MULTIFUNCTIONAL MACHINE

• US 20140290072A1
• Filed: 03/31/2014
• Published: 10/02/2014
• Est. Priority Date: 09/29/2011
• Status: Abandoned Application

• Current Assignee: Positec Power Tools Suzhou Co Ltd (Positec Group Limited)
• Original Assignee: Positec Power Tools Suzhou Co Ltd (Positec Group Limited)
• Inventors: Brown, Warren, Gerhardt, Graham, Gu, Hua, Wu, Haiquan, Li, Hui, Szommer, Harry
• Application Number:
  US14/230,802
• Publication Number:
  US 20140290072A1
• Time in Patent Office: Days
• US Class Current: 30/272.1
• CPC Class Codes: B24B 23/04 with oscillating grinding tools; Accessories therefor
• CPC Class Codes: B24B 27/08 being portable
• CPC Class Codes: B24B 45/00 Means for securing grinding wheels on rotary arbors suppression of vibrations in systems F16F15/00; testing static or dynamic balancing of machines G01M1/00
• CPC Class Codes: B25F 3/00 Associations of tools for different working operations with one portable power-drive means; Adapters therefor
• CPC Class Codes: B26D 1/12 having a cutting member moving about an axis B26D1/547 takes precedence; cup or like cutting members B26D1/44
• CPC Class Codes: B26D 7/2614 Means for mounting the cutting member

Abstract

An oscillatory power tool comprising: an output shaft for mounting a cutting tool and driving the cutting tool in an oscillating rotary motion; a fastener for fastening the cutting tool to the output shaft; the cutting tool comprising a securing section being capable of connecting with the output shaft; a driving section disposed on the free end of the output shaft for engaging with the securing section of the cutting tool; the driving section having a friction surface for contacting a surface of the securing section. Through close fit between the friction surface and the upper surface of the securing section, the oscillatory power tool can be connected with different types of cutting tools, thus greatly improving the universality and convenience of the oscillatory power tool.

Claims

1. An oscillatory power tool capable of using various types of cutting tools, the oscillatory power tool comprising:

an output shaft for mounting a cutting tool and driving the cutting tool in an oscillatory rotary motion;

a fastener for fastening the cutting tool to the output shaft;

the cutting tool comprising a securing section being capable of connecting with the output shaft;

an end of the output shaft having a driving section for engaging with the securing section of the cutting tool;

the driving section having a fitting surface for contacting a surface of the securing section, the fitting surface being formed by a plurality of protrusions.

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

3. The oscillatory power tool according to claim 2, wherein the various types of cutting tools comprise a first cutting tool and a second cutting tool, the first cutting tool comprises a first center surface which is parallel with the fitting surface and a first connecting hole for allowing the fastener to pass through;

the second cutting tool comprises a second center surface which is parallel with the fitting surface and a second connecting hole for allowing the fastener to pass through;

the locating element is capable of contacting at least part of the first connecting hole and at least part of the second connecting hole, and the locating element comprising a first cross-section within the first center surface and a second cross-section within the second center surface, the first cross-section is different from the second cross-section.

4. The oscillatory power tool according to claim 3, wherein an outline of the first cross-section is formed a first circumcircle;

an outline of the second cross-section is formed a second circumcircle;

a diameter of the first circumcircle is not equal with a diameter of the second circumcircle.

5. The oscillatory power tool according to claim 3, wherein a shape of the first cross-section is different from a shape of the second cross-section.

6. The oscillatory power tool according to claim 3, wherein the locating element comprises a centre hole for allowing the fastener to pass through and an outer peripheral surface around the centre hole, the outer peripheral surface comprises a first outline set axially for contacting the first connecting hole and a second outline set axially for contacting the second connecting hole.

7. The oscillatory power tool according to claim 6, wherein the outer peripheral surface comprises at least one conical surface, the first outline and the second outline are disposed on the conical surface.

8. The oscillatory power tool according to claim 6, wherein the outer peripheral surface at least comprises a first cylindrical surface and a second cylindrical surface;

the first outline is disposed on the first cylindrical surface;

the second outline is disposed on the second cylindrical surface.

9. The oscillatory power tool according to claim 2, wherein the locating element comprises a form-fit portion for transporting torque from the output shaft to the cutting tool and an adapting portion for matching with the cutting tool.

10. The oscillatory power tool according to claim 9, wherein the adapting portion at least comprises a first adaptor and a second adaptor, the first adaptor and the second adaptor matching with different connecting holes with different shapes.

11. The oscillatory power tool according to claim 10, wherein the locating element comprises a plate shaped body, the form-fit portion is formed by a portion extended from the out circular peripheral of the plate shaped body along outer radial direction, the first adaptor and the second adaptor are formed by portions protruded from a side of the plate shaped body along axial direction.

12. The oscillatory power tool according to claim 11, wherein the form-fit portion comprises at least two form-fit elements extended from the out circular peripheral of the plate shaped body along the outer radial direction.

13. The oscillatory power tool according to claim 12, wherein the second adaptor is disposed on one side of the first adaptor along axial direction, a radial dimension of the first adaptor is not equal with a radial dimension of the second adaptor.

14. The oscillatory power tool according to claim 10, wherein the first adaptor and the second adaptor on a plane vertical to the output shaft are different in the projection shape.

15. The oscillatory power tool according to claim 10, wherein the locating element further comprises a third adaptor set relative to the first adaptor and the second adaptor along the axial direction, a radial dimension of the third adaptor is less than a radial dimension of the first adaptor or the second adaptor.

16. The oscillatory power tool according to claim 15, wherein an outline of the third adaptor is a conical surface or a cylindrical surface.

17. The oscillatory power tool according to claim 2, wherein the fastener comprises a pressing plate contacted to the cutting tool;

the elastic element is disposed between the output shaft and the locating element.

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

the elastic element is disposed between the output shaft and the locating element.

19. The oscillatory power tool according to claim 1, wherein the oscillatory power tool comprises a locating element and an elastic element, the elastic element drives the locating element to always radially move towards a direction for contacting with a connecting hole of the cutting tool.

20. The oscillatory power tool according to claim 19, wherein the various types of cutting tools comprise a first cutting tool and a second cutting tool, the first cutting tool comprises a first center surface paralleled with the fitting surface and a first connecting hole for the fastener passing through;

the second cutting tool comprises a second center surface paralleled with the fitting surface and a second connecting hole for the fastener passing through, the locating element comprises at least two locating blocks disposed circumferentially, at least two locating blocks contacting with the first connecting hole and defining a first cross-section on the first center surface;

the at least two locating blocks are contacted with the second connecting hole and defining a second cross-section on the second center surface, the location of the first cross-section is different from the location of the second cross-section relative to the output shaft.

21. The oscillatory power tool according to claim 2, wherein the locating element having an outer peripheral surface for matching with a connecting hole of the cutting tool, the radial dimension of the outer peripheral surface increases.

22. The oscillatory power tool according to claim 3, wherein the outer peripheral surface comprises at least one conical surface.

23. The oscillatory power tool according to claim 3, wherein the outer peripheral surface comprises at least two cylindrical surfaces.

24. An oscillatory power tool comprising:

an output shaft for mounting a cutting tool and driving the cutting tool in an oscillating rotary motion;

a fastener for fastening the cutting tool to the output shaft;

the cutting tool comprising a securing section being capable of connecting with the output shaft;

an end of the output shaft having a driving section for engaging with the securing section of the cutting tool;

the driving section having a fitting surface for contacting a surface of the securing section, a plurality of recesses are formed from the fitting surface.

25. An oscillatory power tool comprising:

an output shaft for mounting a cutting tool and driving the cutting tool in an oscillating rotary motion;

a fastener for fastening the cutting tool to the output shaft;

the cutting tool mounted on the output shaft comprising a securing section being capable of connecting with the output shaft;

a plurality of protrusions extended from the output shaft for contacting a surface of the securing section of the cutting tool.