CN210093060U

CN210093060U - Magnetic encoder for motor

Info

Publication number: CN210093060U
Application number: CN201921306748.9U
Authority: CN
Inventors: 周志亮; 卢胜涛
Original assignee: Moto (suzhou) Electromechanical Technology Co Ltd
Current assignee: Moto (suzhou) Electromechanical Technology Co Ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-02-18
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses a magnetic encoder for motor, include: the motor comprises a shell fastened on a rear end cover of a motor, wherein an accommodating cavity is formed in the shell, one end of a motor shaft extends into the accommodating cavity, a circuit board is fastened in the accommodating cavity, a Hall chip is arranged on the circuit board, a copper sleeve is fastened on the end part of the motor shaft extending into the accommodating cavity, and a magnet block arranged opposite to the Hall chip is fastened on the copper sleeve; the copper bush is in a hollow cylinder shape, the hollow cavity of the copper bush axially penetrates through the copper bush, and the hollow cavity of the copper bush comprises a first cylindrical cavity used for containing the end part of the motor shaft, and a second cylindrical cavity which is connected with the first cylindrical cavity and is used for containing the magnet block. The magnetic encoder for the motor has the advantages of simple structure and convenience in installation.

Description

Magnetic encoder for motor

Technical Field

The utility model relates to the technical field of electric machine, especially, relate to magnetic encoder for motor.

Background

An encoder is a device that compiles, converts, and converts signals (e.g., a bit stream) or data into a form of signals that can be communicated, transmitted, and stored, and typically converts angular or linear displacements into electrical signals. The magnetic encoder has the advantages of small volume, low cost and super-strong environmental adaptability (dust resistance and vibration resistance), and is widely applied to the motor. The existing magnetic encoder for the motor has the defects of complex structure and inconvenient installation, so that a magnetic encoder for the motor needs to be researched.

SUMMERY OF THE UTILITY MODEL

To the weak point that exists in the above-mentioned technique, the utility model provides a simple structure, simple to operate's magnetic encoder for motor.

The utility model provides a technical scheme that its technical problem adopted is: a magnetic encoder for an electrical machine, comprising: the motor comprises a shell fastened on a rear end cover of a motor, wherein an accommodating cavity is formed in the shell, one end of a motor shaft extends into the accommodating cavity, a circuit board is fastened in the accommodating cavity, a Hall chip is arranged on the circuit board, a copper sleeve is fastened on the end part of the motor shaft extending into the accommodating cavity, and a magnet block arranged opposite to the Hall chip is fastened on the copper sleeve; the copper bush is in a hollow cylinder shape, the hollow cavity of the copper bush axially penetrates through the copper bush, and the hollow cavity of the copper bush comprises a first cylindrical cavity used for containing the end part of the motor shaft, and a second cylindrical cavity which is connected with the first cylindrical cavity and is used for containing the magnet block.

Preferably, a limiting ring for limiting the position of the circuit board is formed on the circumferential cavity wall of the accommodating cavity of the housing.

Preferably, a pair of convex blocks are formed on the inner ring wall of the limiting ring, and threaded holes for mounting the circuit board are formed in the convex blocks.

Preferably, the lugs are arranged 180 ° apart.

Preferably, the circuit board is further provided with a connector, a cable plug is inserted into the connector, and an opening through which a cable on the cable plug passes is formed in the circumferential side wall of the shell.

Preferably, the magnet block and the hall chip are located on an extension line of the same straight line, wherein the hall chip is located in the center of the circuit board, and a preset gap exists between the hall chip and the magnet block.

Preferably, the first cylindrical chamber and the second cylindrical chamber are coaxially arranged, and the aperture of the second cylindrical chamber is smaller than that of the first cylindrical chamber.

Preferably, the magnet block is connected in the second cylindrical chamber through glue.

Preferably, a marking groove is formed on an outer end surface of the housing.

Compared with the prior art, the utility model, its beneficial effect is: the utility model provides a magnetic encoder for motor, the shaping has the holding chamber on its casing, and the circuit board sets up in the holding intracavity of casing, and the direct cover of copper sheathing is put on the tip of motor shaft, has simple structure, simple to operate's advantage.

Drawings

Fig. 1 is a schematic structural view of a magnetic encoder for a motor according to the present invention;

fig. 2 is a schematic view of an exploded structure of a magnetic encoder for a motor according to the present invention;

fig. 3 is a schematic view of a sectional structure of a magnetic encoder for a motor according to the present invention;

fig. 4 is one of the structural schematic diagrams of the housing of the present invention;

fig. 5 is a second schematic structural view of the housing of the present invention;

FIG. 6 is a schematic structural view of the copper sheath of the present invention;

fig. 7 is a schematic structural diagram of the circuit board of the present invention.

In the figure: 10. a housing; 11. a limiting ring; 12. a bump; 13. an opening; 14. marking a groove; 20. a circuit board; 21. a Hall chip; 22. a joint; 30. a copper sleeve; 40. a motor shaft; 50. a magnet block; 60. and a cable plug.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

As shown in fig. 1 to 7, the utility model provides a magnetic encoder for motor, include: a housing 10 fastened to the rear end cover of the motor, wherein an accommodating cavity is formed in the housing 10, one end of a motor shaft 40 extends into the accommodating cavity, as shown in fig. 2 and 7, a circuit board 20 is fastened in the accommodating cavity, a hall chip 21 is disposed on the circuit board 20, a copper sleeve 30 is fastened to the end of the motor shaft 40 extending into the accommodating cavity, and a magnet block 50 disposed opposite to the hall chip 21 is fastened to the copper sleeve 30; as shown in fig. 3 and 6, the copper sleeve 30 is a hollow cylinder, the hollow cavity of the copper sleeve 30 axially penetrates through the copper sleeve 30, and the hollow cavity of the copper sleeve 30 includes a first cylindrical cavity for accommodating the end of the motor shaft 40 and a second cylindrical cavity connected to the first cylindrical cavity and used for accommodating the magnet block 50.

As an embodiment of the present disclosure, the range of the number of lines of the hall chip 21 is: 32 lines to 2500 lines, and the Hall chip 21 is also provided with a zero position.

As an embodiment of the present invention, as shown in fig. 4, a limiting ring 11 for limiting the position of the circuit board 20 is formed on a circumferential cavity wall of the accommodating cavity of the housing 10.

As an embodiment of the present invention, as shown in fig. 4, a pair of protrusions 12 is formed on an inner wall of the limiting ring 11, and the protrusions 12 are provided with threaded holes for mounting the circuit board 20.

As an embodiment of the present solution, as shown in fig. 4, the bumps 12 are arranged 180 ° apart.

As an embodiment of the present disclosure, as shown in fig. 4 and 7, a connector 22 is further disposed on the circuit board 20, a cable plug 60 is inserted into the connector 22, and an opening 13 through which a cable on the cable plug 60 passes is disposed on a circumferential sidewall of the housing 10.

As an embodiment of the present disclosure, as shown in fig. 2 and 7, the magnet block 50 and the hall chip 21 are located on an extension line of a same straight line, wherein the hall chip 21 is located at the center of the circuit board 20, and a predetermined gap exists between the hall chip 21 and the magnet block 50.

As an embodiment of the present disclosure, as shown in fig. 6, the first cylindrical chamber and the second cylindrical chamber are coaxially disposed, and a pore diameter of the second cylindrical chamber is smaller than a pore diameter of the first cylindrical chamber.

As an embodiment of the present solution, the magnet block 50 is connected in the second cylindrical chamber by glue.

As an embodiment of this solution, as shown in fig. 5, a marking groove 14 is formed on an outer end surface of the housing 10.

While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application suitable for this invention, and further modifications may be readily made by those skilled in the art, and the invention is therefore not limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. A magnetic encoder for a motor, comprising: the motor comprises a shell (10) fastened on a rear end cover of the motor, wherein an accommodating cavity is formed in the shell (10), one end of a motor shaft (40) extends into the accommodating cavity, a circuit board (20) is fastened in the accommodating cavity, a Hall chip (21) is arranged on the circuit board (20), a copper sleeve (30) is fixedly arranged at the end part of the motor shaft (40) extending into the accommodating cavity, and a magnet block (50) opposite to the Hall chip (21) is fixedly arranged on the copper sleeve (30);

wherein, copper sheathing (30) are the cavity cylinder form, the well cavity axial of copper sheathing (30) runs through copper sheathing (30), the well cavity of copper sheathing (30) include one be used for the holding the first cylinder cavity of motor shaft (40) tip, one with first cylinder cavity links to each other and is used for the holding the second cylinder cavity of magnet piece (50).

2. The magnetic encoder for the motor according to claim 1, characterized in that a limiting ring (11) for limiting the position of the circuit board (20) is formed on the circumferential cavity wall of the accommodating cavity of the housing (10).

3. The magnetic encoder for the motor as claimed in claim 2, wherein the inner ring wall of the spacing ring (11) is formed with a pair of projections (12), and the projections (12) are provided with threaded holes for mounting the circuit board (20).

4. A magnetic encoder for an electrical machine according to claim 3, characterized in that the projections (12) are arranged 180 ° apart.

5. The magnetic encoder for the motor according to claim 1, wherein the circuit board (20) is further provided with a connector (22), a cable plug (60) is inserted into the connector (22), and an opening (13) for the cable of the cable plug (60) to pass through is formed in the circumferential side wall of the housing (10).

6. The magnetic encoder for the motor according to claim 1, wherein the magnet block (50) and the hall chip (21) are located on the same extension line, wherein the hall chip (21) is located at the center of the circuit board (20), and a predetermined gap is formed between the hall chip (21) and the magnet block (50).

7. The magnetic encoder for a motor of claim 1, wherein the first cylindrical chamber is disposed coaxially with the second cylindrical chamber, and the second cylindrical chamber has a smaller bore diameter than the first cylindrical chamber.

8. A magnetic encoder for an electrical machine according to claim 1, characterized in that the magnet block (50) is attached in the second cylindrical chamber by glue.

9. A magnetic encoder for an electrical machine according to claim 1, characterized in that the housing (10) is formed with a marking groove (14) on its outer end face.