JPH0463020U

JPH0463020U -

Info

Publication number: JPH0463020U
Application number: JP10634490U
Authority: JP
Priority date: 1990-10-08
Filing date: 1990-10-08
Publication date: 1992-05-29

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例のエンコーダ回転デ
イスク固定装置の斜視図、第２図は第１図Ａ−Ａ
面における断面図、第３図は従来のエンコーダの
回転デイスク固定装置の斜視図、第４図は従来例
の回転デイスクと固定ハブを示す斜視図である。１……回転デイスク、２……固定スリツト、３
……発光ダイオード、４……受光素子基板、５…
…モータシヤフト、５ａ……ねじ孔、５ｂ……断
差軸部、５ｃ……段差端面、６……回転デイスク
ハブ、６ａ……嵌合孔、６ｃ……ねじ挿入孔、８
……皿ばね、９……小ねじ、１０……モータ。 Fig. 1 is a perspective view of an encoder rotating disk fixing device according to an embodiment of the present invention, and Fig. 2 is a perspective view of an encoder rotating disk fixing device according to an embodiment of the present invention.
3 is a perspective view of a conventional rotating disk fixing device for an encoder, and FIG. 4 is a perspective view showing a conventional rotating disk and a fixed hub. 1...Rotating disk, 2...Fixed slit, 3
...Light emitting diode, 4...Light receiving element substrate, 5...
...Motor shaft, 5a...Threaded hole, 5b...Difference shaft portion, 5c...Step end face, 6...Rotating disk hub, 6a...Fitting hole, 6c...Screw insertion hole, 8
... disc spring, 9 ... machine screw, 10 ... motor.

Claims

[Scope of utility model registration request]

a motor, a rotary disk fixed to the motor shaft having a slit through which light can pass, and a fixed slit fixed on a fixed member at a position opposite to the rotating surface of the rotary disk and having a slit through which light can pass. An encoder comprising a light emitting diode fixed on a fixed member and emitting light passing through the slit, and a light receiving element fixed on the fixed member receiving the light passing through the slit,
The means for fixing the rotary disk to the motor shaft includes a stepped shaft portion formed coaxially with the motor shaft and having a smaller diameter than the motor shaft, a stepped end surface between the stepped shaft portion and the motor shaft, and an end surface of the stepped shaft portion. The motor shaft has a screw hole coaxial with the motor shaft provided in the rotary disk, a screw that is screwed into the screw hole, a fitting hole that fits with the stepped shaft portion, and a screw insertion hole into which the screw is inserted, and is fixed to the rotating disk. It consists of a rotating disc hub and an elastic member, the elastic member is sandwiched between the end face of the rotating disc hub and the stepped end face, the fitting hole of the rotating disc hub is fitted into the stepped shaft portion, and the screw is inserted into the fitting hole of the rotating disc hub. An encoder rotary disk fixing device, which fixes the rotary disk to the motor shaft by screwing the rotary disk into the screw hole.