Servo motor with novel circuit board doubling structure

Abstract

The utility model relates to a servo motor with a novel circuit board doubling structure, which comprises a rotor and a stator core interacting with the rotor, a coil winding is mounted in the stator core through a framework, a circuit board and a CP copper wire are arranged at the top of the framework, and a bottom layer, a top layer and a middle layer are arranged in the circuit board in a layered manner. One end of the CP copper wire is connected with the coil winding, the main line layer of the CP copper wire at the other end is connected with the middle layer of the circuit board, and the shunting layer of the CP copper wire is connected with the top layer or the bottom layer of the circuit board. According to the scheme, the circuit board is designed, the positions of the shunting layers are optimized, the shunting layers are connected with the CP copper wires in a layered mode, the shunting layers with small currents are designed in the middle layer, the height of a motor coil is reduced, and a motor body is more compact. Through the novel doubling structure of the servo motor, automatic production is realized, the production efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of servo motor manufacturing technology, and in particular to a novel servo motor with a parallel circuit board structure. Background Technology

[0002] The continuous development of automation and robotics technologies has driven the widespread application of servo motors in industrial production. As a key actuator, the performance of servo motors is crucial to the efficiency and precision of automated production lines. However, conventional low-voltage servo motors present some challenges in design and manufacturing, particularly in cable design, PCB structure, automated production processes, and chassis structure.

[0003] Conventional low-voltage servo motors often require thicker load cables than high-voltage motors, making it impossible to use the PCB wiring solutions typically used for high-voltage motors. This necessitates manual wiring during the process. This situation results in longer motor bodies, material waste, and hinders automated production. Utility Model Content

[0004] The purpose of this invention is to provide a new type of servo motor with a parallel circuit board structure to solve the problems encountered in the background art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A novel servo motor with a parallel circuit board structure includes a rotor and a stator core that interacts with the rotor. A coil winding is mounted in the stator core via a frame. A circuit board and a CP copper wire are provided on the top of the frame. The circuit board is internally layered, including a bottom layer, a top layer, and an intermediate layer. One end of the CP copper wire is connected to the coil winding, and the main layer of the CP copper wire at the other end is connected to the intermediate layer of the circuit board. The shunt layer of the CP copper wire is connected to the top or bottom layer of the circuit board.

[0007] In the above scheme, the intermediate layer is located between the bottom layer and the top layer, and dielectric layers are installed between the bottom layer and the intermediate layer, and between the intermediate layer and the top layer.

[0008] As a preferred embodiment, the bottom surface of the bottom layer and the top surface of the top layer are each provided with a first conductive region, which is connected to the main conductor layer of the CP copper wire. The top surface of the intermediate layer is provided with a second conductive region, and the bottom surface of the intermediate layer is provided with a third conductive region, which are connected to the shunt layer of the CP copper wire.

[0009] In the above scheme, the skeleton is provided in multiple ways. The skeleton includes winding posts and pads fixedly installed on the winding posts. The gap between two adjacent winding posts forms a winding groove. CP copper wire is inserted into the top two sides of the pad. The top of the pad is provided with a top block spaced apart from the circuit board. The outer peripheral surface of the circuit board is provided with a through hole connected to the CP copper wire.

[0010] In specific implementation, the pad has clearance grooves on both inner sides, and the coil connector of the coil winding passes through the clearance grooves to connect with the CP copper wire. A stator tooth groove is formed in the middle of the winding post, and the height of the tooth groove is the same as the height of the stator core. Side clamps are provided on the inner walls of both sides of the stator tooth groove, and a tightening part is provided at the bottom of the stator tooth groove.

[0011] Compared with existing technologies, the advantages of this invention are as follows: One end of the CP copper wire is connected to the coil winding, and the beginning and end of the coil winding are wound onto the CP copper wire, thus forming a parallel connection to reduce the coil height of the motor. At the other end, the main layer of the CP copper wire is connected to the middle layer of the circuit board, and the shunt layer of the CP copper wire is connected to the top or bottom layer of the circuit board. Since the current in each parallel branch is half that of the main circuit, the current here is smaller, and the heat generation is also smaller. Connecting the smaller shunt layer to the middle layer of the circuit board ensures that the conductors on the circuit board can effectively carry the current at the motor's rated load point, ensuring that excessive heat is not generated.

[0012] This solution optimizes the circuit board design by placing the current shunt layer in a layered configuration with the CP copper wires. The lower-current shunt layer is positioned in the middle layer, reducing the height of the motor coil and resulting in a more compact motor body. This novel parallel-line structure for the servo motor enables automated production, improving efficiency and reducing costs. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is an exploded view of the present invention;

[0016] Figure 3 This is a schematic diagram of the overall structure of the skeleton in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of a single skeleton in this utility model;

[0018] Figure 5 This is a structural schematic diagram of a single skeleton in this utility model from another perspective;

[0019] Figure 6 This is an exploded view of the circuit board in this utility model;

[0020] Figure 7 This is a schematic diagram of the top structure of the middle layer in this utility model;

[0021] Figure 8 This is a schematic diagram of the bottom structure of the intermediate layer in this utility model.

[0022] Numbering in the diagram: 1-Stator core; 2-Board; 21-CP copper wire; 22-Winding slot; 23-Allowing slot; 24-Winding post; 25-Stator toothed slot; 26-Side clamp; 27-Tightening part; 28-Padded block; 29-Top block; 3-Coil winding; 31-Coil connector; 4-Circuit board; 41-Bottom layer; 42-Intermediate layer; 43-Top layer; 44-Dielectric layer; 45-First conductive area; 46-Second conductive area; 47-Third conductive area; 48-Perforation. Detailed Implementation

[0023] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the utility model will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model, and therefore only show the relevant components of this utility model.

[0024] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0025] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 and Figure 2 As shown, a novel servo motor with a parallel circuit board structure includes a rotor and a stator core 1 that interacts with the rotor. Coil windings 3 are mounted in the stator core 1 via a frame 2. In implementation, the stator core 1 is divided into an outer yoke section and a toothed section, with the inner toothed section mounted in the frame 2. When the servo motor operates, the magnetic field generated by the stator interacts with the magnetic field generated by the rotor, causing the rotor to rotate.

[0027] The frame 2 insulates the coil winding 3 from the stator core 1. The top of the frame 2 houses a circuit board 4 and CP copper wire 21. The circuit board 4 has a layered internal structure including a bottom layer 41, a top layer 43, and a middle layer 42. One end of the CP copper wire 21 is connected to the coil winding 3, and the beginning and end of the coil winding 3 are wound onto the CP copper wire 21, forming a parallel connection to reduce the coil height of the motor. At the other end, the main layer of the CP copper wire 21 is connected to the middle layer 42 of the circuit board 4, and the shunt layer of the CP copper wire 21 is connected to either the top layer 43 or the bottom layer 41 of the circuit board 4, making the coil winding 3 conductive with the circuit board 4. Since the current in each parallel branch is half that of the main circuit, the current here is smaller, and the heat generation is also smaller. The smaller shunt layer is connected to the middle layer 42 of the circuit board 4. This arrangement ensures that the conductors on the circuit board can effectively carry the current at the motor's rated load point, ensuring that excessive heat is not generated.

[0028] Please see Figures 6 to 8 The intermediate layer 42 is located between the bottom layer 41 and the top layer 43. Dielectric layers 44 are installed between the bottom layer 41 and the intermediate layer 42, and between the intermediate layer 42 and the top layer 43, respectively, to provide insulation and reduce the conduction of electrical energy. Alternatively, the intermediate layer 42 connects the branch current, while the top layer 43 and the bottom layer 41 connect the main current. By designing the circuit board 4 with multiple current-sharing layers, the lower current-sharing layer is positioned in the intermediate layer 42, which has poor heat dissipation, while the higher current-sharing layers are designed in the bottom layer 41 and the top layer 43 of the circuit board 4. Furthermore, the layers of the circuit board 4 are connected by external copper foil bridging to achieve logic paralleling, thereby carrying high load current, ensuring stable power supply to the motor system, and adapting to the requirements of low voltage and high current.

[0029] When the layers of circuit board 4 are bridged using external copper foil, the bottom surface of the bottom layer 41 and the top surface of the top layer 43 are respectively provided with a first conductive area 45, which is connected to the main line layer of the CP copper wire 21. The top surface of the middle layer 42 is provided with a second conductive area 46, and the bottom surface of the middle layer 42 is provided with a third conductive area 47. The second conductive area 46 and the third conductive area 47 are connected to the shunt layer of the CP copper wire 21. The first conductive area 45, the second conductive area 46, and the third conductive area 47 are all bridged using copper foil. There are a total of 24 through holes 48 around the circuit board 4, corresponding to the input and output wires of 12 sets of motor coils. The coil windings 3 of the motor stator are then realized through the logic circuit in the circuit board 4.

[0030] Please see Figures 3 to 5Multiple bobbins 2 are provided, and in practice, 12 bobbins 2 are typically used. Each bobbin 2 includes a winding post 24 and a pad 28 fixedly mounted on the winding post 24. The gap between two adjacent winding posts 24 forms a winding groove 22 for winding the coil winding 3. Insertion holes are provided on both sides of the pad 28, and CP copper wires 21 are inserted into the top two sides of the pad 28. The top of the pad 28 has a top block 29 spaced apart from the circuit board 4, which serves to position the circuit board 4 at the same height. The outer periphery of the circuit board 4 has through holes 48 for connecting to the CP copper wires 21, which also serve a positioning function during assembly and facilitate the layered connection of the CP copper wires 21 and the circuit board 4.

[0031] The injection mold of the skeleton 2 has a pin hole for the CP copper wire 21. The position of this hole is consistent with the wiring position of the circuit board 4. The beginning and end of the coil winding 3 are wound on the CP copper wire 21. The pin of the CP copper wire 21 is soldered to the circuit board 4, realizing the logical parallel connection of the 12 sets of stator iron cores 1 in the motor on the circuit board 4.

[0032] To facilitate assembly, the inner sides of the pad 28 are provided with clearance grooves 23. The positive and negative coil connectors 31 of the coil winding 3 pass through the clearance grooves 23 and are connected to the CP copper wire 21. The winding post 24 has a stator tooth groove 25 in the middle for installing the toothed part of the stator core 1. The height of the tooth groove 25 is the same as the height of the stator core 1 to facilitate the secure fixing of the stator core 1.

[0033] As a preferred embodiment, the stator tooth groove 25 has side clamping portions 26 on both inner walls, which clamp the sides of the toothed portion of the stator core 1. The stator tooth groove 25 also has a pressing portion 27 at its bottom, which presses against the bottom of the toothed portion of the stator core 1. In practice, both the side clamping portions 26 and the pressing portion 27 can be configured as bosses or triangular bosses protruding from the inner wall of the stator tooth groove 25 to press against the toothed portion of the stator core 1, making it more stable after installation.

[0034] This solution optimizes the position of the current shunt layer in the design of circuit board 4, connecting it in layers with the CP copper wire 21. The lower-current shunt layer is placed in the middle layer 42, reducing the height of the motor coil and making the motor body more compact. This novel parallel-line structure for the servo motor enables automated production, improves production efficiency, and reduces costs.

[0035] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A servo motor of a novel lamination structure of a circuit board, comprising a rotor and a stator core (1) interacting with the rotor, a coil winding (3) being mounted in the stator core (1) by means of a skeleton (2), characterized in that: The top of the skeleton (2) is provided with a circuit board (4) and a CP copper wire (21), the inner layer of the circuit board (4) is provided with a bottom layer (41), a top layer (43) and a middle layer (42), one end of the CP copper wire (21) is connected with the coil winding (3), the other end of the CP copper wire (21) is connected with the middle layer (42) of the circuit board (4), and the shunt layer of the CP copper wire (21) is connected with the top layer (43) or the bottom layer (41) of the circuit board (4).

2. A servo motor with a novel flat cable structure according to claim 1, characterized in that: The middle layer (42) is located between the bottom layer (41) and the top layer (43), and a dielectric layer (44) is mounted between the bottom layer (41) and the middle layer (42) and between the middle layer (42) and the top layer (43).

3. A servo motor with a novel flat cable structure according to claim 2, characterized in that: The bottom surface of the bottom layer (41) and the top surface of the top layer (43) are respectively provided with a first conductive area (45), and the first conductive area (45) is connected with the main wire layer of the CP copper wire (21).

4. A servo motor with a novel flat cable structure according to claim 2, characterized in that: The top surface of the middle layer (42) is provided with a second conductive area (46), and the bottom surface of the middle layer (42) is provided with a third conductive area (47), and the second conductive area (46) and the third conductive area (47) are connected with the shunt layer of the CP copper wire (21).

5. A servo motor with a novel flat cable structure according to claim 1, characterized in that: The skeleton (2) is provided with a plurality of winding columns (24) and fixing blocks (28) fixedly installed on the winding columns (24), the gap between the adjacent two winding columns (24) forms a winding groove (22), the CP copper wire (21) is inserted and installed on the top of the fixing block (28), the top of the fixing block (28) is provided with a top block (29) spaced from the circuit board (4), and the outer circumferential surface of the circuit board (4) is provided with a through hole (48) connected with the CP copper wire (21).

6. A servo motor with a novel flat cable structure according to claim 5, characterized in that: The inner sides of the fixing block (28) are provided with avoiding grooves (23), and the coil joint (31) of the coil winding (3) passes through the avoiding grooves (23) and is connected with the CP copper wire (21).

7. A servo motor with a novel flat cable structure according to claim 5, characterized in that: The middle part of the winding column (24) is provided with a stator tooth type groove (25), and the height size of the tooth type groove (25) is the same as the height size of the stator core (1).

8. A servo motor with a novel flat cable structure according to claim 7, characterized in that: The inner walls on both sides of the stator tooth type groove (25) are provided with side clamping parts (26), and the bottom of the stator tooth type groove (25) is provided with a clamping part (27).

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