Galvanometer motor casing structure and galvanometer motor

Abstract

The invention relates to a galvanometer motor shell structure and a galvanometer motor, and the galvanometer motor shell structure comprises a cylindrical motor shell; the two heat dissipation grooves are symmetrically formed in the outer surface of the motor shell and extend in the axis direction of the motor shell; the at least one heat dissipation convex rib is arranged in the heat dissipation groove; in an installation state, the central surface of the heat dissipation groove is perpendicular to and equally divides the shell coil winding, so that the influence of the heat dissipation groove on the magnetic force of the motor shell is reduced, heat dissipation is carried out through the heat dissipation groove, and the problem that a large amount of joule heat is generated in the operation process of an existing galvanometer motor and the service life of the galvanometer motor is prolonged can be solved. And the temperature rise of core components (coils and permanent magnets) of the motor is caused, so that the dynamic control stability of the motor is influenced.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a galvanometer motor housing structure and a galvanometer motor. Background Technology

[0002] A galvanometer motor is a high-speed precision oscillating actuator based on the principle of electromagnetic drive. Its core working mechanism relies on the Lorentz force effect. Under ideal working conditions, the torque on the shaft of the galvanometer motor is strictly linearly positively correlated with the input current. However, in actual high-speed and high-frequency working scenarios, the galvanometer motor generates a large amount of Joule heat during operation, which causes the core components of the motor (coil and permanent magnet) to experience temperature rise, thereby affecting the stability of the motor's dynamic control. Summary of the Invention

[0003] This application provides a galvanometer motor housing structure and a galvanometer motor, which can solve the problem that existing galvanometer motors generate a lot of Joule heat during operation, causing the core components (coils, permanent magnets) of the motor to heat up, thereby affecting the dynamic control stability of the motor.

[0004] In a first aspect, embodiments of this application provide a galvanometer motor housing structure, including: Motor housing, the motor housing being cylindrical; Two heat dissipation grooves are symmetrically provided on the outer surface of the motor housing and extend along the axial direction of the motor housing; At least one heat dissipation rib is disposed within the heat dissipation groove; In the installed state, the center plane of the heat dissipation groove is perpendicular to and bisects the housing coil winding, so as to reduce the influence of the heat dissipation groove on the magnetic force of the motor housing and dissipate heat through the heat dissipation groove.

[0005] In some embodiments, the at least one heat dissipation rib is a plurality of heat dissipation ribs, and the plurality of heat dissipation ribs are arranged at intervals along the inner edge of the heat dissipation groove.

[0006] In some embodiments, the heat dissipation rib extends from the inner edge of the heat dissipation groove outward from the heat dissipation groove and is located within the outer contour line of the motor housing.

[0007] In some embodiments, the heat dissipation groove is a circular groove or a rectangular groove.

[0008] In some embodiments, a rotor receiving cavity is provided on the end face of the motor housing, the rotor receiving cavity extends along the axial direction of the motor housing, and a coil receiving groove is also provided between the rotor receiving cavity and the inner wall of the motor housing, the coil receiving groove being used to place the housing coil winding.

[0009] In some embodiments, the center distance between the heat dissipation groove and the center of the motor housing is 0.3x(R1-R2)≤(R1-R3)≤0.5x(R1-R2). Where R1 is the outer diameter of the motor housing, R2 is the inner diameter of the motor housing, and R3 is the center distance of the groove.

[0010] Secondly, embodiments of this application provide a galvanometer motor, comprising: The galvanometer motor housing structure as described in any one of the first aspects; The housing coil winding is arranged within the galvanometer motor housing structure with the center plane of the heat dissipation groove as the symmetrical plane; The magnet assembly is rotatably mounted inside the motor housing; An encoding component is located at one end of the motor housing and is connected to the magnet assembly; The galvanometer lens is connected to the end of the magnet assembly that is furthest from the encoding assembly.

[0011] In some embodiments, the magnet assembly includes: The rotating shaft mechanism is located within the rotor receiving cavity of the motor housing; The rotor magnet is disposed in the rotating shaft mechanism and is located within the coverage area of ​​the housing coil winding.

[0012] In some embodiments, the rotating shaft mechanism includes: The rotor shaft passes through the rotor receiving cavity of the motor housing and is connected to the encoding assembly, and the rotor magnet is provided on it; A rotor bearing is disposed between the rotor shaft and the motor housing to support the rotor shaft.

[0013] In some embodiments, the encoding component includes: An encoder is located at one end of the motor housing and connected to the rotor shaft, and is used to detect the rotation parameters of the rotor shaft; An encoder cover is placed over the encoder and connected to the end face of the motor housing.

[0014] The technical solutions provided in this application have the following advantages compared with the prior art: The galvanometer motor housing structure and galvanometer motor provided in this application embodiment increase the contact area between the motor housing and the air compared to a smooth cylindrical surface by providing an axially extending heat dissipation groove on the outer surface of the motor housing. By adding heat dissipation ribs in the heat dissipation groove, the heat dissipation path and heat exchange area are further extended, which can accelerate the conduction and dissipation of heat in the motor housing and effectively reduce the temperature rise of the coil and permanent magnet. By making the center plane of the heat dissipation groove perpendicular to and bisecting the housing coil winding, the asymmetrical cutting of the groove on the stator magnetic circuit can be effectively offset, reducing the magnetic field distortion caused by changes in the housing structure. This can solve the problem that existing galvanometer motors generate a lot of Joule heat during operation, causing the core components (coil and permanent magnet) of the motor to rise in temperature, which in turn affects the dynamic control stability of the motor. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 This is a schematic diagram of the galvanometer motor housing structure provided in one embodiment of this application; Figure 2 This is a magnetic field distribution diagram of a conventional galvanometer motor provided in an embodiment of this application; Figure 3 A magnetic flux density distribution diagram of a conventional galvanometer motor provided in an embodiment of this application; Figure 4 This is a schematic diagram of a galvanometer motor structure provided in an embodiment of this application; Figure 5 A magnetic field distribution diagram of a galvanometer motor provided in an embodiment of this application; Figure 6 A magnetic flux density distribution diagram of a galvanometer motor provided in an embodiment of this application; Figure 7 The diagram showing the relationship between (R1-R3) / (R1-R2) and output torque T0 is provided for an embodiment of this application.

[0019] Figure label: 10. Motor housing; 110. Heat dissipation groove; 120. Heat dissipation ribs; 20. Shell coil winding; 30. Magnet assembly; 310. Rotor bearing; 320. Rotor shaft; 330. Rotor magnet; 40. Encoding components; 410. Encoder; 420. Encoding cover plate; 50. Galvanometer lens. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0022] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0023] A galvanometer motor is a high-speed, precision oscillating actuator based on electromagnetic drive principles. Its core working mechanism relies on the Lorentz force effect: when a drive current is applied to the motor coil, the coil, placed in the steady-state magnetic field of a permanent magnet, generates an Ampere force that is positively correlated with the current intensity and magnetic induction intensity. This Ampere force is further converted into rotational torque, driving the rotor and coupled reflector assembly to complete high-precision angular displacement motion. With its rapid response and precise positioning characteristics, the galvanometer motor has become a core actuator for high-speed scanning operations in fields such as laser marking, laser cutting, optical scanning, and beam pointing.

[0024] Under ideal operating conditions, the torque on the galvanometer motor shaft is strictly linearly positively correlated with the input current, which lays the foundation for the precise closed-loop control of the system. However, in actual high-speed and high-frequency operating scenarios, there are significant energy losses during motor operation: on the one hand, the large current continuously flowing through the coil generates Joule heat; on the other hand, the eddy current losses caused by the alternating magnetic field in the magnetic circuit are also converted into heat. The superposition of these two types of losses leads to a significant temperature rise in the core components of the motor (coil and permanent magnet).

[0025] Prolonged operation at high temperatures can lead to a series of negative effects: First, the coil resistance increases with temperature, disrupting the linear relationship between torque and input current, directly reducing the dynamic control stability of the motor and affecting scanning accuracy. Second, excessively high temperatures can cause irreversible demagnetization of the permanent magnet, leading to a decrease in magnetic field strength, which in turn causes performance degradation problems such as reduced motor output torque and slower response speed, and in severe cases, may even shorten the motor's lifespan. Therefore, how to effectively suppress the temperature rise of the galvanometer motor and ensure its stable operation under high-frequency heavy-load conditions has become a key issue that urgently needs to be addressed in the technological iteration and upgrading of galvanometer motors.

[0026] Firstly, such as Figure 1-7 As shown, to address the aforementioned technical problems, this application provides a galvanometer motor housing structure, including: Motor housing 10, the motor housing 10 is cylindrical; Two heat dissipation grooves 110 are symmetrically provided on the outer surface of the motor housing 10 and extend along the axial direction of the motor housing 10; At least one heat dissipation rib 120 is disposed in the heat dissipation groove 110; In the installed state, the center plane of the heat dissipation groove 110 is perpendicular to and bisects the housing coil winding 20, so as to reduce the influence of the heat dissipation groove 110 on the magnetic force of the motor housing 10 and dissipate heat through the heat dissipation groove 110.

[0027] It should be noted that, as Figure 1 As shown, by providing an axial heat dissipation groove 110 on the outer surface of the motor housing 10, the contact area between the motor housing 10 and the air is directly increased compared to a smooth cylindrical surface. The heat dissipation ribs 120 added inside the heat dissipation groove 110 further extend the heat dissipation path and heat exchange area, which can accelerate the conduction and dissipation of heat on the surface of the motor housing 10, improve the efficiency of natural convection heat dissipation, and effectively reduce the temperature rise of the coil and permanent magnet caused by Joule heat and eddy current loss. Moreover, the heat dissipation groove 110 extending along the axial direction of the motor housing 10 can serve as an airflow guiding channel, guiding air to flow quickly along the axial direction across the housing surface during motor operation, forming a directional convection airflow, which carries away the heat accumulated on the housing surface. This is especially suitable for laser scanning, marking and other working conditions that require continuous high-speed operation, avoiding performance degradation caused by heat accumulation.

[0028] It should be noted that by making the center plane of the heat dissipation groove 110 perpendicular to and bisecting the housing coil winding 20, the groove structure is symmetrically distributed in the radial direction (vertical center line) of the motor. This effectively counteracts the asymmetrical cutting of the stator magnetic circuit by the groove, reduces magnetic field distortion caused by changes in the housing structure, maintains the uniformity of the permanent magnet magnetic field, and ensures a strict linear relationship between torque and input current under ideal operating conditions, laying the foundation for high-precision position control of the motor. Furthermore, the symmetrically arranged heat dissipation groove 110 and the embedded rib structure do not disrupt the magnetic circuit continuity of the motor housing 10. Compared with asymmetrical slotting or surface opening designs, this reduces the loss of magnetic conductivity of the housing, avoids magnetic field strength attenuation due to increased magnetic resistance, ensures the stability of the motor output torque, and prevents the risk of demagnetization of the permanent magnet from escalating.

[0029] In some embodiments, at least one heat dissipation rib 120 may be a plurality of heat dissipation ribs 120, and the plurality of heat dissipation ribs 120 are arranged at intervals along the inner edge of the heat dissipation groove 110.

[0030] It should be noted that multiple heat dissipation ridges 120 (such as 5 or 6) are arranged at intervals along the inner edge of the heat dissipation groove 110. Compared with a single ridge structure, this greatly increases the contact area between the shell and the air. At the same time, the ridges form independent micro airflow channels, which can guide the air to form turbulent convection in the groove, enhance the heat conduction and dissipation efficiency, and more efficiently remove the heat transferred from the coil and permanent magnet to the shell, thereby reducing the temperature rise of the core components of the motor.

[0031] It should be noted that heat dissipation holes can be set on the heat dissipation ribs 120 to form a three-dimensional heat exchange structure of "outer surface of the ribs + inner wall of the heat dissipation holes", which significantly increases the contact area between the motor housing 10 and the air. At the same time, air can penetrate the heat dissipation holes to form internal and external convection, directly carrying away the heat accumulated inside the ribs. This solves the problem of fast heat dissipation on the surface and slow heat dissipation inside the traditional solid ribs, and enhances the heat conduction efficiency from the motor housing 10 to the outside.

[0032] It should be noted that the heat dissipation holes can serve as axial and radial communication channels for airflow: on the one hand, when the airflow flows axially along the heat dissipation groove 110, some of the airflow can pass through the heat dissipation holes and ribs, thereby increasing the turbulence of the airflow in the groove and preventing the formation of stagnant areas between the ribs; on the other hand, the heat dissipation holes can realize radial air exchange in the motor housing 10, accelerating the discharge of hot air and the replenishment of cold air, which is especially suitable for enclosed or poorly ventilated installation environments, further improving heat dissipation stability.

[0033] It should be noted that by setting heat dissipation holes, the amount of material used in the heat dissipation ribs 120 can be reduced, achieving a lighter housing without compromising heat dissipation performance. This avoids an increase in the overall inertia of the motor due to the addition of ribs, ensuring the high-speed response and high-frequency oscillation motion characteristics of the galvanometer motor, while reducing vibration and noise during motor operation. Furthermore, the spaced arrangement of the heat dissipation holes can disperse the thermal stress generated by temperature changes in the heat dissipation ribs 120, avoiding the risk of deformation or cracking of solid ribs due to thermal expansion and contraction. At the same time, the hole structure can buffer the mechanical vibration caused by the high-frequency oscillation of the motor, improve the fatigue resistance of the housing, and extend the service life of the galvanometer motor.

[0034] In some embodiments, the heat dissipation rib 120 extends from the inner edge of the heat dissipation groove 110 outward from the heat dissipation groove 110 and is located within the outer contour line of the motor housing 10.

[0035] It should be noted that the heat dissipation rib 120 extends outward from the inner edge of the heat dissipation groove 110 without exceeding the outer contour line of the motor housing 10, keeping the overall radial dimension of the motor housing 10 regular. The addition of the rib will not cause additional radial protrusions, allowing it to directly match the existing equipment's installation interface and assembly space without requiring adaptive modifications to the installation structure of downstream application equipment, thus improving the versatility and interchangeability of the galvanometer motor. Furthermore, the rib, recessed within the outer contour line of the housing, can be protected by the side wall of the heat dissipation groove 110, preventing deformation and damage to the rib due to bumps or scratches from external objects during motor transportation, installation, or operation. This ensures the structural integrity of the heat dissipation rib 120 and maintains long-term stable heat dissipation performance.

[0036] In some embodiments, the heat dissipation groove 110 is a circular groove or a rectangular groove.

[0037] It should be noted that the curved inner wall of the circular groove guides airflow smoothly along the axial direction, reducing airflow eddies and drag losses, and improving natural convection heat dissipation efficiency. This is suitable for precision optical applications with high requirements for airflow noise. The straight sidewalls and angular structure of the rectangular groove enhance the turbulence effect of airflow within the groove, ensuring full contact between air and the inner wall of the groove and the heat dissipation ribs 120, thus strengthening the forced convection heat dissipation effect. This is suitable for high-frequency, heavy-duty industrial laser processing applications with high heat generation. The two groove types can be flexibly selected according to actual application conditions, improving the adaptability of the motor structure.

[0038] It should be noted that the arc transition structure of the circular groove can disperse the stress of the housing, avoid stress concentration at sharp corners, improve the fatigue resistance of the motor housing 10 under high-frequency vibration conditions, and prevent the housing from cracking; the right-angle structure of the rectangular groove can increase the contact area between the groove and the heat dissipation rib 120, improve the connection strength between the rib and the housing, and prevent the rib from falling off due to vibration. At the same time, the sidewall of the rectangular groove has a stronger load-bearing capacity, which can better protect the internal rib from external impact.

[0039] In some embodiments, a rotor receiving cavity is provided on the end face of the motor housing 10, the rotor receiving cavity extends along the axial direction of the motor housing 10, and a coil receiving groove is also provided between the rotor receiving cavity and the inner wall of the motor housing 10, the coil receiving groove being used to place the housing coil winding 20.

[0040] It should be noted that, as Figure 4 As shown, the rotor housing cavity and coil housing slot are arranged in layers along the motor axis to form a coaxial nested structure of "rotor-coil-housing". This eliminates the need for additional brackets or mounting bases, significantly reducing the radial and axial dimensions of the motor. This meets the application requirements of miniaturization and lightweighting of galvanometer motors, while also facilitating integration and assembly with downstream equipment such as laser scanning systems.

[0041] It should be noted that by placing the coil receiving slot between the rotor receiving cavity and the inner wall of the motor housing 10, the housing coil winding 20 can be arranged close to the stator permanent magnet (or the housing magnetic conductive layer), which shortens the magnetic circuit length and reduces the magnetic resistance. At the same time, the coaxial nested layout ensures that the air gap between the housing coil winding 20 and the rotor is uniform, avoids magnetic field distortion, improves the conversion efficiency of electromagnetic torque, ensures the linear relationship between torque and input current, and enhances the motor control accuracy. The housing coil winding 20 is usually fixed by epoxy resin curing.

[0042] It should be noted that the coil receiving slot is close to the inner wall of the motor housing 10. The Joule heat generated when the coil is working can be directly conducted to the motor housing 10 through the slot wall, and then quickly dissipated to the outside through the heat dissipation groove 110 and ribs on the outer surface of the housing. Compared with the structure of the coil being suspended, this design shortens the heat transfer path, reduces thermal resistance, effectively reduces the coil temperature rise, and avoids the motor dynamic performance being affected by resistance changes.

[0043] In some embodiments, the center distance between the heat dissipation groove 110 and the center of the motor housing 10 is 0.3x(R1-R2)≤(R1-R3)≤0.5x(R1-R2). Wherein, R1 is the outer diameter of the motor housing 10, R2 is the inner diameter of the motor housing 10, and R3 is the center distance of the groove.

[0044] It should be noted that in the formula, (R1-R2) is the total radial wall thickness of the motor housing 10, and (R1-R3) represents the remaining wall thickness of the housing at the heat dissipation groove 110. Limiting this remaining wall thickness to the range of (30%-50%) of the total wall thickness avoids both insufficient mechanical strength of the housing due to excessively thin walls (unable to withstand assembly stress and high-frequency vibration) and excessively thick walls hindering heat conduction (making it difficult for heat generated by the coil to be quickly transferred to the outer surface of the housing). This achieves an optimal balance between "structural load-bearing capacity" and "heat conduction efficiency," adapting to the high-frequency oscillating working characteristics of the galvanometer motor. The relationship curve between the motor output torque T0 and (R1-R3) / (R1-R2) is shown below. Figure 7 As shown, by ensuring that 0.3x(R1-R2)≤(R1-R3)≤0.5x(R1-R2), a larger output torque of the motor can be guaranteed.

[0045] It should be noted that, combined with the symmetrical layout of "the center plane of the heat dissipation groove 110 perpendicularly bisects the coil winding", this size limit ensures that the groove position is in the non-core area of ​​the stator magnetic circuit, avoiding the disruption of the continuity of the stator magnetic layer due to excessive groove depth (remaining wall thickness < 30% of the total wall thickness), and preventing magnetic field distortion caused by sudden changes in magnetic reluctance; at the same time, it avoids the problem of insufficient heat dissipation area and poor temperature rise control effect caused by excessively shallow groove (remaining wall thickness > 50% of the total wall thickness), so as to maintain the uniformity of the permanent magnet magnetic field, ensure the strict linear relationship between torque and input current, and ensure the high-precision angular displacement control performance of the galvanometer motor; and this size range provides reasonable arrangement space for the ribs in the heat dissipation groove 110: when the remaining wall thickness ratio is (30%-50%), the depth and width ratio of the groove is optimal, which can accommodate multiple spaced heat dissipation ribs 120 to expand the heat exchange area, and ensure that the ribs and the side wall of the groove form an efficient airflow channel, guiding air to flow quickly over the surface of the ribs to carry away heat. If the remaining wall thickness exceeds this range, the groove space will be insufficient, and the heat dissipation effect of the ribs cannot be fully utilized.

[0046] Secondly, such as Figure 4 As shown, this application embodiment provides a galvanometer motor, including: Such as the galvanometer motor housing structure in any of the first aspects; The housing coil winding 20 is arranged in the galvanometer motor housing structure with the center plane of the heat dissipation groove 110 as the symmetrical plane. The magnet assembly 30 is rotatably mounted inside the motor housing 10; The encoder component 40 is located at one end of the motor housing 10 and is connected to the magnet assembly 30; The galvanometer lens 50 is connected to the end of the magnet assembly 30 that is furthest from the encoding assembly 40.

[0047] It should be noted that the motor adopts a coaxial nested structure of "casing-coil-magnet assembly 30-galvanometer lens 50". The layered design of the rotor receiving cavity and the coil receiving slot significantly reduces the radial and axial dimensions of the motor. At the same time, the encoder assembly 40 is directly connected to the magnet assembly 30, and the galvanometer lens 50 is coupled to the other end of the magnet assembly 30, forming an integrated structure of "drive-detection-execution". This reduces the backlash and inertia loss in the transmission links, improves the dynamic response speed of the motor, and is suitable for scenarios with strict requirements for rapid positioning, such as laser marking and optical scanning.

[0048] It should be noted that the heat dissipation structure design of the housing does not change the overall radial dimension of the motor, and can be directly matched with the installation interface of existing laser processing and optical scanning equipment without the need for adaptation modifications to downstream equipment; at the same time, the improved heat dissipation performance enables the motor to cover a variety of application scenarios from low-power precision scanning to high-power laser cutting, enhancing the market adaptability of the product.

[0049] In some embodiments, the magnet assembly 30 includes: The rotating shaft mechanism is located inside the rotor receiving cavity of the motor housing 10; The rotor magnet 330 is located in the rotating shaft mechanism and is within the coverage area of ​​the housing coil winding 20.

[0050] It should be noted that by placing the rotor magnet 330 in the rotating shaft mechanism and within the coverage area of ​​the housing coil winding 20, the magnetic field generated by the coil can be fully coupled with the rotor magnet 330, reducing magnetic field leakage and improving the conversion efficiency of electromagnetic torque. At the same time, the close arrangement of the rotor magnet 330 and the coil shortens the magnetic circuit length, reduces magnetic resistance, and further enhances the output torque, which is suitable for the power requirements of the galvanometer motor for high-precision small-angle deflection.

[0051] It should be noted that the rotating shaft mechanism provides a precise installation reference for the rotor magnet 330, which can ensure the coaxiality of the magnet with the motor housing 10 and the housing coil winding 20, and avoid uneven air gap caused by magnet eccentricity; combined with the symmetrical layout of the coil winding, it can maintain a uniform distribution of the air gap magnetic field, ensure the linear relationship between torque and input current, and improve the position control accuracy of the motor; wherein, the rotor rotating shaft 320 includes a front shaft section and a rear shaft section, and the rotor magnet 330 is located between the front shaft section and the rear shaft section.

[0052] It should be noted that by integrating the rotor magnet 330 into the shaft mechanism, a "magnet-shaft" integrated structure is formed, which reduces the connection gap between components and improves the rigidity of the rotor assembly. When the galvanometer motor oscillates at high frequency, it can prevent the magnet from loosening or shifting, prevent magnetic field distortion, and reduce rotor vibration and noise, ensuring long-term operational stability. Moreover, as the mounting carrier for the magnet, the shaft mechanism can pre-position and fix the magnet before embedding it into the rotor receiving cavity of the motor housing 10. This eliminates the need to adjust the position of the magnet separately in the small housing, simplifies the assembly process, improves production efficiency, and ensures the consistency of different batches of products.

[0053] In some embodiments, the rotating shaft mechanism includes: The rotor shaft 320 passes through the rotor receiving cavity of the motor housing 10 and is connected to the encoder assembly 40, and is provided with rotor magnet 330. The rotor bearing 310 is located between the rotor shaft 320 and the motor housing 10 to support the rotor shaft 320.

[0054] It should be noted that the rotor bearing 310 includes a head rotor bearing 310 located at the right end of the rotor shaft 320 and a tail rotor bearing 310 located at the left end of the rotor shaft 320. The head (right end) and tail (left end) dual bearings support the two ends of the rotor shaft 320 respectively, forming a rigid support structure with two-point positioning. This can strictly limit the radial runout and axial movement of the shaft, and control the coaxiality error of the shaft to a very small range. It avoids the "cantilever effect" when supported by a single bearing, ensures the uniformity of the air gap between the rotor magnet 330 and the housing coil winding 20, and prevents magnetic field distortion from affecting the accuracy of torque linear control. Moreover, the dual bearing layout can evenly distribute the loads such as the self-weight and oscillation inertia force of the rotor shaft 320 (and the magnet and galvanometer lens 50) to both ends of the motor housing 10, avoiding local stress concentration caused by a single bearing bearing all the loads. At the same time, the support at both ends can improve the bending stiffness of the shaft, prevent the shaft from elastically deforming during high-frequency oscillation, and adapt to the high-speed and high-response working characteristics of the galvanometer motor.

[0055] In some embodiments, the encoding component 40 includes: The encoder 410 is located at one end of the motor housing 10 and is connected to the rotor shaft 320, and is used to detect the rotation parameters of the rotor shaft 320. The encoder cover plate 420 is placed over the encoder 410 and is connected to the end face of the motor housing 10.

[0056] It should be noted that by directly connecting the encoder 410 to the rotor shaft 320, the rotational parameters such as angular displacement and speed of the rotor shaft 320 can be detected in real time without delay, avoiding detection errors in the transmission link. Combined with the electromagnetic drive characteristics of the galvanometer motor, it can provide high-precision position feedback for the system, realize linear control of torque and current, and ensure the beam deflection accuracy in scenarios such as laser scanning and marking.

[0057] It should be noted that by covering the encoder 410 with the encoder cover 420, external dust, moisture, oil and other contaminants can be effectively isolated, preventing them from entering the encoder 410 and affecting the performance of the detection elements (such as the code disk and photosensitive components). At the same time, the cover can buffer external mechanical impacts, preventing the encoder 410 from being damaged by collisions and vibrations, making it suitable for complex working environments such as industrial workshops. Furthermore, the encoder 410 can be pre-assembled with the rotor shaft 320, and then connected to the end face of the motor housing 10 through the encoder cover 420. This eliminates the need to adjust the position of the encoder 410 in the complex space inside the housing, simplifying the assembly process. During subsequent maintenance, the encoder cover 420 can be removed separately to inspect / replace the encoder 410 without disassembling the entire motor, reducing maintenance difficulty and time costs.

[0058] It should be noted that by integrating the encoder component 40 into one end of the motor housing 10, a compact axial layout is formed with the rotor shaft 320 and the magnet component 30, without occupying additional radial space of the motor; the fit design of the encoder cover plate 420 with the end face of the motor housing 10 further compresses the end size, adapting to the application requirements of miniaturization and integration of galvanometer motors.

[0059] It should be noted that the housing coil winding 20 inside the casing is fixed after curing with epoxy resin (glue). After the winding is energized, it forms a pair of N and S poles. The magnetic lines of force generated by the energized winding are fixed and symmetrically distributed 180 degrees. When a traditional galvanometer motor is unloaded and the shaft stops reciprocating, the magnetic lines of force of the magnetic field across the casing cross-section generated by the energized winding (i.e., the housing coil winding 20) are distributed as follows: Figure 2 As shown; by Figure 2 It can be clearly observed that, along the axis of symmetry of the two semi-closed magnetic field paths, there are two regions, A and B, on the radial outer circumference of the housing (i.e., the motor housing 10), through which the magnetic field lines almost do not flow. This results in the magnetic flux density in these regions (A and B) being much lower than in other regions. The magnetic flux density distribution diagram is shown below. Figure 3 As shown.

[0060] It should be noted that the magnetic field distribution diagram of the galvanometer motor provided in the embodiments of this application is as follows: Figure 5 As shown, the magnetic flux density distribution diagram is as follows: Figure 6As shown, the magnetic field distribution in areas with low magnetic flux density is basically the same as that of traditional galvanometer motors after adopting the galvanometer motor housing structure in this embodiment. The magnetic flux density in areas with low magnetic flux density changes to be the same as that in other areas after adopting the galvanometer motor housing structure in this embodiment, thus the material is effectively utilized.

[0061] Thirdly, embodiments of this application provide a laser marking machine, including a galvanometer motor as described in any embodiment of the second aspect, wherein the galvanometer motor includes: Such as the galvanometer motor housing structure in any of the first aspects; The housing coil winding 20 is arranged in the galvanometer motor housing structure with the center plane of the heat dissipation groove 110 as the symmetrical plane. The magnet assembly 30 is rotatably mounted inside the motor housing 10; The encoder component 40 is located at one end of the motor housing 10 and is connected to the magnet assembly 30; The galvanometer lens 50 is connected to the end of the magnet assembly 30 that is furthest from the encoding assembly 40.

[0062] It should be noted that the motor adopts a coaxial nested structure of "casing-coil-magnet assembly 30-galvanometer lens 50". The layered design of the rotor receiving cavity and the coil receiving slot significantly reduces the radial and axial dimensions of the motor. At the same time, the encoder assembly 40 is directly connected to the magnet assembly 30, and the galvanometer lens 50 is coupled to the other end of the magnet assembly 30, forming an integrated structure of "drive-detection-execution". This reduces the backlash and inertia loss in the transmission links, improves the dynamic response speed of the motor, and is suitable for scenarios with strict requirements for rapid positioning, such as laser marking and optical scanning.

[0063] It should be noted that the heat dissipation structure design of the housing does not change the overall radial dimension of the motor, and can be directly matched with the installation interface of existing laser processing and optical scanning equipment without the need for adaptation modifications to downstream equipment; at the same time, the improved heat dissipation performance enables the motor to cover a variety of application scenarios from low-power precision scanning to high-power laser cutting, enhancing the market adaptability of the product.

[0064] In some embodiments, the magnet assembly 30 includes: The rotating shaft mechanism is located inside the rotor receiving cavity of the motor housing 10; The rotor magnet 330 is located in the rotating shaft mechanism and is within the coverage area of ​​the housing coil winding 20.

[0065] It should be noted that by placing the rotor magnet 330 in the rotating shaft mechanism and within the coverage area of ​​the housing coil winding 20, the magnetic field generated by the coil can be fully coupled with the rotor magnet 330, reducing magnetic field leakage and improving the conversion efficiency of electromagnetic torque. At the same time, the close arrangement of the rotor magnet 330 and the coil shortens the magnetic circuit length, reduces magnetic resistance, and further enhances the output torque, which is suitable for the power requirements of the galvanometer motor for high-precision small-angle deflection.

[0066] It should be noted that the rotating shaft mechanism provides a precise installation reference for the rotor magnet 330, which can ensure the coaxiality of the magnet with the motor housing 10 and the housing coil winding 20, and avoid uneven air gap caused by magnet eccentricity; combined with the symmetrical layout of the coil winding, it can maintain a uniform distribution of the air gap magnetic field, ensure the linear relationship between torque and input current, and improve the position control accuracy of the motor; wherein, the rotor rotating shaft 320 includes a front shaft section and a rear shaft section, and the rotor magnet 330 is located between the front shaft section and the rear shaft section.

[0067] It should be noted that by integrating the rotor magnet 330 into the shaft mechanism, a "magnet-shaft" integrated structure is formed, which reduces the connection gap between components and improves the rigidity of the rotor assembly. When the galvanometer motor oscillates at high frequency, it can prevent the magnet from loosening or shifting, prevent magnetic field distortion, and reduce rotor vibration and noise, ensuring long-term operational stability. Moreover, as the mounting carrier for the magnet, the shaft mechanism can pre-position and fix the magnet before embedding it into the rotor receiving cavity of the motor housing 10. This eliminates the need to adjust the position of the magnet separately in the small housing, simplifies the assembly process, improves production efficiency, and ensures the consistency of different batches of products.

[0068] In some embodiments, the rotating shaft mechanism includes: The rotor shaft 320 passes through the rotor receiving cavity of the motor housing 10 and is connected to the encoder assembly 40, and is provided with rotor magnet 330. The rotor bearing 310 is located between the rotor shaft 320 and the motor housing 10 to support the rotor shaft 320.

[0069] It should be noted that the rotor bearing 310 includes a head rotor bearing 310 located at the right end of the rotor shaft 320 and a tail rotor bearing 310 located at the left end of the rotor shaft 320. The head (right end) and tail (left end) dual bearings support the two ends of the rotor shaft 320 respectively, forming a rigid support structure with two-point positioning. This can strictly limit the radial runout and axial movement of the shaft, and control the coaxiality error of the shaft to a very small range. It avoids the "cantilever effect" when supported by a single bearing, ensures the uniformity of the air gap between the rotor magnet 330 and the housing coil winding 20, and prevents magnetic field distortion from affecting the accuracy of torque linear control. Moreover, the dual bearing layout can evenly distribute the loads such as the self-weight and oscillation inertia force of the rotor shaft 320 (and the magnet and galvanometer lens 50) to both ends of the motor housing 10, avoiding local stress concentration caused by a single bearing bearing all the loads. At the same time, the support at both ends can improve the bending stiffness of the shaft, prevent the shaft from elastically deforming during high-frequency oscillation, and adapt to the high-speed and high-response working characteristics of the galvanometer motor.

[0070] In some embodiments, the encoding component 40 includes: The encoder 410 is located at one end of the motor housing 10 and is connected to the rotor shaft 320, and is used to detect the rotation parameters of the rotor shaft 320. The encoder cover plate 420 is placed over the encoder 410 and is connected to the end face of the motor housing 10.

[0071] It should be noted that by directly connecting the encoder 410 to the rotor shaft 320, the rotational parameters such as angular displacement and speed of the rotor shaft 320 can be detected in real time without delay, avoiding detection errors in the transmission link. Combined with the electromagnetic drive characteristics of the galvanometer motor, it can provide high-precision position feedback for the system, realize linear control of torque and current, and ensure the beam deflection accuracy in scenarios such as laser scanning and marking.

[0072] It should be noted that by covering the encoder 410 with the encoder cover 420, external dust, moisture, oil and other contaminants can be effectively isolated, preventing them from entering the encoder 410 and affecting the performance of the detection elements (such as the code disk and photosensitive components). At the same time, the cover can buffer external mechanical impacts, preventing the encoder 410 from being damaged by collisions and vibrations, making it suitable for complex working environments such as industrial workshops. Furthermore, the encoder 410 can be pre-assembled with the rotor shaft 320, and then connected to the end face of the motor housing 10 through the encoder cover 420. This eliminates the need to adjust the position of the encoder 410 in the complex space inside the housing, simplifying the assembly process. During subsequent maintenance, the encoder cover 420 can be removed separately to inspect / replace the encoder 410 without disassembling the entire motor, reducing maintenance difficulty and time costs.

[0073] It should be noted that by integrating the encoder component 40 into one end of the motor housing 10, a compact axial layout is formed with the rotor shaft 320 and the magnet component 30, without occupying additional radial space of the motor; the fit design of the encoder cover plate 420 with the end face of the motor housing 10 further compresses the end size, adapting to the application requirements of miniaturization and integration of galvanometer motors.

[0074] It should be noted that the housing coil winding 20 inside the casing is fixed after curing with epoxy resin (glue). After the winding is energized, it forms a pair of N and S poles. The magnetic lines of force generated by the energized winding are fixed and symmetrically distributed 180 degrees. When a traditional galvanometer motor is unloaded and the shaft stops reciprocating, the magnetic lines of force of the magnetic field across the casing cross-section generated by the energized winding (i.e., the housing coil winding 20) are distributed as follows: Figure 2 As shown; by Figure 2 It can be clearly observed that, along the axis of symmetry of the two semi-closed magnetic field paths, there are two regions, A and B, on the radial outer circumference of the housing (i.e., the motor housing 10), through which the magnetic field lines almost do not flow. This results in the magnetic flux density in these regions (A and B) being much lower than in other regions. The magnetic flux density distribution diagram is shown below. Figure 3 As shown.

[0075] It should be noted that the magnetic field distribution diagram of the galvanometer motor provided in the embodiments of this application is as follows: Figure 5 As shown, the magnetic flux density distribution diagram is as follows: Figure 6 As shown, the magnetic field distribution in areas with low magnetic flux density is basically the same as that of traditional galvanometer motors after adopting the galvanometer motor housing structure in this embodiment. The magnetic flux density in areas with low magnetic flux density changes to be the same as that in other areas after adopting the galvanometer motor housing structure in this embodiment, thus the material is effectively utilized.

[0076] Fourthly, embodiments of this application provide a laser scanning diameter measuring instrument, including a galvanometer motor as described in any embodiment of the second aspect, wherein the galvanometer motor includes: Such as the galvanometer motor housing structure in any of the first aspects; The housing coil winding 20 is arranged in the galvanometer motor housing structure with the center plane of the heat dissipation groove 110 as the symmetrical plane. The magnet assembly 30 is rotatably mounted inside the motor housing 10; The encoder component 40 is located at one end of the motor housing 10 and is connected to the magnet assembly 30; The galvanometer lens 50 is connected to the end of the magnet assembly 30 that is furthest from the encoding assembly 40.

[0077] It should be noted that the motor adopts a coaxial nested structure of "casing-coil-magnet assembly 30-galvanometer lens 50". The layered design of the rotor receiving cavity and the coil receiving slot significantly reduces the radial and axial dimensions of the motor. At the same time, the encoder assembly 40 is directly connected to the magnet assembly 30, and the galvanometer lens 50 is coupled to the other end of the magnet assembly 30, forming an integrated structure of "drive-detection-execution". This reduces the backlash and inertia loss in the transmission links, improves the dynamic response speed of the motor, and is suitable for scenarios with strict requirements for rapid positioning, such as laser marking and optical scanning.

[0078] It should be noted that the heat dissipation structure design of the housing does not change the overall radial dimension of the motor, and can be directly matched with the installation interface of existing laser processing and optical scanning equipment without the need for adaptation modifications to downstream equipment; at the same time, the improved heat dissipation performance enables the motor to cover a variety of application scenarios from low-power precision scanning to high-power laser cutting, enhancing the market adaptability of the product.

[0079] In some embodiments, the magnet assembly 30 includes: The rotating shaft mechanism is located inside the rotor receiving cavity of the motor housing 10; The rotor magnet 330 is located in the rotating shaft mechanism and is within the coverage area of ​​the housing coil winding 20.

[0080] It should be noted that by placing the rotor magnet 330 in the rotating shaft mechanism and within the coverage area of ​​the housing coil winding 20, the magnetic field generated by the coil can be fully coupled with the rotor magnet 330, reducing magnetic field leakage and improving the conversion efficiency of electromagnetic torque. At the same time, the close arrangement of the rotor magnet 330 and the coil shortens the magnetic circuit length, reduces magnetic resistance, and further enhances the output torque, which is suitable for the power requirements of the galvanometer motor for high-precision small-angle deflection.

[0081] It should be noted that the rotating shaft mechanism provides a precise installation reference for the rotor magnet 330, which can ensure the coaxiality of the magnet with the motor housing 10 and the housing coil winding 20, and avoid uneven air gap caused by magnet eccentricity; combined with the symmetrical layout of the coil winding, it can maintain a uniform distribution of the air gap magnetic field, ensure the linear relationship between torque and input current, and improve the position control accuracy of the motor; wherein, the rotor rotating shaft 320 includes a front shaft section and a rear shaft section, and the rotor magnet 330 is located between the front shaft section and the rear shaft section.

[0082] It should be noted that by integrating the rotor magnet 330 into the shaft mechanism, a "magnet-shaft" integrated structure is formed, which reduces the connection gap between components and improves the rigidity of the rotor assembly. When the galvanometer motor oscillates at high frequency, it can prevent the magnet from loosening or shifting, prevent magnetic field distortion, and reduce rotor vibration and noise, ensuring long-term operational stability. Moreover, as the mounting carrier for the magnet, the shaft mechanism can pre-position and fix the magnet before embedding it into the rotor receiving cavity of the motor housing 10. This eliminates the need to adjust the position of the magnet separately in the small housing, simplifies the assembly process, improves production efficiency, and ensures the consistency of different batches of products.

[0083] In some embodiments, the rotating shaft mechanism includes: The rotor shaft 320 passes through the rotor receiving cavity of the motor housing 10 and is connected to the encoder assembly 40, and is provided with rotor magnet 330. The rotor bearing 310 is located between the rotor shaft 320 and the motor housing 10 to support the rotor shaft 320.

[0084] It should be noted that the rotor bearing 310 includes a head rotor bearing 310 located at the right end of the rotor shaft 320 and a tail rotor bearing 310 located at the left end of the rotor shaft 320. The head (right end) and tail (left end) dual bearings support the two ends of the rotor shaft 320 respectively, forming a rigid support structure with two-point positioning. This can strictly limit the radial runout and axial movement of the shaft, and control the coaxiality error of the shaft to a very small range. It avoids the "cantilever effect" when supported by a single bearing, ensures the uniformity of the air gap between the rotor magnet 330 and the housing coil winding 20, and prevents magnetic field distortion from affecting the accuracy of torque linear control. Moreover, the dual bearing layout can evenly distribute the loads such as the self-weight and oscillation inertia force of the rotor shaft 320 (and the magnet and galvanometer lens 50) to both ends of the motor housing 10, avoiding local stress concentration caused by a single bearing bearing all the loads. At the same time, the support at both ends can improve the bending stiffness of the shaft, prevent the shaft from elastically deforming during high-frequency oscillation, and adapt to the high-speed and high-response working characteristics of the galvanometer motor.

[0085] In some embodiments, the encoding component 40 includes: The encoder 410 is located at one end of the motor housing 10 and is connected to the rotor shaft 320, and is used to detect the rotation parameters of the rotor shaft 320. The encoder cover plate 420 is placed over the encoder 410 and is connected to the end face of the motor housing 10.

[0086] It should be noted that by directly connecting the encoder 410 to the rotor shaft 320, the rotational parameters such as angular displacement and speed of the rotor shaft 320 can be detected in real time without delay, avoiding detection errors in the transmission link. Combined with the electromagnetic drive characteristics of the galvanometer motor, it can provide high-precision position feedback for the system, realize linear control of torque and current, and ensure the beam deflection accuracy in scenarios such as laser scanning and marking.

[0087] It should be noted that by covering the encoder 410 with the encoder cover 420, external dust, moisture, oil and other contaminants can be effectively isolated, preventing them from entering the encoder 410 and affecting the performance of the detection elements (such as the code disk and photosensitive components). At the same time, the cover can buffer external mechanical impacts, preventing the encoder 410 from being damaged by collisions and vibrations, making it suitable for complex working environments such as industrial workshops. Furthermore, the encoder 410 can be pre-assembled with the rotor shaft 320, and then connected to the end face of the motor housing 10 through the encoder cover 420. This eliminates the need to adjust the position of the encoder 410 in the complex space inside the housing, simplifying the assembly process. During subsequent maintenance, the encoder cover 420 can be removed separately to inspect / replace the encoder 410 without disassembling the entire motor, reducing maintenance difficulty and time costs.

[0088] It should be noted that by integrating the encoder component 40 into one end of the motor housing 10, a compact axial layout is formed with the rotor shaft 320 and the magnet component 30, without occupying additional radial space of the motor; the fit design of the encoder cover plate 420 with the end face of the motor housing 10 further compresses the end size, adapting to the application requirements of miniaturization and integration of galvanometer motors.

[0089] It should be noted that the housing coil winding 20 inside the casing is fixed after curing with epoxy resin (glue). After the winding is energized, it forms a pair of N and S poles. The magnetic lines of force generated by the energized winding are fixed and symmetrically distributed 180 degrees. When a traditional galvanometer motor is unloaded and the shaft stops reciprocating, the magnetic lines of force of the magnetic field across the casing cross-section generated by the energized winding (i.e., the housing coil winding 20) are distributed as follows: Figure 2 As shown; by Figure 2 It can be clearly observed that, along the axis of symmetry of the two semi-closed magnetic field paths, there are two regions, A and B, on the radial outer circumference of the housing (i.e., the motor housing 10), through which the magnetic field lines almost do not flow. This results in the magnetic flux density in these regions (A and B) being much lower than in other regions. The magnetic flux density distribution diagram is shown below. Figure 3 As shown.

[0090] It should be noted that the magnetic field distribution diagram of the galvanometer motor provided in the embodiments of this application is as follows: Figure 5 As shown, the magnetic flux density distribution diagram is as follows: Figure 6As shown, the magnetic field distribution in areas with low magnetic flux density is basically the same as that of traditional galvanometer motors after adopting the galvanometer motor housing structure in this embodiment. The magnetic flux density in areas with low magnetic flux density changes to be the same as that in other areas after adopting the galvanometer motor housing structure in this embodiment, thus the material is effectively utilized.

[0091] Fifthly, embodiments of this application provide a laser engraving machine, including a galvanometer motor as described in any embodiment of the second aspect, the galvanometer motor comprising: Such as the galvanometer motor housing structure in any of the first aspects; The housing coil winding 20 is arranged in the galvanometer motor housing structure with the center plane of the heat dissipation groove 110 as the symmetrical plane. The magnet assembly 30 is rotatably mounted inside the motor housing 10; The encoder component 40 is located at one end of the motor housing 10 and is connected to the magnet assembly 30; The galvanometer lens 50 is connected to the end of the magnet assembly 30 that is furthest from the encoding assembly 40.

[0092] It should be noted that the motor adopts a coaxial nested structure of "casing-coil-magnet assembly 30-galvanometer lens 50". The layered design of the rotor receiving cavity and the coil receiving slot significantly reduces the radial and axial dimensions of the motor. At the same time, the encoder assembly 40 is directly connected to the magnet assembly 30, and the galvanometer lens 50 is coupled to the other end of the magnet assembly 30, forming an integrated structure of "drive-detection-execution". This reduces the backlash and inertia loss in the transmission links, improves the dynamic response speed of the motor, and is suitable for scenarios with strict requirements for rapid positioning, such as laser marking and optical scanning.

[0093] It should be noted that the heat dissipation structure design of the housing does not change the overall radial dimension of the motor, and can be directly matched with the installation interface of existing laser processing and optical scanning equipment without the need for adaptation modifications to downstream equipment; at the same time, the improved heat dissipation performance enables the motor to cover a variety of application scenarios from low-power precision scanning to high-power laser cutting, enhancing the market adaptability of the product.

[0094] In some embodiments, the magnet assembly 30 includes: The rotating shaft mechanism is located inside the rotor receiving cavity of the motor housing 10; The rotor magnet 330 is located in the rotating shaft mechanism and is within the coverage area of ​​the housing coil winding 20.

[0095] It should be noted that by placing the rotor magnet 330 in the rotating shaft mechanism and within the coverage area of ​​the housing coil winding 20, the magnetic field generated by the coil can be fully coupled with the rotor magnet 330, reducing magnetic field leakage and improving the conversion efficiency of electromagnetic torque. At the same time, the close arrangement of the rotor magnet 330 and the coil shortens the magnetic circuit length, reduces magnetic resistance, and further enhances the output torque, which is suitable for the power requirements of the galvanometer motor for high-precision small-angle deflection.

[0096] It should be noted that the rotating shaft mechanism provides a precise installation reference for the rotor magnet 330, which can ensure the coaxiality of the magnet with the motor housing 10 and the housing coil winding 20, and avoid uneven air gap caused by magnet eccentricity; combined with the symmetrical layout of the coil winding, it can maintain a uniform distribution of the air gap magnetic field, ensure the linear relationship between torque and input current, and improve the position control accuracy of the motor; wherein, the rotor rotating shaft 320 includes a front shaft section and a rear shaft section, and the rotor magnet 330 is located between the front shaft section and the rear shaft section.

[0097] It should be noted that by integrating the rotor magnet 330 into the shaft mechanism, a "magnet-shaft" integrated structure is formed, which reduces the connection gap between components and improves the rigidity of the rotor assembly. When the galvanometer motor oscillates at high frequency, it can prevent the magnet from loosening or shifting, prevent magnetic field distortion, and reduce rotor vibration and noise, ensuring long-term operational stability. Moreover, as the mounting carrier for the magnet, the shaft mechanism can pre-position and fix the magnet before embedding it into the rotor receiving cavity of the motor housing 10. This eliminates the need to adjust the position of the magnet separately in the small housing, simplifies the assembly process, improves production efficiency, and ensures the consistency of different batches of products.

[0098] In some embodiments, the rotating shaft mechanism includes: The rotor shaft 320 passes through the rotor receiving cavity of the motor housing 10 and is connected to the encoder assembly 40, and is provided with rotor magnet 330. The rotor bearing 310 is located between the rotor shaft 320 and the motor housing 10 to support the rotor shaft 320.

[0099] It should be noted that the rotor bearing 310 includes a head rotor bearing 310 located at the right end of the rotor shaft 320 and a tail rotor bearing 310 located at the left end of the rotor shaft 320. The head (right end) and tail (left end) dual bearings support the two ends of the rotor shaft 320 respectively, forming a rigid support structure with two-point positioning. This can strictly limit the radial runout and axial movement of the shaft, and control the coaxiality error of the shaft to a very small range. It avoids the "cantilever effect" when supported by a single bearing, ensures the uniformity of the air gap between the rotor magnet 330 and the housing coil winding 20, and prevents magnetic field distortion from affecting the accuracy of torque linear control. Moreover, the dual bearing layout can evenly distribute the loads such as the self-weight and oscillation inertia force of the rotor shaft 320 (and the magnet and galvanometer lens 50) to both ends of the motor housing 10, avoiding local stress concentration caused by a single bearing bearing all the loads. At the same time, the support at both ends can improve the bending stiffness of the shaft, prevent the shaft from elastically deforming during high-frequency oscillation, and adapt to the high-speed and high-response working characteristics of the galvanometer motor.

[0100] In some embodiments, the encoding component 40 includes: The encoder 410 is located at one end of the motor housing 10 and is connected to the rotor shaft 320, and is used to detect the rotation parameters of the rotor shaft 320. The encoder cover plate 420 is placed over the encoder 410 and is connected to the end face of the motor housing 10.

[0101] It should be noted that by directly connecting the encoder 410 to the rotor shaft 320, the rotational parameters such as angular displacement and speed of the rotor shaft 320 can be detected in real time without delay, avoiding detection errors in the transmission link. Combined with the electromagnetic drive characteristics of the galvanometer motor, it can provide high-precision position feedback for the system, realize linear control of torque and current, and ensure the beam deflection accuracy in scenarios such as laser scanning and marking.

[0102] It should be noted that by covering the encoder 410 with the encoder cover 420, external dust, moisture, oil and other contaminants can be effectively isolated, preventing them from entering the encoder 410 and affecting the performance of the detection elements (such as the code disk and photosensitive components). At the same time, the cover can buffer external mechanical impacts, preventing the encoder 410 from being damaged by collisions and vibrations, making it suitable for complex working environments such as industrial workshops. Furthermore, the encoder 410 can be pre-assembled with the rotor shaft 320, and then connected to the end face of the motor housing 10 through the encoder cover 420. This eliminates the need to adjust the position of the encoder 410 in the complex space inside the housing, simplifying the assembly process. During subsequent maintenance, the encoder cover 420 can be removed separately to inspect / replace the encoder 410 without disassembling the entire motor, reducing maintenance difficulty and time costs.

[0103] It should be noted that by integrating the encoder component 40 into one end of the motor housing 10, a compact axial layout is formed with the rotor shaft 320 and the magnet component 30, without occupying additional radial space of the motor; the fit design of the encoder cover plate 420 with the end face of the motor housing 10 further compresses the end size, adapting to the application requirements of miniaturization and integration of galvanometer motors.

[0104] It should be noted that the housing coil winding 20 inside the casing is fixed after curing with epoxy resin (glue). After the winding is energized, it forms a pair of N and S poles. The magnetic lines of force generated by the energized winding are fixed and symmetrically distributed 180 degrees. When a traditional galvanometer motor is unloaded and the shaft stops reciprocating, the magnetic lines of force of the magnetic field across the casing cross-section generated by the energized winding (i.e., the housing coil winding 20) are distributed as follows: Figure 2 As shown; by Figure 2 It can be clearly observed that, along the axis of symmetry of the two semi-closed magnetic field paths, there are two regions, A and B, on the radial outer circumference of the housing (i.e., the motor housing 10), through which the magnetic field lines almost do not flow. This results in the magnetic flux density in these regions (A and B) being much lower than in other regions. The magnetic flux density distribution diagram is shown below. Figure 3 As shown.

[0105] It should be noted that the magnetic field distribution diagram of the galvanometer motor provided in the embodiments of this application is as follows: Figure 5 As shown, the magnetic flux density distribution diagram is as follows: Figure 6 As shown, the magnetic field distribution in areas with low magnetic flux density is basically the same as that of traditional galvanometer motors after adopting the galvanometer motor housing structure in this embodiment. The magnetic flux density in areas with low magnetic flux density changes to be the same as that in other areas after adopting the galvanometer motor housing structure in this embodiment, thus the material is effectively utilized.

[0106] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0107] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0108] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A galvanometer motor housing structure, characterized in that, include: Motor housing, wherein the motor housing is cylindrical; Two heat dissipation grooves are symmetrically provided on the outer surface of the motor housing and extend along the axial direction of the motor housing; At least one heat dissipation rib is disposed within the heat dissipation groove; In the installed state, the center plane of the heat dissipation groove is perpendicular to and bisects the housing coil winding, so as to reduce the influence of the heat dissipation groove on the magnetic force of the motor housing and dissipate heat through the heat dissipation groove.

2. The galvanometer motor housing structure according to claim 1, characterized in that, The at least one heat dissipation rib is a plurality of heat dissipation ribs, and the plurality of heat dissipation ribs are arranged at intervals along the inner edge of the heat dissipation groove.

3. The galvanometer motor housing structure according to claim 1, characterized in that, The heat dissipation rib extends from the inner edge of the heat dissipation groove outward from the heat dissipation groove and is located within the outer contour line of the motor housing.

4. The galvanometer motor housing structure according to claim 1, characterized in that, The heat dissipation groove is a circular groove or a rectangular groove.

5. The galvanometer motor housing structure according to claim 1, characterized in that, The motor housing has a rotor receiving cavity on its end face, which extends along the axial direction of the motor housing. A coil receiving groove is also provided between the rotor receiving cavity and the inner wall of the motor housing for placing the housing coil winding.

6. The galvanometer motor housing structure according to any one of claims 1-5, characterized in that, The center-to-center distance between the heat dissipation groove and the center of the motor housing satisfies 0.3x(R1-R2)≤(R1-R3)≤0.5x(R1-R2). Where R1 is the outer diameter of the motor housing, R2 is the inner diameter of the motor housing, and R3 is the center distance of the groove.

7. A galvanometer motor, characterized in that, include: The galvanometer motor housing structure as described in any one of claims 1-6; The housing coil winding is arranged within the galvanometer motor housing structure with the center plane of the heat dissipation groove as the symmetrical plane; The magnet assembly is rotatably mounted inside the motor housing; An encoding component is located at one end of the motor housing and is connected to the magnet assembly; The galvanometer lens is connected to the end of the magnet assembly that is furthest from the encoding assembly.

8. The galvanometer motor according to claim 7, characterized in that, The magnet assembly includes: The rotating shaft mechanism is located within the rotor receiving cavity of the motor housing; The rotor magnet is disposed in the rotating shaft mechanism and is located within the coverage area of ​​the housing coil winding.

9. The galvanometer motor according to claim 8, characterized in that, The rotating shaft mechanism includes: The rotor shaft passes through the rotor receiving cavity of the motor housing and is connected to the encoding assembly, and the rotor magnet is provided on it; A rotor bearing is disposed between the rotor shaft and the motor housing to support the rotor shaft.

10. The galvanometer motor according to claim 9, characterized in that, The encoding component includes: An encoder is located at one end of the motor housing and connected to the rotor shaft, and is used to detect the rotation parameters of the rotor shaft; An encoder cover is placed over the encoder and connected to the end face of the motor housing.

Images