阅读说明：本技术 一种电机测速码盘固定装置 (Motor speed measurement code wheel fixing device ) 是由 张剑罡 徐希翼 许梁 张允明 苗立东 于 2019-12-12 设计创作，主要内容包括：本发明提供一种电机测速码盘固定装置,由两个材料结构完全相同的轴套、码盘和固定所用的胶水组成,轴套采用与电机轴相匹配的圆筒形塑料或尼龙套。通过两个轴套把码盘夹紧并且用胶水粘贴的方式将码盘固定在电机轴上。本发明具有结构简单、使用方便、材料易得、可靠性较高的优点。(The invention provides a motor speed measuring coded disc fixing device which comprises two shaft sleeves with completely same material structures, a coded disc and glue used for fixing, wherein the shaft sleeves are cylindrical plastic or nylon sleeves matched with a motor shaft. The coded disc is clamped by the two shaft sleeves and fixed on the motor shaft in a glue adhesion mode. The invention has the advantages of simple structure, convenient use, easily obtained materials and higher reliability.)

1. A motor speed measuring coded disc fixing device is characterized by comprising two shaft sleeves with completely same material structures, a coded disc and glue for fixing, wherein the shaft sleeves are cylindrical nylon or plastic sleeves matched with a motor shaft, and the glue is 302 glue; firstly, a layer of glue is coated on a motor shaft, then the first shaft sleeve is installed on the motor shaft, the coded disc is fixed to a proper position by adjusting the position of the shaft sleeve, the coded disc is placed on the shaft sleeve, then the second shaft sleeve is sleeved on the shaft sleeve, and the coded disc is fixed by the adhesive force of the glue and the tightening force of the two shaft sleeves to the coded disc.

Technical Field

The invention provides a fixing device for a motor speed measuring code disc, and particularly relates to the situation of single-piece or small-batch manufacturing of experimental teaching equipment.

Background

The rotating speed of the motor is one of main parameters of the operating condition of the motor and is a knowledge point which needs to be taught frequently in the course of teaching of related professional courses. The mastering of the speed measurement knowledge points is often completed by matching with experimental teaching equipment. The coded disc is fixedly arranged on a motor shaft, a plurality of holes are uniformly distributed on the coded disc along the circumference, a pulse signal is generated when the motor shaft rotates by an angle of one hole in cooperation with a photoelectric effect, and the rotating speed of the motor can be obtained through subsequent processing. The principle is widely applied to related industrial products, and mature and matched sensors such as photoelectric encoders are also available. However, in order to ensure reliability, the industrial photoelectric encoder packages related components together, and has defects in demonstration of related principles, so that the teaching effect is influenced.

In the course experiment teaching process, the code disc device is self-made, but due to the small quantity, the code disc device is generally manufactured in a mode of not using a mold for injection molding due to the cost, a thin plate is often processed in a mode of punching holes, and then the code disc device is adhered to a motor shaft by glue; if a thick plate is used for opening, the installation performance is improved, but the cost is increased correspondingly, and the installation space may be limited. The scheme is designed in particular in consideration of the relation between the cost and the effect, and the motor speed measuring coded disc is fixed with a good effect through practice.

Disclosure of Invention

The invention aims to provide a motor speed measuring coded disc fixing device which is low in cost, simple and easy to use.

The technical scheme for fixing the code disc is as follows:

the motor shaft sleeve is composed of two shaft sleeves with completely same material structures, a code disc and glue for fixing, wherein the shaft sleeves are cylindrical nylon or plastic sleeves matched with a motor shaft, and the glue is 302 glue (also called Gembier glue and formed by mixing A glue and B glue). Firstly, a layer of glue is coated on a motor shaft, then the first shaft sleeve is installed on the motor shaft, the coded disc is fixed to a proper position by adjusting the position of the shaft sleeve, the coded disc is placed on the shaft sleeve, then the second shaft sleeve is sleeved on the shaft sleeve, and the coded disc can be fixed by the matching of the first shaft sleeve and the motor shaft, the second shaft sleeve and the motor shaft and the viscosity of the glue.

The invention aims at the condition of single-piece or small-batch production, and has the advantages of low cost, simple and convenient operation steps, higher reliability, easiness and the like.

Drawings

FIG. 1 is a view showing a structure in which a code wheel is fixed.

Fig. 2 is a schematic view of the bushing 1 and the bushing 2.

Fig. 3 is a sectional view of the sleeve 1 and the sleeve 2.

FIG. 4 is a schematic view of a code wheel structure.

In the figure: 1. a motor shaft; 2. a shaft sleeve 1; 3. code disc; 4. and a shaft sleeve 2.

Detailed Description

The motor shaft 1 is an optical axis with the diameter of 2 mm, the shaft sleeve is in a cylindrical shape, the height is 2.5 mm, the diameter of an inner hole is 2 mm, the outer diameter is 5 mm, and the glue is 302AB glue, which can be purchased in the market conveniently; the thickness of the code disc is 1mm, and the code disc is a customized product and is manufactured by adopting a printed circuit board process; coating glue on a motor shaft 1, sleeving a first shaft sleeve 2, coating glue on the motor shaft for the first time, and sequentially installing a coded disc 3 and a second shaft sleeve 4; the coded disc 3 is tightly clamped by the first shaft sleeve 2 and the second shaft sleeve 4, and after the glue is solidified, the coded disc is fixed on the motor shaft 1.