chisel is screwed into the nut.

32 . The method of claim 30 , further comprising:
removing the nut from the first position and placing the nut in the holder receiver in a second position offset relative to the first position in a peripheral direction; and wherein a thread intake of the nut is offset corresponding to the offset positions such that the chisel may be assembled in either of the first and second positions.

Assignees

• Wirtgen Gmbh
• Betek Gmbh & Co Kg

Inventors

• Lehnert Thomas
• Buhr Karsten
• Barimani Cyrus
• Hähn Günter
• Friederichs Heiko
• Kammerer Karl
• Roth Markus

Classifications

• E21C35/19

  Means for fixing picks or holders · CPC title

• B28D1/186 Primary

  Tools therefor, e.g. having exchangeable cutter bits (B28D1/181 takes precedence; bits for picks or pick-holders for mining or quarrying E21C35/18) · CPC title

• E01C23/088 Primary

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

• E21C35/1933

  the picks having a cylindrical shank · CPC title