公开(公告)号：US12151351B2

公开(公告)日：2024-11-26

申请号：US18009522

申请日：2021-06-15

Applicant: Hilti Aktiengesellschaft

Inventor： Ernst-Rudolf Lübkert ,  Uto Plank ,  Karin Groth

IPC: B25D11/12 ,  B25D17/06

Abstract: An electropneumatic impact mechanism for an electric hand-held power tool, in particular a hammer drill and/or chipping hammer, wherein the impact mechanism has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in the axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing on the other side, wherein the impact mechanism has a bearing body on which the eccentric wheel is mounted rotatably by means of a pair of plain bearings.

公开(公告)号：US12257683B2

公开(公告)日：2025-03-25

申请号：US17914943

申请日：2021-03-25

Applicant: Hilti Aktiengesellschaft

Inventor： Ernst-Rudolf Lübkert ,  Karin Groth ,  Uto Plank ,  Manuel Rosenzweig ,  Andres Wellmann Jelic

IPC: B25D11/12 ,  B25D17/06

Abstract: An electric hand-held power tool, in particular a hammer drill and/or chipping hammer, having an electropneumatic impact mechanism which has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in an axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing via an end plate of the transmission housing on the other side, wherein the transmission housing is subdivided at least into a main shell and a cover shell separate from the main shell, such that the guide tube is braced against the main shell at least partially by the cover shell.

公开(公告)号：US12220801B2

公开(公告)日：2025-02-11

申请号：US17768381

申请日：2020-11-02

Applicant: Hilti Aktiengesellschaft

Inventor： Uto Plank ,  Ulrich Mandel ,  Josef Fünfer

IPC: B25D17/06

Abstract: Hammer drill and/or chipping hammer having a drive motor, an impact mechanism and a tool fitting for fitting a tool, wherein the impact mechanism has an anvil that is axially displaceable in an anvil guide and acts on the tool, wherein the impact mechanism has an idle-strike damper element and a rebound-strike damper element, which are formed in one piece with one another and as such form a combined damper element, wherein the anvil guide is arranged outside, preferably only outside the combined damper element.