Automobile electronic water pump motor

Abstract

The utility model relates to the technical field of automobile accessories, and particularly provides an automobile electronic water pump motor, which comprises a stator assembly and a rotor assembly, and is characterized in that the stator assembly consists of a stator iron core and a plurality of coils; the rotor assembly is composed of a rotor iron core, a rotating shaft and magnetic steel. The upper end of the stator core is provided with an upper framework, the lower end of the stator core is provided with a lower framework, the upper end of the upper framework is provided with an upper end frame, the upper end frame is provided with confluence plates, and every two coils are connected in parallel on one confluence plate; the upper end of the stator assembly is provided with a cover plate, and the cover plate is provided with a protective sleeve. The arrangement of the bus board can realize the connection of two windings in a parallel winding mode, so as to increase the current bearing capacity, enable the motor to output larger current under the same voltage, and further improve the power of the motor. The cover plate is arranged so that the upper end frame provided with the confluence plate can be pressed, assembling of the stator assembly is facilitated, the protection sleeve on the cover plate can form protection on the outer side of the confluence plate, and the assembling application effect of the confluence plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive parts, and particularly relates to an automotive electronic water pump motor. Background Art

[0002] The electronic water pump is the power source of the entire cooling system of new energy vehicles. The power batteries, drive motors, etc. of new energy vehicles all rely on the electronic water pump to drive the coolant to circulate and cool.

[0003] The publicly disclosed Chinese patent with the publication number CN217984817U discloses an automotive electronic water pump motor, which relates to the technical field of water pump motors and includes: an inner stator, an outer stator, a rotor assembly and an insulating sleeve. The inner stator is arranged in the inner cavity of the outer stator. An insulating sleeve is arranged at the upper end of the inner stator. A rotor assembly is arranged in the inner cavity of the inner stator. A shaft is arranged in the inner cavity of the rotor assembly, and the rotor assembly can rotate according to the shaft.

[0004] The electronic water pump motor disclosed in the above patent adopts a single winding method, and the output power of the motor is not good; and in the prior art, there is no locking structure for the magnetic steel relative to the rotor, and it is easy to shift during the potting process, affecting the encapsulation and molding effect of the rotor assembly. Summary of the Utility Model

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide an automotive electronic water pump motor, which is used to solve the problems that the single winding method in the prior art affects the output power performance of the motor and the magnetic steel is easy to shift during the potting process.

[0006] To achieve the above purpose and other related purposes, the present utility model provides an automotive electronic water pump motor, which includes a stator assembly and a rotor assembly. The stator assembly is composed of a stator core and a plurality of coils, and the coils are wound around the stator core; the rotor assembly is composed of a rotor core, a rotating shaft and magnetic steel. The rotating shaft is inserted through the rotor core, and the magnetic steel is circumferentially distributed evenly inside the rotor core and is parallel to the rotating shaft.

[0007] An upper skeleton is arranged at the upper end of the stator core, and a lower skeleton is arranged at the lower end. The lower end of the upper skeleton is connected to the upper end of the lower skeleton inside the stator core to form a pole body, and a single coil is wound around one pole body.

[0008] An upper end frame is arranged at the upper end of the upper skeleton, and a bus bar is arranged on the upper end frame. Every two coils are connected in parallel to a bus bar.

[0009] A cover plate is arranged at the upper end of the stator assembly, and a protective sleeve is arranged on the cover plate; the cover plate is pressed on the upper end of the upper end frame, and the protective sleeve is sleeved outside the bus bar.

[0010] In an embodiment of the present utility model, the number of the upper end frames is half of the number of coils. A plurality of upper end frames are stacked on the upper end of the upper skeleton in sequence, and the cover plate is pressed on the upper end frame located at the uppermost end.

[0011] In an embodiment of the present utility model, the cover plate, the upper end frame, and the upper skeleton are fixedly penetrated by the same fixing pin.

[0012] In an embodiment of the present utility model, an injection molded part is fitted on the rotor core. The injection molded part passes through the area of the rotor core that accommodates the permanent magnet to wrap and position the permanent magnet, and both the upper and lower ends of the injection molded part extend to the outside of the rotor core.

[0013] In an embodiment of the present utility model, a glue filling hole and a positioning hole are provided at the upper end of the injection molded part. A short pin is fitted in the positioning hole, and the lower end of the short pin abuts against the permanent magnet to lock the distribution position of the permanent magnet in the rotor core; the glue filling hole is used to fill glue into the rotor core to encapsulate and fix the rotor core and the permanent magnet.

[0014] In an embodiment of the present utility model, the lower end of the injection molded part is provided with a first convex ring and a second convex ring distributed coaxially; the second convex ring is located inside the first convex ring; a magnetic cover is provided at the lower end of the first convex ring, and a thrust washer is provided at the lower end of the second convex ring. The edge of the thrust washer abuts against the inner wall of the first convex ring.

[0015] In an embodiment of the present utility model, an O-ring is provided inside the second convex ring, and the O-ring is outside the connection between the rotating shaft and the lower end of the injection molded part.

[0016] As described above, the automotive electronic water pump motor of the present utility model has the following beneficial effects:

[0017] By providing a bus bar, a single bus bar can form a parallel connection for every two coils in the stator assembly to achieve the connection of the two-parallel winding method, so as to increase the current-carrying capacity, enable the motor to output a larger current under the same voltage, and thus improve the power of the motor; in addition, the two-parallel winding method reduces the influence of a single winding failure on the performance of the entire motor and helps to improve the stability and reliability of the motor; by providing a cover plate, the cover plate can press the upper end frame provided with the bus bar, which is convenient for the assembly of the stator assembly. The protective sleeve on the cover plate can form a protection outside the bus bar to improve the assembly and application effect of the bus bar; by providing an injection molded part, the injection molded part can lock the distribution position of the permanent magnet in the rotor core, prevent the permanent magnet from shifting during the glue filling process, and thus improve the encapsulation and molding effect of the rotor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It shows a schematic diagram of the overall structure of the present utility model.

[0019] Figure 2Shown is an exploded structural schematic diagram of the present utility model.

[0020] Figure 3 Shown is a sectional structural schematic diagram of the present utility model.

[0021] Figure 4 Shown is a partial exploded structural schematic diagram of the stator assembly of the present utility model with the upper end frame and the cover plate removed.

[0022] Figure 5 Shown is an exploded structural schematic diagram of the rotor assembly of the present utility model from another perspective.

[0023] Description of Element Numbers

[0024] Stator core 1; coil 2; rotor core 3; rotating shaft 4; permanent magnet 5; upper skeleton 6; lower skeleton 7; pole body 8; upper end frame 9; bus bar 91; cover plate 10; protective sleeve 101; injection molded part 11; potting hole 111; positioning hole 112; first convex ring 113; second convex ring 114; short pin 12; magnetic cover 13; thrust washer 14; O-ring 15. Detailed Embodiment

[0025] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0026] Please refer to Figures 1 to 5 . It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration, and are not used to limit the scope for the implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0027] Please refer to Figures 1 - 5, the utility model provides an automotive electronic water pump motor, which includes a stator assembly and a rotor assembly. The stator assembly is composed of a stator core 1 and a plurality of coils 2, and the coils 2 are wound around the stator core 1. The rotor assembly is composed of a rotor core 3, a rotating shaft 4, and a permanent magnet 5. The rotating shaft 4 is inserted through the rotor core 3, and the permanent magnets 5 are circumferentially and uniformly distributed inside the rotor core 3 and are parallel to the rotating shaft 4. When the motor starts, the position sensor detects the position of the rotor assembly and transmits this information to the motor controller. The controller controls the energization of the coil 2 windings in the stator assembly according to the received position information to generate a magnetic field, thereby driving the rotor assembly to rotate. When the rotor assembly rotates to a specific position, the position sensor detects the position of the rotor assembly again and notifies the motor controller to perform the next energization control, enabling the brushless DC water pump to achieve continuous rotation.

[0028] An upper skeleton 6 is provided at the upper end of the stator core 1, and a lower skeleton 7 is provided at the lower end. The lower end of the upper skeleton 6 is connected to the upper end of the lower skeleton 7 inside the stator core 1 to form a pole body 8, and a single coil 2 is correspondingly wound around a pole body 8. An upper end frame 9 is provided at the upper end of the upper skeleton 6, and a bus bar 91 is provided on the upper end frame 9. Every two coils 2 are connected in parallel to a bus bar 91. The number of upper end frames 9 is one-half of the number of coils 2, and a plurality of upper end frames 9 are sequentially stacked on the upper end of the upper skeleton 6. The setting of the bus bar 91 can achieve the connection of the two-parallel winding method to increase the current-carrying capacity, enabling the motor to output a larger current under the same voltage, thereby improving the power of the motor. In addition, the two-parallel winding method reduces the impact of a single winding failure on the performance of the entire motor, contributing to improving the stability and reliability of the motor. A cover plate 10 is provided at the upper end of the stator assembly, and a protective sleeve 101 is provided on the cover plate 10. The cover plate 10 is pressed on the upper end of the upper end frame 9. Specifically, the cover plate 10 is pressed on the upper end frame 9 located at the uppermost end. The protective sleeve 101 is sleeved outside the bus bar 91 to form a protection for the bus bar 91. The cover plate 10, the upper end frame 9, and the upper skeleton 6 are fixedly connected and penetrated by the same fixing pin. The setting of the cover plate 10 can facilitate the quick assembly and application of the stator assembly.

[0029] An injection molded part 11 is fitted on the rotor core 3. The injection molded part 11 passes through the area of the rotor core 3 that houses the permanent magnets 5 to wrap and position the permanent magnets 5. Both the upper and lower ends of the injection molded part 11 extend outside the rotor core 3. A glue filling hole 111 and a positioning hole 112 are provided at the upper end of the injection molded part 11. A short pin 12 is fitted in the positioning hole 112. The lower end of the short pin 12 abuts against the permanent magnet 5 to lock the distribution position of the permanent magnet 5 in the rotor core 3. The glue filling hole 111 is used to fill glue into the rotor core 3 to encapsulate and fix the rotor core 3 and the permanent magnet 5. The setting of the injection molded part 11 can lock the distribution position of the permanent magnet 5 in the rotor core 3, prevent the permanent magnet 5 from shifting during the glue filling process, and thus improve the encapsulation and molding effect of the rotor assembly. The lower end of the injection molded part 11 is provided with a first convex ring 113 and a second convex ring 114 that are coaxially distributed. The second convex ring 114 is located inside the first convex ring 113. A magnetic cover 13 is provided at the lower end of the first convex ring 113, and a thrust washer 14 is provided at the lower end of the second convex ring 114. The edge of the thrust washer 14 abuts against the inner wall of the first convex ring 113. The thrust washer 14 can provide sealing performance and axial support. An O-ring 15 is provided inside the second convex ring 114. The O-ring 15 is arranged outside the connection between the rotating shaft 4 and the lower end of the injection molded part 11. The cooperation of the thrust washer 14 and the O-ring 15 with the injection molded part 11 can improve the overall sealing performance of the rotor assembly.

[0030] In summary, for the automotive electronic water pump motor provided by the present utility model, the setting of the bus bar 91 can realize the connection of the two-parallel winding method of the winding to increase the current-carrying capacity, so that the motor can output a larger current under the same voltage, and thus improve the power of the motor; the setting of the cover plate 10 can press and fit the upper end frame provided with the bus bar, which is convenient for the assembly of the stator assembly. The protective sleeve 101 on the cover plate 10 can form a protection outside the bus bar 91 to improve the assembly and application effect of the bus bar 91; the setting of the injection molded part 11 can lock the distribution position of the permanent magnet 5 in the rotor core 3 and improve the encapsulation and molding effect of the rotor assembly. Therefore, the present utility model effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0031] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. An automotive electronic water pump motor, comprising a stator assembly and a rotor assembly. The stator assembly consists of a stator core (1) and a plurality of coils (2), and the coils (2) are wound around the stator core (1); the rotor assembly consists of a rotor core (3), a rotating shaft (4), and magnetic steel (5). The rotating shaft (4) passes through the rotor core (3), and the magnetic steel (5) is circumferentially and evenly distributed inside the rotor core (3) and is parallel to the rotating shaft (4). It is characterized in that: An upper skeleton (6) is provided at the upper end of the stator core (1), and a lower skeleton (7) is provided at the lower end. The lower end of the upper skeleton (6) and the upper end of the lower skeleton (7) are connected inside the stator core (1) to form a pole body (8), and a single coil (2) is correspondingly wound around a pole body (8). An upper end frame (9) is provided at the upper end of the upper skeleton (6), and a bus bar (91) is provided on the upper end frame (9). Every two coils (2) are connected in parallel to a bus bar (91). A cover plate (10) is provided at the upper end of the stator assembly, and a protective sleeve (101) is provided on the cover plate (10); the cover plate (10) is pressed on the upper end of the upper end frame (9), and the protective sleeve (101) is sleeved outside the bus bar (91).

2. The automotive electronic water pump motor according to claim 1, characterized in that: The number of the upper end frames (9) is one-half of the number of the coils (2). A plurality of upper end frames (9) are sequentially stacked on the upper end of the upper skeleton (6), and the cover plate (10) is pressed on the upper end frame (9) located at the uppermost end.

3. The automotive electric water pump motor according to claim 2, characterized in that: The cover plate (10), the upper end frame (9), and the upper skeleton (6) are fixedly connected by the same fixing pin.

4. The automotive electronic water pump motor according to claim 1, characterized in that: An injection molded part (11) is fitted on the rotor core (3). The injection molded part (11) passes through the area of the rotor core (3) that accommodates the magnetic steel (5) to wrap and position the magnetic steel (5), and both the upper and lower ends of the injection molded part (11) extend outside the rotor core (3).

5. The automotive electronic water pump motor according to claim 4, characterized in that: A glue filling hole (111) and a positioning hole (112) are provided at the upper end of the injection molded part (11). A short pin (12) is fitted in the positioning hole (112), and the lower end of the short pin (12) abuts against the magnetic steel (5) to lock the distribution position of the magnetic steel (5) in the rotor core (3); the glue filling hole (111) is used to fill glue into the rotor core (3) to encapsulate and fix the rotor core (3) and the magnetic steel (5).

6. The automotive electronic water pump motor according to claim 5, wherein: The lower end of the injection molded part (11) is provided with a first convex ring (113) and a second convex ring (114) that are coaxially distributed; the second convex ring (114) is located inside the first convex ring (113); a magnetic cover (13) is provided at the lower end of the first convex ring (113), and a thrust washer (14) is provided at the lower end of the second convex ring (114), and the edge of the thrust washer (14) abuts against the inner wall of the first convex ring (113).

7. The automotive electronic water pump motor according to claim 6, characterized in that: An O-ring (15) is provided inside the second convex ring (114), and the O-ring (15) is sealed outside the connection between the rotating shaft (4) and the lower end of the injection molded part (11).

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