Power tool

Patent metadata

Field	Value
Publication number	US-10525577-B2
Application number	US-201715817517-A
Country	US
Kind code	B2
Filing date	Nov 20, 2017
Priority date	Nov 25, 2016
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A power tool includes a housing, a prime mover disposed in the housing, a first cylinder formed with a first chamber, a first rotating member rotatable with respect to the first cylinder about a first axis under the driving of the prime mover, a first piston movable in a direction parallel to the first axis when the first rotating member rotates relative to the first cylinder. The first cylinder and the first rotating member are disposed within the housing. The first piston is disposed within the first chamber The first rotating member is formed with a first transmission structure to drive the first piston The first piston is formed with a second transmission structure capable of cooperating with the first transmission structure to rotate the first rotation member to drive the first piston.

First claim

What is claimed is:

1. A power tool, comprising:
a housing;
a prime mover disposed in the housing;
a first cylinder formed with a first chamber;
a first rotating member rotatable with respect to the first cylinder about a first axis under a driving force of the prime mover; and
a first piston movable in a direction parallel to the first axis when the first rotating member rotates relative to the first cylinder;
wherein the first cylinder and the first rotating member are disposed within the housing, the first piston is disposed within the first chamber, the first rotating member is formed with a first transmission structure to drive the first piston, and the first piston is formed with a second transmission structure capable of cooperating with the first transmission structure to rotate the first rotation member to drive the first piston.

2. The power tool of claim 1 , wherein the prime mover comprises a prime mover shaft rotatable about a second axis perpendicular to the first axis and the power tool further comprises a reversing mechanism for reversing between the prime mover shaft and the first rotating member.

3. The power tool of claim 2 , wherein the reversing mechanism comprises a first shaft that can be driven by the prime mover to rotate about the second axis, the first shaft is formed with or connected to a first bevel gear, and the first rotation member is formed with or connected to a second bevel gear capable of matching with the first bevel gear.

4. The power tool of claim 3 , wherein the first piston is formed with a transmission hole, the first rotary member is at least partially located in the transmission hole, the first transmission structure is an external thread formed on an outer periphery of the first rotating member, and the second transmission structure is an internal thread provided on the hole wall of the transmission hole.

5. The power tool of claim 1 , wherein the power tool further comprises:
a striking pin for outputting an impact force;
a second cylinder formed with a second chamber; and
a second piston movably disposed in the second chamber along a direction parallel to the first axis and forming a fixed connection with the striking pin;
wherein the second chamber is in communication with the first chamber.

6. The power tool of claim 5 , wherein the second cylinder partially overlaps with the first cylinder in a plane substantially perpendicular to the first axis, the portion where the second cylinder and the first cylinder overlap protrudes toward the first cylinder, and the first piston is limited in position by a portion where the second cylinder and the first cylinder overlap so as to be restricted from rotating circumferentially.

7. The power tool of claim 5 , wherein the power tool further comprises a cylinder housing comprising a partition capable of partitioning it into the first chamber to form the first cylinder and the second chamber to form the second cylinder and the partition protrudes toward the first cylinder.

8. The power tool of claim 1 , wherein the power tool further comprises a third piston that is movable in a direction opposite to a movement direction of the first piston when the first rotating member is rotated with respect to the first cylinder, the third piston is disposed in the first chamber, the first rotating member is further formed with a third transmission structure to drive the third piston, and the third piston is formed with a fourth transmission structure capable of cooperating with the third transmission structure to rotate the first rotating member to drive the third piston.

9. The power tool of claim 1 , wherein the power tool further comprises a decelerating mechanism disposed between the prime mover and the first rotating member.

10. The power tool of claim 1 , wherein the first rotating member is fixed relative to the axial position of the first cylinder.

Assignees

• Nanjing Chervon Ind Co Ltd

Inventors

• Masatoshi Fukinuki
• Hao Jingdong

Classifications

• B25C1/06

  operated by electric power · CPC title

• B25C1/047

  Mechanical details · CPC title

• B25D2250/301

  Torque transmission means · CPC title

• B25D9/08

  comprising a built-in air compressor {, i.e. the tool being driven by air pressure} · CPC title

• B25C1/04 Primary

  operated by fluid pressure {, e.g. by air pressure} · CPC title