Impeller rotor assembly and water pump

Abstract

The utility model belongs to the technical field of water pumps, and discloses an impeller rotor assembly and a water pump, the impeller rotor assembly comprises an impeller handle, an impeller body, a magnet and a stainless steel sleeve, the impeller handle is provided with a through hole, and the peripheral wall of the first end of the impeller handle is convexly provided with a first convex part and a second convex part; the first protruding part, the second protruding part and the peripheral wall of the impeller handle jointly form a containing groove, the first protruding part is provided with a first fixing groove, the second protruding part is provided with a second fixing groove, the impeller body is arranged at the second end of the impeller handle, the impeller body and the impeller handle are coaxially arranged, and the magnet is fixed in the containing groove. The stainless steel sleeve sleeves the outer side of the impeller handle and is attached to the magnet, and the two ends of the stainless steel sleeve are inserted into the first fixing groove and the second fixing groove respectively; the water pump comprises a rotor shaft and the impeller rotor assembly, and the rotor shaft penetrates through the through hole. The impeller rotor assembly can effectively restrain overall heating expansion deformation of the impeller rotor assembly, meanwhile, air gaps are prevented from being too small, and effective work of a water pump is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, and in particular to an impeller rotor assembly and a water pump. Background Technology

[0002] Currently, most impeller rotor assemblies for electronic water pumps are manufactured using injection molding. However, the high temperature and pressure of injection molding make plastic structures prone to deformation and cracking, resulting in a high scrap rate. Furthermore, to ensure reliable and stable installation of the internal magnets and prevent overall thermal expansion and deformation of the impeller rotor assembly, the portion of the plastic structure encasing the magnets must have a certain thickness, generally not less than 0.7mm. This relatively thick injection-molded wall increases the air gap when the impeller rotor assembly is assembled onto the water pump, affecting its efficiency. It also increases the overall size of the impeller rotor assembly, increases plastic consumption, and can lead to insufficient air gap due to thermal expansion and deformation, further impacting the pump's performance. Utility Model Content

[0003] The purpose of this utility model is to provide an impeller rotor assembly and a water pump, which has a simple structure, is reliable and stable, can reduce the overall size, and can effectively suppress the overall thermal expansion and deformation of the impeller rotor assembly while avoiding excessively small air gaps, thus ensuring the effective operation of the water pump.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] An impeller rotor assembly includes:

[0006] The impeller handle has a through hole along its own axial direction for the rotor shaft to pass through. The outer peripheral wall of the first end of the impeller handle has a first protrusion and a second protrusion. The first protrusion and the second protrusion are spaced apart. The first protrusion, the second protrusion and the outer peripheral wall of the impeller handle together form a receiving groove. The first protrusion has a first fixing groove and the second protrusion has a second fixing groove.

[0007] An impeller body is disposed at the second end of the impeller handle, and the impeller body and the impeller handle are arranged coaxially;

[0008] The magnet is fixedly disposed within the receiving groove;

[0009] A stainless steel sleeve is fitted onto the outside of the impeller handle. The stainless steel sleeve is in contact with the magnet. The first end of the stainless steel sleeve is fixedly inserted into the first fixing groove, and the second end of the stainless steel sleeve is fixedly inserted into the second fixing groove.

[0010] Preferably, the first end of the stainless steel sleeve is bent toward the first protrusion and provided with a first fixing head, and the second end of the stainless steel sleeve is bent toward the second protrusion and provided with a second fixing head. The first fixing head is fixedly inserted into the first fixing groove, and the second fixing head is fixedly inserted into the second fixing groove.

[0011] Preferably, the stainless steel sleeve, the first fixing head, and the second fixing head are integrally formed.

[0012] Preferably, along the axial direction of the impeller handle, one end of the magnet abuts against the first protrusion, and the other end of the magnet abuts against the second protrusion; along the radial direction of the impeller handle, one end of the magnet abuts against the outer peripheral wall of the impeller handle, and the other end of the magnet abuts against the stainless steel sleeve.

[0013] Preferably, the impeller body includes an impeller base and an impeller top cover. The impeller base is fixedly connected to the second end of the impeller handle, and the impeller top cover is fixedly disposed on the impeller base. The impeller handle, the impeller base, and the impeller top cover are arranged coaxially.

[0014] Preferably, it also includes a first bushing and a second bushing;

[0015] The first end of the impeller handle is provided with a groove communicating with the through hole, and the first bushing is fixedly inserted into the groove. The inner peripheral wall of the first bushing is flush with the inner peripheral wall of the through hole.

[0016] The impeller base is fixedly inserted into the second end of the impeller handle. The impeller base has a sleeve hole that communicates with the through hole. The second bushing is fixedly inserted into the sleeve hole and abuts against the second end of the impeller handle. The inner peripheral wall of the second bushing is flush with the inner peripheral wall of the through hole.

[0017] Preferably, the second end of the impeller handle is provided with an insertion ring groove, the first end of the impeller base is fixedly inserted into the insertion ring groove, the second end of the impeller base is fixedly connected to the impeller top cover, and the outer peripheral wall of the second end of the impeller handle is flush with the outer peripheral wall of the first end of the impeller base.

[0018] Preferably, the impeller base has a protruding insertion part on the side facing the impeller cover, and the impeller cover has a corresponding insertion groove on the side facing the impeller base, with the insertion part fixedly inserted into the insertion groove.

[0019] Preferably, the insertion part is welded to the insertion slot.

[0020] A water pump, comprising:

[0021] Rotor shaft;

[0022] As described in any of the preceding descriptions, the rotor shaft passes through the perforation.

[0023] Beneficial effects:

[0024] The impeller rotor assembly provided by this utility model has a magnet fixedly disposed within a receiving groove formed by a first protrusion, a second protrusion, and an impeller shank. A stainless steel sleeve is fitted over the outside of the impeller shank, fitting snugly against the magnet. The covering effect of the stainless steel sleeve reliably confines the magnet within the receiving groove, ensuring reliable and stable installation. The first protrusion has a first fixing groove, and the second protrusion has a second fixing groove. Both ends of the stainless steel sleeve are respectively fixedly inserted into the first and second fixing grooves, making installation reliable and convenient. In this impeller rotor assembly, the part covering the magnet is changed from a traditional plastic structure to a stainless steel sleeve, reducing the use of plastic materials, effectively suppressing the thermal expansion of the plastic structure, and effectively reducing the thickness while ensuring the overall strength and stability of the impeller rotor assembly. When assembled onto a water pump, this effectively avoids the problem of excessively small air gap caused by the overall thermal expansion and deformation of the impeller rotor assembly, ensuring reliable and efficient operation of the water pump. Attached Figure Description

[0025] Figure 1 This is a cross-sectional schematic diagram of the impeller rotor assembly provided by this utility model;

[0026] Figure 2 This utility model is based on Figure 1 A magnified view of a portion of point A in the middle;

[0027] Figure 3 This utility model is based on Figure 1 A magnified view of a portion of point B in the middle;

[0028] Figure 4 This is a cross-sectional schematic diagram of the water pump provided by this utility model.

[0029] In the picture:

[0030] 1. Impeller handle; 101. Perforation; 11. First protrusion; 111. First fixing groove; 12. Second protrusion; 121. Second fixing groove; 13. Insertion groove; 14. Insertion ring groove;

[0031] 2. Impeller base; 21. Sleeve hole; 22. Insertion part;

[0032] 3. Impeller cover; 31. Insertion slot;

[0033] 4. Magnet;

[0034] 5. Stainless steel sleeve; 51. First fixing head; 52. Second fixing head;

[0035] 61. First bushing; 62. Second bushing;

[0036] 7. Rotor shaft. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] This embodiment provides an impeller rotor assembly. (Refer to...) Figures 1 to 4As shown, the impeller rotor assembly includes an impeller shank 1, an impeller body, a magnet 4, and a stainless steel sleeve 5. The impeller shank 1 has a through hole 101 along its axial direction for the rotor shaft 7 to pass through. The outer peripheral wall of the first end of the impeller shank 1 has a first protrusion 11 and a second protrusion 12, spaced apart. The first protrusion 11 and the second protrusion 12, together with the outer peripheral wall of the impeller shank 1, form a receiving groove. The first protrusion 11 has a first fixing groove 111, and the second protrusion 12 has a second fixing groove 121. The impeller body is disposed at the second end of the impeller shank 1, and the impeller body and the impeller shank 1 are coaxially arranged. The magnet 4 is fixedly disposed within the receiving groove. The stainless steel sleeve 5 is sleeved on the outside of the impeller shank 1, and the stainless steel sleeve 5 is in close contact with the magnet 4. The first end of the stainless steel sleeve 5 is fixedly inserted into the first fixing groove 111, and the second end of the stainless steel sleeve 5 is fixedly inserted into the second fixing groove 121.

[0042] In this embodiment, the magnet 4 is fixedly disposed within the receiving groove formed by the first protrusion 11, the second protrusion 12, and the impeller shank 1. A stainless steel sleeve 5 is fitted onto the outer side of the impeller shank 1, and the stainless steel sleeve 5 fits snugly against the magnet 4. The covering effect of the stainless steel sleeve 5 reliably confines the magnet 4 within the receiving groove, ensuring reliable and stable installation of the magnet 4. The first protrusion 11 has a first fixing groove 111, and the second protrusion 12 has a second fixing groove 121. Both ends of the stainless steel sleeve 5 are respectively fixedly inserted into the first fixing groove 111 and the second fixing groove 121, making the installation of the stainless steel sleeve 5 reliable and convenient. In this impeller rotor assembly, the part covering the magnet 4 is changed from a traditional plastic structure to a stainless steel sleeve 5, which can reduce the use of plastic consumables, effectively suppress the thermal expansion of the plastic structure, and effectively reduce the thickness while ensuring the overall strength and stability of the impeller rotor assembly. When assembled onto the water pump, it can effectively avoid the problem of excessively small air gap caused by the overall thermal expansion and deformation of the impeller rotor assembly, ensuring reliable and effective operation of the water pump.

[0043] For example, the thickness of the stainless steel sleeve 5 is set to 0.25 mm.

[0044] In this embodiment, the magnet 4 is configured as a magnetic ring located in the receiving groove and sleeved on the outer peripheral wall of the impeller handle 1.

[0045] Optionally, a rounded corner or chamfer may be provided between the first protrusion 11 and the impeller shank 1 and / or between the second protrusion 12 and the impeller shank 1. This arrangement can avoid stress concentration between the first protrusion 11 and the impeller shank 1 and / or between the second protrusion 12 and the impeller shank 1, effectively ensuring the reliability of the impeller shank 1.

[0046] In this embodiment, in the axial direction of the impeller handle 1, one end of the magnet 4 is tightly abutted against the first protrusion 11, and the other end of the magnet 4 is tightly abutted against the second protrusion 12; in the radial direction of the impeller handle 1, one end of the magnet 4 is tightly abutted against the outer peripheral wall of the impeller handle 1, and the other end of the magnet 4 is tightly abutted against the stainless steel sleeve 5. This arrangement ensures that the magnet 4 is completely interference-fitted and fixedly inserted into the receiving groove, guaranteeing reliable and stable installation of the magnet 4 and preventing movement.

[0047] Specifically, in this embodiment, the first end of the stainless steel sleeve 5 is bent towards the first protrusion 11 and has a first fixing head 51, and the second end of the stainless steel sleeve 5 is bent towards the second protrusion 12 and has a second fixing head 52. The first fixing head 51 is fixedly inserted into the first fixing groove 111, and the second fixing head 52 is fixedly inserted into the second fixing groove 121. Specifically, the first fixing head 51 and the first fixing groove 111 are interference-fitted, and the second fixing head 52 and the second fixing groove 121 are interference-fitted.

[0048] Specifically, the stainless steel sleeve 5, the first fixing head 51, and the second fixing head 52 are integrally formed, resulting in a simple structure and convenient processing. The first fixing head 51 and the second fixing head 52, like the stainless steel sleeve 5, are both made of stainless steel.

[0049] For example, the included angle between the first fixing head 51 and the stainless steel sleeve 5 is set to 120°, and the included angle between the second fixing head 52 and the stainless steel sleeve 5 is set to 120°.

[0050] For example, rounded corners or chamfers are provided between the first fixing head 51 and the stainless steel sleeve 5, and between the second fixing head 52 and the stainless steel sleeve 5.

[0051] In this embodiment, the impeller body includes an impeller base 2 and an impeller top cover 3. The impeller base 2 is fixedly connected to the second end of the impeller handle 1, and the impeller top cover 3 is fixedly disposed on the impeller base 2. The impeller handle 1, the impeller base 2, and the impeller top cover 3 are arranged coaxially. Specifically, the impeller handle 1 and the impeller base 2 are respectively manufactured by two injection molding processes.

[0052] In this embodiment, the impeller rotor assembly further includes a first bushing 61 and a second bushing 62. A groove 13 communicating with the through hole 101 is provided at the first end of the impeller shank 1. The first bushing 61 is fixedly inserted into the groove 13, and its inner circumferential wall is flush with the inner circumferential wall of the through hole 101. The impeller base 2 is fixedly inserted into the second end of the impeller shank 1. The impeller base 2 has a sleeve hole 21 communicating with the through hole 101. The second bushing 62 is fixedly inserted into the sleeve hole 21 and abuts against the second end of the impeller shank 1. Its inner circumferential wall is flush with the inner circumferential wall of the through hole 101. Specifically, the groove 13 allows for reliable insertion of the first bushing 61. The sleeve hole 21 cooperates with the end face of the second end of the impeller shank 1, ensuring reliable and stable installation of the second bushing 62. The inner circumferential walls of the first bushing 61 and the second bushing 62 are flush with the inner circumferential wall of the through hole 101, which can effectively accommodate the insertion of the rotor shaft 7. In the actual installation process, the rotor shaft 7 is inserted through the first bushing 61, the through hole 101 and the second bushing 62 in sequence.

[0053] Optionally, both the first bushing 61 and the second bushing 62 are ceramic bushings.

[0054] Preferably, the outer peripheral wall of the first bushing 61 is provided with a first limiting groove, and the impeller shank 1 is provided with a first limiting head on the inner peripheral wall of the through hole 11. When the first bushing 61 is installed in the through hole 11, the first limiting head is inserted into the first limiting groove, which can reliably limit the rotation of the first bushing 61 and prevent the first bushing 61 from rotating about its own axis relative to the through hole 11.

[0055] Preferably, the outer peripheral wall of the second bushing 62 is provided with a second limiting groove, and the impeller base 2 is provided with a corresponding second limiting head on the inner peripheral wall of the sleeve hole 21. When the second bushing 62 is installed in the sleeve hole 21, the second limiting head is inserted into the second limiting groove, which can reliably limit the rotation of the second bushing 62 and prevent the second bushing 62 from rotating about its own axis relative to the sleeve hole 21.

[0056] Specifically, the second end of the impeller handle 1 is provided with an insertion ring groove 14, the first end of the impeller base 2 is fixedly inserted into the insertion ring groove 14, the second end of the impeller base 2 is fixedly connected to the impeller top cover 3, and the outer peripheral wall of the second end of the impeller handle 1 is flush with the outer peripheral wall of the first end of the impeller base 2. The insertion ring groove 14 allows the impeller base 2 to be reliably and effectively inserted.

[0057] Specifically, the impeller base 2 has a protruding insertion part 22 on the side facing the impeller top cover 3, and the impeller top cover 3 has a corresponding insertion groove 31 on the side facing the impeller base 2. The insertion part 22 is fixedly inserted into the insertion groove 31. The insertion groove 31 ensures effective positioning between the impeller top cover 3 and the impeller base 2, and also ensures a reliable and effective fixed connection between the two. The insertion part 22 and the insertion groove 31 are configured for an interference fit.

[0058] Specifically, the insertion part 22 is welded to the insertion slot 31. Welding further ensures that the impeller cover 3 and the impeller base 2 are reliably and securely fixed.

[0059] This embodiment also provides a water pump, which includes a rotor shaft 7 and the aforementioned impeller rotor assembly. The rotor shaft 7 passes through a through hole 101. Specifically, the rotor shaft 7 passes through a first bushing 61, the through hole 101, and a second bushing 62, and is connected to the first bushing 61, the through hole 101, and the second bushing 62. Applying the aforementioned impeller rotor assembly to the water pump achieves all the beneficial effects of the aforementioned impeller rotor assembly, namely, simple structure, reliable and stable operation, reduced overall size, and effective suppression of thermal expansion and deformation of the impeller rotor assembly while avoiding excessively small air gaps, thus ensuring effective operation of the water pump.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An impeller rotor assembly, characterized in that, include: Impeller handle (1), the impeller handle (1) has a through hole (101) along its own axial direction for the rotor shaft (7) to pass through, the outer peripheral wall of the first end of the impeller handle (1) has a first protrusion (11) and a second protrusion (12) protruding out, the first protrusion (11) and the second protrusion (12) are spaced apart, the first protrusion (11), the second protrusion (12) and the outer peripheral wall of the impeller handle (1) together form a receiving groove, the first protrusion (11) has a first fixing groove (111) and the second protrusion (12) has a second fixing groove (121); An impeller body is disposed at the second end of the impeller handle (1), and the impeller body and the impeller handle (1) are coaxially arranged; A magnet (4) is fixedly disposed in the receiving groove; A stainless steel sleeve (5) is fitted on the outside of the impeller handle (1). The stainless steel sleeve (5) is in contact with the magnet (4). The first end of the stainless steel sleeve (5) is fixedly inserted into the first fixing groove (111), and the second end of the stainless steel sleeve (5) is fixedly inserted into the second fixing groove (121).

2. The impeller rotor assembly according to claim 1, characterized in that, The first end of the stainless steel sleeve (5) is bent toward the first protrusion (11) and a first fixing head (51) is provided. The second end of the stainless steel sleeve (5) is bent toward the second protrusion (12) and a second fixing head (52) is provided. The first fixing head (51) is fixedly inserted into the first fixing groove (111), and the second fixing head (52) is fixedly inserted into the second fixing groove (121).

3. The impeller rotor assembly according to claim 2, characterized in that, The stainless steel sleeve (5), the first fixing head (51), and the second fixing head (52) are integrally formed.

4. The impeller rotor assembly according to claim 1, characterized in that, Along the axial direction of the impeller handle (1), one end of the magnet (4) is tightly abutted against the first protrusion (11), and the other end of the magnet (4) is tightly abutted against the second protrusion (12); along the radial direction of the impeller handle (1), one end of the magnet (4) is tightly abutted against the outer peripheral wall of the impeller handle (1), and the other end of the magnet (4) is tightly abutted against the stainless steel sleeve (5).

5. The impeller rotor assembly according to claim 1, characterized in that, The impeller body includes an impeller base (2) and an impeller top cover (3). The impeller base (2) is fixedly connected to the second end of the impeller handle (1). The impeller top cover (3) is fixedly disposed on the impeller base (2). The impeller handle (1), the impeller base (2) and the impeller top cover (3) are arranged coaxially.

6. The impeller rotor assembly according to claim 5, characterized in that, It also includes a first bushing (61) and a second bushing (62); The first end of the impeller handle (1) is provided with a groove (13) communicating with the through hole (101), and the first bushing (61) is fixedly inserted into the groove (13). The inner peripheral wall of the first bushing (61) is flush with the inner peripheral wall of the through hole (101). The impeller base (2) is fixedly inserted into the second end of the impeller handle (1). The impeller base (2) has a sleeve hole (21) that communicates with the through hole (101). The second bushing (62) is fixedly inserted into the sleeve hole (21) and abuts against the second end of the impeller handle (1). The inner peripheral wall of the second bushing (62) is flush with the inner peripheral wall of the through hole (101).

7. The impeller rotor assembly according to claim 6, characterized in that, The second end of the impeller handle (1) is provided with a insertion ring groove (14), the first end of the impeller base (2) is fixedly inserted into the insertion ring groove (14), the second end of the impeller base (2) is fixedly connected to the impeller top cover (3), and the outer peripheral wall of the second end of the impeller handle (1) is flush with the outer peripheral wall of the first end of the impeller base (2).

8. The impeller rotor assembly according to claim 5, characterized in that, The impeller base (2) has a protruding insertion part (22) on the side facing the impeller cover (3), and the impeller cover (3) has a corresponding insertion groove (31) on the side facing the impeller base (2), and the insertion part (22) is fixedly inserted into the insertion groove (31).

9. The impeller rotor assembly according to claim 8, characterized in that, The plug part (22) is welded to the plug groove (31).

10. A water pump, characterized in that, include: Rotor shaft (7); The impeller rotor assembly as claimed in any one of claims 1-9, wherein the rotor shaft (7) passes through the through hole (101).

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