Integrated rotor assembly and electronic water pump using same

Abstract

The utility model discloses an integrated rotor assembly and an electronic water pump using the integrated rotor assembly, and relates to the technical field of electronic water pumps and parts of the electronic water pumps, and the integrated rotor assembly comprises a rotor assembly body and a shaft core; the shaft core penetrates through the rotor assembly body in the axial direction and is coaxial with the rotor assembly body, and the shaft core and the rotor assembly body are relatively fixed in the axial direction and the radial direction. The utility model mainly solves the problem of how to enable the shaft core to serve as a transmission part or a power output part of the electronic water pump. The shaft core is relatively fixed to the rotor assembly body in the axial direction and the radial direction, so that the shaft core can rotate along with the rotor assembly body and can serve as a transmission part or a power output part of the electronic water pump, auxiliary power parts are added, the performance of the electronic water pump is improved, and the service life of the electronic water pump is prolonged. The integrated rotor assembly is integrated with the gasket, and a thrust gasket does not need to be arranged on a bearing seat of the electronic water pump.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pumps and parts thereof, in particular to an integrated rotor assembly and an electronic water pump using the same. Background Art

[0002] Electronic water pumps have high output efficiency and can achieve precise flow control. Therefore, electronic water pumps are widely used in household appliances, automobiles and industrial equipment. For example, household appliances such as water-heated mattresses, air conditioners and humidifiers are increasingly equipped with electronic water pumps in order to achieve precise quantitative liquid circulation / discharge functions.

[0003] The rotor assembly is one of the core components of the electronic water pump, which at least includes a rotor bracket, a magnetic ring mounted on the rotor bracket, and an impeller arranged at one end of the rotor bracket. When the stator assembly of the electronic water pump is energized, it can generate a rotating magnetic field. The magnetic ring of the rotor assembly is driven by the magnetic coupling of the rotating magnetic field and can rotate in the rotor cavity of the electronic water pump, thereby driving the rotor bracket and the impeller to rotate together. The rotating impeller can drive the liquid to flow in a directional manner, thereby completing the basic function of the electronic water pump.

[0004] In the prior art, a rotor assembly usually has a graphite or ceramic bearing embedded in a rotor bracket, so that the rotor assembly is suitable for being supported on the shaft core and can rotate around the shaft core.

[0005] However, the electronic water pump of the above structure has a fixed shaft core and cannot output power, and cannot be used as a transmission component or power output component of the electronic water pump, and it is difficult to add auxiliary power components to the electronic water pump.

[0006] In summary, how to make the shaft core of the electronic water pump serve as a transmission component or a power output component of the electronic water pump has become one of the problems to be solved urgently. Utility Model Content

[0007] The utility model aims to provide an integrated rotor assembly and an electronic water pump using the same, wherein the shaft core can be used as a transmission component or a power output component of the electronic water pump.

[0008] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an integrated rotor assembly, comprising a rotor assembly body and an axis core; the axis core passes through the rotor assembly body in an axial direction and is coaxially arranged with the rotor assembly body, and the axis core is relatively fixed to the rotor assembly body in both the axial direction and the radial direction, so that the axis core can rotate with the rotor assembly body.

[0009] In the above technical solution, the rotor assembly body includes a rotor support, a magnetic ring and an impeller; the magnetic ring is sleeved on the rotor support and coaxially arranged with the rotor support, and the impeller is fixed at one end of the rotor support and coaxially arranged with the rotor support; the shaft core passes through the rotor support in the axial direction and is coaxially arranged with the rotor support, and the shaft core is relatively fixed to the rotor support in both the axial direction and the radial direction.

[0010] In the above technical solution, the rotor support forms an inner hole penetrating through itself at its axis along the axial direction, and the inner hole is sequentially arranged as a shaft core fixing section and a avoidance section along the axial direction; the shaft core passes through the inner hole of the rotor support along the axial direction, and the shaft core is relatively fixed to the shaft core fixing section of the inner hole.

[0011] In the above technical solution, a first notch is formed on the side of the shaft core, and a first fixing rib is formed in the inner hole of the rotor bracket in the shaft core fixing section; the first fixing rib of the rotor bracket is inserted into the first notch of the shaft core.

[0012] In the above technical solution, a gasket is embedded in the inner hole of the rotor bracket at the end surface of the avoidance section.

[0013] In the above technical solution, a second notch is formed on the surface of the gasket, and a second fixing rib is formed on the inner hole of the rotor bracket at the end surface of the avoidance section; the second fixing rib of the rotor bracket is inserted into the second notch of the gasket.

[0014] In the above technical solution, a plurality of blades are formed on one side of the impeller; one end of the rotor support extends along its radial direction to form an impeller mounting portion, and the surface of the impeller mounting portion is concave to form a plurality of blade positioning grooves; each blade of the impeller is correspondingly embedded and fixed in each blade positioning groove of the rotor support.

[0015] In the above technical solution, the impeller is formed with a positioning hole at the end surface of the blade, and the rotor support is formed with a positioning column in the blade positioning groove; the positioning column of the rotor support is inserted into the positioning hole of the impeller.

[0016] In the above technical solution, the outer wall of the rotor support is concave inwardly along its radial direction to form a magnetic ring installation groove, and the magnetic ring is sleeved on the magnetic ring installation groove.

[0017] An electronic water pump comprises the above-mentioned integrated rotor assembly.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: the integrated rotor assembly of the utility model and the electronic water pump using the same, the shaft core is relatively fixed to the rotor assembly body in the axial direction and the radial direction, so that the shaft core can rotate with the rotor assembly body; in this way, the shaft core can be used as a transmission component or power output component of the electronic water pump to add auxiliary power components and improve the performance of the electronic water pump. In addition, the integrated rotor assembly of the utility model is integrated with a gasket, and there is no need to set a thrust gasket on the bearing seat of the electronic water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional view of the first embodiment of the present utility model.

[0020] Figure 2 This is an exploded view of the first embodiment of the present invention.

[0021] Figure 3 It is a cross-sectional view of the first embodiment of the present invention.

[0022] The accompanying drawings are marked as follows: 1. rotor bracket; 11. inner hole; 111. shaft core fixing section; 1111. first fixing rib; 112. avoidance section; 1121. second fixing rib; 12. magnetic ring mounting groove; 13. impeller mounting portion; 131. blade positioning groove; 132. positioning column; 2. shaft core; 21. first notch; 3. magnetic ring; 4. impeller; 41. blade; 411. positioning hole; 5. gasket; 51. second notch. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] This embodiment provides an integrated rotor assembly, which can be used in an electronic water pump. Specifically, it can rotate under the drive of a rotating magnetic field to drive the flow of liquid.

[0026] See also Figure 1-Figure 3 The integrated rotor assembly of this embodiment includes a rotor assembly body and a shaft core 2.

[0027] The shaft core 2 is a shaft-shaped workpiece made of metal or ceramic material.

[0028] In order to enable the shaft core 2 to serve as a transmission component or a power output component of the electronic water pump, the shaft core 2 passes through the rotor assembly body in the axial direction and is coaxially arranged with the rotor assembly body, and the shaft core 2 is relatively fixed to the rotor assembly body in both the axial direction and the radial direction, so that the shaft core 2 can rotate with the rotor assembly body.

[0029] Specifically, the rotor assembly body includes a rotor bracket 1, a magnetic ring 3 and an impeller 4; wherein the rotor bracket 1 is a bracket made of engineering plastic material, which is used to provide an overall structural basis for the rotor assembly body; the magnetic ring 3 is an annular body with permanent magnetism, which can be magnetically coupled with the stator assembly of the electronic water pump; the impeller 4 is an engineering plastic workpiece with a plurality of blades 41, and its blades 41 can drive the flow of liquid; the magnetic ring 3 is sleeved on the rotor bracket 1 and is coaxially arranged with the rotor bracket 1, and the impeller 4 is fixed at one end of the rotor bracket 1 and is coaxially arranged with the rotor bracket 1; the shaft core 2 passes through the rotor bracket 1 in the axial direction and is coaxially arranged with the rotor bracket 1, and the shaft core 2 is relatively fixed to the rotor bracket 1 in both the axial direction and the radial direction; in this way, the rotor bracket 1, the magnetic ring 3, the impeller 4 and the shaft core 2 are fixed as a whole, and the rotor bracket 1, the magnetic ring 3, the impeller 4 and the shaft core 2 are all coaxial.

[0030] More specifically, the rotor support 1 has an inner hole 11 formed at its axis along the axial direction that penetrates through it, and the inner hole 11 is sequentially arranged along the axial direction into a shaft core fixing section 111 and a avoidance section 112, wherein the avoidance section 112 is closer to the impeller 4; the shaft core 2 passes through the inner hole 11 of the rotor support 1 along the axial direction, and the shaft core 2 is relatively fixed to the shaft core fixing section 111 of the inner hole 11.

[0031] Furthermore, a first notch 21 is formed on the side of the shaft core 2, and the first notch 21 is formed by machining on the surface of the shaft core 2, or is die-cast integrally with the shaft core 2; the inner hole 11 of the rotor bracket 1 is formed with a first fixing rib 1111 in the shaft core fixing section 111, and the first fixing rib 1111 matches the shape of the first notch 21 of the shaft core 2; the first fixing rib 1111 of the rotor bracket 1 is inserted into the first notch 21 of the shaft core 2, so that the shaft core 2 is relatively fixed to the rotor assembly body in both the axial direction and the radial direction.

[0032] Furthermore, a gasket 5 is embedded in the inner hole 11 of the rotor bracket 1 at the end surface of the avoidance section 112 . The gasket 5 is a circular plate-shaped metal sheet, which is embedded in the end surface of the avoidance section 112 and close to the impeller 4 .

[0033] More specifically, a second notch 51 is formed on the surface of the gasket 5, and the second notch 51 is formed by machining on the surface of the gasket 5, or is die-cast integrally with the gasket 5; the inner hole 11 of the rotor bracket 1 is formed with a second fixing rib 1121 at the end face of the avoidance section 112, and the second fixing rib 1121 matches the shape of the second notch 51 of the gasket 5; the second fixing rib 1121 of the rotor bracket 1 is inserted into the second notch 51 of the gasket 5, and in this way, the gasket 5 can be effectively fixed.

[0034] Specifically, a plurality of blades 41 are formed on one side of the impeller 4, and the blades 41 are a plurality of arc-shaped sheets integrally formed on one side of the impeller 4; one end of the rotor bracket 1 extends along its radial direction to form an impeller mounting portion 13, that is, the diameter of the impeller mounting portion 13 is larger than the main body of the rotor bracket 1, thereby forming a platform for fixing the impeller 4, and the impeller mounting portion 13 is integrally injection-molded with the rotor bracket 1, and the surface of the impeller mounting portion 13 is concave to form a plurality of blade positioning grooves 131, and the blade positioning grooves 131 match the shape of the blades 41 of the impeller 4; each blade 41 of the impeller 4 is correspondingly embedded and fixed in each blade positioning groove 131 of the rotor bracket 1, and in this way, the impeller 4 is fixed to the rotor bracket 1.

[0035] Furthermore, the impeller 4 is formed with a positioning hole 411 at the end surface of the blade 41, and the rotor support 1 is formed with a positioning column 132 in the blade positioning groove 131, and the positioning column 132 matches the shape of the positioning hole 411. The positioning column 132 of the rotor support 1 is inserted into the positioning hole 411 of the impeller 4 so that the impeller 4 is relatively positioned with the rotor support 1 during installation.

[0036] Furthermore, the outer wall of the rotor support 1 is concave inwardly along its radial direction to form a magnetic ring installation groove 12 , and the magnetic ring 3 is sleeved on the magnetic ring installation groove 12 , so that the magnetic ring 3 is flush with the outer wall of the rotor support 1 .

[0037] During the manufacturing of the integrated rotor assembly of the present embodiment, the shaft core 2, the magnetic ring 3, the impeller 4 and the gasket 5 are manufactured in advance, and the shaft core 2, the magnetic ring 3 and the gasket 5 are placed in the mold of the rotor bracket 1. After the plastic is injected into the mold, the main body, the inner hole 11 and the impeller mounting portion 13 of the rotor bracket 1 and other features are formed, and the first fixing rib 1111, the second fixing rib 1121 and the magnetic ring mounting groove 12 and other features are also formed. After demoulding, the rotor bracket 1, the shaft core 2, the magnetic ring 3 and the gasket 5 are formed into one body and relatively fixed; finally, the blades 41 of the impeller 4 are fixed to the impeller mounting portion 13 of the rotor bracket 1 by one of ultrasonic welding, interference fit, screw locking and snap fixing. In the present embodiment, the impeller 4 is fixed to the impeller mounting portion 13 of the rotor bracket 1 by ultrasonic welding, so that the impeller 4 and the rotor bracket 1 are formed into one body and are not easy to fall off.

[0038] Embodiment 2:

[0039] This embodiment provides an electronic water pump, which includes the above-mentioned integrated rotor assembly.

[0040] The above-mentioned integrated rotor assembly has its shaft core 2 supported at both ends in the chamber of the electronic water pump by bearings (or self-lubricating sleeves), so that the rotor bracket 1, shaft core 2, magnetic ring 3, impeller 4 and gasket 5 can rotate in the chamber of the electronic water pump to drive the liquid to flow.

[0041] The avoidance section 112 of the inner hole 11 of the rotor support 1 can allow the bearing seat of the electronic water pump to penetrate therein, and the gasket 5 can prevent the rotor support 1 from directly rubbing against the bearing seat of the electronic water pump.

[0042] The electronic water pump can add auxiliary power components, such as an induced impeller, a small impeller and a spiral impeller, at the end of the shaft core 2, so as to improve the water absorption performance of the electronic water pump at the pump cover, thereby improving the overall performance of the electronic water pump.

[0043] The integrated rotor assembly of the present embodiment and the electronic water pump using the same have a shaft core 2 that is relatively fixed to the rotor assembly body in both the axial direction and the radial direction, so that the shaft core 2 can rotate with the rotor assembly body; in this way, the shaft core 2 can be used as a transmission component or a power output component of the electronic water pump to add auxiliary power components and improve the performance of the electronic water pump. In addition, the integrated rotor assembly of the present embodiment is integrated with a gasket 5, and there is no need to set a thrust gasket 5 on the bearing seat of the electronic water pump.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated rotor assembly, characterized in that: It includes a rotor assembly body and a shaft core; The shaft core passes through the rotor assembly body in the axial direction and is coaxially arranged with the rotor assembly body, and the shaft core is relatively fixed to the rotor assembly body in both the axial direction and the radial direction, so that the shaft core can rotate with the rotor assembly body; The rotor assembly body includes a rotor bracket, a magnetic ring and an impeller; The magnetic ring is sleeved on the rotor bracket and is coaxially arranged with the rotor bracket, and the impeller is fixed at one end of the rotor bracket and is coaxially arranged with the rotor bracket; The shaft core passes through the rotor support in the axial direction and is coaxially arranged with the rotor support, and the shaft core is relatively fixed to the rotor support in both the axial direction and the radial direction; The rotor support forms an inner hole penetrating the rotor support at its axis along the axial direction, and the inner hole is sequentially provided with an axis core fixing section and a avoiding section along the axial direction; The shaft core passes through the inner hole of the rotor support in the axial direction, and the shaft core is relatively fixed to the shaft core fixing section of the inner hole; A first notch is formed on the side surface of the shaft core, and a first fixing rib is formed in the inner hole of the rotor bracket in the shaft core fixing section; The first fixing rib of the rotor support is inserted into the first notch of the shaft core.

2. The integrated rotor assembly according to claim 1, characterized in that: A gasket is embedded in the inner hole of the rotor bracket at the end surface of the avoidance section.

3. The integrated rotor assembly according to claim 2, characterized in that: A second notch is formed on the surface of the gasket, and a second fixing rib is formed on the end surface of the avoidance section in the inner hole of the rotor bracket; The second fixing rib of the rotor support is inserted into the second notch of the gasket.

4. The integrated rotor assembly according to claim 1, characterized in that: A plurality of blades are formed on one side of the impeller; One end of the rotor support extends along its radial direction to form an impeller mounting portion, and the surface of the impeller mounting portion is concave to form a plurality of blade positioning grooves; Each blade of the impeller is correspondingly embedded and fixed in each blade positioning groove of the rotor support.

5. The integrated rotor assembly according to claim 4, characterized in that: The impeller is formed with a positioning hole at the end surface of the blade, and the rotor support is formed with a positioning column in the blade positioning groove; The positioning column of the rotor support is inserted into the positioning hole of the impeller.

6. The integrated rotor assembly according to claim 1, characterized in that: The outer wall of the rotor support is concave inwardly along its radial direction to form a magnetic ring installation groove, and the magnetic ring is sleeved on the magnetic ring installation groove.

7. An electronic water pump, characterized in that: It comprises the integrated rotor assembly described in any one of claims 1-6.

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