CN219247647U

CN219247647U - Motor with encoder

Info

Publication number: CN219247647U
Application number: CN202320028072.1U
Authority: CN
Inventors: 尹涛; 马永超; 段龙; 邹锡挺
Original assignee: Delixi Hangzhou Inverter Co ltd
Current assignee: Delixi Hangzhou Inverter Co ltd
Priority date: 2023-01-03
Filing date: 2023-01-03
Publication date: 2023-06-23
Anticipated expiration: 2033-01-03

Abstract

The application relates to the technical field of encoders, and in particular relates to a motor with an encoder, which further comprises an electromagnetic head and a detection assembly, wherein the electromagnetic head is arranged on an output shaft of the motor, the detection assembly is arranged on one side, close to the electromagnetic head, of a shell, and when the output shaft of the motor rotates, the detection assembly can detect the rotation of the electromagnetic head and record the rotation times of the electromagnetic head. The utility model has the advantages of can detect the rotation of electromagnetism head through the magnetoelectric encoder that the detection component was equipped with thereby can detect the number of turns that the motor rotated in real time, and then the switching of control motor that can be accurate, further improve the effect of the control accuracy of motor.

Description

Motor with encoder

Technical Field

The application relates to the technical field of encoders, in particular to a motor with an encoder.

Background

An encoder is a device that compiles a signal, such as a bit stream or data, into a signal form for communication, transmission, and storage. An electromagnetic device capable of realizing electric energy conversion or transmission according to the law of electromagnetic induction is mainly used as a power source of electric appliances or various machines. The encoder is arranged in the motor, and the control precision of the motor is improved mainly by collecting the running state of the motor. In order to be able to improve the motor control accuracy, the conventional motor employs a photoelectric encoder that calculates the accuracy by scribing on a code wheel.

However, in practical application, for convenience in use, a motor with a smaller size is generally selected, and for a photoelectric encoder, the smaller size means that the code wheel is smaller, and further, the control accuracy of the motor is lower, so that the requirements of people cannot be met.

Disclosure of Invention

In order to improve the control precision of a motor and reduce the volume of an encoder, the application provides the motor with the encoder.

The application provides a motor with encoder adopts following technical scheme:

the motor with the encoder further comprises an electromagnetic head and a detection assembly, wherein the electromagnetic head is arranged on an output shaft of the motor, the detection assembly is arranged on one side, close to the electromagnetic head, of the shell, and when the output shaft of the motor rotates, the detection assembly can detect the rotation of the electromagnetic head and record the rotation times of the electromagnetic head.

Through adopting above-mentioned technical scheme, the output shaft synchronous rotation of electromagnetic head and motor, and then can make the rotation that the detection component can detect the electromagnetic head to can realize the accurate detection to the rotation number of turns of motor, and then improve the control accuracy of motor.

Optionally, the detection subassembly includes connection base, detection circuit board and is used for connecting the connection base with the connecting piece of casing, the connection base is located the casing is close to one side of electromagnetic head, just the connection base with the casing is followed the axial rotation of output shaft, detection circuit board locates the connection base is dorsad one side of casing.

Through adopting above-mentioned technical scheme, detection circuit board is connected through the casing of connection base with the motor, and through the slight rotation between connection base and the casing, can realize the positional relationship between electromagnetic head and the detection circuit board, and then improve the detection circuit board to the detection of electromagnetic head pivoted number of turns.

Optionally, the connection base is provided with a kidney slot, the connecting piece passes through the kidney slot and extends towards the casing, and the connecting piece is used for fixing the connection base with the casing.

Through adopting above-mentioned technical scheme, the connecting piece passes kidney-shaped groove and casing on the one hand and fixes, and on the other hand, the radial rotation of output shaft can be followed to the relative casing of connection base, and then can be more accurate regulation detect the positional relationship between piece and the electromagnetic head, further improves the control accuracy of motor.

Optionally, the connection base is provided with a placement area, the placement area is communicated with the inside of the shell, and the placement area is used for the rotation of the output shaft.

By adopting the technical scheme, the placement area is communicated with the inside of the shell, so that the output shaft can rotate in the placement area, and then the output shaft rotates towards the connecting base, and the detection assembly can conveniently detect the rotation of the electromagnetic head on the output shaft; on the other hand, place the district and can be convenient for dispel the heat, prevent when the motor operation, the temperature is too high, leads to the motor to damage.

Optionally, the detection circuit board includes a magneto-electric encoder for detecting rotation of the electromagnetic head.

By adopting the technical scheme, the magnetoelectric encoder can accurately receive the rotation of the electromagnetic head, and further can improve the control precision of the motor; in addition, the magneto-electric encoder is small in size and convenient to install, and the motor can be conveniently carried.

Optionally, the distance between the magnetoelectric encoder and the electromagnetic head is 0.8-1 mm.

By adopting the technical scheme, the magnetoelectric encoder can more accurately receive the rotation of the electromagnetic head, and the detection precision of the magnetoelectric encoder on the rotation of the electromagnetic head is further improved.

Optionally, the detection circuit board includes an external calibration interface, and the external calibration interface is used for correcting the positional relationship between the connection base and the electromagnetic head.

Through adopting above-mentioned technical scheme, the external calibration interface can adjust the positional relationship between the electromagnetic head and the magnetoelectric encoder to make the rotation that the magnetoelectric encoder can more accurate detect the electromagnetic head, when later stage detects, can make the magnetoelectric encoder higher to the rotation detection precision of electromagnetic head.

Optionally, the connection base is equipped with a plurality of spacing posts, spacing post is located connection base is towards one side of outside calibration interface, the detection circuit board is equipped with spacing hole, spacing post with spacing hole cooperation installation.

Through adopting above-mentioned technical scheme, spacing post and butt joint hole cooperation installation can make the positioning accuracy between detection circuit board and the connection base better, further makes the positional relationship between connection base and the output shaft more be convenient for detect circuit board to electromagnetic head pivoted detection.

Optionally, the connection base is an insulating layer made of plastic.

Through adopting above-mentioned technical scheme, connect the base and establish to the insulating layer, can prevent to electrically conduct, improve the detection precision of detecting the piece to the electromagnetic head.

In summary, the magneto-electric encoder arranged on the detection circuit board can detect the rotation of the electromagnetic head, so that the number of turns of the motor can be detected in real time, the number of turns of the motor can be further accurately or acquired, and the angle control precision of the motor is further improved; in addition, the magneto-electric encoder has small volume and high precision, overcomes some defects of the photoelectric encoder, and has the advantages of shock resistance, corrosion resistance, pollution resistance, high reliability and simpler structure; the magnetic braiding is used on products with low response time of the position accuracy, so that the size of the encoder is greatly reduced, and the production process is simpler and has more cost advantage.

Drawings

Fig. 1 is a schematic diagram of a motor with an encoder.

Fig. 2 is a structural cross-sectional view of a motor with an encoder.

Fig. 3 is a schematic diagram of the structure of the detecting assembly.

Reference numerals illustrate: 10. an output shaft; 20. a housing; 21. a cover body; 30. an electromagnetic head; 40. a detection assembly; 41. the base is connected; 411. a kidney-shaped groove; 412. a placement area; 413. a limit column; 42. a detection circuit board; 421. a magneto-electric encoder; 422. an external calibration interface; 423. a magnetic braiding plate; 424. a limiting hole; 43. and a connecting piece.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a motor with an encoder. Referring to fig. 1 and 2, the motor includes an output shaft 10 and a housing 20, the output shaft 10 being provided inside the housing 20. The motor further comprises an electromagnetic head 30 and a detection assembly 40, wherein the electromagnetic head 30 is arranged on the output shaft 10 of the motor, the detection assembly 40 is arranged on one side of the shell 20, which is close to the electromagnetic head 30, and when the output shaft 10 of the motor rotates, the detection assembly 40 can detect the rotation of the electromagnetic head 30 and record the rotation times of the electromagnetic head 30.

Here, a connection end is provided at an end of the output shaft 10 near the detection assembly 40, and the electromagnetic head 30 is mounted on the connection end of the output shaft 10. The casing 20 is equipped with the lid 21 towards detection subassembly 40 one side, and the lid 21 is seted up flutedly, makes things convenient for the connection end face of output shaft 10 to detect subassembly 40. Thereby causing the electromagnetic head 30 to face the detection assembly 40.

The detecting assembly 40 includes a connection base 41, a detecting circuit board 42, and a connecting member 43 for connecting the connection base 41 and the cover 21, wherein one side of the connection base 41 abuts against the cover 21, and the other side abuts against the detecting circuit board 42. The connector 43 fixes the connection base 41 and the cover 21, and the detection circuit board 42 is disposed on a side of the connection base 41 facing away from the housing 20.

The connection base 41 is an insulating layer made of plastic, the connection base 41 is provided with a waist-shaped groove 411 and a placement area 412, the placement area 412 is a groove formed in one side of the connection base 41 facing the output shaft 10, and the output shaft 10 rotates in the placement area 412.

Referring to fig. 3, the kidney-shaped slot 411 and the connecting pieces 43 are provided with two groups, and the cover 21 is provided with a connecting hole corresponding to one group of connecting pieces 43, and the connecting hole is communicated with the kidney-shaped slot 411 along the axial direction of the output shaft 10, so that one group of connecting pieces 43 can conveniently pass through the corresponding kidney-shaped slot 411 to be in threaded connection with the connecting hole of the cover 21. The other group of connecting pieces 43 passes through the corresponding waist-shaped slot 411 to be abutted against the cover body 21.

The connection base 41 is provided with a plurality of spacing posts 413, and spacing posts 413 are located to connect the one side of base 41 towards detection circuit board 42, and detection circuit board 42 is provided with spacing hole 424, and spacing posts 413 and spacing hole 424 cooperation installation are connected. In this embodiment, the limiting posts 413 are provided with 4 groups, and the corresponding limiting holes 424 are also provided with 4 groups.

The detection circuit board 42 is provided with a magnetoelectric encoder 421 and an electromagnetic head 30 aligned with the output shaft 10, and the distance between the magnetoelectric encoder 421 and the electromagnetic head 30 is 0.8-1 mm. The external calibration interface 422 is fixed to the detection circuit board 42 on one side and an external interface line end on the other side. The external calibration interface 422 is used for correcting the positional relationship between the connection base 41 and the electromagnetic head 30, so as to correct the positional relationship between the magneto-electric encoder 421 and the electromagnetic head 30.

In this embodiment, the magnetoelectric encoder 421 is MT6835, the MT6835 has 21-bit encoding precision, supports the communication between the SPI interface and the master MCU, and also supports the encoding or pulse output modes of ABZ, UVW and PWM modes, so that the number of rotations of the electromagnetic head 30 can be detected more accurately. In order to more precisely detect the rotation angle of the output shaft of the motor, a main control CPU is generally used to process the data acquired by the magnetoelectric encoder 421.

It should be noted that, the detection circuit board 42 further includes a magnetic plate 423, where the magnetic plate 423 is fixed on the connection base, and the magnetic plate 423 is disposed facing the placement area 412, and the magnetic plate 423 is used to provide a magnetic field parallel to the direction of the magneto-electric encoder 421. When the output shaft 10 of the motor rotates, the electromagnetic head 30 is further driven to cut a magnetic field parallel to the direction of the electromagnetic head 421 so that the electromagnetic head 421 senses a change of the magnetic field position of the electromagnetic head 30 mounted on the output shaft 10, the sensed change of the magnetic field position is converted into an angle signal, and then the electromagnetic head 421 sends the acquired angle signal to the main control CPU, and the main control CPU calculates the number of turns of the electromagnetic head 30 and records the number of turns.

The external calibration interface 422 is an external interface, and one end of the external calibration interface 422 is electrically connected to the inside of the magnetic braid 423. After the installation is completed, the rotation of the induction electromagnetic head 30 of the magnetoelectric encoder 421 needs to be corrected. During calibration, a testing machine is required to be prepared, then a high-speed 485 tool is used for connection, one end of the high-speed 485 tool is connected with the other end of the external calibration interface 422, the other end of the high-speed 485 tool is connected with the testing machine, and then an encoder testing interface of the Delixi tool is opened for corresponding calibration.

It should be noted that, the specific calibration process and the tool used are all of the prior art, and detailed descriptions of how to calibrate and use the tool are omitted here.

In addition, since the motor is required to be connected to the power line and the magnetoelectric encoder 421 is required to be connected to the power line, a potential difference exists between the motor and the magnetoelectric encoder 421, and in order to eliminate the potential difference, the ground wire of the magnetoelectric encoder 421 is fixed to the set of connecting members 43 connected to the lid 21, and the case is connected to the ground wire of the magnetoelectric encoder 421 via the connecting members 43, so that the potential difference between the motor and the magnetoelectric encoder 421 is eliminated.

The implementation principle of the motor with the encoder in the embodiment of the application is as follows: first, the detection assembly 40 is mounted: firstly, fixing an electromagnetic head 30 on the axis of an output shaft 10 of a motor, then installing a connecting base 41 on a cover body 21, enabling one end of the output shaft 10 of the motor, which is provided with the electromagnetic head 30, to be located in a placement area 412, then fixing a magnetic braiding plate 423 on the connecting base 41, enabling a magneto-electric encoder 421 to be aligned with the electromagnetic head 30 on the output shaft 10 of the motor, then fixing the connecting base 41 and the cover body 21 by using a group of connecting pieces 43 through corresponding kidney-shaped grooves 411, slightly rotating the position between the connecting base 41 and the cover body 21, further enabling the distance between the magneto-electric encoder 421 and the electromagnetic head 30 to be 0.8-1 mm, and then screwing another group of connecting pieces 43 to enable the magneto-electric encoder 421 to pass through the corresponding kidney-shaped grooves 411 to be abutted with the cover body 21; next, calibration of the external calibration interface 422; finally, when the output shaft 10 of the motor rotates, the electromagnetic head 30 is further driven to cut a magnetic field parallel to the direction of the electromagnetic head 421 so that the electromagnetic head 421 senses a change of the magnetic field position of the electromagnetic head 30 mounted on the output shaft 10, the sensed change of the magnetic field position is converted into an angle signal, and then the electromagnetic head 421 sends the acquired angle signal to the main control CPU, and the number of rotations of the electromagnetic head 30 is calculated and acquired by the main control CPU and recorded.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The motor with the encoder comprises an output shaft (10) and a shell (20), wherein the output shaft (10) is arranged in the shell (20), and is characterized by further comprising an electromagnetic head (30) and a detection assembly (40), the electromagnetic head (30) is arranged on the output shaft (10) of the motor, the detection assembly (40) is arranged on one side of the shell (20) close to the electromagnetic head (30), when the output shaft (10) of the motor rotates, the detection assembly (40) can detect the rotation of the electromagnetic head (30) and record the rotation times of the electromagnetic head (30), the detection assembly (40) comprises a connecting base (41), a detection circuit board (42) and a connecting piece (43) used for connecting the connecting base (41) and the shell (20), the connecting base (41) is arranged on one side of the shell (20) close to the electromagnetic head (30), the connecting base (41) and the shell (20) rotate along the output shaft (10), the detection circuit board (42) is axially connected with the connecting base (41) towards the one side (41), the connecting piece (43) penetrates through the kidney-shaped groove (411) to extend towards the shell (20), and the connecting piece (43) is used for fixing the connecting base (41) and the shell (20).

2. An encoder-equipped motor as claimed in claim 1, wherein: the connecting base (41) is provided with a placement area (412), the placement area (412) is communicated with the inside of the shell (20), and the placement area (412) is used for enabling the output shaft (10) to rotate.

3. An encoder-equipped motor as claimed in claim 2, wherein: the detection circuit board (42) includes a magnetoelectric encoder (421), and the magnetoelectric encoder (421) is configured to detect rotation of the electromagnetic head (30).

4. A motor with encoder as claimed in claim 3, wherein: the distance between the magnetoelectric encoder (421) and the electromagnetic head (30) is 0.8-1 mm.

5. An encoder-equipped motor as claimed in claim 1, wherein: the detection circuit board (42) comprises an external calibration interface (422), and the external calibration interface (422) is used for correcting the position relation between the connection base (41) and the electromagnetic head (30).

6. An encoder-equipped motor as claimed in claim 5, wherein: the connecting base (41) is provided with a plurality of limiting columns (413), the limiting columns (413) are arranged on one side, facing the external calibration interface (422), of the connecting base (41), the detection circuit board (42) is provided with limiting holes (424), and the limiting columns (413) are connected with the limiting holes (424).

7. An encoder-equipped motor as claimed in claim 1, wherein: the connecting base (41) is an insulating layer made of plastic.