Servo steering engine and antenna module

Abstract

The embodiment of the utility model relates to the technical field of motors, in particular to a servo steering engine and an antenna module, which are characterized in that a casing, a motor assembly and a circuit board assembly are designed, and a mounting cavity is arranged in the casing; the motor assembly is arranged in the mounting cavity, and the motor assembly is provided with a driving shaft and performs servo output through the driving shaft; the circuit board assembly comprises a first circuit board and a second circuit board, the first circuit board is electrically connected with the second circuit board, and the second circuit board is electrically connected with the motor assembly; wherein the first circuit board is arranged in the mounting cavity along a first direction, and the second circuit board is arranged in the mounting cavity along a second direction, so that the space utilization rate of the casing is improved. The space utilization rate is improved by optimizing the layout of the circuit board, and the servo steering engine has the advantages of improving the space utilization rate of the casing, reducing the size of the servo steering engine and improving the heat dissipation performance of circuit elements.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a servo motor and antenna module. Background Technology

[0002] Currently, servo motors generally use brushed DC motors as the drive core, combined with potentiometers or photoelectric encoders for position feedback, forming a closed-loop control system. This design is widely used in robotics, model aircraft, and industrial automation, but it has the following inherent drawbacks:

[0003] (1) Size and weight issues: Brushed motors require built-in brushes and commutator structures, resulting in large axial length and bulky overall size, which makes it difficult to meet the needs of modern lightweight equipment. At the same time, in the existing technology, the circuit components of servo motors are generally integrated on a circuit board, which results in the circuit board occupying a large space of the servo motor and poor heat dissipation performance between the circuit components.

[0004] (2) Efficiency and lifespan limitations: Mechanical friction of the brushes leads to high energy loss (efficiency is usually <70%), and is prone to generating sparks and electromagnetic interference. Brush wear limits lifespan (typical lifespan is about 50,000 cycles), requiring frequent maintenance. Utility Model Content

[0005] In view of the above problems, this utility model provides a servo motor and antenna module, which solves the problems of large size and weight, low efficiency and short life of existing brushed motors.

[0006] In a first aspect, this utility model provides a servo motor, comprising:

[0007] The casing has an internal mounting cavity.

[0008] A motor assembly is disposed within the mounting cavity, the motor assembly having a drive shaft and providing servo output through the drive shaft;

[0009] The system also includes a circuit board assembly, comprising a first circuit board and a second circuit board, wherein the first circuit board and the second circuit board are electrically connected, and the second circuit board is electrically connected to the motor assembly; wherein the first circuit board is disposed in the mounting cavity along a first direction, and the second circuit board is disposed in the mounting cavity along a second direction, so as to improve the utilization rate of the housing space.

[0010] In some alternative embodiments, the housing includes a main housing and a cover plate, the main housing having an installation opening and a slot provided on the side wall of the main housing, and the cover plate having a buckle; when the cover plate is closed on the installation opening, the buckle is engaged and fixed in the slot.

[0011] In some alternative embodiments, the cover plate is provided with a positioning pin, the first circuit board is provided with a positioning hole that matches the positioning pin, and the first circuit board is fixed to the cover plate along the positioning pin; the first circuit board is provided with a slot, the second circuit board is provided with a plug that matches the slot, and the second circuit board is vertically inserted into the first circuit board.

[0012] In some alternative configurations, the lower surface of the first circuit board is provided with a first pad, and the insert is provided with a second pad. When the second circuit board is inserted into the first circuit board, the first pad and the second pad are connected by a soldering strip. The second circuit board is also provided with a third pad for connection to the motor assembly.

[0013] In some alternative embodiments, the circuit board assembly further includes a connector whose connecting wires pass through a groove in the cover plate and connect to the first pad.

[0014] In some alternative embodiments, the motor assembly is further provided with an induction magnetic group, which includes a mounting base and a magnetic sheet. The upper end of the mounting base is provided with a connecting groove for connecting to the drive shaft, and the lower end of the mounting base is provided with a mounting groove for fixing the magnetic sheet. The first circuit board is provided with a Hall sensor, and the Hall sensor is arranged axially below the induction magnetic group along the motor assembly.

[0015] In some alternative embodiments, the second circuit board integrates an MCU module, a driver module, and a power management module. The power management module is connected to the MCU module, the driver module, and the Hall sensor. The MCU module is connected to the driver module and the Hall sensor to control the motor assembly drive.

[0016] In some alternative embodiments, a drive through hole is provided on one end face of the housing, and the drive through hole is connected to the mounting cavity; the motor assembly includes a motor body and a front cover disposed on the motor body, the front cover is provided with a sleeve, and the sleeve is disposed on the circumference of the drive shaft of the motor body; and when the front cover is fixed in the mounting cavity, the sleeve extends out along the drive through hole.

[0017] In some alternative configurations, the front cover has at least one first mounting hole on its side, and the main housing has a second mounting hole that mates with the first mounting hole. The first mounting hole and the second mounting hole are fixed in place by a pin.

[0018] Secondly,

[0019] This utility model provides an antenna module, including an antenna and the aforementioned servo motor, wherein the servo motor is driven and connected to the antenna to control the antenna to rotate.

[0020] This utility model provides a servo motor and antenna module, which has the following advantages: The utility model designs a housing, a motor assembly, and a circuit board assembly. The housing has a built-in mounting cavity; the motor assembly is disposed within the mounting cavity and has a drive shaft for servo output; the circuit board assembly includes a first circuit board and a second circuit board, which are electrically connected, and the second circuit board is electrically connected to the motor assembly; wherein the first circuit board is disposed within the mounting cavity along a first direction, and the second circuit board is disposed within the mounting cavity along a second direction, thereby improving the space utilization of the housing. This utility model improves space utilization by optimizing the circuit board layout, and has the advantages of improving housing space utilization, reducing the size of the servo motor, and improving the heat dissipation performance of circuit components.

[0021] The above description is merely an overview of the technical solutions of the present utility model embodiments. In order to better understand the technical means of the present utility model embodiments and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present utility model embodiments more obvious and understandable, specific embodiments of the present utility model are described below. Attached Figure Description

[0022] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of the brushless servo motor provided by the present invention is shown;

[0024] Figure 2 An exploded view of the brushless servo motor provided by the present invention is shown;

[0025] Figure 3 A cross-sectional schematic diagram of the brushless servo motor provided by the present invention is shown;

[0026] Figure 4 An exploded view of the circuit board assembly provided by the present invention is shown;

[0027] Figure 5 A cross-sectional schematic diagram of the circuit board assembly provided by the present invention is shown.

[0028] in,

[0029] 1. Housing; 11. Main housing; 111. Drive through hole; 112. Second mounting hole; 113. Slot; 12. Cover plate; 121. Receiving groove; 122. Positioning pin; 123. Buckle;

[0030] 2. Motor assembly; 21. Motor body; 211. Drive shaft; 22. Front cover; 221. First mounting hole; 23. Sleeve; 24. Induction magnetic assembly; 241. Fixing base; 242. Magnetic sheet;

[0031] 3. Circuit board assembly; 31. First circuit board; 311. Slot; 312. First pad; 313. Solder strip; 314. Positioning hole; 32. Second circuit board; 321. Insert; 322. Second pad; 323. Third pad; 33. Connector; 34. Hall sensor;

[0032] 4. Install the cavity. Detailed Implementation

[0033] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein.

[0034] Example 1:

[0035] Figure 1-5 The present invention illustrates a first embodiment of a servo motor, which includes a housing 1, a motor assembly 2, and a circuit board assembly 3. A mounting cavity 4 is formed inside the housing 1, and the motor assembly 2 is placed within the cavity and outputs power through a drive shaft 211. The circuit board assembly 3 includes a first circuit board 31 and a second circuit board 32 electrically connected to each other. The second circuit board 32 is electrically connected to the motor assembly 2. The first circuit board 31 is fixed to the mounting cavity 4 along a first direction, and the second circuit board 32 is fixed to the mounting cavity 4 along a second direction.

[0036] In this embodiment, the mounting cavity 4 refers to the three-dimensional accommodating space formed inside the housing 1. Specifically, it can be formed into a rectangular cavity using a stamping and stretching process, and is used to support the motor and circuit components. The drive shaft 211 refers to the rotating component that outputs power from the motor. Specifically, it can be made of a solid shaft made of stainless steel or high-carbon steel, and its end can be connected to an induction magnet. The first direction and the second direction refer to the non-parallel layout in space. Specifically, it can be achieved by using mutually perpendicular mounting angles. For example, the first circuit board 31 is horizontally mounted on the top of the housing 1, and the second circuit board 32 is vertically mounted on the side wall of the housing 1.

[0037] Specifically, the motor assembly 2 is fixed to one side of the mounting cavity 4, and its drive shaft 211 extends in the same direction as the length of the housing 1. The first circuit board 31 is arranged horizontally along the top surface of the housing 1, and the second circuit board 32 is arranged vertically along the side surface of the housing 1. The two circuit boards transmit electrical signals through an edge connector 33. The second circuit board 32 is arranged close to the control terminals of the motor assembly 2, which shortens the transmission distance of the drive line. This layout decomposes the top plane space originally occupied by a single circuit board into a combined space of the top and sides, effectively improving the utilization rate of the cavity space.

[0038] Compared with existing technologies, traditional servo motors use a single circuit board for flat mounting, resulting in insufficient utilization of the space in the height direction of the cavity. This solution uses a dual-circuit board three-dimensional mounting, distributing the circuit system across multiple spatial dimensions, which reduces the planar projection area while retaining necessary heat dissipation gaps. Simultaneously, the separate design of the dual circuit boards reduces the risk of electromagnetic interference and improves signal stability.

[0039] Through the above technical solution, this application achieves three-dimensional utilization of the internal space of the housing 1, enabling the servo to reduce its overall size while maintaining the same functionality. The separate layout of the dual circuit boards not only optimizes the heat dissipation channel but also facilitates modular maintenance and replacement. With improved space utilization, more sensing elements can be integrated within the same volume, enhancing the control precision of the servo.

[0040] Example 2:

[0041] Based on Embodiment 1, this embodiment further defines the housing 1, motor assembly 2, and circuit board assembly 3 of the servo motor of Embodiment 1. In one embodiment, the housing 1 includes a main housing 11 and a cover plate 12. The main housing 11 has an installation opening and a slot 113 is provided on the side wall of the main housing 11. The cover plate 12 is provided with a buckle 123. When the cover plate 12 is closed on the installation opening, the buckle 123 is engaged and fixed in the slot 113.

[0042] In this embodiment, the main housing 11 refers to the basic structural component that supports the mounting cavity 4. Specifically, it can be implemented using a stamped and stretched aluminum alloy housing, with a slot 113 on its side wall for forming a snap-fit ​​positioning structure. The latch 123 refers to an elastic protrusion extending from the edge of the cover plate 12, which can be implemented using a plastic part integrally injection molded with the cover plate 12. Through elastic deformation, it forms a detachable mechanical lock with the slot 113. The slot 113 refers to an inner groove on the side wall of the main housing 11, which can be implemented using machining or mold forming. It is used to form a spatial fit with the latch 123 to limit the displacement of the cover plate 12.

[0043] Specifically, the main housing 11 forms an assembly entrance for the cavity through an installation opening, and the cover plate 12 acts as a closure to cover this opening. The engagement of the latch 123 and the slot 113 requires no auxiliary fasteners. When the cover plate 12 is pressed vertically into the installation opening, the latch 123 is elastically deformed by the pressure from the side wall of the main housing 11 until it is fully embedded in the slot 113, at which point it returns to its original shape and locks in place. This structure ensures a surface contact seal between the cover plate 12 and the main housing 11, while eliminating assembly gaps caused by traditional screw fastening.

[0044] Compared with existing technologies, conventional servo motors often use screws to fix the cover plate 12 to the housing, requiring pre-drilled screw holes and multiple screws on the side wall of the housing. This results in low assembly efficiency and makes the sealing performance susceptible to loosening of the screws. This solution reduces the number of parts and achieves tool-less assembly through the direct engagement of the snap-fit ​​123 and the slot 113.

[0045] Through the above technical solution, this application effectively solves the problems of low assembly efficiency and difficult maintenance caused by the screw fixing method of traditional servo motors, while avoiding the structural stability risk caused by loose fasteners, thereby improving the overall assembly accuracy and reliability of the housing 1.

[0046] In one embodiment of this invention, a servo motor includes a housing 1, a motor assembly 2, and a circuit board assembly 3. The housing 1 includes a main housing 11 and a cover plate 12. The main housing 11 has an installation opening and a slot 113 is provided on the side wall of the main housing 11. The cover plate 12 is provided with a buckle 123. When the cover plate 12 is closed over the installation opening, the buckle 123 is engaged and fixed in the slot 113. A positioning pin 122 is provided on the cover plate 12. A first circuit board 31 is provided with a positioning hole 314 that matches the positioning pin 122. The first circuit board 31 is fixed to the cover plate 12 along the positioning pin 122. The first circuit board 31 is provided with a slot 311. A second circuit board 32 is provided with a plug 321 that matches the slot 311. The second circuit board 32 is vertically inserted into the first circuit board 31.

[0047] The positioning pin 122 is a columnar structure used to determine the mounting position of the first circuit board 31. It can be made of metal or plastic and is fixed to the cover plate 12 by pressing or injection molding, thus limiting lateral displacement of the circuit board. The positioning hole 314 is a through hole that matches the shape of the positioning pin 122. It can be machined by drilling or stamping in the edge area of ​​the first circuit board 31, enabling rapid positioning of the circuit board through the cooperation of the hole and the pin. The slot 311 is a recessed structure for accommodating the insert block 321. It can be formed by cutting an opening in the PCB board and guides the second circuit board 32 to be inserted vertically. The insert block 321 is a protruding structure that matches the slot 311. It can be formed by metal pins or an extension of the PCB board, enabling electrical and mechanical connection between the two circuit boards through a plug-in connection.

[0048] Specifically, after the cover plate 12 and the main housing 11 are assembled using snap fasteners 123 and slots 113, the first circuit board 31 is fitted onto the positioning pins 122 of the cover plate 12 through positioning holes 314, keeping the circuit board relatively fixed to the cover plate 12. After the insert block 321 of the second circuit board 32 is inserted into the slot 311 of the first circuit board 31, the two circuit boards form a vertically intersecting layout, effectively reducing the space occupied in the plane. The contact surface between the insert block 321 and the slot 311 can achieve electrical conductivity through welding or elastic contact, thereby completing the signal transmission between the two circuit boards.

[0049] Compared with existing technologies, traditional servo motors typically use a single horizontally arranged circuit board, resulting in low internal space utilization and limited heat dissipation paths for components. This invention, however, utilizes a vertically inserted double-layer circuit board structure, increasing component density within the same housing volume while simultaneously creating a three-dimensional heat dissipation channel. The engagement mechanism between the positioning pin 122 and the positioning hole 314 eliminates the installation space required by traditional screw fixing methods, further optimizing structural compactness.

[0050] Through the above technical solution, this application achieves precise and rapid assembly of the circuit board assembly 3, reducing the time required for installation procedures. The double-layer vertical layout of the circuit board structure improves the utilization rate of the internal space of the housing 1, leaving more space for the motor assembly 2 and other functional modules. The plug-in connection method reduces the amount of cables used, avoids heat dissipation problems caused by messy wire harnesses, and enhances the structural stability of the circuit board assembly 3 under vibration environments.

[0051] In one embodiment of this invention, a first pad 312 is provided on the lower surface of the first circuit board 31, and a second pad 322 is provided on the insert block 321. When the second circuit board 32 is inserted into the first circuit board 31, the first pad 312 and the second pad 322 are connected by a soldering strip 313. The second circuit board 32 is also provided with a third pad 323 that is connected to the motor assembly 2.

[0052] In this embodiment, the first pad 312 refers to the conductive area disposed on the lower surface of the first circuit board 31. Specifically, it can be formed by etching copper foil material to achieve electrical connection with the second circuit board 32. Its surface can be covered with an anti-oxidation coating to enhance stability.

[0053] The second pad 322 refers to the conductive area located at the end of the plug 321. It can be gold-plated and used to form a contact surface with the first pad 312. Its thickness can be controlled within the range of 0.1 mm to 0.3 mm to adapt to the soldering process.

[0054] Solder strip 313 refers to the conductive medium connecting the first pad 312 and the second pad 322. It can be formed by curing solder paste through reflow soldering process. Its width can match the pad size to ensure mechanical strength and conductivity.

[0055] The third pad 323 refers to the conductive area located on the edge of the second circuit board 32. Specifically, it can be connected to the internal circuit layer through a metallized through-hole to achieve electrical connection with the wires or connectors of the motor assembly 2.

[0056] Specifically, when the first circuit board 31 and the second circuit board 32 are assembled using a vertical insertion method, after the insert 321 is inserted into the slot 311, the first solder pad 312 and the second solder pad 322 are fixedly connected by the soldering strip 313. This connection method eliminates the need for additional cables, reducing horizontal space occupation. The third solder pad 323 is located at the end of the second circuit board 32 and is directly connected to the power or signal interface of the motor assembly 2 via a wire, avoiding interference caused by excessively long signal transmission paths. After curing, the soldering strip 313 forms a stable mechanical support and simultaneously achieves electrical conductivity between the two circuit boards.

[0057] Compared with existing technologies, traditional servo motors use a single horizontally arranged circuit board, requiring connecting wires or connectors between boards, which not only occupies space but also easily leads to poor contact. This solution integrates electrical connection and mechanical fixing functions by vertically inserting and directly soldering to pads, effectively reducing assembly layers and eliminating impedance mismatch problems introduced by connectors.

[0058] Through the above technical solution, this application solves the problems of low space utilization and poor inter-board connection reliability of traditional servo motor circuit boards. It achieves efficient assembly of multi-layer circuits within a limited cavity space, reduces the risk of contact failure, and improves signal transmission stability.

[0059] In one embodiment of this invention, the circuit board assembly 3 further includes a connector 33, the connecting wires of the connector 33 passing through the wire groove of the cover plate 12 and connecting to the first solder pad 312.

[0060] In this embodiment, connector 33 refers to an interface element used to establish an electrical connection. Specifically, it can be implemented using a combination structure of metal contacts and an insulating housing, such as a pin header connector 33 or a snap-fit ​​connector 123, used to achieve a detachable connection between external devices and the circuit board. The wire channel refers to a groove or through-hole structure formed on the surface of the cover plate 12, which can be formed by injection molding or machining, used to define the direction of the connecting wire harness and prevent interference with internal components of the housing. The first solder pad 312 refers to a metallized solder joint area located on the lower surface of the first circuit board 31, which can be formed using a copper plating process, used to achieve a fixed connection with the connecting wire harness through soldering.

[0061] Specifically, the connecting wire harness is guided to the first solder pad 312 position through the wire groove of the cover plate 12. The constraint effect of the wire groove ensures that the wire harness is arranged in an orderly manner within a limited space. The conductor ends of the connecting wire harness are physically connected and electrically conductively connected to the first solder pad 312 by welding. After the welding rod 313 melts at high temperature, it covers the contact surface between the solder pad and the wire harness to form a stable bond. When the cover plate 12 is assembled with the main housing 11, the size of the wire groove is set to be slightly larger than the outer diameter of the wire harness to avoid excessive compression. The housing part of the connector 33 is embedded in the edge of the wire groove opening to form an anti-detachment structure.

[0062] Compared with existing technologies, traditional servo motors involve directly soldering external cables to the circuit board, resulting in low assembly efficiency and difficult maintenance. The wire harnesses are also messy and prone to tangling with the internal structure. This solution uses a wire groove guide and connector 33 fixing structure to precisely control the wire harness routing. Simultaneously, the pluggable nature of connector 33 simplifies the assembly process, and the isolation space formed by the wire groove reduces the risk of friction between the wire harness and the motor assembly 2.

[0063] Through the above technical solution, this application solves the problem of reduced internal space utilization caused by disordered arrangement of external connection harnesses. The wire channel structure allows the harness to extend along a predetermined path, avoiding positional conflicts with the circuit board soldering area. The matching design of connector 33 and wire channel enables rapid positioning and installation of the harness, reducing the number of manual steps for adjusting the harness routing. At the same time, the detachable connection method provides convenient conditions for subsequent maintenance.

[0064] In one embodiment of this invention, the second circuit board 32 integrates an MCU module, a driver module, and a power management module. The power management module is connected to the MCU module, the driver module, and the Hall sensor 34. The MCU module is connected to the driver module and the Hall sensor 34 to control the drive of the motor assembly 2.

[0065] In this embodiment, the MCU module refers to a microcontroller unit, which can be implemented using an embedded chip integrated logic unit. It receives signals from the Hall sensor 34 and generates control commands. The drive module refers to a power amplifier unit, which can be implemented using an H-bridge circuit integrated with a transistor array. It converts the control signals output by the MCU module into current to drive the motor. The power management module refers to a multi-channel power distribution unit, which can be implemented using a combination of voltage conversion chips and filter capacitors. It provides independent regulated power supplies for the MCU module, drive module, and Hall sensor 34. The module connection method refers to using copper foil traces embedded in the circuit board for electrical signal transmission. This can be achieved through a layered wiring process, thereby eliminating the space occupation caused by external wiring harness connections.

[0066] Specifically, the MCU module analyzes the position data of the magnetic plate 242 collected by the Hall sensor 34 to calculate the real-time angular deviation of the motor drive shaft 211, and then sends a pulse width modulation signal to the drive module. The drive module adjusts the direction and intensity of the current output to the motor windings based on this signal to achieve precise rotation of the drive shaft 211. The power management module provides a stable logic voltage to the MCU module, a high-power drive voltage to the drive module, and a low-noise detection voltage to the Hall sensor 34 through independent power supply channels. The integrated layout of each module reduces the circuit board area, while utilizing a vertical heat dissipation path to improve heat conduction efficiency.

[0067] Compared with existing technologies, traditional servo motors require the control circuit, power circuit, and power supply circuit to be distributed on a single circuit board, resulting in cross-interference and low heat dissipation efficiency. This solution, through modular integration and layered power supply design, achieves physical isolation between control signals and power current, reducing the impact of electromagnetic interference on sensor accuracy. At the same time, the integrated layout reduces the space occupied by the circuit board by approximately 40%.

[0068] Through the above technical solution, this application solves the problems of poor heat dissipation and low space utilization caused by the integration of multiple circuit components. By vertically stacking functional modules and designing independent power supplies, it achieves the coordinated operation of high-precision control and high-efficiency drive within a limited space. For example, the independent voltage regulation design of the power management module can reduce the noise of the Hall sensor 34 signal to below 5mV, while the H-bridge circuit of the drive module can improve the motor response speed to the order of 0.01 seconds, thereby significantly improving the control accuracy and operational stability of the servo system.

[0069] In one embodiment of this invention, the servo motor has a drive through hole 111 on one end face of the housing 1, which communicates with the mounting cavity 4. The motor assembly 2 includes a motor body 21 and a front cover 22 disposed on the motor body 21. The front cover 22 is provided with a sleeve 23, which is disposed around the drive shaft 211 of the motor body 21. When the front cover 22 is fixed in the mounting cavity 4, the sleeve 23 extends out along the drive through hole 111. The side of the front cover 22 is provided with at least one first mounting hole 221, and the main housing 11 is provided with a second mounting hole 112 that cooperates with the first mounting hole 221. The first mounting hole 221 and the second mounting hole 112 are positioned and fixed by a pin.

[0070] In this embodiment, the drive through hole 111 refers to the through hole opened on the end face of the housing 1, which can be implemented using a circular or irregularly shaped hole structure. Its function is to provide a channel for the extension of the sleeve 23, preventing the drive shaft 211 from being directly exposed to the external environment. The sleeve 23 refers to the tubular structure surrounding the drive shaft 211, which can be made of metal or engineering plastic. Its function is to form a protective barrier during the movement of the drive shaft 211, reducing frictional loss caused by the intrusion of external foreign objects. The first mounting hole 221 and the second mounting hole 112 refer to the positioning holes 314 respectively provided on the side of the front cover 22 and the main housing 11. They can be implemented using threaded holes or smooth holes. Their function is to achieve quick positioning and fixation between the front cover 22 and the main housing 11 through the pin, ensuring the positional accuracy of the motor body 21 within the mounting cavity 4.

[0071] Specifically, during assembly, the front cover 22 is aligned with the second mounting hole 112 of the main housing 11 through the first mounting hole 221, and then a pin is inserted to secure it. At this time, the sleeve 23 extends from the drive through hole 111, so that the drive shaft 211 is wrapped inside the sleeve 23, forming a guide structure for axial movement. Due to the clearance fit between the sleeve 23 and the drive through hole 111, the drive shaft 211 can avoid direct contact with the housing 1 when rotating, thereby reducing frictional resistance. Furthermore, the positioning method of the pin makes the connection between the front cover 22 and the main housing 11 more stable, preventing positional displacement caused by vibration or impact.

[0072] Compared with existing technologies, traditional servo motors typically expose the drive shaft 211 directly to the outside of the housing 1, making it susceptible to dust or liquid intrusion and accelerating the wear of internal components. This design, however, uses the sleeve 23 in conjunction with the drive through-hole 111 to create a sealed, isolated space while ensuring the normal movement of the drive shaft 211. Furthermore, in existing technologies, the motor assembly 2 is often directly bolted to the housing 1, and the installation accuracy depends on the operator's experience, easily leading to positional deviations. This design uses a pin-and-mounting-hole connection, enabling rapid positioning and improving assembly efficiency and consistency.

[0073] Through the above technical solutions, this application achieves effective isolation between the drive shaft 211 and the external environment, reducing the failure rate caused by foreign object intrusion. At the same time, the pin positioning structure improves the installation accuracy of the motor assembly 2, ensuring the stability and reliability of the servo motor during long-term operation.

[0074] In one embodiment of this invention, the front cover 22 has at least one first mounting hole 221 on its side, and the main housing 11 has a second mounting hole 112 that mates with the first mounting hole 221. The first mounting hole 221 and the second mounting hole 112 are fixed together by a pin. The first mounting hole 221 is a through hole or blind hole formed on the side of the front cover 22, which can be achieved by machining or injection molding, and is used to form a fixed connection structure with the front cover 22. The second mounting hole 112 is a through hole or blind hole formed on the main housing 11, which can be achieved by stamping, and is used to form a fixed connection structure with the main housing 11. The pin is a cylindrical or conical metal or non-metal connector, such as stainless steel or nylon, used to pass through the first mounting hole 221 and the second mounting hole 112 for mechanical positioning and fixation.

[0075] Specifically, at least one first mounting hole 221 is machined into the side of the front cover 22, and a second mounting hole 112 is machined into the corresponding position on the main housing 11. When the front cover 22 is assembled with the main housing 11, a pin is inserted into the first mounting hole 221 and the second mounting hole 112. The axial and circumferential positioning of the front cover 22 and the main housing 11 is achieved by the rigid constraint of the pin. When the motor assembly 2 is installed into the mounting cavity 4 of the main housing 11, the front cover 22 remains stable due to the fixed relationship between the pin and the main housing 11, preventing the motor body 21 from shifting due to vibration or load changes.

[0076] In some specific embodiments, the first mounting hole 221 can be set as two circular holes symmetrically distributed on both sides of the front cover 22, and the second mounting hole 112 is correspondingly set as two circular holes. The pin can be pressed into the hole by interference fit or screwed into the hole by threaded connection.

[0077] Compared with existing technologies, the front cover 22 of a traditional servo motor is usually fixed to the housing with screws or clips 123, which has the problems of low installation accuracy and easy loosening. However, by using the cooperation of pins and mounting holes, high-precision positioning can be achieved, avoiding motor shaft misalignment caused by accumulated tolerances during assembly, and reducing the risk of structural loosening caused by vibration.

[0078] Through the above technical solution, this application achieves precise positioning and reliable fixation between the front cover 22 and the main housing 11, improves the stability of the motor assembly 2 in the mounting cavity 4, reduces transmission errors and mechanical wear caused by structural displacement, thereby improving the servo motor's operating accuracy and service life.

[0079] Example 3:

[0080] Based on Embodiment 1 or Embodiment 2, the servo motor of this application can be applied to an antenna module. Specifically, the antenna module may include an antenna and the servo motor of Embodiment 1 or Embodiment 2. The servo motor is connected to the antenna drive to control the antenna to rotate.

[0081] In this embodiment, the antenna module refers to a combined device integrating an antenna and a drive structure. Specifically, it can be implemented using an antenna with signal receiving or transmitting functions in conjunction with a servo motor. The servo motor provides driving power, enabling the antenna to adjust its direction or angle. The servo motor refers to a drive device comprising a motor assembly 2 and a circuit board assembly 3. Specifically, it can be implemented using a housing 1 structure with an internal mounting cavity 4. Optimizing the circuit board layout improves space utilization and heat dissipation performance. The drive connection refers to the power transmission method between the servo motor and the antenna. Specifically, it can be implemented using mechanical transmission components such as gear sets or couplings. The servo motor output shaft drives the antenna to rotate, achieving precise control.

[0082] Specifically, the servo motor assembly 2 outputs power to the outside via drive shaft 211. The circuit board assembly 3 includes a first circuit board 31 and a second circuit board 32 arranged in different directions, which are connected by plug-in and soldering methods to reduce space occupation and improve heat dissipation efficiency. The servo motor is connected to the antenna's transmission components, such as gear sets or linkage mechanisms, via drive shaft 211, thereby driving the antenna to rotate around the axis. The control module in the circuit board assembly 3 adjusts the motor output according to external commands to achieve precise adjustment of the antenna angle.

[0083] Compared with existing technologies, conventional servo motors use a single circuit board layout, resulting in low space utilization and limited heat dissipation. This solution optimizes space usage by arranging circuit boards in multiple directions, and uses modular connections to reduce assembly complexity. Traditional antenna drive devices use large and inefficient servo motors, while this solution integrates a high-efficiency motor assembly 2 with a compact circuit board structure, reducing overall weight and improving control accuracy.

[0084] Through the above technical solution, this application solves the problems of bulky servo motors and poor heat dissipation of circuit boards in existing antenna modules. By optimizing the circuit board layout and drive connection method, a more compact structural design is achieved, while improving heat dissipation efficiency and control stability, and extending the service life of the equipment.

[0085] The algorithms or displays provided herein are not inherently related to any particular computer, virtual system, or other device. Furthermore, the embodiments of this invention are not directed to any particular programming language.

[0086] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. Similarly, for the sake of brevity and to aid in understanding one or more aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. The claims, which follow the detailed description, are hereby expressly incorporated into that detailed description, wherein each claim itself constitutes a separate embodiment of the invention.

[0087] Those skilled in the art will understand that the modules in the device of the embodiment can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiment can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components, except that at least some of such features and / or processes or units are mutually exclusive.

[0088] It should be noted that the above embodiments are illustrative of the present invention and not restrictive of it, and those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims listing several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order of execution.

Claims

1. A servo motor, characterized in that, include: Housing (1), internal mounting cavity (4); A motor assembly (2) is disposed within the mounting cavity (4), the motor assembly (2) having a drive shaft (211) and performing servo output through the drive shaft (211); The circuit board assembly (3) includes a first circuit board (31) and a second circuit board (32), wherein the first circuit board (31) and the second circuit board (32) are electrically connected, and the second circuit board (32) is electrically connected to the motor assembly (2); wherein the first circuit board (31) is disposed in the mounting cavity (4) along a first direction, and the second circuit board (32) is disposed in the mounting cavity (4) along a second direction, so as to improve the space utilization of the housing (1).

2. The servo motor according to claim 1, characterized in that, The housing (1) includes a main housing (11) and a cover plate (12). The main housing (11) has an installation opening and a slot (113) is provided on the side wall of the main housing (11). The cover plate (12) is provided with a buckle (123). When the cover plate (12) is closed on the installation opening, the buckle (123) is engaged and fixed in the slot (113).

3. The servo motor according to claim 2, characterized in that, The cover plate (12) is provided with a positioning pin (122), and the first circuit board (31) is provided with a positioning hole (314) that matches the positioning pin (122). The first circuit board (31) is fixed on the cover plate (12) along the positioning pin (122). The first circuit board (31) is provided with a slot (311), and the second circuit board (32) is provided with a plug (321) that matches the slot (311). The second circuit board (32) is vertically inserted into the first circuit board (31).

4. The servo motor according to claim 3, characterized in that, The first circuit board (31) has a first pad (312) on its lower surface and the plug (321) has a second pad (322). When the second circuit board (32) is plugged into the first circuit board (31), the first pad (312) and the second pad (322) are connected by a soldering strip (313). The second circuit board (32) also has a third pad (323) connected to the motor assembly (2).

5. The servo motor according to claim 4, characterized in that, The circuit board assembly (3) also includes a connector (33), whose connecting wires pass through the wire groove of the cover plate (12) and connect to the first pad (312).

6. The servo motor according to claim 1, characterized in that, The motor assembly (2) is also provided with an induction magnetic group (24), which includes a fixed base (241) and a magnetic sheet (242). The upper end of the fixed base (241) is provided with a connecting groove for connecting to the drive shaft (211), and the lower end of the fixed base (241) is provided with a mounting groove for fixing the magnetic sheet (242). The first circuit board (31) is provided with a Hall sensor (34), and the Hall sensor (34) is arranged axially below the induction magnetic group (24) along the motor assembly (2).

7. The servo motor according to claim 6, characterized in that, The second circuit board (32) integrates an MCU module, a drive module and a power management module. The power management module is connected to the MCU module, the drive module and the Hall sensor (34). The MCU module is connected to the drive module and the Hall sensor (34) to control the drive of the motor assembly (2).

8. The servo motor according to claim 2, characterized in that, The housing (1) has a drive through hole (111) on one end face, which is connected to the mounting cavity (4); the motor assembly (2) includes a motor body (21) and a front cover (22) on the motor body (21), the front cover (22) is provided with a sleeve (23), and the sleeve (23) is located around the drive shaft (211) of the motor body (21); and when the front cover (22) is fixed in the mounting cavity (4), the sleeve (23) extends along the drive through hole (111).

9. The servo motor according to claim 8, characterized in that, The front cover (22) has at least one first mounting hole (221) on its side, and the main housing (11) has a second mounting hole (112) that cooperates with the first mounting hole (221). The first mounting hole (221) and the second mounting hole (112) are fixed by a pin.

10. An antenna module, characterized in that, The device includes an antenna and a servo motor as described in any one of claims 1-9, wherein the servo motor is driven connected to the antenna to control the antenna to rotate.

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