CN218075252U

CN218075252U - Novel dental handpiece wind wheel and drive shaft structure

Info

Publication number: CN218075252U
Application number: CN202220981609.1U
Authority: CN
Inventors: 曾文彬
Original assignee: Being Foshan Medical Equipment Co ltd
Current assignee: Being Foshan Medical Equipment Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-12-20
Anticipated expiration: 2032-04-24

Abstract

The utility model discloses a novel dental handpiece wind wheel and drive shaft structure, the dental handpiece wind wheel includes the wind wheel body, the peripheral wall annular interval at the wind wheel body is provided with a plurality of blade bodies, the both sides face of blade body divide into windward side and lee side, the windward side is the arcwall face structure toward the indent, the blade body is along the radial slope setting to the windward side of wind wheel body, the windward side of blade body is the arc structure toward the indent along the cross-section that the wind wheel body axial was cut, the cross-section that the windward side of blade body was cut along the wind wheel body radial is the arc structure toward the indent; in two adjacent blade bodies, the root of the windward side on the wind wheel body is in transition connection with the root of the leeward side on the other blade body through the arc of the flow guide surface which is in an arc shape and is inwards concave. The structure of the driving shaft adopts the structure, the wind wheel of the dental handpiece can improve the acting force of high-pressure airflow on the blades, and can realize higher-speed rotation, improve the rotating speed, reduce the noise and reduce the suck-back effect of the dental handpiece under the same size.

Description

Novel dental handpiece wind wheel and drive shaft structure

Technical Field

The utility model relates to a technical field of the high-speed cell-phone spare part of dentistry, in particular to novel dentistry cell-phone wind wheel and drive shaft structure.

Background

In daily clinical application of stomatology, a dental high-speed turbine handpiece is one of the most main treatment tools, is a high-speed rotary cutting medical instrument driven by airflow, has the rotating speed of 20-60 ten thousand revolutions per minute, and is mainly used for cutting tooth bodies, preparing tooth cavities, preparing tooth shapes, trimming tooth shapes and the like. Therefore, the dental handpiece is generally provided with the wind wheel, but when the air supply of the existing dental handpiece is stopped, the wind wheel still rotates due to the inertia of the wind wheel, and at the moment, the turbine cavity forms negative pressure to generate a suck-back phenomenon, so that water is sucked back into the dental handpiece to cause the damage of machinery; in addition, in the prior art, the wind wheel can be made larger in order to increase the rotating speed, but the dental handpiece head is very large, inconvenient to use and high in noise.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel dental handpiece wind wheel and drive shaft structure to solve one or more technical problem that exist among the prior art, provide a profitable selection or creation condition at least.

The technical scheme adopted for solving the technical problems is as follows:

at first the utility model provides a novel dental handpiece wind wheel, it includes: the wind wheel comprises a wind wheel body, wherein a plurality of blade bodies are annularly arranged on the outer peripheral wall of the wind wheel body at intervals, and each blade body is provided with a root end connected with the wind wheel body and a free end far away from the wind wheel body; in the circumferential direction of the wind wheel body, two side surfaces of the blade body are divided into a windward surface and a leeward surface, the windward surface is of an inward-concave arc-shaped surface structure, the blade body is obliquely arranged along the radial direction of the wind wheel body to the windward side, the section of the windward side of the blade body, which is cut along the axial direction of the wind wheel body, is of an inward-concave arc-shaped structure, and the section of the windward side of the blade body, which is cut along the radial direction of the wind wheel body, is of an inward-concave arc-shaped structure;

in two adjacent blade bodies, the root of the windward side on one wind wheel body is in transition connection with the root of the leeward side on the other blade body through the arc of the arc-shaped inward-concave flow guide surface.

The dental handpiece wind wheel has the beneficial effects that: the windward side of the blade body is of an inward-concave arc-shaped surface structure, the section cut along the axial direction of the wind wheel body on the windward side of the blade body and the section cut along the radial direction of the wind wheel body are of inward-concave arc-shaped structures, so that the acting force of high-pressure airflow on the blade can be improved, and under the same size, the blade can rotate at a higher speed, the force of the high-pressure airflow acting on the blade body is more concentrated, namely the windward side holds the high-pressure airflow, and meanwhile, the root of the windward side is in arc transition connection with the root of the leeward side on the other blade body through the arc-shaped inward-concave flow guide surface, so that the high-pressure airflow can flow along the windward side, the flow guide surface and the leeward side in sequence, the wind resistance of the high-pressure airflow is reduced, the rotating speed is further improved, and the noise is reduced; if the dental handpiece is stopped, the adsorption force of the wind wheel can be reduced when the wind wheel rotates under inertia, and because the leeward surface is inclined, the acting force of the leeward surface on the airflow is very small, so that the suck-back effect of the dental handpiece can be greatly reduced.

As a further improvement of the above technical means, the cross-sectional area of the blade body is gradually reduced from the root end toward the free end. Therefore, the structural strength of the blade body can be improved, and the material consumption is reduced.

As a further improvement of the technical scheme, inclined chamfers are arranged at two corners of the leeward side of the free end along the axial direction of the wind wheel body.

The scheme is provided with the inclined chamfer I, so that the material consumption can be reduced, the anti-collision function of the blade body corner is improved, and an obtuse angle structure rather than an acute angle structure with more uniform stress is formed; and secondly, a better backflow gap is formed between the leeward side and the inner peripheral wall of the power cavity, so that the cavities formed between the adjacent pairs of blade bodies are communicated, the air pressure is kept consistent as much as possible, and when the wind wheel rotates under the inertia effect, the airflow between the adjacent cavities can quickly circulate, and the formation of backpressure is reduced.

As a further improvement of the above technical solution, the free end is provided with an extension part extending outward along the axial direction at both end sides along the axial direction of the wind wheel body. The extension portion can enlarge the acting area of the blade body.

Meanwhile, a plurality of extending parts on each end side surround a circular guide groove, and the guide grooves are communicated with gaps between two adjacent blade bodies, so that airflow can be further divided, and the suck-back effect is reduced.

As a further improvement of the technical scheme, a through-type shaft hole is formed in the center of the wind wheel body, and annular convex rings are convexly arranged on the outer edges of two ends of the shaft hole.

The shaft hole is used for installing a driving shaft body, and the convex ring mainly limits the rotating bearing, so that a shunting gap is formed between the rotating bearing and the wind wheel body.

As a further improvement of the above technical solution, the height of the protruding ring is smaller than the height of the extending portion. Thus, the extension part can extend to the outer peripheral side of the rotating bearing, so that the structure is more compact and the miniaturization is realized.

Furthermore, the utility model provides a drive shaft structure, it includes foretell novel dental handpiece wind wheel, still including being hollow drive axis body, the drive axis body sets up with the wind wheel body is coaxial, the both ends of drive axis body set up in the both ends side of wind wheel body the both ends of drive axis body are all overlapped and are equipped with rolling bearing.

When the installation, the drive axis body passes through two rolling bearing and rotates to be installed in the aircraft nose, reduces frictional force, improves pivoted smoothness nature.

Drawings

The present invention will be further explained with reference to the drawings and examples;

fig. 1 is a schematic structural view of an embodiment of the novel dental handpiece wind wheel provided by the present invention;

fig. 2 is a schematic end view of an embodiment of the novel dental handpiece wind wheel provided by the present invention;

fig. 3 is a schematic structural diagram of an embodiment of a driving shaft structure provided by the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, and the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 3, the driving shaft structure for dental handpiece of the present invention makes the following embodiments:

this embodiment drive shaft structure includes the dental handpiece wind wheel, is hollow drive axis body 400, and the dental handpiece wind wheel of this embodiment includes wind wheel body 100, is provided with a plurality of blade bodies 200 at the annular interval of periphery wall of wind wheel body 100, blade body 200 is provided with the root end of being connected with wind wheel body 100 and keeps away from the free end of wind wheel body 100.

In the circumferential direction of the wind wheel body 100, two side surfaces of the blade body 200 are divided into a windward surface 210 and a leeward surface 220, the windward surface 210 is an inward-concave arc-shaped surface structure, the blade body 200 is arranged along the radial direction of the wind wheel body 100 to incline towards the windward side, the section of the windward side of the blade body 200, which is cut along the axial direction of the wind wheel body 100, is an inward-concave arc-shaped structure, the section of the windward side of the blade body 200, which is cut along the radial direction of the wind wheel body 100, is an inward-concave arc-shaped structure, and in two adjacent blade bodies 200, the root of the windward surface 210 on one wind wheel body 100 and the root of the leeward surface 220 on the other wind wheel body 200 are in arc-shaped transition connection through the arc-shaped inward-concave guide surface 230.

The wind wheel comprises a wind wheel body 100 and is characterized in that a through-type shaft hole 110 is formed in the center of the wind wheel body 100, a driving shaft body 400 and the wind wheel body 100 are coaxially arranged, the driving shaft body 400 is fixedly sleeved in the shaft hole 110, two ends of the driving shaft body 400 are arranged on two end sides of the wind wheel body 100, rotating bearings 410 are sleeved at two ends of the driving shaft body 400, and when the driving shaft body 400 is installed in a machine head through the rotation of the two rotating bearings 410, the friction force is reduced, and the rotating fluency is improved.

The windward side 210 is of an inward concave arc-shaped surface structure, the section of the windward side of the blade body 200, which is cut along the axial direction of the wind wheel body 100, and the section of the windward side of the blade body 200, which is cut along the radial direction of the wind wheel body 100, are both of inward concave arc-shaped structures, so that the acting force of high-pressure airflow on the blade can be improved, and under the same size, higher-speed rotation can be realized, the force of the high-pressure airflow acting on the blade body 200 is more concentrated, which is equivalent to the windward side 210 holding the high-pressure airflow, and meanwhile, the root of the windward side 210 and the root of the leeward side 220 on the other blade body 200 are in arc-shaped inward concave arc transition connection through the guide surface 230, so that the high-pressure airflow can flow along the windward side 210, the guide surface 230 and the leeward side 220 in sequence, the wind resistance of the high-pressure airflow is reduced, the rotating speed is further improved, and the noise is reduced; if the dental handpiece is stopped, the suction force of the wind wheel can be reduced when the wind wheel rotates under inertia, and the leeward side 220 is inclined, so that the acting force of the leeward side 220 on the airflow is small, and the suck-back effect of the dental handpiece can be greatly reduced.

In order to improve the structural strength of the blade body 200 and reduce the material consumption, the cross-sectional area of the blade body 200 is gradually reduced from the root end to the free end.

Furthermore, the two corners of the leeward side 220 of the free end along the axial direction of the wind wheel body 100 are both provided with the inclined chamfers 221, and the inclined chamfers 221 are arranged in the embodiment to reduce material consumption and improve the anti-collision function of the corners of the blade body 200, which is equivalent to forming an obtuse angle structure rather than an acute angle structure with more uniform stress; secondly, a better backflow gap is formed between the leeward side 220 and the inner peripheral wall of the power cavity, so that the cavities formed between the adjacent pairs of blade bodies 200 are communicated, the air pressure is kept consistent as much as possible, and when the wind wheel rotates under the action of inertia, airflow between the adjacent cavities can quickly circulate, and the formation of back pressure is reduced.

And, the free end is provided with extending portions 240 extending outward along the axial direction at both ends along the axial direction of the wind wheel body 100, the extending portions 240 can enlarge the area of the blade body 200, and a plurality of extending portions 240 at each end side surround a circular guide groove 300, the guide groove 300 is communicated with the gap between two adjacent blade bodies 200, so that the airflow can be further divided, and the suck-back effect is reduced, the annular convex rings 111 are convexly arranged at both ends of the shaft hole 110, and the convex rings 111 mainly limit the rotating bearing 410, so that a divided gap is formed between the rotating bearing 410 and the wind wheel body 100.

Further, the height of the protruding ring 111 is smaller than that of the extending portion 240, so that the extending portion 240 can extend to the outer circumferential side of the rotation bearing 410, thereby making the structure more compact and compact.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. A novel dental handpiece wind wheel is characterized in that: it includes:

the wind wheel comprises a wind wheel body (100), wherein a plurality of blade bodies (200) are arranged on the peripheral wall of the wind wheel body at intervals in an annular mode, and the blade bodies (200) are provided with root ends connected with the wind wheel body (100) and free ends far away from the wind wheel body (100);

in the circumferential direction of the wind wheel body (100), two side surfaces of the blade body (200) are divided into a windward surface (210) and a leeward surface (220), the windward surface (210) is of an inward concave arc surface structure, the blade body (200) is obliquely arranged along the radial direction of the wind wheel body (100) to the windward side, the section of the windward side of the blade body (200) cut along the axial direction of the wind wheel body (100) is of an inward concave arc structure, and the section of the windward side of the blade body (200) cut along the radial direction of the wind wheel body (100) is of an inward concave arc structure;

in two adjacent blade bodies (200), the root of a windward surface (210) on one wind wheel body (100) is in arc transition connection with the root of a leeward surface (220) on the other blade body (200) through a guide surface (230) which is arc-shaped and inwards concave.

2. The novel dental handpiece wind wheel according to claim 1, characterized in that:

the cross-sectional area of the blade body (200) decreases from the root end to the free end.

3. The novel dental handpiece wind wheel according to claim 1, characterized in that:

and inclined chamfers (221) are arranged at two corners of the leeward side (220) of the free end along the axial direction of the wind wheel body (100).

4. The novel dental handpiece wind wheel according to claim 3, characterized in that:

and extension parts (240) extending outwards along the axial direction are arranged at the two end sides of the free end along the axial direction of the wind wheel body (100).

5. The novel dental handpiece wind wheel according to claim 4, characterized in that:

the plurality of extending parts (240) on each end side surround a circular guide groove (300), and the guide grooves (300) are communicated with the gaps between two adjacent blade bodies (200).

6. The novel dental handpiece wind wheel according to claim 5, characterized in that:

the wind wheel is characterized in that a through-type shaft hole (110) is formed in the center of the wind wheel body (100), and annular convex rings (111) are arranged on the outer edges of two ends of the shaft hole (110) in a protruding mode.

7. The novel dental handpiece wind wheel according to claim 6, characterized in that:

the height of the protruding ring (111) is smaller than the height of the extension (240).

8. A drive shaft structure characterized in that: the novel dental handpiece wind wheel comprises the novel dental handpiece wind wheel according to any one of claims 1 to 7, and further comprises a hollow driving shaft body (400), wherein the driving shaft body (400) and the wind wheel body (100) are coaxially arranged, two ends of the driving shaft body (400) are arranged on two end sides of the wind wheel body (100), and two ends of the driving shaft body (400) are respectively sleeved with a rotating bearing (410).