A connecting structure of motor winding end and PCB board

Abstract

The utility model discloses a motor winding end and the connecting structure of PCB board, including wire holder, PCB board and a plurality of windings, be provided with a plurality of electrically conductive column on wire holder, and PCB board is provided with with electrically conductive column equal number and one -to -one corresponding first jack, every electrically conductive column is inserted in corresponding first jack respectively and with PCB board electric connection, and every winding's end is electrically connected with corresponding electrically conductive column respectively. The utility model provides technical scheme to adopt electrically conductive column as winding end and the intermediate connecting structure of PCB board, avoided the winding end of traditional technology and led out to connect on PCB board, thereby make the wiring of winding end's lead -out wire more simple, solved the problem that winding end's lead -out wire is in disorder even and is entangled, overlaps, further, through winding end connection in electrically conductive column cover double -wall heat shrink tube's mode, to winding end played insulation, anti -oxidation and strengthen electrical connection reliability's effect.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a connection structure between the motor winding end and the PCB board. Background Technology

[0002] For motors with PCBs, the connection between the motor winding ends and the PCB is one of the key aspects of realizing the motor's electrical functions. Traditional connection methods often involve directly soldering multiple winding ends to the PCB or connecting them via wires. However, this approach has the following drawbacks in practical applications: the winding ends are numerous and scattered, and direct connection can easily lead to a messy layout of the winding leads, increasing assembly difficulty and potentially causing insulation damage and electromagnetic interference due to tangling or overlapping of the winding leads, thus affecting the motor's electrical performance and reliability.

[0003] To address the aforementioned technical problems, this application provides a connection structure between the motor winding end and the PCB board. By setting conductive posts as an intermediate connection medium, an orderly and stable connection between the winding end and the PCB board is achieved, simplifying the assembly process and improving the electrical performance and structural reliability of the motor. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a connection structure between the motor winding end and the PCB board, which aims to solve the technical problem of messy wires when connecting the motor winding end and the PCB board in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A connection structure between the end of a motor winding and a PCB board includes a wire frame, a PCB board, and multiple windings. The wire frame is provided with multiple conductive posts, and the PCB board is provided with first sockets that are equal in number and correspond one-to-one with the number of conductive posts. Each conductive post is inserted into its corresponding first socket and electrically connected to the PCB board. The end of each winding is electrically connected to its corresponding conductive post.

[0006] Furthermore, in the connection structure between the motor winding end and the PCB board, a conductive post mounting hole is provided on the wire frame for each conductive post, and each conductive post is inserted into the corresponding conductive post mounting hole in an interference fit manner.

[0007] Furthermore, in the connection structure between the motor winding end and the PCB board, the depth of each mounting hole is not less than 2mm.

[0008] Furthermore, in the connection structure between the motor winding end and the PCB board, each conductive post is fitted with a double-walled heat shrink tubing.

[0009] Furthermore, in the connection structure between the motor winding end and the PCB board, the wire frame is provided with multiple insulated pins, and the PCB board is provided with a second socket equal in number to the number of pins and corresponding to each other; each pin is inserted into the corresponding second socket.

[0010] Furthermore, in the connection structure between the motor winding end and the PCB board, each pin includes a pin body and a boss disposed at the end of the pin body, and each boss forms a step with the end of the pin body.

[0011] Furthermore, in the connection structure between the motor winding end and the PCB board, each boss has a tapered end.

[0012] Furthermore, in the connection structure between the motor winding end and the PCB board, the sum of the lengths of the boss and the tapered end is greater than the thickness of the PCB board.

[0013] Beneficial effects: This utility model provides a connection structure between the motor winding end and the PCB board. Compared with the prior art, it uses a conductive post as the intermediate connection structure between the winding end and the PCB board, so that the winding end is electrically connected to the conductive post, and the conductive post is electrically connected to the PCB board. This avoids the problem of connecting the winding end to the PCB board as in the traditional technology, making the wiring of the winding end lead wire simpler and solving the problem of messy or even tangled and overlapping winding end lead wires. Attached Figure Description

[0014] Figure 1 A perspective view of the connection structure between the motor winding end and the PCB board provided by this utility model.

[0015] Figure 2 for Figure 1 A magnified view of part A in the image.

[0016] Figure 3 A three-dimensional view of the wire frame, conductive posts, double-walled heat shrink tubing, and pins.

[0017] Figure 4 for Figure 3 A magnified view of part B in the middle section.

[0018] Figure 5 This is a 3D diagram of the wire frame.

[0019] Figure 6 for Figure 5 A magnified view of part C in the middle.

[0020] Figure 7 This is the front view of the wireframe.

[0021] Figure 8This is a schematic diagram illustrating the connection structure between the motor winding ends and the PCB board in a motor.

[0022] Figure 9 for Figure 8 A magnified view of part D in the middle.

[0023] Explanation of reference numerals in the attached figures: 1. Wire frame; 10. Wire groove cavity; 11. Wire frame body; 12. Support arm; 13. Limiting tooth; 2. PCB board; 201, First socket; 202, Second socket; 29, Wire; 3. Windings; 4. Conductive pillars; 5. Double-walled heat shrink tubing; 6. Pin; 61. Pin body; 62. Boss; 63. Tapered end; 611. Step; 7. Conductive post mounting base; 70. Conductive post mounting hole; 91. Motor spindle; 92. Motor stator core; 93. Motor front bracket; 94. Motor rear bracket. Detailed Implementation

[0024] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model is further described in detail below. It should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.

[0025] Please see Figures 1 to 9 This utility model provides a connection structure between the end of a motor winding and a PCB board. The accompanying drawings are for illustrative purposes only and are not proportional to an actual product. The drawings only show structures relevant to the innovation of this application (such as conductive posts, pins, conductive post mounting bases, etc.); some conventional structures are not specifically shown. The term "multiple" as used herein refers to a quantity of two or more. Since the exact number of structures (such as windings, conductive posts, and pins) is not the innovation of this application, it is not specifically limited. For ease of understanding, Figure 8 The diagram schematically illustrates the shape of the entire motor, showing the connecting structures including the motor spindle, motor stator core, motor front bracket, and motor rear bracket.

[0026] Please refer to the following first. Figure 1 , Figure 2 , Figure 8 and Figure 9The connection structure between the motor winding ends and the PCB board includes a wire frame 1, a PCB board 2, and multiple windings 3. Multiple conductive posts 4 are provided on the wire frame, and the PCB board has first sockets 201, one-to-one with the number of conductive posts. Each conductive post is inserted into its corresponding first socket and electrically connected to the PCB board. The end of each winding (not shown in the figure) is electrically connected to its corresponding conductive post. Since the winding end (hereinafter referred to as "winding end") is electrically connected to the conductive post (the section of the conductive post between the PCB board and the wire frame), it is preferably soldered (e.g., tin soldering), and the conductive post is electrically connected to the PCB (usually soldered to the corresponding pad on the PCB board). The PCB board is then connected to the external circuit via wires (four wires 29 are schematically shown in the figure). This arrangement enables an electrical connection between the winding ends and the PCB board, resulting in a cleaner and more compact connection. It avoids the direct connection of the winding ends to the PCB board, as in traditional technologies, which leads to messy and even tangled wires at the winding ends.

[0027] The aforementioned wireframe 1 is made of insulating material, preferably injection molded from insulating plastic. The wireframe 1 provides support for the PCB board 2. (See also...) Figures 5 to 7 The wire frame 1 includes a ring-shaped wire frame body 11, on which multiple support arms 12 are provided, and a wire groove cavity 10 is formed between two adjacent support arms; each support arm is connected to a limiting tooth 13 at its end. In practical applications, the wire frame is set at the end of the motor stator core ( Figure 8 (View from the right). The number of slots on the wire frame and the number of slots on the motor stator core are equal and correspond one-to-one, to facilitate normal winding or assembly of the windings. Since the structure of the motor stator core itself is existing technology and is not the innovation of this application, the structure of the motor stator core will not be described in detail here.

[0028] The diameter of the first socket is slightly larger than the outer diameter of the conductive post (e.g., 0.1 mm) to ensure that the conductive post can be inserted into the first socket and to ensure that subsequent welding can proceed normally.

[0029] The aforementioned conductive post 4 is made of conductive material. The material of the conductive post can be selected according to actual conditions (e.g., brass, copper alloy, aluminum alloy, etc.), and is not limited here. After being inserted into the first socket, the conductive post passes through the PCB board and protrudes to the other side of the PCB. Figure 2 (View from the top side) so that the conductive post can be fixedly connected to the pads around the first socket on the PCB board by welding. The solder joints formed after welding can further strengthen the connection strength of the conductive post PCB board.

[0030] It should be noted that although five conductive posts are shown in the diagram, this is merely an example and not a limitation. The number of conductive posts depends on the specific situation. For example, a unipolar stepper motor has four internal excitation windings (divided into two sets of center tap structures), with a total of five wires (i.e., five winding ends). One end is a common end (drawn from the combined center taps of the two winding sets), which is connected to one of the conductive posts (usually connected to the positive terminal of the power supply). The remaining four ends correspond to the free ends of the four excitation windings, each connected to its corresponding conductive post. By controlling the on / off state between these four free ends and the common end, the stepping operation of the motor can be controlled. It should be noted that, in addition to the unipolar stepper motor mentioned above, the connection structure provided in this application can be widely adapted to motor types that require winding control via PCB. The number of ends varies depending on the winding structure, number of poles, or control method of different motors, and in practical applications, it depends on the specific circumstances.

[0031] like Figure 6 As shown, furthermore, a conductive post mounting hole 70 is provided at each corresponding conductive post on the wire frame, and each conductive post is inserted into the corresponding conductive post mounting hole with an interference fit. This setting simplifies the installation of the conductive posts, allowing assembly to be performed by simply inserting one end of the conductive post into the mounting hole. The interference fit between the conductive post and the conductive post mounting hole on one side is controlled within 0.1mm, which ensures that the conductive post is not easily loosened after being inserted into the mounting hole, while also preventing excessive interference fit from causing the wire frame mounting hole to crack.

[0032] Preferably, the conductive post has a rectangular cross-section, and the conductive post mounting hole is a circular hole. This design makes it less likely for the conductive post to rotate after being inserted into the conductive post mounting hole.

[0033] Furthermore, a conductive post mounting base 7 is provided at each conductive post on the wire frame, and the aforementioned conductive post mounting hole 70 is formed in the conductive post mounting base. The mounting hole is located at the center of the conductive post mounting base, and the axis of the mounting hole coincides with the axis of the conductive post mounting base. The significance of this setting is that, through the protruding structure of the conductive post mounting base, the effective depth of the mounting hole can be ensured without increasing the thickness of the wire frame body.

[0034] Furthermore, the depth of each conductive post mounting hole 70 is not less than 2mm, preferably 4-6mm. The significance of this design is that, through the protruding structure of the conductive post mounting base, the effective depth of the mounting hole can be ensured without increasing the thickness of the wire frame body (the thickness of the wire frame body can be controlled within 3-5mm). like Figure 2As shown, each conductive post 4 is further fitted with a double-walled heat shrink tubing 5. When heated, the adhesive inside the double-walled heat shrink tubing 5 melts, completely covering the winding end. The shrinkage ratio of the double-walled heat shrink tubing is preferably 2:1, and its temperature range is -55℃ to 125℃, making it suitable for the temperature environment during motor operation.

[0035] It should be noted that, in order to facilitate simultaneous observation of the double-walled heat shrink tubing 5 and the conductive post 4, the double-walled heat shrink tubing is drawn relatively short in the attached diagram. In actual applications, the double-walled heat shrink tubing should at least be able to completely cover the winding end to prevent oxidation after the winding end is welded and to provide insulation.

[0036] Please see Figure 2 and Figure 3 Furthermore, the wire frame is provided with multiple insulated pins 6, and the PCB board is provided with second sockets 202, the number of which are equal to and correspond one-to-one with the pins; each pin is inserted into its corresponding second socket. Preferably, the diameter of the second socket is 0.05mm larger than the outer diameter of the pin, which facilitates the insertion of the pin into the second socket and ensures the fit between the pin and the inner wall of the socket. By setting the pins, the PCB board is positioned and supported by the pins and conductive posts. The pins mainly bear the mechanical support load, while the conductive posts take on the functions of electrical connection and auxiliary support, avoiding bending deformation or solder joint cracking of the conductive posts due to long-term stress, and further improving the reliability of the overall connection structure.

[0037] Please see Figure 4 Furthermore, each pin 6 includes a pin body 61 and a boss 62 disposed at the end of the pin body, with each boss forming a step 611 with the end of the pin body. This step 611 can limit the movement of the PCB board, preventing the PCB board from moving towards the line frame along the pin axis.

[0038] Furthermore, each boss has a tapered end 63. The tapered end serves as a guide, which helps the pins to be accurately inserted into the corresponding second socket on the PCB board, reducing the alignment difficulty during assembly, improving assembly efficiency, and reducing mechanical damage to the PCB board when the pins are inserted.

[0039] Furthermore, the sum of the lengths of the boss and the tapered end is greater than the thickness of the PCB board. This arrangement allows the tapered end to pass through the PCB (e.g., Figure 2 As shown), it protrudes from the other side of the PCB board ( Figure 2 (View from the top side) to ensure the guiding and positioning function of the pin.

[0040] The actual assembly process can refer to the following steps: First, complete the winding assembly, insert the conductive posts into the mounting holes of each conductive post, weld each winding end to the corresponding conductive post, put the conductive posts on double-wall heat shrink tubing and perform heat shrink treatment, set the PCB board on the wire frame, insert each pin into the second socket, and insert each conductive post into the first socket.

[0041] Preferably, the wire frame, conductive post mounting base, and pin described above can be integrally injection molded from insulating plastic.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of the present utility model, and all such modifications or substitutions should fall within the protection scope of the present utility model.

Claims

1. A connection structure between the end of a motor winding and a PCB board, comprising a wire frame, a PCB board, and multiple windings, characterized in that: The wire frame is provided with multiple conductive posts, and the PCB board is provided with a number of first sockets that are equal to and correspond one-to-one with the number of conductive posts; each conductive post is inserted into its corresponding first socket and is electrically connected to the PCB board; the end of each winding is electrically connected to its corresponding conductive post.

2. The connection structure between the motor winding end and the PCB board according to claim 1, characterized in that: Each conductive post on the wire frame has a corresponding conductive post mounting hole, and each conductive post is inserted into the corresponding conductive post mounting hole with an interference fit.

3. The connection structure between the motor winding end and the PCB board according to claim 2, characterized in that: The depth of each mounting hole shall not be less than 2mm.

4. The connection structure between the motor winding end and the PCB board according to claim 1, characterized in that: Each conductive post is fitted with a double-walled heat shrink tubing on its outer side.

5. The connection structure between the motor winding end and the PCB board according to claim 1, characterized in that: The wire frame is equipped with multiple insulated pins, and the PCB board has a number of second sockets that correspond one-to-one with the number of pins; each pin is inserted into the corresponding second socket.

6. The connection structure between the motor winding end and the PCB board according to claim 5, characterized in that: Each pin includes a pin body and a boss located at the end of the pin body, with each boss forming a step with the end of the pin body.

7. The connection structure between the motor winding end and the PCB board according to claim 6, characterized in that: Each boss has a tapered end.

8. The connection structure between the motor winding end and the PCB board according to claim 7, characterized in that: The sum of the lengths of the boss and the tapered end is greater than the thickness of the PCB board.

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