Nutating transmission structure

Abstract

The invention discloses a nutating transmission structure, comprising an output gear, a nutating crankshaft, a roller bearing, a nutating gear and an internal gear body, the nutating crankshaft comprising a matching section, the matching section being tilted, the nutating gear being mounted on the matching section of the nutating crankshaft, the roller bearing being located between the nutating gear and the matching section, the output gear and the internal gear body being respectively mounted on opposite ends of the nutating gear and respectively meshing with the nutating gear, the nutating gear, the internal gear body and the output gear forming a reduction structure, the nutating crankshaft driving the output gear to rotate through the nutating gear and increasing the torque of the output gear, through the above design, the dental handpiece adopts the nutating transmission, the output torque of the output gear is large and the power output is stable.

Description

Technical Field

[0001] The invention relates to a dental mobile phone, in particular to a nutating transmission structure. Background Art

[0002] As people become more aware of their teeth, they often clean, fill and grind their teeth to achieve an ideal state. The most commonly used dental instrument is the dental handpiece. Dental handpieces are divided into slow handpieces and high-speed handpieces. The principle is that they can blow the turbine with a certain air pressure, and then drive the needle to run at a high speed. However, this pneumatic transmission method makes the torque transmitted by the dental handpiece during the transmission process low, and the transmission output is not stable, which is not suitable for some diagnostic and treatment operations that require a large torque. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a nutating transmission structure with large output torque and stable power output.

[0004] One of the purposes of the present invention is achieved by the following technical solution:

[0005] A nutating transmission structure comprises an output gear, a nutating crankshaft, a roller bearing, a nutating gear and an internal gear body, wherein the nutating crankshaft comprises a matching section, the matching section is tilted, the nutating gear is mounted on the matching section of the nutating crankshaft, the roller bearing is located between the nutating gear and the matching section, the output gear and the internal gear body are respectively mounted on opposite ends of the nutating gear and are respectively meshed with the nutating gear, the nutating gear, the internal gear body and the output gear form a reduction structure, and the nutating crankshaft drives the output gear to rotate through the nutating gear and increases the torque of the output gear.

[0006] Furthermore, the nutating transmission structure also includes a transmission member and a connecting assembly, the connecting assembly includes a connecting pin, and the nutating crankshaft also includes a connecting section, the connecting section extends from the mating section, the connecting section is coaxial with the transmission member, and the transmission member and the connecting section are connected via the connecting pin.

[0007] Furthermore, the transmission member is a fork.

[0008] Furthermore, the connecting section is provided with a connecting hole, the transmission member is provided with a slot, the connecting pin is located in the connecting hole and both ends are located in the slot.

[0009] Furthermore, the connecting assembly also includes a snap ring, which is sleeved on the outer wall of the transmission member and located at the end of the slot to prevent the connecting pin from being separated from the slot.

[0010] Furthermore, the connecting assembly also includes an elastic member, which is accommodated in the transmission member and has two ends that respectively contact with the transmission member and the connecting section.

[0011] Furthermore, the nutating transmission structure also includes a bearing assembly, the nutating transmission structure also includes a bearing assembly, the bearing assembly includes a third bearing, and the third bearing is sleeved on the connecting section and located between the connecting section and the nutating gear.

[0012] Furthermore, the nutating crankshaft also includes an installation section, which extends from the mating section, and the axis of the installation section is parallel to the horizontal plane. The nutating transmission structure also includes a bearing assembly, and the bearing assembly includes a second bearing, which is sleeved on the installation section and located between the installation section and the output gear.

[0013] Furthermore, the nutating transmission structure also includes a housing and a bearing assembly, the nutating gear is located inside the housing, the nutating crankshaft, the output gear, and the internal gear body are partially accommodated inside the housing, the bearing assembly includes a first bearing and a retaining spring, the first bearing is sleeved on the output gear, the first bearing is located between the output gear and the housing, the retaining spring is installed on the output gear and interferes with the first bearing to prevent the first bearing from detaching from the housing and the output gear.

[0014] Furthermore, the bearing assembly also includes a ball, and the ball is located between the housing and the output gear.

[0015] Compared with the prior art, the nutating transmission structure of the present invention also includes a nutating crankshaft, a roller bearing, a nutating gear and an internal gear body. The nutating crankshaft includes a matching section, which is tilted. The nutating gear is installed on the matching section of the nutating crankshaft. The roller bearing is located between the nutating gear and the matching section. The output gear and the internal gear body are respectively installed on the opposite ends of the nutating gear and are respectively meshed with the nutating gear. The nutating gear, the internal gear body and the output gear form a reduction structure. The nutating crankshaft drives the output gear to rotate through the nutating gear and increases the torque of the output gear. Through the above design, the dental mobile phone adopts nutating transmission, so that the output torque of the output gear is large and the power output is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the nutating transmission structure of the present invention;

[0017] Figure 2 for Figure 1 A three-dimensional diagram of a nutating crankshaft of a nutating transmission structure;

[0018] Figure 3 for Figure 1A three-dimensional diagram of a nutating gear of a nutating transmission structure;

[0019] Figure 4 for Figure 1 A schematic diagram of the internal structure of the nutating transmission structure;

[0020] Figure 5 for Figure 1 A cross-sectional view of a nutating transmission structure.

[0021] In the figure: 10, transmission member; 11, buckle portion; 12, slot; 20, nutating crankshaft; 21, connecting section; 210, connecting hole; 22, matching section; 23, installation section; 30, connecting assembly; 31, connecting pin; 32, snap ring; 33, elastic member; 40, nutating gear; 41, first meshing tooth; 42, second meshing tooth; 50, roller bearing; 60, output gear; 61, third meshing tooth; 70, internal gear body; 71, fourth meshing tooth; 80, housing; 90, bearing assembly; 91, first bearing; 92, retaining spring; 93, ball; 94, second bearing; 95, third bearing. DETAILED DESCRIPTION

[0022] 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.

[0023] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component through which it is fixed. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] Figures 1 to 5The nutating transmission structure of the present invention is applied to a dental handpiece, so that the output torque of the dental handpiece becomes larger and the output force is stable, so that the dental handpiece is suitable for some diagnostic and treatment operations with greater torque requirements.

[0026] The nutating transmission structure of the present invention includes a transmission member 10 , a nutating crankshaft 20 , a connecting assembly 30 , a nutating gear 40 , a roller bearing 50 , an output gear 60 , an internal gear body 70 , a housing 80 and a bearing assembly 90 .

[0027] The transmission member 10 is a fork in this embodiment. The transmission member 10 is cylindrical. The transmission member 10 is provided with a buckle portion 11 and a slot 12. The buckle portion 11 and the slot 12 are respectively located at opposite ends of the transmission member 10. The extending direction of the slot 12 is parallel to the axial direction of the transmission member 10.

[0028] The nutating crankshaft 20 includes a connecting section 21, a matching section 22 and a mounting section 23. The connecting section 21 and the mounting section 23 extend from both ends of the matching section 22 respectively. The matching section 22 is arranged at an angle, and the connecting section 21 and the mounting section 23 are parallel to each other and located on different straight lines. The connecting section 21 is provided with a connecting hole 210. The connecting hole 210 is located at one end of the connecting section 21 away from the matching section 22.

[0029] The connecting assembly 30 includes a connecting pin 31, a snap ring 32 and an elastic member 33. The elastic member 33 is a spring.

[0030] The nutating gear 40 is provided with a first meshing tooth 41 and a second meshing tooth 42. The first meshing tooth 41 and the second meshing tooth 42 are respectively located at two pairs of ends of the nutating gear 40.

[0031] The output gear 60 is provided with a third meshing tooth 61 , and the third meshing tooth 61 is located at an end of the output gear 60 .

[0032] 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 .

[0033] The bearing assembly 90 includes a first bearing 91 , a retaining spring 92 , a ball 93 , a second bearing 94 , and a third bearing 95 .

[0034] When assembling the nutating transmission structure, the roller bearing 50 is installed on the matching section 22 of the nutating crankshaft 20, and the nutating gear 40 is installed on the roller bearing 50. At this time, the roller bearing 50 is located between the matching section 22 and the nutating gear 40. The third bearing 95 is installed on the connecting section 21 near the matching section 22, and the internal gear body 70 is installed on the nutating crankshaft 20. The fourth meshing teeth 71 of the internal gear body 70 mesh with the second meshing teeth 42 of the nutating gear 40. At this time, the third bearing 95 is located between the internal gear body 70 and the nutating crankshaft 20, reducing the friction between the internal gear body 70 and the nutating crankshaft 20. The second bearing 94 is installed on the mounting section 23 of the nutating crankshaft 20. The output gear 60 is installed on the nutating crankshaft 20, and the third meshing teeth 61 mesh with the first meshing teeth 41 of the nutating gear 40. At this time, the second bearing 94 is located between the output gear 60 and the nutating crankshaft 20, reducing the 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 installed outside the internal gear body 70, the nutating gear 40 and the output gear 60, and the ball 93 is located between the corner of the output gear 60 and the housing 80 to reduce the 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 is located between the output gear 60 and the housing 80 to reduce the friction between the output gear 60 and the housing 80. The retaining ring 92 is fixed to the output end of the output gear 60 and is 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, and the connecting pin 31 is installed in the connecting hole 210 of the nutating crankshaft 20, and the two ends of the connecting pin 31 are located in the slot 12. The retaining ring 32 is sleeved on the transmission member 10 and is located at the end of the slot 12 to prevent the connecting pin 31 from escaping from the slot 12, so that the transmission member 10 is connected to the nutating crankshaft 20. At this time, the two ends of the elastic member 33 respectively contact the transmission member 10 and the nutating crankshaft 20 to reduce vibration.

[0035] When the nutating transmission structure is used, the transmission member 10 cooperates with other parts through the buckle part 11 to input power. The transmission member 10 drives the nutating crankshaft 20 to rotate, and the nutating crankshaft 20 drives the nutating gear 40 to rotate. Since the nutating gear 40, the output gear 60 and the internal gear body 70 form a reduction structure, the nutating gear 40 drives the output gear 60 to rotate and the output torque of the output gear 60 is large and the power output is stable, so that the dental handpiece is suitable for some diagnostic and treatment operations with large torque requirements.

[0036] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. A nutating transmission structure, comprising an output gear, characterized in that: The nutating transmission structure also includes a nutating crankshaft, a roller bearing, a nutating gear and an internal gear body, the nutating crankshaft includes a matching section, the matching section is tilted, the nutating gear is installed on the matching section of the nutating crankshaft, the roller bearing is located between the nutating gear and the matching section, the output gear and the internal gear body are respectively installed on opposite ends of the nutating gear and are respectively meshed with the nutating gear, the nutating gear, the internal gear body and the output gear form a reduction structure, the nutating crankshaft drives the output gear to rotate through the nutating gear and increases the torque of the output gear; The nutating transmission structure further includes a transmission member and a connecting assembly, the connecting assembly includes a connecting pin, the nutating crankshaft further includes a connecting section, the connecting section extends from the matching section, the connecting section is coaxial with the transmission member, and the transmission member and the connecting section are connected via the connecting pin; The nutating transmission structure further comprises a bearing assembly, wherein the bearing assembly comprises a third bearing, wherein the third bearing is sleeved on the connecting section and is located between the connecting section and the nutating gear; The nutating crankshaft further includes a mounting section, the mounting section extends from the mating section, the axis of the mounting section is parallel to the horizontal plane, the nutating transmission structure further includes a bearing assembly, the bearing assembly includes a second bearing, the second bearing is sleeved on the mounting section and located between the mounting section and the output gear; The nutating transmission structure also includes a housing and a bearing assembly, the nutating gear is located inside the housing, the nutating crankshaft, the output gear, and the internal gear body are partially accommodated inside the housing, the bearing assembly includes a first bearing and a retaining spring, the first bearing is sleeved on the output gear, the first bearing is located between the output gear and the housing, the retaining spring is installed on the output gear and conflicts with the first bearing to prevent the first bearing from detaching from the housing and the output gear.

2. The nutating transmission structure according to claim 1, characterized in that: The transmission member is a fork.

3. The nutating transmission structure according to claim 1, characterized in that: The connecting section is provided with a connecting hole, the transmission member is provided with a slot, the connecting pin is located in the connecting hole and both ends are located in the slot.

4. The nutating transmission structure according to claim 3, characterized in that: The connecting assembly also includes a snap ring, which is sleeved on the outer wall of the transmission member and located at the end of the slot to prevent the connecting pin from being separated from the slot.

5. The nutating transmission structure according to claim 1, characterized in that: The connecting assembly further comprises an elastic member, which is accommodated in the transmission member and has two ends which respectively contact with the transmission member and the connecting section.

6. The nutating transmission structure according to claim 1, characterized in that: The bearing assembly further includes a ball, and the ball is located between the housing and the output gear.

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