JPH0434883U

JPH0434883U -

Info

Publication number: JPH0434883U
Application number: JP7441990U
Authority: JP
Priority date: 1990-07-13
Filing date: 1990-07-13
Publication date: 1992-03-24

Description

[Brief explanation of the drawing]

第１図は請求項１記載の考案を実施した場合の
磁気シールドケーシングの要部を示す断面図、第
２図は上記磁気シールドケーシングの一部を示す
斜視図、第３図は請求項２記載の考案を実施した
場合の要部を示す側面図、第４図は第３図の側面
図で一部はＡ−Ａ線上の断面を示す、第５図は第
４図に示す磁気シールドケーシングの一部を示す
斜視図、第６図は従来の渦電流式減速装置の一例
を示す断面図、第７図はその一部を示す斜視図で
ある。１……ローター、２……円筒部、３……永久磁
石、４……磁石支持リング、５……ケーシング、
６……ケーシングカバー、７……回転軸、８……
ポールピース、９……補強リング、１０……ボス
部、１１……案内棒、１２……シリンダー、１３
……ロツド。 FIG. 1 is a cross-sectional view showing a main part of a magnetic shielding casing when the invention according to claim 1 is implemented, FIG. 2 is a perspective view showing a part of the magnetic shielding casing, and FIG. 3 is a diagram according to claim 2. FIG. 4 is a side view of the main part of the case where the invention is implemented, FIG. 4 is a side view of FIG. FIG. 6 is a sectional view showing an example of a conventional eddy current speed reduction device, and FIG. 7 is a perspective view showing a portion thereof. DESCRIPTION OF SYMBOLS 1... Rotor, 2... Cylindrical part, 3... Permanent magnet, 4... Magnet support ring, 5... Casing,
6... Casing cover, 7... Rotating shaft, 8...
Pole piece, 9... Reinforcement ring, 10... Boss section, 11... Guide rod, 12... Cylinder, 13
...Lotsud.

Claims

[Claims for Utility Model Registration] 1. A magnet support ring having a plurality of permanent magnets arranged around it so that the polarities of adjacent magnets are opposite to each other, and the pole faces of the permanent magnets are connected to each other through a pole piece. A casing cover made of a non-magnetic material that supports the above-mentioned pole piece at a position facing the cylindrical portion of the rotor with a required gap, and a casing cover made of a non-magnetic material that encapsulates the permanent magnet in a braking-off state where the permanent magnet is removed from the cylindrical portion of the rotor. In a reduction gear device that has a magnetically shielded casing fitted with a magnetic casing, and is equipped with a control mechanism that controls eddy currents generated in the rotor by the magnetic circuit of the permanent magnet, a An eddy current reduction gear in which a reinforcing ring made of a magnetic or weakly magnetic material is welded, and the reinforcing ring is cast with a non-magnetic material such as aluminum to fixedly support the pole piece. 2. It has a magnet support ring surrounding a plurality of permanent magnets so that the polarities of adjacent magnets are opposite to each other, and the pole faces of the permanent magnets are connected to the cylindrical part of the rotor with a required gap through the pole piece. A non-magnetic casing cover supporting the pole piece at a position facing the rotor is fitted with a ferromagnetic casing enclosing the permanent magnet at a braking-off position where the permanent magnet is removed from the cylindrical portion of the rotor. In a speed reduction device that has a magnetically shielded casing and is provided with a control mechanism that controls eddy currents generated in the rotor by the magnetic circuit of the permanent magnet,
A magnetically shielded casing in which a pole piece with a non-magnetic or weakly magnetic reinforcing ring welded to the inner circumferential side and a ferromagnetic casing are arranged in a predetermined positional relationship and integrated by being cast with a non-magnetic material such as aluminum. Eddy current reduction device with.