CN216904510U

CN216904510U - Motor with rotation angle measurement function

Info

Publication number: CN216904510U
Application number: CN202220403295.7U
Authority: CN
Inventors: 彭炯
Original assignee: Shenzhen Omni Intelligent Technology Co ltd
Current assignee: Shenzhen Omni Intelligent Technology Co ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-07-05
Anticipated expiration: 2032-02-25

Abstract

The application relates to a motor with a rotation angle measuring function, which comprises a motor body, a circuit board and a mounting plate, wherein the circuit board is arranged on one surface where an output shaft of the motor body is arranged; a movable grid ring is arranged on the circuit board around an output shaft of the motor body, an opening is formed in the movable grid ring, the opening cuts off the movable grid ring, and an initial end and a terminal end are formed on the movable grid ring; a fixed grid bar is arranged on the mounting plate, and a space is reserved between the fixed grid bar and the movable grid ring; when the fixed grid bars are positioned at the initial position, the projection on the circuit board is matched with the opening, and in the rotating process of the fixed grid bars from the initial end to the terminal end, the projection area of the fixed grid bars on the movable grid ring is gradually increased. In this application, when other devices of motor drive stopped, can measure the output angle of motor fast, have the effect of the operation of the control motor of being convenient for.

Description

Motor with rotation angle measurement function

Technical Field

The application relates to the field of motor detection technology, in particular to a motor with a rotation angle measuring function.

Background

At present, when the rotating angle of the motor rotor is measured, angle sensors are usually installed on the motor rotor and a motor shell, and the mechanical angle information of the motor at 0-359 degrees is obtained by utilizing numerical values collected by the angle sensors.

In the practical application process, the motor rotor is generally fixed on a device needing to be driven, and the angle sensor needs to be coaxially connected with the output shaft, so that the angle sensor is inconvenient to install. When angle measurement is carried out through the magnet and the Hall sensor, the magnet and the Hall sensor are respectively installed on the motor and a motor rotor, and when the angle measurement device is used for a long time, the magnet and the Hall sensor are easily influenced by a device needing to be driven, so that the final measurement result has large deviation.

With respect to the related art in the foregoing, the inventor believes that there is a drawback that the accuracy of the measurement result is not high when the rotation angle measurement is performed on the motor rotor.

SUMMERY OF THE UTILITY MODEL

In order to improve the accuracy of the rotation angle measurement of the motor rotor, the application provides a motor with a rotation angle measurement function.

The application provides a motor with rotation angle measurement function adopts following technical scheme:

a motor with a rotation angle measuring function comprises a motor body, a circuit board and a mounting plate, wherein the circuit board is arranged on one surface where an output shaft of the motor body is located, and the mounting plate is arranged on the output shaft of the motor body; a movable grid ring is arranged on the circuit board around an output shaft of the motor body, an opening is formed in the movable grid ring, the opening cuts off the movable grid ring, and an initial end and a termination end are formed on the movable grid ring; a fixed grid bar is arranged on the mounting plate, and a space is reserved between the fixed grid bar and the movable grid ring; when the fixed grid bars are located at the initial positions, the projection of the fixed grid bars on the circuit board is matched with the opening, and in the rotating process of the fixed grid bars from the initial ends to the terminal ends, the projection area of the fixed grid bars on the movable grid ring is gradually increased.

By adopting the technical scheme, the rotation angle of the motor rotor is measured by utilizing the capacitance formed between the movable grid ring and the fixed grid bar; when the movable grid ring and the fixed grid are installed, the circuit board and the installation plate provide installation foundation for the movable grid ring and the fixed grid, and the movable grid ring is not in contact with the fixed grid, so that the movable grid ring and the fixed grid are prevented from being abraded greatly as much as possible. When the fixed grid bars are at the initial positions, the projections of the fixed grid bars on the circuit board are positioned in the openings, when the output shaft of the motor starts to rotate, the fixed grid bars move along with the output shaft of the motor, and in the process from the initial end to the terminal end, the projection areas of the fixed grid bars on the movable grid ring become larger along with the increase of the rotation angle, so that the capacitance formed between the movable grid ring and the fixed grid bars becomes larger gradually; the rotation angle can be calculated by measuring the capacitance of the movable grid ring, and the rotation angle of the motor can be accurately measured.

Optionally, the motor body includes a driving motor and a speed reducer, an input shaft of the speed reducer is connected to an output shaft of the driving motor, and the mounting plate is disposed on the output shaft of the speed reducer.

Through adopting above-mentioned technical scheme, the speed reducer increases the moment of torsion through reducing output rotational speed, when using under different occasions, can select to change different driving motor or speed reducer according to the demand of different occasions to be applicable to in different occasions.

Optionally, an output shaft of the speed reducer is provided with a mounting seat and a connecting rod, the mounting seat is sleeved on the output shaft of the speed reducer, and the connecting rod is arranged on the mounting seat and the output shaft of the speed reducer in a penetrating manner; the mounting plate is fixed on the mounting seat.

By adopting the technical scheme, the mounting seat is detachably mounted on the output shaft of the speed reducing motor, and the output shaft of the speed reducing motor can drive the mounting seat to rotate through the connecting rod; the mounting plate is fixed on the mounting seat, so that the connecting rod or the mounting seat is convenient to disassemble and overhaul and replace.

Optionally, the distance from the outer side of the moving grid ring to the output shaft of the motor body is equal, and the distance from the inner side of the moving grid ring to the output shaft of the motor body is gradually reduced from the initial end to the terminal end.

Through adopting above-mentioned technical scheme, change the distance between the output shaft of the inside distance motor body of movable grid ring to when making on the movable grid ring different positions, the area between fixed grid strip and the movable grid ring is different.

Optionally, the distance from the inner side of the moving grid ring to the output shaft of the motor body is equal, and the distance from the outer side of the moving grid ring to the output shaft of the motor body is gradually increased from the initial end to the terminal end.

Through adopting above-mentioned technical scheme, change the distance between the output shaft of moving grid ring outside distance motor body to when making on the moving grid ring different positions, the area between fixed grid strip and the moving grid ring is different.

Optionally, the distance from the inner side of the moving grid ring to the output shaft of the motor body is gradually reduced from the initial end to the terminal end, and the distance from the outer side of the moving grid ring to the output shaft of the motor body is gradually increased from the initial end to the terminal end.

Through adopting above-mentioned technical scheme, the distance between the output shaft of the interior outer both sides distance motor body of moving grid ring all changes, and along the direction grow gradually from the initial end to the termination end, and the projected area overlapping effect is better obvious between fixed grid strip and the moving grid ring for the measured differentiation between the different positions on the moving grid ring is higher, the more be convenient for discernment.

Optionally, the motor further comprises a shell, and the motor body, the circuit board and the mounting plate are all arranged in the shell.

Through adopting above-mentioned technical scheme, motor body, circuit board and mounting panel keep in the shell, protect motor body, circuit board and mounting panel through the shell, reduce the impaired condition of motor body, circuit board and mounting panel in the use.

Optionally, the motor further comprises a sealing ring, the sealing ring is sleeved on the output shaft of the motor body, and the sealing ring is fixed on the shell.

Through adopting above-mentioned technical scheme, motor body receives the protection of shell, but motor body's output shaft wears to establish outside the shell, utilizes the sealing washer cover to establish on motor body's output shaft to fix the sealing washer on the shell, keep the leakproofness between shell and motor body's the output shaft when using, improve life.

Optionally, a through hole is formed in the side face of the housing, the through hole is located at one end far away from the output shaft of the motor body, and the through hole is used for installing a cable.

Through adopting above-mentioned technical scheme, utilize the through-hole on the shell, be convenient for carry out electric connection with cable and inside motor body, be convenient for simultaneously connect the cable and carry out the capacitance measurement between action bars ring and the fixed grid.

Optionally, an output shaft of the motor body is provided with a mounting position, and the mounting position is used for mounting and fixing the device to be driven.

Through adopting above-mentioned technical scheme, utilize the installation position to increase the output shaft of motor body and wait the stability that combines between the drive arrangement, improve the installation nature of motor output.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the fixed grid bars and the movable grid rings start to be measured from the initial positions, the angle is measured according to the projection overlapping area of the fixed grid bars, the measurement precision is high, and the result is accurate;

2. the mounting seat is detachably mounted and fixed, so that the related accessories can be conveniently maintained and replaced in the future;

3. can also conveniently carry out electric connection to motor body when improving the protection to motor body.

Drawings

Fig. 1 is a schematic cross-sectional view of a motor having a rotation angle measuring function according to an embodiment of the present application.

Fig. 2 is an exploded schematic view of a motor with a rotation angle measuring function according to an embodiment of the present application, after a housing is removed.

Fig. 3 is a schematic diagram of a mounting plate and a mounting seat in a motor with a rotation angle measuring function according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a moving grid ring on a circuit board in a motor with a rotation angle measurement function according to an embodiment of the present application.

Fig. 5 is a schematic view of an overall structure of a motor having a rotation angle measuring function according to an embodiment of the present application.

Description of reference numerals: 1. a motor body; 11. a drive motor; 12. a speed reducer; 121. an installation position; 2. a circuit board; 21. a movable grid ring; 211. an opening; 212. an initial end; 213. a terminating end; 3. mounting a plate; 31. fixing grid bars; 4. a mounting seat; 41. a connecting rod; 42. a groove; 5. a housing; 51. a through hole; 6. and (5) sealing rings.

Detailed Description

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

The embodiment of the application discloses a motor with rotation angle measurement function. Referring to fig. 1 and 2, the motor having a rotation angle measuring function includes a motor body 1, a circuit board 2, a mounting plate 3, a mounting seat 4, a housing 5, and a seal ring 6. Motor body 1, circuit board 2, mounting panel 3 and mount pad 4 all set up in shell 5. The output shaft of the motor body 1 penetrates through the shell 5, and the sealing ring 6 is sleeved on the output shaft of the motor body 1. By fixing the seal ring 6 to the housing 5, the sealing performance between the output shaft of the motor body 1 and the housing 5 is ensured. The circuit board 2 is arranged on one surface of the output shaft of the motor body 1, the mounting plate 3 is arranged on the mounting seat 4, and the mounting seat 4 is fixed on the output shaft of the motor body 1.

The motor body 1 includes a drive motor 11 and a speed reducer 12. An input shaft of the speed reducer 12 is connected with an output shaft of the driving motor 11, and the mounting plate 3 and the mounting seat 4 are fixed on the output shaft of the speed reducer 12. The speed reducer 12 increases the output torque by adjusting the output rotation speed, and is convenient for driving a device with a heavy load. The mounting seat 4 is sleeved on an output shaft of the speed reducer 12.

Referring to fig. 2 and 3, the circuit board 2 is provided with a movable grid ring 21, the mounting plate 3 is provided with a fixed grid bar 31, and a distance exists between the fixed grid bar 31 and the movable grid ring 21. The fixed grid bars 31 are driven to rotate by an output shaft of the motor body 1, and capacitance values formed by the fixed grid bars 31 at different positions on the movable grid ring 21 are different; the rotation angle of the output shaft of the motor body 1 is detected by measuring the capacitance formed by the stationary grid bars 31 on the moving grid ring 21.

A connecting rod 41 is further provided on the output shaft of the speed reducer 12, and the connecting rod 41 is provided through the mounting base 4 and the output shaft of the speed reducer 12. When the output shaft of the speed reducer 12 starts to rotate, the kinematic relationship between the output shaft of the speed reducer 12 and the mount 4 is maintained by the connecting rod 41. In this embodiment, a groove 42 is provided on an end surface of the mounting base 4 close to the speed reducer 12, and the mounting plate 3 is disposed in the groove 42 and fixedly connected to the mounting base 4. The fixed grid bars 31 are arranged on the side face, close to the circuit board 2, of the mounting plate 3, the mounting plate 3 is circular, the fixed grid bars 31 are fan-shaped, and the fixed grid bars 31 are arranged on the circular radius of the mounting plate 3.

Referring to fig. 2 and 4, the circuit board 2 is sleeved on the output shaft of the speed reducer 12 and fixed on the side surface where the output shaft of the speed reducer 12 is located. The movable grid ring 21 is arranged on the circuit board 2 around the output shaft of the speed reducer 12, and a gap exists between the movable grid ring 21 and the fixed grid bars 31, so that when the mounting plate 3 and the fixed grid bars 31 rotate, the fixed grid bars 31 are not in contact with the movable grid ring 21, and the damage condition of the fixed grid bars 31 or the movable grid ring 21 is reduced.

The moving grid ring 21 is provided with an opening 211, the opening 211 cuts off the moving grid ring 21 and forms an initial end 212 and a final end 213 on the moving grid ring 21. In the present embodiment, the distance from the outer side of the moving grid ring 21 to the output shaft of the motor body 1 is equal, and the distance from the inner side of the moving grid ring 21 to the output shaft of the motor body 1 is gradually reduced from the initial end 212 to the terminal end 213. That is, the width of the moving grate ring 21 where the initial end 212 is located is smaller than the width of the moving grate ring 21 where the terminal end 213 is located, and the width of the moving grate ring 21 is gradually increased from the initial end 212 to the terminal end 213. During the rotation of the fixed grid bars 31 from the initial end 212 to the terminal end 213, the projected area of the fixed grid bars 31 on the movable grid ring 21 is gradually increased.

The movable grid ring 21 and the fixed grid bars 31 are precisely processed printed circuit boards, and the movable grid ring 21 is provided with a plurality of emitting electrodes and a plurality of receiving electrodes which are distributed at intervals. Each emitter and adjacent receiver is in a set and a shield is provided between the emitters and receivers to avoid direct capacitive coupling between the emitters to the receivers. The grid bars 31 are provided with reflecting electrodes. When the fixed grid bars 31 are driven by the speed reducer 12 to rotate, the fixed grid bars 31 and the movable grid rings 21 are opposite in plane, and different capacitance values are finally formed according to different projection overlapping areas. During measurement, excitation signals are sent to different emitters, two pairs of capacitors between the emitters and the reflectors and between the reflectors and the receivers are coupled, synthetic signals are formed on the receivers, and the rotation angle of the speed reducer 12 can be measured by measuring the size of the synthetic signals.

In the initial position, the projection of the fixed grid bars 31 on the circuit board 2 is matched with the opening 211, so that no overlapping area exists between the projection of the fixed grid bars 31 and the movable grid ring 21; when the fixed grid bars 31 and the initial end 212 start to contact, an overlapping area is formed between the projection of the fixed grid bars 31 and the movable grid ring 21, namely, a corresponding capacitor is formed, and the overlapping area changes along with the change of the rotation angle, so that the capacitance value changes.

And the size of the sector of the fixing grid 31 is related to the measurement accuracy. For example, when the measurement accuracy is 1 °, the sector angle between the grid bars 31 and the output shaft of the speed reducer 12 is 1 °, and the sector angle between each group of the emitter and receiver electrodes and the output shaft of the speed reducer 12 is also 1 °. Namely, the final measured data is 0 to 359 degrees.

In other embodiments, the distance from the inner side of the moving grid ring 21 to the output shaft of the motor body 1 may be set to be equal, and the distance from the outer side of the moving grid ring 21 to the output shaft of the motor body 1 may be set to gradually increase from the initial end 212 to the terminal end 213. It is also possible to set the distance from the inner side of the moving grid ring 21 to the output shaft of the motor body 1 to be gradually decreased from the initial end 212 to the terminal end 213, and set the distance from the outer side of the moving grid ring 21 to the output shaft of the motor body 1 to be gradually increased from the initial end 212 to the terminal end 213.

Referring to fig. 1 and 5, a through hole 51 is provided in a side surface of the housing 5, and the through hole 51 is located at an end of the housing 5 away from the output shaft of the motor body 1. Because the whole motor body 1 is installed and protected through the shell 5, the through hole 51 on the shell 5 is utilized, so that the cable is conveniently electrically connected with the motor body 1 inside, and meanwhile, the cable is conveniently connected for capacitance measurement between the moving grid ring 21 and the fixed grid bar 31.

The output shaft of the motor body 1 is further provided with a mounting position 121, and the mounting position 121 is used for mounting and fixing a device to be driven. In this embodiment, the mounting portion 121 is a mounting surface on the output shaft of the speed reducer 12. Because the output shaft of the speed reducer 12 is cylindrical, the phenomenon of slipping is easy to occur during fixing of the device, and the phenomenon of slipping during driving of the motor body 1 is reduced by arranging the mounting surface on the output shaft of the speed reducer 12.

The implementation principle of the embodiment of the application is as follows: different capacitance values are formed by the projection areas of the fixed grid bars 31 at different positions on the movable grid ring 21 by utilizing the relative movement between the spaced fixed grid bars 31 and the movable grid ring 21; through measuring the electric capacity size on the movable grid ring 21, can calculate out rotation angle, realize the accurate measurement to the rotation angle of motor.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A motor with rotation angle measurement function, characterized in that: the motor comprises a motor body (1), a circuit board (2) and a mounting plate (3), wherein the circuit board (2) is arranged on one surface of the motor body (1) where an output shaft is located, and the mounting plate (3) is arranged on the output shaft of the motor body (1); a movable grid ring (21) is arranged on the circuit board (2) around an output shaft of the motor body (1), an opening (211) is arranged on the movable grid ring (21), the opening (211) cuts off the movable grid ring (21) and an initial end (212) and a terminal end (213) are formed on the movable grid ring (21); a fixed grid bar (31) is arranged on the mounting plate (3), and a space exists between the fixed grid bar (31) and the movable grid ring (21); when the fixed grid bars (31) are located at the initial positions, the projection of the fixed grid bars (31) on the circuit board (2) is matched with the opening (211), and in the rotating process of the fixed grid bars (31) from the initial end (212) to the terminal end (213), the projection area of the fixed grid bars (31) on the movable grid ring (21) is gradually increased.

2. The motor having a rotation angle measuring function according to claim 1, characterized in that: the motor body (1) comprises a driving motor (11) and a speed reducer (12), an input shaft of the speed reducer (12) is connected with an output shaft of the driving motor (11), and the mounting plate (3) is arranged on the output shaft of the speed reducer (12).

3. The motor having a rotation angle measuring function according to claim 2, characterized in that: an installation seat (4) and a connecting rod (41) are arranged on an output shaft of the speed reducer (12), the installation seat (4) is sleeved on the output shaft of the speed reducer (12), and the connecting rod (41) penetrates through the installation seat (4) and the output shaft of the speed reducer (12); the mounting plate (3) is fixed on the mounting seat (4).

4. The motor having a rotation angle measuring function according to claim 1, characterized in that: the distance from the outer side of the movable grid ring (21) to the output shaft of the motor body (1) is equal, and the distance from the inner side of the movable grid ring (21) to the output shaft of the motor body (1) is gradually reduced from the initial end (212) to the terminal end (213).

5. The motor having a rotation angle measuring function according to claim 1, characterized in that: the distance from the inner side of the movable grid ring (21) to the output shaft of the motor body (1) is equal, and the distance from the outer side of the movable grid ring (21) to the output shaft of the motor body (1) is gradually increased from the initial end (212) to the terminal end (213).

6. The motor having a rotation angle measuring function according to claim 1, characterized in that: the distance from the inner side of the movable grid ring (21) to the output shaft of the motor body (1) is gradually reduced from the initial end (212) to the terminal end (213), and the distance from the outer side of the movable grid ring (21) to the output shaft of the motor body (1) is gradually increased from the initial end (212) to the terminal end (213).

7. The motor having a rotation angle measuring function according to claim 1, characterized in that: still include shell (5), motor body (1) circuit board (2) and mounting panel (3) all set up in shell (5).

8. The motor having a rotation angle measuring function according to claim 7, characterized in that: still include sealing washer (6), sealing washer (6) cover is established on the output shaft of motor body (1), just sealing washer (6) are fixed on shell (5).

9. The motor having a rotation angle measuring function according to claim 7, characterized in that: the motor is characterized in that a through hole (51) is formed in the side face of the shell (5), the through hole (51) is located at one end, far away from an output shaft of the motor body (1), and the through hole (51) is used for installing a cable.

10. The motor having a rotation angle measuring function according to claim 1, characterized in that: an output shaft of the motor body (1) is provided with a mounting position (121), and the mounting position (121) is used for mounting and fixing a device to be driven.