Dental handpiece cooling structure

Abstract

The utility model discloses a dental handpiece cooling structure which comprises a handpiece and a handle, the handpiece is fixed at one end of the handle, a middle shaft, a wind wheel, an upper bearing and a lower bearing are arranged in the handpiece, the middle shaft rotates in the handpiece through the upper bearing and the lower bearing, the lower end of the middle shaft extends out of the handpiece and is connected with a machine needle, and the machine needle is connected with the wind wheel. The wind wheel is connected to the outer wall of the middle shaft between the upper bearing and the lower bearing, an upper annular cavity and a lower annular cavity are formed in the side wall, corresponding to the upper bearing and the lower bearing, of the machine head, and the upper annular cavity and the lower annular cavity are provided with a communication channel in the side wall opposite to the side where the machine head and the handle are connected; an air inlet channel, an exhaust channel, a cold water channel and an atomized air channel are arranged in the handle, the air inlet channel and the exhaust channel are both communicated with the inner area of the machine head where the wind wheel is located, and the cold water channel is communicated with the upper annular cavity. An independent cooling structure does not need to be arranged for the bearing and the bur, the structure is simplified, and the cooling effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, concretely relates to a dental handpiece cooling structure. BACKGROUND

[0002] The dental handpiece is a kind of commonly used medical equipment in stomatology department, its working principle is to use air compressor to compress air into high-pressure gas to drive turbine to drive needle high-speed rotation, the rotating speed is usually around 360,000 revolutions per minute, to cut teeth to remove damaged tissue, or prepare porcelain teeth, it can also be used for grinding dentures and other oral treatment.To avoid the needle of handpiece from being heated and aged due to high-speed grinding and the occurrence of medical accidents, the needle needs to be cooled in time, usually, spray holes are arranged at the end of the handpiece or the handle close to the handpiece, but during the high-speed operation of the needle, the bearing in the handpiece will also generate high temperature, which also needs to be cooled, and currently, another cooling structure is usually arranged to cool the bearing, so that the cooling mechanism is too complex. UTILITARY MODEL

[0003] The utility model is to provide a dental handpiece cooling structure to solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a dental handpiece cooling structure, including handpiece and handle, the handpiece is fixed to one end of handle, the handpiece is equipped with middle shaft, wind wheel, upper bearing and lower bearing, the middle shaft rotates in the handpiece through upper bearing and lower bearing, the lower end of middle shaft extends out of the handpiece and is connected with needle, the wind wheel is connected to the outer wall of middle shaft between upper bearing and lower bearing, the side wall of handpiece is equipped with upper annular cavity and lower annular cavity corresponding to upper bearing and lower bearing, the upper annular cavity and lower annular cavity are equipped with communication passage in the opposite side wall of handpiece and handle connection side;The handle is equipped with air inlet channel, air outlet channel, cold water channel and atomization gas channel, air inlet channel and air outlet channel are communicated with the internal area of handpiece where wind wheel is located, cold water channel is communicated with upper annular cavity, and atomization gas channel is communicated with spray channel penetrating the lower side wall of handle and facing needle in the side close to handpiece, and lower annular cavity is equipped with water outlet channel communicated with spray channel in the handpiece and handle connection side.

[0005] As the preferred of the technical scheme, the handpiece includes machine body and machine cover, the machine cover is arranged at the upper end of machine body, and the machine cover and machine body are detachably connected.

[0006] As the preferred of the technical scheme, the middle shaft and machine body are equipped with sealing ring.

[0007] As the preferred of the technical scheme, the diameter of water outlet channel is less than the diameter of spray channel.

[0008] Compared with the prior art, the utility model discloses the beneficial effect is: the utility model discloses the upper annular cavity and lower annular cavity corresponding with the bearing of setting in the lateral wall of the head, the cold water channel in the handle and upper annular cavity intercommunication, upper annular cavity and lower annular cavity are equipped with the communicating channel, lower annular cavity sets up and the water outlet channel of spray channel intercommunication, the cold water of cold water channel in the handle can be cooled after entering spray channel again, and the gas of atomization gas channel is atomized and is sprayed to the needle of car and is cooled, need not to set up the cooling structure of bearing and car needle separately, simple structure, and the cooling effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the structural schematic diagram of the utility model.

[0010] Figure 2 It is the structural schematic diagram of the head of the utility model.

[0011] Figure 3 It is Figure 2 A-A view in.

[0012] In the drawing: 1, head, 1.1, machine cover, 1.2, machine body, 2, handle, 3, upper bearing, 4, wind wheel, 5, middle shaft, 6, needle of car, 7, upper annular cavity, 8, lower annular cavity, 9, communicating channel, 10, air inlet channel, 11, exhaust channel, 12, cold water channel, 13, atomization gas channel, 14, water outlet channel, 15, spray channel, 16, sealing ring, 17, lower bearing. DETAILED DESCRIPTION

[0013] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the range of protection of the utility model.

[0014] Please refer to Figures 1-3The utility model discloses a dental handpiece cooling structure, this dental handpiece includes the handle 2 of head 1, head 1 is fixed in the one end of handle 2, be equipped with middle axle 5, wind wheel 4, upper bearing 3 and lower bearing 17 in head 1, middle axle 5 rotates in head 1 through upper bearing 3 and lower bearing 17, namely the upper portion of middle axle 5 and upper bearing 3 rotation connection, the lower part of middle axle 5 and lower bearing 17 rotation connection, upper bearing 3 and lower bearing 17 all are fixed on the inner wall of head 1, the lower end of middle axle 5 extends out of head 1 and is connected car needle 6, wind wheel 4 is connected on the outer wall of middle axle 5 between upper bearing 3 and lower bearing 17, the side wall of head 1 is equipped with upper annular cavity 7 and lower annular cavity 8 corresponding to upper bearing 3 and lower bearing 17, upper annular cavity 7 and lower annular cavity 8 are equipped with the communication passage 9 in the opposite side wall of the handle 2 connection side of head 1. Handle 2 is equipped with air inlet channel 10, exhaust passage 11, cold water channel 12 and atomization gas channel 13, air inlet channel 10 and exhaust passage 11 all are communicated with the inside area of head 1 where wind wheel 4 is located, cold water channel 12 and upper annular cavity 7 are communicated, and atomization gas channel 13 is communicated with the spray channel 15 that penetrates handle 2 lower side wall and is towards car needle 6 in the handle 2 side close to head 1, and lower annular cavity 8 is equipped with the water outlet channel 14 that is communicated with spray channel 15 in the handle 2 connection side of head 1.

[0015] The utility model discloses when the specific implementation, head 1 includes the body 1.2 of machine and machine cover 1.1, machine cover 1.1 is located at the upper end of body 1.2, machine cover 1.1 and body 1.2 are connected by bolt and can be dismantled, the wall thickness of upper annular cavity 7 and lower annular cavity 8 in the side of upper bearing 3 and lower bearing 17 is less than the wall thickness of the other side, is more favorable to the cooling of bearing, and the sealing ring 16 is equipped between middle axle 5 and body 1.2, and the diameter of water outlet channel 14 is less than the diameter of spray channel 13.

[0016] The utility model discloses when working, compressed gas is communicated to the inside of head through air inlet channel, drives wind wheel to rotate, then gas is discharged again from exhaust passage, cold water is communicated to upper annular cavity through cold water channel, and from the two sides of import is circulated to the other side, and the cooling of upper bearing is carried out, reaches the other side and flows to lower annular cavity in the communication passage, and is circulated to the handle connection side of head, enters spray channel through water outlet channel, and the gas atomization of atomization gas channel is sprayed to car needle, and car needle is cooled.

[0017] Finally, it should be noted that: in the described embodiment, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

Claims

1. A dental handpiece cooling structure, the dental handpiece comprising a handpiece and a handle, the handpiece being fixed to one end of the handle, characterized in that: The machine head is internally provided with a middle shaft, a wind wheel, an upper bearing and a lower bearing, the middle shaft rotates in the machine head through the upper bearing and the lower bearing, the lower end of the middle shaft extends out of the machine head and is connected with the car needle, the wind wheel is connected to the outer wall of the middle shaft between the upper bearing and the lower bearing, the side wall of the machine head corresponding to the upper bearing and the lower bearing is internally provided with an upper annular cavity and a lower annular cavity, the upper annular cavity and the lower annular cavity are internally provided with a communication passage on the side wall opposite to the side where the machine head and the handle are connected; the handle is internally provided with an air inlet passage, an air outlet passage, a cold water passage and an atomizing gas passage, the air inlet passage and the air outlet passage are both communicated with the internal region of the machine head where the wind wheel is located, the cold water passage is communicated with the upper annular cavity, the atomizing gas passage is communicated with a spraying passage which penetrates through the lower side wall of the handle and is directed to the car needle near the machine head side, the lower annular cavity is provided with a water outlet passage which is communicated with the spraying passage at the side where the machine head and the handle are connected.

2. The dental handpiece cooling structure of claim 1, wherein: The machine head comprises a machine body and a machine cover, the machine cover is arranged at the upper end of the machine body, and the machine cover and the machine body are detachably connected.

3. The dental handpiece cooling structure of claim 2, wherein: A sealing ring is arranged between the middle shaft and the machine body.

4. The dental handpiece cooling structure of claim 1, wherein: The diameter of the water outlet passage is smaller than the diameter of the spraying passage.

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