US 12,440,953 B2
Hand-held power tool with an impact mechanism assembly
Willy Braun, Neustetten (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Mar. 15, 2024, as Appl. No. 18/606,832.
Claims priority of application No. 10 2023 202 866.2 (DE), filed on Mar. 29, 2023.
Prior Publication US 2024/0326213 A1, Oct. 3, 2024
Int. Cl. B25D 11/06 (2006.01); B25D 17/24 (2006.01)
CPC B25D 11/06 (2013.01) [B25D 17/24 (2013.01); B25D 2217/0092 (2013.01); B25D 2250/331 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hand-held power tool, comprising:
an impact mechanism assembly that includes an electric motor;
an eccentric assembly; and
an impact pin configured to oscillate linearly along an impact mechanism axis,
wherein the eccentric assembly includes (i) an eccentric wheel mounted in an impact mechanism carrier of the impact mechanism assembly and configured to rotate about an eccentric axis, and (ii) a connecting rod driven by the eccentric wheel and operably coupled to said impact pin to oscillate said pin,
wherein the electric motor has a motor shaft along a motor axis, which is configured to drive the impact pin by way of the eccentric wheel and the connecting rod,
wherein the eccentric wheel has an eccentric hub formed on one side, which is mounted along the eccentric axis on a side of the eccentric wheel facing away from the connecting rod proximally with a floating bearing and distally with a fixed bearing in the impact mechanism carrier,
wherein the fixed bearing has an inner ring and an outer ring, in which the inner ring is connected to the eccentric hub of the eccentric wheel without play via an interference fit, and the outer ring is held in a second sliding seat of the impact mechanism carrier, and
wherein the outer ring of the fixed bearing is fixed along the eccentric axis in a direction facing the eccentric wheel via a hollow cylindrical spacer sleeve, which is axially supported on the one hand via the outer ring of the fixed bearing and on the other hand via the outer ring of the floating bearing.