CN112555389A

CN112555389A - Nutation transmission structure

Info

Publication number: CN112555389A
Application number: CN202011464495.5A
Authority: CN
Inventors: 黄家炽
Original assignee: Modern Precision Dental Instruments Co ltd
Current assignee: Modern Precision Dental Instruments Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-03-26

Abstract

The invention discloses a nutation transmission structure, which comprises an output gear, a nutation crankshaft, a roller bearing, a nutation gear and an inner gear body, wherein the nutation crankshaft comprises a matching section, the matching section is obliquely arranged, the nutation gear is arranged at the matching section of the nutation crankshaft, the roller bearing is positioned between the nutation gear and the matching section, the output gear and the inner gear body are respectively arranged at two opposite ends of the nutation gear and are respectively meshed with the nutation gear, the inner gear body and the output gear form a speed reduction structure, and the nutation crankshaft drives the output gear to rotate through the nutation gear and increases the torque of the output gear.

Description

Nutation transmission structure

Technical Field

The invention relates to a dental handpiece, in particular to a nutation transmission structure.

Background

With the increase of awareness of caring about teeth, teeth are often washed, filled and ground to achieve an ideal state. The most common instrument used in dentistry is a dental handpiece. The dental handpiece is divided into a slow handpiece and a high-speed handpiece, and the principle of the dental handpiece is that a turbine can be blown by certain air pressure so as to drive a needle to rotate at a high speed. The pneumatic transmission mode ensures that the torque transmitted by the dental handpiece in the transmission process is lower, the transmission output is not stable, and the dental handpiece is not suitable for some diagnosis and treatment operations with higher requirements on the torque.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a nutation transmission structure which has large output torque and smooth power output.

One of the purposes of the invention is realized by adopting the following technical scheme:

the utility model provides a nutation transmission structure, includes output gear, nutation bent axle, roller bearing, nutation gear and the internal gear body, the nutation bent axle is including the cooperation section, cooperation section slope sets up, nutation gear install in nutation bent axle's cooperation section, roller bearing is located nutation gear with between the cooperation section, output gear and the internal gear body install respectively in nutation gear's relative both ends and respectively with nutation gear engagement, nutation gear the internal gear body and output gear forms the reduction structure, nutation bent axle passes through nutation gear drives output gear rotates and makes output gear's moment of torsion increase.

Further, nutation transmission structure still includes driving medium and coupling assembling, coupling assembling includes the connecting pin, nutation bent axle still includes the linkage segment, the linkage segment is followed the cooperation section extends out, the linkage segment with the driving medium is coaxial, the driving medium with the linkage segment passes through the connecting pin is connected.

Further, the transmission part is a shifting fork.

Further, the connecting section is provided with a connecting hole, the transmission part is provided with a slot, the connecting pin is located in the connecting hole, and two ends of the connecting pin are located in the slot.

Further, coupling assembling still includes the snap ring, the snap ring cover is located the outer wall of driving medium and is located fluting is terminal, prevents the connecting pin breaks away from the fluting.

Further, the connecting assembly further comprises an elastic piece, the elastic piece is contained in the transmission piece, and two ends of the elastic piece are respectively abutted against the transmission piece and the connecting section.

Further, nutation drive structure still includes bearing assembly, bearing assembly includes the third bearing, the third bearing housing is located the linkage segment with between the nutation gear.

Further, the nutation bent axle still includes the installation section, the installation section is followed the cooperation section extends, the axis and the horizontal plane parallel of installation section, nutation transmission structure still includes bearing assembly, bearing assembly includes the second bearing, the second bearing cover is located the installation section with between the output gear.

Further, nutation transmission structure still includes box and bearing assembly, nutation gear is located inside the box, nutation bent axle the output gear the internal gear somatic part accept in inside the box, bearing assembly includes first bearing and jump ring, first bearing cover is located the output gear, first bearing is located output gear and between the box, the jump ring install in output gear and with first bearing is contradicted, prevents first bearing breaks away from the box and output gear.

Further, the bearing assembly further comprises a ball located between the housing and the output gear.

Compared with the prior art, the nutation transmission structure further comprises a nutation crankshaft, the roller bearing, a nutation gear and an inner gear body, wherein the nutation crankshaft comprises a matching section, the matching section is obliquely arranged, the nutation gear is arranged at the matching section of the nutation crankshaft, the roller bearing is positioned between the nutation gear and the matching section, the output gear and the inner gear body are respectively arranged at two opposite ends of the nutation gear and are respectively meshed with the nutation gear, the inner gear body and the output gear form a speed reduction structure, the nutation crankshaft drives the output gear to rotate through the nutation gear and enables the torque of the output gear to be increased, and through the design, the dental handpiece adopts nutation transmission, so that the output torque of the output gear is large and the power output is stable.

Drawings

FIG. 1 is a perspective view of a nutating drive configuration of the present invention;

FIG. 2 is a perspective view of a nutating crankshaft of the nutating transmission of FIG. 1;

FIG. 3 is a perspective view of a nutating gear of the nutating drive configuration of FIG. 1;

FIG. 4 is an internal schematic view of the nutating drive configuration of FIG. 1;

fig. 5 is a cross-sectional view of the nutating drive structure of fig. 1.

In the figure: 10. a transmission member; 11. a fastening part; 12. grooving; 20. a nutating crankshaft; 21. a connecting section; 210. connecting holes; 22. a mating segment; 23. an installation section; 30. a connecting assembly; 31. a connecting pin; 32. a snap ring; 33. an elastic member; 40. a nutating gear; 41. a first meshing tooth; 42. a second meshing tooth; 50. a roller bearing; 60. an output gear; 61. a third meshing tooth; 70. an inner gear body; 71. a fourth meshing tooth; 80. a box body; 90. a bearing assembly; 91. a first bearing; 92. a clamp spring; 93. a ball bearing; 94. a second bearing; 95. and a third bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 to 5 show a nutation transmission structure of the present invention, which is applied to a dental handpiece to increase the output torque and stabilize the output force of the dental handpiece, so that the dental handpiece is suitable for performing some diagnosis and treatment operations requiring a large torque.

The nutating drive structure of the present invention includes a drive member 10, a nutating crankshaft 20, a connecting assembly 30, a nutating gear 40, a roller bearing 50, an output gear 60, an inner gear body 70, a case 80, and a bearing assembly 90.

The transmission member 10 is a fork in this embodiment. The transmission member 10 is cylindrical. The transmission member 10 is provided with a locking portion 11 and a slot 12. The locking portion 11 and the slot 12 are located at two opposite ends of the transmission member 10. The slot 12 extends in a direction parallel to the axial direction of the transmission member 10.

The nutating crankshaft 20 includes a connecting section 21, a mating section 22, and a mounting section 23. The connecting section 21 and the mounting section 23 extend from both ends of the mating section 22. The fitting section 22 is disposed obliquely, and the connecting section 21 and the mounting section 23 are parallel to each other and located on different straight lines. The connection section 21 is provided with a connection hole 210. The connection hole 210 is located at an end of the connection section 21 away from the mating section 22.

The connection assembly 30 includes a connection pin 31, a snap ring 32, and an elastic member 33. The elastic member 33 is a spring.

The nutating gear 40 is provided with a first toothing 41 and a second toothing 42. The first and second meshing

teeth

41 and 42 are located at both ends of the nutating gear 40, respectively.

The output gear 60 is provided with a third meshing tooth 61, the third meshing tooth 61 being located at an end of the output gear 60.

The internal gear body 70 is provided with fourth meshing teeth 71, and the fourth meshing teeth 71 are located at the end of the internal gear body 70.

The bearing assembly 90 includes a first bearing 91, a circlip 92, a ball 93, a second bearing 94, and a third bearing 95.

In assembling the nutating drive structure, the roller bearing 50 is mounted to the mating section 22 of the nutating crankshaft 20 and the nutating gear 40 is mounted to the roller bearing 50 with the roller bearing 50 between the mating section 22 and the nutating gear 40. The third bearing 95 is installed at the connecting section 21 near the fitting section 22, the internal gear body 70 is installed at the nutating crankshaft 20, and the fourth meshing teeth 71 of the internal gear body 70 mesh with the second meshing teeth 42 of the nutating gear 40. The third bearing 95 is now located between the internal gear body 70 and the nutating crankshaft 20, reducing friction between the internal gear body 70 and the nutating crankshaft 20. The second bearing 94 is mounted to the mounting section 23 of the nutating crankshaft 20. The output gear 60 is mounted to the nutating crankshaft 20 and the third meshing teeth 61 mesh with the first meshing teeth 41 of the nutating gear 40. The second bearing 94 is now positioned between the output gear 60 and the nutating crankshaft 20 to reduce friction between the output gear 60 and the nutating crankshaft 20. At this time, the nutating crankshaft 20, the nutating gear 40, the output gear 60, and the internal gear body 70 form a speed reduction structure. The housing 80 is mounted to the outside of the internal gear body 70, the nutating gear 40 and the output gear 60, and the balls 93 are located between the corners of the output gear 60 and the housing 80 to reduce friction between the output gear 60 and the housing 80. The first bearing 91 is sleeved on the output end of the output gear 60 and located between the output gear 60 and the box 80, so as to reduce friction between the output gear 60 and the box 80. The snap spring 92 is fixed to the output end of the output gear 60 and located on one side of the first bearing 91 to prevent the first bearing 91 from moving axially relative to the output gear 60. The elastic member 33 is accommodated in the transmission member 10, the connecting pin 31 is mounted to the connecting hole 210 of the nutating crankshaft 20, and both ends of the connecting pin 31 are located in the slots 12. The snap ring 32 is sleeved on the transmission member 10 and located at the end of the slot 12 to prevent the connecting pin 31 from separating from the slot 12, so that the transmission member 10 is connected with the nutation crankshaft 20. At this time, both ends of the elastic member 33 respectively abut against the driving member 10 and the nutation crankshaft 20, thereby playing a role of damping vibration.

When the nutation transmission structure is used, the transmission member 10 is engaged with other parts through the engaging portion 11 to input power. The transmission part 10 drives the nutation crankshaft 20 to rotate, the nutation crankshaft 20 drives the nutation gear 40 to rotate, and the nutation gear 40 drives the output gear 60 to rotate and enables the output gear 60 to output large torque and stable power output due to the fact that the nutation gear 40, the output gear 60 and the inner gear body 70 form a speed reduction structure, so that the dental handpiece is suitable for diagnosis and treatment operations with large requirements on torque.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the spirit of the invention, and all equivalent modifications and changes can be made to the above embodiments according to the essential technology of the invention, which falls into the protection scope of the invention.

Claims

1. A nutation drive structure, includes output gear, its characterized in that: nutation transmission structure still includes nutation bent axle, roller bearing, nutation gear and the internal gear body, the nutation bent axle is including the cooperation section, cooperation section slope sets up, nutation gear install in nutation bent axle's cooperation section, roller bearing is located nutation gear with between the cooperation section, output gear and the internal gear body install respectively in nutation gear's relative both ends and respectively with nutation gear engagement, nutation gear the internal gear body and output gear forms the reduction structure, nutation bent axle passes through nutation gear drives output gear rotates and makes output gear's moment of torsion increase.

2. The nutating drive structure of claim 1, wherein: nutation transmission structure still includes driving medium and coupling assembling, coupling assembling includes the connecting pin, nutation bent axle still includes the linkage segment, the linkage segment is followed the cooperation section extends out, the linkage segment with the driving medium is coaxial, the driving medium with the linkage segment passes through the connecting pin is connected.

3. The nutating drive structure of claim 2, wherein: the transmission part is a shifting fork.

4. The nutating drive structure of claim 2, wherein: the connecting section is provided with a connecting hole, the transmission part is provided with a slot, the connecting pin is positioned in the connecting hole, and two ends of the connecting pin are positioned in the slot.

5. The nutating drive structure of claim 4, wherein: the connecting assembly further comprises a clamping ring, and the clamping ring is sleeved on the outer wall of the transmission part and located at the tail end of the groove to prevent the connecting pin from being separated from the groove.

6. The nutating drive structure of claim 2, wherein: the connecting assembly further comprises an elastic piece, the elastic piece is contained in the transmission piece, and two ends of the elastic piece are respectively abutted against the transmission piece and the connecting section.

7. The nutating drive structure of claim 2, wherein: the nutation drive structure still includes bearing assembly, bearing assembly includes the third bearing, the third bearing housing is located the linkage segment with between the nutation gear.

8. The nutating drive structure of claim 1, wherein: the nutation crankshaft still includes the installation section, the installation section is followed the cooperation section extends, the axis and the horizontal plane of installation section are parallel, nutation transmission structure still includes bearing assembly, bearing assembly includes the second bearing, the second bearing cover is located the installation section with between the output gear.

9. The nutating drive structure of claim 1, wherein: nutation transmission structure still includes box and bearing assembly, nutation gear is located inside the box, nutation bent axle output gear internal gear somatic part accept in inside the box, bearing assembly includes first bearing and jump ring, first bearing cover is located output gear, first bearing is located output gear and between the box, the jump ring install in output gear and with first bearing is contradicted, prevents first bearing breaks away from the box and output gear.

10. The nutating drive structure of claim 9, wherein: the bearing assembly further includes a ball located between the housing and the output gear.