CN219432119U - Pump head structure - Google Patents

Abstract

The utility model discloses a pump head structure, which comprises a motor shaft driven by a motor and an impeller coaxially connected with the motor shaft; the end part of the motor shaft is provided with a spline part; the impeller comprises a shaft core sleeved on the spline part and blades sleeved on the peripheral surface of the shaft core; the axial line of the shaft core is provided with a spline hole matched with the spline part, the peripheral surface of the shaft core is integrally formed with a plurality of flanges, and the width of each flange gradually increases outwards along the radial direction of the shaft core; the blades are formed on the peripheral surface of the shaft core through a secondary injection molding process and cover the flanges. According to the utility model, the flanges are designed on the peripheral surface of the shaft core of the impeller, the width of each flange gradually increases outwards along the radial direction of the shaft core, so that the peripheral surface of the shaft core is provided with the approximately T-shaped tooth-shaped structure, the flanges can play a role in limiting the blades in the circumferential direction and the radial direction of the shaft core after the blades and the shaft core are subjected to secondary injection molding, the combination of the blades and the shaft core is firmer, the shaft core and the blades are not easy to slip, and the integral strength of the impeller is improved and is more wear-resistant.

Description

Pump head structure

Technical Field

The utility model relates to the technical field of wave-pressing pumps, in particular to a pump head structure of a wave-pressing pump.

Background

The structure of the wave pressing pump comprises a motor, an impeller, a pump head, a pump cover, a sealing ring, a waterproof ring, supporting feet, a rubber pad, a wire harness, a wire clip and the like, and the working principle of the wave pressing pump is as follows: after the whole wave pressing pump is fixed, corresponding pipelines are connected, the motor is electrified, the motor shaft rotates and drives the impeller to rotate, the impeller rotates to generate suction force in the water inlet end and suck liquid, and the liquid flows out of the water outlet end along the flow channel by the rotation of the impeller.

In the prior art, the impeller mainly comprises a shaft core sleeved on a motor shaft and blades fixedly connected to the peripheral surface of the shaft core. Wherein, the axle core is the same with the motor shaft, is copper material generally, and the blade is rubber material generally, through the shaping of rubber coating technology at the surface of axle core, and wherein the drawback that exists is: when the impeller is affected by dry running or long-time working and the like to quickly heat, the friction resistance between the blades and the inner wall of the pump cavity is increased, so that the blades are more easily worn, a slipping phenomenon is generated between the shaft core and the blades, the shaft core cannot drive the torque of the motor shaft to the blades in the same ratio, and the output power of the wave-pressing pump is reduced; in addition, the shaft core made of copper is high in manufacturing cost, and can oxidize after long-time use, so that the service life of the wave pressing pump is influenced.

Disclosure of Invention

The utility model aims to provide a pump head structure which can improve the combination degree between a shaft core and a blade, thereby improving the working stability and the service life of the pump head structure.

In order to achieve the above object, the solution of the present utility model is:

a pump head structure comprises a motor shaft driven by a motor and an impeller coaxially connected with the motor shaft; the end part of the motor shaft is provided with a spline part; the impeller comprises a shaft core sleeved on the spline part and blades sleeved on the peripheral surface of the shaft core; the axial line of the shaft core is provided with a spline hole matched with the spline part, the peripheral surface of the shaft core is integrally formed with a plurality of flanges, and the width of each flange gradually increases outwards along the radial direction of the shaft core; the blades are formed on the peripheral surface of the shaft core through a secondary injection molding process and cover the flanges.

The spline portion is a plane formed in a recessed manner on the peripheral surface of the motor shaft and extending in the axial direction of the motor shaft.

The flanges are disposed at equiangular intervals about the axis of the shaft core.

The junction of the side of flange and the axle core global is provided with the shrinkage part.

Rounded corners are arranged on two sides of the peripheral surface of the flange.

The ends of the blades are provided with cylinders.

The hub is made of PPA-GF50% and the blades are made of TPU.

After the technical scheme is adopted, the utility model has the following technical effects:

through designing a plurality of flanges at the axle core global of impeller, the width of flange is the trend of progressively increasing outwards along the radial of axle core for the global of axle core has approximate T type dentate structure, with blade and axle core secondary injection moulding back flange at the circumference of axle core, radial on both can play the spacing effect to the blade, the combination of both is more firm, is difficult for skidding between axle core and the blade, and impeller holistic intensity obtains promoting, more wear-resisting, and then can promote pump head structural job stabilization nature and life.

Drawings

FIG. 1 is a perspective view of a first embodiment of the present utility model;

FIG. 2 is an exploded view of a first embodiment of the present utility model;

FIG. 3 is an exploded view of an impeller according to a first embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a first embodiment of the present utility model;

FIG. 5 is a perspective view of a second embodiment of the present utility model;

FIG. 6 is an exploded view of a second embodiment of the present utility model;

FIG. 7 is an exploded view of a second embodiment of the impeller of the present utility model;

reference numerals illustrate:

1- - -an electric motor; 11- - -a motor shaft; 111—spline portion;

2- - -an impeller; 21- - -an axial core; 211—spline holes; 212—a flange; 213- -a pinch portion; 214—rounded off;

22- - -leaves; 221—a cylinder;

3- - -a pump body; 31- - -pump head; 311- -a water inlet; 312- -a water outlet; 32- - -pump cover; 33- -sealing ring.

Detailed Description

In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Accordingly, the following detailed description of the embodiments of the utility model, as 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 made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

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 embodiments of the present utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship conventionally put in place when the inventive product is used, or the orientation or positional relationship conventionally understood by those skilled in the art, is merely for convenience in describing the embodiments of the present utility model, and is not intended to indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, 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.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 to 7, the present utility model discloses a pump head structure comprising a motor shaft 11 driven by a motor 1, and an impeller 2 coaxially connected with the motor shaft 11;

the end of the motor shaft 11 is provided with a spline portion 111;

the impeller 2 includes a shaft core 21 fitted over the spline portion 111, and blades 22 fitted over the peripheral surface of the shaft core 21; the axial line of the shaft core 21 is provided with a spline hole 211 matched with the spline part 111, the spline part 111 is inserted into the spline hole 211, the circumferential surface of the shaft core 21 is integrally formed with a plurality of flanges 212, and the width of the flanges 212 gradually increases outwards along the radial direction of the shaft core 21;

the blades 22 are molded on the circumferential surface of the shaft core 21 by a two-shot molding process and cover the flanges 212.

The following illustrates specific embodiments of the utility model.

The spline portion 111 is a plane which is concavely formed on the circumferential surface of the motor shaft 11 and extends along the axial direction of the motor shaft 11, and correspondingly, the spline hole 211 is a counter bore or a through hole with a D-shaped section, and the spline portion 111 and the spline hole 211 are matched in shape, so that the motor shaft 11 can drive the shaft core 21 to synchronously rotate, that is, the same-ratio transmission from the motor shaft 11 to the blades 22 is realized.

The flanges 212 are disposed at equal angular intervals around the axis of the shaft core 21, so that after the blades 22 are formed on the surface of the shaft core 21, the balance of the forces between the shaft core 21 and the blades 22 can be ensured when the blades 22 rotate and are subjected to external resistance.

The connection between the side surface of the flange 212 and the circumferential surface of the shaft core 21 is provided with the shrinkage part 213, so that a relatively obvious gap is formed between the top end of the flange 212 and the circumferential surface of the shaft core 21, and when the blade 22 is secondarily injection-molded on the circumferential surface of the shaft core 21, the material of the blade 22 can be filled in the shrinkage part 213, so that a sufficient limit effect is achieved on the radial movement of the blade 22 relative to the shaft core 21.

The rounded corners 214 are provided on both sides of the peripheral surface of the flange 212, so that the surface of the flange 212 becomes more rounded, the sharp points are reduced, and the contact area with the blade 22 is increased.

The end of the vane 22 is provided with a cylinder 221, and the cylinder 221 has the main function of scraping water, so that the contact tightness between the vane 22 and the inner wall of the pump cavity is increased when the vane rotates, thereby providing enough suction force to pump liquid and increasing the suction distance and flow rate.

The shaft core 21 is made of PPA-GF50% (polyphthalamide and 50% glass fiber), can replace the existing copper or other metal shaft cores, and has lower cost; the blade 22 is made of TPU (thermoplastic polyurethane rubber), which may replace rubber or other materials, and has a longer service life.

Referring to FIGS. 1 to 4, there is shown a 50L wave pump according to a first embodiment of the present utility model; referring to fig. 5 to 7, a 113L wave pump according to a second embodiment of the present utility model is shown. The two are mainly the impeller 2 (i.e. the shaft core 21, the blades 22) with different lengths, which in turn leads to different displacements.

In the first embodiment/the second embodiment, the wave-pressing pump mainly comprises a pump body 3 fixedly connected to the output end of a motor 1, the pump body 3 is composed of a pump head 31 and a pump cover 32, and an impeller 2 is arranged in the pump head 31 and is sealed by the pump cover 32; the pump head 31 is provided with a water inlet 311 and a water outlet 312.

The pump head 31 and the pump cover 32 are made of stainless steel, and have the advantages of high temperature/low temperature resistance, corrosion resistance, abrasion resistance and the like on the premise of ensuring high strength.

The joint between the pump head 31 and the pump cover 32 is sealed by a sealing ring 33, and is locked by a screw to be fixed relatively.

According to the technical scheme, the plurality of flanges 212 are designed on the peripheral surface of the shaft core 21 of the impeller 2, the width of each flange 212 gradually increases outwards along the radial direction of the shaft core 21, so that the peripheral surface of the shaft core 21 has a tooth-shaped structure similar to a T shape, the flanges 212 can play a limiting role on the blades 22 in the circumferential direction and the radial direction of the shaft core 21 after the blades 22 and the shaft core 21 are subjected to secondary injection molding, the combination of the two is firmer, slipping is not easy to occur between the shaft core 21 and the blades 22, the integral strength of the impeller 2 is improved, the impeller is more wear-resistant, and the working stability and the service life of the pump head structure can be improved.

The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.

Claims (7)

1. A pump head structure, characterized in that:

comprises a motor shaft driven by a motor and an impeller coaxially connected with the motor shaft;

the end part of the motor shaft is provided with a spline part;

the impeller comprises a shaft core sleeved on the spline part and blades sleeved on the peripheral surface of the shaft core; the axial line of the shaft core is provided with a spline hole matched with the spline part, the peripheral surface of the shaft core is integrally formed with a plurality of flanges, and the width of each flange gradually increases outwards along the radial direction of the shaft core; the blades are formed on the peripheral surface of the shaft core through a secondary injection molding process and cover the flanges.

2. The pump head structure of claim 1, wherein:

the spline portion is a plane formed in a recessed manner on the peripheral surface of the motor shaft and extending in the axial direction of the motor shaft.

3. The pump head structure of claim 1, wherein:

the flanges are disposed at equiangular intervals about the axis of the shaft core.

4. The pump head structure of claim 1, wherein:

the junction of the side of flange and the axle core global is provided with the shrinkage part.

5. The pump head structure of claim 1, wherein:

rounded corners are arranged on two sides of the peripheral surface of the flange.

6. The pump head structure of claim 1, wherein:

the ends of the blades are provided with cylinders.

7. The pump head structure of claim 1, wherein:

the hub is made of PPA-GF50% and the blades are made of TPU.