PMTC dental polisher

Abstract

The utility model discloses a PMTC dental polisher which comprises a driving motor, a reduction gearbox assembly, a transmission assembly and a chuck assembly, an output shaft of the driving motor is in transmission connection with a center hole of the reduction gearbox assembly, and the reduction gearbox assembly, the transmission assembly and the chuck assembly are sequentially in transmission connection from bottom to top; the outer periphery of the chuck assembly is sleeved with the machine head, and the outer shell is arranged on the outer periphery of the driving motor and located above the machine head. The driving motor sequentially drives the reduction gearbox assembly, the transmission assembly and the chuck assembly to coaxially rotate, so that sufficient power and accurate transmission are guaranteed; the machine head arranged on the periphery can clamp the oral cavity tool installed in the chuck assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of dental medical instruments, and mainly relates to a PMTC dental polishing machine. Background Art

[0002] Dental handpieces, also known as oral handpieces, are an indispensable tool for dentists during treatment. To meet operational demands, higher output speeds are achieved by increasing the compressed air pressure or by adding a speed-increasing gear to the output of the pneumatic motor. This complicates the transmission assembly, making internal parts difficult to disassemble, and also results in unstable speeds and acceleration duration.

[0003] Because dental handpieces need to be cleaned and lubricated regularly to maintain their performance, if they are not cleaned thoroughly or lubricated properly, the handpiece performance may be degraded or damaged. Regular maintenance and replacement of parts, such as bearings, are also required. The transmission components with more complex structures will bring additional costs and time consumption when disassembling.

[0004] In addition, the various components of the transmission assembly are coaxially connected through bearings. The chuck is generally long, and the bearings are responsible for docking and connection. Long-term use may lead to inaccurate docking problems. The coordination between the machine head and the chuck, and the locking effect of the chuck in clamping the oral tool need to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a PMTC dental polishing machine which is convenient for installing and clamping oral tools and has precise transmission to ensure sufficient power and precise transmission.

[0006] The technical problem to be solved by the present invention can be achieved by adopting the following technical solutions:

[0007] A PMTC dental polishing machine, characterized by comprising:

[0008] A driving motor, a reduction gearbox assembly, a transmission assembly, and a chuck assembly, wherein the output shaft of the driving motor is connected to the center hole of the reduction gearbox assembly by a transmission connection, and the reduction gearbox assembly, the transmission assembly, and the chuck assembly are sequentially connected by a transmission connection from bottom to top;

[0009] A shell and a machine head, wherein the machine head is sleeved on the outer periphery of the chuck assembly, and the shell is arranged on the outer periphery of the driving motor and is located above the machine head.

[0010] In a preferred embodiment of the present invention, the reduction gear assembly includes a pair of sun gears and several pairs of planetary gears. The pair of sun gears are coaxially arranged along the longitudinal direction, each pair of planetary gears are coaxially arranged along the longitudinal direction, and the several planetary gears are respectively engaged with the pair of sun gears.

[0011] In a preferred embodiment of the present invention, the transmission assembly includes a plurality of ball bearings and at least one pair of mini gears. The central axis between the pair of mini gears is arranged longitudinally, and the pair of mini gears are arranged opposite to each other and connected by meshing transmission. The bottom of the pair of mini gears is connected to the reduction box assembly through at least one lower ball bearing, and the top of the pair of mini gears is connected to the chuck assembly through at least one middle ball bearing.

[0012] In a preferred embodiment of the present invention, the mini gear includes a cylindrical disk and a plurality of transmission teeth, and the plurality of transmission teeth are longitudinally arranged in a circular array on the outer periphery of the top end of the cylindrical disk.

[0013] In a preferred embodiment of the present invention, the machine head is a straight machine head, which includes a conical portion, a straight cylindrical portion, and a clamping portion. The bottom of the conical portion is arranged at the top of the outer shell, and the straight cylindrical portion is coaxially arranged at the top of the conical portion. The conical portion and the coaxial straight cylindrical portion are arranged in the middle and lower part, and the clamping portion is radially arranged at the top of the inner annular surface of the straight cylindrical portion.

[0014] In a preferred embodiment of the present invention, the handpiece is an angled handpiece, and the bottom of the angled handpiece is clamped to the top of the housing.

[0015] In a preferred embodiment of the present invention, a plurality of snap-in grooves are provided in a circular array in the middle and upper part of the chuck assembly, and the snap-in grooves extend along the longitudinal direction; the bottom of the chuck assembly is transmission-connected to the central axis of a pair of mini gears, and the outer periphery of the chuck assembly is connected to the conical portion of the straight machine head through an upper ball bearing.

[0016] In a preferred embodiment of the present invention, a gear fixing box is provided on the outer periphery of the transmission assembly, and the gear fixing box is connected to the outer periphery upper portion of the drive motor via a coupling sleeve.

[0017] In a preferred embodiment of the present invention, the housing is arranged on the periphery of the drive motor, and a circuit board and a switch button are arranged at the bottom of the drive motor.

[0018] The beneficial effects of the utility model are: a PMTC dental polisher, a driving motor sequentially drives the reduction box assembly, the transmission assembly, and the chuck assembly to rotate coaxially, ensuring sufficient power and precise transmission; the straight head arranged on the periphery can clamp the oral tools installed in the chuck assembly, and the outer shell has protective and aesthetic functions.

[0019] The reduction gear assembly adopts a planetary gear box, which enables the oral tool installed in the chuck assembly to have a higher speed; a pair of mini gears with longitudinal meshing transmission make the transmission more precise and the tool will work more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereoscopic diagram of a PMTC dental polishing machine of the present invention.

[0021] Figure 2 It is a cross-sectional view of a PMTC dental polishing machine of the present invention.

[0022] Figure 3 The utility model is an exploded structural diagram of a PMTC dental polishing machine.

[0023] Figure 4 It is a three-dimensional diagram of replacing the contra-angle handpiece head during use of the utility model.

[0024] Figure Number:

[0025] 11. Drive motor; 12. Housing; 13. Gear fixing box; 14. Connecting sleeve; 15. Circuit board; 16. Switch button.

[0026] Gearbox assembly: 21, sun gear, 22, planetary gears. Transmission assembly: 31, lower ball bearing, 32, middle ball bearing; 33, mini gear, 332, transmission gear.

[0027] 40. Collet assembly; 41. Snap-fit ​​groove; 42. Upper ball bearing; 50. Straight handpiece; 51. Tapered portion; 52. Straight barrel portion; 53. Clamping portion; 60. Angle handpiece. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0029] See also Figures 1 to 3The figure shows a PMTC dental polisher, including: a drive motor 11, a reduction gear assembly, a transmission assembly, and a chuck assembly 40. The output shaft of the drive motor 11 is connected to the center hole of the reduction gear assembly by a transmission connection, and the reduction gear assembly, transmission assembly, and chuck assembly 40 are sequentially connected by transmission from bottom to top; a shell 12 and a handpiece, the handpiece is sleeved on the outer periphery of the chuck assembly 40, and the shell 12 is arranged on the outer periphery of the drive motor 11 and is located above the handpiece.

[0030] The drive motor 11 of the utility model drives the reduction gearbox assembly, the transmission assembly, and the chuck assembly 40 to rotate coaxially in sequence, ensuring sufficient power and precise transmission; the head arranged on the periphery can clamp the oral tools installed in the chuck assembly 40, and the outer shell 12 has protective and aesthetic functions.

[0031] In this preferred embodiment, the reduction gear assembly includes a pair of sun gears 21 and several pairs of planetary gears 22. The sun gears 21 are coaxially arranged longitudinally, and each pair of planetary gears 22 is coaxially arranged longitudinally. Each of the planetary gears 22 meshes with the sun gears 21. Preferably, three planetary gears 22 are provided. The reduction gear assembly utilizes a planetary gearbox, allowing the oral tool installed in the chuck assembly 40 to have a high rotational speed. The reduction gear assembly utilizes a planetary gear set for speed reduction, enabling all reduction ratios to be achieved. The reduction ratio is designed based on the speed required for the function, meeting various operational requirements.

[0032] In this preferred embodiment, the transmission assembly includes a plurality of ball bearings and at least one pair of mini gears 33. The central axis between the pair of mini gears 33 is arranged longitudinally, and the pair of mini gears 33 are arranged opposite to each other and connected by meshing transmission. The bottom of the pair of mini gears 33 is connected to the reduction gear assembly through at least one lower ball bearing 31, and the top of the pair of mini gears 33 is connected to the chuck assembly 40 through at least one middle ball bearing 32.

[0033] Furthermore, the mini-gear 33 comprises a cylindrical disk and a plurality of transmission teeth 332 arranged longitudinally on the outer periphery of the top of the cylindrical disk in a circumferential array. Specifically, the transmission teeth 332 have a longitudinal cross-section that forms an isosceles triangle. The transmission teeth 332 of the upper and lower mini-gears 33 are arranged opposite each other and mesh with each other. This pair of longitudinally meshing mini-gears 33 provides more precise transmission and smoother tool operation.

[0034] In this preferred embodiment, the handpiece is a straight handpiece 50, comprising a tapered portion 51, a straight cylindrical portion 52, and a clamping portion 53. The bottom of the tapered portion 51 is disposed at the top of the housing 12, and the straight cylindrical portion 52 is coaxially disposed at the top of the tapered portion 51. The tapered portion 51 and the coaxial straight cylindrical portion 52 are disposed in the lower middle portion, and the clamping portion 53 is radially disposed at the top of the inner annular surface of the straight cylindrical portion 52. The outer diameter of the straight handpiece 50 is tapered, and when assembled with an oral tool, it is secured to a trumpet-shaped opening to prevent rotation of the oral tool.

[0035] Combine Figure 4 In another embodiment of the present invention when in use, the handpiece is a curved handpiece 60, that is, the straight handpiece 50 is removed and the clip-on curved handpiece 60 is installed; the bottom of the curved handpiece 60 is clipped to the top of the housing 12, and the outer periphery of the chuck assembly 40 and the middle part of the inner ring surface of the curved handpiece 60 are also connected through the upper ball bearing.

[0036] In this preferred embodiment, the upper and middle portions of the chuck assembly 40 are provided with a plurality of engaging grooves 41 arranged in a circular array, extending longitudinally. The bottom portion of the chuck assembly 40 is drivingly connected to the central axes of the pair of mini-gears 33, while the outer periphery of the chuck assembly 40 is coupled to the tapered portion 51 of the straight handpiece 50 via an upper ball bearing 42. These engaging grooves 41 of the chuck assembly 40 provide a self-locking mechanism for the oral tool, eliminating repeated disassembly steps during treatment. The upper ball bearing 42, the middle ball bearing 32, and the lower ball bearing 31 secure the drive shaft in coaxial rotation during operation.

[0037] In this preferred embodiment, a gear fixing box 13 is provided on the outer periphery of the transmission assembly, and the gear fixing box 13 is connected to the upper outer periphery of the driving motor 11 via a coupling sleeve 14 .

[0038] Furthermore, the housing 12 is disposed on the outer periphery of the driving motor 11 , and a circuit board 15 and a switch button 16 are disposed at the bottom of the driving motor 11 .

[0039] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A PMTC dental polishing machine, characterized in that: include: A driving motor, a reduction gearbox assembly, a transmission assembly, and a chuck assembly, wherein the output shaft of the driving motor is connected to the center hole of the reduction gearbox assembly by a transmission connection, and the reduction gearbox assembly, the transmission assembly, and the chuck assembly are sequentially connected by a transmission connection from bottom to top; A shell and a machine head, wherein the machine head is sleeved on the outer periphery of the chuck assembly, and the shell is arranged on the outer periphery of the driving motor and is located above the machine head.

2. A PMTC dental polishing machine as claimed in claim 1, characterized in that: The reduction gearbox assembly includes a pair of sun gears and several pairs of planetary gears. The pair of sun gears are coaxially arranged along the longitudinal direction, and each pair of planetary gears are coaxially arranged along the longitudinal direction. Several planetary gears are respectively meshed with the pair of sun gears for transmission.

3. A PMTC dental polishing machine as claimed in claim 1, characterized in that: The transmission assembly includes several ball bearings and at least one pair of mini gears. The central axis between the pair of mini gears is arranged longitudinally, and the pair of mini gears are arranged opposite to each other and connected by meshing transmission. The bottom of the pair of mini gears is connected to the reduction box assembly through at least one lower ball bearing, and the top of the pair of mini gears is connected to the chuck assembly through at least one middle ball bearing.

4. A PMTC dental polishing machine as claimed in claim 3, characterized in that: The mini gear comprises a cylindrical disk and a plurality of transmission teeth, wherein the plurality of transmission teeth are longitudinally arranged on the outer periphery of the top end of the cylindrical disk in a circumferential array.

5. A PMTC dental polishing machine as claimed in claim 1, characterized in that: The machine head is a straight machine head, which includes a conical part, a straight cylindrical part, and a clamping part. The bottom of the conical part is arranged at the top of the outer shell, and the straight cylindrical part is coaxially arranged at the top of the conical part. The conical part and the coaxial straight cylindrical part are arranged in the middle and lower part, and the clamping part is radially arranged at the top of the inner annular surface of the straight cylindrical part.

6. A PMTC dental polishing machine as claimed in claim 1, characterized in that: The handpiece is an angled handpiece, and the bottom of the angled handpiece is clamped with the top of the shell.

7. A PMTC dental polishing machine as claimed in claim 4, characterized in that: A plurality of snap-in grooves are provided in a circular array in the middle and upper part of the chuck assembly, and the snap-in grooves extend in the longitudinal direction; the bottom of the chuck assembly is transmission-connected to the central axis of a pair of mini gears, and the outer periphery of the chuck assembly is connected to the conical part of the straight machine head through an upper ball bearing.

8. A PMTC dental polishing machine as claimed in claim 1, characterized in that: A gear fixing box is provided on the outer periphery of the transmission assembly, and the gear fixing box is connected to the outer periphery upper portion of the driving motor through a connecting sleeve.

9. A PMTC dental polishing machine as claimed in claim 1, characterized in that: The housing is arranged on the periphery of the driving motor, and a circuit board and a switch button are arranged on the bottom of the driving motor.

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