Rotor-impeller mechanism with axial thrust structure and electronic water pump applying rotor-impeller mechanism

Abstract

The utility model discloses a rotor-impeller mechanism with an axial thrust structure and an electronic water pump applying the rotor-impeller mechanism, and relates to the technical field of electronic water pumps and parts of the electronic water pumps, the rotor-impeller mechanism comprises a rotor assembly, a rotating shaft component, an impeller functional body and an impeller bushing component, the rotor assembly is coaxially and fixedly connected to the rotating shaft component; the rotating shaft component, the impeller bushing component and the impeller functional body are coaxially and fixedly connected in sequence in the radial direction; the other end face of the impeller bushing member relative to the rotor assembly can be used as an axial thrust structure. The utility model mainly solves the problem of how to provide a rotor-impeller mechanism integrated with a thrust structure for an electronic water pump. The end face of the impeller bush component is used as an axial thrust structure, a thrust washer does not need to be arranged for the electronic water pump, the reuse rate of parts of the electronic water pump is improved, the integration degree and the light weight degree of the electronic water pump are improved, and the material cost and the assembly cost of the electronic water pump are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic water pump and its spare part technical field, concretely is a rotor -impeller mechanism with axial thrust structure and the electronic water pump of applying it. BACKGROUND

[0002] Electronic water pump has higher output efficiency and can realize accurate flow control, therefore, electronic water pump is widely used in car, household appliance and industrial equipment, for example, new energy automobile usually is equipped with two even more electronic water pump, to as the power source of entire cooling system.

[0003] Impeller and rotor assembly are one of the core spare parts of electronic water pump, impeller and rotor assembly usually are rigidly connected through the shaft, electronic water pump runs, is influenced by multiple factors, will make rotor assembly have certain degree of axial displacement, for example, impeller of electronic water pump is influenced by water power when running under rated condition, will produce a force opposite to the direction of water flow, and then through the shaft traction rotor assembly, makes rotor assembly displacement to the direction close to impeller.

[0004] To avoid impeller-rotor assembly assembly excessive displacement, and protect other spare parts of electronic water pump, usually will set up thrust washer at rotor assembly or the chamber of electronic water pump, however, thrust washer itself will occupy certain volume and weight, and the matching structure of thrust washer and other spare parts will also occupy certain volume and weight, obviously is not conducive to the integration, miniaturization and light weight of electronic water pump.

[0005] Summarized above, how to provide rotor-impeller mechanism with integrated thrust structure for electronic water pump becomes one of the problems to be solved. UTILITY MODEL CONTENTS

[0006] The utility model discloses a rotor-impeller mechanism with axial thrust structure and the electronic water pump applying it, and the rotor-impeller mechanism thereof is integrated with axial thrust structure.

[0007] To realize the above-mentioned purpose, the utility model provides the following technical scheme: a rotor-impeller mechanism with axial thrust structure, which comprises a rotor assembly, a shaft member, an impeller functional body and an impeller bushing member; the rotor assembly is fixedly connected coaxially at the shaft member; the shaft member, the impeller bushing member and the impeller functional body are fixedly connected coaxially in turn along the radial direction; the other end surface of the impeller bushing member relative to the rotor assembly can be used as an axial thrust structure.

[0008] The impeller sleeve component comprises at least a sleeve part; the sleeve part of the impeller sleeve component is coaxially fixed to the shaft component; and the impeller functional body is coaxially fixed to the sleeve part of the impeller sleeve component.

[0009] The impeller sleeve component extends in a radial direction relative to the other end surface of the rotor assembly, and forms a flange part connected to the sleeve part; and the flange part of the impeller sleeve component can be used as an axial thrust structure.

[0010] The shaft component is configured as a stepped end part; the end surface and the root part of the stepped end part of the shaft component can also be used as an axial thrust structure.

[0011] The impeller functional body comprises a connecting cylinder part and an impeller body part arranged in sequence in an axial direction; the connecting cylinder part of the impeller functional body is coaxially fixed to the impeller sleeve component.

[0012] The impeller body part of the impeller functional body comprises an impeller platform, a plurality of blades, and an impeller cover arranged in sequence in an axial direction; and the impeller platform of the impeller body part is connected to the connecting cylinder part.

[0013] The impeller functional body is integrally fixed to the impeller sleeve component by plastic molding.

[0014] The rotor assembly comprises at least a rotor core component and a plurality of permanent magnets; the rotor core component is provided with a plurality of permanent magnet insertion slots; the permanent magnets are inserted into the permanent magnet insertion slots of the rotor core component according to their polarities; and the rotor core component of the rotor assembly is coaxially fixed to the shaft component.

[0015] The rotor assembly further comprises a rotor sleeve component and a rotor end cover component; the rotor sleeve component is sleeved on the surface of the rotor core component, and the rotor end cover component covers the opening of the rotor sleeve component.

[0016] An electronic water pump comprises the rotor-impeller mechanism with an axial thrust structure described above.

[0017] Compared with the prior art, the rotor-impeller mechanism with the axial thrust structure and the electronic water pump applying the same have the beneficial effects that: the shaft member, the impeller bushing member and the impeller functional body are coaxially fixedly connected in sequence along the radial direction, and the other end surface of the impeller bushing member relative to the rotor assembly can be used as the axial thrust structure; by arranging the impeller bushing member, on one hand, the impeller functional body is provided with a mounting and fixing structure, and on the other hand, the end surface of the impeller bushing member is used as the axial thrust structure, so that rigid collision or direct contact / friction between the relatively fragile impeller functional body and the rotor assembly and other parts of the electronic water pump is effectively avoided, the impeller functional body and the rotor assembly are effectively protected, the stability and service life of the electronic water pump are improved, the electronic water pump does not need to be provided with a thrust washer, the reuse rate of parts of the electronic water pump is improved, and the integration degree, the integration degree and the light weight degree of the electronic water pump are improved, and the material cost and the assembly cost of the electronic water pump are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective view of the utility model.

[0019] Figure 2 It is an exploded view of the utility model.

[0020] Figure 3 It is a sectional view of the utility model.

[0021] The figure mark is: 1, rotor assembly; 11, rotor core member; 111, permanent magnet slot; 12, permanent magnet; 13, rotor sleeve member; 14, rotor end cover member; 2, shaft member; 21, stepped end; 3, impeller functional body; 31, connecting barrel part; 32, impeller body part; 321, impeller platform; 322, blade; 323, impeller cover; 4, impeller bushing member; 41, sleeve part; 411, rotation stop structure; 42, flange part. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] The embodiment provides a rotor-impeller mechanism with an axial thrust structure, which is applied in an electronic water pump and can rotate under the driving of a rotating magnetic field generated by a stator assembly of the electronic water pump to drive liquid medium to flow.

[0024] Please refer toFigures 1-3 The rotor-impeller mechanism with axial thrust structure of the present embodiment comprises a rotor assembly 1, a rotating shaft member 2, an impeller functional body 3, and an impeller bushing member 4.

[0025] The rotating shaft member 2 is an integrally formed metal shaft member with a substantially cylindrical outer profile.

[0026] The impeller bushing member 4 is an integrally formed metal sleeve member with a substantially sleeve-shaped outer profile.

[0027] The rotor assembly 1 is coaxially fixedly connected to the rotating shaft member 2, so that the rotor assembly 1 and the rotating shaft member 2 rotate coaxially.

[0028] The rotating shaft member 2, the impeller bushing member 4, and the impeller functional body 3 are coaxially fixedly connected in sequence along the radial direction, so that the impeller bushing member 4 and the impeller functional body 3 also rotate coaxially with the rotating shaft member 2.

[0029] The other end surface of the impeller bushing member 4 relative to the rotor assembly 1 can be used as an axial thrust structure.

[0030] Specifically, the impeller bushing member 4 at least comprises a sleeve portion 41 with a substantially sleeve-shaped outer profile; the sleeve portion 41 of the impeller bushing member 4 is coaxially fixedly sleeved at the rotating shaft member 2, and the impeller functional body 3 is coaxially fixedly sleeved at the sleeve portion 41 of the impeller bushing member 4, in this way, the rotating shaft member 2, the impeller bushing member 4, and the impeller functional body 3 are coaxially fixedly connected in sequence along the radial direction.

[0031] Further, the other end surface of the impeller bushing member 4 relative to the rotor assembly 1 extends along the radial direction to form a flange portion 42 connected to the sleeve portion 41, specifically, the flange portion 42 and the sleeve portion 41 are an integrally formed structure, the impeller bushing member 4 can be obtained by machining or integrally die casting, the flange portion 42 has a larger outer diameter than the sleeve portion 41; please refer to Figure 3 The flange portion 42 of the impeller bushing member 4 can be used as an axial thrust structure.

[0032] Further, at least one end of the rotating shaft member 2 is configured as a stepped end portion 21, specifically, the stepped end portion 21 and the body of the rotating shaft member 2 are an integrally formed structure, the rotating shaft member 2 can be obtained by machining or integrally die casting, the stepped end portion 21 has a smaller outer diameter than the body of the rotating shaft member 2; please refer to Figure 3 The end surface and the root portion of the stepped end portion 21 of the rotating shaft member 2 can also be used as an axial thrust structure.

[0033] Specifically, the impeller functional body 3 comprises a connecting cylinder portion 31 and an impeller body portion 32 arranged in sequence along the axial direction, and the impeller functional body 3 is actually an integrally injection molded structure, that is, the connecting cylinder portion 31 and the impeller body portion 32 are an integrally injection molded structure, wherein the outer contour of the connecting cylinder portion 31 is substantially sleeve-shaped, and the outer contour of the impeller body portion 32 is substantially wheel-shaped; the connecting cylinder portion 31 of the impeller functional body 3 is fixedly connected at the impeller bushing member 4 in a coaxial manner.

[0034] Further specifically, the impeller body portion 32 of the impeller functional body 3 comprises an impeller platform 321, a plurality of blades 322, and an impeller cover 323 arranged in sequence along the axial direction; wherein the impeller platform 321 is a circular plate, the blades 322 are sheet-shaped bodies with a certain curvature, and the impeller cover 323 is a cover; the impeller platform 321, the blades 322, and the impeller cover 323 are an integrally injection molded structure; the impeller platform 321 of the impeller body portion 32 is connected with the connecting cylinder portion 31.

[0035] Further, the impeller functional body 3 is fixedly integrated with the impeller bushing member 4 in a plastic encapsulation manner, that is, the impeller bushing member 4 is placed into a molding mold of the impeller functional body 3, plastic material is injected into the molding mold, and after the plastic material cools and solidifies, the connecting cylinder portion 31 and the impeller body portion 32 of the impeller functional body 3 are obtained, wherein the connecting cylinder portion 31 of the impeller functional body 3 is fixedly integrated with the impeller bushing member 4; with this structure, the integration degree and the integration degree of the rotor-impeller mechanism with the axial thrust structure of the present embodiment can be improved.

[0036] Further, the outer surface of the impeller bushing member 4 is provided with a rotation stop structure to avoid relative rotation between the impeller bushing member 4 and the impeller functional body 3; in the present embodiment, the rotation stop structure is knurling arranged on the outer surface of the impeller bushing member 4; in other embodiments, the rotation stop structure can also be a key structure or a special-shaped structure arranged on the outer surface of the impeller bushing member 4.

[0037] Further, the rotor assembly 1 at least comprises a rotor core member 11 and a plurality of permanent magnets 12, wherein the rotor core member 11 is a solid structure body stacked by a plurality of silicon steel sheets, and the permanent magnet 12 is a sheet-shaped body (also known as "magnetic sheet" or "magnetic tile") with permanent magnetism; a plurality of permanent magnet insertion slots 111 are formed at the rotor core member 11, and the permanent magnet insertion slots 111 are shape-matched with the permanent magnets 12; the permanent magnets 12 are correspondingly inserted into the permanent magnet insertion slots 111 of the rotor core member 11 according to the polarity, and the two can be fixed by adhesive; the rotor core member 11 of the rotor assembly 1 is fixedly connected at the rotating shaft member 2 in a coaxial manner.

[0038] Further, the rotor assembly 1 further comprises a rotor sleeve member 13 and a rotor end cover member 14; the rotor sleeve member 13 is a sleeve-shaped member made of metal, and the rotor end cover member 14 is a cover-shaped member made of metal; the rotor sleeve member 13 is sleeved on the surface of the rotor core member 11, and the rotor end cover member 14 is covered on the opening of the rotor sleeve member 13.

[0039] It should be noted that, in the manufacturing of the rotor assembly 1, the pieces of permanent magnets 12 are inserted into the permanent magnet insertion slots 111 of the rotor core member 11 according to the polarity, then the rotor sleeve member 13 is sleeved on the surface of the rotor core member 11, and the rotor end cover member 14 is covered on the opening of the rotor sleeve member 13, finally, the rotor core member 11, the rotor sleeve member 13 and the rotor end cover member 14 are welded and fixed into one body by laser welding, thereby obtaining the rotor assembly 1.

[0040] It should be noted that, in the manufacturing of the rotor-impeller mechanism with axial thrust structure of the present embodiment, the combination of the rotor assembly 1 is pre-prepared, and the combination of the impeller functional body 3 and the impeller sleeve member 4 is also pre-prepared; then, the combination of the rotor assembly 1 and the combination of the impeller functional body 3 and the impeller sleeve member 4 are sleeved on the predetermined positions of the shaft member 2, thereby obtaining the rotor-impeller mechanism with axial thrust structure of the present embodiment; the combination of the rotor assembly 1 can be fixed by laser welding or interference fit, and the combination of the impeller functional body 3 and the impeller sleeve member 4 can also be fixed by laser welding or interference fit.

[0041] It should be noted that, in the manufacturing of the rotor-impeller mechanism with axial thrust structure of the present embodiment, the combination of the rotor assembly 1 is pre-prepared, and the combination of the impeller functional body 3 and the impeller sleeve member 4 is also pre-prepared; then, the combination of the rotor assembly 1 and the combination of the impeller functional body 3 and the impeller sleeve member 4 are sleeved on the predetermined positions of the shaft member 2, thereby obtaining the rotor-impeller mechanism with axial thrust structure of the present embodiment; the combination of the rotor assembly 1 can be fixed by laser welding or interference fit, and the combination of the impeller functional body 3 and the impeller sleeve member 4 can also be fixed by laser welding or interference fit. Figure 3 In the rotor-impeller mechanism with axial thrust structure of the present embodiment, at one end thereof, the flange portion 42 of the impeller sleeve member 4, the end face of the stepped end portion 21 of the shaft member 2, and the root portion of the stepped end portion 21 of the shaft member 2 are configured, and there are three axial thrust structures; at the other end thereof, the end face of the stepped end portion 21 of the shaft member 2 and the root portion of the stepped end portion 21 of the shaft member 2 are configured, and there are two axial thrust structures; thus, the relatively fragile impeller functional body 3 and rotor assembly 1 can be effectively prevented from being rigidly collided or directly contacted / rubbed with other components of the electronic water pump, thereby effectively protecting the impeller functional body 3 and the rotor assembly 1 and improving the stability and service life of the electronic water pump.

[0042] The present embodiment further provides an electronic water pump comprising the rotor-impeller mechanism with axial thrust structure as described above.

[0043] The rotor-impeller mechanism with axial thrust structure and the electronic water pump using the same of the embodiment, the rotating shaft component 2, the impeller bushing component 4 and the impeller functional body 3 are coaxially fixedly connected in sequence along the radial direction, the other end surface of the impeller bushing component 4 relative to the rotor assembly 1 can be used as the axial thrust structure; by configuring the impeller bushing component 4, on the one hand, the impeller functional body 3 is provided with the mounting and fixing structure, on the other hand, the end surface of the impeller bushing component 4 is used as the axial thrust structure, effectively avoiding the rigid collision or direct contact / friction between the relatively fragile impeller functional body 3 and the rotor assembly 1 and other parts of the electronic water pump, effectively protecting the impeller functional body 3 and the rotor assembly 1, improving the stability and service life of the electronic water pump, the embodiment does not need to configure the thrust washer for the electronic water pump, improves the part reuse rate of the electronic water pump, and improves the integration degree, the integration degree and the light weight degree of the electronic water pump, and reduces the material cost and the assembly cost of the electronic water pump.

[0044] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A rotor-impeller mechanism having an axial thrust structure, characterized by, The rotor-impeller mechanism comprises a rotor assembly, a rotating shaft member, an impeller functional body and an impeller sleeve member. The rotor assembly is coaxially fixedly connected to the rotating shaft member. The rotating shaft member, the impeller sleeve member and the impeller functional body are coaxially fixedly connected in sequence along the radial direction. The other end surface of the impeller sleeve member relative to the rotor assembly can be used as an axial thrust structure.

2. The rotor-impeller mechanism having an axial thrust structure according to claim 1, characterized by The impeller sleeve member comprises a sleeve portion. The sleeve portion of the impeller sleeve member is coaxially fixedly sleeved to the rotating shaft member. The impeller functional body is coaxially fixedly sleeved to the sleeve portion of the impeller sleeve member.

3. The rotor-impeller mechanism having an axial thrust structure according to claim 2, characterized by The other end surface of the impeller sleeve member relative to the rotor assembly extends along the radial direction to form a flange portion connected to the sleeve portion. The flange portion of the impeller sleeve member can be used as an axial thrust structure.

4. The rotor-impeller mechanism having an axial thrust structure according to any one of claims 1 to 3, characterized by At least one end of the rotating shaft member is configured as a stepped end. The stepped end of the rotating shaft member can also be used as an axial thrust structure.

5. The rotor-impeller mechanism having an axial thrust structure according to any one of claims 1 to 3, characterized by The impeller functional body comprises a connecting cylinder portion and an impeller body portion arranged in sequence along the axial direction. The connecting cylinder portion of the impeller functional body is coaxially fixedly connected to the impeller sleeve member.

6. The rotor-impeller mechanism having an axial thrust structure according to claim 5, characterized by The impeller body portion of the impeller functional body comprises an impeller platform, a plurality of blades and an impeller cover arranged in sequence along the axial direction. The impeller platform of the impeller body portion is connected to the connecting cylinder portion.

7. The rotor-impeller mechanism having an axial thrust structure according to claim 6, characterized by The impeller functional body is integrally fixed to the impeller sleeve member by plastic encapsulation.

8. The rotor-impeller mechanism having an axial thrust structure according to any one of claims 1 to 3, characterized by The rotor assembly comprises a rotor core member and a plurality of permanent magnets. A plurality of permanent magnet insertion slots are formed in the rotor core member. The permanent magnets are inserted into the permanent magnet insertion slots of the rotor core member according to their polarity. The rotor core member of the rotor assembly is coaxially fixedly connected to the rotating shaft member.

9. The rotor-impeller mechanism having an axial thrust structure according to claim 7, characterized by The rotor assembly further comprises a rotor sleeve member and a rotor end cover member. The rotor sleeve member is sleeved to the surface of the rotor core member, and the rotor end cover member covers the opening of the rotor sleeve member.

10. An electronic water pump characterized by comprising: The rotor-impeller mechanism with an axial thrust structure according to any one of claims 1-9.

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