Speed-increasing dental handpiece with quick-release elevation handpiece and three-stage speed change
By adopting a quick-release tilt head design and a dual-row integrated miniature bearing in the dental handpiece, the problems of bearing misalignment and complex connection in dental handpieces have been solved, achieving the effects of low noise, long life and convenient operation.
Patent Information
- Application Number
- CN202520210769.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2025-01-26
- Filing Date
- 2025-02-10
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-10
AI Technical Summary
Existing dental handpieces with separate bearings are prone to problems such as bearing misalignment, unbalanced force, excessive vibration, excessive noise, and short service life. In addition, the connection between the handpiece head and the body is complicated, making disassembly and assembly inconvenient and operation difficult.
The machine head adopts a quick-release tilt angle design. By setting a double-row integrated miniature bearing on the transmission shaft on the output side of the speed-increasing gear set, and connecting the output end of the machine head to the front end of the machine body at a tilt angle greater than 95°, the machine head and the machine body are connected by a quick-release mechanism. The above problems are solved by using a double-row integrated miniature bearing and a quick-release mechanism.
It effectively avoids the misalignment and force imbalance problems of split bearings, reduces vibration and noise, improves service life, and facilitates quick disassembly and operation of the machine head, making it easier for the bur to penetrate deep into the patient's oral cavity.
Smart Images
Figure CN223900859U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to dental medical instrument technical field, concretely is a kind of speed-increasing dental handpiece with quick-release elevation angle handpiece and three-stage speed change. BACKGROUND
[0002] Dental handpiece is a commonly used oral medical instrument, is used to drill, cut, polish, polish and so on to the tooth of patient operation.Dental handpiece is usually divided into high-speed dental handpiece and low-speed dental handpiece, wherein high-speed dental handpiece is usually driven by compressed air to drive turbine high-speed rotation, and output speed is higher, but torque is lower, cannot be applicable to some application scenarios needing larger torque.Low-speed dental handpiece is usually driven by motor, and the torque generated is larger, in some use scenarios, dental handpiece needs to provide larger torque, and dental handpiece can also realize higher output speed, which generally needs to set speed-increasing gear assembly on the transmission mechanism in the dental handpiece body to realize, for many speed-increasing gear assemblies with higher speed-increasing multiple, the speed of transmission shaft on output side can reach very high, so there are higher requirements for its bearing, but the prior art is generally by setting one bearing at both ends of the transmission shaft, and the two bearings are split structure, when high-speed rotating, this split bearing is prone to problems such as bearing misalignment, unbalanced stress, larger vibration, larger noise, shorter service life and the like, and assembly difficulty is larger, and the requirement for assembly precision is particularly high, which can easily lead to higher product failure rate;In addition, the dental handpiece of prior art, handpiece and machine body front end are generally perpendicular or substantially perpendicular angle, leading to inconvenient operation, and the connecting structure of handpiece and machine body is relatively complex, and it is inconvenient to disassemble and assemble, and handpiece is not convenient for quick replacement. SUMMARY
[0003] In order to overcome the above-mentioned deficiencies of the prior art, the task of the utility model is to provide a speed-increasing dental handpiece with quick-release elevation angle handpiece and three-stage speed change.
[0004] The utility model task is realized through the following technical schemes:
[0005] The utility model provides a kind of speed-increasing dental handpiece with quick-release elevation angle head and three-stage speed change, including head and machine body, head is connected in the front end of machine body by quick-release mechanism, rotatably connected with machine core in head, transmission mechanism is equipped in machine body, transmission mechanism includes first transmission shaft, primary gear set, second transmission shaft, secondary gear set, third transmission shaft, tertiary gear that are sequentially transmission-connected from back to front, the rear end of first transmission shaft is equipped with the adapter for transmission connection motor, tertiary gear and the gear of the outside of machine core are mutually meshing bevel gear set to make the output end of head and the front end of machine body present more than 95 ° elevation angle, each transmission shaft is rotatably connected with machine body by bearing, at least one gear set is speed-increasing gear set, and transmission shaft on the output side of speed-increasing gear set is rotatably connected with machine body by double-row integrated micro bearing, double-row integrated micro bearing includes cylindrical bearing outer ring, one coaxial bearing inner ring is respectively equipped in the inside of the both ends of bearing outer ring, one coaxial cylindrical retainer is respectively equipped between each bearing inner ring and bearing outer ring, the inside and outside of retainer are respectively provided with gap between bearing inner ring and bearing outer ring, a plurality of through holes that pass through the inside and outside wall of retainer are spaced apart along the circumference and are provided on the retainer, one rotatable rolling element is respectively arranged in each through hole, the inside and outside of rolling element are respectively attached to bearing inner ring and bearing outer ring, and bearing inner ring and bearing outer ring are rotatably connected by each rolling element.
[0006] As a preferred technical solution, the primary gear set is a speed-increasing gear set, including a primary input gear disposed on the front end of the first transmission shaft and a primary output gear disposed on the second transmission shaft, wherein the tooth number ratio of the primary input gear to the primary output gear is greater than 1 to achieve the speed-increasing effect, and the second transmission shaft is rotatably connected to the machine body by the double-row integrated micro bearing.
[0007] As a preferred technical solution, the primary input gear is an inner ring gear, and the primary output gear is located inside the inner ring gear and meshes with it.
[0008] As a preferred technical solution, the tooth number ratio of the primary input gear to the primary output gear is 5:1.
[0009] As a preferred technical solution, the relative circumferential surfaces of the bearing inner ring and the bearing outer ring are respectively provided with annular grooves for partially embedding each rolling element to limit the rolling element.
[0010] As a preferred technical solution, the secondary gear set includes a secondary input gear disposed on the front end of the second transmission shaft and a secondary output gear disposed on the third transmission shaft, wherein the secondary input gear and the secondary output gear are mutually meshing bevel gear sets to make the front section of the machine body and the rear section of the machine body present an elevation angle greater than 0°.
[0011] As a preferred technical scheme, the quick release mechanism is a plug-in structure, comprising a plug-in barrel fixedly arranged at the rear end of the handpiece, a machine body shell and a shaft barrel fixedly arranged at the front end of the machine body, an annular plug-in cavity for the plug-in barrel to be inserted is formed between the machine body shell and the shaft barrel, an arc-shaped elastic sheet is arranged outside the shaft barrel, the arc top of the arc-shaped elastic sheet protrudes into the plug-in cavity and can elastically abut against the plug-in barrel, and the third transmission shaft passes through the shaft barrel and is rotatably connected with the shaft barrel through a bearing.
[0012] The utility model discloses a kind of speed-increasing dental handpieces with quick-release elevation angle handpiece and three-stage speed change, with following beneficial effects: by the transmission shaft of the output side of speed-increasing gear set is provided with double-row integrated micro bearing, one coaxial bearing inner ring is respectively arranged in the both ends of bearing outer ring, and one coaxial cylindrical retainer is respectively arranged between each bearing inner ring and bearing outer ring, rolling element is arranged in the each through hole of retainer, to effectively avoid the problems of bearing misalignment, stress imbalance, larger vibration, larger noise, short service life and the like of split bearing, and it is convenient to assemble, and it is not prone to defective rate;By setting the elevation angle between handpiece output end and machine body front end is greater than 95 °, so that it is convenient to insert the drill needle on the machine core into the deep of patient's oral cavity during operation, and convenient to operate;By setting handpiece and machine body are connected by quick-release mechanism, to facilitate quick disassembly and replacement of handpiece during use.
[0013] The concept, specific structure and effects of the utility model will be further described below with reference to the drawings, so as to fully understand the purpose, features and effects of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the external structure schematic diagram of the speed-increasing dental handpiece with quick-release elevation angle handpiece and three-stage speed change in embodiment;
[0015] Figure 2 It is Figure 1 Longitudinal section structure schematic diagram;
[0016] Figure 3 It is Figure 1 External structure schematic diagram of double-row integrated micro bearing in it;
[0017] Figure 4 It is Figure 3 Section structure schematic diagram of it;
[0018] Figure 5 It is Figure 3 Exploded structure schematic diagram of it.
[0019] Wherein: head 1, core 11, plug-in barrel 12, needle 13, body 2, first transmission shaft 21, adapter 211, primary gear set 22, primary input gear 221, primary output gear 222, second transmission shaft 23, secondary gear set 24, secondary input gear 241, secondary output gear 242, third transmission shaft 25, tertiary gear 26, double-row integrated micro bearing 27, bearing outer ring 271, bearing inner ring 272, retainer 273, rolling element 274, annular groove 275, body shell 281, shaft cylinder 282, arcuate spring piece 29. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.
[0021] It should be noted that in the present application, the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, mainly for better description of the present application and its examples, and are not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. In addition, the terms "mounting", "setting", "provided with", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0022] As Figures 1-5As shown, the embodiment provides a speed-increasing dental handpiece with quick-release elevation angle head and three-stage speed change, comprising a head 1 and a body 2, the head 1 is connected to the front end of the body 2 through a quick-release mechanism, a machine core 11 is rotatably connected in the head 1, the machine core 11 is used for installing a needle 13, a transmission mechanism is arranged in the body 2, the transmission mechanism comprises a first transmission shaft 21, a first gear set 22, a second transmission shaft 23, a second gear set 24, a third transmission shaft 25 and a third gear 26 which are sequentially and transmissionally connected from back to front, the rear end of the first transmission shaft 21 is provided with an adapter 211 for transmissionally connecting a motor (not shown in the figure), the third gear 26 and the gear arranged outside the machine core 11 are a bevel gear set for mutual engagement so that the output end of the head 1 and the front end of the body 2 form an elevation angle greater than 95°, each transmission shaft is rotatably connected with the body through a bearing, at least one gear set is a speed-increasing gear set, and at least one transmission shaft located on the output side of the speed-increasing gear set is rotatably connected with the body 2 through a double-row integrated micro bearing 27, the double-row integrated micro bearing 27 comprises a cylindrical bearing outer ring 271, coaxial bearing inner rings 272 are arranged on the inner sides of the two ends of the bearing outer ring 271, respectively, a cylindrical retainer 273 is arranged between each bearing inner ring 272 and the bearing outer ring 271, respectively, the inner and outer sides of the retainer 273 have gaps between the bearing inner ring 272 and the bearing outer ring 271, respectively, a plurality of through holes penetrating the inner and outer side walls of the retainer 273 are arranged on the retainer 273 in a circumferential direction, a rolling element 274 capable of freely rotating is arranged in each through hole, respectively, the inner and outer sides of the rolling element 274 are attached to the bearing inner ring 272 and the bearing outer ring 271, respectively, and the bearing inner ring 272 and the bearing outer ring 271 are rotatably connected through each rolling element 274. In the embodiment, the rolling element 274 is a ball, and in other embodiments, the rolling element can also be a roller or other structures capable of rolling.
[0023] The speed-increasing dental handpiece provided by the embodiment can effectively avoid the problems of bearing misalignment, unbalanced stress, large vibration, large noise and short service life which are prone to occur in split bearings, and is easy to assemble and has low defective rate; the output end of the head 1 and the front end of the body 2 form an elevation angle greater than 95°, so that the needle on the machine core 11 can be easily inserted into the patient's mouth during operation; the head 1 and the body 2 are connected through a quick-release mechanism, so that the head 1 can be quickly disassembled and replaced during use.
[0024] As one of the preferred schemes, the primary gear set 22 is a speed increasing gear set, comprising a primary input gear 221 arranged at the front end of the first transmission shaft 21 and a primary output gear 222 arranged on the second transmission shaft 23, wherein the tooth number ratio of the primary input gear 221 to the primary output gear 222 is 5:1, so that the rotation speed of the primary output gear 222 and the second transmission shaft 23 is increased to 5 times of the rotation speed of the primary input gear 221 and the first transmission shaft 21, and the second transmission shaft 23 is rotatably connected with the fuselage 2 through the double-row integrated micro bearing 27, preferably, the primary input gear 221 is an inner ring gear, and the primary output gear 222 is located in the inner ring gear and engaged with the inner ring gear, which can make the structure of the primary gear set 22 more compact.
[0025] As one of the preferred schemes, the relative circumferential surfaces of the bearing inner ring 272 and the bearing outer ring 271 are respectively provided with annular grooves 275 for partially embedding the rolling elements 274 to limit the rolling elements 274.
[0026] As one of the preferred schemes, the secondary gear set 24 comprises a secondary input gear 241 arranged at the front end of the second transmission shaft 23 and a secondary output gear 242 arranged on the third transmission shaft 25, wherein the secondary input gear 241 and the secondary output gear 242 are a bevel gear set engaged with each other to make the front section of the fuselage 2 and the rear section of the fuselage 2 have an elevation angle greater than 0°.
[0027] As one of the preferred schemes, the quick release mechanism is a plug-in structure, comprising a plug-in barrel 12 fixedly arranged at the rear end of the head 1, a fuselage shell 281 and a shaft barrel 282 fixedly arranged at the front end of the fuselage 2, an annular plug-in cavity for inserting the plug-in barrel 12 is formed between the fuselage shell 281 and the shaft barrel 282, and an arc-shaped elastic sheet 29 is arranged outside the shaft barrel 282, the arc top of the arc-shaped elastic sheet 29 protrudes into the plug-in cavity to elastically abut against the inserted plug-in barrel 12, the third transmission shaft 25 penetrates out of the shaft barrel 282 and is rotatably connected with the shaft barrel 282 through a bearing, the tertiary gear 26 is connected to the front end of the third transmission shaft 25 and exposed at the front end of the shaft barrel 282, and when the plug-in barrel 12 on the head 1 is plugged into the set position of the annular plug-in cavity on the fuselage 2, the tertiary gear 26 and the gear arranged outside the movement core 11 are engaged with each other.
[0028] The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
Claims
1. A speed increasing dental handpiece having a quick release angle head and a three stage speed variation, characterized in that, The application relates to a camera, which comprises a head and a body, the head is connected to the front end of the body through a quick-release mechanism, a machine core is rotatably connected in the head, a transmission mechanism is arranged in the body, the transmission mechanism comprises a first transmission shaft, a primary gear set, a second transmission shaft, a secondary gear set, a third transmission shaft and a tertiary gear which are sequentially and transmissionally connected from back to front, the rear end of the first transmission shaft is provided with an adapter for transmissionally connecting a motor, the tertiary gear and a gear arranged outside the machine core are a bevel gear set which is in meshing connection so that the output end of the head and the front end of the body form an elevation angle greater than 95 DEG, each transmission shaft is rotatably connected with the body through a bearing, at least one gear set is a speed-increasing gear set, and a transmission shaft located at the output side of the speed-increasing gear set is rotatably connected with the body through a double-row integrated micro bearing, the double-row integrated micro bearing comprises a cylindrical bearing outer ring, coaxial bearing inner rings are arranged at the inner sides of the two ends of the bearing outer ring, a cylindrical retainer is arranged between each bearing inner ring and the bearing outer ring, gaps are formed between the inner and outer sides of the retainer and the bearing inner ring and the bearing outer ring, a plurality of through holes penetrating the inner and outer side walls of the retainer are arranged on the retainer in a circumferential direction, a rolling element capable of freely rotating is arranged in each through hole, the inner and outer sides of the rolling element are in close contact with the bearing inner ring and the bearing outer ring, and the bearing inner ring and the bearing outer ring are rotatably connected through the rolling elements.
2. The speed increasing dental handpiece with quick release angle head and three stage speed variation as claimed in claim 1 wherein, The primary gear set is a speed-increasing gear set, which comprises a primary input gear arranged at the front end of the first transmission shaft and a primary output gear arranged on the second transmission shaft, wherein the tooth number ratio of the primary input gear to the primary output gear is greater than 1 to realize the speed-increasing effect, and the second transmission shaft is rotatably connected with the body through the double-row integrated micro bearing.
3. The speed increasing dental handpiece with quick release angle head and three stage speed variation as claimed in claim 2 wherein, The primary input gear is an inner ring gear, and the primary output gear is located in the inner ring gear and is in meshing connection with the inner ring gear.
4. The speed increasing dental handpiece with quick release angle head and three stage speed variation as claimed in claim 2 wherein, The tooth number ratio of the primary input gear to the primary output gear is 5:
1.
5. The speed increasing dental handpiece with quick release angle head and three stage speed variation as claimed in claim 1 wherein, The relative circumferential surfaces of the bearing inner ring and the bearing outer ring are respectively provided with annular grooves for partially embedding each rolling element to limit the rolling element.
6. The speed increasing dental handpiece with quick release angle head and three stage speed variation as claimed in claim 1 wherein, The secondary gear set comprises a secondary input gear arranged at the front end of the second transmission shaft and a secondary output gear arranged on the third transmission shaft, wherein the secondary input gear and the secondary output gear are a bevel gear set which is in meshing connection so that the front section of the body and the rear section of the body form an elevation angle greater than 0 DEG.
7. The speed increasing dental handpiece with quick release angle head and three stage speed variation as claimed in claim 1 wherein, The quick-release mechanism is a plug-in structure, which comprises a plug-in barrel fixedly arranged at the rear end of the head, a body shell and a shaft barrel fixedly arranged at the front end of the body, an annular plug-in cavity for inserting the plug-in barrel is formed between the body shell and the shaft barrel, an arc-shaped elastic sheet is arranged on the outer side of the shaft barrel, the arc top of the arc-shaped elastic sheet protrudes into the plug-in cavity so as to elastically abut against the inserted plug-in barrel, the third transmission shaft penetrates out of the shaft barrel and is rotatably connected with the shaft barrel through a bearing, and the tertiary gear is connected to the front end of the third transmission shaft and is exposed at the front end of the shaft barrel.