Stator assembly of motor and motor

Abstract

The present invention discloses a stator assembly of a motor and the motor, comprising a stator core, a first insulating skeleton, a second insulating skeleton and a plurality of pressure welding terminals, wherein the first insulating skeleton is arranged at one end of the stator core in the axial direction, the second insulating skeleton is arranged at the other end of the stator core in the axial direction, a wiring board is arranged on the first insulating skeleton, a plurality of pressure welding terminals are arranged on the wiring board, a plurality of pressure welding terminals are integrally injection molded with the wiring board, and a plurality of pressure welding terminals include two symmetrically arranged arc-shaped first pressure welding terminals and a second pressure welding terminal arranged between the two first pressure welding terminals. The present invention has the advantages of reliable connection and high production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator assembly of a motor and a motor. Background Art

[0002] With the deepening of my country's reform and opening up and the development of social productivity, people's pace of life has accelerated, and the application of electric motors in life has become more and more extensive. Brushless DC motors are widely used in many fields such as electric bicycles because of their advantages such as no brushes and mechanical commutators, no need for deceleration devices, and low noise. The winding start end and winding end end of the stator winding of the traditional permanent magnet brushless DC motor are usually connected by leads, and tied to the stator winding by cotton thread or nylon thread, which makes the winding end space large, the binding time is long, and the production efficiency is low. On the other hand, the quality of the product is also difficult to guarantee, so it is necessary to improve the above problems. Summary of the invention

[0003] In order to solve the above technical problems, the present invention discloses a stator assembly of a motor and a motor, which adopts an integrally formed terminal block and multiple pressure-welded terminals to connect the two ends of copper wires of different phases, and has the advantages of high reliability and high production efficiency.

[0004] The present invention provides a stator assembly of a motor, comprising a stator core, a first insulating frame, a second insulating frame and a plurality of pressure welding terminals, wherein the first insulating frame is arranged at one axial end of the stator core, the second insulating frame is arranged at the other axial end of the stator core, a wiring board is arranged on the first insulating frame, a plurality of pressure welding terminals are arranged on the wiring board, the plurality of pressure welding terminals are integrally injection molded with the wiring board, and the plurality of pressure welding terminals include two symmetrically arranged arc-shaped first pressure welding terminals and a second pressure welding terminal arranged between the two first pressure welding terminals.

[0005] Furthermore, the stator core includes a plurality of stator teeth, a stator slot is provided between two adjacent stator teeth, and copper wires are wound around the plurality of stator teeth to form a winding.

[0006] Furthermore, a three-phase winding is wound around the stator teeth, and the three-phase winding is connected in a triangle manner.

[0007] Furthermore, each phase of the winding is respectively provided with a winding start end and a winding end end, and the winding start end and the winding end end of the winding are pressure-welded to a plurality of the pressure-welding terminals.

[0008] Furthermore, the wiring board is in a circular ring shape, and the wiring board is clamped with the first insulating frame.

[0009] Furthermore, the first pressure welding terminal comprises an arc-shaped bottom surface, one end of the bottom surface is provided with a first phase line fixing portion in a horizontal direction toward the outer circle, and the other end of the bottom surface is provided with a first phase line connecting portion in a horizontal direction toward the inner circle.

[0010] Furthermore, the second pressure welding terminal includes a connection surface, a second phase line fixing portion and a second phase line connecting portion, one end of the connection surface is connected to the second phase line fixing portion, and the other end of the connection surface is connected to the second phase line connecting portion.

[0011] Furthermore, the first phase line fixing portion and the second phase line fixing portion both include a first conducting slot and a second conducting slot arranged in parallel, and the first conducting slot and the second conducting slot are respectively used to fix the winding start end or the winding end end of different phase windings.

[0012] Furthermore, the number of the plurality of pressure welding terminals is three, and the length of the bottom surface of the first pressure welding terminal and the connecting surface of the second pressure welding terminal is set according to actual conditions.

[0013] The present invention also provides a motor, which comprises a rotor and a stator assembly of the motor.

[0014] Implementing the embodiments of the present invention has the following beneficial effects:

[0015] (1) The wiring board of the present invention is clamped on the first insulating frame, and a plurality of pressure-welded terminals are integrally formed with the wiring board, which occupies a small space and effectively reduces the size of the motor.

[0016] (2) The present invention uses pressure welding and the first and second conducting grooves arranged in parallel to fix the winding start ends or winding end ends of different phase windings, thereby ensuring the long-term reliability of conduction.

[0017] (3) Compared with the prior art, the present invention is easier to realize machine automated production, improve production efficiency, and thus effectively ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0019] Figure 1 It is an expanded structural diagram of the parts of the stator assembly of the present invention;

[0020] Figure 2 It is a three-phase winding connection diagram provided in Example 1 of the specification of the present invention;

[0021] Figure 3 is a structural diagram of a first pressure welding terminal 41a according to Embodiment 1 of the present invention;

[0022] Figure 4 is a structural diagram of the first pressure welding terminal 41b of embodiment 1 of the present invention;

[0023] Figure 5 4 is a structural diagram of the second pressure welding terminal of Example 1 of the present invention.

[0024] Among them, the figure marks correspond to: 1-stator core, 11-stator teeth, 12-stator slots, 2-first insulating skeleton, 3-second insulating skeleton, 4-pressure welding terminal, 41-first pressure welding terminal, 42-second pressure welding terminal, 43-first conduction slot, 44-second conduction slot, 411-bottom surface, 412-first phase line fixing part, 413-first phase line connecting part, 421-connecting surface, 422-second phase line fixing part, 423-second phase line connecting part, 5-copper wire. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0027] In addition, in the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] like Figure 1-5As shown, embodiment 1 of the present invention provides a stator assembly of a motor, including a stator core 1, a first insulating skeleton 2, a second insulating skeleton 3 and a plurality of pressure welding terminals 4, wherein the first insulating skeleton 2 is arranged at one axial end of the stator core 1, and the second insulating skeleton 3 is arranged at the other axial end of the stator core 1, a terminal block is arranged on the first insulating skeleton 2, and a plurality of pressure welding terminals 4 are arranged on the terminal block, and the plurality of pressure welding terminals 4 are integrally injection molded with the terminal block, and the plurality of pressure welding terminals 4 include two symmetrically arranged arc-shaped first pressure welding terminals 41 and a second pressure welding terminal 42 arranged between the two first pressure welding terminals 41.

[0030] Specifically, the stator core 1 includes a plurality of stator teeth 11, a stator slot 12 is provided between two adjacent stator teeth 11, the first insulating frame 2 and the second insulating frame 3 are fixed at both ends of the stator core 1 through the stator slot 12, and the first insulating frame 2 and the second insulating frame 3 can be used to limit the shape and arrangement position of the winding. Copper wire 5 is wound around the plurality of stator teeth 11 to form a winding (not shown in the figure). In some embodiments, the stator core 1 is formed by punching a plurality of electromagnetic steel plates into a specified shape and fixing them by riveting, welding, etc.

[0031] Specifically, a three-phase winding is wound on the stator teeth 11, and the three-phase winding is connected in a triangle. Specifically, each phase of the winding is provided with a winding start end and a winding end end, and the winding start end and the winding end end of the winding are pressure-welded to the plurality of pressure-welding terminals 4.

[0032] Specifically, the wiring board is annular, and the wiring board is snap-connected with the first insulating frame 2. In some embodiments, the first insulating frame 2 is provided with a plurality of buckles, and the second insulating frame 3 is provided with a slot corresponding to the buckles.

[0033] Specifically, the first pressure welding terminal 41 includes an arc-shaped bottom surface 411, one end of the bottom surface 411 is provided with a first phase line fixing portion 412 in the horizontal direction of the outer circle, and the other end of the bottom surface is provided with a first phase line connecting portion 413 in the horizontal direction of the inner circle. In practical applications, the first phase line connecting portion 413 is a protruding square or circular connecting piece. Specifically, the second pressure welding terminal 42 includes a connecting surface 421, a second phase line fixing portion 422 and a second phase line connecting portion 423, one end of the connecting surface 421 is connected to the second phase line fixing portion 422, and the other end of the connecting surface 421 is connected to the second phase line connecting portion 423. In practical applications, the first phase line connecting portion 413 and the second phase line connecting portion 423 are protruding square or circular connecting pieces. Specifically, the number of the plurality of pressure welding terminals 4 is three, and the lengths of the bottom surface 411 of the first pressure welding terminal 41 and the connecting surface 421 of the second pressure welding terminal 42 are set according to actual conditions.

[0034] Specifically, the first phase line fixing portion 412 and the second phase line fixing portion 422 each include a first conducting slot 43 and a second conducting slot 44 arranged in parallel, the first conducting slot 43 and the second conducting slot 44 are respectively used to fix the winding start end or the winding end end of different phase windings, in some embodiments, the first conducting slot 43 and the second conducting slot 44 are hook-shaped slots curled into an opening. In some embodiments, the first conducting slot 43 and the second conducting slot 44 can be separately arranged or connected together.

[0035] As an example, taking the stator core 1 in this embodiment as an example, the number of the stator slots 12 is twelve, and each phase winding of the stator is formed by coils of four slots connected in series, and each phase winding has a winding start end 6a, a winding end end 6b; a winding start end 6c, a winding end end 6d; a winding start end 6e, a winding end end 6f. When connected in a triangle manner, the winding start end in any phase and the winding end end of other phases are connected together to form a parallel line to form one phase. As a special case, such as Figure 2 As shown, the winding start end 6a and the winding end end 6f are connected in parallel to form a U phase; the winding start end 6c and the winding end end 6b are connected in parallel to form a V phase; the winding start end 6e and the winding end end 6d are connected in parallel to form a W phase. Of course, the number of the stator slots 12 can also be set to other numbers such as six, nine, fifteen, etc.

[0036] Preferably, in an embodiment of the present invention, the number of the pressure welding terminals 4 is 3, including two first pressure welding terminals 41 and one second pressure welding terminal 42, wherein the first pressure welding terminal 41 includes a first pressure welding terminal 41a and a first pressure welding terminal 41b symmetrically arranged therewith, and the winding start end 6a and the winding end end 6f of the copper wire 5 are respectively placed on the two conducting grooves of the first pressure welding terminal 41a; the winding start end 6c and the winding end end 6b of the copper wire 5 are respectively placed on the two conducting grooves of the first pressure welding terminal 41b; and the winding start end 6e and the winding end end 6d of the copper wire 5 are respectively placed on the two conducting grooves of the second pressure welding terminal 42. Then, the conducting groove is pressure welded to seal the open hook-shaped conducting groove into a closed shape. As a result, the winding start end and the winding end end of the copper wire 5 are respectively constrained by the conducting groove, and the insulation layer of the copper wire 5 is removed during the pressure welding process. As a result, the winding start end and the winding end end of each phase of the copper wire 5 become conductive. This type of pressure welding ensures long-term reliability of conduction.

[0037] The wiring board of the present invention is clamped on the first insulating frame, and a plurality of pressure welding terminals are integrally formed with the wiring board, which occupies a small space and effectively reduces the size of the motor. The winding start end or winding end end of the windings of different phases is fixed by pressure welding and the first and second conduction grooves arranged in parallel, which can ensure the long-term reliability of conduction. Compared with the prior art, it is easier to realize machine automation production, improve production efficiency, and effectively ensure the quality of the product.

[0038] Another embodiment of the present specification further provides a motor, which is provided with a rotor and the stator assembly provided above, wherein the rotor can rotate freely inside the stator.

[0039] An embodiment in the present specification also provides a motor vehicle, an electric scooter (E-Scooter), an electric kickboard, an electric bicycle or an electric motorcycle, wherein the above mechanism is equipped with the above-provided motor.

[0040] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modification, equivalent substitution, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator assembly of a motor, characterized in that: The invention comprises a stator core (1), a first insulating frame (2), a second insulating frame (3) and a plurality of pressure welding terminals (4), wherein the first insulating frame (2) is arranged at one axial end of the stator core (1), the second insulating frame (3) is arranged at the other axial end of the stator core (1), a wiring board is arranged on the first insulating frame (2), a plurality of pressure welding terminals (4) are arranged on the wiring board, the plurality of pressure welding terminals (4) are integrally injection-molded with the wiring board, the wiring board is annular, and the wiring board is clamped with the first insulating frame (2); The plurality of pressure welding terminals (4) include two symmetrically arranged arc-shaped first pressure welding terminals (41) and a second pressure welding terminal (42) arranged between the two first pressure welding terminals (41); The first pressure welding terminal (41) comprises an arc-shaped bottom surface (411), one end of the bottom surface (411) is provided with a first phase line fixing portion (412) in a horizontal direction toward the outer circle, and the other end of the bottom surface is provided with a first phase line connecting portion (413) in a horizontal direction toward the inner circle; The second pressure welding terminal (42) comprises a connection surface (421), a second phase line fixing portion (422) and a second phase line connecting portion (423), one end of the connection surface (421) being connected to the second phase line fixing portion (422), and the other end of the connection surface (421) being connected to the second phase line connecting portion (423); The first phase line fixing portion (412) and the second phase line fixing portion (422) both comprise a first conducting slot (43) and a second conducting slot (44) arranged in parallel, the first conducting slot (43) and the second conducting slot (44) being respectively used to fix the winding start end or the winding end end of different phase windings.

2. The stator assembly of a motor according to claim 1, characterized in that: The stator core (1) comprises a plurality of stator teeth (11), a stator slot (12) is provided between two adjacent stator teeth (11), and copper wires (5) are wound around the plurality of stator teeth (11) to form a winding.

3. The stator assembly of a motor according to claim 2, characterized in that: A three-phase winding is wound on the stator teeth (11), and the three-phase winding is connected in a triangle manner.

4. The stator assembly of a motor according to claim 2, characterized in that: Each phase of the winding is respectively provided with a winding start end and a winding end end, and the winding start end and the winding end end of the winding are pressure-welded to a plurality of pressure-welding terminals (4).

5. The stator assembly of a motor according to claim 1, characterized in that: The number of the plurality of pressure welding terminals (4) is three.

6. A motor, characterized in that: The motor comprises a rotor and a stator assembly of the motor according to any one of claims 1 to 5.

Images