US 12,311,518 B2
Impact drill
Wei Lu, Nanjing (CN); and Changwei Zuo, Nanjing (CN)
Assigned to Nanjing Chervon Industry Co., Ltd., Nanjing (CN)
Filed by Nanjing Chervon Industry Co., Ltd., Nanjing (CN)
Filed on Jun. 22, 2022, as Appl. No. 17/846,495.
Claims priority of application No. 202110760686.4 (CN), filed on Jul. 6, 2021.
Prior Publication US 2023/0009570 A1, Jan. 12, 2023
Int. Cl. B25D 16/00 (2006.01); B25F 5/00 (2006.01); B25B 21/02 (2006.01); B25B 23/147 (2006.01); B25D 11/10 (2006.01)
CPC B25D 16/006 (2013.01) [B25F 5/001 (2013.01); B25B 21/02 (2013.01); B25B 23/147 (2013.01); B25D 11/106 (2013.01); B25D 16/00 (2013.01); B25D 2216/0023 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An impact drill, comprising:
a motor;
a housing assembly configured to support the motor;
an output shaft capable of being driven by the motor to rotate around a first axis;
a transmission assembly comprising a locking ring rotatable relative to the housing assembly;
a lock pin connected to the locking ring and configured to limit rotation of the locking ring;
a biasing element configured to bias the lock pin such that the lock pin applies a locking force to stop the rotation of the locking ring;
a function conversion member rotatably mounted about the first axis, the function conversion member comprising a stop portion configured to stop movement of the lock pin along an axis parallel to the first axis and a release portion configured to allow the movement of the lock pin along the axis parallel to the first axis, the function conversion member forms an opening for the lock pin and the transmission assembly to pass through, the stop portion protrudes toward a center of the opening relative to the release portion, and the function conversion member can rotate relative to the housing assembly around the first axis so that the stop portion and the release portion are separately aligned or staggered with the lock pin along an axial direction of the first axis; and
an operation member configured to drive the function conversion member to switch a stop state of the movement of the lock pin along the axial direction of the first axis,
wherein the function conversion member and the operation member are mated with a groove and boss to form a stop structure to stop a movement of the function conversion member along the first axis,
wherein the operation member drives the function conversion member to rotate solely around the first axis to selectively stop movement of the lock pin or allow movement of the lock pin along the first axis, and
the locking ring includes locking teeth for abutting the lock pin.