KR200277402Y1 - Encoder cover of motor - Google Patents

Abstract

A plurality of stator yoke 110 press-fitted into the housing 100 and a plurality of rotatably inserted through the stator yoke 110, the rotating shaft 40 is rotated through the inside of the yoke 110, the rotation shaft 40 In a motor provided with a magnet 70, an encoder 20 installed at an end of the rotating shaft, and an encoder cover 10 for protecting the encoder 20, an inclination 130 is provided at an end of the encoder cover 10. In order to maintain the airtightness with the rear bracket 30 by improving the tightening force of the encoder cover 10, the encoder 20 can be optimally protected by improving the tightening force, thereby improving the operating environment of the motor. It relates to an encoder cover 10 of a motor that has an effect.

Description

Encoder cover of motor

The present invention relates to the structure of the encoder cover of the motor, and when the encoder cover for protecting the encoder to the rear bracket, relates to the structure of the encoder cover to improve the adhesion by firmly tightening the rear bracket and the encoder cover.

In general, the permanent magnet brushless motor is configured to generate an electromagnetic field by applying an AC power to the stator coil and to generate a torque to the rotor by the interaction of the rotor and the electromagnetic force composed of the permanent magnet.

A general brushless motor having such a function includes a stator 110 in which thin silicon steel sheets having slots (not shown) are axially stacked in the housing 100 constituting the body of the motor, as shown in FIG. The coil 60 wound in the slot of the stator 110 to which power is applied, and the rotor 120 and the rotating shaft 40 that transmit rotational force are pressed into and coupled to each other.

In addition, the rotating shaft 40 is fastened to both ends to facilitate the rotation and minimize the friction ball bearing 90 is fastened together with the rear bracket 30, the magnets attached to the rotor 40 on the side of the rear bracket The encoder 20 is provided which recognizes the position of 70 and generates a signal for supplying a current suitable for the position.

Since the encoder 20 requires precision and an obstacle from the outside may be impaired or the operation itself may be defective or impossible, the encoder cover 10 may need to be shielded to protect the encoder 20. It was configured in the form to wrap (20). Of course, it is common to fasten the encoder cover 10 and the rear bracket 30 using a bolt.

As the brushless motor configured as described above is applied with power, a current flows in the coil 60 of the stator 110 provided on the inner circumferential surface of the housing 100 to form a magnetic field. The rotatable shaft 40 and the rotor 120 are rotatably coupled to each other, and magnetic energy of the magnet 70 forms a magnetic circuit through a gap between the stator 110 and the rotor 120, that is, an air gap. . This principle is to generate a rotational force on the rotor according to the principle that the pole by the magnet 70 is supplied with power and pulled and repel each other with the pole formed on the stator 110 coil 60 through which current flows.

In the conventional brushless motor operating as described above, the encoder cover 10 is inferior in airtightness after the fastening portion (end portion) of the encoder cover 10 is fastened in a horizontal relationship when engaging the rear bracket 30. There was a problem that the fastening state is very weak. As a result, tremors caused by the rotation of the motor resulted in a poor fastening state, which resulted in poor performance.

The present invention is designed to solve the above problems, the present invention is to improve the shape of the fastening portion of the encoder cover, to have a constant inclination to the fastening portion of the encoder cover to maintain airtightness with the rear bracket and improve the fastening force The purpose is to reduce the performance of the motor by protecting the encoder optimally.

1 is an encoder configuration of a motor with a conventional encoder cover

2 is a cross-sectional view of a conventional encoder cover

3 is a block diagram of a motor with an encoder cover of the present invention

4 is a cross-sectional view of the encoder cover of the present invention

Explanation of symbols on the main parts of the drawings

10: encoder cover 20: encoder

30: rear bracket 40: rotation axis

50: front bracket 60: coil

70 magnet 80 cooling fan

90: ball bearing 100: housing

110: stator 120: rotor

130: slope

In order to achieve the above object, the present invention provides a housing, a stator press-fitted into the housing, a coil wound around, a rotating shaft penetrating and installed inside the stator, a plurality of magnets pressed into the rotating shaft, and provided at an end of the rotating shaft. In the motor provided with the encoder to be installed, the encoder cover for protecting the encoder, the encoder cover is characterized in that the inclination at the end of the encoder cover.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

The configuration diagram of the motor with the encoder cover of the motor according to the present invention is as described in the prior art except that a predetermined slope 130 is given to the fastening portion of the encoder cover 10 as shown in FIG.

Figure 4 shows a cross-sectional view of the encoder cover 10 of the present invention was configured in a separate drawing to help understanding.

When the encoder cover 10 is coupled to the rear bracket 30 as shown in FIGS. 3 and 4, the encoder cover 10 is elastically deformed through the clamping force of the bolt through the fastening by the bolt. The positional movement is coupled until the surface of the bracket 30 is matched.

By improving the shape of the fastening part of the encoder cover, it has a certain inclination to the fastening part of the encoder cover to maintain the airtightness with the rear bracket and improve the fastening force to protect the encoder in an optimal state to improve the motor operating environment. Have

Claims (1)

Pressed into the housing, the stator yoke 110 is pressed into the housing 100, the coil 60 is wound, the rotary shaft 40, the rotary shaft 40 is penetrated and installed through the inside of the yoke 110 In the motor provided with a plurality of magnets 70, the encoder 20 is installed at the end of the rotary shaft, the encoder cover 10 for protecting the encoder 20, The structure of the encoder cover 10, characterized in that the inclination 130 is placed on the end of the encoder cover (10).