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Magnet chuck

A magnetic chuck and yoke technology, applied in the direction of magnetic objects, magnets, permanent magnets, etc., can solve the problems of large-scale devices and difficult to increase the attraction force, and achieve the effect of simple structure and increasing magnetic attraction force.

Inactive Publication Date: 2020-11-13
SMC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is necessary to increase the attractive force when absorbing a heavy workpiece via a magnetic chuck, but when the workpiece is a thin plate, it is not easy to increase the attractive force because magnetic saturation occurs inside the workpiece
In addition, simply selecting a permanent magnet with a large magnetic force will lead to an increase in the size of the device

Method used

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  • Magnet chuck
  • Magnet chuck
  • Magnet chuck

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Hereinafter, preferred embodiments of the magnetic chuck according to the present invention are listed and described with reference to the drawings.

[0029] The magnetic chuck 10 includes a cylinder 12 , a piston assembly 14 , a top cover 16 , a bottom cover 18 and a latch yoke 20 . The magnetic chuck 10 is attached to, for example, a tip arm of an unillustrated robot.

[0030] The cylinder tube 12 is made of a paramagnetic metal such as aluminum alloy. The external shape of the cross section of the cylinder 12 is rectangular except for the fitting part 22 provided at the lower end of the cylinder 12, and the cylinder 12 has four side surfaces. The cross-sectional shape of the fitting portion 22 of the cylinder 12 is circular. A cylinder hole 24 with a circular cross section is formed through the cylinder 12 along the axial direction of the cylinder 12 .

[0031] A first port 26 for air supply and exhaust is provided on one side of the cylinder 12 . The first port ...

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PUM

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Abstract

This magnet chuck (10) has a piston assembly (14), including a tube shaped permanent magnet (42) and a core yoke (40), that is provided to be able to move on the interior of a cylinder tube (12), wherein the permanent magnet (42) is provided on the outer periphery of the core yoke (40), is magnetized in the radial direction, and a magnetic sensor (36) is attached to the side surface of the cylinder tube (12).

Description

technical field [0001] The invention relates to a magnetic chuck which attracts and holds workpieces with the magnetic force of permanent magnets. Background technique [0002] Conventionally, there is known a magnetic chuck in which a permanent magnet is connected to a piston inside a cylinder, and the magnetic chuck displaces the piston and the permanent magnet (for example, JP-A-51-101724). In such a magnetic chuck, the workpiece is attracted and held as the permanent magnet approaches the workpiece following the displacement of the piston subjected to fluid pressure. Also, when the piston is displaced in a direction away from the workpiece, the workpiece is released. [0003] It is necessary to increase the attractive force when absorbing a heavy workpiece via a magnetic chuck, but when the workpiece is a thin plate, it is not easy to increase the attractive force because magnetic saturation occurs inside the workpiece. In addition, simply selecting a permanent magnet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02B23Q3/15B25J15/06
CPCB25J15/0608B66C1/04H01F7/0252H01F7/04B23Q3/1546H01F7/02B25J15/06B23Q2703/02H01F7/0257
Inventor 矢岛久志佐藤太平佐佐木刚原耕二神田浩一郎
Owner SMC CORP