CN214660817U

CN214660817U - Tooth washing device and liquid pumping mechanism thereof

Info

Publication number: CN214660817U
Application number: CN202120241688.8U
Authority: CN
Inventors: 刘信全; 唐勇
Original assignee: Fly Cat Electrical Co Ltd
Current assignee: Fly Cat Electrical Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-11-09
Anticipated expiration: 2031-01-28

Abstract

The utility model provides a tooth washing device and a liquid pumping mechanism thereof, the liquid pumping mechanism comprises a shell, a first screw rod, a second screw rod, a driver and a speed reducing mechanism, the shell is provided with an accommodating cavity, a liquid inlet and a liquid outlet which are communicated with the accommodating cavity, the first screw rod and the second screw rod are arranged in the accommodating cavity in parallel and are both rotationally connected with the shell; the driver is arranged outside the accommodating cavity, the speed reducing mechanism is connected with an output shaft of the driver, and drives the first screw rod and the second screw rod to rotate under the driving of the driver, so that negative pressure is generated in the accommodating cavity and liquid is sucked into the accommodating cavity from the liquid inlet, and the liquid in the accommodating cavity is extruded from the liquid outlet when the first screw rod and the second screw rod rotate. The utility model discloses a tooth cleaning device and pump liquid mechanism thereof utilizes the rotation of first screw rod and second screw rod for hold the intracavity and produce the negative pressure and hold the chamber with liquid suction, and will hold the liquid of intracavity and discharge from the liquid outlet, the pump liquid continuity of this kind of pump liquid mechanism is good, and pump liquid process noise is little, shakes lowly.

Description

Tooth washing device and liquid pumping mechanism thereof

Technical Field

The utility model relates to a clean tooth technical field especially relates to a tooth cleaning device and pump liquid mechanism thereof.

Background

In the existing tooth flushing device, an eccentric gear is usually adopted to drive a piston connecting rod structure to reciprocate in a pump body, so that high-pressure water is formed and is sprayed out from a spray head. However, the tooth flusher generates a loud noise when working, and the continuity of the pump liquid is poor.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a tooth cleaning device and pump liquid mechanism thereof effectively solves the great and poor technical problem of pump liquid continuity of noise at work.

The utility model provides a pair of pump liquid mechanism, include:

the shell is provided with a cavity, and a liquid inlet and a liquid outlet which are communicated with the cavity;

the first screw rod is arranged in the containing cavity and is rotationally connected with the shell;

the second screw rod is arranged in the containing cavity, is parallel to the first screw rod and is rotationally connected with the shell;

a driver disposed outside the cavity, the driver having an output shaft, an

The speed reducing mechanism is connected with an output shaft of the driver and drives the first screw rod and the second screw rod to rotate under the driving of the driver, so that negative pressure is generated in the cavity to suck liquid into the cavity from the liquid inlet, and the liquid in the cavity is extruded from the liquid outlet when the first screw rod and the second screw rod rotate.

In one embodiment, when the driver is operated, the first screw rod and the second screw rod rotate in opposite directions, and the spiral direction of the threads of the first screw rod is opposite to the spiral direction of the threads of the second screw rod.

In one embodiment, the threads of the first screw and the threads of the second screw are engaged with each other and form a gap, and when the first screw and the second screw rotate synchronously, the liquid in the cavity is extruded from the gap to the liquid outlet under the rotation of the threads of the first screw and the second screw.

In one embodiment, the position where the first screw and the second screw are engaged with each other is opposite to the liquid outlet, or the first screw and the second screw are symmetrically arranged with the axis of the liquid outlet as a symmetry axis.

In one embodiment, the end of the first screw is provided with a first gear, the end of the second screw is provided with a second gear, and the first gear and the second gear are meshed with each other.

In one embodiment, the speed reducing mechanism comprises a driving gear, a duplicate gear, a transmission gear and a gear shaft, the driving gear is fixed on the output shaft of the driver and is meshed with the transmission gear through the duplicate gear, and the transmission gear is coaxially connected with the first screw rod through the gear shaft.

In one embodiment, the housing includes a main shell, a first end cover and a second end cover, the main shell includes two cavities separated by a blocking wall, the blocking wall is provided with a shaft hole, the liquid outlet is disposed in the first end cover, the first end cover is connected with one side of the main shell and encloses to form the accommodating cavity, the second end cover is connected with the other side of the main shell and encloses to form the accommodating cavity, the speed reducing mechanism is disposed in the accommodating cavity, and the gear shaft is rotatably disposed through the shaft hole.

In one embodiment, a sealing ring is sleeved on the gear shaft and used for sealing a gap between the gear shaft and the shaft hole, a sealing ring is arranged between the first end cover and the main shell, and the sealing ring is used for sealing the gap between the first end cover and the main shell.

In one embodiment, the liquid inlet is provided with a liquid inlet joint, and the liquid inlet joint is connected with the liquid inlet in a sealing manner.

In one embodiment, the drive comprises a motor or a servomotor.

In another aspect, the present application provides a dental prophylaxis device comprising the above-described pump mechanism.

The utility model provides a tooth cleaning device and pump liquid mechanism thereof, this pump liquid mechanism include casing, first screw rod, second screw rod, driver and reduction gears, utilize first screw rod and second screw rod at the rotation that holds the intracavity of casing for hold intracavity production negative pressure and hold the chamber with liquid suction, and will hold the liquid of intracavity from with hold the liquid outlet discharge that the chamber communicates, through the pump liquid mechanism of this kind of structure, can obtain the better pump liquid effect of continuity, and pump liquid process noise is little, vibrations are low.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, drawings of other embodiments can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of a pump mechanism of a dental prophylaxis device according to an embodiment;

FIG. 2 is a schematic cross-sectional view of a pumping mechanism according to an embodiment;

FIG. 3 is an exploded schematic view of the pumping mechanism shown in FIG. 1;

FIG. 4 is a schematic diagram of a further exploded view of the pumping mechanism shown in FIG. 3;

FIG. 5 is a schematic view showing the connection of the actuator to the first screw and the second screw via the speed reducing mechanism in the fluid pumping mechanism according to the embodiment;

fig. 6 is a schematic view showing an assembly structure of the speed reduction mechanism, the first screw, and the second screw located inside the housing when the main casing of the housing is half-cut in the liquid pumping mechanism according to the embodiment.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do 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, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, the present invention provides a liquid pumping mechanism 100 for installation in a tooth washing device to pump liquid and discharge the liquid, thereby satisfying the tooth cleaning requirement. It should be noted that the liquid in the present application may also be water, or may also be a mixed liquid of a detergent and water to enhance the cleaning effect, and the type of the liquid is not limited herein.

As shown in fig. 2 to 4, the pumping mechanism 100 includes a housing 10, a first screw 20, a second screw 30, a driver 40, and a reduction mechanism 50.

The housing 10 has a cavity 10a, and a liquid inlet 101 and a liquid outlet 102 which are communicated with the cavity 10a, wherein the liquid inlet 101 is used for allowing liquid to flow into the cavity 10a when the cavity 10a forms negative pressure, and the liquid outlet 102 is used for allowing liquid to be discharged from the cavity 10 a.

The first screw 20 and the second screw 30 are both arranged in the accommodating cavity 10a, the first screw 20 and the second screw 30 are arranged in parallel and are both rotatably connected with the casing 10, so that negative pressure can be formed in the accommodating cavity 10a when the first screw 20 and the second screw 30 rotate relative to the casing 10, and liquid is sucked into the accommodating cavity 10 a. Since the first screw 20 and the second screw 30 have corresponding screw threads, the liquid in the chamber 10a is discharged from the liquid outlet 102 by the screw threads 30a of the first screw 20 and the second screw 30.

In this embodiment, the driver 40 is disposed outside the cavity 10a, so that the space of the cavity 10a is not occupied, and the influence of the driver 40 contacting the liquid on the use function is avoided. The driver 40 is used to power the rotational movement of the first screw 20 and the second screw 30.

Specifically, the driver 40 is connected to the speed reducing mechanism 50, and is configured to drive the first screw 20 and the second screw 30 to rotate synchronously through the speed reducing mechanism 50, so that when the driver 40 operates, the speed reducing mechanism 50 can increase the rotation torque output by the driver 40, so as to drive the first screw 20 and the second screw 30 to rotate smoothly relative to the housing 10, so as to suck the liquid from the liquid inlet 101 into the cavity 10a and extrude the liquid from the liquid outlet 102.

According to the liquid pumping mechanism 100, negative pressure is generated in the cavity 10a by utilizing the rotation of the first screw 20 and the second screw 30, so that liquid is sucked into the cavity 10a, and the liquid in the cavity 10a is discharged from the liquid outlet 102 when the first screw 20 and the second screw 30 rotate, so that high hydraulic pressure is obtained, the continuity of the continuous liquid pumping of the liquid pumping mechanism 100 is good, so that teeth can be washed, and the tooth cleaning effect is improved; and the spiral way is used for sucking and discharging liquid, so that the noise is low and the vibration is low.

The driver 40 may be a motor or a servo motor, and is not limited herein as long as it can be adapted to drive the first and

second screws

20 and 30 to rotate.

As shown in fig. 5 and 6, when the driver 40 is operated, the first screw 20 and the second screw 30 rotate in opposite directions, and the spiral direction of the thread 20a of the first screw 20 is opposite to the spiral direction of the thread 30a of the second screw 30. With this arrangement, the first screw 20 and the second screw 30 have a thrust force between them for the liquid in the cavity 10a, and then have a strong converging effect for the liquid, so that the liquid can maintain a stable impact force when being discharged from the liquid outlet 102.

Further, the screw thread 20a of the first screw 20 and the screw thread 30a of the second screw 30 are engaged with each other, and a gap is formed by which the liquid can flow. Specifically, when the first screw 20 and the second screw 30 rotate synchronously, the liquid in the cavity 10a is squeezed from the gap to the liquid outlet 102 under the rotation of the threads 30a of the first screw 20 and the second screw 30, so as to form a stable high-pressure liquid, so as to flush the teeth, thereby obtaining a good tooth cleaning effect.

In some embodiments, the first screw 20 and the second screw 30 are engaged with each other at a position opposite to the liquid outlet 102, so that the liquid can be timely extruded from the liquid outlet 102 by the cooperation of the first screw 20 and the second screw 30, so as to increase the impact force of the liquid discharged from the liquid outlet 102 as much as possible, thereby obtaining better tooth cleaning effect.

The first screw 20 and the second screw 30 are symmetrically arranged with the axis of the liquid outlet 102 as a symmetry axis, and at this time, the liquid outlet 102 is located between the first screw 20 and the second screw 30. Since the first screw 20 and the second screw 30 have the effect of converging the liquid therebetween during the rotation process relative to the housing 10, so that the liquid outlet 102 is located between the first screw 20 and the second screw 30, the first screw 20 and the second screw 30 can discharge the liquid converged to the middle from the liquid outlet 102 in time, so as to obtain high-pressure liquid, thereby providing higher impact force and improving the tooth cleaning effect.

In some embodiments, the first screw 20 and the second screw 30 are engaged with each other to achieve synchronous and opposite movements.

As shown in fig. 4 to 6, a first gear 21 is disposed at an end of the first screw 20, a second gear 31 is disposed at an end of the second screw 30, and the first gear 21 and the second gear 31 are engaged with each other. When the first screw 20 rotates, the first gear 21 drives the second gear 31 in a meshing manner along with the rotation of the first screw 20, so that the second screw 30 is driven by the second gear 31 to rotate, and the rotation direction of the second screw 30 is opposite to that of the first screw 20 due to the opposite rotation directions of the first gear 21 and the second gear 31 which are meshed with each other, so that the liquid in the cavity 10a is stably extruded, and high-pressure liquid is obtained, and the tooth cleaning effect is improved.

In some embodiments, the reduction mechanism 50 includes a drive gear 51, a dual gear 52, a transmission gear 53, and a gear shaft 54. The driving gear 51 is fixed on the output shaft 40a of the driver 40, and is engaged with the transmission gear 53 through the dual gear 52, and the transmission gear 53 is coaxially connected with the first screw 20 through the gear shaft 54, so that when the transmission gear 53 rotates, the first screw 20 can be driven to rotate through the gear shaft 54.

Both ends of the gear shaft 54 are provided with flat mouth positions 54b so as to respectively limit the transmission gear 53 and the first screw 20 at the flat mouth positions 54b, so that the transmission gear 53 stably drives the first screw 20 to rotate through the gear shaft 54.

In some embodiments, the gear shaft 54 and the first screw 20 may be fixed together by welding, clamping, or the like, and the connection manner of the transmission gear 53, the gear shaft 54 and the first screw 20 is not limited herein, as long as the transmission gear 53 can drive the first screw 20 to rotate via the gear shaft 54 when rotating.

It should be noted that the gear shaft 54 may be directly connected to the first screw 20 or indirectly connected thereto. For example, in the embodiment where the first gear 21 is disposed at the end of the first screw 20, the gear shaft 54 may be connected to the shaft hole of the first gear 21, so that when the transmission gear 53 rotates, the gear shaft 54 drives the first gear 21 to rotate, and at this time, the first screw 20 rotates, and at the same time, the second screw 30 rotates in the opposite direction by the engagement of the first gear 21 with the second gear 31.

The reduction mechanism 50 may also be a planetary reduction gear. The speed reduction mechanism 50 may have another structure as long as the rotation torque output from the actuator 40 can be increased by the form of speed reduction, and the type of the speed reduction mechanism 50 is not limited herein.

Referring to fig. 2 and 4, the housing 10 includes a main housing 11, a first end cap 12 and a second end cap 13, and the main housing 11 includes two chambers separated by a blocking wall 103, so that the first end cap 12 and the second end cap 13 are disposed behind the main housing 11 to form separate chambers, thereby facilitating the disposition of the first screw 20 and the second screw 30, and the reduction mechanism 50.

The first end cap 12 is connected to one side of the main housing 11, and encloses the cavity 10a, and the liquid outlet 102 is disposed in the first end cap 12. The second end cap 13 is connected to the other side of the main housing 11 and encloses to form an accommodation cavity 10b, and the speed reducing mechanism 50 is disposed in the accommodation cavity 10 b.

In this embodiment, the speed reduction mechanism 50 is disposed in the housing chamber 10b so that the speed reduction mechanism 50 does not occupy the space of the housing chamber 10 a. The first screw 20 and the second screw 30 are arranged in the cavity 10a, so that the arrangement of the whole structure is simplified, and negative pressure as large as possible can be generated in the cavity 10a when the first screw 20 and the second screw 30 rotate, so that liquid can be sucked into the cavity 10a from the liquid inlet 101 and discharged from the liquid outlet 102.

The blocking wall 103 is provided with a shaft hole 103a, and the gear shaft 54 is rotatably inserted into the shaft hole 103a, so as to transmit the rotation torque of the transmission gear 53 to the first screw 20 located in the cavity 10a, so that the first screw 20 can rotate under the driving of the transmission gear 53.

As shown in fig. 2 and 4, a sealing ring 54a is sleeved on the gear shaft 54, and the sealing ring 54a is used for sealing a gap between the gear shaft 54 and the shaft hole 103a, so that the liquid in the cavity 10a cannot leak out from the gap between the gear shaft 54 and the shaft hole 103 a. A sealing ring 12a is arranged between the first end cap 12 and the main casing 11, and the sealing ring 12a is used for sealing a gap between the first end cap 12 and the main casing 11, so that the overall sealing performance of the cavity 10a is good, and when the first screw 20 and the second screw 30 rotate in the cavity 10a, a large negative pressure can be formed and sucked into the cavity 10a from the liquid inlet 101 and discharged from the liquid outlet 102, so that a stable high-pressure liquid is obtained, and the tooth cleaning effect is improved.

As shown in fig. 3 and 4, the liquid inlet 101 is provided with a liquid inlet joint 104, and the liquid inlet joint 104 is connected with the liquid inlet 101 in a sealing manner, for example, a sealing sleeve 104a is provided between the liquid inlet joint 104 and a side wall of the liquid inlet 101, so that a good seal is formed between the liquid inlet joint 104 and the housing 10 to prevent liquid leakage. Through the structure, the overall sealing performance of the cavity 10a is better, so that when the driver 40 drives the first screw 20 and the second screw 30 to rotate, the negative pressure generated in the cavity 10a is good, and liquid enters the cavity 10a from the liquid inlet joint 104.

It should be noted that the inlet fitting 104 is adapted to be connected to a reservoir of a dental cleaning apparatus such that when sufficient liquid is stored in the reservoir, the pumping mechanism 100 is capable of continuously pumping liquid from the reservoir and ultimately discharging the liquid from the outlet 102 as pressurized liquid for cleaning teeth.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A fluid pumping mechanism, comprising:

a driver disposed outside the cavity, the driver having an output shaft, an

2. The pumping mechanism of claim 1, wherein the first screw and the second screw rotate in opposite directions when the actuator is operated, the direction of the helix of the threads of the first screw being opposite to the direction of the helix of the threads of the second screw.

3. The fluid pumping mechanism of claim 2, wherein the threads of the first screw and the threads of the second screw are engaged with each other and form a gap, and when the first screw and the second screw rotate synchronously, the fluid in the chamber is squeezed from the gap toward the fluid outlet under the rotation of the threads of the first screw and the second screw.

4. The fluid pumping mechanism according to claim 3, wherein the first screw and the second screw are engaged with each other at a position opposite to the fluid outlet, or the first screw and the second screw are symmetrically arranged with respect to an axis of the fluid outlet as a symmetry axis.

5. The pumping mechanism as claimed in claim 3, wherein the first screw has a first gear at an end thereof, and the second screw has a second gear at an end thereof, and the first gear and the second gear are engaged with each other.

6. The pumping mechanism as claimed in claim 3, wherein the reduction mechanism comprises a driving gear, a duplicate gear, a transmission gear and a gear shaft, the driving gear is fixed to the output shaft of the driver and is engaged with the transmission gear through the duplicate gear, and the transmission gear is coaxially connected with the first screw through the gear shaft.

7. The fluid pumping mechanism as claimed in claim 6, wherein the housing includes a main casing, a first end cap and a second end cap, the main casing includes two cavities separated by a blocking wall, the blocking wall is provided with a shaft hole, the fluid outlet is disposed on the first end cap, the first end cap is connected to one side of the main casing and encloses to form the receiving cavity, the second end cap is connected to the other side of the main casing and encloses to form the receiving cavity, the speed reduction mechanism is disposed in the receiving cavity, and the gear shaft is rotatably disposed through the shaft hole.

8. The pumping mechanism as claimed in claim 7, wherein a sealing ring is sleeved on the gear shaft, the sealing ring is used for sealing a gap between the gear shaft and the shaft hole, a sealing ring is arranged between the first end cover and the main casing, and the sealing ring is used for sealing a gap between the first end cover and the main casing.

9. The pumping mechanism as claimed in claim 1, wherein an inlet joint is provided at the inlet, and the inlet joint is connected with the inlet in a sealing manner.

10. The pumping mechanism of claim 1, wherein the drive comprises a motor or a servo-motor.

11. A dental prophylaxis device comprising a pumping mechanism according to any of claims 1 to 10.