CN216652522U

CN216652522U - Piston pump and tooth flushing device

Info

Publication number: CN216652522U
Application number: CN202123042273.7U
Authority: CN
Inventors: 韩元平; 欧阳兆胜
Original assignee: Kada Micromotor Manufacturing Co ltd; Hefei Xinhu Canned Motor Pump Co Ltd
Current assignee: Kada Micromotor Manufacturing Co ltd; Hefei Xinhu Canned Motor Pump Co Ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-06-03
Anticipated expiration: 2031-12-06

Abstract

The utility model belongs to the technical field of pumps, and discloses a piston pump and a tooth flushing device, wherein the piston pump comprises: the piston cylinder is provided with a piston cavity, a water inlet and a water outlet which are communicated with the piston cavity; the piston is arranged in the piston cavity, a spherical cavity core rod is arranged on the piston, a ball head positioned in the spherical cavity is arranged at one end of the piston, and a coil is wound on the core rod; and the magnetic pole is arranged around the core rod, a through hole for the core rod to extend into is formed in the magnetic pole, and when the coil is electrified, the core rod can linearly move relative to the magnetic pole along the axial direction of the core rod. The core rod is driven to move linearly by the electromagnetic force between the magnetic pole and the electrified coil, so that the core rod drives the piston to move in the piston cavity, and the mechanical friction and abrasion between the core rod and the cam are avoided; and the core rod is connected with the piston through the ball head, so that the degree of freedom is high, the piston can be uniformly stressed, the abrasion of the piston is reduced, and the service life of the piston is prolonged.

Description

Piston pump and tooth flushing device

Technical Field

The utility model belongs to the technical field of pumps, and particularly relates to a piston pump and a tooth flushing device.

Background

The tooth flushing device is used as a novel oral cavity cleaning appliance and is widely applied. The tooth flusher pressurizes water through the pump body, can generate superfine high-pressure pulse water columns, can enable the high-pressure pulse water columns to wash any parts of the oral cavity without obstacles through the nozzle, can effectively clean dental plaque on the surfaces of teeth, keeps the oral cavity clean, and enables people to feel fresh.

The piston pump of the tooth flusher is an important part in the tooth flusher. At present, a piston pump of the tooth flushing device mostly adopts a cam to drive a piston pull rod so as to drive a piston to move in a piston cavity, but the movement of the piston pull rod is easy to deviate and cannot keep linear movement, so that the piston is not uniformly stressed, the abrasion of the piston is increased, and the service lives of the piston pump and the tooth flushing device are influenced.

Therefore, a piston pump and a tooth irrigator are needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a piston pump to solve the problems that the piston in the prior art is stressed unevenly, the abrasion of the piston is added, and the service lives of the piston pump and a tooth flusher are influenced

To achieve the above object, the present application provides a piston pump comprising:

the piston cylinder is provided with a piston cavity, a water inlet and a water outlet which are communicated with the piston cavity;

a piston arranged in the piston cavity and provided with a spherical cavity

One end of the core rod is provided with a ball head positioned in the spherical cavity, and a coil is wound on the core rod;

and the magnetic pole is arranged around the core bar, and when the coil is electrified, the core bar can move linearly along the axial direction of the core bar relative to the magnetic pole.

As a preferable technical solution of the piston pump, the piston pump further includes a first elastic member, the first elastic member is sleeved on the core bar, and one end of the first elastic member abuts against the magnetic pole, and the other end of the first elastic member abuts against a first limiting surface of the core bar.

As a preferred technical scheme of the piston pump, the piston pump further comprises a second elastic piece, the second elastic piece is sleeved on the piston cylinder, one end of the second elastic piece abuts against the limiting bulge of the piston cylinder, and the other end of the second elastic piece abuts against the second limiting surface of the core rod.

As a preferred technical scheme of the piston pump, the magnetic pole comprises an armature and a ring magnet, the armature is arranged around the core rod and is provided with a through hole for the core rod to extend into, and the ring magnet is connected to the armature.

As a preferable technical solution of the piston pump, the piston pump further includes a housing, the housing is connected to the piston cylinder, and the magnetic pole is disposed in the housing.

As a preferred technical solution of the piston pump, the armature is in interference fit with the housing.

As a preferred technical scheme of the piston pump, an annular hole is formed in the core rod, the magnetic pole is provided with a protrusion, the protrusion is provided with the through hole, and the protrusion is located in the annular hole.

As a preferable technical scheme of the piston pump, an annular groove is formed in the periphery of the core rod, and the coil is arranged in the annular groove.

The application also provides a tooth flushing device which comprises the piston pump in any scheme.

Compared with the prior art, the utility model has the following beneficial effects:

according to the piston pump, the core rod is driven to move linearly by the electromagnetic force between the magnetic pole and the electrified coil, so that the core rod drives the piston to move in the piston cavity, and the mechanical friction and abrasion between the core rod and the cam are avoided; and the core rod is connected with the piston ball head, so that the degree of freedom is high, the piston can be uniformly stressed, the abrasion of the piston is reduced, and the service life of the piston is prolonged.

Drawings

Fig. 1 is a schematic cross-sectional view of a piston pump according to the first embodiment;

FIG. 2 is a first schematic sectional view of the piston pump provided in this embodiment;

fig. 3 is a schematic cross-sectional view of the piston and the core rod provided in this embodiment.

Wherein:

1. a piston cylinder; 11. a piston cavity; 12. a water inlet; 13. a water outlet; 2. a piston; 21. an annular groove; 3. a core bar; 31. a ball head; 32. a stem; 301. a first limiting surface; 302. A second limiting surface; 303. an annular aperture; 4. a coil; 5. a magnetic pole; 51. an armature; 511. perforating holes; 52. a ring magnet; 6. a first elastic member; 7. a second elastic member; 8. a housing; 9. An annular seal ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of 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 present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1 to 3, the present embodiment provides a piston pump including a piston cylinder 1, a piston 2, a core bar 3, a coil 4, and a magnetic pole 5. Wherein, the piston cylinder 1 is provided with a piston cavity 11 and a water inlet 12 and a water outlet 13 which are communicated with the piston cavity 11. Piston 2 sets up in piston chamber 11, has seted up spherical chamber on the piston 2. One end of the core rod 3 is provided with a ball head 31 positioned in the spherical cavity, and the coil 4 is wound on the core rod 31. The magnetic pole 5 is arranged around the core rod 3, and the core rod 3 can move linearly in its axial direction relative to the magnetic pole 5 when the coil 4 is energized.

Compared with the prior art, the core rod 3 is driven to move linearly by the electromagnetic force between the magnetic pole 5 and the electrified coil 4, so that the core rod 3 drives the piston 2 to move in the piston cavity 11, and the mechanical friction and abrasion between the core rod and the cam are avoided; and core bar 3 and piston 2 pass through bulb 31 and connect, and the degree of freedom is great, can guarantee that piston 2 atress is even, reduces the wearing and tearing of piston 2, improves the life of piston 2. It is also possible to avoid the piston 2 from jamming during operation.

Specifically, the magnetic pole 5 generates a magnetic field, when the coil 4 is energized, the coil 4 cuts the magnetic field of the magnetic pole 5, so as to generate an electromagnetic force along the axial direction of the core rod 3, so that the core rod 3 moves, and when the current direction in the coil 4 is not changed in a section, the core rod 3 reciprocates, so as to drive the piston 2 to realize water absorption and drainage. For example, in the present embodiment, when a positive current is applied to the coil 4, the core rod 3 drives the plunger 2 to move toward the magnetic pole 5, so as to suck water into the plunger cavity 11, and the final state is shown in fig. 2. When negative current is conducted in the coil 4, the core rod 3 drives the piston 2 to move in a direction away from the magnetic pole 5, so that water is discharged out of the piston cavity 11, and the final state is shown in fig. 1.

It should be noted that a one-way valve is arranged in the water inlet 12, and when water is sucked, the water enters the piston cavity 11 through the water inlet 12 and the one-way valve. When water is drained, water in the piston cavity 11 is drained through the water outlet 13.

Further, in order to improve the sealing performance between the piston 2 and the wall surface of the piston cavity 11, an annular groove 21 is formed in the piston 2, and an annular sealing ring 9 is arranged in the annular groove 21. The annular sealing ring 9 is tightly attached to the wall surface of the piston cavity 11, so that the sealing effect is improved.

Referring to fig. 1 to 3, the piston pump further includes a first elastic member 6, the first elastic member 6 is sleeved on the core rod 3, and one end of the first elastic member abuts against the magnetic pole 5, and the other end of the first elastic member abuts against the first limiting surface 301 of the core rod 3.

Specifically, the core rod 3 is provided with an annular hole 303, the magnetic pole 5 is provided with a protrusion, the protrusion is provided with a through hole 511, and the protrusion is located in the annular hole 303. The first elastic element 6 is also sleeved on the protrusion. It will be appreciated that the stem 32 formed by the annular bore 303 formed in the core rod 3 extends into the bore 511. Through setting up first elastic component 6, can produce the buffering to the removal of core bar 3, avoid core bar 3 and magnetic pole 5 to produce the rigid collision. The first elastic member 6 is preferably a spring.

Furthermore, a third limiting surface is arranged on the protrusion, the third limiting surface is matched with the first limiting surface 301 to limit the core rod 3, and the movement of the core rod 3 can be limited in the same way.

Furthermore, an annular groove is formed in the periphery of the core rod 3, and the coil 4 is arranged in the annular groove.

Referring to fig. 1 to 3 again, the piston pump further includes a second elastic member 7, the second elastic member 7 is sleeved on the piston cylinder 1, and one end of the second elastic member abuts against the limiting protrusion on the piston cylinder 1, and the other end abuts against the second limiting surface 302 of the core rod 3. By providing the second elastic element 7, the movement of the core rod 3 can also be damped, i.e. the core rod 3 is damped at both ends of the core rod 3 in cooperation with the first elastic element 6. The second retaining member 7 is preferably a spring.

As shown in fig. 1 and 2, the magnetic pole 5 includes an armature 51 and a ring magnet 52, the armature 51 is disposed around the core rod 3 and is provided with a through hole 511 into which the core rod 3 extends, and the ring magnet 52 is connected to the armature 51. That is, the armature 51 has the above-described projection. Specifically, the ring magnet 52 is interference-fitted with the armature 51. The magnet 52 magnetizes the armature 51 and forms a magnetic pole 5 together with the armature 51, thereby forming a magnetic field.

Further, the piston pump also comprises a shell 8, the shell 8 is connected with the piston cylinder 1, and the magnetic pole 5 is arranged in the shell 8. Specifically, in the present embodiment, the magnetic pole 5 is interference-fitted with the housing 8. Of course, in other embodiments, other mounting means, such as welding, bolting, etc., may be used.

Further, in the present embodiment, the piston cylinder 1 is interference-fitted with the housing 8. Of course, in other embodiments, other mounting means, such as welding, bolting, etc., may be used.

The embodiment also provides a tooth flushing device which comprises the piston pump.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A piston pump, comprising:

the piston cylinder (1) is provided with a piston cavity (11) and a water inlet (12) and a water outlet (13) which are communicated with the piston cavity (11);

the piston (2) is arranged in the piston cavity (11), and a spherical cavity is formed in the piston (2);

one end of the core rod (3) is provided with a ball head (31) positioned in the spherical cavity, and a coil (4) is wound on the core rod (3);

and the magnetic pole (5) is arranged around the core rod (3), and when the coil (4) is electrified, the core rod (3) can move linearly along the axial direction relative to the magnetic pole (5).

2. The piston pump according to claim 1, further comprising a first elastic member (6), wherein the first elastic member (6) is sleeved on the core rod (3), and one end of the first elastic member abuts against the magnetic pole (5) and the other end of the first elastic member abuts against a first limiting surface (301) of the core rod (3).

3. The piston pump according to claim 1, further comprising a second elastic member (7), wherein the second elastic member (7) is sleeved on the piston cylinder (1), and one end of the second elastic member abuts against a limiting protrusion of the piston cylinder (1) and the other end abuts against a second limiting surface (302) of the core rod (3).

4. Piston pump according to claim 1, characterised in that the magnetic pole (5) comprises an armature (51) and a ring magnet (52), the armature (51) being arranged around the core rod (3) and being provided with a through-opening (511) into which the core rod (3) extends, the ring magnet (52) being connected to the armature (51).

5. A piston pump according to claim 4, further comprising a housing (8), the housing (8) being connected to the piston cylinder (1), the magnet pole (5) being arranged in the housing (8).

6. Piston pump according to claim 5, characterised in that the armature (51) has an interference fit with the housing (8).

7. Piston pump according to claim 4, characterised in that the core rod (3) is provided with an annular hole (303), the magnetic pole (5) is provided with a projection, the projection is provided with the through hole (511), and the projection is positioned in the annular hole (303).

8. Piston pump according to claim 1, characterized in that an annular groove is provided on the outer circumference of the core rod (3), in which annular groove the coil (4) is arranged.

9. Piston pump according to claim 1, characterized in that an annular groove (21) is provided in the piston (2), and an annular sealing ring (9) is provided in the annular groove (21).

10. A dental irrigator comprising a piston pump according to any one of claims 1 to 9.