A terminal connection structure of a multi-wire connection

Abstract

The application discloses a terminal connection structure of multi-wire connection, relates to the technical field of motor manufacturing, and comprises a stator core and connecting pieces which are buckled on both sides of the stator core, a plurality of wire ends are left after winding coils at each core tooth position of the stator core and the connecting pieces, a plurality of positioning columns are arranged on the side, away from the stator core, of the connecting pieces, the connecting pieces are provided with a plurality of wiring bases, the wiring bases are provided with fixing grooves, the wiring bases are provided with connecting terminals corresponding to the fixing grooves, the connecting terminals are provided with a plurality of connecting grooves connected with the wire ends, and terminal connectors are arranged at positions, away from the wiring bases, of the connecting terminals. The wire ends left after winding coils can be connected with the connecting grooves of the connecting terminals, orderly connection of the wire ends is realized, and the wire ends can be uniformly crimped and welded after being fixed, so that line confusion is avoided, phase current of each wire package is reduced, temperature of the terminal connection position is reduced, and the operation is convenient.

Description

Technical Field

[0001] This application relates to the field of motor manufacturing technology, and in particular to a multi-wire connection terminal connection structure. Background Technology

[0002] During the manufacturing process of motor stator coils, the wound coil ends need to be reliably electrically connected through terminals. Traditional stator coil end connection methods mainly rely on soldering or crimping processes, such as soldering enameled wire to terminals with a soldering iron, or using crimp terminals to mechanically interlock multiple strands of wire.

[0003] The stator coil of the motor adopts a delta connection and single-wire winding method, with the ends connected and connected through terminals. After the enamel is removed from the wire ends, they are then soldered.

[0004] Regarding the aforementioned technologies, the inventors believe that when multiple wires are wound in a delta configuration for stator coils, the multiple wire ends are arranged haphazardly at the terminal positions, requiring multiple crimping and soldering operations, which is cumbersome. Utility Model Content

[0005] The purpose of this application is to provide a terminal connection structure for multi-wire connection, so as to improve the problem that when multiple wire ends are randomly arranged at the terminal position when the stator coil is connected in a delta configuration and wound in parallel, multiple crimping and soldering are required, which is cumbersome.

[0006] This application provides a multi-wire connection terminal structure, which adopts the following technical solution:

[0007] A multi-wire terminal connection structure includes a stator core and connectors that are interlocked on both sides of the stator core. After winding a coil at each core tooth position of the stator core and connectors, several wire ends are left. Several positioning posts are provided on the side of the connector away from the stator core. Several wiring bases are provided on the connector. The wiring bases have fixing slots. Connection terminals corresponding to the fixing slots are provided in the wiring bases. Several connection slots for connecting the wire ends are provided in the connection terminals. Terminal connectors extend from the position of the connection terminals away from the wiring bases.

[0008] By adopting the above technical solution, the positioning posts on the connector facilitate the precise positioning and installation of the overall structure and other components, improving assembly efficiency. The terminal connectors extended from the connecting terminals facilitate quick and stable connection with external circuits. The wire ends left after winding the coil can be connected to the connecting slots of the connecting terminals to achieve orderly connection of multiple wire ends. After the wire ends are connected and fixed, they can be crimped and welded uniformly to avoid circuit chaos, reduce the phase current of each coil, reduce the temperature at the terminal connection, and facilitate operation.

[0009] Optionally, the side wall of the wiring base is provided with a limiting groove corresponding to the connecting groove, and the connecting terminal is provided with a through groove along its length direction corresponding to the length direction of the connecting groove.

[0010] By adopting the above technical solution, the limiting groove on the side wall of the wiring base corresponds to the connecting groove, which can laterally limit the wire end placed in the connecting groove, preventing the wire end from shifting or shaking during the connection process or use, and further ensuring the stability of the wire end connection; the through groove opened along the length direction of the connecting terminal corresponds to the length direction of the connecting groove, which makes it easy to observe the connection status of the wire end in the connecting groove, and also makes it convenient to operate or reinforce the connection part through the through groove when necessary.

[0011] Optionally, a guide slope is provided on the inner sidewall of the connecting groove facing the wiring base.

[0012] By adopting the above technical solution, the guide slope plays a guiding role when inserting the wire end into the connection slot, reducing the difficulty of inserting the wire end, enabling the wire end to enter the connection slot more smoothly and quickly, and improving wiring efficiency.

[0013] Optionally, the inner wall of the fixing groove is provided with a number of support columns that contact the wire end, and the support columns correspond to the connecting groove and the limiting groove.

[0014] By adopting the above technical solution, the several supporting columns set on the inner side wall of the fixing groove correspond to the connecting groove and the limiting groove, which can effectively support the wire ends placed in the connecting groove and the limiting groove, so that the wire ends maintain a stable posture at the connection point, avoid the connection loosening due to the weight of the wire ends or external vibration, and further make the wire end connection more stable.

[0015] Optionally, the top of the support column is flush with the bottom of the limiting groove.

[0016] By adopting the above technical solution, the top of the support column is flush with the bottom of the limiting groove, so that the wire end is on the same horizontal plane under the combined action of the limiting groove and the support column, and the force is more even. This avoids the situation where the wire end is damaged or poorly connected due to excessive local force caused by inconsistent support height.

[0017] Optionally, the connecting terminal is arranged in an arc shape on the side facing the inner wall of the fixing groove.

[0018] By adopting the above technical solution, the side of the connecting terminal facing the inner wall of the fixing groove is arranged in an arc shape. On the one hand, it is convenient for the connecting terminal to be inserted into the fixing groove to fix the wire end. On the other hand, the arc structure can disperse stress and avoid stress concentration at the contact point between the connecting terminal and the inner wall of the fixing groove, thus extending the service life of the connecting terminal.

[0019] Optionally, the connecting terminal is provided with guide protrusions at both ends, and the inner sidewall of the fixing groove is provided with a relief groove corresponding to the guide protrusions.

[0020] By adopting the above technical solution, the guide protrusions at both ends of the connecting terminal correspond to the relief grooves on the inner sidewall of the fixing groove. When the connecting terminal is installed into the fixing groove, the guide protrusions slide along the relief grooves, which play a guiding and positioning role, enabling the connecting terminal to be installed accurately and quickly.

[0021] Optionally, the guide protrusion is inclined and its size is slightly larger than the depth of the relief groove.

[0022] By adopting the above technical solution, the guide protrusion is inclined and its size is slightly larger than the depth of the relief groove. When the connecting terminal is installed into the fixing groove, the guide protrusion will produce a certain elastic deformation due to the pressure of the inner wall of the relief groove. After installation, the reaction force generated by the elastic deformation makes the guide protrusion tightly engaged in the relief groove, thereby fixing the connecting terminal more firmly in the fixing groove and effectively preventing the connecting terminal from loosening or falling off.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The positioning posts on the connector facilitate precise positioning and installation of the overall structure and other components, improving assembly efficiency. The terminal connectors extended from the connecting terminals facilitate quick and stable connection with external circuits. The wire ends left after winding the coil can be connected to the connecting slots of the connecting terminals to achieve orderly connection of multiple wire ends. After the wire ends are connected and fixed, they can be crimped and soldered uniformly to avoid circuit chaos, reduce the phase current of each coil, reduce the temperature at the terminal connection, and facilitate operation.

[0025] 2. The limiting groove on the side wall of the wiring base corresponds to the connecting groove, which can laterally limit the wire end placed in the connecting groove, preventing the wire end from shifting or shaking during the connection process or use, and further ensuring the stability of the wire end connection.

[0026] 3. The guide protrusion is inclined and its size is slightly larger than the depth of the relief groove. When the connecting terminal is installed into the fixing groove, the guide protrusion will produce a certain elastic deformation due to the pressure of the inner wall of the relief groove. After installation, the reaction force generated by the elastic deformation will make the guide protrusion tightly locked in the relief groove, thereby fixing the connecting terminal more firmly in the fixing groove and effectively preventing the connecting terminal from loosening or falling off. Attached Figure Description

[0027] Figure 1 This is an overall schematic diagram of a multi-wire connection terminal structure;

[0028] Figure 2 This is a schematic diagram showing the separate components of the wiring base and the connecting terminals.

[0029] In the diagram, 1 is the stator core; 2 is the connector; 21 is the positioning post; 3 is the wire end; 4 is the wiring base; 41 is the fixing groove; 42 is the limiting groove; 43 is the support column; 44 is the clearance groove; 5 is the connecting terminal; 51 is the connecting groove; 511 is the guide slope; 52 is the terminal connector; 53 is the through groove; and 54 is the guide protrusion. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 2 This application will be described in further detail below.

[0031] A multi-wire connection terminal connection structure, as shown in the reference. Figure 1 and Figure 2 The system includes a stator core 1 and connectors 2 that are installed on both sides of the stator core 1 and interlocked with each other. The connectors 2 are made of PPS insulating material. After winding the coil by multiple wires in a triangular connection at each core tooth position of the stator core 1 and connectors 2, several wire ends 3 are left. Several positioning posts 21 integrally formed with the connectors 2 are provided on the side of the connectors 2 away from the stator core 1. Several integrally formed wiring bases 4 are provided on the connectors 2. Fixing grooves 41 are opened in the wiring bases 4. Metal connecting terminals 5 corresponding to the fixing grooves 41 are inserted into the wiring bases 4. Several connecting grooves 51 that connect to the wire ends 3 are opened on one side of the connecting terminals 5. Integrally formed metal terminal connectors 52 are extended from the position of the connecting terminals 5 away from the wiring bases 4. The wire ends 3 left after winding the coil can be connected to the connecting grooves 51 of the connecting terminals 5, realizing the orderly connection of multiple wire ends 3. After the wire ends 3 are connected and fixed, they can be crimped and welded uniformly, which is convenient to operate.

[0032] Reference Figure 1 and Figure 2 A limiting groove 42 corresponding to the connecting groove 51 is provided on the side wall of the wiring base 4 to laterally limit the wire end 3 placed in the connecting groove 51, preventing the wire end 3 from shifting or shaking during connection or use. A through groove 53 corresponding to the length direction of the connecting groove 51 is provided along the length direction of the connecting terminal 5 to facilitate observation of the connection status of the wire end 3 in the connecting groove 51. The side of the connecting terminal 5 facing the inner side wall of the fixing groove 41 is arc-shaped to facilitate the insertion of the connecting terminal 5 into the fixing groove 41 for fixing.

[0033] Reference Figure 2A guide slope 511 is provided on the inner side wall of the connecting groove 51 facing the wiring base 4. The guide slope 511 corresponds to the side wall of the wire end 3, which facilitates pressing the wire end 3 into the connecting groove 51 and removing the paint from the part where the wire end 3 connects to the connecting terminal 5, so that the wire end 3 and the connecting terminal 5 are electrically connected. Several support columns 43 integrally formed with the wiring base 4 are provided on the inner side wall of the fixing groove 41. The support columns 43 are in contact with the wire end 3 and correspond to the connecting groove 51 and the limiting groove 42. The top of the support column 43 is flush with the bottom of the limiting groove 42. Under the combined action of the limiting groove 42 and the support column 43, the wire end 3 is on the same horizontal plane and the force is more even.

[0034] Reference Figure 2 One-piece molded guide protrusions 54 are provided at both ends of the connecting terminal 5. A relief groove 44 corresponding to the guide protrusions 54 is provided on the inner side wall of the fixing groove 41. The guide protrusions 54 are inclined and their size is slightly larger than the depth of the relief groove 44. When the connecting terminal 5 is installed into the fixing groove 41, the guide protrusions 54 will undergo a certain elastic deformation due to the pressure of the inner wall of the relief groove 44. After installation, the guide protrusions 54 are tightly engaged in the relief groove 44 to fix the connecting terminal 5.

[0035] The implementation principle of this application embodiment is as follows:

[0036] In actual operation, after the insulating connectors 2 on both sides of the stator core 1 are fastened and fixed, multiple wires are wound into coils at the core tooth positions of the stator core 1 and connectors 2 using a triangular connection method. Several wire ends 3 are left at the first and second parts of the coil at each core tooth position. The wire ends 3 located at the same core slot position are inserted into the connecting slot 51 of the connecting terminal 5. Then, the connecting terminal 5 is inserted into the fixing slot 41 of the wiring base 4 on the connector 2, so that the wire ends 3 are fixed in the limiting slot 42 of the wiring base 4. The wire ends 3 are fixed, and the orderly connection of multiple wire ends 3 is realized. After the wire ends 3 are connected and fixed, they can be crimped and welded uniformly, which is convenient to operate.

[0037] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A terminal connection structure of a multi-wire connection, characterized by: The stator core (1) includes a stator core (1) and connectors (2) that are interlocked on both sides of the stator core (1). After the coil is wound at each core tooth position of the stator core (1) and connectors (2), several wire ends (3) are left. Several positioning posts (21) are provided on the side of the connector (2) away from the stator core (1). Several wiring bases (4) are provided on the connector (2). The wiring bases (4) have fixed grooves (41). The wiring bases (4) have corresponding connection terminals (5) in the wiring bases (4). Several connection grooves (51) are provided on the connection terminals (5) to connect with the wire ends (3). Terminal connectors (52) are provided on the connection terminals (5) at the position away from the wiring bases (4).

2. The terminal connection structure for multi-wire connection according to claim 1, characterized in that: The side wall of the wiring base (4) is provided with a limiting groove (42) corresponding to the connecting groove (51), and the connecting terminal (5) is provided with a through groove (53) corresponding to the length direction of the connecting groove (51) along its length direction.

3. A terminal connection structure of a multi-wire connection according to claim 2, characterized in that: The inner wall of the connecting groove (51) is provided with a guide slope (511) facing the wiring base (4).

4. A terminal connection structure of a multi-wire connection according to claim 3, characterized in that: The inner wall of the fixing groove (41) is provided with a number of support columns (43) that are in contact with the wire end (3). The support columns (43) correspond to the connecting groove (51) and the limiting groove (42).

5. A terminal connection structure of a multi-wire connection according to claim 4, characterized in that: The top of the support column (43) is flush with the bottom of the limiting groove (42).

6. A terminal connection structure of a multi-wire connection according to claim 5, characterized in that: The connecting terminal (5) is arranged in an arc shape on the side facing the inner wall of the fixing groove (41).

7. A terminal connection structure of a multi-wire connection according to claim 6, characterized in that: The connecting terminal (5) is provided with guide protrusions (54) at both ends, and the inner sidewall of the fixing groove (41) is provided with a relief groove (44) corresponding to the guide protrusions (54).

8. A terminal connection structure of a multi-wire connection according to claim 7, characterized by: The guide protrusion (54) is inclined and its size is slightly larger than the depth of the relief groove (44).

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