Fluid Drive Unit

Abstract

A fluid drive device comprising a stator unit, a position limiting part, and at least one conductive part, wherein at least a portion of the conductive part is positioned and fixed by the position limiting part, the conductive part comprises a first connecting end and a second connecting end, the first connecting end is electrically connected to the stator unit, and the second connecting end serves as a pin end when electrically connected to an external power source, the conductive part enables the stator unit to be electrically connected to the external power source, a portion of the conductive part is fitted into the position limiting part, the position limiting part is an injection part that contributes to pulling out the conductive end of the stator unit, the pulled out conductive end serves as a pin of an external interface, and also contributes to simplifying the assembly process of the fluid drive device.

Description

[Technical field]

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on January 25, 2021, bearing application number 202110099594.6 and entitled "Fluid Drive Unit," the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a fluid drive unit. [Background technology]

[0003] The fluid drive device includes a stator unit, and in order to supply electricity to the stator unit, the conductive ends of the stator unit must be electrically connected to an external power source. How to electrically connect the conductive ends of the stator unit to an external power source while simultaneously simplifying the assembly process of the fluid drive device is a technical issue that needs to be considered. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a fluid drive device which contributes to electrically connecting one end of a stator unit to an external power source and at the same time simplifies the assembly process of the fluid drive device.

[0005] In order to achieve the above object, the present invention is as follows. [Means for solving the problem]

[0006] The fluid drive unit of the present invention includes a stator unit, a position limiting part, and a conductive part, the conductive part being provided in a position limited or fixed to the position limiting part, the conductive part including a first connection end and a second connection end, the first connection end being electrically connected to the stator unit, and the second connection end being a pin end when electrically connected to an external power supply of the fluid drive unit, the stator unit being electrically connectable to the external power supply of the fluid drive unit by the conductive part, and a portion of the conductive part being fitted into the position limiting part, The position limiting part is an injection part, the fluid drive unit has an internal chamber, the stator unit and the position limiting part are located in the internal chamber, the stator unit and the position limiting part are arranged along the axial direction of the fluid drive unit, the stator unit is fixedly connected to the position limiting part, the position limiting part includes a main body part, the first connection end is located on one side of the main body part, the second connection end is located on one side of the main body part, the side where the first connection end is located and the side where the second connection end is located are different sides of the main body part, the first connection end is located on the upper side of the main body part and the second connection end is located on the lower side of the main body part, the insulating holder of the stator unit includes at least two positioning pillars, the positioning pillars are distributed along the circumferential direction of the insulating holder of the stator unit, the position limiting part includes at least two positioning holes, each of the positioning pillars passes through a corresponding one of the positioning holes, and each the positioning posts are provided to engage with the corresponding positioning holes, one end of the positioning posts protrudes from the positioning holes, and the protruding end of the positioning posts is heat-stakingly fixed to the position limiting component; the position limiting component includes at least one second protrusion, the second protrusion is provided to protrude from an upper surface of the main body, the second protrusion is located on one side of the first connection end, the first connection end includes a wiring groove, an enamel wire corresponding to a winding of the stator unit can pass through the wiring groove, the enamel wire located in the wiring groove is provided to contact with a corresponding groove wall of the wiring groove and is electrically connected to the wiring groove, the second protrusion and the first connection end are distributed along a radial direction of the position limiting component, a top surface of the second protrusion is higher than a bottom surface corresponding to the groove wall of the wiring groove, and the enamel wire passing through the wiring groove is supported by the top surface of the second protrusion or is higher than the top surface of the second protrusion.

[0007] The fluid drive device of the present invention includes a stator unit, a position limiting part, and at least one type of conductive part, the conductive part being positioned relative to the position limiting part or being fixed, the conductive part including a first connecting end and a second connecting end, the first connecting end being electrically connected to the stator unit and the second connecting end being a pin end when electrically connected to an external power source, the conductive part enabling the stator unit to be electrically connected to an external power source, a portion of the conductive part being fitted into the position limiting part, and the position limiting part being an injected part. Using the above method, by pulling out the second connection end of the stator unit, the second connection end becomes a pin of an external power source, and the position limiting part limits the position of the conductive part, resulting in a simple structure and simplifying the assembly process of the fluid drive device. [Brief description of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view of a fluid drive unit according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a three-dimensional view of the stator unit, the position limiting parts, and the conductive parts of FIG. 1 assembled together. [Diagram 3] 2 is an exploded structural view of a stator unit, a position limiting component, and a conductive component in the first embodiment of FIG. 1. [Figure 4] 2 is a three-dimensional view of an assembled position limiting component and a conductive component in the first embodiment of FIG. 1. [Diagram 5] 5 is a three-dimensional view of the conductive parts in FIG. 4 . [Figure 6] FIG. 6 is a three-dimensional view of the first conductive part in FIG. 5 . [Figure 7] FIG. 7 is a three-dimensional view of the second part in FIG. 6. [Figure 8] FIG. 6 is a three-dimensional view of the second conductive part in FIG. 5 . [Figure 9] FIG. 6 is a three-dimensional view in one direction of the position limiting part and the second part of FIG. 5 assembled together. [Figure 10] 6 is a three-dimensional view of the position limiting part and the second part of FIG. 5 assembled in another direction. [Figure 11] FIG. 2 is a structural diagram of a conductive component according to a second embodiment of FIG. 1; [Figure 12] 1. FIG. 4 is a structural diagram of the conductive parts and the position limiting parts in the second embodiment of FIG. 1 in one direction after assembly. [Figure 13] 1. FIG. 4 is a structural diagram of the conductive parts and the position limiting parts in the second embodiment of FIG. 1 in another assembled direction. [Figure 14] FIG. 4 is a cross-sectional view of a fluid drive unit according to a second embodiment of the present invention. [Figure 15] 15 is a structural diagram of the first embodiment of FIG. 14 in which the first housing, the position limiting component, and the conductive component are assembled. [Figure 16] 16 is a structural diagram of an assembled first housing, a position limiting component, and a second portion in the first embodiment of FIG. 15. [Figure 17] 15 is a structural diagram of an assembled first housing, a position limiting component, and a conductive component in the second embodiment of FIG. 14. [Figure 18] 18 is a cross-sectional view of the first housing, the position limiting component, and the conductive component in FIG. 17 in an assembled state. [Figure 19] FIG. 4 is a three-dimensional view of a conductive component according to a third embodiment of the present invention shown in FIG. [Figure 20] FIG. 20 is a three-dimensional view of the first conductive part in FIG. [Figure 21] 21 is a three-dimensional view of the first portion in FIG. 20 in one direction. [Figure 22] 21 is a three-dimensional view of the first portion in FIG. 20 in another direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present invention will be further described below with reference to the figures and specific examples.

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail in conjunction with the drawings. First, directional terms such as up, down, left, right, front, rear, inside, outside, top, bottom, etc. in this specification are defined with respect to the structures shown in each figure, and since they are relative concepts, they may change accordingly according to different positions and different usage conditions. Thus, these or other directional terms should not be construed as limiting.

[0011] In the following embodiments, the fluid drive unit can provide fluid power for the working medium of the automobile thermal management system, and the working medium can be water or an aqueous solution, for example, an aqueous solution containing 50% ethylene glycol, and the working medium can also be other substances.

[0012] Referring to FIG. 1, a fluid drive unit 100 includes a housing, a rotor unit 1, a stator unit 2, a shaft 3, and an isolating portion 4, and the rotor unit 1 is fitted onto the outer periphery of the shaft 3. Further, the fluid drive unit 100 includes an internal chamber, and the isolation section 4 divides the internal chamber into a first chamber 80 and a second chamber 90, the first chamber 80 allows the working medium to flow, and the second chamber 90 does not directly contact the working medium, the rotor unit 1 is located in the first chamber 80, and the stator unit 2 is located in the second chamber 80. Referring to FIG. 1, the stator unit 2 includes a stator core 21, an insulating holder 23, and a winding 22. This insulating holder 23 is coated on at least a portion of the surface of the stator core 21, the windings 22 are wound around the insulating holder 23, and the rotor unit 1 includes a permanent magnet 11 and an impeller unit 12. When the fluid drive device 100 is operating, the excitation magnetic field generated by the stator unit 2 is further controlled by controlling the current flowing through the windings 22 of the stator unit 2, and the rotor unit 1 rotates around or together with the axis 3 due to the action of the excitation magnetic field.

[0013] Referring to FIG. 1, the fluid actuator 100 further includes a position limiting component 5 and a conductive component 6 . This conductive part 6 is arranged in a position-limiting manner relative to the position-limiting part 5 or is fixed in place, and the part of the position-limiting part 5 that comes into contact with the conductive part 6 is not conductive. Thus, when the fluid drive device is operating, this helps to prevent the current that has passed through the conductive part 6 from leaking from the position-limiting part 5. In this embodiment, the stator unit 2 and the position limiting component 5 are arranged along the axial direction of the fluid drive device. Specifically, the stator unit 2 is closer to the impeller unit 12 than the position limiting part 5, i.e., the stator unit 2 is located between the position limiting part 5 and the impeller unit 12, and the position limiting part 5 may be located between the stator unit 2 and the impeller unit 12. Referring to FIG. 1, the housing includes a first housing 7, and the fluid drive device further includes a connection insert 71. In this embodiment, the connecting insertion portion 71 is integral with the first housing 7 . Specifically, this connection insertion portion 71 is arranged to protrude from the surface of the first housing 7, the opening of the connection insertion portion 71 faces along the axial direction of the fluid drive unit 100, and the connection insertion portion 71, the position limiting part 5, and the stator unit 2 are arranged along the axial direction of the fluid drive unit 100. This connection insertion portion 71 has an accommodation chamber 710, and a part of the conductive part 6 is located in the accommodation chamber 710. By providing this connection insertion portion 71, an interface of an external power supply can enter the accommodation chamber 710 and be electrically connected to the conductive part 6.

[0014] The above contents will be introduced in detail below.

[0015] FIG. 1 is a structural diagram of a fluid drive unit in a first embodiment of the present invention, and FIG. 4 is a structural diagram of the assembled position limiting components and conductive components in the first embodiment of FIG. 1. The fluid drive unit of the first embodiment will be introduced in detail below.

[0016] 2 and 3, the insulating holder 23 includes at least two positioning posts 231, and the positioning posts 231 are distributed along the circumferential direction of the insulating holder 23. The position limiting part 5 includes positioning holes 51, and the number of the positioning holes 51 is at least the same as the number of the positioning posts 231. Specifically, in this embodiment, the number of the positioning holes 51 and the number of the positioning posts 231 are five, and each positioning post 231 passes through a corresponding positioning hole 51, and each positioning post 231 is engaged with a corresponding positioning hole 51. As a result, the position of the position limiting component 5 is limited in the circumferential direction. Specifically, in this embodiment, each positioning pillar 231 is a gap fit into the corresponding positioning hole 51, and referring to Figures 2 to 3, one end of the positioning pillar 231 protrudes from the positioning hole 51, and the protruding end of the positioning pillar 231 is heat-stakingly fastened to the position limiting part 5, thereby fixedly connecting the position limiting part 5 to the stator unit 2. 2 and 3, the position limiting component 5 further includes at least one openwork portion 52, which penetrates the upper and lower surfaces of the position limiting component 5. Thus, by providing the openwork portion 52, the weight of the position limiting part 5 is reduced, and the amount of material used in the injection process of the position limiting part 5 is reduced, thereby contributing to cost reduction.

[0017] 2 to 5, the conductive part 6 includes a first connection end and a second connection end, the first connection end being electrically connected to the stator unit 2, and the second connection end being capable of serving as a pin end when electrically connected to an interface of an external power supply. The conductive part 6 enables the stator unit 2 to be electrically connected to the interface of an external power supply, and contributes to drawing out the conductive end of the stator unit 2. As a result, the pulled-out conductive end can be used as an interface pin for an external power supply, and the conductive part 6 is positioned relative to the position limiting part 5, which makes assembly convenient and contributes to simplifying the process. The above content will be introduced in detail below.

[0018] 2 to 5, the fluid drive unit 100 in this embodiment includes a first conductive part 61, a first connection end 611 of the first conductive part 61 is electrically connected to the winding 22 in the stator unit 2, and a second connection end 612 of the first conductive part 61 is a power pin end of an external interface. Specifically, in this embodiment, the fluid drive unit 100 includes three first conductive parts 61. The second connection ends 612 of the three first conductive parts 61 are respectively the U-phase pin end, the V-phase pin end and the W-phase pin end of the external interface, and the second connection ends 612 of the three first conductive parts 61 are arranged in parallel. The second connection ends 612 of the three first conductive parts 61 may also be arranged in series, and the specific arrangement positions can be adaptively designed according to the interface of the external power supply. In addition, in this embodiment, the winding 22 in the stator unit 2 is a three-phase winding, and the number of first conductive parts 61 is the same as the number of phases of the winding, and when the winding 22 in the stator unit 2 is a single-phase winding, the number of first conductive parts 61 may be two. 2 and 4, the fluid drive device 100 further includes a second conductive part 62, a first connecting end 621 of which is in conductive contact with the stator core 21 in the stator unit 2, and a second connecting end 622 of which is a ground pin end of the interface with the external power supply, thus contributing to dissipating static electricity on the surface of the stator core 21, and further contributing to preventing static electricity from affecting the performance of the fluid drive device. Specifically, referring to Figures 2 and 3, in this embodiment, the stator core 21 includes a recess 211 which is recessed from the outer peripheral surface of the stator core 21, and the first connecting end 621 of the second conductive part 62 enters the chamber of the recess 211 and contacts the stator core at the side wall portion of the recess 211. From the above description, the fluid drive unit 100 in this embodiment includes a first conductive part and a second conductive part, the first conductive part being the power pin end of the interface for the external power supply, and the second conductive part being the ground pin end of the external interface. Furthermore, this fluid drive unit 100 may include only the first conductive component. In this case, the first conductive component can be the power pin end of the interface of the external power supply, that is, there is no need to separately provide a second conductive component as the ground pin end of the interface of the external power supply. Below, we will introduce in detail an example in which the fluid drive unit 100 includes the first conductive component and the second conductive component.

[0019] 6, the first conductive component 61 includes a first portion 613 and a second portion 614, and in this embodiment, the first portion 613 and the second portion 614 are provided separately. Here, "provided separately" means that the first portion 613 and the second portion 614 are each processed to be two independent parts. The first portion 613 and the second portion 614 may be of an integral structure. For specific details, see the first conductive component in the second embodiment below, and no further details will be given here. Referring to Figure 6, the first connecting end 611 of the first conductive part 61 is located at the first end of the first part 613, and the second connecting end 612 of the first conductive part 61 is located at the first end of the second part 614, and the central axis L1 of the first connecting end 611 of the first conductive part 61 and the central axis L2 of the second connecting end 612 of the first conductive part 61 are parallel to each other, and the central axis L1 of the first connecting end 611 of the first conductive part 61 and the central axis L2 of the second connecting end 612 of the first conductive part 61 both extend along the axial direction of the fluid drive device. Specifically, in this embodiment, the central axis L1 of the first connecting end 611 of the first conductive part 61 and the central axis L2 of the second connecting end 612 of the first conductive part 61 are both parallel to the central axis of the fluid drive unit. The term "parallel" here refers to theoretical parallelism. In reality, there may be errors in the manufacturing and assembly processes. All parallelism errors arising from manufacturing and assembly are within the scope of protection of the present invention.

[0020] Referring to Figure 7, the second end of the second portion 614 has a connection hole 6140 which is a through hole, and referring also to Figure 6, the second end of the first portion 613 enters the connection hole 6140 and is in close contact with the second portion 614, which allows the first portion 613 to come into contact with the second portion 614 and further enables electrical conduction between the first portion 613 and the second portion 614.

[0021] 6 and 7, in this embodiment, the molding process of the second part 614 includes a bending process, and by providing this bending process, the second connecting end 612 of the first conductive part 61 can be arranged according to a predetermined direction. Specifically, in this embodiment, the second portion 614 includes two folds, and of course, may be adaptively designed to be folded once or multiple times according to the actual position of the external connection insertion port. Specifically, referring to FIG. 7 , the second portion 614 further includes a first straight section 615, a second flat section 616 and a first vertical section 617, one end of the second flat section 616 is transitionally connected or directly connected to the first straight section 615 via an arc, the other end of the second flat section 616 is transitionally connected or directly connected to the first vertical section 617 via an arc, and the second connecting end 612 is located at the end of the first vertical section 617 in the extension direction. 6 and 7, the first straight section 615 and the second flat section 616 are located in the same plane, and in this embodiment, the first straight section 615 is arranged perpendicular to the second flat section 616, the first vertical section 617 is arranged perpendicular to the second flat section 616, and the first vertical section 617 is arranged perpendicular to the first straight section 615. The "vertical" described above is a theoretical vertical, and there may be errors in the actual manufacturing and assembly processes. Any errors in the verticality caused by the manufacturing and assembly are within the scope of protection of the present invention. In this embodiment, the first straight section 615 is arranged perpendicular to the second straight section 616, and the first vertical section 617 is arranged perpendicular to the first straight section 615, and the first straight section 615 and the second flat section 616 may be arranged at other angles, and the first vertical section 617 and the first straight section 615 may be arranged at other angles. Also, referring to FIG. 7, in this embodiment, the thickness of the second connection end 612 is smaller than the thickness of the first vertical section 617, and the thickness of the second connection end 612 may be greater than or equal to the thickness of the first vertical section 617, and the specific thickness parameters can be adaptively designed according to the interface of the external power supply. The following describes the two-fold process of the second portion 614, in which the first fold is between the first straight section 614 and the second flat section 616, and the second fold is between the second flat section 616 and the first vertical section 617, where the first fold and the second fold do not indicate the order of folding. Referring to FIG. 8, the second conductive part 62 in this embodiment has a one-piece structure, and the term "one-piece structure" here refers to the second conductive part 62 being processed into one part; of course, the second conductive part 62 may also be provided as a separate piece. That is, the second conductive part 62 may be integrally assembled from two or more parts. Referring to FIG. 8 , the first end of the second conductive part 62 is the first connecting end 621 of the second conductive part 62, and the second end of the second conductive part 62 is the second connecting end 622 of the second conductive part 62, and the first connecting end 621 of the second conductive part 62 has a convex protrusion shape. 2, the first connecting end 621 is provided so as to protrude in a direction closer to the stator core. Referring to FIGS. 1, 2 and 8 combined, an outer wall 6211 of the protruding portion of the first connecting end 621 of the second conductive part 62 protrudes and contacts the stator core 21, an end of an inner wall 6212 of the protruding portion of the first connecting end 621 of the second conductive part 62 contacts the inner wall of the chamber of the first housing 7 in FIG. 1, and the inner wall of the chamber of the first housing 7 generates an acting force on the first connecting end 621 of the second conductive part 62, thereby enabling the first connecting end 621 of the second conductive part 62 to come into contact with the stator core 21, which further contributes to improving the reliability of contact between the first connecting end 621 of the second conductive part 62 and the stator core 21. In this embodiment, the first connecting end 621 of the second conductive part 62 has a protruding shape, and the first connecting end 621 of the second conductive part 62 may have a bent shape.

[0022] Referring to FIG. 8, similarly, the molding process of the second conductive part 62 also includes a bending process, and by providing the bending process, the first connecting end 621 of the second conductive part 62 can be provided according to a predetermined direction. Specifically, the second portion 614 in this embodiment includes three folds, and may be adaptively designed to have one fold, or two or more folds according to the actual position of the external connection insertion port. Specifically, referring to FIG. 8 , the second conductive part 62 includes a first section 625, a second section 626 and a third section 627, the first section 625 is closer to the first connecting section 621 of the second conductive part than the second section 626, the first connecting section 621 of the second conductive part is located at the end of the first section 625 in the extending direction, the second connecting end 622 of the second conductive part 62 is located at the end of the third section 627 in the extending direction, one end of the second section 626 is transition-connected or directly connected to the first section 625 via an arc, the other end of the second section 626 is transition-connected or directly connected to the third section 627 via an arc, the first section 625 and the second section 626 are arranged at an angle, and the third section 627 and the second section 626 are arranged at an angle. The folding process of the second part is described below, in which the first fold is the fold between the first section 625 and the second section 626, the second fold is the fold between the second section 626 and the third section 627, and the third fold is the fold of the first connecting section 621 of the second conductive part, where the first fold, the second fold, and the third fold do not indicate a forward and backward folding order.

[0023] 9 and 10, in this embodiment, the position limiting part 5 is formed by injection molding using the second part 614 and the second conductive part 62 as an insert. Specifically, referring to FIGS. 4, 9, and 10, the position limiting part 5 includes a main body portion 53. In this embodiment, the first connecting end 611 of the first conductive part 61 is located on one side of the main body portion 53, and the second connecting end 612 of the first conductive part 61 is located on the other side of the main body portion 53, and the side on which the first connecting end 611 of the first conductive part 61 is located and the side on which the second connecting end 612 of the first conductive part 61 is located are different sides of the main body portion 53. Specifically, in this embodiment, the first connection end 611 of the first conductive part 61 is located on the upper side of the main body part 53, and the second connection end 612 of the first conductive part 61 is located on the lower side of the main body part 53, and the side on which the first connection end 611 of the first conductive part 61 is located and the side on which the second connection end 612 of the first conductive part 61 is located may be located on the same side of the main body part 53, and the specific relative positional relationship between the two may be adaptively designed depending on the position of the interface of the external power supply. Referring to Figure 4, in this embodiment, the first connection end 621 of the second conductive part 62 is located on one side of the main body 53, and the second connection end 622 of the second conductive part 62 is located on the other side of the main body 53, the side on which the first connection end 621 of the second conductive part 62 is located and the side on which the first connection end 611 of the first conductive part 61 is located are on the same side of the main body 53, and the side on which the second connection end 622 of the second conductive part 62 is located and the side on which the second connection end 612 of the first conductive part 61 is located are on the same side of the main body 53. In this embodiment, the fluid drive system includes a first conductive part and a second conductive part as an example. If the fluid drive system only includes the first conductive part, the second part 614 can be injected as an insert.

[0024] 10, the position limiting part 5 further includes a reinforcing part 54, which is provided so as to protrude from the main body part 53 of the position limiting part 5, and a part of the second part 614 is embedded in the reinforcing part 54 and the main body part 53. In this embodiment, by providing the reinforcing part 54 locally on the position limiting part 5, a part of the second part 614 can be embedded in the reinforcing part 54 and the main body part 53, thus contributing to an increase in the connection length between the second part 614 and the position limiting part 5, and further contributing to an improvement in the connection strength between the second part 614 and the position limiting part 5. On the other hand, if the overall thickness of the position limiting part 5 is not increased relatively, a method of improving the connection strength between the second part 614 and the position limiting part 5 by providing a reinforcing part 54 locally on the position limiting part 5 may be used to relatively reduce the weight of the position limiting part 5 and further contribute to cost savings. Of course, if the cost factor is not a consideration, the overall thickness of the position limiting part 5 may be increased to improve the connection strength between the second part 614 and the position limiting part 5.

[0025] 7 to 10, the first straight section 615, the second flat section 616, and the second section 626 of the second conductive part 62 are in contact with and attached to the main body portion 53 of the position limiting part 5, and the position limiting part 5 further includes at least one first protrusion portion 55, which protrudes from the surface of the main body portion 53. In this embodiment, the position limiting part 5 includes a plurality of first protrusions 55, a first root portion of the first protrusions 55 is connected to the main body part 53, a second root portion of at least one of the first protrusions 55 is pressed against the first straight section 615 of the first conductive part 61, a second root portion of at least one of the protrusions is pressed against the second flat section 616, and a second root portion of at least one of the protrusions is pressed against the second section 626 of the second conductive part, thereby contributing to preventing the first straight section 615, the second flat section 616 of the first conductive part 61, and the second section 626 of the second conductive part 62 from coming off the main body part 53, and further, the first straight section 615, the second flat section 616 of the first conductive part 61, and the second section 626 of the second conductive part 62 are further positionally limited in the axial direction of the fluid drive device. In this embodiment, the first protrusion 55 is formed by injection molding, and the first protrusion 55 is not conductive. In this way, when the fluid drive unit operates, the current flowing through the first conductive part 61 and the current flowing through the second conductive part 62 contribute to preventing leakage through the first protrusion 55.

[0026] 9, in this embodiment, the first straight stage 615 and the second flat stage 616 of the first conductive part 61 and the second stage 626 of the second conductive part 62 are fitted into the main body 53, and the upper surfaces of the first straight stage 615, the second flat stage 616 of the first conductive part 61 and the second stage 626 of the second conductive part 62 are flush with the upper surface of the main body 53. The upper surfaces of the first straight stage 615, the second flat stage 616 of the first conductive part 61 and the second stage 626 of the second conductive part 62 are at least partially exposed. In this way, during the injection process, the exposed upper surfaces of the first straight stage 615, the second flat stage 616 and the second stage 626 of the second conductive part 62 may be used as positioning reference surfaces.

[0027] 4 and 9, the position limiting component 5 further includes a plurality of second protrusions 56, which protrude from the upper surface of the main body 53. 4, the first connecting end 611 includes a wiring groove 6111. Referring to FIG. 4, for convenience of description, the enamel wire 221 is diagrammatically drawn passing through the wiring groove. The enamel wire 221 corresponding to the winding 22 of the stator unit 2 in FIG. 1 can pass through the wiring groove 6111. The enamel wire 221 located in the wiring groove 6111 is in contact with and electrically connected to the corresponding groove wall of the wiring groove 6111. The top surface 563 of the second protrusion 56 is higher than the bottom surface 6112 corresponding to the groove wall of the wiring groove 6111. The enamel wire 221 passing through the wiring groove 6111 is supported by the top surface 563 of the second protrusion 56, or the enamel wire 221 passing through the wiring groove 6111 is higher than the top surface 563 of the second protrusion 56. In this way, the distance that the enamel wire 221 in the wiring groove 6111 falls downward during use of the fluid drive unit can be limited. Referring to FIG. 4, in this embodiment, the radial size of the bottom of the wiring groove 611 is larger than the radial size of the enamel wire 221. If the enamel wire 221 in the wiring groove 6111 falls into the chamber at the bottom of the wiring groove 6111, the enamel wire 221 will not come into contact with the first connecting end 611, and electrical continuity may not be achieved. In this embodiment, the provision of the second protrusion 56 helps to prevent the enamel wire 221 in the wiring groove 6111 from falling into the chamber at the bottom of the wiring groove 6111, thereby contributing to improving the reliability of the electrical connection between the enamel wire 221 and the first connecting end 611. Specifically, referring to Figures 4 and 9, in this embodiment, some of the second protrusions 56 are located on one side of the first connection end 611, and some of the second protrusions 56 are located on the other side of the first connection end 611. For convenience of description herein, the second protrusion located on one side of the first connecting end 611 is defined as the second main protrusion 561, and the second protrusion located on the other side of the first connecting end 611 is defined as the second sub-protrusion 562. The second main protrusion 561 and the second sub-protrusion 562 are arranged in parallel, and the second main protrusion 561, the first connecting end 611, and the second sub-protrusion 562 are distributed along the radial direction of the position limiting part 5. By using the above method, a protrusion is provided on each side of the first connecting end 611, so that both ends of the enamel wire passing through the wiring groove 6111 can be supported on the top surface of the corresponding protrusion, or both ends of the enamel wire passing through the wiring groove 6111 are higher than the top surface of the corresponding protrusion. In this embodiment, one protrusion is provided on each side of the first connecting end 611, and at least one protrusion may be provided on only one side of the first connecting end 611. 11 is a structural diagram of a conductive part in the second embodiment of FIG. 1, and FIG. 12 is a structural diagram of an assembled conductive part and position limiting part in the second embodiment of FIG. The conductive component of the second embodiment will be described in detail below.

[0028] Referring to FIG. 11, in this embodiment, the first conductive part 61a includes a first portion 613a and a second portion 614a, and the first portion 613a and the second portion 614a are of an integral structure. The term "integral structure" here means that the first portion 613a and the second portion 614a are processed or manufactured into one part, the first portion 613a is perpendicular to the first straight section 615a of the second portion 614a, and the first portion 613a is located at one end of the first straight section 615a of the second portion 614a. In this embodiment, the structure of the second conductive part 62a can be referred to the second conductive part in the first embodiment, and will not be described in detail here.

[0029] 12 and 13, the position limiting component 5a in this embodiment is formed by injection molding using a first conductive component 61a and a second conductive component 62a as inserts.

[0030] Compared with the conductive parts of the first embodiment, the first part 613a and the second part 614a in this embodiment have an integral structure, and the position limiting part 5a is formed by injection molding using the first conductive part 61a and the second conductive part 62a as inserts. In this manner, the formed position limiting part 5a can be assembled with the stator unit. In this way, the number of assembly steps can be relatively reduced, which contributes to simplifying the assembly process and further contributes to improving the assembly efficiency of the fluid drive system. In this embodiment, other structural features of the position limiting part 5a can be referred to the first embodiment of the position limiting part, and will not be described in detail here.

[0031] FIG. 14 is a structural diagram of a fluid drive unit according to a second embodiment of the present invention, and FIG. 15 is a structural diagram of an assembled first housing, position limiting components, and conductive components in the first embodiment of FIG. The fluid drive unit according to the second embodiment of the present invention will be described in detail below.

[0032] 14 to 16, the position limiting component 5' and the first housing 7' in this embodiment have an integral structure. 14 to 16, the conductive part 6' includes a first conductive part 61' and a second conductive part 62', one end of the first conductive part 61' is electrically connected to the winding 22 in the stator unit 2, the other end of the first conductive part 61' is a power pin end of the external interface, one end of the second conductive part 62' is in contact with the stator core 21 in the stator unit 2, and the other end of the second conductive part 62' is a ground pin end of the external interface. The provision of the second conductive part contributes to dissipating static electricity on the surface of the stator core 21, and further contributes to preventing static electricity from affecting the performance of the fluid drive device.

[0033] 15 and 16, a first conductive component 61' includes a first portion 613' and a second portion 614', and the first portion 613' and the second portion 614' are separate structures. The position limiting part 5' in this embodiment is injection molded using the second portion 614' and the second conductive part 62' as an insert, and here, with regard to the structure of the first conductive part 61', reference can be made to the structure of the first conductive part in the first embodiment of the fluid drive device described above, and no further details will be given here.

[0034] Compared to the fluid drive unit of the first embodiment of the present invention, the position limiting part 5' and the first housing 7' in this embodiment have an integral structure, and thus the position limiting part 5' does not need to be provided separately, which makes the structure of the fluid drive unit simpler and the assembly easier. For other structural features of the position limiting part 5' and the conductive part 6' in this embodiment, reference can be made to the conductive part and position limiting part of the fluid drive unit of the first embodiment, and no detailed description will be given here.

[0035] FIG. 17 is a structural diagram of the second embodiment of FIG. 14 in which the first housing, the position limiting component, and the conductive component are assembled. The assembly of the first housing, the position limiting components, and the conductive components in the second embodiment of FIG. 14 will be described in detail below.

[0036] 17 and 18, the position limiting component 5' in this embodiment is formed by injection molding using the conductive component 6a' as an insert, and the position limiting component 5' and the first housing 7' are integral with each other. 17 and 18, the conductive part 6a' includes a first conductive part 61a' and a second conductive part 62a', and the first conductive part 61a' includes a first portion 613a' and a second portion 614a', and these first portion 613a' and second portion 614a' have an integral structure. In this context, "integral structure" refers to the first portion 613a' and the second portion 614a' being machined or manufactured into one part.

[0037] Compared to the fluid drive unit of the first embodiment, in this embodiment, the position limiting component 5' and the first housing 7' are integrally formed, and it is not necessary to provide the position limiting component 5' separately. This makes the structure of the fluid drive system simpler and assembly easier, and for other structural features of the position limiting part 5' and the conductive part 6' in this embodiment, reference can be made to the conductive parts and position limiting parts of the fluid drive system in the first embodiment, and no detailed description will be given here.

[0038] FIG. 19 is a three-dimensional view of the conductive part in the third embodiment of FIG. 1, which will be described in detail below.

[0039] 19 and 20, the conductive part 6b includes a first conductive part 61b and a second conductive part 62b, and in this embodiment, the first conductive part 61b includes a first portion 613b and a second portion 614b. The first portion 613b and the second portion 614b have separate structures. Here, "separate structure" refers to the first portion 613b and the second portion 614b being processed into two independent parts, and the structure of the second conductive part 62b in this embodiment can be referred to the second conductive part in the first embodiment, and will not be described in detail here.

[0040] 21 and 22, in this embodiment, the second portion 614b has a connection hole 6140b which is a through hole. Referring to FIG. 20, the second end of the first portion 613b enters into the connection hole 6140b and is in close contact with the connection hole 6140b, which allows the first portion 613b to come into contact with the second portion 614b and further enables electrical conduction between the first portion 613b and the second portion 614b. Here, the term "close contact" refers to a tight connection between the two parts achieved by an interference fit or an intermediate fit.

[0041] 21 and 22, in this embodiment, the second portion 614b includes a body portion 6141b and a protrusion portion 6142b. This protrusion portion 6142b is arranged to protrude from the lower surface of the main body portion 6141b, surrounding the connection hole 6140b, and along the thickness direction of the second portion 614b, the connection hole 6140b penetrates the upper surface of the main body portion 6141b and the lower surface 6143b of the protrusion portion 6142b, and in this embodiment, the thickness of the main body portion 6141b is 1.5 mm or less, and the thickness of the protrusion portion 6142b is 0.5 mm or less. In this embodiment, the protrusion 6142b is formed by performing a flanging process on the connection hole. Before the flanging process is performed, the diameter of the connection hole 6140b is smaller than the actual required diameter, and the flanging process increases the diameter of the connection hole and forms it into a protrusion. In this way, it is possible to avoid increasing the thickness of the main body portion, and at the same time, the flanging process contributes to increasing the height of the connection hole, and further contributes to improving the engagement height with the connection hole 6140b of the first portion 613b. Furthermore, by increasing the extension height of the connection hole 6140b through the flanging process, the thickness of the main body portion 6141b can be reduced, contributing to reducing the production cost of the second portion 614b.

[0042] The above examples do not limit the present invention. Although the present specification has described the present invention in detail with reference to the above examples, the present invention may be modified or altered, and any improvements that do not depart from the spirit and scope of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A fluid drive device including a stator unit, a position limiting component, and a conductive component, the conductive part is provided so as to be positionally limited or fixed to the position limiting part, The conductive part includes a first connection end and a second connection end, the first connection end is electrically connected to the stator unit, the second connection end serves as a pin end when electrically connected to an external power source of the fluid drive device; the stator unit is electrically connectable to an external power source of the fluid drive unit by the conductive part, a portion of the conductive part is fitted into the position limiting part, the position limiting component is an injection component; The fluid drive unit has an internal chamber, the stator unit and the position limiting component are located in the inner chamber, The stator unit and the position limiting component are arranged along the axial direction of the fluid drive unit, The stator unit is fixedly connected to the position limiting component, The position limiting component includes a main body portion, The first connection end is located on one side of the main body portion, The second connection end is located on one side of the main body portion, a side on which the first connection end is located and a side on which the second connection end is located are different sides of the main body, The first connection end is located on an upper side of the main body portion, The second connection end is located below the main body portion, The insulating holder of the stator unit includes at least two positioning posts; The positioning posts are distributed along the circumferential direction of the insulating holder of the stator unit; The position limiting component includes at least two positioning holes, Each of the positioning posts passes through a corresponding one of the positioning holes, Each of the positioning posts is provided in engagement with a corresponding one of the positioning holes; One end of the positioning post protrudes from the positioning hole, and the position limiting component is fixedly connected to the stator unit by heat staking the protruding end of the positioning post; The position limiting component includes at least one second protrusion, The second protrusion is provided to protrude from an upper surface of the main body, the second protrusion is located on one side of the first connection end, the first connection end includes a wiring groove; an enamel wire corresponding to a winding of the stator unit can pass through the wiring groove; The enamel wire located in the wiring groove is in contact with and electrically connected to a corresponding groove wall of the wiring groove; The second protrusions and the first connecting ends are distributed along a radial direction of the position limiting component, a top surface of the second protrusion portion is higher than a bottom surface of the wiring groove corresponding to a groove wall of the wiring groove; The fluid drive unit according to claim 1, wherein the enamel wire passing through the wiring groove is supported by the top surface of the second protrusion or is higher than the top surface of the second protrusion.

2. The fluid drive unit includes a first housing, The fluid drive unit according to claim 1 , wherein the position limiting component is integral with the first housing.

3. The position limiting component includes at least one first protrusion, The first protrusion is provided to protrude from a surface of the main body, a first base portion of the first protrusion portion is connected to the main body portion; 2. The fluid drive unit according to claim 1, wherein the second base portion of the first protrusion is pressed against a part of a surface of the conductive part.

4. The conductive part includes a first conductive part, a first connection end of the first conductive component electrically connected to a winding in the stator unit; 4. The fluid drive unit according to claim 1, wherein the second connection end of the first conductive part is a power pin end of an external interface.

5. the conductive part includes a first conductive part and a second conductive part; a first connection end of the first conductive component electrically connected to a winding in the stator unit; a second connection end of the first conductive part is a power supply pin end of an external power supply of the fluid drive unit; a first connection end of the second conductive part contacting a stator core of the stator unit; 4. The fluid drive unit according to claim 1, wherein the second connection end of the second conductive part is a ground pin end of an external power supply of the fluid drive unit.

6. the first conductive component includes a first portion and a second portion; the first connection end is located at one end of the first portion, the second connection end is located at one end of the second portion, 5. The fluid drive unit according to claim 4, wherein a central axis of the first connection end and a central axis of the second connection end extend along an axial direction of the fluid drive unit.

7. the first portion and the second portion are integral with each other; the position limiting component is formed by injection molding using the first conductive component as an insert, the first conductive part includes a first straight section, a second straight section, and a first vertical section; the first straight stage and the second straight stage are bonded to a main body of the position limiting component in contact with each other, one end of the second straight stage is connected to one end of the first straight stage, and the other end of the second straight stage is connected to the first vertical stage; The first straight stage is provided perpendicular to the second straight stage, The first vertical stage is provided perpendicular to the first straight stage, the first portion is located at an end of the first straight stage, the first portion is perpendicular to the first straight stage, The fluid drive unit according to claim 6 , wherein the second connection end is located at an end of the first vertical stage in the extending direction.

8. The first portion and the second portion are provided separately, the position limiting component is formed by injection molding using the second portion as an insert, a second end of the second portion having a connection hole; 7. The fluid drive unit according to claim 6, wherein the second end of the first portion enters the connection hole and is in close contact with the second portion.

9. The second portion includes a body portion and a protrusion portion. the protrusion is provided to surround the connection hole and protrude from the lower surface of the main body, 9. The fluid drive unit according to claim 8, wherein the connection hole penetrates the upper surface of the main body and the lower surface of the protrusion along the thickness direction of the second portion.

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