Patent ID: 11919136
Assignee: NANJING CHERVON INDUSTRY CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A power tool, comprising:
a casing;
an output mechanism disposed at a front end of the casing;
a motor configured to provide power for the output mechanism;
a leadscrew extending along a front-and-back direction and connected to the output mechanism;
a rotation assembly connected to the motor and driven by the motor to rotate around the leadscrew;
a radial transmission assembly driven by the rotation assembly to rotate;
an axial transmission assembly separately connected to the radial transmission assembly and the leadscrew in a rotation manner and configured to drive the leadscrew to move along an axial direction of the leadscrew; and
a torque transmission portion disposed between the radial transmission assembly and the axial transmission assembly and configured to transmit torque and cause the axial transmission assembly and the radial transmission assembly to rotate synchronously,
wherein the radial transmission assembly comprises a first transmission sleeve and transmission teeth connected to the rotation assembly, the radial transmission assembly is disposed on a radially outer side of the first transmission sleeve, and the torque transmission portion comprises a first torque transmission portion disposed between the first transmission sleeve and the axial transmission assembly and configured to cause the first transmission sleeve and the axial transmission assembly to rotate synchronously, wherein the first torque transmission portion comprises several first non-circular portions disposed on an inner circumference of the first transmission sleeve and several second non-circular portions disposed on an outer circumference of the axial transmission assembly and the several second non-circular portions fit with the several first non-circular portions,
wherein the axial transmission assembly comprises a ball rack and balls, the ball rack is connected to the first transmission sleeve in the transmission manner and sleeved on an outer circumference of the leadscrew, and a rack wall of the ball rack is provided with through holes through which the balls are allowed to pass, and
wherein the radial transmission assembly further comprises a second transmission sleeve, the second transmission sleeve is sleeved on an outer circumference of the ball rack and provided with retention grooves on an inner circumferential wall of the second transmission sleeve, and the balls are allowed to enter the retention grooves.