Power tool and electric pipe cutter

Patent metadata

Field	Value
Publication number	US-2023051358-A1
Application number	US-202217878977-A
Country	US
Kind code	A1
Filing date	Aug 2, 2022
Priority date	Aug 10, 2021
Publication date	Feb 16, 2023
Grant date	—

Abstract

A power tool includes a casing, a cutting unit, a transmission device, and a toggle switch. The casing includes a support portion. The cutting unit is used for cutting a target object and moving between a first position and a second position relative to the support portion. The toggle switch includes at least a third position and a fourth position. When the toggle switch is at the third position, the cutting unit performs a first motion: the cutting unit moves from the second position to the first position. When the toggle switch is at the fourth position, the cutting unit performs a second motion: the cutting unit moves from the first position to the second position. A speed at which the cutting unit performs the second motion is greater than a speed at which the cutting unit performs the first motion.

First claim

What is claimed is:

1 . A power tool, comprising:
a casing comprising a support portion; a cutting unit for cutting a target object; a driving device for driving the cutting unit to move between a first position and a second position relative to the support portion; a transmission device for connecting the driving device to the cutting unit; and a toggle switch comprising at least a third position and a fourth position; wherein, when the toggle switch is placed into the third position, the cutting unit performs a first motion under the action of the driving device and the cutting unit moves from the second position to the first position, when the toggle switch is placed into the fourth position, the cutting unit performs a second motion under the action of the driving device and the cutting unit moves from the first position to the second position, and a speed at which the cutting unit performs the second motion is greater than a speed at which the cutting unit performs the first motion.

2 . The power tool of claim 1 , wherein the transmission device comprises an output shaft connected to the driving device, an output gear connected to the cutting unit, and a deceleration assembly connecting the output gear to the output shaft.

3 . The power tool of claim 2 , wherein a reduction ratio of the deceleration assembly when the toggle switch is at the fourth position is smaller than a reduction ratio of the deceleration assembly when the toggle switch is at the third position.

4 . The power tool of claim 2 , wherein the deceleration assembly has a reduction ratio that is non-zero when the toggle switch is at the third position and the deceleration assembly has no reduction ratio when the toggle switch is at the fourth position.

5 . The power tool of claim 1 , wherein the driving device comprises an electric motor, the cutting unit is driven to move from the second position to the first position when the electric motor rotates forward, and the cutting unit is driven to move from the first position to the second position when the electric motor reverses.

6 . The power tool of claim 5 , wherein the power tool further comprises a main switch for controlling the electric motor and the electric motor rotates forward when the main switch is operated.

7 . The power tool of claim 6 , wherein the electric motor reverses when the main switch is not operated and the toggle switch is operated.

8 . The power tool of claim 1 , further comprising a steering controller configured to switch the driving device between forward rotation and reverse rotation according to a state of the power tool or an operation of a user so that the cutting unit performs the first motion or the second motion.

9 . The power tool of claim 1 , wherein the driving device comprises an electric motor configured to drive the cutting unit perform the second motion.

10 . The power tool of claim 1 , wherein the driving device comprises an electric motor, the power tool further comprises a battery pack for powering the electric motor, the electric motor is disposed in the casing, and the battery pack is disposed at a rear end of the casing and disposed at a lower side of the electric motor.

11 . The power tool of claim 10 , wherein the casing comprises a tool portion for supporting the cutting unit and a lower end surface of the tool portion is higher than a lower end surface of the battery pack in a up and down direction.

12 . An electric pipe cutter, comprising:
a casing comprising a support portion; a cutting unit for cutting a target object; a driving device for driving the cutting unit to move between a first position and a second position relative to the support portion; and a transmission device for connecting the driving device to the cutting unit; wherein the cutting unit is driven to perform a first motion in which the cutting unit moves from the second position to the first position and a second motion in which the cutting unit moves from the first position to the second position.

14 . An electric pipe cutter, comprising:
an electric motor; a casing comprising a support portion; a cutting unit for cutting a target object and moving between a first position and a second position relative to the support portion of the casing under an action of the electric motor; a main switch, wherein the main switch outputs a main switch state signal through a state of the main switch, controls the electric motor to perform forward rotation, and drives the cutting unit to perform a first motion in which the cutting unit moves from the second position to the first position; and a toggle switch, wherein the toggle switch outputs a toggle switch state signal through a state of the toggle switch, controls the electric motor to perform reverse rotation, and drives the cutting unit to perform a second motion in which the cutting unit moves from the first position to the second position.

15 . The electric pipe cutter of claim 14 , further comprising:
a controller; and a detection element for detecting a position of the cutting unit and outputting a detection signal to the controller; wherein the controller determines or calculates input signals to control a rotation state of the electric motor and the input signals comprise at least the main switch state signal, the toggle switch state signal, and the detection signal.

16 . The electric pipe cutter of claim 15 , wherein different combinations of the input signals correspond to different special working conditions of the electric pipe cutter.

17 . The electric pipe cutter of claim 16 , wherein the special working conditions comprise at least a shutdown working condition, a braking working condition, or a speed regulation working condition.

18 . The electric pipe cutter of claim 14 , wherein a speed at which the cutting unit performs the second motion is greater than a speed at which the cutting unit performs the first motion.

19 . The electric pipe cutter of claim 18 , further comprising a transmission device connecting the cutting unit to the electric motor, wherein the transmission device comprises an output shaft connected to the electric motor, an output gear connected to the cutting unit, and a deceleration assembly connected to the output gear to the output shaft.

20 . The electric pipe cutter of claim 14 , further comprising a battery pack for powering the electric motor, wherein the electric motor is disposed in the casing, and the battery pack is disposed at a rear end of the casing and disposed at a lower side of the electric motor.

Assignees

• Nanjing Chervon Ind Co Ltd

Inventors

• Tao Shichun
• Liu lai
• Ni Lianghua
• Fan Baofeng

Classifications

• B25F5/02 Primary

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title

• B23D29/00

  Hand-held metal-shearing or metal-cutting devices (with nibbling action B23D27/02; hand-operated devices for metal-cutting otherwise than by shearing B26B) · CPC title

• B23D21/00 Primary

  Machines or devices for shearing or cutting tubes (as additional equipment for deep-drawing presses B21D24/16) · CPC title

• B23D17/02

  characterised by drives or gearings therefor · CPC title

• B23D33/00

  Accessories for shearing machines or shearing devices (feeding stock to machines or removing stock B21D43/00) · CPC title