Impact mechanism arrangement
AssigneeHilti Aktiengesellschaft
InventorsJosef Fünfer, Ulrich Mandel
Life of this patent
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Abstract
Hammer drill and/or chipping hammer (100) having a drive motor (70), an impact mechanism (10) and a tool fitting (50) for fitting a tool (110), wherein the impact mechanism (10) has an anvil (30) that is axially displaceable in an anvil guide (20) and acts on the tool (110), wherein the impact mechanism (10) has an idle-strike damper element (11), which acts between the anvil (30) and the tool fitting (50), and wherein the impact mechanism has a guide housing (80), which engages at least partially around the anvil (30) and/or the tool fitting (50), wherein an additional idle-strike damper element (31) is provided, which acts between the tool fitting (50) and the guide housing (80).
Claims20
A hammer drill or chipping hammer comprising:
- a drive motor;
- an impact mechanism;
- and
- a tool fitting for fitting a tool, wherein the impact mechanism has an anvil axially displaceable in an anvil guide and acting on the tool, wherein the impact mechanism has an idle-strike damper element acting between the anvil and the tool fitting and the impact mechanism has a guide housing engaging at least partially around the anvil or the tool fitting;
- an additional idle-strike damper element acting between the tool fitting and the guide housing;
- wherein the anvil is assigned a contact piece arranged so as to make contact with an idle-strike stop surface on one side and to make contact with a rebound-strike stop surface on an other side;
- and
- wherein the contact piece is formed separately from the anvil and is clamped in place resiliently in an axial direction between the idle-strike damper element and a rebound-strike damper element.
A hammer drill or chipping hammer comprising:
- a drive motor;
- an impact mechanism;
- and
- a tool fitting for fitting a tool, wherein the impact mechanism has an anvil axially displaceable in an anvil guide and acting on the tool, wherein the impact mechanism has an idle-strike damper element acting between the anvil and the tool fitting and the impact mechanism has a guide housing engaging at least partially around the anvil or the tool fitting;
- an additional idle-strike damper element acting between the tool fitting and the guide housing;
- wherein the anvil is assigned a contact piece arranged so as to make contact with an idle-strike stop surface on one side and to make contact with a rebound-strike stop surface on an other side;
- wherein the idle-strike stop surface is formed on an idle-strike stop ring comprised by the tool fitting or the rebound-strike stop surface is formed on a rebound-strike stop ring comprised by the tool fitting;
- wherein the impact mechanism has an idle-strike wedge ring and a rebound-strike wedge ring, wherein the idle-strike wedge ring is arranged between a first bearing of the anvil guide and the idle-strike damper element and the rebound-strike wedge ring is arranged between a second bearing of the anvil guide and a rebound-strike damper element.
Dependencies are inferred from the claim text.