CN218678734U - External rotor motor with encoder - Google Patents

Abstract

The utility model relates to a take external rotor electric machine of encoder, including motor body part, encoder part and brake part, motor body part include front end housing, motor casing, stator core and rotor casing, front end housing and rotor casing install respectively and form first cavity after on motor casing, form first cavity between stator core and the motor casing, the encoder part is arranged in first cavity. Compared with the prior art, the utility model has the advantages of motor performance has effectively been promoted.

Description

External rotor motor with encoder

Technical Field

The utility model relates to an external rotor electric machine especially relates to an external rotor electric machine of taking encoder.

Background

The existing external rotor motor with the encoder comprises an encoder part, a motor body part and a brake part, wherein the encoder part comprises an encoder PCB and a coded disc, the motor body part comprises a stator component, a rotor component and a bearing supporting part, the brake part comprises an electromagnet, a pressure disc and a brake disc, the bearing supporting part is divided into an upper part and a lower part, the middle part is separated by a base, an end cover is arranged above and below the base to seal the motor body part, a raised shaft sleeve is arranged above the base, the stator component is fixed on the shaft sleeve, the rotor component comprises a machine shell, a rotating shaft, a magnetic ring, a rotor shaft sleeve, a switching plate and the encoder coded disc, the rotor component is connected with the rotating shaft through the machine shell, the encoder PCB is arranged below the rotor component, a motor power line is prevented from passing through the groove coded disc of the shaft sleeve, and the encoder PCB is welded.

Because the code wheel is fixed in the rotor subassembly below, fixed mode is complicated, and fixed back reliability is low, and code wheel and encoder PCB need certain clearance, consequently compressed stator module space, and the motor performance is lower relatively. Dust generated by friction of the band-type brake below the end cover is easy to pollute the encoder and the bearing, control signal abnormity is caused, or abnormal sound of the bearing is caused, the service life of the bearing is shortened, and normal operation of the motor is influenced. The stator has extremely small wire passing space, complex wire passing protection and low reliability in operation.

Therefore, the problems that in the prior art, an encoder is difficult to mount, low in mounting reliability and insufficient in motor performance are solved, a clean working space is provided for the encoder, pollution caused by friction dust of a band-type brake is avoided, and the technical problem to be solved is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an external rotor electric machine of taking encoder in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized through the following technical scheme:

according to the utility model discloses an aspect provides a take external rotor electric machine of encoder, including motor body part, encoder part and brake part, motor body part include front end housing, motor casing, stator core and rotor casing, front end housing and rotor casing install respectively and form first cavity after on motor casing, form the second cavity between stator core and the motor casing, the first cavity is arranged in to the encoder part.

As a preferable technical scheme, the encoder part comprises an encoder PCB and an encoder code wheel, and the encoder code wheel is arranged above the rotor casing.

As a preferred technical scheme, the encoder PCB is arranged on the back surface of the front end cover.

As a preferable technical scheme, the outgoing line of the encoder PCB is led out from an opening below the front end cover.

As a preferred technical scheme, the outgoing line is led out in a pin form.

As the preferred technical scheme, the motor body part also comprises a base and a rotating shaft, and the brake part is arranged below the base.

According to the preferable technical scheme, the brake part comprises an electromagnet, a pressure disc, a brake end cover and a brake shaft sleeve, the electromagnet is arranged below the base and is used for sucking the pressure disc, the brake disc and the brake shaft sleeve are arranged on the rotating shaft, and the brake end cover is connected with the electromagnet.

As a preferable technical scheme, the brake end cover is connected with the electromagnet through a screw.

As a preferable technical scheme, the encoder part and the brake part are respectively arranged in a front end cover and a rear end cover of the motor body part.

As a preferred technical scheme, the motor body part also comprises a power line PCB, and an outgoing line of the power line PCB is led out through the base.

Compared with the prior art, the utility model has the advantages of it is following:

1) The utility model discloses the motor performance has effectively been promoted. The encoder is arranged in the first cavity, so that the axial length of a stator core of the motor is increased, and the performance of the motor is improved.

2) The utility model discloses the assembly degree of difficulty reduces by a wide margin. The original encoder is very big in installation difficulty, and the code wheel fixed mode is complicated, and the whole assembly flow of motor is complicated and unreliable. The utility model discloses a place the encoder in first cavity, realized the modularization, need not increase extra encoder mounted position, the assembly is simple, and interchangeability is high, and maintainability is good, and economic nature and reliability improve greatly.

3) The utility model discloses the radiating effect is excellent. The control board is installed below the front end cover, heat generated by the control board is directly contacted with air through the front end cover and is dissipated into the air, so that the good heat dissipation effect of the power device on the control board is ensured, and the heat dissipation requirement during high-power use is met.

4) The utility model discloses dustproof effect is excellent. The encoder is far away from the band-type brake and is arranged, has avoided the contact of band-type brake dust with the encoder, prevents that the encoder from because of damage and the signal influence that electrically conductive dust caused, can make the long-term stable operation of motor.

5) The utility model discloses the lead-out wire phase separation of the lead-out wire of encoder and stator winding avoids the too much or too big risk that arouses shell body deformation of trompil in same position.

Drawings

Fig. 1 is a schematic structural diagram of a conventional external rotor motor with an encoder;

fig. 2 is a schematic structural view of the external rotor motor with encoder according to the present invention;

fig. 3 is a schematic diagram comparing the external rotor electric machine of the present invention with the existing external rotor electric machine.

Wherein a is the existing motor body part; a1, an existing front end cover; a2, an existing bearing; a3, the existing rotor shell; a4, an existing shaft sleeve; a5, existing magnetic steel; a6, an existing iron core; a7, an existing iron core shaft sleeve; a8, an existing base; a9, an existing rear end cover; a10, an existing rotating shaft; a11, the existing adapter plate;

b is the existing encoder section; b1, an existing encoder PCB; b2, encoding a disc of the existing encoder;

c is the existing brake part; c1, the existing electromagnet; c2, an existing pressure disc; c3, existing brake discs; c4, the existing brake end cover; c5, the existing brake shaft sleeve;

100 is a motor body part; 101. a front end cover; 102. a front bearing; 103. a motor housing; 104. a rear bearing; 105. a wave spring; 106. a rotating shaft; 107. a rear end cap; 108. magnetic steel; 109. a stator core; 110. a rotor case; 111. a power line PCB; 112. a base;

200 is an encoder portion; 201. an encoder PCB; 202. a code disc of an encoder;

300 is a brake part; 301. an electromagnet; 302. a pressure disc; 303. a brake disc; 304. a brake end cover; 305. a brake shaft sleeve;

k1 is a first cavity; k2 is a second cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in fig. 2 and 3, the present invention relates to an external rotor motor with an encoder, including a motor body portion 100, an encoder portion 200 and a brake portion 300, and is characterized in that the motor body portion 100 includes a front end cover 101, a motor housing 103, a stator core 109 and a rotor housing 110, the front end cover 101 and the rotor housing 110 are respectively installed on the motor housing 103 to form a first cavity K1, a second cavity K2 is formed between the stator core 109 and the motor housing 103, and the encoder portion 200 is disposed in the first cavity K1. The utility model discloses owing to removed the keysets (fig. 1 existing structure), encoder part 200 include encoder PCB201 and encoder code wheel 202, encoder code wheel 202 arrange rotor casing 110 top in, consequently reduced the second cavity height, increased stator core 109's length, increase substantially the electromagnetism space, promote the performance of motor. The original encoder is very big in installation difficulty, and the code wheel fixed mode is complicated, and the whole assembly flow of motor is complicated and unreliable. The utility model discloses a place the encoder in first cavity, realized the modularization, need not increase extra encoder mounted position, the assembly is simple, and interchangeability is high, and maintainability is good, and economic nature and reliability improve greatly.

The encoder PCB201 is mounted on the back of the front cover 101. Encoder PCB 201's lead-out wire draw forth from the trompil in front end housing 101 below, the lead-out wire adopt the contact pin form to draw forth, install the control panel in the front end housing below, the heat that the control panel produced is by the front end housing direct contact in the air, gives off in the air, has guaranteed that the power device radiating effect is good on the control panel, satisfies the heat dissipation requirement when high power uses. The signal line is separated from the power line, so that the interference to the encoder signal is avoided.

The motor body part 100 further includes a base 112 and a rotating shaft 106, and the brake part 300 is installed below the base 112. The brake part 300 comprises an electromagnet 301, a pressure disc 302, a brake disc 303, a brake end cover 304 and a brake shaft sleeve 305, wherein the electromagnet 301 is arranged below the base 112, when the electrified motor runs, the electromagnet 301 sucks the pressure disc 302, the brake disc 303 and the brake shaft sleeve 305 are arranged on the rotating shaft 106 and rotate along with the rotating shaft, and the brake end cover 304 is connected with the electromagnet 301. The brake end cap 304 is connected with the electromagnet 301 through a screw.

The encoder part 200 and the brake part 300 are respectively arranged in the front end cover 101 and the rear end cover 107 of the motor body part 100. The encoder is far away from the brake part and is arranged, so that the contact between dust of the brake part and the encoder is avoided, the damage and the signal influence of the encoder caused by conductive dust are prevented, and the motor can be stably operated for a long time.

The motor body part also comprises a power line PCB111, and an outgoing line of the power line PCB111 is led out through a base 112. The utility model discloses the lead-out wire phase separation of the lead-out wire of encoder and stator winding avoids the too much or too big risk that arouses shell body deformation of trompil in same position.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The outer rotor motor with the encoder comprises a motor body part (100), an encoder part (200) and a brake part (300), and is characterized in that the motor body part (100) comprises a front end cover (101), a motor shell (103), a stator core (109) and a rotor shell (110), the front end cover (101) and the rotor shell (110) are respectively installed on the motor shell (103) to form a first cavity (K1), a second cavity (K2) is formed between the stator core (109) and the motor shell (103), and the encoder part (200) is arranged in the first cavity (K1).

2. The external rotor motor with the encoder as claimed in claim 1, wherein the encoder portion (200) includes an encoder PCB (201) and an encoder code wheel (202), and the encoder code wheel (202) is disposed above the rotor housing (110).

3. The external rotor motor with the encoder as claimed in claim 2, wherein the encoder PCB (201) is mounted on the back of the front end cover (101).

4. The external rotor electric machine with the encoder as claimed in claim 2 or 3, wherein the outgoing line of the encoder PCB (201) is led out from the opening below the front end cover (101).

5. The external rotor motor with the encoder as claimed in claim 4, wherein the lead-out wires are led out in the form of pins.

6. The external rotor motor with the encoder as claimed in claim 1, wherein the motor body portion (100) further comprises a base (112) and a rotating shaft (106), and the brake portion (300) is installed below the base (112).

7. The external rotor motor with the encoder as claimed in claim 6, wherein the brake part (300) comprises an electromagnet (301), a pressure disc (302), a brake disc (303), a brake end cap (304) and a brake shaft sleeve (305), the electromagnet (301) is installed below the base (112), the electromagnet (301) sucks the pressure disc (302), the brake disc (303) and the brake shaft sleeve (305) are installed on the rotating shaft (106), and the brake end cap (304) is connected with the electromagnet (301).

8. The external rotor electric machine with the encoder as claimed in claim 7, wherein the brake end cap (304) is connected with the electromagnet (301) by a screw.

9. The external rotor motor with the encoder as claimed in claim 1, wherein the encoder portion (200) and the brake portion (300) are respectively disposed in the front end cap (101) and the rear end cap (107) of the motor body portion (100).

10. The external rotor motor with the encoder as claimed in claim 6, wherein the motor body portion further comprises a power line PCB (111), and an outgoing line of the power line PCB (111) is led out through the base (112).

Images