Power tool system and tool attachment device

Patent metadata

Field	Value
Publication number	US-11999036-B2
Application number	US-202117363589-A
Country	US
Kind code	B2
Filing date	Jun 30, 2021
Priority date	Jun 30, 2020
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A tool attachment device for assisting a power tool in performing nailing includes a shell assembly, a rocker, a connection device, a driving wheel, and a transmission assembly. A side of the shell assembly is formed with a hole passage. The rocker is partially placed in the hole passage and is rotatable in the hole passage. The connection device is connected to the rocker and rotates synchronously with the rocker. Nail feeding structures are formed on the driving wheel along a circumferential direction of the driving wheel. The transmission assembly is connected to the driving wheel and the connection device and is configured to drive the driving wheel to rotate unidirectionally. The transmission assembly is disposed between the connection device and the driving wheel.

First claim

What is claimed is:

1. A tool attachment device for assisting a power tool in performing nailing, comprising:
a shell assembly, wherein a side of the shell assembly is formed with a hole passage;
a rocker partially placed in the hole passage and rotatable in the hole passage;
a connector rotatably coupled to the rocker and rotatable synchronously with the rocker;
a driving wheel, comprising a plurality of nail feeding structures formed on the driving wheel along a circumferential direction of the driving wheel; and
a transmission coupled to the driving wheel and the connector to drive the driving wheel to rotate unidirectionally,
wherein the transmission is disposed between the connector and the driving wheel, and
the transmission comprises a first ratchet wheel, a second ratchet wheel, and an elastic element, the elastic element is disposed between the first ratchet wheel and the second ratchet wheel, and the elastic element is a device that can store energy through compression.

2. The tool attachment device of claim 1 , wherein the connector comprises a rotatable disk and a first engagement portion disposed on a side of the rotatable disk and the first engagement portion is connected to the transmission in a unidirectional stop-rotation manner.

3. The tool attachment device of claim 2 , wherein the transmission comprises a central shaft, the first ratchet wheel comprises a first ratchet and a first shaft hole, the second ratchet wheel comprises a second ratchet and a second shaft hole, and the central shaft passes through the first shaft hole and/or the second shaft hole.

4. The tool attachment device of claim 3 , wherein a plurality of first ratchets are disposed on a side of the first ratchet wheel and surround the first shaft hole, the first ratchet is formed with a step slope and a stop surface, and the first engagement portion is formed at a first stop-rotation ratchet disposed opposite to the first ratchet.

5. The tool attachment device of claim 4 , wherein the driving wheel comprises a drum formed with an accommodating cavity and a wheel disk fixedly connected to the drum, the transmission is placed in the accommodating cavity, the drum comprises a first connection portion, the transmission is formed with a second connection portion, the drum is connected to the transmission through the first connection portion and the second connection portion, the nail feeding structures are uniformly distributed on the wheel disk along a circumferential direction of the wheel disk, and the shell assembly further comprises a second engagement portion formed with a second stop-rotation ratchet disposed opposite to the second ratchet.

6. The tool attachment device of claim 4 , wherein the driving wheel is fixedly connected to the central shaft, the central shaft is rotatably connected to the first ratchet wheel in a synchronous manner, the driving wheel comprises a second engagement portion, and the second engagement portion is formed with a second stop-rotation ratchet disposed opposite to the second ratchet.

7. The tool attachment device of claim 2 , wherein a side of the rotatable disk is formed with a mounting groove, the first engagement portion constitutes a side wall of the mounting groove, and the elastic element is disposed in the mounting groove and unidirectionally rotatable in the mounting groove.

8. The tool attachment device of claim 7 , wherein the transmission comprises a central shaft, the central shaft is fixedly connected to the elastic element, the elastic element is formed with at least two extension arms, the first engagement portion is configured to limit the at least two extension arms to rotate unidirectionally in the mounting groove.

9. The tool attachment device of claim 1 , wherein the shell assembly comprises a main shell, a nail feeding shell capable of moving back and forth relative to the main shell in a nail feeding direction, and a guide structure formed in the nail feeding shell, and the tool attachment device further comprises an extension rod configured to pass through the guide structure to drive a screw to rotate.

10. The tool attachment device of claim 1 , wherein a number of driving wheels is one.

11. The tool attachment device of claim 1 , further comprising a mounting device, wherein the mounting device is disposed in the shell assembly and configured to be connected to a front end of the power tool and the mounting device comprises a stop-rotation connection portion connected to the power tool in a stop-rotation manner, a sliding groove disposed in the mounting device and provided with an opening on a surface of the mounting device, and a positioning device, the positioning device comprises an elastic piece and a stop piece disposed in the sliding groove and abutting against the elastic piece, the shell assembly comprises a plurality of limiting grooves, and the stop piece is capable of being limited between the sliding groove and the limiting groove by the elastic piece.

12. The tool attachment device of claim 11 , further comprising a connection hole disposed in the mounting device and penetrating through the mounting device, a roll ball disposed in the connection hole, and a switching device having a locking state configured to limit the roll ball in a first position where the roll ball is capable of being connected to a power tool system and the power tool and an unlocking state configured to allow the roll ball to move between a second position and the first position within the connection hole.

13. A power tool system, comprising:
a power tool comprising an output portion rotatable about a first axis;
a tool attachment device, wherein the tool attachment device comprises:
a shell assembly, wherein a side of the shell assembly is formed with a hole passage;
a rocker partially placed in the hole passage and rotatable in the hole passage;
a connector connected to the rocker and rotatable synchronously with the rocker;
a driving wheel, wherein nail feeding structures are formed on the driving wheel along a circumferential direction of the driving wheel, and a number of driving wheels is one; and
a transmission connected to the driving wheel and the connector and configured to drive the driving wheel to rotate unidirectionally,
wherein the transmission is disposed between the connector and the driving wheel, and
the transmission comprises a first ratchet wheel, a second ratchet wheel, and an elastic element, the elastic element is disposed between the first ratchet wheel and the second ratchet wheel, and the elastic element is a device that can store energy through compression.

14. The power tool system of claim 13 , wherein the tool attachment device further comprises a mounting device disposed in the shell assembly and configured to be connected to a front end of the power tool, a limiting ring disposed on a front end of the mounting device along a circumferential direction, and a stop piece abutting against the limiting ring, the front end of the power tool is formed with a fitting portion connected to the tool attachment device, the mounting device comprises at least two mounting holes, and the stop piece is placed in the at least two mounting holes and biased by the limiting ring such that the stop piece clamps the fitting portion to enable the power tool to be rotatable relative to the tool attachment device and fixed to at least two positions.

15. The power tool system of claim 14 , wherein an inner periphery of the mounting device is provided with a groove, the front end of the power tool is formed with a convex rib, and the convex rib is configured to be placed into the

Assignees

• Nanjing Chervon Ind Co Ltd

Inventors

• Jiang Jie
• Berman Corey
• Lan Ran
• CHUA Bun Hiong
• Rybka Matthew
• Ye Junjie

Classifications

• B25C1/001 Primary

  Nail feeding devices (B25C1/184 takes precedence) · CPC title

• B25C7/00 Primary

  Accessories for nailing or stapling tools, e.g. supports (for tools operated by detonation of a cartridge B25C1/18) · CPC title

• B25B23/04

  for feeding screws or nuts · CPC title

• B25C1/06

  operated by electric power · CPC title

• B25F3/00 Primary

  Associations of tools for different working operations with one portable power-drive means; Adapters therefor · CPC title