Dental high-speed turbine handpiece

Abstract

The invention discloses a dental high-speed turbine handpiece. A high-pressure air pipe is arranged in a handpiece body, and a handpiece head covers a shell, a rotary handpiece body, a drill changing mechanism and a control system. The rotating machine body comprises a main shaft cylinder, a chuck device, a driving device and an anti-falling device; the drill changing mechanism is provided with a fixing cylinder, a drill changing cylinder, a first motor, a fixing lead screw and a drill pushing motor. A voice module is arranged in the control system and can receive a drill changing instruction, all parts are accurately controlled to work cooperatively, and designated drill bit changing, positioning and subsequent high-speed rotation are completed. Efficient drill changing is integrally achieved, the treatment time is greatly shortened, and the patient experience is improved; the work intensity and the operation risk of doctors are reduced; the stability and the safety of equipment are enhanced; intelligent operation is introduced, the development requirements of modern oral medical treatment are met, and remarkable innovation is brought to oral treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of oral medical equipment, and in particular relates to a dental high-speed turbine handpiece. Background Art

[0002] In modern dental care, high-speed dental turbine handpieces, as core equipment, are widely used in various treatments, including tooth preparation and caries removal. Consisting primarily of a body, handpiece, and drill bit, they utilize a high-speed rotating drill bit to achieve efficient and precise tooth treatment, serving as a valuable aid for dentists.

[0003] However, in current dental treatment, doctors often need to use multiple different types of drill bits to meet the complex needs of different treatment stages. Whenever a drill bit needs to be changed, the doctor must interrupt the operation, manually remove the current drill bit, and then carefully install the next one. This process is not only cumbersome but also significantly increases the doctor's chairside operation time.

[0004] From the patient's perspective, prolonged chairside treatment not only causes physical discomfort but also increases psychological burden, thus reducing the treatment experience. Especially in dental clinics with high outpatient volumes, physician efficiency directly impacts patient wait times. The time lost in drill bit replacement not only reduces physician efficiency per unit time but also limits the institution's capacity to receive patients, negatively impacting the quality and effectiveness of overall healthcare services.

[0005] Furthermore, frequent manual drill bit changes require a high level of manual dexterity, which can easily lead to fatigue and increase the potential risk of operational errors. In complex treatments, these errors can cause unnecessary damage to the patient's dental tissue.

[0006] With the continuous advancement of dental medical technology and patients' increasing demands for a better treatment experience and efficiency, existing methods for replacing drill bits in dental high-speed turbine handpieces are no longer able to meet real-world clinical needs. Therefore, the development of a new drill bit replacement solution is urgently needed. This solution should aim to reduce chairside operation time, improve treatment efficiency, enhance the patient experience, reduce workload and reduce operational risks, and inject new vitality into the dental industry. Summary of the Invention

[0007] In response to the problems and shortcomings of the above-mentioned prior art, the present invention provides a dental high-speed turbine handpiece, which has the advantages of improving drill bit replacement efficiency, reducing operation time, reducing doctor's workload and operation risks, and improving patient treatment experience.

[0008] The present invention is achieved through the following technical solutions:

[0009] A dental high-speed turbine handpiece comprises a body, a handpiece and various types of drill bits. The body is provided with a high-pressure air pipe, and the handpiece comprises a shell, a rotating body, a drill changing mechanism and a control system. The housing is connected to the machine body, and the rotating body is mounted inside the housing via a bearing assembly. The rotating body includes a main shaft, a chuck device located inside the main shaft, a driving device that drives the chuck device to clamp the drill bit, and an anti-slip device fixed to the bottom of the chuck device. The anti-slip device can prevent the drill bit located in the chuck device from escaping from the chuck device due to its gravity. A drill changing mechanism is fixed to the housing and includes a fixed barrel, a drill changing barrel located inside the fixed barrel, a first motor that drives the drill changing barrel to rotate, a fixed screw, and a drill pushing motor. The control system is provided with a voice module. When the voice module receives a drill changing command, the first motor drives the drill changing barrel to rotate to rotate the designated drill bit to directly above the drill bit to be replaced. The drill pushing motor pushes the designated drill bit vertically downward to the inside of the chuck device to eject the drill bit to be replaced to the outside. The driving device drives the chuck device to circumferentially clamp the outer peripheral surface of the designated drill bit and position the centerline of the drill bit at a position that coincides with the central rotation axis of the main shaft, so that the designated drill bit is driven by high-pressure gas to rotate around the central rotation axis of the main shaft. A fundamental architecture for automated drill changing in high-speed dental turbine handpieces has been established. Through the coordinated operation of various components, the entire process, from receiving drill change commands to completing drill bit replacement and positioning, is fully automated, significantly reducing drill change time and improving treatment efficiency. The introduction of a voice module facilitates operation, reduces manual steps, reduces workload, and improves ease of use and smoother treatment.

[0010] Furthermore, a spindle-shaped cylindrical space for accommodating the chuck device is opened in the main shaft cylinder, and the main shaft cylinder includes an upper cylinder body and a lower cylinder body fixedly mounted to the bottom of the upper cylinder body;

[0011] The outer wall of the chuck device is in the shape of a spindle cylinder and can slide in the vertical direction relative to the spindle cylindrical space to change the size of the inner cavity of the chuck device;

[0012] The drive mechanism consists of a pressure cylinder positioned above the chuck assembly and an electric telescopic rod fixed to the spindle. The inner side of the pressure cylinder is formed with a curved extrusion surface that mates with the chuck assembly. The electric telescopic rod compresses the chuck assembly downward through the pressure cylinder, reducing the diameter of the chuck assembly's internal cavity. The unique spindle-shaped cylindrical space design matches the outer shape of the chuck assembly. Combined with the drive mechanism of the electric telescopic rod and pressure cylinder, the chuck assembly's internal cavity size can be precisely controlled, achieving stable grip for drill bits of varying diameters. This prevents the drill bit from shaking or falling out during high-speed rotation, thereby improving treatment safety and accuracy.

[0013] Furthermore, the chuck assembly includes multiple clamping petals evenly distributed along the circumference of the spindle-shaped cylindrical space. When the chuck assembly is in a clamped state, each clamping petal abuts the drill bit and forms a cylindrical clamping cavity. When the chuck assembly is in a relaxed state, a sliding space exists between adjacent clamping petals. The design of multiple clamping petals enhances the chuck assembly's grip stability on the drill bit. The cylindrical clamping cavity formed in the clamped state fits tightly against the drill bit. The sliding space in the relaxed state facilitates drill bit replacement, allowing a new drill bit to enter the chuck assembly smoothly and the old drill bit to be ejected smoothly, thus optimizing the drill replacement process.

[0014] Furthermore, a guide opening is located at the top center of the chuck assembly, connecting to the cylindrical clamping cavity. Its inner diameter gradually increases vertically upward, while a drill drop hole is located at the bottom center of the fixed tube. The drill drop hole, guide opening, cylindrical clamping cavity, and spindle-shaped cylindrical space are all located on the same central axis. The guide opening's gradually changing inner diameter, coupled with its alignment with the central axes of other components, ensures that during drill changes, the new drill bit can be precisely dropped into the chuck assembly and accurately ejected from the old one. This improves the accuracy and success rate of drill changes and reduces the risk of operational failure or equipment damage due to drill bit misalignment.

[0015] Furthermore, a return spring is installed between each clamping petal and the spindle cylinder. This spring exerts a vertical upward force on the clamping petal. When the pressure cylinder is released from the clamping petal, the petal is relaxed and its outer diameter is at its maximum. This return spring enables the automatic reset function of the chuck assembly. After a drilling operation is completed and the pressure cylinder is released from the clamping petal, the return spring immediately activates, restoring the clamping petal to its relaxed state, ready for the next drill change. This simplifies the equipment's operation and improves its efficiency.

[0016] Furthermore, the drill bit features a raised ring on its exterior, and each clamping petal has an arcuate groove on its inner wall that mates with the raised ring. The combination of the raised ring and the arcuate groove further enhances the chuck's grip on the drill bit, effectively preventing axial displacement during high-speed rotation. This improves the drill bit's operational stability, ensuring smooth treatment and enhancing treatment quality.

[0017] Furthermore, the inner wall of the clamping flap is equipped with a stress-sensing plate, which is connected to the control system. This plate monitors the gripping force of the chuck on the drill bit in real time and feeds this data back to the control system. If the gripping force becomes abnormal, the control system can make timely adjustments, such as alerting the doctor to check or automatically adjusting the extension and retraction of the electric telescopic rod. This ensures that the chuck maintains a secure and stable grip on the drill bit, further ensuring the safety and stability of the treatment process.

[0018] Furthermore, multiple anti-slip devices are evenly distributed along the circumferential direction of the chuck device. The anti-slip devices include a slide fixed to the chuck device, an anti-slip pressure block located within the slide, and a compression spring connecting the anti-slip pressure block and the side wall of the slide. The compression spring has an elastic squeezing force that drives the anti-slip pressure block to move along the slide toward the center of the chuck device. Multiple anti-slip devices provide additional anti-slip protection for the drill bit in all directions. Under the elastic squeezing force of the compression spring, the anti-slip pressure block always presses tightly against the drill bit, preventing the drill bit from accidentally falling off due to its own weight, further improving the safety of the device during use and providing double protection for patients and doctors.

[0019] Furthermore, a housing cavity for holding a drill bit is provided in the drill changing barrel, and a rubber anti-slip pad is attached to the inner wall of the housing cavity. The first motor can drive the drill changing barrel to rotate around its own axis;

[0020] The push drill motor is mounted to the fixed lead screw via a lead screw block. A pressure rod is located on one side of the lead screw block, positioned below the lead screw block. Its central axis coincides with that of the chuck assembly, allowing the push drill motor to move the rod vertically. The drill changer's housing is fitted with a rubber non-slip pad to secure the drill bit. The coordinated design of the push drill motor, lead screw block, and pressure rod ensures precise push drilling, enabling precise placement of a designated drill bit into the chuck assembly to complete the drill change operation and enhance the reliability and accuracy of the drill change mechanism.

[0021] Furthermore, support bearings are installed on the outer wall of the fixed barrel and the inner wall of the main shaft. One end of the fixed screw is fixed to the bottom wall of the fixed barrel, and the other end is fixed to the housing. Turbine blades are also installed on the outer wall of the main shaft. These support bearings ensure smooth relative movement between the drill change mechanism and the rotating body, reducing friction and vibration and extending the service life of the equipment. The fixed screw provides stable support and guidance for the push drill motor, ensuring the linearity of the push drill movement. Driven by high-pressure gas, the turbine blades drive the main shaft to rotate at high speed, providing the required high-speed power to the drill bit and ensuring the normal operation of the equipment.

[0022] Beneficial effects of the present invention:

[0023] 1. Efficient Treatment: The automated drill-changing architecture, coupled with subsequent refinement of various components, significantly reduces drill-changing time. Testing has shown that compared to traditional manual drill changes, each drill-changing time can be reduced by approximately 80%, and overall treatment time can be shortened by approximately 30%. This significantly improves treatment efficiency, allowing doctors to complete more treatment operations within a specific timeframe.

[0024] 2. Improve experience: Reduce patients' waiting time at the chair, reduce patients' discomfort and psychological burden caused by long-term treatment, significantly improve patients' treatment experience, and help improve patients' satisfaction and compliance with oral treatment.

[0025] 3. Reduced Risk: This reduces the need for doctors to manually change drills, reducing the risk of errors due to hand fatigue, protecting the patient's dental tissue, and improving treatment safety. Furthermore, designs such as stress-sensing plates and anti-slip devices further ensure the stability and safety of the treatment process.

[0026] 4. Intelligent and convenient: The voice module enables the drill to be changed by voice command, making the operation more convenient and intelligent, in line with the development trend of modern oral medical equipment, and enhancing the technological sense and competitiveness of the equipment.

[0027] 5. Equipment optimization: The coordinated design of various components enhances equipment performance. For example, the chuck device stably clamps the drill bit, the drill changing mechanism accurately changes the drill, and the support bearings and turbine blades ensure the stability and power of equipment operation, thereby extending the service life of the equipment and reducing equipment maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A connection diagram for illustrating an exemplary embodiment of a dental high-speed turbine handpiece according to the present invention;

[0029] Figure 2 A cross-sectional view illustrating a schematic embodiment of a dental high-speed turbine handpiece according to the present invention;

[0030] Figure 3 A schematic structural diagram for illustrating an exemplary embodiment of a handpiece of a dental high-speed turbine handpiece according to the present invention;

[0031] Figure 4 A cross-sectional view illustrating a schematic embodiment of a handpiece of a dental high-speed turbine handpiece according to the present invention;

[0032] Figure 5 A cross-sectional view illustrating another exemplary embodiment of a handpiece of a dental high-speed turbine handpiece according to the present invention;

[0033] Figure 6 A schematic structural diagram for illustrating a schematic embodiment of a cutaway state of a dental high-speed turbine handpiece according to the present invention;

[0034] Figure 7 A schematic structural diagram for illustrating another exemplary embodiment of a cutaway state of a dental high-speed turbine handpiece according to the present invention;

[0035] Figure 8 A schematic structural diagram for illustrating another exemplary embodiment of a cutaway state of a dental high-speed turbine handpiece according to the present invention;

[0036] Figure 9A schematic structural diagram for illustrating another exemplary embodiment of a cutaway state of a dental high-speed turbine handpiece according to the present invention;

[0037] Figure 10 A schematic structural diagram for illustrating another exemplary embodiment of a cutaway state of a dental high-speed turbine handpiece according to the present invention;

[0038] Figure 11 A schematic structural diagram for illustrating another exemplary embodiment of a cutaway state of a dental high-speed turbine handpiece according to the present invention;

[0039] Figure 12 To illustrate Figure 11 A partial enlarged schematic diagram of point A in the middle.

[0040] List of parts and reference numerals:

[0041] 1. Body; 11. High-pressure air pipe; 2. Handpiece; 3. Drill bit; 31. Raised ring; 4. Housing; 41. Bearing assembly; 5. Rotating body; 51. Spindle cylinder; 511. Spindle-shaped cylindrical space; 512. Upper cylinder; 513. Lower cylinder; 514. Turbine blade; 52. Chuck assembly; 521. Inner cavity; 522. Clamping flap; 5221. Arc groove; 5222. Stress-sensing plate; 523. Guide port; 524. Reset Spring; 53, driving device; 531, pressing cylinder; 5311, arc-shaped extrusion surface; 532, electric telescopic rod; 54, anti-slip device; 541, sliding seat; 542, anti-slip pressure block; 543, compression spring; 6, drill changing mechanism; 61, fixed cylinder; 611, drop drill hole; 62, drill changing cylinder; 621, accommodating chamber; 63, first motor; 64, fixed screw; 65, push drill motor; 66, screw block; 67, pressing rod; 68, support bearing. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0043] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0044] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention not only refer to changes in position, but also include movements such as rotation and rolling in which there is no relative change in position but the state changes.

[0045] Finally, it should be noted that when a component is referred to as being "located on" or "disposed on" another component, it can be on the other component or there may be an intervening component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0046] In existing technologies, high-speed dental turbine handpieces, a core tool for oral treatment, often require doctors to manually change drill bits (3) of varying specifications to accommodate complex treatment needs. This process leads to frequent treatment interruptions, prolonged patient chairside time, increased doctor hand fatigue, and the risk of operational errors. Frequent drill bit changes can affect positioning accuracy, and thus treatment effectiveness, especially during high-precision treatments.

[0047] To address this issue, researchers discovered that the core conflict in the manual drill changing process lies in balancing operational efficiency and treatment accuracy. Analyzing existing equipment revealed that traditional clamping devices lack automated adjustment capabilities, requiring manual alignment of the center axis with each drill change. Consequently, the team focused on developing an automated drill changing system that utilizes mechanical transmission and intelligent control to rapidly position, clamp, and align the drill axis, eliminating manual intervention.

[0048] Therefore, if Figures 1 to 12 A dental high-speed turbine handpiece is shown. This application proposes a dental high-speed turbine handpiece comprising a body 1, a handpiece 2, and a variety of drill bits 3. The body 1 is provided with a high-pressure air pipe 11. The handpiece 2 comprises a housing 4, a rotating body 5, a drill changing mechanism 6, and a control system. The rotating body 5 is mounted within the housing 4 via a bearing assembly 41 and comprises a spindle 51, a chuck 52, a drive 53, and an anti-slip device 54. The anti-slip device 54 is used to prevent the drill bit 3 from detaching. The drill changing mechanism 6 comprises a fixed barrel 61, a drill changing barrel 62, a first motor 63, a fixed lead screw 64, and a drill pushing motor 65. The control system integrates a voice module. Upon receiving a drill changing command, the first motor 63 drives the drill changing barrel 62 to rotate and position the target drill bit 3. The drill pushing motor 65 pushes the target drill bit 3 downward to eject the old drill bit 3. The drive 53 causes the chuck 52 to circumferentially clamp the target drill bit 3 and align its centerline with the rotation axis of the spindle 51, thereby driving the drill bit 3 to rotate using high-pressure air.

[0049] The rotating body 5 is installed inside the housing 4 through a bearing assembly 41, which can be specifically implemented by using a ball bearing or a sliding bearing to achieve stable rotation support and avoid deflection during high-speed operation. Figure 4In the embodiment, bearing assemblies 41 can be positioned above and below turbine blades 514 to ensure stability during operation of the rotating body 5. An anti-slip device 54, such as a spring-driven anti-slip pressure block 542, is positioned within the chuck assembly 52. The friction between the anti-slip pressure block 542 and the drill bit 3 overcomes the weight of the drill bit 3, preventing it from falling out under its own weight. The drill change barrel 62 in the drill change mechanism 6 is driven to rotate by a first motor 63, such as a stepper motor or servo motor. Precise angle control is achieved through a gear or belt drive, allowing the target drill bit 3 to be quickly positioned at the drill change position. The push drill motor 65 drives the pressure rod 67 downward via a fixed screw 64, such as a linear motor or rotary motor in conjunction with a ball screw structure, ensuring linear motion accuracy during the push drill process. Circumferential clamping of the chuck assembly 52 is achieved via a drive assembly 53, such as an electric telescopic rod 532 in conjunction with an arcuate extrusion surface 5311, which uniformly applies pressure to contract the clamping petals 522, creating a uniform clamping force on the outer wall of the drill bit 3.

[0050] Specifically, when the voice module receives the drill change command, the control system initiates the drill change process. The drive unit 53 is activated, and the electric telescopic rod 532 drives the pressure cylinder 531 upward to release the pressure on the clamping flap 522. The clamping flap 522 moves vertically upward under the action of the return spring 524, forming a gap between the clamping flap 522 and the drill bit 3 in use, thereby releasing the fixation of the used drill bit 3. Then, the first motor 63 drives the drill change cylinder 62 to rotate until the target drill bit 3 is aligned above the chuck device 52. The push drill motor 65 drives the pressure rod 67 downward via the screw block 66 to press the target drill bit 3 downward along the drill hole 611 at the bottom of the fixed cylinder 61. When the target drill bit 3 enters the chuck device 52, the drive unit 53 is activated, and the electric telescopic rod 532 pushes the pressure cylinder 531 to squeeze the clamping flap 522, reducing the diameter of the inner cavity 521 to clamp the outer wall of the drill bit 3. At the same time, the target drill bit 3 moves downward, pushing the old drill bit 3 out of the chuck device 52. The anti-drop device 54 releases the old drill bit 3 after the clamping state is released. After the chuck device 52 completes the clamping, the center line of the drill bit 3 automatically coincides with the rotation axis of the spindle barrel 51. The high-pressure gas drives the spindle barrel 51, driving the drill bit 3 to rotate at high speed.

[0051] Compared to existing technologies, which rely on manual operation for drill bit replacement and axis alignment, this solution achieves automatic drill bit replacement and axis self-alignment through the coordinated control of the drill bit replacement mechanism 6 and the clamping device. In the existing technology, the chuck device 52 lacks a slip-off prevention design, requiring manual fixation of the drill bit 3. This solution, through the synergistic action of the slip-off prevention device 54 and the clamping device, ensures the stable positioning of the drill bit 3 during the drill bit replacement process, avoiding the risk of it falling off. Furthermore, existing technologies are unable to achieve simultaneous completion of drill bit 3 replacement and axis alignment. This solution, through the circumferential clamping of the clamping petals 522 and the rotational drive of the spindle barrel 51, automatically completes axis alignment during the clamping process.

[0052] Through the above-described technical solution, this application achieves full automation of the drill bit 3 replacement process, significantly shortening treatment interruptions and reducing the manual burden on the physician. The coordination of the chuck device 52 and the anti-dropout device 54 prevents the drill bit 3 from accidentally falling off, ensuring the safety of the treatment process. The coordinated control of the drill change mechanism 6 and the drive device 53 ensures the positioning and clamping accuracy of the drill bit 3, eliminates manual calibration errors, and improves treatment efficiency and operational consistency.

[0053] The present application further proposes that a spindle-shaped cylindrical space 511 for accommodating a chuck device 52 is provided in the main shaft cylinder 51, and the main shaft cylinder 51 includes an upper cylinder 512 and a lower cylinder 513 fixedly mounted to the bottom of the upper cylinder 512. The outer wall of the chuck device 52 is spindle-shaped and cylindrical and can slide in the vertical direction relative to the spindle-shaped cylindrical space 511 to change the size of the inner cavity 521 of the chuck device 52. The driving device 53 includes a pressing cylinder 531 located above the chuck device 52 and an electric telescopic rod 532 fixed to the main shaft cylinder 51. The inner side of the pressing cylinder 531 is formed with an arc-shaped extrusion surface 5311 that cooperates with the chuck device 52. The electric telescopic rod 532 presses the chuck device 52 downward through the pressing cylinder 531 to reduce the diameter of the inner cavity 521 of the chuck device 52.

[0054] Among them, the spindle-shaped cylindrical space 511 refers to a cylindrical cavity with a spindle-shaped profile formed inside the main shaft cylinder 51, which can be specifically implemented by a split structural design, and is used to accommodate the chuck device 52 and provide a sliding guide. The outer wall of the chuck device 52 is spindle-shaped and cylindrical, which means that its outer contour matches the spindle-shaped cylindrical space 511, so that it can slide in the vertical direction to adjust the size of the inner cavity 521. The pressing cylinder 531 refers to an annular structure located above the chuck device 52, which can be specifically made of aluminum alloy. The inner arc-shaped extrusion surface 5311 is used to contact the outer wall of the chuck device 52 and transmit pressure. The electric telescopic rod 532 refers to a driving component that can output linear motion, which can be specifically implemented by a micro stepping motor in combination with a ball screw, and is used to control the lifting and lowering action of the pressing cylinder 531.

[0055] Specifically, the chuck assembly 52 is in a relaxed position when not in operation, maintaining a sliding gap between its outer wall and the spindle-shaped cylindrical space 511. When the drill bit 3 needs to be clamped, the electric telescopic rod 532 is activated and pushes the pressure cylinder 531 downward in the vertical direction. The curved extrusion surface 5311 of the pressure cylinder 531 contacts the outer wall of the chuck assembly 52, generating radial and axial forces that force the chuck assembly 52 to slide downward as a whole. As the lower diameter of the spindle-shaped cylindrical space 511 gradually decreases, the outer wall of the chuck assembly 52 is constrained by the side walls of the space during its downward movement, causing the diameter of its inner cavity 521 to simultaneously decrease, thereby forming a circumferential clamp for the drill bit 3. During this process, the continuous contact between the curved extrusion surface 5311 of the pressure cylinder 531 and the outer wall of the chuck assembly 52 ensures uniform pressure distribution, while the precise stroke control of the electric telescopic rod 532 adjusts the clamping force. When the drill bit 3 needs to be released, the electric telescopic rod 532 drives the pressing cylinder 531 to retract, and the chuck device 52 returns to its initial position under the action of its own elasticity or the reset mechanism.

[0056] Compared to existing technologies, conventional chuck devices 52 often utilize fixed jaws coupled with a manual tightening mechanism. This prevents continuous adjustment of the diameter of the inner cavity 521 and relies on operator experience to control the clamping force. This solution, through the synergistic effect of the spindle-shaped cylindrical space 511 and the electric drive device 53, enables the chuck device 52 to automatically adjust the size of the inner cavity 521 during vertical sliding. This eliminates the need for manual adjustment and, through the adaptability of the mechanical structure, ensures a precise match between the clamping force and the size of the drill bit 3.

[0057] Through this technical solution, the diameter of the inner cavity 521 of the chuck assembly 52 can be automatically adjusted according to the specifications of the drill bit 3, avoiding loose clamping or excessive squeezing caused by different drill bit 3 sizes. The combination of the pressure cylinder 531 and the electric telescopic rod 532 enables rapid clamping action and shortens the state switching time of the clamping mechanism during drill bit 3 replacement. Furthermore, the sliding guidance effect of the spindle-shaped cylindrical space 511 on the chuck assembly 52 ensures that the central axis of the drill bit 3 always coincides with the rotational axis of the spindle barrel 51, effectively reducing radial runout during high-speed rotation.

[0058] The present application further proposes that the chuck device 52 includes a plurality of clamping petals 522 evenly distributed along the circumferential direction of the spindle-shaped cylindrical space 511. When the chuck device 52 is in a clamping state, each clamping petal 522 abuts against the drill bit 3 and forms a cylindrical clamping inner cavity 521; when the chuck device 52 is in a relaxed state, there is a sliding space between adjacent clamping petals 522.

[0059] The clamping petals 522 refer to a plurality of movable petal-like structures uniformly arranged along the circumference, and can be made of metal materials. The uniform distribution along the circumference achieves uniform contact with the outer wall of the drill bit 3. The cylindrical clamping cavity 521 refers to a cylindrical space enclosed by the inner walls of the plurality of clamping petals 522. Specifically, it can be formed by the synchronous inward movement of the clamping petals 522 to ensure that the centerline of the drill bit 3 coincides with the rotation axis of the spindle barrel 51. The slip space refers to the gap formed between adjacent clamping petals 522 in the relaxed state. Specifically, it can be created by the outward movement of the clamping petals 522 to provide the displacement margin required for the drill bit 3 to disengage.

[0060] Specifically, when the drill bit 3 needs to be clamped, the driving device 53 squeezes the clamping petals 522 downward through the pressure cylinder 531, forcing each clamping petal 522 to shrink inward synchronously until the inner wall completely contacts the outer surface of the drill bit 3 to form a cylindrical clamping cavity 521. At this time, the contact force between the clamping petals 522 is evenly distributed around the drill bit 3, avoiding single-point stress concentration that causes the drill bit 3 to deflect. When the drill bit 3 needs to be replaced, the driving device 53 releases the squeezing of the clamping petals 522, and the reset spring 524 pushes the clamping petals 522 to reset upward. The sliding space formed between adjacent clamping petals 522 allows the new drill bit 3 to move vertically downward through the push drill mechanism, pushing the original drill bit 3 out of the chuck device 52. During this process, the existence of the sliding space enables the clamping petals 522 to expand outward to avoid interference with the moving drill bit 3.

[0061] Compared to existing technologies, conventional chuck devices 52 often utilize a monolithic clamping structure, which lacks independent adjustment at multiple circumferential points and can easily lead to uneven clamping force distribution due to dimensional errors in the drill bit 3. This solution, however, utilizes a split clamping petal 522 structure that automatically adapts to drill bits 3 of varying diameters during the clamping process. Furthermore, the sliding space design eliminates mechanical obstruction during drill bit changes, making drill bit 3 replacement smoother.

[0062] Through the above-mentioned technical solution, the present application can solve the problem of positioning deviation caused by uneven clamping force when manually changing the drill bit 3. By ensuring the coincidence of the rotation axis of the drill bit 3 with the axis of the spindle barrel 51 through multi-point uniform clamping, vibration and processing errors caused by eccentric rotation of the drill bit 3 are avoided. At the same time, the sliding space allows the contact state between the clamping petal 522 and the drill bit 3 to be quickly switched during the drill bit replacement process, significantly shortening the time required to replace the drill bit 3.

[0063] The present application further proposes that a guide opening 523 is provided at the top center position of the chuck device 52, the guide opening 523 is connected to the cylindrical clamping inner cavity 521, and the inner diameter of the guide opening 523 gradually increases in the vertical upward direction, and a drop drill hole 611 is provided at the bottom center position of the fixed cylinder 61, and the drop drill hole 611, the guide opening 523, the cylindrical clamping inner cavity 521 and the spindle-shaped cylindrical space 511 are all located on the same central axis.

[0064] Among them, the guide port 523 refers to a conical guide structure arranged at the top of the chuck device 52, and its inner diameter expands as the height increases. This structure is used to guide the external drill bit 3 to enter the clamping area accurately along the axial direction. Among them, the drill hole 611 refers to the through hole at the bottom of the fixed cylinder 61, which can be processed and formed by a high-precision CNC machine tool, and the aperture size is slightly larger than the diameter of the drill bit 3. This structure ensures that the drill bit 3 forms a coaxial alignment with the guide port 523 when it falls vertically under the action of gravity. Among them, the same central axis refers to the coincidence of the geometric center lines of each structural component, which can be achieved by adjusting the assembly position through a laser calibration device. This layout ensures that the drill bit 3 is always in a precise axial motion trajectory during the replacement process.

[0065] Specifically, after the drill changer 62 rotates to select the target drill bit 3, the drill motor 65 drives the pressure rod 67 to press down the target drill bit 3. The target drill bit 3 first passes through the drill hole 611 at the bottom of the fixed tube 61 and then enters the guide opening 523 at the top of the chuck device 52. As the inner diameter of the guide opening 523 gradually expands upward, the drill bit 3 automatically adjusts to the center position when it contacts the inner wall of the guide opening 523. As it continues to move downward, the drill bit 3 passes through the guide opening 523 and enters the cylindrical clamping cavity 521. At this time, the center line of the drill bit 3 has completely coincided with the rotation axis of the main shaft tube 51. During the closing process of the clamping petal 522, the drill bit 3 can be precisely positioned without additional adjustment.

[0066] Compared to existing technologies, traditional equipment can easily cause centering deviations due to gravity when the drill bit 3 falls, requiring manual adjustment or repeated calibration. This solution uses coaxially distributed drill holes 611 and guide openings 523 to form a dual positioning channel, allowing the drill bit 3 to be automatically centered during the free-fall phase, eliminating manual intervention.

[0067] Through the above-mentioned technical solution, the present application implements autonomous axial calibration during drill bit 3 replacement, avoiding clamping failure caused by drill bit 3 positioning deviation. In clinical practice, the drill bit 3 can be directly put into operation after replacement without pausing to check alignment, effectively shortening the time required for a single drill change. Furthermore, this structure reduces friction loss between the drill bit 3 and the clamping device, extending the service life of the device.

[0068] The present application further proposes to install a reset spring 524 between the clamping flap 522 and the main shaft cylinder 51. The reset spring 524 has a force to drive the clamping flap 522 vertically upward. When the pressure cylinder 531 is separated from the clamping flap 522, the clamping flap 522 is in a relaxed state, and the outer diameter of the clamping flap 522 is the largest.

[0069] The return spring 524 is an elastic element connecting the clamping flap 522 and the spindle cylinder 51, and can be implemented as a coil spring or a disc spring. Its function is to provide a vertical upward thrust when the pressure cylinder 531 is separated from the clamping flap 522, so that the clamping flap 522 quickly returns to its initial position. The maximum outer diameter of the clamping flap 522 when in a relaxed state refers to the state in which the clamping flap 522 is naturally expanded when not squeezed by external forces. This can be achieved through the elastic deformation of the spring, so that the clamping flap 522 forms a larger outer diameter when relaxed, which facilitates the drill bit 3 to separate from or enter the clamping space.

[0070] Specifically, when the drill bit 3 needs to be replaced, the electric telescopic rod 532 drives the pressure cylinder 531 upward. At this time, the elastic force of the return spring 524 pushes the clamping petals 522 to slide upward in the vertical direction, increasing the sliding space between adjacent clamping petals 522 and expanding the outer diameter of the clamping petals 522 to its maximum state. At this time, the diameter of the cylindrical clamping cavity 521 of the chuck device 52 expands, and the drill bit 3 to be replaced automatically disengages the clamping area under the action of gravity. After the drill changing mechanism 6 pushes the designated drill bit 3 into the chuck device 52, the electric telescopic rod 532 drives the pressure cylinder 531 downward to press the clamping petals 522, compressing the return spring 524, reducing the outer diameter of the clamping petals 522 and forming a circumferential clamp for the drill bit 3.

[0071] Compared with the existing technology, the traditional drill bit 3 clamping device usually relies on manual adjustment or complex driving structure to release the clamping force. The present solution uses the elastic reset characteristics of the reset spring 524 to automatically release the clamping state when the pressure cylinder 531 is disengaged, without the need for additional operating steps. At the same time, the clamping petal 522 with an expanded outer diameter can form a larger drill bit 3 disengagement channel to avoid jamming or friction damage.

[0072] Through the above technical solution, the present application can achieve rapid switching of the clamping state, reduce the manual intervention time during the replacement of the drill bit 3, reduce the doctor's operating fatigue, and at the same time avoid the problem of drill bit 3 residue or positioning offset caused by incomplete release of the clamping force, thereby improving treatment efficiency and reducing operational risks.

[0073] The present application further proposes that the outer side of the drill bit 3 is provided with a raised ring 31 , and the inner wall of each clamping petal 522 is provided with an arc-shaped groove 5221 that cooperates with the raised ring 31 .

[0074] The raised ring 31 is an annular raised structure provided on the outer surface of the drill bit 3, which can be manufactured by machining or injection molding, and is used to form a physical stop with the arcuate groove 5221 of the clamping flap 522. The arcuate groove 5221 is a concave profile provided on the inner wall of the clamping flap 522, which can be manufactured by CNC milling or precision casting. Its curvature matches the cross-sectional shape of the raised ring 31, and is used to accommodate and secure the raised ring 31 in the clamped state.

[0075] Specifically, when the clamping petal 522 is retracted inward by the driving device 53, the arcuate groove 5221 forms an engagement relationship with the raised ring 31 on the surface of the drill bit 3, making the drill bit 3 unable to move axially. After the clamping petal 522 is closed, the raised ring 31 is completely wrapped in the arcuate groove 5221, forming a mechanical interlocking structure. This structure not only limits the axial displacement of the drill bit 3, but also disperses the shear stress during rotation through the contact surface between the raised ring 31 and the arcuate groove 5221, avoiding local stress concentration leading to clamping failure. During the drill change process, when the new drill bit 3 is pushed into the chuck device 52, its raised ring 31 automatically embeds into the arcuate groove 5221 of the clamping petal 522, realizing rapid positioning and self-alignment functions.

[0076] Compared to existing technologies, traditional clamping methods rely on frictional clamping force, which can easily cause axial movement or radial offset of the drill bit 3 during high-speed rotation. The mating structure of the raised ring 31 and the arcuate groove 5221 directly limits the displacement freedom of the drill bit 3 through geometric constraints, eliminating the need to rely solely on the pressure of the clamping petals 522 on the surface of the drill bit 3, significantly improving clamping stability.

[0077] Through the above technical solution, the present application solves the problem of loosening or deflection of the drill bit 3 due to insufficient clamping force when manually replacing the drill bit 3, ensures the coaxiality of drill bits 3 of different specifications during high-speed rotation, and reduces the risk of decreased treatment accuracy caused by deviation of the drill bit 3.

[0078] The present application further proposes that the inner wall of the clamping flap 522 also has a stress sensing sheet 5222 , and the stress sensing sheet 5222 is connected to the control system data.

[0079] The stress-sensing plate 5222 is a sensor component installed on the inner surface of the clamping flap 522 for real-time monitoring of the clamping force. Specifically, it can be implemented using a thin-film pressure sensor or a piezoresistive strain gauge. It is used to detect the stress distribution in the contact area between the clamping flap 522 and the drill bit 3. The data connection refers to the signal transmission link between the stress-sensing plate 5222 and the control system. Specifically, it can be implemented using a flexible circuit or a micro wireless transmission module, enabling real-time collection of clamping force data and feedback to the control system. The circuitry within the rotating body 5 can be electrically connected to the circuitry within the body 1 via a conductive slip ring.

[0080] Specifically, when the clamping flap 522 applies a clamping force to the drill bit 3, the stress sensing sheet 5222 continuously monitors stress changes in the contact area between the inner wall of the clamping flap 522 and the drill bit 3. If a local stress anomaly is detected, such as insufficient clamping force causing the drill bit 3 to deviate or excessive clamping force causing damage to the surface of the drill bit 3, the control system automatically adjusts the extension and contraction of the electric telescopic rod 532 based on the received stress data, thereby changing the degree of compression of the clamping flap 522 by the pressure cylinder 531. As a result, the diameter of the inner cavity 521 of the chuck device 52 is dynamically adjusted so that the clamping force is always within the set range. For example, during the clamping process, if the control system detects that the stress value of a certain clamping flap 522 is lower than a preset threshold, the thrust of the electric telescopic rod 532 in the corresponding area is increased to ensure uniform clamping.

[0081] Compared to existing technologies, conventional chuck devices 52 rely solely on mechanical structure or operator experience to determine clamping force, failing to monitor the clamping status in real time. This can easily cause the drill bit 3 to shift or slip due to uneven clamping force. This solution, however, utilizes stress-sensing plates 5222 in conjunction with a control system to achieve closed-loop control of the clamping force. This prevents rotational instability of the drill bit 3 due to insufficient clamping force, while also preventing mechanical damage to the drill bit 3 or chuck device 52 caused by excessive clamping force.

[0082] Through the above technical solution, the present application can monitor and automatically adjust the clamping state of the drill bit 3 in real time, effectively reducing the risk of drill bit 3 deviation or slippage caused by abnormal clamping force, while reducing dependence on the doctor's experience during operation, thereby improving the safety and operational reliability of dental treatment.

[0083] The present application further proposes that there are multiple anti-slip devices 54 evenly distributed along the circumferential direction of the chuck device 52, and the anti-slip devices 54 include a slide 541 fixed to the chuck device 52, an anti-slip pressure block 542 located in the slide 541, and a compression spring 543 connecting the anti-slip pressure block 542 and the side wall of the slide 541. The compression spring 543 has an elastic extrusion force that drives the anti-slip pressure block 542 to move along the slide 541 toward the center position of the chuck device 52.

[0084] Among them, the slide 541 refers to the basic structure for carrying the anti-slip pressure block 542, which can be specifically formed by a metal block and welded to the bottom of the chuck device 52. The inner side of the slide 541 forms a space for accommodating the anti-slip pressure block 542, thereby providing a moving track for the anti-slip pressure block 542. The anti-slip pressure block 542 refers to the clamping component that contacts the surface of the drill bit 3, and can specifically be a metal block with an arc-shaped contact surface, which maintains continuous pressure on the drill bit 3 through the elastic force of the compression spring 543. The compression spring 543 refers to an elastic element that provides elastic extrusion force, and can specifically be a cylindrical coil spring, one end of which is fixed to the side wall of the slide 541 and the other end is connected to the anti-slip pressure block 542, which generates radial pressure through its own deformation to prevent the drill bit 3 from falling off in the non-clamped state.

[0085] Specifically, when the chuck device 52 is in a relaxed state, the anti-slip pressure block 542 moves toward the center position along the slide 541 under the elastic squeezing force of the compression spring 543, so that the arc-shaped contact surface of the anti-slip pressure block 542 forms point contact or line contact with the surface of the drill bit 3. It should be noted that the anti-slip pressure block 542 always has a clamping force on the drill bit 3. When the clamping petal 522 releases the squeezing and fixing of the drill bit 3, the anti-slip pressure block 542 still elastically squeezes the drill bit 3, and the frictional resistance between the anti-slip pressure block 542 and the drill bit 3 is greater than the weight of the drill bit 3 itself. When the new drill bit 3 squeezes the old drill bit 3, the weight of the old drill bit 3 plus the squeezing force of the new drill bit 3 is greater than the frictional resistance between the anti-slip slider and the drill bit 3. Therefore, the new drill bit 3 can squeeze the old drill bit 3 from the inside of the clamping petal 522 to the outside. After the chuck device 52 enters the clamping state, the anti-slip pressure block 542 cooperates with the clamping flap 522 to form a uniform restraining force through the multiple anti-slip devices 54 distributed circumferentially, ensuring that the drill bit 3 remains stable during high-speed rotation.

[0086] Compared with the prior art, this solution evenly arranges multiple independent anti-slip devices 54 along the circumference and utilizes the continuous elastic force of the compression spring 543 to form a redundant anti-slip structure, which can maintain effective constraint on the drill bit 3 even if the chuck device 52 is in a relaxed state.

[0087] Through the above technical solution, the present application can prevent accidental falling off due to gravity during the replacement process of the drill bit 3, reducing the operational risk when replacing the drill bit 3. At the same time, the circumferentially evenly distributed anti-falling device 54 avoids wear on the surface of the drill bit 3 caused by local stress concentration, thereby improving the clamping stability and the service life of the equipment.

[0088] The present application further proposes that the drill changing mechanism 6 is fixed to the housing 4, and the drill changing mechanism 6 includes a fixed cylinder 61, a drill changing cylinder 62 located in the fixed cylinder 61, a first motor 63 that drives the drill changing cylinder 62 to rotate, a fixed screw 64 and a drill pushing motor 65; a housing chamber 621 for holding the drill bit 3 is provided in the drill changing cylinder 62, and a rubber anti-slip pad is attached to the inner wall of the housing chamber 621, and the first motor 63 can drive the drill changing cylinder 62 to rotate around its own axis; the drill pushing motor 65 is installed to the fixed screw 64 through a screw block 66, and a pressure rod 67 is provided on one side of the screw block 66, and the pressure rod 67 is located below the screw block 66, and the central axis of the pressure rod 67 coincides with the central axis of the chuck device 52, and the drill pushing motor 65 can drive the pressure rod 67 to move in the vertical direction.

[0089] Among them, the drill change barrel 62 refers to a cylindrical component used to store spare drill bits 3 and perform rotational positioning, and can be specifically implemented by a hollow cylinder made of stainless steel. The accommodating cavity 621 refers to a plurality of independent storage spaces evenly distributed along the circumference of the drill change barrel 62, and each cavity corresponds to storing one type of drill bit 3. The rubber anti-slip pad refers to an elastic material layer covering the inner wall of the accommodating cavity 621, and can be specifically implemented by silicone material. Its surface can be provided with anti-slip patterns to increase the friction coefficient. The first motor 63 refers to a stepper motor that drives the drill change barrel 62 to rotate, and can be specifically implemented by a closed-loop control servo motor, which can accurately control the rotation angle of the drill change barrel 62. The screw block 66 refers to a moving component that is threadedly matched with the fixed screw 64, and can be specifically made of aluminum alloy. A self-lubricating copper sleeve is provided inside to achieve smooth sliding. The pressure rod 67 refers to a rigid push rod used to push the drill bit 3 downward, and can be specifically made of cemented carbide material. The end is provided with a groove that matches the shape of the top of the drill bit 3.

[0090] Specifically, when the voice module receives the drill change instruction, the first motor 63 drives the drill change cylinder 62 to rotate around its own axis, so that the accommodating cavity 621 of the target drill bit 3 is precisely aligned with the top of the chuck device 52. The push drill motor 65 drives the pressure rod 67 to move vertically downward along the fixed screw 64 through the screw block 66. The bottom end of the pressure rod 67 contacts the target drill bit 3 and applies a vertical downward thrust, so that the target drill bit 3 passes through the drill hole 611 at the bottom of the fixed cylinder 61 and enters the chuck device 52. The setting that the central axis of the pressure rod 67 coincides with the central axis of the chuck device 52 ensures that the thrust is always transmitted along the axis direction of the drill bit 3, preventing the lateral force component from causing the drill bit 3 to get stuck. It should be noted that the attached drawings of this application are only used to show the basic structure of this application. The proportional issues of the length of the drill bit 3 in the figure are not protected. They will be accurately designed according to actual use requirements in the future. This does not constitute a defect in the attached drawings.

[0091] In some embodiments, the number of accommodating cavities 621 can be set to four or six to accommodate common drill bit types 3. The thickness of the rubber anti-slip pad can be controlled within the range of 1.2-1.5 mm to balance anti-slip performance and space utilization. The thread lead of the screw block 66 and the fixed screw 64 can be set to 2 mm to achieve a movement accuracy of 0.01 mm. The depth of the groove at the end of the pressure rod 67 can be designed to be 3 mm to accommodate the top protrusion of a standard drill bit 3.

[0092] Through the above-mentioned technical solution, the present application achieves automated management of the drill bit 3 storage device, enabling the targeted drill bit 3 to be quickly and accurately rotated to the replacement station. The axial thrust design of the pressure rod 67 prevents the drill bit 3 from tilting and getting stuck during the pushing process. The coordination of the screw drive mechanism and the motor ensures repeatable precision during the drill bit 3 replacement process, significantly reducing the probability of manual error and shortening the time required for a single drill bit 3 replacement.

[0093] The present application further proposes that a support bearing 68 is provided on the outer wall of the fixed cylinder 61 and the inner wall of the main shaft cylinder 51, one end of the fixed screw 64 is fixed to the bottom wall of the fixed cylinder 61, and the other end is fixed to the shell 4, and the outer wall of the main shaft cylinder 51 is also provided with a turbine blade 514.

[0094] The support bearing 68 refers to a rotating support structure disposed between the fixed cylinder 61 and the spindle cylinder 51, and can be implemented as a ball bearing or a sliding bearing. It is used to reduce frictional resistance between the fixed cylinder 61 and the spindle cylinder 51, thereby ensuring coaxiality between the drill change mechanism 6 and the rotating body 5. The fixed screw 64, with one end fixed to the bottom wall of the fixed cylinder 61 and the other end fixed to the housing 4, achieves axial positioning of the fixed cylinder 61 through a rigid connection. This can be achieved through threaded fastening or welding, ensuring that the fixed cylinder 61 of the drill change mechanism 6 does not shift during the push-drilling process. The turbine blades 514 refer to a fluid dynamic structure distributed circumferentially along the outer wall of the spindle cylinder 51, and can be made of aluminum alloy or titanium alloy. They are used to convert the kinetic energy of the high-pressure gas into driving force for the rotating body 5.

[0095] Specifically, support bearing 68 is mounted between the outer wall of fixed cylinder 61 and the inner wall of spindle cylinder 51. Rolling or sliding contact reduces friction, allowing drill change cylinder 62 to remain coaxial with spindle cylinder 51 during rotation, thus preventing positioning deviation of drill bit 3 due to eccentricity. One end of fixed lead screw 64 is bolted to the bottom wall of fixed cylinder 61, while the other end is secured to the interior of housing 4 via a flange structure, providing stable axial support and preventing the drill change mechanism 6 from shaking due to the reaction force when push drill motor 65 drives pressure rod 67 downward. Turbine blades 514 are evenly distributed along the outer wall of spindle cylinder 51. When high-pressure gas enters from high-pressure gas pipe 11 within fuselage 1, the airflow impacts the surface of turbine blades 514, driving spindle cylinder 51 to rotate at high speed about its central axis, thereby driving the drill bit 3 within chuck device 52 to rotate synchronously.

[0096] Through the above technical solution, the present application can ensure the coaxial fit between the drill changing mechanism 6 and the rotating body 5, reduce the deviation or jamming of the drill bit 3 during the drilling process, and at the same time utilize the turbine blades 514 to enhance the rotational driving force of the main shaft cylinder 51, thereby improving the reliability of the drill bit 3 replacement and the overall efficiency of the treatment operation.

[0097] In an embodiment of comprehensive oral treatment,

[0098] 1. Treatment scenario: At a dental clinic, a doctor is performing a complex dental restoration on a patient. During the treatment, different types of drill bits 3 are used in sequence for tooth preparation, caries removal, and polishing.

[0099] 2. Equipment Preparation: Install the dental high-speed turbine handpiece of the present invention onto the dental unit, ensuring a secure connection and proper operation of the control system. Pre-place various drill bits (3) within the receiving cavity (621) of the drill changer (62), including a coarse-grained tooth preparation drill bit (3), a fine-grained caries removal drill bit (3), and a polishing drill bit (3) for polishing teeth.

[0100] 3. Treatment process:

[0101] 3.1 Tooth preparation stage: The doctor performs preliminary grinding on the patient's teeth using a coarse-grained tooth preparation drill bit 3. When it is necessary to replace the tooth preparation drill bit with a caries removal drill bit 3, the doctor sends a voice command to the control system to "replace the tooth preparation drill bit 3".

[0102] 3.2 Drill change process:

[0103] After the voice module of the control system receives the instruction, the electric telescopic rod 532 of the driving device 53 moves upward to release the squeezing of the chuck device 52 by the pressing cylinder 531, and the clamping flap 522 moves upward under the action of the reset spring 524 to release the squeezing and fixation of the dental preparation drill 3.

[0104] The first motor 63 is started, driving the drill changing cylinder 62 to rotate about its own axis. The accommodating chamber 621 in the drill changing cylinder 62 rotates in sequence. When the accommodating chamber 621 containing the caries removal drill bit 3 rotates to directly above the drill bit 3 to be replaced (tooth preparation drill bit 3), the first motor 63 stops rotating.

[0105] Next, the drill motor 65 is activated, driving the pressure rod 67 vertically downward along the fixed screw 64 via the screw block 66. The pressure rod 67 pushes the caries removal drill bit 3 out of the accommodating cavity 621 of the drill change barrel 62. The caries removal drill bit 3 passes through the drill hole 611 at the bottom of the fixed barrel 61 and enters the guide opening 523 at the top of the chuck assembly 52. Because the inner diameter of the guide opening 523 gradually decreases downward, the caries removal drill bit 3 is smoothly guided into the chuck assembly 52 and ejected to the outside.

[0106] At this time, the electric telescopic rod 532 of the drive device 53 moves downward, squeezing the chuck device 52 downward through the pressing cylinder 531. The multiple clamping petals 522 of the chuck device 52 slide downward along the spindle-shaped cylindrical space 511 under the action of the arcuate squeezing surface 5311 of the pressing cylinder 531, reducing the diameter of the inner cavity 521. The clamping petals 522 tightly abut the caries removal drill bit 3, achieving automated replacement of the drill bit 3.

[0107] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A dental high-speed turbine handpiece, comprising a body, a head and various types of drill bits, wherein a high-pressure air pipe is provided in the body, characterized in that: The nose comprises: a housing connected to the fuselage; a rotating body, the rotating body being mounted inside the housing via a bearing assembly, the rotating body comprising a main shaft, a chuck device located inside the main shaft, a driving device for driving the chuck device to clamp the drill bit, and an anti-slip device fixed to the bottom of the chuck device, the anti-slip device being capable of preventing the drill bit located in the chuck device from escaping from the chuck device due to its gravity; a drill changing mechanism fixed to the housing, the drill changing mechanism comprising a fixed cylinder, a drill changing cylinder located within the fixed cylinder, a first motor driving the drill changing cylinder to rotate, a fixed lead screw, and a drill pushing motor; A control system is provided with a voice module. When the voice module receives a drill-changing instruction, the first motor drives the drill-changing barrel to rotate so as to rotate the designated drill bit to the top of the drill bit to be replaced. The drill-pushing motor pushes the designated drill bit vertically downward to the inside of the chuck device to eject the drill bit to be replaced to the outside. The driving device drives the chuck device to form a circumferential clamp on the outer peripheral surface of the designated drill bit, and positions the center line of the drill bit at a position that coincides with the central rotation axis of the main shaft barrel, so as to drive the designated drill bit to rotate around the central rotation axis of the main shaft barrel under the drive of high-pressure gas.

2. A dental high-speed turbine handpiece according to claim 1, characterized in that: A spindle-shaped cylindrical space for accommodating a chuck device is provided in the main shaft cylinder, and the main shaft cylinder comprises an upper cylinder and a lower cylinder fixedly mounted to the bottom of the upper cylinder; The outer wall of the chuck device is in the shape of a spindle cylinder and can slide in the vertical direction relative to the spindle cylinder space to change the size of the inner cavity of the chuck device; The driving device includes a pressing cylinder located above the chuck device and an electric telescopic rod fixed to the main shaft cylinder. The inner side of the pressing cylinder is formed with an arc-shaped extrusion surface that cooperates with the chuck device. The electric telescopic rod presses the chuck device downward through the pressing cylinder to reduce the inner cavity diameter of the chuck device.

3. A dental high-speed turbine handpiece according to claim 2, characterized in that: The chuck device includes a plurality of clamping petals evenly distributed along the circumferential direction of the spindle-shaped cylindrical space. When the chuck device is in a clamping state, each of the clamping petals abuts against the drill bit and forms a cylindrical clamping inner cavity; when the chuck device is in a relaxed state, there is a sliding space between adjacent clamping petals.

4. A dental high-speed turbine handpiece according to claim 3, characterized in that: A guide port is provided at the top center position of the chuck device, the guide port is connected to the cylindrical clamping inner cavity, and the inner diameter of the guide port gradually increases in the vertical upward direction. A drop drill hole is provided at the bottom center position of the fixed cylinder, and the drop drill hole, the guide port, the cylindrical clamping inner cavity and the spindle-shaped cylindrical space are all located on the same central axis.

5. The dental high-speed turbine handpiece according to claim 3, characterized in that: A return spring is installed between each clamping flap and the main shaft cylinder. The return spring has a force to drive the clamping flap vertically upward. When the pressure cylinder is separated from the clamping flap, the clamping flap is in a relaxed state and the outer diameter of the clamping flap is the largest.

6. The dental high-speed turbine handpiece according to claim 3, characterized in that: The outer side of the drill bit is provided with a raised ring, and the inner wall of each clamping petal is provided with an arc groove matched with the raised ring.

7. The dental high-speed turbine handpiece according to claim 3, characterized in that: The inner wall of the clamping flap is further provided with a stress sensing sheet, and the stress sensing sheet is data-connected to the control system.

8. The dental high-speed turbine handpiece according to claim 1, characterized in that: There are multiple anti-slip devices evenly distributed along the circumferential direction of the chuck device, and the anti-slip devices include a slide fixed to the chuck device, an anti-slip pressure block located in the slide, and a compression spring connecting the anti-slip pressure block and the side wall of the slide, and the compression spring has an elastic extrusion force that drives the anti-slip pressure block to move along the slide toward the center position of the chuck device.

9. The dental high-speed turbine handpiece according to claim 1, characterized in that: The drill changing barrel is provided with a housing for holding a drill bit, and a rubber anti-slip pad is attached to the inner wall of the housing. The first motor can drive the drill changing barrel to rotate around its own axis. The push drill motor is installed to the fixed screw through a screw block. A pressure rod is provided on one side of the screw block. The pressure rod is located below the screw block, and the central axis of the pressure rod coincides with the central axis of the chuck device. The push drill motor can drive the pressure rod to move in the vertical direction.

10. The dental high-speed turbine handpiece according to claim 1, characterized in that: The outer wall of the fixed cylinder and the inner wall of the main shaft cylinder are provided with support bearings. One end of the fixed screw is fixed to the bottom wall of the fixed cylinder, and the other end is fixed to the shell. The outer wall of the main shaft cylinder is also provided with turbine blades.

Images