CN212320967U - Sound wave motor moment testing device - Google Patents
Sound wave motor moment testing device Download PDFInfo
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- CN212320967U CN212320967U CN202021778555.6U CN202021778555U CN212320967U CN 212320967 U CN212320967 U CN 212320967U CN 202021778555 U CN202021778555 U CN 202021778555U CN 212320967 U CN212320967 U CN 212320967U
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- wave motor
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- arm disc
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Abstract
The utility model relates to a sound wave motor torque testing device, which comprises a test board; the test board is fixedly provided with a sound wave motor mounting seat, the sound wave motor is horizontally fixed on the sound wave motor mounting seat, and an output shaft of the sound wave motor extends out of the motor mounting seat by a section; the testing device also comprises a force arm disc, and the force arm disc is fixedly connected to the tail end of an output shaft of the sound wave motor; the testing device further comprises a tension device and an angle testing device, the tension device is mounted on the testing platform and connected with the force arm disc, the sound wave motor is not electrified, the tension device exerts a force F tangentially along the force arm disc, the force arm disc drives an output shaft of the sound wave motor to rotate a angle theta together, the sound wave motor is electrified to drive the force arm disc to overcome the force F, and the angle theta is reversely rotated; the angle testing device is installed on the testing platform and used for measuring the value of theta. Reasonable in design, simple structure, direct measurement k and BL that can be accurate.
Description
Technical Field
The utility model relates to a moment testing arrangement, concretely relates to sound wave motor moment testing arrangement.
Background
Sonic electric toothbrush motors are motors that provide a power output that oscillates back and forth about an axis, and are similar in principle to linear vibratory motors, except for linear reciprocation and rotary reciprocation.
In a natural state, a shaft of the motor is subjected to an internal restoring torque after rotating for a certain angle, Tk = k × θ, Tk is the restoring torque, k is a restoring torque constant (also referred to as an elastic constant), and θ is a rotation angle.
When current is applied, the motor can generate driving torque, Tm = BL I, Tm is electromagnetic driving torque, I is current, and BL is a torque constant.
How to accurately measure k and BL is an urgent problem to be solved in the field.
Disclosure of Invention
The utility model provides a, direct measurement k that can be accurate and BL's sound wave motor torque testing arrangement.
The technical scheme of the utility model:
a sound wave motor torque testing device comprises a testing platform; the test board is fixedly provided with a sound wave motor mounting seat, the sound wave motor is horizontally fixed on the sound wave motor mounting seat, and an output shaft of the sound wave motor extends out of the motor mounting seat by a section; the testing device also comprises a force arm disc, and the force arm disc is fixedly connected to the tail end of an output shaft of the sound wave motor; the testing device further comprises a tension device and an angle testing device, the tension device is mounted on the testing platform and connected with the force arm disc, the sound wave motor is not electrified, the tension device exerts a force F tangentially along the force arm disc, the force arm disc drives an output shaft of the sound wave motor to rotate a angle theta together, the sound wave motor is electrified to drive the force arm disc to overcome the force F, and the angle theta is reversely rotated; the angle testing device is installed on the testing platform and used for measuring the value of theta.
When the device is used:
1) the sound wave motor is not electrified, namely Tm is 0, a force F is tangentially applied by the tension device along the force arm disc, and the force arm disc drives an output shaft of the sound wave motor to rotate together by a rotation angle theta; at this time, the moment arm disk is stable after rotating by the angle θ, that is, the moment T generated by the force F on the force arm disk and the internal restoring moment Tk received by the output shaft of the acoustic wave motor are balanced, i.e., T = Tk, T = F × R, Tk = k × θ, and R is the radius of the force arm disk, so we can obtain k = (F × R)/θ.
2) The sound wave motor is electrified to drive the power arm disc to overcome the force F to reversely rotate by an angle theta, namely Tk = 0; at this time, the moment arm disc is stable after rotating the angle θ reversely, that is, the moment T generated by the force F to the force arm disc is balanced with the driving moment Tm generated by the acoustic motor, i.e., T = Tm, T = F R, Tk = BL I, R is the radius of the force arm disc, and I is the current of the acoustic motor, so we can obtain BL = (F R)/I.
The tension device comprises a pulley, a pull rope and a weight, the pulley is fixedly connected to the test board through a support and is opposite to the force arm disc, one end of the pulley is wound on the outer peripheral surface of the force arm disc and is connected with the force arm disc, the other end of the pulley is connected with the weight, the weight naturally falls, and the gravity mg of the weight forms the force F.
The angle testing device comprises a reflector, a receiving surface and a laser emitting device, wherein a lug is fixedly connected to the force arm disc, the reflector is adhered to the lug and rotates along with the force arm disc, the laser emitting device is fixedly connected to the testing table through a support, and the receiving surface is arranged at a far distance; the light emitted by the laser emitting device is reflected by the reflector, a light spot is formed on the receiving surface, the light spot moves on the receiving surface along with the rotation of the reflector to form a light ray, and the light reflected by the reflector is vertical to the receiving surface before the reflector rotates; the rotating angle of the reflector is the theta; preferably, the laser emitting device is a laser pen, and the receiving surface is a wall surface.
When the reflecting mirror is used, before the reflecting mirror rotates, the vertical distance between a reflecting point of the reflecting mirror and a receiving surface is measured to be d, the length of light is measured to be L, and according to the optical principle, an included angle formed by reflecting boundary light and initial light is known to be 2 theta; in this case, according to the theorem relating to right triangles, tan2 θ = L/d, i.e., θ = arctan (L/d)/2 can be obtained.
The test bench is formed by connecting a bottom plate and support legs supported at four corners of the bottom plate.
The utility model has the advantages of, reasonable in design, simple structure, direct measurement k and BL that can be accurate.
Drawings
Fig. 1 is a perspective view of an acoustic motor torque testing device.
Fig. 2 is a front view of the acoustic motor torque testing apparatus.
Fig. 3 is a partially enlarged schematic view of fig. 2.
Fig. 4 is a light ray diagram used by the angle measuring device.
In the figure, a test board 1, a force arm disc 2, a convex block 2-1, a tension device 3, a pulley 3-1, a pull rope 3-2, a weight 3-3, an angle test device 4, a reflector 4-1, a receiving surface 4-2, a laser emission device 4-3, a sound wave motor mounting base 5 and a sound wave motor 6 are arranged.
Detailed Description
As shown in fig. 1-4, a torque testing device for a sound wave motor comprises a testing table 1, a moment arm disc 2, a tension device 3 and an angle testing device 4; the test board 1 is fixedly provided with a sound wave motor mounting seat 5, the sound wave motor 6 is horizontally fixed on the sound wave motor mounting seat 5, and an output shaft of the sound wave motor 6 extends out of the motor mounting seat 5 by a section; the force arm disc 2 is fixedly connected to the tail end of an output shaft of the sound wave motor 6.
The tension device 3 comprises a pulley 3-1, a pull rope 3-2 and a weight 3-3, the pulley 3-1 is fixedly connected to the test board 1 through a support and is opposite to the force arm disc 2, the pull rope 3-2 winds around the pulley 3-1, one end of the pull rope is wound around the outer peripheral surface of the force arm disc 2 and is connected with the force arm disc, the other end of the pull rope is connected with the weight 3-3, and the weight 3-3 naturally falls.
The angle testing device 4 comprises a reflecting mirror 4-1, a receiving surface 4-2 and a laser emitting device 4-3, wherein a lug 2-1 is fixedly connected to the arm disc 2, the reflecting mirror 4-1 is adhered to the lug 2-1 and rotates with the arm disc 2, the laser emitting device 4-3 is fixedly connected to the testing table 1 through a support, and the receiving surface 4-2 is arranged at a far distance; the light emitted by the laser emitting device 4-3 is reflected by the reflecting mirror 4-1, a light spot is formed on the receiving surface 4-2, the light spot moves on the receiving surface 4-2 along with the rotation of the reflecting mirror 4-1 to form a light ray, and the light reflected by the reflecting mirror 4-1 is vertical to the receiving surface 4-2 before the reflecting mirror 4-1 rotates.
The test bench 1 is formed by connecting a bottom plate 1-1 and support legs 1-2 supported at four corners of the bottom plate 1-1.
The above disclosure is only for the preferred embodiment of the present invention, but not intended to limit itself, and any changes and modifications made by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.
Claims (4)
1. A sound wave motor torque testing device comprises a testing platform; the test board is characterized in that a sound wave motor mounting seat is fixedly mounted on the test board, the sound wave motor is horizontally fixed on the sound wave motor mounting seat, and an output shaft of the sound wave motor extends out of a section of the motor mounting seat; the testing device also comprises a force arm disc, and the force arm disc is fixedly connected to the tail end of an output shaft of the sound wave motor; the testing device further comprises a tension device and an angle testing device, the tension device is mounted on the testing platform and connected with the force arm disc, the sound wave motor is not electrified, the tension device exerts a force F tangentially along the force arm disc, the force arm disc drives an output shaft of the sound wave motor to rotate a angle theta together, the sound wave motor is electrified to drive the force arm disc to overcome the force F, and the angle theta is reversely rotated; the angle testing device is installed on the testing platform and used for measuring the value of theta.
2. The torque testing device for the acoustic wave motor according to claim 1, wherein the tension device comprises a pulley, a pull rope and a weight, the pulley is fixedly connected to the test platform through a support and is opposite to the force arm disc, the pull rope is wound around the pulley, one end of the pull rope is wound around the outer circumferential surface of the force arm disc and is connected with the force arm disc, the other end of the pull rope is connected with the weight, the weight naturally falls, and the force F is formed by the gravity mg of the weight.
3. The acoustic motor torque testing device according to claim 1, wherein the angle testing device comprises a reflector, a receiving surface and a laser emitting device, wherein a projection is fixedly connected to the arm plate, the reflector is adhered to the projection and rotates with the arm plate, the laser emitting device is fixedly connected to the testing platform through a bracket, and the receiving surface is arranged at a remote place; the light emitted by the laser emitting device is reflected by the reflector, a light spot is formed on the receiving surface, the light spot moves on the receiving surface along with the rotation of the reflector to form a light ray, and the light reflected by the reflector is vertical to the receiving surface before the reflector rotates; the angle of rotation of the mirror is the theta.
4. The acoustic motor torque testing apparatus of claim 1, wherein the testing platform is formed by connecting a bottom plate with support legs supported at four corners of the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021778555.6U CN212320967U (en) | 2020-08-24 | 2020-08-24 | Sound wave motor moment testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021778555.6U CN212320967U (en) | 2020-08-24 | 2020-08-24 | Sound wave motor moment testing device |
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| CN212320967U true CN212320967U (en) | 2021-01-08 |
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| CN202021778555.6U Active CN212320967U (en) | 2020-08-24 | 2020-08-24 | Sound wave motor moment testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252182A (en) * | 2021-12-14 | 2022-03-29 | 苏州索迩电子技术有限公司 | Force measuring device |
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2020
- 2020-08-24 CN CN202021778555.6U patent/CN212320967U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252182A (en) * | 2021-12-14 | 2022-03-29 | 苏州索迩电子技术有限公司 | Force measuring device |
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