MAGNETIC CHUCK

• US 20090184789A1
• Filed: 04/24/2007
• Published: 07/23/2009
• Est. Priority Date: 04/24/2006
• Status: Active Grant

• Current Assignee: Yong Goo Lee
• Original Assignee: Yong Goo Lee
• Inventors: Lee, Yong Goo
• Granted Patent: US 7,940,149 B2
• Time in Patent Office: Days
• US Class Current: 335/289
• CPC Class Codes: B23Q 3/1546 using permanent magnets

Abstract

The present invention is a magnetic chuck that is chiefly used for machining tools. The magnetic chuck has a structure in which an accommodation hole (110a) is formed to pass through a chuck main body (110), a first magnetic element (141) is exposed in the direction of the top surface of the chuck main body (110), and an AlNiCo magnet (120) is exposed in the direction of the bottom surface of the chuck main body (110), so that respective objects (200 and 300) to be attached can be attached to two opposite surfaces of the magnetic chuck (100), with the result that the magnetic chuck (100) can be used in various ways. Furthermore, the lateral part (112) of the chuck main body (110) is not unnecessary, so that the weight of the magnetic chuck (100) itself is greatly reduced and thus the product cost is reduced, the thickness of the magnetic chuck (100) is reduced, and convenience of use can be greatly improved.

Claims

1. A magnetic chuck, the magnet chuck having a structure in which elements inserted into an accommodation hole of a chuck main body are bound together by filling material and are mounted in the accommodation hole of the chuck main body, the magnetic chuck comprising:

a chuck main body made of magnetic material and provided with a accommodation hole;

an AlNiCo magnet inserted into the accommodation hole of the chuck main body;

a coil inserted into the accommodation hole of the chuck main body and configured to surround the AlNiCo magnet;

a first magnetic element inserted into the accommodation hole of the chuck main body and disposed above and adjacent to the AlNiCo magnet; and

a first ferrite (or rare-earth) magnet inserted into the accommodation hole of the chuck main body and disposed adjacent to a circumferential surface of the first magnetic element;

wherein the accommodation hole is formed to pass through the chuck main body, the first magnetic element is exposed in a direction of a top surface of the chuck main body, and the AlNiCo magnet is exposed in a direction of a bottom surface of the chuck main body.

2. The magnetic chuck according to claim 1, further comprising ejection units that are installed in the chuck main body and elastically support an attached object outward.

3. The magnetic chuck according to claim 1, further comprising contact sensors that are installed in the chuck main body and detect whether contact with an attached object has been made.

4. The magnetic chuck according to claim 1, further comprising a support mechanism that is installed in the chuck main body and supports an attached object.

5. The magnetic chuck according to claim 1, further comprising a second magnetic element, which is inserted into the accommodation hole of the chuck main body and is disposed below and adjacent to the AlNiCo magnet;

and

a second ferrite (or rare-earth) magnet, which is inserted into the accommodation hole of the chuck main body and is disposed adjacent to a circumferential surface of the second magnetic element.

wherein the first magnetic element is exposed in the direction of the top surface of the chuck main body, and the second magnetic element is exposed in a direction of a bottom surface of the chuck main body.

6. The magnetic chuck according to claim 2, further comprising a second magnetic element, which is inserted into the accommodation hole of the chuck main body and is disposed below and adjacent to the AlNiCo magnet;

and

a second ferrite (or rare-earth) magnet, which is inserted into the accommodation hole of the chuck main body and is disposed adjacent to a circumferential surface of the second magnetic element;

wherein the first magnetic element is exposed in the direction of the top surface of the chuck main body, and the second magnetic element is exposed in a direction of a bottom surface of the chuck main body.

7. The magnetic chuck according to claim 3, further comprising a second magnetic element, which is inserted into the accommodation hole of the chuck main body and is disposed below and adjacent to the AlNiCo magnet;

and

a second ferrite (or rare-earth) magnet, which is inserted into the accommodation hole of the chuck main body and is disposed adjacent to a circumferential surface of the second magnetic element;

wherein the first magnetic element is exposed in the direction of the top surface of the chuck main body, and the second magnetic element is exposed in a direction of a bottom surface of the chuck main body.

8. The magnetic chuck according to claim 4, further comprising a second magnetic element, which is inserted into the accommodation hole of the chuck main body and is disposed below and adjacent to the AlNiCo magnet;

and

a second ferrite (or rare-earth) magnet, which is inserted into the accommodation hole of the chuck main body and is disposed adjacent to a circumferential surface of the second magnetic element;

wherein the first magnetic element is exposed in the direction of the top surface of the chuck main body, and the second magnetic element is exposed in a direction of a bottom surface of the chuck main body.