CN211481128U

CN211481128U - Outer rotor brushless motor non-hollow encoder mounting structure

Info

Publication number: CN211481128U
Application number: CN202020383178.XU
Authority: CN
Inventors: 陈阳
Original assignee: Shenzhen Vmmore Control Technology Co ltd
Current assignee: Shenzhen Vmmore Control Technology Co ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-09-11
Anticipated expiration: 2030-03-23

Abstract

The utility model discloses a non-cavity encoder mounting structure of external rotor brushless motor, external rotor brushless motor is including stator base, rotor subassembly and output shaft, the output shaft passes in proper order the stator base with the center department of rotor subassembly, and by the rotor subassembly drives the output shaft rotates, be fixed with the supporting seat on the stator base, the output shaft passes the supporting seat, just the output shaft can be relative the supporting seat rotates, the outside of supporting seat is equipped with year code piece, year code piece with output shaft fixed connection, be fixed with encoder PCB board on the supporting seat, the collection end of encoder PCB board with year code piece sets up relatively, the collection end of encoder PCB board is through responding to the pivoted year code piece and producing the encoder signal. The utility model discloses can realize that non-cavity encoder and external rotor brushless motor match each other, simple structure, save the cost simultaneously, encoder data is accurate reliable.

Description

Outer rotor brushless motor non-hollow encoder mounting structure

Technical Field

The utility model relates to an external rotor brushless motor especially relates to an external rotor brushless motor non-cavity encoder mounting structure.

Background

In the prior art, a common rotary brushless motor has two basic structures, namely an inner rotor and an outer rotor, wherein a stator coil of the inner rotor brushless motor is arranged outside, a permanent magnet rotor is arranged inside, and when the motor rotates, only an output shaft rotates outside; and the brushless motor with the outer rotor is opposite to the brushless motor with the outer rotor, the stator coil is arranged inside, the permanent magnet rotor is arranged outside, and when the motor rotates, the whole motor shell except the mounting flange and the output shaft rotate.

In order to improve the control performance of the motor, an encoder needs to be mounted on the motor and used for feeding back the position of the rotor, so that a code carrying device such as a code disc or a magnet of the encoder needs to be fixed with the rotor of the motor to realize synchronous rotation. For the inner rotor brushless motor, the encoder body can be conveniently installed on the rear end cover of the motor. However, for the external rotor brushless motor, please refer to fig. 1, the stator base 1 for being fixedly assembled with other mechanisms is fixed, and the rotor assembly 2 and the output shaft 3 are both rotating, such a motor generally needs to match with a hollow encoder with higher cost, and cannot mount a non-hollow encoder, so that the mounting requirement and the design requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to prior art's not enough, provide one kind and can realize that non-cavity encoder and external rotor brushless motor match each other, simple structure, cost-effective, encoder data are accurate reliable simultaneously, and then satisfy the mounting structure of installation needs and designing requirement.

In order to solve the technical problem, the utility model adopts the following technical scheme.

The utility model provides an outer rotor brushless motor non-cavity encoder mounting structure, outer rotor brushless motor is including stator base, rotor subassembly and output shaft, the output shaft passes in proper order the stator base with the center department of rotor subassembly, and by the rotor subassembly drives the output shaft rotates, be fixed with the supporting seat on the stator base, the output shaft passes the supporting seat, just the output shaft can be relative the supporting seat rotates, the outside of supporting seat is equipped with carries the sign indicating number piece, carry the sign indicating number piece with output shaft fixed connection, be fixed with encoder PCB board on the supporting seat, the collection end of encoder PCB board with carry the sign indicating number piece and set up relatively, the collection end of encoder PCB board is through response pivoted carry the sign indicating number piece and produce the encoder signal.

Preferably, a flange surface is formed at one end of the stator base, which faces away from the rotor assembly, and the support seat is fixedly connected with the flange surface.

Preferably, the support seat is plate-shaped.

Preferably, two fastening screws penetrate through the supporting seat and are screwed with the threaded holes in the flange face.

Preferably, the carrier piece is including the magnet seat, the magnet seat with the coaxial setting of output shaft and the two fixed connection, inlay on the magnet seat and be equipped with magnet, magnet with the collection end of encoder PCB board sets up relatively.

Preferably, the magnet base is columnar, a jack is formed in one end, facing the output shaft, of the magnet base, and the output shaft is inserted into the jack and fixedly connected with the jack.

Preferably, a bayonet is arranged on the end face of the magnet seat, and the magnet is embedded in the bayonet.

Preferably, two upright columns are fixed between the supporting seat and the encoder PCB, and two ends of each upright column are respectively fixedly connected with the supporting seat and the encoder PCB.

Preferably, two first screws penetrate through the supporting seat and are fixed with the first ends of the two stand columns in a threaded mode respectively, two second screws penetrate through the encoder PCB and are fixed with the second ends of the two stand columns in a threaded mode respectively.

Preferably, the gap between the collection end of the encoder PCB and the magnet is 1mm

The utility model discloses an among the non-cavity encoder mounting structure of external rotor brushless motor stator base is last to have set up the supporting seat, utilizes the supporting seat is installed fixedly to encoder PCB board, will be used for realizing that response complex carries a yard piece such as code wheel, magnet to be fixed in simultaneously on the output shaft, work as output shaft moves during operation carry a yard piece synchronous revolution, through encoder PCB board with carry the response cooperation of yard piece and realize encoder data acquisition. Meanwhile, the output shaft, the code carrying piece and the encoder PCB form a basic structure of the non-hollow encoder. Based on the structure and the principle, the utility model discloses realized that non-cavity encoder and external rotor brushless motor match each other betterly, saved the encoder cost greatly, simultaneously the utility model discloses simple structure can guarantee encoder PCB board is accurate exports encoder data reliably, and then has satisfied the installation needs and the designing requirement of external rotor brushless motor collocation non-cavity encoder.

Drawings

Fig. 1 is a perspective view of an outer rotor brushless motor;

FIG. 2 is a first perspective view of the outer rotor brushless motor and the non-hollow encoder;

FIG. 3 is a second perspective view of the outer rotor brushless motor and the non-hollow encoder;

FIG. 4 is a partially exploded view of the outer rotor brushless motor and the non-hollow encoder;

FIG. 5 is a partially exploded view of the outer rotor brushless motor and the non-hollow encoder;

fig. 6 is a sectional view of the outer rotor brushless motor and the non-hollow encoder.

Detailed Description

The present invention will be described in more detail with reference to the accompanying drawings and examples.

The utility model discloses a non-hollow encoder mounting structure of an external rotor brushless motor, which is combined with the structure shown in figures 2 to 6, the outer rotor brushless motor comprises a stator base 1, a rotor component 2 and an output shaft 3, wherein the output shaft 3 sequentially penetrates through the centers of the stator base 1 and the rotor component 2, the rotor assembly 2 drives the output shaft 3 to rotate, a supporting seat 4 is fixed on the stator base 1, the output shaft 3 passes through the supporting seat 4, the output shaft 3 can rotate relative to the supporting seat 4, a code carrying piece 9 is arranged on the outer side of the supporting seat 4, the code carrying piece 9 is fixedly connected with the output shaft 3, the support seat 4 is fixed with a coder PCB 6, the collection end of encoder PCB board 6 with carry the relative setting of sign indicating number piece 9, the collection end of encoder PCB board 6 is through response pivoted carry the sign indicating number piece 9 and produce the encoder signal.

In the structure, the stator base 1 is provided with the supporting seat 4, the supporting seat 4 is utilized to install and fix the encoder PCB 6, meanwhile, the code carrying piece 9 used for realizing induction matching, such as a code disc, a magnet and the like, is fixed on the output shaft 3, when the output shaft 3 runs, the code carrying piece 9 is driven to synchronously rotate, the encoder data acquisition is realized through the induction matching of the encoder PCB 6 and the code carrying piece 9, and meanwhile, the output shaft 3, the code carrying piece 9 and the encoder PCB 6 form the basic structure of the non-hollow encoder. Based on the structure and the principle, the utility model discloses realized that non-cavity encoder and external rotor brushless motor match each other betterly, saved the encoder cost greatly, simultaneously the utility model discloses simple structure can guarantee encoder PCB 6 accurate output encoder data reliably, and then satisfied the installation needs and the designing requirement of external rotor brushless motor collocation non-cavity encoder.

For convenience of assembly, in this embodiment, a flange surface 10 is formed at an end of the stator base 1 facing away from the rotor assembly 2, and the support seat 4 is fixedly connected to the flange surface 10.

Preferably, the support seat 4 is plate-shaped.

Furthermore, two fastening screws 40 are arranged on the support seat 4 in a penetrating manner, and the fastening screws 40 are mutually screwed with the threaded holes 11 on the flange surface 10.

Regarding the concrete composition structure of code carrier 9, take magnetic encoder as an example, in this embodiment, code carrier 9 includes magnet seat 5, magnet seat 5 with output shaft 3 coaxial arrangement and both fixed connection, be equipped with magnet 7 on the magnet seat 5, magnet 7 with the acquisition end of encoder PCB board 6 sets up relatively.

Further, the magnet base 5 is columnar, one end of the magnet base 5 facing the output shaft 3 is provided with a jack 50, and the output shaft 3 is inserted into the jack 50 and is fixedly connected with the jack.

In this embodiment, on the basis of the insertion, a bayonet 51 is opened on an end surface 52 of the magnet holder 5, and the magnet 7 is embedded in the bayonet 51.

In addition, a jackscrew may be provided on the magnet holder 5, and the fastening relationship between the magnet holder 5 and the output shaft 3 may be further enhanced by the jackscrew.

In order to better support and fix the encoder PCB 6, in this embodiment, the support seat 4 and the encoder PCB 6 are fixed with two columns 8 therebetween, and two ends of each column 8 are respectively fixedly connected with the support seat 4 and the encoder PCB 6.

Further, two first screws 80 penetrate through the support seat 4, the two first screws 80 are respectively screwed and fixed with the first ends of the two upright posts 8, two second screws 81 penetrate through the encoder PCB 6, and the two second screws 81 are respectively screwed and fixed with the second ends of the two upright posts 8.

Preferably, the gap between the collecting end of the encoder PCB 6 and the magnet 7 is 1 mm. The collecting end of the encoder PCB 6 is specifically a magnetic sensor for sensing the magnet 7.

The above embodiment describes a structure of a non-hollow magnetic encoder, wherein the code carrier 9 includes the magnet 7, and the magnetic encoder data acquisition is realized through the magnetic induction cooperation of the acquisition end of the encoder PCB 6 and the magnet 7. However, the structure is not limited to this in the practical application process, and according to the actual needs, a structure of a non-hollow photoelectric encoder may also be adopted, specifically, the code carrying member 9 is designed as a code disc with a hollow grid, the collecting end of the encoder PCB board 6 is designed as a photoelectric sensing device, and the photoelectric encoder data collection is realized through the cooperation of the photoelectric sensing device and the hollow code disc. Of course, except for magnetic induction and photoelectric induction, other induction modes capable of generating encoder data may be replaced, and whatever replacement mode is adopted, all belong to the protection scope of the present invention.

The above is only the embodiment of the present invention, and is not intended to limit the present invention, and all modifications, equivalent replacements or improvements made within the technical scope of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a non-cavity encoder mounting structure of outer rotor brushless motor, outer rotor brushless motor is including stator base (1), rotor subassembly (2) and output shaft (3), output shaft (3) pass in proper order stator base (1) with the center department of rotor subassembly (2), and drive by rotor subassembly (2) output shaft (3) rotate, characterized in that, be fixed with supporting seat (4) on stator base (1), output shaft (3) pass supporting seat (4), and output shaft (3) can rotate relative to supporting seat (4), the outside of supporting seat (4) is equipped with carries the sign indicating number piece (9), carry the sign indicating number piece (9) with output shaft (3) fixed connection, be fixed with encoder PCB board (6) on supporting seat (4), the collection end of encoder PCB board (6) with carry the sign indicating number piece (9) and set up relatively, the collecting end of the encoder PCB (6) generates an encoder signal by sensing the rotating code carrier (9).

2. The external rotor brushless motor non-hollow encoder mounting structure according to claim 1, wherein a flange surface (10) is formed at an end of the stator base (1) facing away from the rotor assembly (2), and the support base (4) is fixedly connected with the flange surface (10).

3. The external rotor brushless motor non-hollow encoder mounting structure of claim 2, wherein the supporting seat (4) is plate-shaped.

4. The external rotor brushless motor non-hollow encoder mounting structure according to claim 3, wherein two fastening screws (40) are inserted into the supporting seat (4), and the fastening screws (40) are screwed with the threaded holes (11) on the flange surface (10).

5. The external rotor brushless motor non-hollow encoder installation structure of claim 1, wherein the code carrier (9) comprises a magnet base (5), the magnet base (5) and the output shaft (3) are coaxially arranged and fixedly connected, a magnet (7) is embedded on the magnet base (5), and the magnet (7) is arranged opposite to the collection end of the encoder PCB (6).

6. The external rotor brushless motor non-hollow encoder mounting structure according to claim 5, wherein the magnet holder (5) is cylindrical, an insertion hole (50) is formed at one end of the magnet holder (5) facing the output shaft (3), and the output shaft (3) is inserted into the insertion hole (50) and is fixedly connected to the insertion hole.

7. The external rotor brushless motor non-hollow encoder mounting structure according to claim 5, wherein a bayonet (51) is formed on an end surface (52) of the magnet holder (5), and the magnet (7) is embedded in the bayonet (51).

8. The external rotor brushless motor non-hollow encoder installation structure of claim 1, wherein two columns (8) are fixed between the support base (4) and the encoder PCB (6), and two ends of the column (8) are respectively fixedly connected with the support base (4) and the encoder PCB (6).

9. The external rotor brushless motor non-hollow encoder installation structure according to claim 8, wherein two first screws (80) are inserted into the support base (4), the two first screws (80) are screwed and fixed to first ends of the two columns (8), respectively, and two second screws (81) are inserted into the encoder PCB (6), and the two second screws (81) are screwed and fixed to second ends of the two columns (8), respectively.

10. The external rotor brushless motor non-hollow encoder installation structure of claim 5, wherein a gap between the collection end of the encoder PCB board (6) and the magnet (7) is 1 mm.