Three-phase motor stator outgoing line connection structure and connection method

Abstract

The invention relates to the technical field of three-phase motors, in particular to a three-phase motor stator outgoing line connection structure and method, the connection structure comprises a stator end busbar, a control end busbar and a laminated wire holder, the stator end busbar comprises a first injection molding frame and a three-phase electrode plate arranged on the first injection molding frame; the control end busbar comprises a second injection molding frame and a three-phase electrode plate arranged on the second injection molding frame; the laminated wire holder comprises a wire injection molding seat and a three-phase connecting sheet laminated on the wire injection molding seat. The two ends of the three-phase connecting sheet are correspondingly connected with the three-phase electrode sheet of the stator end busbar and the three-phase electrode sheet of the control end busbar respectively. According to the invention, the connecting sheets of all phases are laminated on the wiring injection molding seat and are mutually insulated, so that the occupied space can be saved, the wire outlet connecting structures all adopt a hard connection mode, the high cost of using materials such as braided wires is reduced, and the wire outlet connecting structure can be conveniently mounted on an integrated shell in a narrow space to connect the wire outlet end of a motor stator winding coil and an electric control module.

Description

Technical Field

[0001] The present invention relates to the technical field of three-phase motors, and specifically refers to a connection structure and connection method for the stator outgoing line of a three-phase motor. Background Art

[0002] At present, the trend of electric vehicles is towards stronger electric drive performance and more compact electric drive structures. The electric drive structure often uses a three-phase motor, and the three-phase motor is connected to an electronic control module through a connecting conductor passing through a current sensor. In the existing motor, the stator is arranged inside an integrated housing on one side of the differential half shaft. In order to avoid the installation position of the differential half shaft, the installation space for the connecting conductor is narrow, making it inconvenient to install the connecting conductor. Summary of the Invention

[0003] The main object of the present invention is to solve the deficiencies of the above background art, and provide a connection structure and connection method for the stator outgoing line of a three-phase motor that is convenient to install in a narrow space.

[0004] The technical solution adopted by the present invention is: a connection structure for the stator outgoing line of a three-phase motor, including,

[0005] A stator terminal busbar, the stator terminal busbar includes a first injection molding frame and U-phase electrode plate Ua, V-phase electrode plate Va, and W-phase electrode plate Wa provided on the first injection molding frame and respectively used to correspondingly connect the stator winding coils;

[0006] A control terminal busbar, the control terminal busbar includes a second injection molding frame and U-phase electrode plate Ub, V-phase electrode plate Vb, and W-phase electrode plate Wb provided on the second injection molding frame;

[0007] A laminated wiring seat, the laminated wiring seat includes a wiring injection molding seat and U-phase connection pieces, V-phase connection pieces, and W-phase connection pieces laminated on the wiring injection molding seat. The two ends of each of the U-phase connection piece, V-phase connection piece, and W-phase connection piece respectively correspond to connect the U-phase electrode plates (Ua, Ub), V-phase electrode plates (Va, Vb), and W-phase electrode plates (Wa, Wb) of the stator terminal busbar and the control terminal busbar.

[0008] Further, on the wiring injection molding seat, first grooves, second grooves, and third grooves with both sides open are respectively provided at one end of each phase connection piece for respectively bolting each phase connection piece to the corresponding phase electrode plate of the stator terminal busbar or the control terminal busbar; one end of each of the U-phase connection piece, V-phase connection piece, and W-phase connection piece is respectively inserted into the first groove, second groove, and third groove to form first cavities, second cavities, and third cavities with one side open, and the second cavity is located between two adjacent connection pieces.

[0009] Further, the first cavity, the second cavity, and the third cavity are all used for installing nuts; one end of the U-phase connecting piece is provided with a first connection hole located in the first groove; one end of the V-phase connecting piece is provided with a second connection hole located in the second groove; one end of the W-phase connecting piece is provided with a third connection hole located in the third groove.

[0010] Further, the second cavity is located between the U-phase connecting piece and the V-phase connecting piece, and the third cavity is located between the V-phase connecting piece and the W-phase connecting piece.

[0011] Further, the V-phase connecting piece includes a U-shaped section and a second connecting plate provided with the second connection hole at one end of the U-shaped arm. The third cavity is located within the U-shaped structure of the V-phase connecting piece, and the second cavity is located below the second connecting plate.

[0012] Further, the U-phase connecting piece includes a U-shaped section and a first connecting plate provided with the first connection hole at one end of the U-shaped arm. The second cavity and the third cavity are both located within the U-shaped structure of the U-phase connecting piece, and the first cavity is located below the first connecting plate.

[0013] Further, the wiring injection mold base has an L-shaped structure, and the first groove, the second groove, and the third groove are spacedly arranged on one side of the wiring injection mold base; each phase connecting piece is arranged on one side of the wiring injection mold base, and one end directly extends out of the wiring injection mold base laterally or extends along the other side of the L-shape of the wiring injection mold base and then extends out of the wiring injection mold base laterally.

[0014] Further, the V-phase connecting piece includes a horizontal section and a vertical section v with one end connected to the horizontal section. The horizontal section includes the second connecting plate and the U-shaped section; the other end of the vertical section v extends horizontally continuously, making the V-phase connecting piece in a Z-shaped structure.

[0015] Further, the W-phase connecting piece includes a third connecting plate located in the third cavity and a vertical section w. One end of the third connecting plate is bent and then connected to one end of the vertical section w, and the other end of the vertical section w extends horizontally continuously, making the W-phase connecting piece in a Z-shaped structure.

[0016] Further, both ends of the U-phase electrode piece Ub, the V-phase electrode piece Vb, and the W-phase electrode piece Wb are provided with mounting holes, and one end of each extends in the Y direction to form an L-shaped structure.

[0017] Further, the U-phase electrode piece Ub, the V-phase electrode piece Vb, and the W-phase electrode piece Wb are all arranged in the Z direction, and one end of each is bent in the Y direction and then passes through the current sensor to connect to the electronic control module.

[0018] Further, a claw mechanism is provided on the first injection mold frame for clamping onto the bus bar of the motor stator.

[0019] Further, the jaw mechanism includes two elastic clamping plates and a stabilizing plate connecting the two elastic clamping plates; clamping protrusions are provided on the opposite sides of the ends of the clamping plates extending out of the stabilizing plate.

[0020] Further, the stabilizing plate abuts against the bus bar when the elastic clamping plates clamp the bus bar.

[0021] Further, a plurality of clamping grooves for coupling the outgoing wire ends of the stator winding coils are provided on each of the U-phase electrode plate Ua, V-phase electrode plate Va, and W-phase electrode plate Wa.

[0022] Further, the V-phase electrode plate Va includes a conductor convex ring and side plates provided on the convex ring. A plurality of clamping grooves for coupling the outgoing wire ends of the stator winding coils are provided on the side plates; the first injection molding frame is fixedly connected to the convex ring and is provided with nuts located below the convex ring; when the V-phase connecting piece is provided on the convex ring, it is bolted and connected through bolts and the nuts below the convex ring, and there is a gap between it and the side plates.

[0023] On the other hand, the present invention also provides a method for connecting the outgoing wires of a three-phase motor stator. Using a three-phase motor stator outgoing wire connection structure provided by the present invention, the connection method includes,

[0024] Connecting the U-phase electrode plate Ua, V-phase electrode plate Va, and W-phase electrode plate Wa of the stator terminal bus bar to the outgoing wire ends of the stator winding coils;

[0025] Connecting one end of each of the U-phase connecting piece, V-phase connecting piece, and W-phase connecting piece of the laminated wiring base to the U-phase electrode plate Ua, V-phase electrode plate Va, and W-phase electrode plate Wa respectively;

[0026] Placing nuts in the first cavity, second cavity, and third cavity respectively. Inserting the U-phase electrode plate Ub, V-phase electrode plate Vb, and W-phase electrode plate Wb of the control terminal bus bar into the first slot, second slot, and third slot respectively from one side, and using screws to pass through the U-phase connecting piece and the U-phase electrode plate Ub from the other side of the first slot and bolt them to the nuts.

[0027] According to a method for connecting the outgoing wires of a three-phase motor stator provided by the present invention, the step of connecting the U-phase electrode plate Ua, V-phase electrode plate Va, and W-phase electrode plate Wa of the stator terminal bus bar to the outgoing wire ends of the stator winding coils includes,

[0028] Using a jaw structure to clamp the first injection molding frame on the bus bar of the motor stator, and clamping the outgoing wire ends of the stator winding coils in the corresponding clamping grooves of each phase electrode plate for welding connection.

[0029] According to a method for connecting the outgoing wires of a three-phase motor stator provided by the present invention, it further includes connecting each phase electrode plate of the control terminal bus bar through a current sensor to an electronic control module.

[0030] The beneficial effects of the present invention include: 1. Each phase electrode plate of the stator terminal busbar can be connected to the stator winding coil, each phase electrode plate of the control terminal busbar can be used to connect to the electronic control module, and each phase connection plate on the laminated wiring seat can connect the corresponding phase electrode plates of the stator terminal busbar and the control terminal busbar. The laminated arrangement of each phase connection plate on the wiring injection molding seat and mutual insulation can save occupied space. The outgoing line connection structure all adopts a hard connection method, reducing the high cost of using materials such as braided wires, and also facilitating the installation of the outgoing line ends of the motor stator winding coil and the electronic control module on the integrated housing in a narrow space;

[0031] 2. Through the first slot, the second slot and the third slot, the corresponding phase electrode plates of the stator terminal busbar or the control terminal busbar can be inserted from one side to contact each phase connection plate, and the first cavity, the second cavity and the third cavity can be used to bolt-connect each phase connection plate and the corresponding phase electrode plate;

[0032] 3. Nuts can be installed through the first cavity, the second cavity and the third cavity. With the connection holes correspondingly provided on each phase connection plate, it is convenient to bolt-connect each phase connection plate and the corresponding phase electrode plate through the connection holes with bolts;

[0033] 4. The U-shaped structure of the V-phase connection plate is convenient for fitting the third cavity and laminating with the W-phase connection plate. The second cavity is located under the second connecting plate to facilitate bolt-connecting a corresponding V-phase electrode plate. This design can save the thickness space of the laminated wiring seat and is convenient for installation in a narrow space;

[0034] 5. The wiring injection molding seat is L-shaped, and each phase connection plate is arranged on one side of the wiring injection molding seat and directly extends laterally or extends laterally along the L-shaped direction, which is convenient for connecting to the electronic control module arranged above the side of the stator winding coil;

[0035] 6. The horizontal section, the vertical section and their extended sections are such that the V-phase connection plate is in a Z-shaped structure, which is convenient for installation in the narrow space reserved in the integrated housing for avoiding the installation position of the differential half shaft;

[0036] 7. Each phase electrode plate of the control terminal busbar is bent along the Y direction into an L-shaped structure, which is convenient for passing through the current sensor to connect to the electronic control module, and the operation is simple;

[0037] 8. The claw mechanism can be clamped on the busbar, enhancing the fixing effect of the stator terminal busbar. When the bolt is tightened, the torque received by the first injection molding frame is distributed to the busbar of the stator, thereby avoiding the deformation of the stator winding coil welded on each phase connection plate (Ua, Va, Wa);

[0038] 9. The claw mechanism has a simple structure. The clamping protrusions on the two elastic clamping plates can be used to clamp the busbar, and the stability of the elastic clamping plates can be improved through the stabilizing plate to avoid shaking after clamping;

[0039] 10. Multiple clamping grooves are provided on the electrode plates of each phase of the stator terminal busbar, which facilitates coupling the outgoing ends of the stator winding coils and then performing welding connections.

[0040] 11. A gap is provided between the V-phase connecting piece and the side plate of the V-phase electrode plate Va through the convex ring, avoiding poor contact caused by welding slag generated when the side plate welds the outgoing ends of the stator winding coils.

[0041] 12. A three-phase motor stator outgoing line connection method provided by the present invention makes full use of the structural characteristics of the three-phase motor stator outgoing line connection structure provided by the present invention. By laminating the connecting pieces of each phase into a laminated connection seat, the occupied space is reduced. By placing nuts on one side of each cavity of the wiring injection molding seat and using screws or bolts on the other side of each groove for bolt connection, the outgoing ends of the three-phase motor stator winding coils and the control terminal busbar can be quickly connected.

[0042] The connecting pieces of each phase of the present invention are laminated on the wiring injection molding seat and are insulated from each other, which can save the occupied space. The outgoing line connection structure entirely adopts a hard connection method, reducing the high cost of using materials such as braided wires, and also facilitating the installation in a narrow space on an integrated housing to connect the outgoing ends of the motor stator winding coils and the electronic control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 : Three-dimensional structure schematic diagram of the outgoing line connection structure of the present invention connecting the motor stator and the electronic control module;

[0044] Figure 2 : Front view structure schematic diagram of the outgoing line connection structure of the present invention connecting the motor stator and the electronic control module;

[0045] Figure 3 : For Figure 1 Schematic diagram with the structure of the integrated housing hidden;

[0046] Figure 4 : Top view structure schematic diagram of the outgoing line connection structure of the present invention connecting the motor stator and the electronic control module;

[0047] Figure 5 : Three-dimensional structure schematic diagram of the outgoing line connection structure connecting the motor stator;

[0048] Figure 6 : Front view structure schematic diagram of the outgoing line connection structure connecting the motor stator

[0049] Figure 7 : Structure schematic diagram of the stator terminal busbar connecting the motor stator;

[0050] Figure 8 : A three-dimensional structure schematic diagram of the stator terminal busbar;

[0051] Figure 9: Front view structural schematic diagram of the stator terminal busbar;

[0052] Figure 10 : Three-dimensional structural schematic diagram of the stator terminal busbar from another perspective;

[0053] Figure 11 : Schematic diagram of the V-phase electrode plate of the stator terminal busbar in the connected state;

[0054] Figure 12 : Three-dimensional schematic diagram of the stator terminal busbar clamping the busbar;

[0055] Figure 13 : Three-dimensional structural schematic diagram of the stacked wiring base;

[0056] Figure 14 : Structural schematic diagram of the stacked wiring base from one perspective;

[0057] Figure 15 : Schematic diagram of the stacked arrangement of the phase connection plates of the stacked wiring base;

[0058] Figure 16 : Schematic diagram of the phase connection plates of the stacked wiring base from one perspective;

[0059] Figure 17 : Three-dimensional structural schematic diagram of the control terminal busbar;

[0060] Figure 18 : Structural schematic diagram of the control terminal busbar from one perspective;

[0061] Wherein: 1 - stator terminal busbar; 1.1 - claw mechanism; 1.11 - elastic clamping plate; 1.12 - stabilizing plate; 1.2 - clamping groove; 1.3 - convex ring; 1.4 - first injection molding frame; 1.5 - side plate; 2 - stacked wiring base; 2.1 - U-phase connection plate; 2.11 - first connection plate; 2.2 - V-phase connection plate; 2.21 - second connection plate; 2.3 - W-phase connection plate; 2.31 - third connection plate; 2.4 - wiring injection molding seat; 2.5 - first groove; 2.51 - first cavity; 2.6 - second groove; 2.61 - second cavity; 2.7 - third groove; 2.71 - third cavity; 3 - control terminal busbar; 3.4 - second injection molding frame; 3.5 - nut bushing; 4 - motor stator; 6 - busbar; 7 - integrated housing; 8 - electronic control module; 9 - current sensor; Ua - U-phase electrode plate of the stator terminal busbar; Va - V-phase electrode plate of the stator terminal busbar; Wa - W-phase electrode plate of the stator terminal busbar; Ub - U-phase electrode plate of the control terminal busbar; Vb - V-phase electrode plate of the control terminal busbar; Wb - W-phase electrode plate of the control terminal busbar. Detailed implementation manners

[0062] Embodiments of the present invention will be described in detail below, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and the drawings are not drawn to scale and are intended to explain the present invention and should not be construed as limiting the present invention.

[0063] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0064] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0065] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] The motor stator 4 is arranged inside the integrated housing 7 on one side of the differential half shaft. The current sensor 9 is arranged on one side of the electronic control module 8Y and above one side (X - direction side) of the motor stator 4. In order to avoid the installation position of the differential half shaft, the Z - direction and X - direction installation spaces for the connecting conductors in the integrated housing 7 are narrow, making it inconvenient to install the connecting conductors.

[0067] The present invention relates to a three - phase motor stator 4 outgoing line connection structure for installing at the outgoing line ends of the stator winding coils of a three - phase motor to connect to the electronic control module 8. The phase electrode plates (Ua, Va, Wa) of the stator terminal busbar 1 can be connected to the stator winding coils, the phase electrode plates (Ub, Vb, Wb) of the control terminal busbar 3 can be used to connect to the electronic control module 8, and the phase connecting pieces (2.1, 2.2, 2.3) on the laminated wiring base 2 can connect the corresponding phase electrode plates of the stator terminal busbar 1 and the control terminal busbar 3. The phase connecting pieces (2.1, 2.2, 2.3) are laminated on the wiring injection - molded base 2.4 and are insulated from each other, which can save the occupied space. The outgoing line connection structure all adopts a hard - connection method, reducing the high cost of using materials such as braided wires, and also facilitating installation in a narrow space on the integrated housing 7 to connect the outgoing line ends of the motor stator 4 winding coils and the electronic control module 8.

[0068] A connection structure for the outgoing lines of a three-phase motor stator 4. Specifically, as Figures 1-18 shown, it includes a stator terminal busbar 1, a control terminal busbar 3, and a laminated wiring seat 2. The stator terminal busbar 1 includes a first injection molding frame 1.4 and U-phase electrode plates Ua, V-phase electrode plates Va, and W-phase electrode plates Wa provided on the first injection molding frame 1.4 and respectively used for correspondingly connecting the stator winding coils; the control terminal busbar 3 includes a second injection molding frame.34 and U-phase electrode plates Ub, V-phase electrode plates Vb, and W-phase electrode plates Wb provided on the second injection molding frame.34; the laminated wiring seat 2 includes a wiring injection molding seat 2.4 and U-phase connection pieces 2.1, V-phase connection pieces 2.2, and W-phase connection pieces 2.3 laminated on the wiring injection molding seat 2.4. The two ends of each of the U-phase connection piece 2.1, V-phase connection piece 2.2, and W-phase connection piece 2.3 are respectively correspondingly connected to the U-phase electrode plates (Ua, Ub), V-phase electrode plates (Va, Vb), and W-phase electrode plates (Wa, Wb) of the stator terminal busbar 1 and the control terminal busbar 3, that is, the two ends of the U-phase connection piece 2.1 are respectively connected to the U-phase electrode plate Ua and the U-phase electrode plate Ub, the two ends of the V-phase connection piece 2.2 are respectively connected to the V-phase electrode plate Va and the V-phase electrode plate Vb, and the two ends of the W-phase connection piece 2.3 are respectively connected to the W-phase electrode plate Wa and the W-phase electrode plate Wb; both the wiring injection molding seat 2.4 and the second injection molding frame.34 can be bolted to the integrated housing 7 through nut bushings 3.5.

[0069] In a certain embodiment, as Figures 13-16As shown in the figure, on the wiring injection molding base 2.4, at one end of each phase connection piece (2.1, 2.2, 2.3), there are respectively a first groove 2.5, a second groove 2.6, and a third groove 2.7 with openings on both sides, which are used to bolt each phase connection piece (2.1, 2.2, 2.3) (U-phase connection piece 2.1, V-phase connection piece 2.2, W-phase connection piece 2.3) to the corresponding phase electrode pieces (Ua, Va, Wa or Ub, Vb, Wb) of the stator end busbar 1 or the control end busbar 3; One end of each of the U-phase connection piece 2.1, V-phase connection piece 2.2, and W-phase connection piece 2.3 is respectively inserted into the first groove 2.5, the second groove 2.6, and the third groove 2.7 to form a first cavity 2.51, a second cavity 2.61, and a third cavity 2.71 with an opening on one side. The second cavity 2.61 is located between two adjacent connection pieces, that is, the second cavity 2.61 is located between the U-phase connection piece 2.1 and the V-phase connection piece 2.2, or between the V-phase connection piece 2.2 and the W-phase connection piece 2.3. In a specific solution, the first groove 2.5, the second groove 2.6, and the third groove 2.7 are used to bolt each phase connection piece (2.1, 2.2, 2.3) to the corresponding phase electrode pieces (Ub, Vb, Wb) of the control end busbar 3, and have openings on both sides in the Z direction and the Y direction. The Z-direction side of the first cavity 2.51, the second cavity 2.61, and the third cavity 2.71 has an opening, which is convenient for bolting and connecting each phase connection piece (2.1, 2.2, 2.3) to each phase electrode piece (Ub, Vb, Wb) in the Y direction.

[0070] Based on the fact that the wiring injection molding base 2.4 is provided with a first groove 2.5, a second groove 2.6, and a third groove 2.7, as Figures 13-15 shown, the first cavity 2.51, the second cavity 2.61, and the third cavity 2.71 are all used for installing nuts; The nuts can be installed on the wiring injection molding base 2.4 through nut bushings 3.5; One end of the U-phase connection piece 2.1 is provided with a first connection hole located in the first groove 2.5; One end of the V-phase connection piece 2.2 is provided with a second connection hole located in the second groove 2.6; One end of the W-phase connection piece 2.3 is provided with a third connection hole located in the third groove 2.7; One end of the U-phase electrode piece Ub, V-phase electrode piece Vb, and W-phase electrode piece Wb of the control end busbar 3 is provided with a mounting hole; During use, install a nut in the first cavity 2.51, insert one end of the U-phase electrode piece Ub into the first groove 2.5 from the Z direction, and use a bolt or nut to pass through the mounting hole of the U-phase electrode piece Ub and the first connection hole and thread it onto the nut in the first cavity 2.51. Bolt the V-phase electrode piece Vb and the V-phase connection piece 2.2, and the W-phase electrode piece Wb and the W-phase connection piece 2.3 in this way.

[0071] In a certain preferred solution, as Figure 15As shown, the second cavity 2.61 is located between the U-phase connection piece 2.1 and the V-phase connection piece 2.2 arranged in a stacked manner, and the third cavity 2.71 is located between the V-phase connection piece 2.2 and the W-phase connection piece 2.3 arranged in a stacked manner; the first cavity 2.51 is located below the U-phase connection piece 2.1. This design can reduce the space of the stacked terminal block 2 in the Z direction.

[0072] Based on the fact that the wiring injection mold base 2.4 is provided with a first groove 2.5, a second groove 2.6 and a third groove 2.7, as Figures 13-16 shown, the V-phase connection piece 2.2 includes a U-shaped section and a second connecting plate 2.21 provided with a second connecting hole at one end of the U-shaped arm. The third cavity 2.71 is located within the U-shaped structure of the V-phase connection piece 2.2, and the second cavity 2.61 is located below the second connecting plate 2.21 (in the Y direction). Preferably, the U-phase connection piece 2.1 also includes a U-shaped section and a first connecting plate 2.11 provided with a first connecting hole at one end of the U-shaped arm. Both the second cavity 2.61 and the third cavity 2.71 are located within the U-shaped structure of the U-phase connection piece 2.1, and the first cavity 2.51 is located below the first connecting plate 2.11 (in the Y direction); one end of the W-phase connection piece 2.3 is provided with a third connecting plate 2.31 located in the third cavity 2.7 formed by the third groove 2.71 and the wiring injection mold base 2.4. This design can design the three cavities in the same X direction, that is, the heights of the three cavities in the Y direction are the same, saving the thickness (Y direction) space of the stacked terminal block 2 and facilitating installation in a narrow space.

[0073] In a further embodiment, a specific scheme of the stacked terminal block 2 is shown, as Figure 13 shown, the wiring injection mold base 2.4 is in an L-shaped structure, and the first groove 2.5, the second groove 2.6 and the third groove 2.7 are arranged at intervals on one side of the wiring injection mold base 2.4 (in the X direction); each phase connection piece (2.1, 2.2, 2.3) is stacked on one side of the wiring injection mold base 2.4 and one end directly extends out of the wiring injection mold base 2.4 or extends out of the wiring injection mold base 2.4 after extending along the other side (in the Z direction) of the L-shaped wiring injection mold base 2.4. The L-shaped wiring injection mold base 2.4 is adapted to be installed on the integrated housing 7 that avoids the installation position of the differential half shaft. Each phase connection piece (2.1, 2.2, 2.3) is arranged on one side of the wiring injection mold base 2.4 and directly extends out or extends out after extending along the L-shaped direction, facilitating connection to the electronic control module 8 arranged above the side of the stator winding coil.

[0074] In a specific embodiment, as Figure 15As shown, the V-phase connection piece 2.2 includes a horizontal section and a vertical section v with one end connected to the horizontal section. The horizontal section includes the second connection plate 2.21 and the above U-shaped section; the other end of the vertical section v extends horizontally (extension section) to make the V-phase connection piece 2.2 in a Z-shaped structure. Optionally, the U-phase connection piece 2.1 or the W-phase connection piece 2.3 has the same structure as the V-phase connection piece 2.2, and its U-shaped section and vertical section are both laminated designs, with different dimensions on the U-shaped section, vertical section and their extensions; the vertical section can be bent in the Y direction into a stepped structure and then extended horizontally at the end to facilitate the connection of the extension section to the stator end busbar 1.

[0075] In a specific solution, such as Figure 15 As shown, the W-phase connection piece 2.3 includes a third connection plate 2.31 located in the third cavity and a vertical section w. One end of the third connection plate 2.31 is bent (in the Y direction) and then connected to one end of the vertical section w, and the other end of the vertical section w extends horizontally to make the W-phase connection piece 2.3 in a Z-shaped structure.

[0076] In a certain specific solution, such as Figure 13 As shown, each phase connection piece (2.1, 2.2, 2.3) extends along the other side (Z direction) of the L-shaped of the wiring injection molding seat 2.4 and then extends out of the wiring injection molding seat 2.4. Each phase connection piece (2.1, 2.2, 2.3) is also laminated on the other side (Z direction) of the L-shaped, and after extending different lengths, it extends out of the L-shaped wiring injection molding seat 2.4; one end of the U-phase connection piece 2.1, V-phase connection piece 2.2 and W-phase connection piece 2.3 extending out of the wiring injection molding seat 2.4 are respectively provided with a first connection hole, a second connection hole and a third connection hole, which are convenient for bolted connection with the phase electrode plates (Ua, Va, Wa) of the stator end busbar 1.

[0077] In some embodiments, such as Figure 17 As shown, both ends of the U-phase electrode plate Ub, V-phase electrode plate Vb and W-phase electrode plate Wb are provided with mounting holes, and one end extends in the Y direction into an L-shaped structure. In a specific solution, the U-phase electrode plate Ub, V-phase electrode plate Vb and W-phase electrode plate Wb are all arranged in the Z direction and one end is bent in the Y direction (L-shaped) and then passes through the current sensor 9 to connect to the electronic control module 8. The control end busbar 3 directly passes through the current sensor 9 to connect to the electronic control module 8, and the electronic control module 8 can be used to control the current magnitude of the motor stator 4 to control the output power.

[0078] In some embodiments, such as Figure 7 and Figures 10-12As shown in the figure, a claw mechanism 1.1 is provided on the first injection molding frame 1.4 for clamping onto the bus bar 6 of the motor stator 4. By means of the claw mechanism 1.1, it can be clamped onto the bus bar 6, enhancing the fixing effect of the stator end bus bar 1. When the bolt is tightened, the torque received by the first injection molding frame 1.4 is distributed to the bus bar 6 of the stator, thereby preventing the stator winding coils welded to the respective connecting pieces (2.1, 2.2, 2.3) (Ua, Va, Wa) from being deformed due to the distributed torque.

[0079] Based on the fact that a claw mechanism 1.1 is provided on the first injection molding frame 1.4, as Figures 10-12 shown, the claw mechanism 1.1 includes two elastic clamping plates 1.11 and a stabilizing plate 1.12 connecting the two elastic clamping plates 1.11; on the opposite sides of the ends of the clamping plates extending out of the stabilizing plate 1.12, there are clamping protrusions. Optionally, multiple claw mechanisms 1.1 are provided on the first injection molding frame 1.4 to improve stability; more preferably, when the elastic clamping plates 1.11 clamp the bus bar 6, the stabilizing plate 1.12 abuts against the bus bar 6, and together with the clamping protrusions, they abut against the bus bar 6 on both sides of the bus bar 6, improving the stability of clamping the bus bar 6. The claw mechanism 1.1 has a simple structure. The clamping protrusions on the two elastic clamping plates 1.11 can be used to clamp the bus bar 6, and the stability of the elastic clamping plates 1.11 can be improved through the stabilizing plate 1.12, avoiding shaking after clamping.

[0080] In a certain preferred embodiment, as Figures 7-9 shown, the U-phase electrode plate Ua, V-phase electrode plate Va, and W-phase electrode plate Wa are all provided with a plurality of clamping grooves 1.2 for coupling the outgoing ends of the stator winding coils. During use, the outgoing ends of the stator winding coils are coupled and clamped in the clamping grooves 1.2 of the U-phase electrode plate Ua and then welded for connection, facilitating the fixation of the outgoing ends of the stator winding coils.

[0081] In a certain preferred embodiment, as Figure 7 and Figure 11 shown, the V-phase electrode plate Va includes a conductor convex ring 1.3 and side plates 1.5 provided on the convex ring 1.3. The side plates 1.5 are provided with a plurality of clamping grooves 1.2 for coupling the outgoing ends of the stator winding coils; the first injection molding frame 1.4 is fixedly connected to the convex ring 1.3 and is provided with a nut below the convex ring 1.3, and the nut can be a plastic-coated nut; when the V-phase connecting piece 2.2 is provided on the convex ring 1.3, it is bolted and connected through the bolt and the nut below the convex ring 1.3, and there is a gap between it and the side plates 1.5. When the side plates 1.5 of the V-phase electrode plate are welded to the outgoing ends of the stator winding coils, it is easy to generate welding slag, resulting in an uneven surface of the side plates 1.5. Without the convex ring 1.3, the connection between the V-phase connecting piece 2.2 and the side plates 1.5 may have poor contact due to the welding slag. The V-phase connecting piece 2.2 is placed on the convex ring 1.3 with a spacing from the side plates 1.5, which can eliminate the influence of the welding slag.

[0082] On the other hand, the present invention also provides a method for connecting the outgoing lines of a three-phase motor stator 4. Using the three-phase motor stator 4 outgoing line connection structure provided by the present invention, the connection method includes,

[0083] S1. Connect the U-phase electrode piece Ua, V-phase electrode piece Va, and W-phase electrode piece Wa of the stator terminal busbar 1 to the outgoing line ends of the stator winding coils;

[0084] S2. Connect one end of each of the U-phase connection piece 2.1, V-phase connection piece 2.2, and W-phase connection piece 2.3 of the laminated wiring base 2 to the U-phase electrode piece Ua, V-phase electrode piece Va, and W-phase electrode piece Wa respectively. First, the connection pieces (2.1, 2.2, 2.3) of each phase can be respectively placed on the corresponding electrode pieces (Ua, Va, Wa) of each phase. Bolt the wiring injection molding base 2.4 to the integrated housing 7, and then bolt the connection pieces (2.1, 2.2, 2.3) of each phase and the corresponding electrode pieces (Ua, Va, Wa) of each phase;

[0085] S3. Place nuts in the first cavity 2.51, second cavity 2.61, and third cavity 2.71 respectively. Insert the U-phase electrode piece Ub, V-phase electrode piece Vb, and W-phase electrode piece Wb of the control terminal busbar 3 into the first slot 2.5, second slot 2.6, and third slot 2.7 respectively from one side. Use screws to pass through the U-phase connection piece 2.1 and the U-phase electrode piece Ub from the other side (Y direction) of the first slot 2.5 and bolt them to the nut. This step can be followed to bolt the V-phase connection piece 2.2 and the V-phase electrode piece Vb in the second slot 2.6, and bolt the W-phase connection piece 2.3 and the W-phase electrode piece Wb in the third slot 2.7.

[0086] According to a method for connecting the outgoing lines of a three-phase motor stator 4 provided by the present invention, in step S1, connecting the U-phase electrode piece Ua, V-phase electrode piece Va, and W-phase electrode piece Wa of the stator terminal busbar 1 to the outgoing line ends of the stator winding coils includes,

[0087] S11. Use the claw structure to clamp the first injection molding frame 1.4 on the bus bar 6 of the motor stator 4, and clamp the outgoing line ends of the stator winding coils in the clamping grooves 1.2 of the corresponding electrode pieces (Ua, Va, Wa) for welding connection.

[0088] According to a method for connecting the outgoing lines of a three-phase motor stator 4 provided by the present invention, it also includes,

[0089] S4. Pass the electrode pieces (Ub, Vb, Wb) of each phase of the control terminal busbar 3 through the current sensor 9 and electrically connect them to the electronic control module 8. After bolting the second injection molding frame.34 to the integrated housing 7, the electrode pieces (Ub, Vb, Wb) of each phase can be bolted to the electronic control module 8.

[0090] During actual installation, the first injection molding frame 1.4 is clamped on the bus bar 6 of the motor stator 4 through a plurality of claw mechanisms 1.1, and the outgoing ends of the stator winding coils are correspondingly clamped in the clamping grooves 1.2 of each phase electrode plate (Ua, Va, Wa) for welding connection; the L-shaped ends of each phase electrode plate (Ub, Vb, Wb) of the control terminal bus bar 3 are passed through the current sensor 9 and bolted to the electronic control module 8; the second injection molding frame 1.34 is bolted to the integrated housing 7; plastic nuts are respectively placed in the first cavity 2.51, the second cavity 2.61 and the third cavity 2.71, and the laminated wiring seat 2 is moved so that each phase electrode plate (Ub, Vb, Wb) is correspondingly inserted into the first slot 2.5, the second slot 2.6 and the third slot 2.7, and one end of each phase connecting piece (2.1, 2.2, 2.3) is respectively placed on the convex ring 1.3 of the corresponding phase electrode plate (Ua, Va, Wa), and the wiring injection molding seat 2.4 is bolted to the integrated housing 7; each phase connecting piece (2.1, 2.2, 2.3) and the corresponding phase electrode plate (Ua, Va, Wa) are bolted and connected respectively by using bolts and the plastic nuts under the convex ring 1.3; each phase connecting piece (2.1, 2.2, 2.3) and the corresponding phase electrode plate (Ub, Vb, Wb) are bolted and connected respectively by using screws.

[0091] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase motor stator outgoing line connection structure, characterized in that: include, A stator end busbar, the stator end busbar comprising a first injection molding frame and a U-phase electrode sheet Ua, a V-phase electrode sheet Va and a W-phase electrode sheet Wa arranged on the first injection molding frame and respectively used for correspondingly connecting the stator winding coils; A control end busbar, the control end busbar comprising a second injection molding frame and a U-phase electrode sheet Ub, a V-phase electrode sheet Vb, and a W-phase electrode sheet Wb arranged on the second injection molding frame; The laminated wiring seat comprises a wiring injection molding seat and a U-phase connecting piece, a V-phase connecting piece, and a W-phase connecting piece stacked on the wiring injection molding seat, wherein the two ends of each of the U-phase connecting piece, the V-phase connecting piece, and the W-phase connecting piece correspond to the U-phase electrode piece (Ua, Ub), the V-phase electrode piece (Va, Vb), and the W-phase electrode piece (Wa, Wb) connected to the stator end busbar and the control end busbar.

2. A three-phase motor stator outgoing line connection structure as claimed in claim 1, characterized in that: The wiring injection molding seat is provided with a first groove, a second groove and a third groove, all of which are open on both sides, located at one end of each phase connecting plate, which are used to bolt each phase connecting plate to the electrode plates of each phase corresponding to the stator end busbar or the control end busbar; one end of the U-phase connecting plate, the V-phase connecting plate and the W-phase connecting plate are respectively inserted into the first groove, the second groove and the third groove to form a first cavity, a second cavity and a third cavity open on one side, and the second cavity is located between two adjacent connecting plates.

3. A three-phase motor stator outgoing line connection structure as claimed in claim 2, characterized in that: The first cavity, the second cavity and the third cavity are all used to install nuts; one end of the U-phase connecting plate is penetrated by a first connecting hole located in the first groove; one end of the V-phase connecting plate is penetrated by a second connecting hole located in the second groove; one end of the W-phase connecting plate is penetrated by a third connecting hole located in the third groove.

4. A three-phase motor stator outgoing line connection structure as claimed in claim 2, characterized in that: The V-phase connecting piece includes a U-shaped section and a second connecting plate located at one end of the U-shaped arm and provided with the second connecting hole. The third cavity is located in the U-shaped section structure of the V-phase connecting piece, and the second cavity is located under the second connecting plate.

5. A three-phase motor stator outgoing line connection structure as claimed in claim 4, characterized in that: The wiring injection molding seat has an L-shaped structure, and the first groove, the second groove and the third groove are arranged at intervals on one side of the wiring injection molding seat; each phase connecting piece is arranged on one side of the wiring injection molding seat and one end directly extends out of the wiring injection molding seat or extends along the other side of the L-shape of the wiring injection molding seat and then extends out of the wiring injection molding seat.

6. A three-phase motor stator outgoing line connection structure as claimed in claim 5, characterized in that: The V-phase connecting piece includes a horizontal section and a vertical section v with one end connected to the horizontal section, the horizontal section includes the second connecting plate and the U-shaped section; the other end of the vertical section v continues to extend in the horizontal direction so that the V-phase connecting piece has a Z-shaped structure.

7. A three-phase motor stator outgoing line connection structure according to any one of claims 1 to 6, characterized in that: The U-phase electrode sheet Ub, the V-phase electrode sheet Vb and the W-phase electrode sheet Wb are all arranged in the Z direction and one end of each of them is bent along the Y direction and then passes through the current sensor to connect to the electric control module.

8. A three-phase motor stator outgoing line connection structure according to any one of claims 1 to 6, characterized in that: The first injection molding frame is provided with a claw mechanism for clamping on the busbar of the motor stator.

9. A three-phase motor stator outgoing line connection structure as claimed in claim 8, characterized in that: The V-phase electrode sheet Va includes a conductor convex ring and a side plate arranged on the convex ring, and the side plate is provided with a plurality of clamping grooves for coupling the output ends of the stator winding coils; the first injection molding frame is fixedly connected to the convex ring and is provided with a nut located under the convex ring; when the V-phase connecting sheet is arranged on the convex ring, it is bolted and connected with the nut under the convex ring by bolts and a gap is provided with the side plate.

10. A method for connecting stator outgoing wires of a three-phase motor, characterized in that: Using the three-phase motor stator outgoing line connection structure as described in any one of claims 2 to 9, the connection method includes: Connect the U-phase electrode sheet Ua, the V-phase electrode sheet Va and the W-phase electrode sheet Wa of the stator-end busbar to the outgoing terminal of the stator winding coil; Connect one end of each of the U-phase connecting piece, the V-phase connecting piece and the W-phase connecting piece of the stacked terminal block to the U-phase electrode piece Ua, the V-phase electrode piece Va and the W-phase electrode piece Wa respectively; Put nuts into the first cavity, the second cavity and the third cavity, insert the U-phase electrode plate Ub, the V-phase electrode plate Vb and the W-phase electrode plate Wb of the control end busbar into the first slot, the second slot and the third slot respectively from one side, and use screws to pass through the U-phase connecting plate and the U-phase electrode plate Ub from the other side of the first slot and bolt them to the nuts.

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