Power tool

• US 10,639,758 B2
• Filed: 11/22/2017
• Issued: 05/05/2020
• Est. Priority Date: 11/25/2016
• Status: Active Grant

• Current Assignee: Nanjing Chervon Industry Company Limited (Chervon Holdings Limited)
• Original Assignee: Nanjing Chervon Industry Company Limited (Chervon Holdings Limited)
• Inventors: Le, Jun, Li, Yongtao
• Primary Examiner(s): Lopez, Michelle
• Application Number:
  US15/820,533
• Publication Number:
  US 20180147681A1
• Time in Patent Office: 895 Days
• Field of Search: 173198
• CPC Class Codes: B23Q 11/0046 by sucking
• CPC Class Codes: B23Q 11/0071 dust collectors for hand tools
• CPC Class Codes: B25D 16/00 Portable percussive machines with superimposed rotation , the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit combined percussion and rotary drilling adapted for earth drilling E21B6/00
• CPC Class Codes: B25D 17/043 Handles resiliently mounted relative to the hammer housing B25D17/046 takes precedence
• CPC Class Codes: B25D 17/20 Devices for cleaning or cooling tool or work
• CPC Class Codes: B25D 2211/061 Swash-plate actuated impulse-driving mechanisms
• CPC Class Codes: B25D 2217/0057 Details related to cleaning or cooling the tool or workpiece
• CPC Class Codes: B25D 2250/121 Housing details
• CPC Class Codes: B25F 5/003 Stops for limiting depth in rotary hand tools for drilling tools: B23B49/003
• CPC Class Codes: B25F 5/026 in the form of an auxiliary handle B25F5/024 takes precedence
• CPC Class Codes: B28D 7/02 for removing or laying dust, e.g. by spraying liquids; for cooling work

Abstract

A power tool includes a tool main body including a first motor for outputting power to a tool attachment and a dust collecting device. The dust collecting device includes a fan, a second motor for driving the fan to rotate so as to generate absorbing force, a connecting assembly for connecting the dust collecting device with the tool main body detachably, a dust collecting housing connected movably with the connecting assembly in a front and rear direction. The second motor includes a stator and a rotor being capable of rotating relative to the stator about a first axis substantially perpendicular to the front and rear direction. The dust collecting housing is formed with a first containing chamber for containing the fan and a second containing chamber for containing dust absorbed by the dust collecting device.

Claims

1. A power tool, comprising:

a tool main body comprising a first motor for outputting power to a tool attachment; and

a dust collecting device comprising;

a fan;

a second motor for driving the fan to rotate so as to generate an absorbing force;

a connecting assembly for detachably connecting the dust collecting device with the tool main body; and

a dust collecting housing connected movably with the connecting assembly in a front and rear direction;

wherein the second motor comprises;

a stator; and

a rotor being capable of rotating relative to the stator about a first axis substantially perpendicular to the front and rear direction; and

wherein the dust collecting housing comprises;

a main housing forming a first containing chamber for containing the fan; and

a dust box detachably couplable to the main housing and forming a second containing chamber for containing dust absorbed by the dust collecting device, and

wherein the second motor and the dust box are disposed on opposite sides of the fan in a direction of the first axis.

2. The power tool of claim 1, wherein the dust collecting housing is further formed with a dust collecting opening communicated with the second containing chamber and the second motor is disposed between the first motor and the dust collecting opening.

3. The power tool of claim 1, wherein the dust collecting housing is further formed with a third containing chamber for containing the second motor and the second containing chamber and the third containing chamber are disposed on two sides of the fan respectively.

4. The power tool of claim 1, wherein the dust collecting device further comprises a filter box disposed detachably in the second containing chamber and a safety switch being capable of stopping the second motor from being activated by a user when the filter box isn'"'"'t set in the second containing chamber.

5. The power tool of claim 1, wherein the dust collecting device further comprises a battery for supplying power to the second motor and the dust collecting housing is formed with a forth containing chamber for containing the battery.

6. The power tool of claim 1, wherein the tool main body comprises a tool housing comprising a main handle for a user to grip so as to operate the tool main body and an auxiliary handle comprising a clamping portion for clamping on the tool housing wherein the auxiliary handle is detachably connected with the connecting assembly.

7. A power tool, comprising:

a tool main body comprising a first motor for outputting power to a tool attachment;

an auxiliary handle detachably connected with the tool main body; and

a dust collecting device comprising a fan and a second motor for driving the fan to rotate;

wherein the dust collecting device comprises;

a dust collecting housing for containing the fan;

a dust box detachably couplable to the dust collecting housing;

a guiding rod for guiding the dust collecting housing to move relative to the tool main body in a front and rear direction; and

a connecting element for connecting the dust collecting device to the auxiliary handle detachably, and

wherein the second motor and the dust box are disposed on opposite sides of the.

8. The power tool of claim 7, wherein the connecting element is connected with the guiding rod detachably and the connecting element comprises a connecting portion allowing the connecting element to connect with the guiding rod at different positions.

9. The power tool of claim 7, wherein the dust collecting device comprises a battery contained in the dust collecting housing.

10. The power tool of claim 7, wherein the second motor is contained in the dust collecting housing, and the second motor comprises a stator and a rotor being capable of rotating relative to the stator about a first axis substantially perpendicular to the front and rear direction.