Pump and its motor stator

Abstract

The present invention relates to the field of electric technology, and provides a pump and a motor stator thereof. The electrode stator for the pump is fixed in the pump casing, and includes a stator core, an insulating frame fixed on the stator core, and a winding wound on the insulating frame. It also includes an elastic member fixed to the insulating frame in an insert-molded manner, and the elastic member is used to abut against the pump casing or a component fixed relative to the pump casing to prevent the vibration of the stator. The motor stator and the pump having the motor stator provided in an embodiment of the present invention use elastic members insert-molded on the insulating frame to prevent the vibration of the motor stator, have a simple structure, reduce the number of parts, simplify the assembly process, and improve the reliability and stability of the pump.

Description

Technical Field

[0001] The present invention relates to the field of electric technology, and in particular to a pump and a motor stator thereof. Background Art

[0002] A pump is a machine that transports or pressurizes fluids. It typically consists of a rotatable motor rotor, a motor stator fixed in a housing, and a printed circuit board electrically connected to the motor stator. During pump operation, the alternating electromagnetic field causes the motor stator to bear alternating loads. If the motor stator is not adequately secured, it will vibrate, increasing the noise during pump operation. Large vibrations can also cause electronic components such as the pump's printed circuit board and other parts to loosen or even fall off. The motor stator is typically fixed to the housing using bolts and multiple coil springs. This fixing method results in high costs and the coil springs are prone to loosening or falling off. Summary of the Invention

[0003] In view of this, the present invention aims to provide a pump and a motor stator thereof that can solve or at least alleviate the above problems.

[0004] The present invention provides a motor stator for a pump, which is fixed in a housing and includes a stator core, an insulating frame fixed to the stator core, and a winding wound on the insulating frame. It also includes an elastic member fixed to the insulating frame, and the elastic member is used to abut against the housing or a component fixed relative to the housing to prevent vibration of the stator.

[0005] In some embodiments, the elastic member is annular and forms waves along the axial direction, including a plurality of troughs and crests spaced apart from each other, the troughs are fixed in the insulating frame, and the crests are used to abut against the shell or the component.

[0006] In some embodiments, the elastic member is in a broken ring shape, the elastic member is broken at one of the troughs, and two fixed ends are formed at the break, the two fixed ends are bent and extended from the trough, and the two fixed ends are embedded in and fixed to the insulating frame.

[0007] In some embodiments, the insulating frame includes a plurality of outer baffles arranged at intervals along the circumferential direction, and a first fixing portion and at least one second fixing portion extending radially outward are provided at different outer baffles, and the sum of the number of the first fixing portions and the second fixing portions corresponds to the number of the troughs.

[0008] In some embodiments, the two fixed ends and the troughs where they are located are fixed in the first fixing portion.

[0009] In some embodiments, the elastic member includes at least two pairs of the troughs and the peaks.

[0010] In some embodiments, the elastic member is integrally fixed to the insulating frame by insert molding.

[0011] The present invention provides a pump comprising a housing, a motor and an impeller arranged in the housing, wherein the motor comprises a stator and a rotor, the impeller and the rotor are connected, and the stator is the stator described above.

[0012] In some embodiments, the pump further comprises a sleeve fixed relative to the casing, the sleeve comprising an outer wall and a main body located inside the outer wall, the stator is sleeved around the outer periphery of the main body, and the main body is connected to the outer wall via a connecting portion.

[0013] In some embodiments, the elastic member of the stator abuts against the connecting portion.

[0014] In some embodiments, a rib is provided on a side of the connecting portion facing the stator, and the elastic member abuts against the rib.

[0015] In some embodiments, there are a plurality of ribs, and the plurality of ribs extend radially from the center toward the periphery of the connecting portion.

[0016] The motor stator and the pump having the motor stator provided in the embodiments of the present invention use elastic parts insert-molded on the insulating frame to prevent vibration of the motor stator. The structure is simple, the number of parts is reduced, the assembly process is simplified, and the reliability and stability of the pump are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional assembly diagram of a pump according to an embodiment of the present invention is shown.

[0018] Figure 2 Shown Figure 1 Exploded perspective view of the pump shown.

[0019] Figure 3 Shown Figure 1 An axial cross-section of the pump is shown.

[0020] Figure 4 Shown Figure 1 The stator of the pump is partially installed in the sleeve in an axial cross-sectional perspective view.

[0021] Figure 5 Shown Figure 1 The partial cross-sectional view of the pump stator portion shown is when installed in the sleeve.

[0022] Figure 6 Shown Figure 1 A perspective view of an insulating frame with elastic elements fixed to a stator of a pump is shown.

[0023] Figure 7 A three-dimensional view of an elastic member according to an embodiment of the present invention is shown.

[0024] Figure 8 A perspective view of an elastic member according to another embodiment of the present invention is shown.

[0025] Figure 9 Shows a fixed Figure 8 A three-dimensional view of the insulating frame of the elastic member shown.

[0026] Reference numerals: 200 - pump; 100 - housing; 101 - motor; 1 - upper shell; 12 - upper shell opening end; 2 - sleeve; 21 - body; 22 - outer wall; 23 - outer ring; 24 - rib; 25 - closed end; 26 - sleeve receiving chamber; 27 - support shaft; 28 - connecting portion; 3 - lower shell; 32 - lower shell opening end; 33 - stopper; 34 - step; 4 - rotor; 41 - rotor body; 42 - impeller ;5-stator; 50-insulating frame; 51-first skeleton; 511-first fixing part; 512-second fixing part; 513-through slot; 52-second skeleton; 53-stator core; 54-winding; 55-elastic member; 550-fixed end; 551-wave trough; 552-wave crest; 553-oblique section; 554-flat section; 56-inner baffle; 57-outer baffle; 6-end cover; 7-circuit board; 9-connector. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments to make the technical solutions and beneficial effects of the present invention more clearly understood. It should be understood that the drawings are provided for reference and illustration only and are not intended to limit the present invention. The dimensions shown in the drawings are only for the purpose of clarification and do not limit the proportional relationship.

[0028] Also refer to Figures 1 to 3 A pump 200 according to an embodiment of the present invention includes a housing 100, a motor 101 arranged in the housing 100, and an impeller 42. The housing 100 includes an upper shell 1 and a lower shell 3 connected to each other. A sleeve 2 is located in the housing 100 and is fixedly connected to the housing 100. The motor 101 includes a stator 5 and a rotor 4, the rotor 4 is accommodated in the sleeve 2, and the stator 5 is arranged in the accommodating space formed by the sleeve 2 and the housing 100. A support shaft 27 is fixed in the sleeve 2, preferably by insert molding. The rotor 4 is rotatably supported in the sleeve 2 by the support shaft 27. The impeller 42 is connected to the rotor 4. In this embodiment, the impeller 42 is formed as a whole with the rotor 4. In an optional embodiment, the impeller 42 is detachably attached to the rotor 4.

[0029] The sleeve 2 includes a main body 21 and an outer wall 22 connected to one end of the main body 21. The main body 21 is a cylindrical structure with one end open toward the upper shell 1 of the housing 100 and the other end closed. The outer wall 22 is annular and is disposed around and spaced from the main body 21. One end of the outer wall 22 is connected to the open end of the main body 21 via a connecting portion 28, and the other end extends toward the closed end of the main body 21. In this embodiment, the outer wall 22 has an axially extending outer ring 23 on its outer side.

[0030] In this embodiment, the upper shell 1 of the housing 100 has an upper shell open end 12 facing the lower shell 3. The upper shell open end 12 can be engaged between the outer ring 23 and the outer wall 22. The lower shell 3 has a lower shell open end 32 facing the upper shell 1. An end of the lower shell 3, away from the lower shell open end 32, is mounted with an end cap 6 having a circuit board 7 via a connector 9. The lower shell open end 32 is connected to the outer wall 22 of the sleeve 2. In this embodiment, the lower shell open end 32 is connected to the inner side of the outer wall 22. In this embodiment, the stator 5 is accommodated in the accommodation space formed by the sleeve 2 and the lower shell 3, and the rotor 4 and impeller 42 are accommodated in the accommodation space formed by the sleeve 2 and the upper shell 1.

[0031] The interior of the main body 21 of the sleeve 2 forms a sleeve receiving cavity 26 for accommodating the rotor 4. The rotor 4 is rotatably supported within the sleeve receiving cavity 26 by a support shaft 27. In this embodiment, the support shaft 27 is formed at the closed end 25 of the main body 21 by insert molding. The stator 5 is mounted on the inner wall of the lower shell 3 and sleeved around the outer periphery of the main body 21. In this embodiment, the stator 5 is arranged in the accommodation space formed by the sleeve 2 and the lower shell 3 by an axial press fit. That is, one axial end of the stator 5 abuts the connecting portion 28, and the other axial end abuts the lower shell 3, thereby preventing the stator 5 from loosening due to vibration.

[0032] The stator 5 includes a stator core 53, an insulating frame 50 fixed to the stator core 53, a plurality of windings 54 wound on the insulating frame 50, and an elastic member 55 mounted on the insulating frame 50. The insulating frame 50 includes a plurality of inner baffles 56 for winding the windings 54 and a corresponding number of outer baffles 57. Figure 4 The stator 5 is mounted on the main body 21 of the sleeve 2 via an inner baffle 56 located on the inner side. A plurality of ribs 24 are provided on the outer side of the main body 21 to prevent the stator 5 from moving circumferentially on the main body 21. The ribs 24 extend axially on the outer side of the main body 21. In this embodiment, each inner baffle 56 is positioned between two adjacent ribs 24.

[0033] The elastic member 55 is fixed on the insulating frame 50 by insert molding. Figure 5The elastic member 55 is fixed to one end of the insulating frame 50 adjacent to the connection portion 28 of the sleeve 2. The elastic member 55 abuts the connection portion 28, thereby pressing the insulating frame 50 toward the closed end of the lower shell 3. The lower shell 3 includes a stopper 33 extending radially inward from its inner side. The stator core 53 abuts against the stopper 33 under the action of the elastic member 55. In this embodiment, the ribs 24 also extend from the main body 21 to the side of the connection portion 28 facing the closed end of the lower shell 3. The elastic member 55 abuts the ribs 24 arranged on the connection portion 28. Preferably, these ribs 24 extend radially from the center of the connection portion 28 toward the periphery. Optionally, the lower shell 3 includes a step 34 extending radially inward from its inner side for abutting the other end of the insulating frame 50. In this case, the elastic member 55 presses the stator 5 between the connection portion 28 and the step 34.

[0034] In this embodiment, the insulating frame 50 includes a first frame 51 and a second frame 52 arranged vertically. The first frame 51 and the second frame 52 are mounted and fixed on the stator core 53 from opposite ends of the stator core 53. The elastic member 55 is fixed to the first frame 51 by insert molding. Figure 6 , the end of the first skeleton 51 adjacent to the connecting portion 28 of the sleeve 2 is provided with a first fixing portion 511 and a second fixing portion 512 extending radially outward. The outer baffle 57 is provided on the first skeleton 51. In this embodiment, the first fixing portion 511 and the second fixing portion 512 are respectively located at different outer baffles 57. Preferably, the first fixing portion 511 and the second fixing portion 512 are respectively located at two opposite outer baffles 57. In this embodiment, the radial outer side of the first fixing portion 511 has an axially opened through groove 513, and the middle of the second fixing portion 512 is provided with a through hole 514 to position the elastic member 55 during insert molding.

[0035] Also refer to Figure 7The elastic member 55 is annular and undulates along the axial direction, meaning that the entire elastic member 55 is not in a single plane. The elastic member 55 includes a plurality of troughs 551 and crests 552. The troughs 551 and crests 552 are spaced apart and connected to each other. The troughs 551 are fixed to the insulating frame 50. The crests 552 are used to abut against the housing 100 or a component fixed relative to the housing 100 to prevent vibration of the stator 5. In this embodiment, the crests 552 abut against the connection portion 28 of the sleeve 2, pressing the stator 5 against the lower housing 3 in a press-fit manner. In this embodiment, the elastic member 55 is formed by bending a strip of spring material (e.g., spring steel). Preferably, the elastic member 55 is broken at one of the troughs 551, forming two fixed ends 550 at the break. The two fixed ends 550 are bent in a direction different from the direction in which the trough 551 extends. In this embodiment, the two fixed ends 550 extend vertically upward from the trough in which they are located. Alternatively, the fixed end 550 may be bent radially outward from the wave trough. The fixed end 550 and the wave trough 551 in which it is located are fixed to the first fixing portion 511 of the first frame 51. The provision of the fixed end 550 ensures that the elastic member 55 is securely fixed to the insulating frame 50. In an alternative embodiment, the elastic member 55 may be a wave spring without a fixed end.

[0036] The other troughs 551 of the elastic member 55 (except the troughs 551 fixed in the first fixing portion 511) are fixed in the second fixing portion 512 of the first skeleton 51. In this embodiment, the elastic member 55 has two pairs of troughs 551 and crests 552. Therefore, in this embodiment, the first skeleton 51 includes a first fixing portion 511 and a second fixing portion 512. The elastic member 55 has at least two pairs of troughs 551 and crests 552, so that at least two crests 552 can press against the connecting portion 28 of the sleeve 2 to avoid uneven force. Also refer to Figure 8 and Figure 9 In another embodiment of the present invention, the elastic member 55 includes six pairs of troughs 551 and crests 552. In both embodiments, the troughs 551 and crests 552 of the elastic member 55 are evenly spaced relative to the outer baffle 57 of the insulating frame 50. Alternatively, the troughs 551 and crests 552 are symmetrically arranged in pairs. The designer can select the relative dimensions and number of pairs of troughs 551 and crests 552 of the elastic member 55 based on practical needs. In this embodiment, the crests 552 of the elastic member 55 abut against the ribs 24 located at the connection portion 28 of the sleeve 2.

[0037] like Figure 7As shown, the crest 552 includes two oblique sections 553 connected obliquely to the trough 551, and a flat section 554 located between the two oblique sections 553. The flat section 554 is located at the highest point of the crest 552 and is approximately parallel to the connecting portion, thereby better contacting the connecting portion 28 of the sleeve 2, thereby abutting the connecting portion 28 with the maximum contact area. The flat section 554 is axially higher than the top of the insulating frame 50. The elastic member 55 presses the stator 5 against the housing 3 by abutting the connecting portion 28 of the sleeve 2 with the flat section 554 of the crest 552, thereby preventing the stator 5 from loosening or even falling off due to vibration.

[0038] The above description is only a preferred specific embodiment of the present invention. The scope of protection of the present invention is not limited to the embodiments listed above. Any simple changes or equivalent replacements of the technical solutions that can be obviously obtained by any technician familiar with this technical field within the technical scope disclosed in the present invention fall within the scope of protection of the present invention.

Claims

1. A motor stator for a pump, fixed in a housing, comprising a stator core, an insulating frame fixed to the stator core, and a winding wound on the insulating frame, characterized in that: The invention also includes an elastic member fixed to the insulating frame, the elastic member is arranged at the end of the stator core, and a resistance portion is formed in the shell. The end of the stator core away from the elastic member abuts the resistance portion. The elastic member is used to be pressed by the shell or a component fixed relative to the shell, so that the stator core is pressed against the resistance portion by the force of the elastic member to prevent the stator from loosening due to vibration. The elastic member is integrally fixed to the insulating frame by insert molding. The elastic member is annular and forms waves in the axial direction, including a plurality of troughs and crests connected to each other at intervals. The troughs are embedded in the insulating frame, and the crests are used to abut the shell or the component fixed relative to the shell.

2. The stator according to claim 1, characterized in that The elastic member is broken at one of the wave valleys, and two fixed ends are formed at the break. The two fixed ends are bent and extended from the wave valley, and the two fixed ends are embedded in and fixed to the insulating frame.

3. The stator according to claim 2, characterized in that The insulating frame includes a plurality of outer baffles arranged at intervals along the circumferential direction, and a first fixing portion and at least one second fixing portion extending radially outward are provided at different outer baffles, and the sum of the number of the first fixing portions and the second fixing portions corresponds to the number of the troughs.

4. The stator according to claim 3, characterized in that The two fixed ends and the wave troughs where they are located are fixed in the first fixing portion.

5. The stator according to claim 1, characterized in that The elastic member includes at least two pairs of the wave valleys and the wave peaks.

6. A pump comprising a housing, a motor and an impeller disposed in the housing, wherein the motor comprises a stator and a rotor, and the impeller is connected to the rotor, characterized in that: The stator is the stator according to any one of claims 1 to 5.

7. The pump according to claim 6, characterized in that It also includes a sleeve fixed relative to the shell, the sleeve includes an outer wall and a main body located inside the outer wall, the stator is sleeved on the periphery of the main body, and the main body is connected to the outer wall through a connecting portion.

8. The pump according to claim 7, characterized in that The elastic member of the stator presses against the connecting portion.

9. The pump according to claim 8, characterized in that A rib is provided on a side of the connecting portion facing the stator, and the elastic member abuts against the rib.

10. The pump according to claim 9, characterized in that There are a plurality of ribs, and the plurality of ribs extend radially from the center toward the periphery of the connecting portion.

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