JPH03124030U

JPH03124030U -

Info

Publication number: JPH03124030U
Application number: JP3400290U
Authority: JP
Priority date: 1990-03-29
Filing date: 1990-03-29
Publication date: 1991-12-17

Description

[Brief explanation of the drawing]

第１図はこの考案の実施による渦電流式減速装
置の要部を示す断面図、第２図は第１図の装置の
ケーシングカバーを拡大し、かつ一部を破断して
示す斜視図、第３図は制動オフ状態におけるロー
ターの要部を拡大して示す断面図、第４図は従来
の渦電流式減速装置の断面図、第５図は制動に伴
うローター円筒部内面の温度上昇を試験した結果
を示すグラフである。１……ローター、２……円筒部、２−１……ア
ーム、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……円筒部
（ケーシングカバーの）、１０……すきま、１１
……案内軸、１２……エアーシリンダ、１３……
ロツド。 Fig. 1 is a sectional view showing the main parts of an eddy current reduction device according to this invention, Fig. 2 is an enlarged perspective view of the casing cover of the device shown in Fig. 1, with a part cut away; Figure 3 is an enlarged cross-sectional view of the main parts of the rotor in the braking off state, Figure 4 is a cross-sectional view of a conventional eddy current reduction gear, and Figure 5 is a test of the temperature rise on the inner surface of the rotor's cylindrical part due to braking. This is a graph showing the results. DESCRIPTION OF SYMBOLS 1... Rotor, 2... Cylindrical part, 2-1... Arm, 3... Permanent magnet, 4... Magnet support ring,
5...Casing, 6...Casing cover, 7
... Rotating shaft, 8 ... Pole piece, 9 ... Cylindrical part (of the casing cover), 10 ... Gap, 11
...Guide shaft, 12...Air cylinder, 13...
Rod.

Claims

[Scope of utility model registration request]

It has a magnet support ring surrounding a plurality of permanent magnets in which the polarities of adjacent magnets are opposite to each other. A casing cover made of a non-magnetic material that supports the above-mentioned pole piece at opposing positions is fitted with a casing made of a ferromagnetic material that encloses the permanent magnet in a braking-off position where the permanent magnet is removed from the cylindrical portion of the rotor. In a reduction gear device that has a magnetically shielded casing and is equipped with a control mechanism that controls eddy currents generated in the rotor by the magnetic circuit of the permanent magnet, the cylindrical part is made thinner than the wall thickness of the pole piece by processing a stainless steel plate, and A casing cover for an eddy current speed reduction device, which has a casing cover with holes drilled at positions where a plurality of pole pieces are disposed, and a pole piece is attached to each hole with the outer surface protruding toward the outer periphery.