Power tool and operating method for use on the power tool

Patent metadata

Field	Value
Publication number	US-9833884-B2
Application number	US-201414330368-A
Country	US
Kind code	B2
Filing date	Jul 14, 2014
Priority date	Jan 13, 2012
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A power tool, comprising: a housing; a motor being disposed in the housing for outputting rotary power; an output shaft having an accommodating hole in the axial direction for holding a tool bit; a transmission mechanism, being disposed between the motor and the output shaft for transmitting rotary power from the motor to the output shaft; a tool bit supporting being disposed in the housing and including several chambers disposed in parallel for holding the tool bit; a connecting member being disposed in the housing and capable of moving axially between a working position where the connecting member passes through one of the chambers and to accommodate the tool bit in the chamber connect the output shaft, and a release position where the connecting member exits and separates from one of the several chambers; and an operating member is arranged on the housing for controlling the axial movement of the connecting member; the power tool further includes an automatic shifting means for adjusting the position of the tool bit supporting in response to the movement of the operating member, wherein the connecting member moves axially to a position that is separated from one of the several chambers, and the cartridge moves to a position where another chamber is axially corresponding to the output shaft under the action of the automatic shifting means.

First claim

The invention claimed is:

1. A power tool, comprising:
a housing;
a motor being disposed in the housing for outputting rotary power;
an output shaft having an accommodating hole for holding a tool bit, a longitudinal axis of the accommodating hole extending in an axial direction of the output shaft;
a transmission mechanism being disposed between the motor and the output shaft for transmitting rotary power from the motor to the output shaft;
a tool bit supporting assembly being disposed in the housing for holding at least two tool bits;
a connecting member being disposed in the housing and movable between a working position where torque transmission from the motor to one of the at least two tool bits, which one tool bit is held by the accommodating hole, is enabled and a release position where torque transmission from the motor to any of the at least two tool bits is disenabled; and
an operating member is arranged on the housing for controlling movement of the connecting member;
wherein the power tool further includes an automatic shifting means for adjusting a position of the tool bit supporting assembly in response to movement of the operating member, and wherein the tool bit supporting assembly enables one of the at least two tool bits, which one tool bit is held by the tool bit supporting assembly, to move from one position to another under action of the automatic shifting means.

2. The power tool according to claim 1 , wherein the automatic shifting means includes a control assembly arranged between the operating member and the tool bit supporting assembly, the control assembly is movable from an initial position to a terminal position and drives the tool bit supporting assembly.

3. The power tool according to claim 2 , wherein the control assembly is connected with the operating member, the operating member controls movement of the connecting member until the connecting member is at least partially overlapped with a chamber, and the control assembly moves from the terminal position to the initial position.

4. The power tool according to claim 2 , wherein the control assembly is connected with the operating member, and the operating member is operable to drive movement of the control assembly.

5. The power tool according to claim 2 , wherein the tool bit supporting assembly is rotatably supported in the housing and the control assembly is rotatable around an axis parallel to the longitudinal axis of the output shaft.

6. The power tool according to claim 2 , wherein the automatic shifting means further includes a movement conversion assembly being connected with the operating member, and wherein the control assembly is driven to move by the operating member via the movement conversion assembly.

7. The power tool according to claim 6 , wherein the movement conversion assembly includes a swing plate being connected between the operating member and the control assembly, and the operating member linearly moves along a movement direction to drive the swing plate swinging around a central rotating line perpendicular to the movement direction of the operating member, and a sliding groove is arranged on the operating member, a sliding pin capable of moving in the sliding groove is provided on one end of the swing plate, and the other end of the swing plate is connected with the control assembly.

8. The power tool according to claim 2 , wherein at least two locating grooves corresponding to at least two chambers are arranged on an end face of the tool bit supporting assembly, the control assembly includes a pawl engaging with one of the locating grooves, and the pawl is movable between a position engaging with one of the locating grooves and a position separating from the one locating groove.

9. An operating method for the power tool according to claim 1 , comprising the following steps:
controlling the operating member to drive the connecting member to move to the release position, and then controlling the operating member to drive the automatic shifting means to make the tool bit supporting assembly move such that the one of the at least two tool bits, which one tool bit is held by the tool bit supporting assembly, moves from one position to another.

10. The operating method according to claim 9 ,
wherein the tool bit supporting assembly includes at least two chambers each having a respective longitudinal axis being disposed in parallel to one another for correspondingly holding a respective one of the at least two tool bits, the connecting member passes through one of the at least two chambers when the connecting member is at the working position, and
wherein to accommodate one of the tool bits in the chamber, the connecting member exits and separates from the one of the at least two chambers when the connecting member is at the release position,
wherein the automatic shifting means includes a control assembly arranged between the operating member and the tool bit supporting assembly, the control assembly is movable from an initial position to a terminal position and drives the tool bit supporting assembly,
the operating member controls movement of the connecting member until the connecting member is at least partially overlapped with the one chamber, and
the control assembly moves from the terminal position to the initial position,
wherein the operating method further comprises:
controlling the operating member to drive the connecting member to return to the working position and the control assembly to return to the initial position.

11. The power tool according to claim 1 , wherein the connecting member is movable along the axial direction of the output shaft between the working position and the release position.

12. The power tool according to claim 1 , wherein the tool bit supporting assembly includes at least two chambers each having a respective longitudinal axis disposed in parallel to one another, each of the at least two chambers for correspondingly holding a respective one of the at least two tool bits, the connecting member passes through one of the at least two chambers when the connecting member is at the working position, and wherein to accommodate one of the tool bits in the one chamber, the connecting member exits and separates from the one of the at least two chambers when the connecting member is at the release position.

13. The power tool according to claim 12 , wherein the connecting member moves so as to be separated from the one of the at least two chambers, the operating member drives the automatic shifting means in order to move the tool bit supporting assembly to a position such that another one of the chambers has the respective longitudinal axis thereof in alignment with the longitudinal axis of the output shaft, so that positions of the at least two tool bits have been changed.

14. The power tool according to claim 1 , wherein the operating member is movable along the axial direction of the output shaft to drive the connecting member and the automatic shifting means.

15. The power tool according to claim 1 , wherein the automatic shifting means is connected between the operating member and the tool bit supporting assembly.

16. The power tool according to claim 1 , wherein the automatic shifting means includes a movement conversion assembly being connected between the operating member and the tool bit supporting assembly, and the movement conversion assembly is used to convert the movement of the operating member to the movement of the tool bit supporting assembly.

17. The power tool according to claim 16 , wherein the movement conversion assembl

Assignees

• Positec Power Tools Suzhou Co Ltd
• Positec Power Tools Suzhou Co Ltd

Inventors

• Andriolo Paolo
• Zhang Shisong
• Zhong Hongfeng
• Pang Xiaoli
• Xu Jingtao
• Xie Mingjian
• Ma Yichun
• Zhang Wei
• Wang Qinglin

Classifications

• B23Q2003/1553

  by rectilinear projection · CPC title

• B25F1/04

  wherein the elements are brought into working positions by a pivoting or sliding movement · CPC title

• Y10T483/1798

  including means to project tool from matrix · CPC title

• Y10T483/1748

  Tool changer between spindle and matrix · CPC title

• Y10T483/10

  Process · CPC title