CN114198296B - Shaft sleeve assembly, tooth flushing device water pump and tooth flushing device - Google Patents
Shaft sleeve assembly, tooth flushing device water pump and tooth flushing device Download PDFInfo
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- CN114198296B CN114198296B CN202111479603.0A CN202111479603A CN114198296B CN 114198296 B CN114198296 B CN 114198296B CN 202111479603 A CN202111479603 A CN 202111479603A CN 114198296 B CN114198296 B CN 114198296B
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- magnetic attraction
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- piston shaft
- attraction piece
- magnetic
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
- A61C17/02—Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention belongs to the technical field of micropumps of tooth flushers, and provides a shaft sleeve assembly which is used for a water pump, and comprises a piston shaft arranged in the water pump; the first magnetic attraction piece and the second magnetic attraction piece are arranged along the axial direction of the piston shaft at intervals of a preset distance and can synchronously move with the piston shaft; the electromagnetic piece is arranged between the first magnetic attraction piece and the second magnetic attraction piece, and the electromagnetic piece attracts or repels at least one of the first magnetic attraction piece and the second magnetic attraction piece so as to drive the piston shaft to linearly reciprocate along the axial direction. The shaft sleeve assembly can drive the piston shaft to linearly move, and the stable and reliable movement is ensured.
Description
Technical Field
The invention belongs to the technical field of micropumps of tooth flushers, and particularly relates to a shaft sleeve assembly, a tooth flusher water pump and a tooth flusher.
Background
The tooth-rinsing device is widely applied as a novel oral cavity cleaning device, and has the effects of protecting periodontal health, treating gingivitis, correcting deformity and repairing dental crowns.
The water pump of the tooth-flushing device is used as a part in the tooth-flushing device, the water pump is used for pressurizing a water source to generate superfine high-pressure pulse water columns, and the high-pressure pulse water columns can be flushed to any part of an oral cavity without any obstacle through the nozzle, including tooth gaps and deep gums which are not easily touched by toothbrushes, line pressing and toothpicks, so that dental plaque on the tooth surfaces can be effectively cleaned, and the cleanliness of the oral cavity is maintained.
In the prior art, the structure of the water pump of the traditional tooth-flushing device mostly adopts a cam to drive a piston pull rod to move, a piston moves in a cavity of the tooth-flushing device, and the piston is utilized to move to generate superfine high-pressure pulse water columns. However, in the mode that the circular motion of the cam is converted into the linear motion of the piston, the motion of the piston pull rod is not completely linear motion, so that the stress of the piston is uneven, the stability is not high, the abrasion force of the piston is increased, the service life of the piston is shortened, and the service life of the tooth washer is further influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a shaft sleeve assembly which can drive a piston shaft to linearly move so as to ensure stable and reliable movement.
The invention further aims to provide the tooth-flushing device water pump, which is applied to the shaft sleeve assembly, so that the water pump can work stably, an ultrafine high-pressure pulse water column is provided, and the service life of the water pump is prolonged.
It is still another object of the present invention to provide a dental appliance, wherein the water pump is applied to the dental appliance to improve the service life of the dental appliance.
To achieve the purpose, the invention adopts the following technical scheme:
the invention provides a shaft sleeve assembly for a water pump, which comprises:
the piston shaft is arranged in the water pump;
the first magnetic attraction piece and the second magnetic attraction piece are arranged along the axial direction of the piston shaft at preset intervals and can synchronously move with the piston shaft;
the electromagnetic piece is arranged between the first magnetic piece and the second magnetic piece, and the electromagnetic piece adsorbs or repels at least one of the first magnetic piece and the second magnetic piece so as to drive the piston shaft to linearly reciprocate along the axial direction.
Further preferably, the piston shaft is provided with a step positioning surface, and the first magnetic attraction piece penetrates through the piston shaft and one end surface of the first magnetic attraction piece abuts against the step positioning surface.
Still preferably, the piston shaft comprises a sleeve sleeved on the piston shaft and synchronously moving with the piston shaft, one end of the sleeve is propped against the first magnetic attraction piece, and the other end of the sleeve is propped against the second magnetic attraction piece.
Further preferably, the method further comprises:
the sliding piece is sleeved at one end of the first magnetic attraction piece and one end of the sleeve, the sliding piece is sleeved at the other end of the second magnetic attraction piece and the other end of the sleeve, and the sliding piece limits the relative rotation of the first magnetic attraction piece, the second magnetic attraction piece and the sleeve;
the slide provides guidance for the axial linear reciprocation of the piston shaft.
Further preferably, the inner wall of the sliding piece is provided with point ribs, and the sliding piece is in interference fit with the first magnetic attraction piece and the second magnetic attraction piece through the point ribs.
Further preferably, a tangential plane is provided on the inner hole wall of the sliding piece, and the tangential plane is in interference fit with the outer wall of the sleeve.
Further preferably, the tangential surfaces are uniformly distributed along the circumferential direction of the inner wall of the sliding member.
Further preferably, the piston further comprises a stopper for resisting the axial movement of the second magnetic attraction member along the piston shaft, and the stopper is provided at an end of the piston shaft.
The invention also provides a tooth-flushing device water pump which comprises the shaft sleeve assembly, and the tooth-flushing device water pump can generate a pulse water column.
The invention also provides a tooth-flushing device, which comprises the tooth-flushing device water pump.
Compared with the prior art, the invention has the following beneficial effects: compared with the prior art in which a cam is utilized to drive a piston pull rod to move, the shaft sleeve assembly drives the piston shaft to reciprocate in a linear motion by controlling the adsorption force or repulsive force generated by the electromagnetic piece on the first magnetic piece and the second magnetic piece, so that the stable and reliable motion is ensured.
The structural form of the shaft sleeve assembly can drive the piston shaft to linearly reciprocate, so that the stress of the piston arranged on the piston shaft is uniform and stable in the moving process, the abrasion of the piston is greatly reduced, the service life of the piston is prolonged, and the service life of the water pump is prolonged.
Drawings
FIG. 1 is a schematic view of a bushing assembly according to the present invention;
FIG. 2 is an enlarged view of the structure at A of FIG. 1 in the present invention;
FIG. 3 is a cross-sectional view taken along line B-B in FIG. 1 in accordance with the present invention;
fig. 4 is a cross-sectional view taken along line C-C in fig. 1 in accordance with the present invention.
Wherein, 1, the piston shaft; 11. a step positioning surface; 2. a first magnetic attraction member; 3. a second magnetic attraction member; 4. a magnetic attraction piece; 5. a sleeve; 6. a slider; 61. a rib is dotted; 62. cutting into sections; 7. a stop.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
As shown in fig. 1 to 4, the present embodiment provides a shaft sleeve assembly which is applied to a water pump, and the water pump is mainly applied to a tooth washer.
The tooth cleaning device comprises a water pump and a nozzle, wherein the water pump generates ultra-fine high-pressure pulse water columns through the linear motion of the shaft sleeve component so as to flush any part of an oral cavity, the ultra-fine high-pressure pulse water columns can flush any part of the oral cavity without any obstacle through the nozzle of the tooth cleaning device, including tooth gaps, deep gums and the like, dental plaque on the tooth surfaces is effectively removed, food residues accumulated in tooth gaps which cannot be reached by toothbrushes and dental floss are forcefully removed, so that oral bacteria breeding is reduced, tooth decay, gingivitis and periodontitis are effectively prevented, gums can be massaged and stimulated, blood circulation is improved, toothache is relieved, and gingival bleeding is controlled.
Specifically, the shaft sleeve assembly comprises a piston shaft 1, a first magnetic attraction piece 2, a second magnetic attraction piece 3 and an electromagnetic piece 4, wherein the piston shaft 1 is arranged inside the water pump, a piston is arranged on the piston shaft 1, and the piston shaft 1 linearly reciprocates along the axial direction of the piston shaft. The first magnetic attraction piece 2 and the second magnetic attraction piece 3 are arranged along the axial direction of the piston shaft 1 at preset intervals, and the first magnetic attraction piece 2 and the second magnetic attraction piece 3 can synchronously move with the piston shaft 1. The electromagnetic member 4 is disposed between the first magnetic attraction member 2 and the second magnetic attraction member 3, and the electromagnetic member 4 attracts or repels at least one of the first magnetic attraction member 2 and the second magnetic attraction member 3 to drive the piston shaft 1 to linearly reciprocate along the axial direction.
In this embodiment, compared with the prior art in which the cam is used to drive the piston rod to move, the above-mentioned shaft sleeve assembly drives the reciprocating linear motion of the piston shaft 1 by controlling the adsorption force or repulsion force generated by the electromagnetic member 4 to the first magnetic attraction member 2 and the second magnetic attraction member 3, so as to ensure stable and reliable motion.
The structural form of the shaft sleeve assembly can drive the piston shaft 1 to linearly reciprocate, so that the stress of a piston arranged on the piston shaft 1 is uniform and stable in the moving process, the abrasion of the piston is greatly reduced, the service life of the piston is prolonged, and the service life of the water pump is prolonged.
In this embodiment, the preset distance is determined according to factors such as the size of the piston, the amount of water of the water column generated by each injection, and the movement stroke of the piston shaft 1, and is specifically determined according to actual needs.
Preferably, the first magnetic attraction piece 2 and the second magnetic attraction piece 3 are magnets, the cost of the magnets is low, and the movement stroke is easy to control.
Further preferably, in this embodiment, by adjusting the direction of the current flowing through the electromagnetic member 4, the attraction or repulsion of the electromagnetic member 4 to the first magnetic attraction member 2 and the second magnetic attraction member 3 is controlled, so as to realize the reciprocating linear motion of the piston shaft 1.
Specifically, in the present embodiment, the electromagnetic member 4 is disposed between the first magnetic attraction member 2 and the second magnetic attraction member 3, and when the electromagnetic member 4 generates an attraction force to the first magnetic attraction member 2 and simultaneously generates a repulsive force to the second magnetic attraction member 3, the piston shaft 1 moves linearly downward. Similarly, when the electromagnetic member 4 generates repulsive force to the first magnetic attraction and generates adsorption force to the second magnetic attraction member 3, the piston shaft 1 moves linearly upward, so that the piston rod 1 realizes linear reciprocating motion, and further drives the piston on the piston shaft 1 to reciprocate linearly to generate a pulse water column. The "upper" and "lower" in this embodiment refer to the description according to the position in fig. 1, and do not represent the actual operation state of the water pump.
In other embodiments, the electromagnetic member 4 may be configured to absorb or repel the first magnetic member 2 and the second magnetic member 3 to drive the piston shaft 1 to reciprocate linearly in the axial direction, or may be configured to adjust the relative positions of the electromagnetic member 4 and the first electromagnetic member 2 and the second electromagnetic member 3, so that the electromagnetic member 4 may generate an absorption force only on one of the first magnetic member 2 and the second magnetic member 3, or generate a repulsive force only on one of them to drive the piston shaft 1 to reciprocate linearly.
In a further preferred embodiment, as shown in fig. 2, a step positioning surface 11 is provided on the piston shaft 1, and the first magnetic attraction member 2 is disposed through the piston shaft 1, and one end surface of the first magnetic attraction member abuts against the step positioning surface 11.
Specifically, in order to be convenient for install first magnetism and inhale piece 2, first magnetism is inhaled piece 2 and piston shaft 1 clearance fit, utilizes step locating surface 11 that sets up on piston shaft 1 to inhale piece 2 axial location to prevent that first magnetism from inhaling piece 2 to the piston direction drunkenness along the axial, this kind of locate mode simple structure, easy realization, and with low costs. In this embodiment, the first magnetic attraction member 2 and the second magnetic attraction member 3 are both fixed relative to the piston shaft 1, and both move in synchronization with the piston shaft 1.
The axial positioning of the first magnetic attraction piece 2 is performed along the direction close to the piston, the step positioning surface 11 is used for positioning, the first magnetic attraction piece 2 is positioned far away from the piston direction, preferably, the shaft sleeve assembly further comprises a sleeve 5 sleeved on the piston shaft 1 and synchronously moving with the piston shaft 1, one end of the sleeve 5 is propped against the first magnetic attraction piece 2, and the other end is propped against the second magnetic attraction piece 3. The axial movement of the first magnetic attraction piece 2 is completely limited by one end of the sleeve 5 and the step positioning surface 11, the first magnetic attraction piece 2 is axially positioned by the step positioning surface 11 and the sleeve 5, and the magnetic attraction piece is simple in structure, low in cost, easy to assemble and easy to realize.
Furthermore, the other end of the sleeve 5 limits the play of the second magnetic part 3 in the direction approaching the piston, and for axial limiting of the second magnetic part 3 away from the piston, the sleeve assembly preferably further comprises a stop 7 for resisting axial movement of the second magnetic part 3 along the piston shaft 1, the stop 7 being arranged at the end of the piston shaft 1, i.e. the side of the stop 7 where the second magnetic part 3 is away from the sleeve 5. Specifically, the stopper 7 is a retainer ring for a shaft, and a groove is provided at an end of the piston shaft 1, and the retainer ring for a shaft is installed in the groove. In this embodiment, the step positioning surface 11 of the piston shaft 1, the sliding member 6, the sleeve 5 and the shaft retainer ring are used for limiting in a combined manner, so that the first magnetic attraction member 1 and the second magnetic attraction member 3 are ensured to be fixed at predetermined positions, and the integral structure is simple, easy to realize and low in cost.
Specifically, for ease of assembly, the sleeve 5 is in a clearance fit with the piston shaft 1.
In a further preferred scheme, the shaft sleeve assembly further comprises a sliding piece 6, one ends of the first magnetic attraction piece 2 and the sleeve 5 are sleeved with the sliding piece 6, and the sliding piece 6 limits the axial relative rotation of the first magnetic attraction piece 2 and the sleeve 5, so that the first magnetic attraction piece 2 and the sleeve 5 are ensured to be relatively fixed; the other ends of the second magnetic attraction piece 3 and the sleeve 5 are also sleeved with a sliding piece 6, the sliding piece 6 limits the axial relative rotation of the second magnetic attraction piece 3 and the sleeve 5, and the relative fixation of the second magnetic attraction piece 3 and the sleeve 5 is ensured, namely, the sliding piece 6 limits the relative rotation of the first magnetic attraction piece 2, the second magnetic attraction piece 3 and the sleeve 5.
Preferably, in this embodiment, the structures of the sliding parts 6 sleeved outside the first magnetic attraction part 2 and the second magnetic attraction part 3 are the same, so only the sliding part 6 sleeved outside the first magnetic attraction part 2 is used for illustration, the sliding part 6 is in a stepped cylindrical structure, the sliding part 6 comprises a first part and a second part communicated with the first part, the diameter of the first part is larger than that of the second part, the first part is sleeved on the first magnetic attraction part 2, and the second part is sleeved on one end of the sleeve 5. Preferably, the inner wall of the first portion is in interference fit with the first magnetic attraction member 2, and the inner wall of the second portion is in interference fit with the sleeve 5.
In other embodiments, the first magnetic attraction member 2 and the second magnetic attraction member 3 are both integrally injection molded with the piston shaft 1.
In a further preferred technical scheme, the inner wall of the sliding piece 6 is provided with point ribs 61, and the sliding piece 6 is in interference fit with the first magnetic attraction piece 2 and the second magnetic attraction piece 3 through the point ribs 61. Specifically, in this embodiment, the sliding member 6 is disposed outside the first magnetic member 2, and the point rib 61 disposed on the inner wall of the first portion of the sliding member 6 is in interference fit with the first magnetic member 2, so as to fix the sliding member 6 and the first magnetic member 2 relatively. Similarly, the second magnetic attraction member 3 is assembled in the same manner as the sliding member 6 outside the second magnetic attraction member 3.
In addition, the sliding piece 6 provides guidance for the axial linear reciprocating motion of the piston shaft 1, specifically, the sliding piece 6 in the embodiment is installed in cooperation with other structural components in the water pump, and the sliding piece 6 provides guidance for the synchronous motion of the piston rod 1, and the first magnetic attraction piece 2, the second magnetic attraction piece 3 and the sleeve 5 which are installed on the piston rod 1.
Further specifically, the sliding member 6 in this embodiment is a sliding bearing, which is located outside the first magnetic member 2, and the inner ring of the sliding bearing is in interference fit with one ends of the first magnetic member 2 and the sleeve 5, and the inner ring and the outer ring of the sliding bearing can slide relatively to provide guidance. The same applies to the slide bearing located outside the second magnetic attraction member 3. The sliding bearing is low in cost, easy to assemble and install, and capable of greatly improving the stability of the linear motion of the piston shaft 1, and further prolonging the service life of the shaft sleeve assembly.
Further preferably, in order to make the outer circumferential surfaces of the first magnetic attraction member 2 and the second magnetic attraction member 3 uniformly stressed after the first magnetic attraction member 2 and the sliding member 6 are assembled with the second magnetic attraction member 3 and the sliding member 6, the point ribs 61 are uniformly distributed on the inner wall of the sliding member 6 along the circumferential direction, and as shown in fig. 2, the point ribs 61 protrude from the inner wall of the sliding member 6. The first magnetic attraction piece 2 and the sliding piece 6, and the second magnetic attraction piece 3 and the sliding piece 6 are assembled by interference of the point ribs 61, so that radial movement of the first magnetic attraction piece 2 and the second magnetic attraction piece 3 is prevented.
It is further preferable that, for the above-mentioned sliding member 6 to be interference-fitted with the sleeve 5, as shown in fig. 4, specifically, a tangential surface 62 is provided on the inner hole wall of the sliding member 6, and the tangential surface 62 is interference-fitted with the outer wall of the sleeve 5. The interference assembly of the sliding part 6 and the sleeve 5 is realized by processing the tangential plane 62 on the inner hole wall of the sliding part 6, the processing structure is simple, the assembly is easy, the structure is stable after the assembly, and the cost is low. In particular, the second inner hole wall of the slider 6 is trimmed.
In order to make the assembled sleeve 5 uniformly stressed, the tangential surfaces 62 are preferably uniformly distributed along the circumference of the inner wall of the slider 6.
The embodiment also provides a tooth-flushing device water pump, which comprises the shaft sleeve assembly, and the tooth-flushing device water pump can generate a pulse water column. The water pump of the tooth flushing device is applied to the shaft sleeve assembly, so that the water pump can work stably, an ultrafine high-pressure pulse water column is provided, and the service life of the water pump is prolonged.
The embodiment also provides a tooth-rinsing device, the water pump is applied to the tooth-rinsing device, the service life of the water pump is prolonged, and then the service life of the tooth-rinsing device is prolonged.
Specifically, when the tooth-rinsing device works, the electromagnetic member is electrified with forward current, the first magnetic attraction member 2 is electrified with repulsive force, the second magnetic attraction member 3 is electrified with attractive force, the piston shaft 1 moves upwards under the action of the two forces, the upper part refers to the upper part shown in fig. 1, when the electromagnetic member is electrified with reverse current, the first magnetic attraction member 2 is electrified with attractive force, the second magnetic attraction member 3 is electrified with repulsive force, the piston shaft 1 moves downwards under the action of the two forces, and the lower part refers to the lower part in fig. 1, so that one cycle is completed. The piston mounted on the piston shaft 1 also linearly reciprocates, thereby generating ultra-fine high-pressure pulse water columns, and the ultra-fine high-pressure pulse water columns are sprayed out through the nozzle of the tooth flusher.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (7)
1. A bushing assembly for a water pump, the bushing assembly comprising:
a piston shaft (1) provided inside the water pump;
the first magnetic attraction piece (2) and the second magnetic attraction piece (3), wherein the first magnetic attraction piece (2) and the second magnetic attraction piece (3) are arranged along the axial direction of the piston shaft (1) at a preset distance, and can synchronously move with the piston shaft (1);
the piston shaft (1) is provided with a step positioning surface (11), the first magnetic attraction piece (2) penetrates through the piston shaft (1) and one end surface of the first magnetic attraction piece abuts against the step positioning surface (11), the first magnetic attraction piece is sleeved on the piston shaft (1) and synchronously moves with the piston shaft (1), one end of the first magnetic attraction piece (2) is abutted against the second magnetic attraction piece (3) and the other end of the first magnetic attraction piece is abutted against the second magnetic attraction piece (3), the second magnetic attraction piece (3) is abutted against a stop piece (7) moving along the axial direction of the piston shaft (1), and the stop piece (7) is arranged on one side, far away from the first magnetic attraction piece (3), of the second magnetic attraction piece (3);
the electromagnetic piece (4) is arranged between the first magnetic piece (2) and the second magnetic piece (3), and the electromagnetic piece (4) adsorbs or repels at least one of the first magnetic piece (2) and the second magnetic piece (3) so as to drive the piston shaft (1) to linearly reciprocate along the axial direction;
further comprises:
the sliding piece (6) is sleeved at one end of the first magnetic attraction piece (2) and one end of the sleeve (5), the sliding piece (6) is sleeved at the other end of the second magnetic attraction piece (3) and the other end of the sleeve (5), and the sliding piece (6) limits the relative rotation of the first magnetic attraction piece (2), the second magnetic attraction piece (3) and the sleeve (5);
the slide (6) provides guidance for the axial linear reciprocating movement of the piston shaft (1).
2. The shaft sleeve assembly according to claim 1, wherein a point rib (61) is arranged on the inner wall of the sliding piece (6), and the sliding piece (6) is in interference fit with the first magnetic attraction piece (2) and the second magnetic attraction piece (3) through the point rib (61).
3. A bushing assembly according to claim 1, characterized in that the inner bore wall of the slider (6) is provided with a tangential surface (62), which tangential surface (62) is in interference fit with the outer wall of the sleeve (5).
4. A bushing assembly according to claim 3, characterized in that said tangential surfaces (62) are uniformly distributed along the circumference of the inner wall of said slider (6).
5. Bushing assembly according to claim 1, characterized in that the stop (7) is provided at the end of the piston shaft (1).
6. A dental irrigator pump comprising the bushing assembly of any one of claims 1-5, said dental irrigator pump capable of producing a pulsed water column.
7. A dental irrigator comprising the dental irrigator water pump of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111479603.0A CN114198296B (en) | 2021-12-06 | 2021-12-06 | Shaft sleeve assembly, tooth flushing device water pump and tooth flushing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111479603.0A CN114198296B (en) | 2021-12-06 | 2021-12-06 | Shaft sleeve assembly, tooth flushing device water pump and tooth flushing device |
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| Publication Number | Publication Date |
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| CN114198296A CN114198296A (en) | 2022-03-18 |
| CN114198296B true CN114198296B (en) | 2023-08-25 |
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| CN102400886A (en) * | 2011-11-18 | 2012-04-04 | 安鲁荣 | Double-rotor linear compressor |
| CN103216419A (en) * | 2013-04-17 | 2013-07-24 | 覃瑞昌 | Linear compressor |
| CN206035746U (en) * | 2016-09-27 | 2017-03-22 | 余姚福骏电器有限公司 | Simplify structure electromagnetic water pump |
| CN209827066U (en) * | 2018-09-04 | 2019-12-24 | 郗瑛琦 | Linear actuator and oral cavity cleaner |
| CN112943599A (en) * | 2021-04-16 | 2021-06-11 | 深圳市超微系统科技有限公司 | Water pump of tooth flushing device and tooth flushing device |
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