Ultrasonic motor for dental scaler

Abstract

The invention discloses an ultrasonic motor for a dental scaler, and particularly relates to the technical field of motors, the ultrasonic motor comprises a shell, a stator, a rotor and a motor driving range adjusting mechanism; wherein the motor driving range adjusting mechanism comprises a transmission shaft, a polarization shaft, a micro electric cylinder, a connecting block, a concave block, two connecting shafts, a sleeving rod, a pull shaft, a hinge block, a sleeving block, a limiting strip and a limiting inner ring; the device further comprises a sealing vibration limiting mechanism and a sensing proofreading mechanism. The motor driving range adjusting mechanism has the advantages that the driving vibration range of the polarization shaft can be limited and adjusted through the two limiting strips, and the vibration deviation range of the output end of the ultrasonic motor can be accurately adjusted according to actual needs, so that the problem that the vibration deviation range of the output end of the ultrasonic motor is difficult to adjust according to the actual needs is solved. And the vibration offset range of the output end of the ultrasonic motor is difficult to accurately adjust.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly to an ultrasonic motor for a tooth cleaner. Background Art

[0002] The working principle of ultrasonic motor in tooth cleaner is mainly based on high-frequency vibration and cavitation. Specifically, it is high-frequency vibration: ultrasonic motor can generate high-frequency vibration, which is transmitted to the tooth surface through the working head of the tooth cleaner. Under the action of vibration, deposits such as dental plaque and tartar will be effectively decomposed and peeled off the tooth surface.

[0003] In the existing public literature, patent announcement number CN117200504A discloses an ultrasonic motor for an electric toothbrush, which uses a shock absorber to reduce vibration of the motor caused by axial runout of the output shaft, thereby reducing the vibration and noise felt by the user when using the electric toothbrush and improving the comfort of use. The motor output shaft is sealed at one end by a spring and a sealing ring, and a secondary seal is performed by a sealing plate. The double seal reduces the probability of water damage to the motor and extends the service life of the ultrasonic motor. However, the ultrasonic motor has the following problems.

[0004] When an ultrasonic motor is used in a tooth cleaner, it can provide high-frequency vibrations, and combined with the ultrasonic transmission operation, it will cause the driver to produce vibrations within a certain range. However, the vibration range is limited. For some narrow gaps, the vibration range of the ultrasonic motor output end is wider, which will cause damage to the teeth. This makes it difficult to accurately adjust the vibration offset range of the ultrasonic motor output end according to actual needs. For this reason, an ultrasonic motor for a tooth cleaner is needed. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solutions: an ultrasonic motor for a tooth cleaner, comprising a shell, a stator and a rotor, wherein the stator is fixed to the inner wall of the shell, the rotor is rotatably connected to the inner wall of the stator, and a motor drive range adjustment mechanism is fixedly installed on one end of the rotor; the motor drive range adjustment mechanism comprises a transmission shaft fixedly arranged on one end of the rotor, and one end of the transmission shaft is fixedly connected to a polarization axis, a micro-electric cylinder is provided on one side of the polarization axis, an output end of the micro-electric cylinder is fixedly connected to a connecting block, and one side of the connecting block is fixedly connected to a concave block.

[0006] The inner wall of the concave block is fixedly connected to two connecting shafts, and the outer wall of each connecting shaft is rotatably connected to a sleeve rod, and the inner wall of the sleeve rod is rotatably connected to a pulling shaft at a position away from the connecting shaft, and a hinge block is fixedly connected to one end of the pulling shaft; a sleeve block is fixedly connected to one side of the hinge block, and the sleeve block drives one end to be fixedly installed with a limiting strip, and a limiting inner ring is fixedly installed on one end of the micro electric cylinder; the inner wall of the limiting inner ring is provided with a sealing vibration limiting mechanism; a sensing proofreading mechanism is installed on one side of the sleeve block.

[0007] Preferably, the cross-sectional shapes of the concave block and the hinge block are both concave, and the vertical cross-sectional shapes of the pull shaft and the connecting shaft are circular. The vertical cross-sectional shape of the limit strip is an arc, and the inner walls of the two limit strips are smooth. A guide column is provided on the inner wall of the sleeve block, and the two sleeve blocks are slidably connected to the guide column; a guide frame is fixedly installed on the top of the guide column, and the two sleeve blocks are slidably connected to the guide frame, and the guide frame is fixedly connected to the limit inner ring.

[0008] Preferably, a rotating ring is fixedly connected to the outer wall of the polarization axis and close to the transmission shaft; An eccentric block is fixedly connected to the bottom end of the outer wall of the rotating ring. An ultrasonic generator is arranged on one side of the transmission shaft, and the ultrasonic generator is fixedly connected to the housing.

[0009] When the technical solution is used, the driving vibration range value is set through the circuit board, and the micro-electric cylinder is powered by the circuit board, the connecting block causes the concave block to move right, the two connecting shafts respectively drive one end of the two sleeve rods to move right synchronously, the other end of the sleeve rod drives the pull shaft to move down, and the other pull shaft moves up. The hinge block drives the sleeve block to move down, the sleeve block slides down along the outer wall of the guide column, and the sleeve block slides down along the inner wall of the guide frame, and the sleeve block causes the limit bar to move down, and the other limit bar moves up.

[0010] Preferably, the sealing vibration limiting mechanism comprises a rubber ring fixedly arranged on the inner wall of the limiting inner ring; the rubber ring is rotatably connected to the polarization axis, the outer wall of the limiting inner ring is installed with a limiting outer ring, the outer shell and the limiting inner ring are both fixedly connected to the limiting outer ring, one side of the limiting inner ring is fixedly connected to a limiting support ring, the polarization axis is rotatably connected to the limiting support ring; a tip is fixedly connected to one end of the polarization axis. The vertical cross-section of the rubber ring is in the shape of a circular ring, and the rubber ring is made of rubber material.

[0011] When the technical solution is in use, the circuit board starts the stator to rotate the rotor, which drives the transmission shaft to rotate, the polarization axis drives the swivel to rotate, and the eccentric block rotates eccentrically. At the same time, the ultrasonic generator can perform ultrasonic auxiliary vibration on the transmission shaft, and the transmission shaft can synchronously drive the polarization axis to vibrate. The rubber ring undergoes deformation linkage, and the polarization axis contacts the inner walls of the two limit bars. The polarization axis realizes ultrasonic driven vibration operation, and the limit outer ring is supported by the outer shell. The limit outer ring supports the limit inner ring, and the limit inner ring can perform limit operation on the outer wall of the rubber ring.

[0012] Preferably, the sensor calibration mechanism comprises a support block fixedly arranged on one side of the sleeve block; A tilting bar is fixedly connected to one side of the support block, a sleeve block is fixedly installed at the bottom end of the support block, a main distance sensor is fixedly connected to the inner wall of the sleeve block, a fixed sleeve block is arranged below the sleeve block, the fixed sleeve block is fixedly connected to the limiting inner ring, and both the support block and the sleeve block are slidably connected to the limiting inner ring; a calibration distance sensor is fixedly installed on the inner wall of the fixed sleeve block, and a circuit board fixedly connected to the limiting inner ring is arranged below the fixed sleeve block. The top surface of the calibration distance sensor is in the same horizontal plane as the upper surface of the fixed sleeve block, and the lower surface of the sleeve block is arranged parallel to the upper surface of the fixed sleeve block.

[0013] When the technical solution is in use, when the sleeve block moves downward, it will drive the support block to move downward, the tilt bar makes the sleeve block move downward, the main distance sensor approaches the fixed sleeve block, and the sleeve block and the support block slide downward on the limit inner ring. The main distance sensor can sense the distance of the fixed sleeve block, and the calibration distance sensor can sense the distance of the sleeve block. When the distance value sensed by the calibration distance sensor and the distance value sensed by the main distance sensor are the same as the driving vibration range value set by the circuit board.

[0014] Technical effects and advantages of the present invention: The present invention drives the range adjustment mechanism through a motor. The micro-electric cylinder pushes the connecting block to move right, and the connecting block causes the concave block to move right. The two connecting shafts respectively drive one end of the two sleeve rods to move right synchronously. The other end of the sleeve rod drives the pulling shaft to move downward, and the other pulling shaft moves upward. The hinge block drives the sleeve block to move downward. The two limit strips can limit the driving vibration range of the polarization axis and can accurately adjust the vibration offset range of the output end of the ultrasonic motor according to actual needs.

[0015] The present invention adopts a sealed vibration limiting mechanism, and the transmission shaft can synchronously drive the polarization axis to vibrate. The polarization axis vibrates at a high frequency ultrasonically inside the rubber ring, and the rubber ring undergoes deformation linkage, so that the polarization axis contacts the inner walls of the two limiting strips, and the limiting outer ring is supported by the outer shell, and the limiting outer ring supports the limiting inner ring. The limiting support ring can perform a limiting rotation operation on the outer wall of the polarization axis, and the polarization axis can vibrate ultrasonically within a specified range.

[0016] The present invention adopts a sensing calibration mechanism, the support block drives the tilting bar to move downward, the main distance sensor approaches the fixed sleeve block, the sleeve block and the support block slide downward on the limit inner ring, and when the distance value sensed by the calibration distance sensor and the distance value sensed by the main distance sensor are the same as the driving vibration range value set by the circuit board, the polarization axis can be driven to vibrate within the limited range between the two limit bars.

[0017] The interaction of the above multiple functions first enables the two limit bars to limit the driving vibration range of the polarization axis, then enables the limit support ring to limit the rotation of the outer wall of the polarization axis, and finally makes the distance value sensed by the calibration distance sensor and the distance value sensed by the main distance sensor the same as the driving vibration range value set by the circuit board. In summary, the vibration offset range of the output end of the ultrasonic motor can be accurately adjusted according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the front view of the ultrasonic motor used for a tooth cleaner of the present invention.

[0019] Figure 2 It is a schematic diagram of the vertical cross-section structure of the ultrasonic motor used for a tooth cleaner of the present invention.

[0020] Figure 3 It is a schematic diagram of the partial structure of the connection between the limiting outer ring and the limiting inner ring of the present invention.

[0021] Figure 4 For the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0022] Figure 5 It is a schematic diagram of the partial structure of the connection between the housing and the ultrasonic generator of the present invention.

[0023] Figure 6 It is a schematic diagram of the vertical cross-section structure of the ultrasonic motor used for a tooth cleaner of the present invention.

[0024] Figure 7 For the present invention Figure 6 Enlarged structural diagram at B in the middle.

[0025] Figure 8 It is a schematic diagram of the local structure of the sensor proofreading mechanism of the present invention.

[0026] The accompanying drawings are marked as follows: 1. outer casing; 2. stator; 3. rotor; 4. transmission shaft; 5. polarization axis; 6. micro electric cylinder; 7. connecting block; 8. concave block; 9. connecting shaft; 10. sleeve rod; 11. pull shaft; 12. hinge block; 13. sleeve block; 14. limit strip; 15. limit inner ring; 16. guide column; 17. guide frame; 18. swivel; 19. eccentric block; 20. ultrasonic generator; 21. rubber ring; 22. limit outer ring; 23. limit support ring; 24. tip; 25. support block; 26. tilting bar; 27. sleeve block; 28. main distance sensor; 29. ​​fixed sleeve block; 30. calibration distance sensor; 31. circuit board. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] As attached Figure 1 - Attachment Figure 8 An ultrasonic motor for a tooth cleaner is shown, and the ultrasonic motor for the tooth cleaner is provided with a motor drive range adjustment mechanism, a sealing vibration limit mechanism, and a sensor calibration mechanism. The setting of each mechanism can accurately adjust the vibration deviation range of the output end of the ultrasonic motor according to actual needs. The specific structural settings of each mechanism are as follows.

[0029] In this technical solution, as shown in the attached Figure 1 - Attachment Figure 4 As shown, the stator 2 is fixed to the inner wall of the outer shell 1, the rotor 3 is rotatably connected to the inner wall of the stator 2, and a motor drive range adjustment mechanism is fixedly installed at one end of the rotor 3; the motor drive range adjustment mechanism includes a transmission shaft 4 fixedly arranged at one end of the rotor 3, and one end of the transmission shaft 4 is fixedly connected to a polarization axis 5, a micro-electric cylinder 6 is provided on one side of the polarization axis 5, the output end of the micro-electric cylinder 6 is fixedly connected to a connecting block 7, and one side of the connecting block 7 is fixedly connected to a concave block 8.

[0030] The inner wall of the concave block 8 is fixedly connected to two connecting shafts 9, and the outer wall of each connecting shaft 9 is rotatably connected to a sleeve rod 10. The inner wall of the sleeve rod 10 is rotatably connected to a pulling shaft 11 at a position away from the connecting shaft 9, and a hinge block 12 is fixedly connected to one end of the pulling shaft 11; a sleeve block 13 is fixedly connected to one side of the hinge block 12, and the sleeve block 13 drives one end to be fixedly installed with a limit strip 14, and a limit inner ring 15 is fixedly installed at one end of the micro electric cylinder 6; the inner wall of the limit inner ring 15 is provided with a sealing vibration limit mechanism; a sensing proofreading mechanism is installed on one side of the sleeve block 13.

[0031] In this technical solution, as shown in the attached Figure 4 - Attachment Figure 5 As shown, the inner wall of the sleeve block 13 is provided with a guide column 16, and the two sleeve blocks 13 are slidably connected to the guide column 16; the top of the guide column 16 is fixedly installed with a guide frame 17, and the two sleeve blocks 13 are slidably connected to the guide frame 17, and the guide frame 17 is fixedly connected to the limiting inner ring 15, so that the sleeve block 13 slides down along the outer wall of the guide column 16, and the sleeve block 13 slides down along the inner wall of the guide frame 17, so as to realize the guided sliding operation. A rotating ring 18 is fixedly connected to the outer wall of the polarization axis 5 and close to the transmission shaft 4; an eccentric block 19 is fixedly connected to the bottom end of the outer wall of the rotating ring 18, so that the polarization axis 5 drives the rotating ring 18 to rotate, and the rotating ring 18 drives the eccentric block 19 to rotate, and the eccentric block 19 rotates eccentrically, which can generate eccentric vibration force.

[0032] An ultrasonic generator 20 is provided on one side of the transmission shaft 4, and the ultrasonic generator 20 is fixedly connected to the housing 1, so that the ultrasonic generator 20 can simultaneously perform ultrasonic auxiliary vibration on the transmission shaft 4, so that the transmission shaft 4 can synchronously drive the polarization axis 5 to vibrate, thereby realizing the vibration operation of the polarization axis 5.

[0033] In this technical solution, as shown in the attached Figure 1 - Attachment Figure 5 As shown, the sealing vibration limiting mechanism includes a rubber ring 21 fixedly arranged on the inner wall of the limiting inner ring 15; the rubber ring 21 is rotatably connected to the polarization axis 5, the outer wall of the limiting inner ring 15 is installed with a limiting outer ring 22, the outer shell 1 and the limiting inner ring 15 are both fixedly connected to the limiting outer ring 22, one side of the limiting inner ring 15 is fixedly connected to a limiting support ring 23, and the polarization axis 5 is rotatably connected to the limiting support ring 23; a tip 24 is fixedly connected to one end of the polarization axis 5. The vertical cross-section of the rubber ring 21 is annular, and the rubber ring 21 is made of rubber material.

[0034] In this technical solution, as shown in the attached Figure 6 - Attachment Figure 8 As shown, the sensing calibration mechanism includes a support block 25 fixedly arranged on one side of the sleeve block 13; a tilting bar 26 is fixedly connected to one side of the support block 25, a sleeve block 27 is fixedly installed at the bottom end of the support block 25, a main distance sensor 28 is fixedly connected to the inner wall of the sleeve block 27, a fixed sleeve block 29 is arranged below the sleeve block 27, the fixed sleeve block 29 is fixedly connected to the limiting inner ring 15, and both the support block 25 and the sleeve block 27 are slidably connected to the limiting inner ring 15; a calibration distance sensor 30 is fixedly installed on the inner wall of the fixed sleeve block 29, and a circuit board 31 fixedly connected to the limiting inner ring 15 is arranged below the fixed sleeve block 29. The top surface of the calibration distance sensor 30 is in the same horizontal plane as the upper surface of the fixed sleeve block 29, and the lower surface of the sleeve block 27 is arranged parallel to the upper surface of the fixed sleeve block 29.

[0035] The working principle of the ultrasonic motor used for the tooth cleaner of the present invention is as follows: Step 1: When installing the motor, install the outer shell 1 in the installation groove of the tooth cleaner, and inject sealing and fixing glue into the edge gap to complete the installation operation of the outer shell 1.

[0036] Step 2: When adjusting the motor driving range, the driving vibration range value is set through the circuit board 31, and the micro-electric cylinder 6 is powered through the circuit board 31, and the micro-electric cylinder 6 pushes the connecting block 7 to move right, and the connecting block 7 makes the concave block 8 move right, and the concave block 8 drives the two connecting shafts 9 to move right synchronously, and the two connecting shafts 9 respectively drive one end of the two sleeve rods 10 to move right synchronously, and the other end of the sleeve rod 10 drives the pull shaft 11 to move down, and the other pull shaft 11 moves up. The hinge block 12 is driven down by the pull shaft 11, and the hinge block 12 drives the sleeve block 13 to move down, and the sleeve block 13 slides down along the outer wall of the guide column 16, and the sleeve block 13 slides down along the inner wall of the guide frame 17, and the sleeve block 13 makes the limit bar 14 move down, and the limit bar 14 moves down, and the other limit bar 14 moves up, and the two limit bars 14 can limit the driving vibration range of the polarization axis 5.

[0037] Step 3: During sensor calibration, when the sleeve block 13 moves downward, the support block 25 moves downward, the support block 25 drives the tilt bar 26 to move downward, the tilt bar 26 makes the sleeve block 27 move downward, the sleeve block 27 drives the main distance sensor 28 to move downward, and the main distance sensor 28 approaches the fixed sleeve block 29, and supports the fixed sleeve block 29 through the limit inner ring 15. At the same time, the sleeve block 27 and the support block 25 slide downward on the limit inner ring 15. In this way, the main distance sensor 28 can perform distance sensing on the fixed sleeve block 29, and the calibration distance sensor 30 can perform distance sensing on the sleeve block 27. When the distance value sensed by the calibration distance sensor 30 and the distance value sensed by the main distance sensor 28 are the same as the driving vibration range value set by the circuit board 31, the micro-electric cylinder 6 is closed through the circuit board 31, so that the polarization axis 5 can be driven to vibrate within the limited range between the two limit bars 14.

[0038] Step 4: When the sealed ultrasonic vibration is limited, the stator 2 is supported by the housing 1, and the circuit board 31 starts the stator 2, so that the rotor 3 rotates, and the rotor 3 drives the transmission shaft 4 to rotate, and the transmission shaft 4 rotates the polarization axis 5. At the same time, the polarization axis 5 drives the rotating ring 18 to rotate, and the rotating ring 18 drives the eccentric block 19 to rotate. The eccentric block 19 rotates eccentrically, so that the polarization axis 5 vibrates, and the ultrasonic generator 20 can perform ultrasonic auxiliary vibration on the transmission shaft 4, so that the transmission shaft 4 can synchronously drive the polarization axis 5 to vibrate, and the polarization axis 5 vibrates at a high frequency ultrasonically inside the rubber ring 21, and the rubber ring 21 has a deformation linkage, so that the polarization axis 5 contacts the inner walls of the two limit strips 14, so that the polarization axis 5 realizes ultrasonic driven vibration operation, and at the same time, the polarization axis 5 drives the tip 24 to vibrate. The limit outer ring 22 is supported by the housing 1, and the limit outer ring 22 supports the limit inner ring 15. The limit inner ring 15 can perform a limit operation on the outer wall of the rubber ring 21, and the limit support ring 23 can perform a limit rotation operation on the outer wall of the polarization axis 5.

[0039] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic motor for a tooth cleaner, comprising a housing (1), a stator (2) and a rotor (3), wherein the stator (2) is fixed to the inner wall of the housing (1), and the rotor (3) is rotatably connected to the inner wall of the stator (2), characterized in that: A motor drive range adjustment mechanism is fixedly mounted on one end of the rotor (3); The motor drive range adjustment mechanism comprises a transmission shaft (4) fixedly arranged at one end of a rotor (3), wherein one end of the transmission shaft (4) is fixedly connected to a polarization axis (5), one side of the polarization axis (5) is provided with a micro electric cylinder (6), an output end of the micro electric cylinder (6) is fixedly connected to a connection block (7), and one side of the connection block (7) is fixedly connected to a concave block (8); The inner wall of the concave block (8) is fixedly connected to two connecting shafts (9), the outer wall of each connecting shaft (9) is rotatably connected to a sleeve rod (10), the inner wall of the sleeve rod (10) is rotatably connected to a pull shaft (11) at a position away from the connecting shaft (9), and a hinge block (12) is fixedly connected to one end of the pull shaft (11); One side of the hinge block (12) is fixedly connected to a sleeve block (13), and the sleeve block (13) drives one end portion to be fixedly installed with a limit strip (14), and one end portion of the micro electric cylinder (6) is fixedly installed with a limit inner ring (15); The inner wall of the limiting inner ring (15) is provided with a sealing vibration limiting mechanism; A sensor calibration mechanism is installed on one side of the socket block (13).

2. The ultrasonic motor for a tooth cleaner according to claim 1, characterized in that: The cross-sectional shapes of the concave block (8) and the hinge block (12) are both concave, and the vertical cross-sectional shapes of the pulling shaft (11) and the connecting shaft (9) are circular.

3. The ultrasonic motor for a tooth cleaner according to claim 1, characterized in that: The vertical cross-section of the limiting strip (14) is in the shape of an arc, and the inner walls of the two limiting strips (14) are both smooth surfaces.

4. The ultrasonic motor for a tooth cleaner according to claim 1, characterized in that: A guide column (16) is provided on the inner wall of the sleeve block (13), and the two sleeve blocks (13) are slidably connected to the guide column (16); A guide frame (17) is fixedly mounted on the top of the guide column (16); the two sleeve blocks (13) are slidably connected to the guide frame (17); and the guide frame (17) is fixedly connected to the limiting inner ring (15).

5. The ultrasonic motor for a tooth cleaner according to claim 1, characterized in that: A rotating ring (18) is fixedly connected to the outer wall of the polarization axis (5) and close to the transmission shaft (4); An eccentric block (19) is fixedly connected to the bottom end of the outer wall of the rotating ring (18).

6. The ultrasonic motor for a tooth cleaner according to claim 1, characterized in that: An ultrasonic generator (20) is provided on one side of the transmission shaft (4), and the ultrasonic generator (20) is fixedly connected to the housing (1).

7. The ultrasonic motor for a tooth cleaner according to claim 1, characterized in that: The sealing vibration limiting mechanism comprises a rubber ring (21) fixedly arranged on the inner wall of the limiting inner ring (15); The rubber ring (21) is rotatably connected to the polarization axis (5); a rotatable outer ring (22) is mounted on the outer wall of the limit inner ring (15); the outer shell (1) and the limit inner ring (15) are fixedly connected to the limit outer ring (22); one side of the limit inner ring (15) is fixedly connected to a limit support ring (23); and the polarization axis (5) is rotatably connected to the limit support ring (23); A tip (24) is fixedly connected to one end of the polarization axis (5).

8. The ultrasonic motor for a tooth cleaner according to claim 7, characterized in that: The vertical cross-section of the rubber ring (21) is in the shape of a circular ring, and the rubber ring (21) is made of rubber material.

9. The ultrasonic motor for a tooth cleaner according to claim 1, characterized in that: The sensor calibration mechanism comprises a support block (25) fixedly arranged on one side of the sleeve block (13); A tilting bar (26) is fixedly connected to one side of the support block (25); a sleeve block (27) is fixedly installed at the bottom end of the support block (25); a main distance sensor (28) is fixedly connected to the inner wall of the sleeve block (27); a fixed sleeve block (29) is provided below the sleeve block (27); the fixed sleeve block (29) is fixedly connected to the limiting inner ring (15); and both the support block (25) and the sleeve block (27) are slidably connected to the limiting inner ring (15); A calibration distance sensor (30) is fixedly mounted on the inner wall of the fixed sleeve block (29), and a circuit board (31) fixedly connected to the limiting inner ring (15) is provided below the fixed sleeve block (29).

10. The ultrasonic motor for a tooth cleaner according to claim 9, characterized in that: The top surface of the calibration distance sensor (30) and the upper surface of the fixed sleeve block (29) are in the same horizontal plane, and the lower surface of the sleeve block (27) and the upper surface of the fixed sleeve block (29) are arranged in parallel.

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