Multifunctional machine

Patent metadata

Field	Value
Publication number	US-10946544-B2
Application number	US-201816230446-A
Country	US
Kind code	B2
Filing date	Dec 21, 2018
Priority date	Sep 29, 2011
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

An oscillatory power tool that is capable of using various types of cutting tools is disclosed. The power tool includes an output shaft for mounting one of the cutting tools and driving the cutting tool in an oscillating rotary motion. An end of the output shaft has a driving section for engaging with a securing section of the cutting tool. The power tool further includes a fastener connected to the output shaft at the end and connectable to the securing section of the cutting tool for fastening the cutting tool to the end of the output shaft. The driving section has a fitting surface for contacting a surface of the securing section. Through a close fit between the friction surface and the surface of the securing section, the power tool can be connected with different types of cutting tools, which greatly improves the universality and convenience of the power tool.

First claim

The invention claimed is:

1. An oscillatory power tool comprising:
a replaceable cutting tool including a securing section having a surface and a connecting hole having a center;
an output shaft defining a longitudinal axis and having a driving end, the driving end having a matching surface for engaging with the surface of the securing section of the cutting tool, the output shaft defining a depression;
a locating element comprising a form-fit portion at least partially received in the depression of the output shaft for aligning the center of the connecting hole with the longitudinal axis and for transporting torque from the output shaft to the cutting tool,
wherein the locating element further comprises an adapting portion comprising a first adaptor and a second adaptor to be received in the connecting hole to align the center of the cutting tool with the longitudinal axis,
wherein the first adaptor and the second adaptor on a plane normal to the longitudinal axis of the output shaft are different in a projection shape; and
a fastener passing through the locating element to engage with a fastening element for fastening the cutting tool to the driving end.

2. The oscillatory power tool according to claim 1 , further comprising an elastic element disposed between the depression and the locating element to drive the locating element to always axially move towards a direction for contacting the cutting tool.

3. The oscillatory power tool according to claim 2 , wherein the locating element is disposed in the output shaft.

4. The oscillatory power tool according to claim 1 , wherein the locating element comprises a plate body, wherein the form-fit portion is formed as a radial outward extension of the outer circumference of the plate body, the first adaptor and the second adaptor are formed by portions protruded from a side of the plate body.

5. The oscillatory power tool according to claim 4 , wherein the form-fit portion comprises at least two form-fit elements extended from the outer circular peripheral of the plate body along the radial outward extension of the outer circumference of the plate body.

6. The oscillatory power tool according to claim 5 , wherein the second adaptor is disposed on one side of the first adaptor, wherein a radial dimension of the first adaptor is not equal to a radial dimension of the second adaptor.

7. An oscillatory power tool comprising:
a replaceable cutting tool including a securing section having a surface and a connecting hole having a center;
an output shaft defining a longitudinal axis and having a driving end, the driving end of the output shaft having a matching surface for engaging with the securing section of the cutting tool, the output shaft defining a depression;
a locating element comprising a form-fit portion at least partially received in the depression for centering the cutting tool relative to the output shaft and for transporting torque from the output shaft to the cutting tool,
wherein the locating element further comprises an adapting portion comprising a first adaptor and a second adaptor, wherein the first adaptor and the second adaptor are shaped differently; and
a fastener passing through the locating element to engage with a fastening element for fastening the cutting tool to the driving end.

Assignees

• Positec Power Tools Suzhou Co Ltd

Inventors

• Brown Warren
• Szommer Harry
• Gerhardt Graham
• Gu Hua
• Wu Haiquan
• Li Hui

Classifications

• B24B23/04

  with oscillating grinding tools; Accessories therefor · CPC title

• B24B27/08

  being portable · CPC title

• B26D1/12

  having a cutting member moving about an axis (B26D1/547 takes precedence; cup or like cutting members B26D1/44) · CPC title

• B25F3/00

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

• B26D7/2614 Primary

  Means for mounting the cutting member · CPC title