US 12,318,903 B2
Power tool and hammer drill
Yang Li, Nanjing (CN)
Assigned to Nanjing Chervon Industry Co., Ltd., Nanjing (CN)
Filed by Nanjing Chervon Industry Co., Ltd., Nanjing (CN)
Filed on Nov. 11, 2022, as Appl. No. 17/985,512.
Claims priority of application No. 202111559700.0 (CN), filed on Dec. 20, 2021.
Prior Publication US 2023/0191576 A1, Jun. 22, 2023
Int. Cl. B25D 11/06 (2006.01); B25D 17/06 (2006.01)
CPC B25D 11/06 (2013.01) [B25D 17/06 (2013.01)] 18 Claims
OG exemplary drawing
 
14. A hammer drill configured to perform a tool operation through a tip functional element, wherein the tip functional element is mounted to the hammer drill in a mounting direction, the hammer drill comprising:
a motor;
an impact mechanism comprising an impact power piece for generating impact power and an impact block capable of reciprocating, wherein a gas space is provided between a rear end of the impact block and the impact power piece; and
a drive mechanism capable of driving the impact mechanism,
wherein a length of the gas space in the mounting direction is less than or equal to 13 mm when the impact block is at an impact position, and
wherein an impact frequency of the impact mechanism is greater than or equal to 4500 BPM.