Stator outgoing line structure, stator assembly and motor

Abstract

The stator leading-out wire structure is assembled on a stator coil and comprises a bottom box and a box cover which are mutually matched and connected, the bottom box and the box cover are matched to form an accommodating chamber, a wire harness assembly is arranged in the accommodating chamber and comprises a plurality of groups of wire harness terminals and leading-out wires which are mutually connected, and the wire harness terminals and the leading-out wires are arranged in the accommodating chamber. The wire harness terminal comprises a plugging part which is correspondingly plugged with an enameled wire terminal completed by the stator coil, and a connecting part which is circumferentially connected with the periphery of the outgoing line. The bottom box is provided with a limiting mechanism, the wire harness assembly is matched with the limiting mechanism, and the side, close to the inserting part, of the limiting mechanism can make contact with the end face of the connecting part, so that the connecting part transmits force to the contact face of the limiting mechanism and the connecting part. According to the utility model, the limiting mechanism for limiting and protecting the wire harness terminal is designed, so that the reliability of the motor outgoing line structure is improved, and the failure rate of the motor is reduced.

Description

Technical Field

[0001] This utility model relates to the field of external rotor direct drive motor technology, specifically to a stator lead wire structure, stator assembly and motor. Background Technology

[0002] External rotor direct-drive motors are high-efficiency, compact electric motors characterized by their external rotor position and direct load drive, playing a crucial role in numerous industrial applications. The stator lead structure, as a key component, is critical to the stable and reliable operation of the entire motor system.

[0003] Traditional stator lead wire structures use a design that combines a base box and a cover. Typically, the base box is first fixed to the stator coil assembly, then the motor wiring harness terminals are inserted into the corresponding enameled wire terminals, and finally the cover is fixed in place.

[0004] However, once the wire harness terminals are inserted into the corresponding enameled wire terminals, the connection is typically maintained by the retaining force within the terminal slot. This retaining force requires consideration of various factors during design, including the elasticity of the material, the dimensional tolerances of the wire harness terminals, and the force limits during insertion and removal. Because these forces are often limited, if the motor wire harness is subjected to a sudden pull or impact during use, the wire harness terminals can easily detach from the terminal slot.

[0005] Therefore, it is crucial to design a stator lead structure that can effectively limit the position of the wire harness terminals. Utility Model Content

[0006] The technical problem to be solved by this utility model is how to design a stator lead wire structure that effectively limits the position of the wire harness terminals.

[0007] In a first aspect, to solve the above-mentioned technical problems, this utility model provides a stator lead wire structure, assembled with a stator coil, comprising:

[0008] A bottom box and a cover are connected to each other, forming a receiving chamber. A wire harness assembly is provided in the receiving chamber. The wire harness assembly includes several sets of interconnected wire harness terminals and leads. The wire harness terminals include a plug-in part that corresponds to the enameled wire terminal of the stator coil and a connecting part that is circumferentially connected to the lead.

[0009] The bottom box is provided with a limiting mechanism. The wire harness assembly cooperates with the limiting mechanism. The side of the limiting mechanism near the plug can contact the end face of the connecting part, so that the connecting part transmits force to the contact surface between the limiting mechanism and the connecting part.

[0010] Furthermore, the limiting mechanism includes a plurality of snap-fit ​​protrusions corresponding to the wire harness assembly. Each snap-fit ​​protrusion has a slot, and the lead wire is placed in the slot. The side of the snap-fit ​​protrusion near the insertion part can contact the end face of the connection part.

[0011] Furthermore, the limiting mechanism also includes a plurality of limiting bosses, which are located on the side of the buckle boss away from the insertion part. The limiting bosses can limit the lead wire in a first direction and a second direction perpendicular to the extension direction of the lead wire, wherein the first direction is perpendicular to the second direction.

[0012] Furthermore, the box cover is provided with a plurality of pre-pressing bosses corresponding to the slots of the buckle bosses. The pre-pressing bosses cooperate with the slots to exert pressure on the lead wires placed in the slots.

[0013] Furthermore, the box cover is also provided with a clearance hole, which corresponds to the position of the limiting boss, so that part of the structure of the limiting boss is placed in the clearance hole.

[0014] Furthermore, the bottom box includes an integrally connected main body and a wire harness lead-out portion; the limiting mechanism and the wire harness terminal are located in the main body; the lead-out portions are locked and fixed by cable ties sequentially wrapped around a plurality of the lead-out wires and the wire harness lead-out portions.

[0015] Furthermore, the two side walls of the wire harness lead-out portion are provided with grooves, and the cable ties are sequentially wound around several of the lead-out wires and placed in the grooves.

[0016] Furthermore, the inner side of the bottom wall of the bottom box is provided with a first reinforcing rib, the first reinforcing rib is located at the wire harness lead-out part, and a plurality of the lead-out wires are arranged around the first reinforcing rib;

[0017] The bottom wall of the bottom box is provided with a second reinforcing rib, and the cable tie is sequentially wrapped around a plurality of the lead wires and the second reinforcing rib.

[0018] In a second aspect, this utility model provides a stator assembly, including a stator coil assembly, wherein the stator coil assembly includes an insulating frame and the stator lead wire structure, and the base box is fixed to the insulating frame.

[0019] A third aspect of this utility model is to provide an electric motor, including the aforementioned stator assembly.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In this embodiment of the invention, the plug-in portion of the wire harness terminal is plugged into the enameled wire terminal of the stator to achieve electrical connection. The lead wire cooperates with the limiting mechanism on the bottom box. When the lead wire is subjected to tensile force and instantaneous pulling, the radially upward end face of the connecting portion fixed to the outer periphery of the lead wire can abut against the side of the limiting mechanism, thereby transmitting the force to the contact surface between the limiting mechanism and the connecting portion, realizing force dispersion, and preventing the plug-in portion of the wire harness terminal from falling off the enameled wire terminal due to instantaneous external force pulling. This improves the reliability of the motor lead wire structure and reduces the occurrence of motor failure rate. Attached Figure Description

[0022] Figure 1 This is a completed stator drawing disclosed in an embodiment of the present utility model;

[0023] Figure 2 This is an exploded view of the completed stator disclosed in an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the assembly of the wire harness terminal and the enameled wire terminal disclosed in an embodiment of the present utility model;

[0025] Figure 4 This is a front view of the bottom box disclosed in an embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the back of the bottom box disclosed in an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the box lid disclosed in an embodiment of the present utility model;

[0028] Figure 7 This is a schematic diagram of the pre-compression of the lead wire by the pre-compression boss disclosed in an embodiment of the present utility model;

[0029] Figure 8 This is a schematic diagram of the working state of the cable tie as disclosed in the embodiment of this utility model.

[0030] In the picture:

[0031] 000, Stator coil completed; 001, Enamelled wire terminal; 002, Enamelled wire;

[0032] 100. Base box;

[0033] 110. Main body; 111. Snap-fit ​​boss; 112. Limiting boss;

[0034] 120. Wire harness lead-out part; 121. Groove; 122. Cable tie; 123. First reinforcing rib; 124. Second reinforcing rib;

[0035] 200. Box lid; 201. Pre-compression boss; 202. Clearance hole;

[0036] 300. Wiring harness assembly;

[0037] 310. Wire harness terminal; 311. Plug-in part; 312. Connecting part;

[0038] 320. Lead wire. Detailed Implementation

[0039] To make the technical solutions and effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0040] The first aspect of this utility model is to provide a stator lead wire structure for effectively limiting and protecting the wire harness terminal 310, thereby preventing the wire harness terminal 310 from easily falling out of the terminal slot when the motor wire harness is subjected to a large instantaneous tensile force.

[0041] The stator lead wire structure provided by this utility model is assembled on the stator coil assembly 000, mainly including a box with a receiving chamber and a wire harness assembly 300.

[0042] First, the wire harness assembly 300 disclosed in this embodiment will be described.

[0043] Please see Figure 3 The wire harness assembly 300 includes interconnected wire harness terminals 310 and lead wires 320. Each wire harness terminal 310 has a plug-in portion 311 that corresponds to and plugs into an enameled wire terminal 001, and a connecting portion 312 that is circumferentially connected to the lead wire 320. The enameled wire terminal 001 holds an enameled wire 002, and the plug-in portion 311 plugs into the enameled wire terminal plug-in 001 to contact the enameled wire 002, thus achieving an electrical connection.

[0044] Next, the housing disclosed in the embodiment will be described.

[0045] Please see Figure 1-2 The housing can accommodate the wiring harness assembly 300 and allows a portion of the wiring harness assembly 300 to be led out from the housing. The housing chamber is also equipped with a limiting mechanism. The wiring harness assembly 300 cooperates with the limiting mechanism, and the side of the limiting mechanism near the insertion part 311 can contact the end face of the connecting part 312, allowing the connecting part 312 to transmit force to the contact surface between the limiting mechanism and the connecting part 312. For example... Figure 3 As shown, the connecting part 312 can be provided to wrap around the outer circumference of the lead wire 320, and a roughly annular boss structure is formed on the outer circumference of the connecting part 312. The end face of the connecting part 312 is the radially upward side of the annular boss.

[0046] In a further embodiment, the box body includes a base box 100 and a lid 200 that are connected to each other. Preferably, the base box 100 and the lid 200 are fixed together by screws. The base box 100 and the lid 200 are fixed together to form a receiving chamber.

[0047] In this embodiment, the lead wire cooperates with the limiting mechanism on the bottom box 100. When the lead wire is subjected to tensile force and instantaneous pulling, the radial end face of the connecting part 312 fixed to the outer periphery of the lead wire can abut against the side of the limiting mechanism, thereby transmitting the force to the contact surface between the limiting mechanism and the connecting part 312, realizing the dispersion of force, and preventing the insertion part 311 of the wire harness terminal 310 from falling off the enameled wire terminal 001 due to instantaneous external force pulling, thereby improving the reliability of the motor lead wire structure and reducing the occurrence of motor failure rate.

[0048] In a further embodiment, along the radial direction of the stator coil, the base box 100 includes an integrally formed main body 110 and a wire harness lead-out portion 120. The main body 110 is provided with a limiting mechanism; the wire harness lead-out portion 120 is used to gather the lead wires from the main body 110.

[0049] In a further embodiment, the limiting mechanism includes several snap-fit ​​protrusions 111 on the bottom box 100 corresponding to the wire harness assembly 300. Each snap-fit ​​protrusion 111 has a slot, in which the lead wire 32 is placed, and the side of the snap-fit ​​protrusion 111 near the insertion part 311 can contact the end face of the connecting part 312.

[0050] Optionally, the card slot is U-shaped to allow the lead wire 320 to engage better with the card slot.

[0051] Those skilled in the art further explain that after the stator lead wire structure is assembled, when the wire harness is not under tension, the end face of its connecting part 312 can be in contact with the front surface of the snap-fit ​​boss 111 or have a small gap of 0.1 to 0.8 mm. Among these, the ideal state is that the end face of the connecting part 312 is completely in contact with the front surface of the snap-fit ​​boss 111. However, in actual mass production, the presence of a small gap not only facilitates assembly but also reduces excessive tolerance design of parts, thus saving costs.

[0052] Please see Figure 4-5The limiting mechanism also includes a limiting boss 112 disposed on the bottom box 100. The limiting boss 112 is located on the side of the latching boss 111 away from the insertion part 311. The wire harness can coaxially pass through the limiting boss 112 and the latching boss 111. The limiting boss 112 is located on the side of the latching boss 111 away from the insertion part 311. The limiting boss 112 can limit the lead wire in a first direction and a second direction perpendicular to the extension direction of the lead wire, wherein the first direction is perpendicular to the second direction. The extension direction of the lead wire can be understood as the extension direction of the multiple wire harness assemblies as a whole. In this embodiment, when the wire harness assembly 300 is subjected to tension, one side wall of the limiting boss 112 can contact the annular side surface of the connecting part 312 to prevent the connecting part 312 from tilting.

[0053] Those skilled in the art further explain that, taking the bottom wall of the bottom box 100 as a reference, the first direction is a vertical direction perpendicular to the bottom wall of the bottom box, and the second direction is a horizontal direction parallel to the bottom wall. For example... Figure 4 As shown, the limiting boss 112 can be in the shape of an inverted L, but is not limited to this. In this embodiment, the limiting boss can not only limit the wire harness assembly 300 in the vertical direction, but also limit the wire harness assembly 300 in the horizontal direction, further reducing the probability that the wire harness assembly 300 will fall off the enameled wire terminal 001 when subjected to external force.

[0054] The limiting mechanism also includes several pre-pressing bosses 201, which are positioned corresponding to the slots of the cover 200 and the snap-fit ​​bosses 111. The pre-pressing bosses 201 cooperate with the slots to apply pressure to the lead wire 320 placed in the slots.

[0055] The snap-fit ​​boss 111, the limiting boss 112, and the pre-compression boss 201 are correspondingly provided, and their number is equal to that of the wire harness terminals 310. In one example, such as Figure 3 , Figure 4 and Figure 6 As shown, there are 3 wire harness assemblies 300, and 3 bayonet bosses 111, 3 limiting bosses 112, and 3 pre-compression bosses 201.

[0056] Those skilled in the art further explain that after the wire harness terminal 310 is installed with the bottom box 100, when the wire harness assembly 300 is under tension, the contact surface between its connecting part 312 and the limiting boss 112 is uniformly stressed in the circumferential direction. The purpose of this design is to reduce the skewness of the end face of the connecting part 312, avoid stress concentration, and ensure that the stress on the end face of the connecting part 312 is evenly distributed.

[0057] For further details, please refer to [link / reference]. Figure 6 The lid 200 is also provided with a clearance hole 202 corresponding to the limiting boss 112, so that the part of the limiting boss 112 that protrudes above the box body's accommodating space is placed in the clearance hole 202.

[0058] The advantages of designing the clearance hole 202 are: on the one hand, it reduces the net height of the area enclosed by the bottom box 100 and the cover 200, reducing the movement of the lead wire 320 during the operation of the washing machine; on the other hand, from the perspective of the washing machine as a whole, it reduces the maximum axial height of the motor stator in the washing machine, optimizes the internal layout of the washing machine, and makes it more compact and reasonable, so that the washing machine can be smaller in size under the same washing capacity.

[0059] In a further embodiment, the width of the wire harness lead-out portion 120 gradually decreases along the radial direction of the stator coil completion 000 and from the position of the limiting boss 112, and extends to the outer circumference of the stator coil completion 000 to converge the lead-out wires from the main body portion 110.

[0060] Please see Figure 7-8 The wire harness lead-out section 120 has corresponding grooves 121 on both side walls. The lead-out wires 320 gathered in the grooves 121 are secured to the grooves 121 by cable ties 122. The purpose of the grooves 121 is to limit the position of the cable ties 122 used to secure the lead-out wires 320 and prevent the cable ties 122 from sliding on the surface of the bottom box 100.

[0061] Optionally, the inner side of the bottom wall of the wire harness lead-out portion 120 is also provided with a first reinforcing rib 123, and a plurality of lead-out wires 320 are arranged around the first reinforcing rib 123. The outer side of the bottom wall of the wire harness lead-out portion 120, that is, the side opposite to where the first reinforcing rib 123 is provided, is provided with a second reinforcing rib 124, and the cable tie 122 is sequentially wrapped around the lead-out wires 320 and the second reinforcing rib 124.

[0062] Those skilled in the art further explain that the first reinforcing rib 123 and the second reinforcing rib 124 are used to increase the locking force of the cable tie 122 on the lead wire 320, and further reduce the impact of the force on the lead wire 320 on the wire harness terminal 310.

[0063] A second aspect of this utility model aims to protect a stator assembly, including a stator coil assembly 000, the coil assembly 000 including an insulating frame and the aforementioned stator lead wire structure, wherein the base box 100 is fixed to the insulating frame.

[0064] A third aspect of this utility model aims to protect an electric motor, including a stator assembly having the stator lead structure described above.

[0065] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stator lead wire structure, assembled on a stator coil (000), characterized in that, include: A base box (100) and a cover (200) are connected to each other. The base box (100) and the cover (200) cooperate to form a receiving chamber. A wire harness assembly (300) is provided in the receiving chamber. The wire harness assembly (300) includes several sets of interconnected wire harness terminals (310) and lead wires (320). The wire harness terminal (310) includes a plug-in part (311) that is plugged into the enameled wire terminal (001) of the stator coil (000) and a connecting part (312) that is circumferentially connected to the outer periphery of the lead wire (320). The bottom box (100) is provided with a limiting mechanism. The wire harness assembly (300) cooperates with the limiting mechanism. The side of the limiting mechanism near the plug-in part (311) can contact the end face of the connecting part (312), so that the connecting part (312) transmits force to the contact surface between the limiting mechanism and the connecting part (312).

2. The stator lead wire structure according to claim 1, characterized in that, The limiting mechanism includes a plurality of snap-fit ​​protrusions (111) corresponding to the wire harness assembly (300). The snap-fit ​​protrusions (111) have slots, and the lead wire (320) is placed in the slots. The side of the snap-fit ​​protrusions (111) near the plug-in part (311) can contact the end face of the connecting part (312).

3. The stator lead wire structure according to claim 2, characterized in that, The limiting mechanism further includes a plurality of limiting bosses (112), the limiting bosses (112) being located on the side of the buckle boss (111) away from the insertion part (311), the limiting bosses (112) being able to limit the lead wire in a first direction and a second direction perpendicular to the extension direction of the lead wire (320), the first direction being perpendicular to the second direction.

4. The stator lead wire structure according to claim 2, characterized in that, The cover (200) is provided with a plurality of pre-pressing bosses (201) corresponding to the slots of the buckle bosses (111). The pre-pressing bosses (201) cooperate with the slots to exert pressure on the lead wires (320) placed in the slots.

5. The stator lead wire structure according to claim 3, characterized in that, The cover (200) is also provided with a clearance hole (202), which corresponds to the position of the limiting boss (112), so that part of the structure of the limiting boss (112) is placed in the clearance hole (202).

6. The stator lead wire structure according to claim 2, characterized in that, The bottom box (100) includes an integrally connected main body (110) and a wire harness lead-out part (120); the limiting mechanism and the wire harness terminal (310) are located in the main body (110); the lead-out wires (320) are locked and fixed by being sequentially wrapped around a plurality of the lead-out wires (320) and the wire harness lead-out part (120) by cable ties (122).

7. The stator lead wire structure according to claim 6, characterized in that, The wire harness lead-out portion (120) has grooves (121) on both sides of its sidewalls. The cable tie (122) is wound around several of the lead-out wires (320) and the grooves (121) and placed in the grooves (121).

8. The stator lead wire structure according to claim 7, characterized in that: The bottom wall of the bottom box (100) is provided with a first reinforcing rib (123), the first reinforcing rib (123) is located at the wire harness lead-out part (120), and a plurality of lead-out wires (320) are arranged around the first reinforcing rib (123); The bottom wall of the bottom box (100) is provided with a second reinforcing rib (124), and the cable tie (122) is sequentially wrapped around a plurality of the lead wires (320) and the second reinforcing rib (124).

9. A stator assembly comprising a stator coil assembly (000), characterized in that, The stator coil assembly (000) includes an insulating frame and a stator lead wire structure as described in any one of claims 1-8, and the base box (100) is fixed to the insulating frame.

10. An electric motor, characterized in that, Includes the stator assembly as described in claim 9.

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