Galvanometer motor with limiting mechanism

Abstract

The utility model relates to a galvanometer motor with a limiting mechanism, and the galvanometer motor comprises a drive-by-wire unit, a housing unit and a lens unit which are sequentially connected, the housing unit comprises a housing, a stator assembly and a rotor assembly, the stator assembly and the rotor assembly are arranged in the housing, and the rotor assembly comprises a rotating shaft and a limiting transverse shaft which is radially arranged on the rotating shaft in a penetrating manner; the first end of the shell is connected with the bearing seat, and the second end of the shell is connected with the limiting gasket. Wherein the two ends of the rotating shaft are rotatably fixed in the shell through the first bearing and the second bearing respectively, the first bearing is arranged in the bearing seat, the second bearing is arranged in the shell and is close to the second end of the shell, and the limiting gasket blocks and limits the axial position of the second bearing; the limiting transverse shaft penetrates through the second end of the shell and is rotationally contained in the limiting groove to form a limiting mechanism. According to the galvanometer motor, through the independently arranged limiting mechanism, the position of the galvanometer can be effectively limited, the structure is simple, installation is convenient, and the assembly difficulty of the galvanometer motor is greatly reduced.

Description

Technical Field

[0001] The present application relates to the field of galvanometer scanning, and in particular to a galvanometer motor with a limiting mechanism. Background Art

[0002] Galvanometer motors are a special type of motor that utilizes vibration to achieve motion. They are widely used in a variety of fields, such as optics, communications, healthcare, radar, and laser processing, enabling fast and accurate motion control. In general, galvanometer motors have important applications in a variety of fields requiring optical signal conditioning, laser beam steering, optical imaging, and optical signal processing.

[0003] In LiDAR, galvanometer motors are widely used in scanning systems to scan the direction and position of the laser beam. By controlling the vibration of the galvanometer, the galvanometer motor achieves fast and accurate scanning of the laser beam, thereby realizing three-dimensional perception and measurement of the surrounding environment. Since the vibration of the galvanometer needs to limit its range of motion, a limiting structure is required in the current galvanometer motor to limit the range of motion of the galvanometer. However, the limiting structure in the current galvanometer motor is complex, making it difficult to limit the position of the galvanometer, affecting the dynamic response of the galvanometer motor and increasing the difficulty of assembling the galvanometer motor. Utility Model Content

[0004] In response to the technical problems existing in the prior art, this application proposes a galvanometer motor with a limiting mechanism. Through an independently set limiting mechanism, and the limiting mechanism is set close to the galvanometer unit, the position of the galvanometer can be effectively limited, thereby improving the dynamic response of the galvanometer motor. Moreover, the limiting mechanism of this application has a simple structure and is easy to install, which greatly reduces the difficulty of assembling the galvanometer motor.

[0005] The galvanometer motor with a limiting mechanism includes: a wire control unit, a shell unit and a lens unit connected in sequence, the shell unit includes a shell, a stator assembly and a rotor assembly are provided inside the shell, the rotor assembly includes a rotating shaft and a limiting horizontal shaft radially passing through the rotating shaft; the first end of the shell is connected to the bearing seat, and the second end of the shell is connected to the limiting washer; wherein, the two ends of the rotating shaft are rotatably fixed in the shell by a first bearing and a second bearing respectively, the first bearing is arranged in the bearing seat, the second bearing is arranged in the shell and close to the second end of the shell, the limiting washer blocks and limits the axial position of the second bearing; the limiting washer is provided with a limiting groove, and the limiting horizontal shaft passes through the second end of the shell and can be rotatably accommodated in the limiting groove to form a limiting mechanism.

[0006] As described above, in the galvanometer motor with a limiting mechanism, the limiting horizontal axis includes a cylindrical body with a first through hole, the cylindrical body includes an opening, and the opening passes through at least a portion of the side wall of the cylindrical body and is connected to the first through hole.

[0007] As described above, the galvanometer motor with a limiting mechanism comprises a second through hole and one or more first connecting holes on the limiting washer, wherein the second through hole is located in the middle of the limiting washer and is used to accommodate the passage of the rotating shaft; the limiting groove comprises a first groove and a second groove arranged opposite to each other in the upper and lower parts, wherein the first groove and the second groove extend from the second through hole to the outside of the limiting washer and are used to accommodate the limiting horizontal axis; the connecting hole is used to fix the limiting washer to the outer shell.

[0008] The galvanometer motor with a limiting mechanism as described above further includes: a connecting member connecting the limiting washer and the housing.

[0009] The galvanometer motor with a limiting mechanism as described above further includes: a connecting ring, which is arranged on a side of the limiting washer away from the housing, and the connecting ring at least partially covers the first groove and the second groove.

[0010] As described above, in the galvanometer motor with a limiting mechanism, the connecting ring includes one or more second connecting holes, which are connected to the connecting member and clamp the limiting washer between the housings.

[0011] In the galvanometer motor with a limiting mechanism as described above, the stator assembly includes a coil and a stator, wherein the coil is nested in the stator.

[0012] In the galvanometer motor with a limiting mechanism as described above, the stator is a magnetic ring, and the stator is bonded to the coil.

[0013] As described above, the galvanometer motor with a limiting mechanism, the wire control unit includes: an FPCB board, a back cover, a light-emitting light board and a receiving light board, the receiving light board is arranged on the FPCB board, the light-emitting light board is arranged on the back cover, the back cover is buckled on the FPCB board, and the light-emitting light board and the receiving light board are connected using a flexible cable.

[0014] In the galvanometer motor with a limiting mechanism as described above, the rear cover is made of metal.

[0015] The galvanometer motor with a limiting mechanism in the present application can effectively limit the position of the galvanometer through a limiting mechanism independently set close to the galvanometer unit, thereby improving the dynamic response of the galvanometer motor and greatly reducing the difficulty of assembling the galvanometer motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Below, the preferred embodiments of the present application will be further described in detail with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of a galvanometer motor according to one embodiment of the present application;

[0018] Figure 2 is a cross-sectional view of a galvanometer motor according to one embodiment of the present application;

[0019] Figure 3 An exploded diagram of a galvanometer motor according to one embodiment of the present application;

[0020] Figure 4 An exploded view of a housing unit according to one embodiment of the present application;

[0021] Figure 5 is a schematic structural diagram of a wire control unit according to an embodiment of the present application; and

[0022] Figure 6 is a schematic diagram of a stator assembly according to one embodiment of the present application;

[0023] Figure 7 Schematic diagram of a horizontal axis of position limitation according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] In the detailed description that follows, reference may be made to the various drawings that form part of this application and illustrate specific embodiments of the present application. In the drawings, similar reference numerals describe substantially similar components in different figures. Each specific embodiment of the present application is described below in sufficient detail to enable a person of ordinary skill in the art to implement the technical solutions of the present application. It should be understood that other embodiments may be utilized or that structural, logical, or electrical changes may be made to the embodiments of the present application.

[0026] In the description of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. Furthermore, the terms "first," "second," and the like, if used, are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] This application proposes a new type of galvanometer motor. By independently setting a limiting mechanism and setting the limiting mechanism close to the galvanometer unit, the position of the galvanometer can be effectively limited, thereby improving the dynamic response of the galvanometer motor. Moreover, the limiting mechanism of this application has a simple structure and is easy to install, which greatly reduces the difficulty of assembling the galvanometer motor.

[0028] The technical solution of this application is further described below through specific implementation methods. Those skilled in the art should understand that the following description is only for the purpose of facilitating the understanding of the technical solution of this application and should not be used to limit the scope of protection of this application.

[0029] Figure 1 Schematic diagram of the overall structure of a galvanometer motor according to one embodiment of the present application. Figure 2 sectional view of a galvanometer motor according to one embodiment of the present application. Figure 3 1 is an exploded diagram of a galvanometer motor according to one embodiment of the present application.

[0030] like Figures 1 to 3 As shown, the galvanometer motor 100 includes: a wire control unit 110, a shell unit 120 and a lens unit 130 connected in sequence, wherein the wire control unit 110 can be used to control the rotation of the galvanometer motor, and a rotor assembly and a stator assembly are arranged inside the shell unit 120, and the rotor assembly is controlled by the wire control unit 110 to rotate in the stator assembly, and the lens unit 130 is connected to the rotor assembly and is used to manipulate the light beam of the laser radar transmitting end.

[0031] Figure 4 FIG. 1 is an exploded view of a housing unit according to an embodiment of the present application. Figure 4 Combined with Figure 1 、 Figure 2As shown, in some embodiments, the galvanometer motor 100 may further include a limiting device that can limit the rotation angle of the rotor assembly, thereby limiting the position of the galvanometer unit connected to the rotor assembly. According to one embodiment of the present application, the limiting device is provided on the housing unit and close to the lens unit, thereby reducing the inertial effect of the lens unit, improving the response speed, and accurately controlling the position of the lens unit. It can also simplify the structure, making the overall structure of the galvanometer motor more compact, reducing mechanical failure points, and increasing the overall stability of the galvanometer motor.

[0032] The various structures of the galvanometer motor will be introduced in detail below. This application does not improve the galvanometer unit, which can be any existing structure and will not be described in detail here.

[0033] Figure 5 FIG. 1 is a schematic diagram of the structure of a wire control unit according to an embodiment of the present application. Figure 5 Combined with Figure 2 、 Figure 3 As shown, in some embodiments, the wire control unit 110 may include an FPCB (Flexible Printed Circuit Board) 111, a back cover 112, a light emitting board 113, and a receiving light board 114. The receiving light board 114 is arranged on the FPCB 111, the light emitting board 113 is arranged on the back cover 112, and the back cover 112 is buckled on the FPCB 111. In some embodiments, the light emitting board and the receiving light board are connected using a flexible flat cable, so that the light emitting board, the receiving light board, and the FPCB are connected into an integrated structure, which reduces the difficulty of installing the light emitting board and the receiving light board during the installation and assembly of the wire control unit, thereby reducing the risk of poor electrical connection between the light emitting board, the receiving light board, and the FPCB, which can improve the functional stability of the FPCB and reduce the manufacturing cost of the galvanometer motor.

[0034] In some embodiments, the FPCB board 111 may include multiple parts. Such as a main body 1111, a connecting portion 1112 and a board connecting portion 1113. Among them, the main body 1111 can be used to set the receiving light board 114 and can be connected to the shell unit; one end of the connecting portion 1112 is connected to the main body 1111, and the other end is connected to an external device (such as an external power supply); one end of the board connecting portion 1113 is connected to the main body, and the other end can be connected to the light-emitting light board. In some embodiments, a through hole 1114 can be opened on the main body 1111, which can be used to accommodate the passage of the rotating shaft, which can facilitate the detection of the rotation of the rotating shaft. In some embodiments, a connecting column 1115 can also be provided on the main body 1111, which is provided on the side of the FPCB board close to the shell unit and can be used to connect to the shell unit.

[0035] In some embodiments, the back cover 112 is buckled onto the main body of the FPCB board and forms a cavity 115 with the FPCB board, which can be used to accommodate the rotating shaft passing through the FPCB board. In some embodiments, the back cover 112 may also include a receiving groove 1121, which can be used to accommodate the light-emitting light board. In some embodiments, the back cover 112 may also include an opening 1122, which is located in the receiving groove and communicates with the cavity 115, so that the light-emitting light board can be connected to the cavity. In some embodiments, the material of the back cover 113 can be metal, which is beneficial to increase the structural strength of the wire control unit, improve the overall mechanical strength of the galvanometer motor, and also help the wire control unit dissipate heat, prevent local overheating, improve the heat dissipation efficiency of the galvanometer motor, and can also reduce maintenance and replacement costs, and improve the reliability and economy of the galvanometer motor.

[0036] In some embodiments, the light-emitting panel 113 and the receiving panel 114 are positioned relative to each other, with the light-emitting panel transmitting signals and the receiving panel receiving signals to detect the movement of the rotating shaft. In some embodiments, both the light-emitting panel and the receiving panel are connected to the cavity 115 to facilitate detection of the rotating shaft within the cavity. In some embodiments, the light-emitting panel is a light-emitting diode panel that can produce a uniform wide-angle light field, and the receiving panel is a photovoltaic module, which facilitates detection of the rotating shaft.

[0037] In some embodiments, the remote control unit may further include a light shielding plate 116, which may be disposed in the cavity 115 and connected to a rotating shaft extending through the cavity 115. The light shielding plate 116 detects the rotation angle by changing the area of the light-emitting light panel 113 that is illuminated by the light-receiving light panel 114. The light shielding plate 116 may be a fan-shaped sheet made of a non-reflective, opaque material to block light.

[0038] like Figure 4 Combined with Figure 1 、 Figure 2 As shown, in some embodiments, the housing unit 120 includes a stator assembly 121, a rotor assembly 122 and a housing 123, wherein the stator assembly 121 is disposed in the housing 123 and is used to generate a static magnetic field, and the rotor assembly 122 is disposed in the stator assembly 121 so that when the rotor assembly generates a magnetic field, the rotor assembly interacts with the magnetic field of the stator assembly to generate a torque, causing the rotor assembly to rotate.

[0039] Figure 6 FIG. 1 is a schematic diagram of a stator assembly according to an embodiment of the present application. Figure 6 Combined with Figure 2As shown, in some embodiments, the stator assembly 121 includes a stator 1211 and a coil 1212. The coil 1212 is nested in the stator 1211. In some embodiments, the coil 1212 and the stator 1211 can be potted with glue, the surface of the coil 1212 can be sealed with glue, and the coil and stator can be glued and fixed to each other, which helps protect the coil and improves the insulation performance of the coil, the overall mechanical strength of the stator assembly, and the stability and service life of the stator assembly.

[0040] Combine Figure 6 As shown, in some embodiments, the stator 1211 can be shaped as an annular cylinder, which includes a through hole inside and runs through the entire stator, so that the coil 1212 can be placed in the stator 1211. In some embodiments, the internal through hole of the stator 1211 can also be a non-uniform diameter structure, for example: the diameter near the two ends of the stator is smaller, and the diameter near the middle part of the stator is larger. The coil is arranged in the middle part of the stator, and the diameter at both ends of the through hole is smaller, so that the coil can be limited and fixed. In some embodiments, the material of the stator can be a magnetic conductive material. For example: electrical pure iron, low carbon steel, magnetic conductive stainless steel, nickel alloy, etc., which is conducive to reducing magnetic resistance, reducing eddy current loss, hysteresis loss and magnetic field leakage, and can improve the utilization rate and magnetic efficiency of the magnetic field, so that the galvanometer motor can be reduced in size under the same power, improve the compactness of the galvanometer motor design, and can also improve the mechanical strength, heat resistance and heat dissipation capacity of the stator assembly, which is conducive to the galvanometer motor adapting to harsh working conditions.

[0041] In some embodiments, the coil 1212 includes a plurality of mutually arranged wires, and the plurality of wires are connected end to end and laid on the inner wall of the stator through hole. Figure 6 As shown, according to one embodiment of the present application, two coils 1212 are laid relative to each other on the inner wall of the through hole inside the stator 1211, which is conducive to quickly and accurately controlling the rotation of the rotor assembly, and can also improve the control accuracy, reduce electromagnetic interference, and optimize the motor performance to meet the different motion requirements of the galvanometer motor. In some embodiments, the wire is an enameled wire, which can ensure the electrical performance of the coil, is beneficial to the insulation between adjacent wires in the coil, and prevents short circuits from affecting the normal use of the galvanometer motor. In some embodiments, the multiple wires of the coil 1212 are bonded to each other, which is conducive to improving the mechanical strength of the coil.

[0042] like Figure 2 Combined with Figure 4 As shown, in some embodiments, the rotor assembly 122 includes a rotating shaft 1221 and a magnetic column 1222 disposed on the rotating shaft 1221. The rotating shaft 1221 is disposed in the coil 1212, and at least one end thereof passes through the coil 1212. In some embodiments, the end of the rotating shaft 1221 passing through the coil 1212 can be connected to a lens unit, thereby controlling the lens unit to steer the laser beam.

[0043] In some embodiments, when the rotating shaft 1221 is passed through the coil 1212, the magnetic column 1222 is located within the range covered by the coil, and a magnetic air gap is included between the coil and the magnetic column, which can isolate the stator assembly and the rotor assembly, prevent the rotor assembly from rubbing or colliding during rotation, protect the galvanometer motor from damage, and is beneficial to the heat dissipation and cooling of the galvanometer motor, as well as reduce the noise and vibration of the galvanometer motor, so that the galvanometer motor can adapt to different working conditions. In some embodiments, the spacing of the magnetic air gap can be less than 1.1mm. Compared with the existing galvanometer motor, the magnetic air gap of the galvanometer motor of the present application can be optimized and reduced by 0.5-1mm, which can reduce the volume of the galvanometer motor, reduce the excitation current, improve the power factor, and thus improve the dynamic response of the galvanometer motor.

[0044] According to one embodiment of the present application, the torque of multiple galvanometer motors is tested when the length of the motor of the present application is shortened by 4 mm and the outer diameter of the magnetic column remains unchanged. See Table 1 and Table 2 for details. Table 1 shows the torque test results of multiple existing galvanometer motors, and Table 2 shows the torque test results of multiple galvanometer motors of the present application.

[0045] Table 1

[0046]

[0047] Table 2

[0048]

[0049]

[0050] As shown in Tables 1 and 2, the torque of existing galvanometer motors is 4.7-5.7 mN·m, with an average of 5.5 mN·m; while the torque of the galvanometer motor of the present application is 6-7 mN·m, with an average of 6.2 mN·m. Therefore, it can be concluded that the galvanometer motor of the present application can increase torque by approximately 12.7% while being smaller than existing galvanometer motors.

[0051] like Figure 2As shown, in some embodiments, the two ends of the rotating shaft 1221 are rotatably fixed in the housing 123 by the first bearing 101 and the second bearing 102 respectively, and a magnetic air gap is retained between the magnetic column 1222 and the coil 1212, so as to facilitate the rotation of the rotating shaft in the stator coil. In some embodiments, the first bearing and the second bearing can be arranged at both ends of the housing 123, which is convenient for the installation of the galvanometer motor and is conducive to the precise control of the spacing of the magnetic air gap. According to one embodiment of the present application, the first bearing 101 can be arranged in the bearing seat 103, one end of the bearing seat 103 is connected to the first end of the housing, and the other end is connected to the wire control unit, which is conducive to the installation and assembly of the galvanometer motor, and because the relative position of the bearing seat remains unchanged, the concentricity of the bearing seat and the housing can remain unchanged, thereby improving the concentricity of the parts in the galvanometer motor.

[0052] In some embodiments, the bearing seat 103 may include a bearing cavity 1031, which can be used to accommodate the first bearing 101 and a portion of the rotating shaft. In some embodiments, the bearing seat 103 may also include a through-hole 1032, which is connected to the bearing cavity 1031 and extends through the bearing seat 103. This can accommodate the rotating shaft and extend into the cavity 115 of the remote control unit, facilitating the remote control unit to detect the rotation of the rotating shaft and thereby precisely control the movement of the galvanometer motor. In some embodiments, the bearing seat 103 may include a boss 1033, which can extend into one end of the housing and form an interference fit with the housing to facilitate adjustment of the concentricity of the various components of the galvanometer motor during installation. In some embodiments, an adhesive layer can be included between the boss 1033 and the inner wall of the housing to secure the bearing seat and the housing and determine the relative position between the bearing seat and the housing. In some embodiments, the bearing seat 103 may also include one or more connecting holes 1034, located on the surface away from the boss, which can be used to connect to the connecting posts of the FPCB.

[0053] In some embodiments, the second bearing 102 may also be disposed in the bearing seat and connected to the second end of the housing. According to one embodiment of the present application, the second bearing 102 is disposed within the housing and close to the second end of the housing, and the axial position of the second bearing is limited by a limit device. Utilizing the second bearing connected to the fixed housing can effectively ensure the magnetic air gap between the magnetic column and the coil, facilitate determining the position of the rotor assembly, and facilitate the installation and assembly of the galvanometer motor.

[0054] In some embodiments, the housing 123 is cylindrical and includes a housing body and a fixing plate 1232 tangentially protruding from the outer periphery of the housing body to facilitate secure connection between the galvanometer motor and an external device (such as a laser emitter). Since the galvanometer motor manipulates the laser beam via the lens unit, the angle between the fixing plate and the lens's active surface must meet certain angular precision requirements, with a tolerance of no more than 1°, to ensure that the laser beam's illumination range after reflection by the lens in the lens unit is within a predetermined range. In some embodiments, the housing 123 may also include multiple cavities for accommodating the aforementioned components of the housing unit, including but not limited to a stator assembly cavity for accommodating the stator assembly, a bearing seat cavity for accommodating the bearing seat, and a bearing cavity for accommodating the second bearing. In some embodiments, the housing 123 may be integrally formed, such as by die-casting or extrusion, to facilitate fabrication and reduce manufacturing costs. In some embodiments, the housing 123 may also be machined, for example, to form multiple different cavities within the housing. In some embodiments, the housing is made of a non-magnetic material. For example, aluminum alloy, stainless steel, etc. can be used for electromagnetic shielding, which is beneficial to reduce magnetic field interference, reduce costs, improve efficiency, reliability and heat dissipation performance, thereby improving the overall performance and life of the galvanometer motor.

[0055] Combine Figure 4 、 Figure 1 and Figure 2 In some embodiments, the limiting device may include: a limiting horizontal shaft 104 and a limiting washer 105. The limiting horizontal shaft 104 may be disposed at the end of the rotating shaft that passes through the coil and connects to the lens unit. The limiting washer may be fixedly connected to the second end of the housing to limit the axial position of the second bearing and accommodate the limiting horizontal shaft 104 to limit the rotational position of the rotating shaft. This helps optimize the function of the limiting device, facilitates assembly of the second bearing, and reduces the assembly cost of the galvanometer motor.

[0056] Figure 7Schematic diagram of a limiting horizontal axis according to an embodiment of the present application. In some embodiments, the limiting horizontal axis 104 is radially penetrated on the rotating shaft and is interference-connected with the rotating shaft to facilitate the installation and assembly of the limiting horizontal axis. In some embodiments, the limiting horizontal axis 104 can also be a part of the rotating shaft or rotor assembly. For example, the limiting horizontal axis is integrally formed with the rotating shaft and forms a limiting structure of the galvanometer motor with a limiting washer provided on the housing. In some embodiments, the limiting horizontal axis 104 is cylindrical in shape and includes a horizontal axis body 1041, and includes a through hole 1042 passing through the horizontal axis body 1041. In some embodiments, the horizontal axis body 1041 can also include an opening 1043, which passes through at least a portion of the side wall of the horizontal axis body 1041 and is connected to the through hole 1042, which is conducive to changing the diameter of the limiting horizontal axis by pressing the limiting horizontal axis, facilitating the pressing of the limiting horizontal axis onto the rotating shaft, and improving the yield rate of the galvanometer motor. In some embodiments, the limiting horizontal axis can be an elastic cylindrical pin.

[0057] like Figure 7 As shown, in some embodiments, the limiting washer 105 includes a washer body 1051 and a through hole 1052, a limiting groove 1053, and one or more connecting holes 1054 provided on the washer body 1051. The through hole 1052 is provided in the middle of the washer body and can be used to accommodate the passage of the rotating shaft. The limiting groove is connected to the through hole 1052 and is used to accommodate the limiting horizontal axis radially provided on the rotating shaft. The connecting holes 1054 are provided at the edges of the washer body 1051 and are used to limit the washer and fix it to the housing. In some embodiments, the limiting groove 1053 can include grooves arranged opposite to each other in upper and lower directions, and the grooves extend from the through hole 1052 to the outside of the washer body.

[0058] In some embodiments, the limiting washer 105 is connected to the second end of the housing by a connecting member 106. In some embodiments, the connecting member 106 can be a bolt. In some embodiments, the limiting device can further include a connecting ring 107, which is arranged on the side of the limiting washer away from the housing and is connected to the connecting member 106, so that the limiting washer can be clamped between the housing and the connecting ring. In some embodiments, the connecting ring 107 includes one or more connecting holes 1071, which can be used to cooperate with the connecting member 106 for connection. In some embodiments, the connecting ring 107 covers at least a portion of the limiting groove 1053, which can be used to limit the axial position of the limiting transverse axis accommodated in the limiting groove.

[0059] Specifically, when the rotating shaft rotates, the limiting horizontal shaft rotates accordingly, and the two ends of the limiting horizontal shaft are accommodated in the limiting groove. Under normal circumstances, the slot angle of the limiting groove is within the range of ±20°. One end of the rotating shaft passes through the coil and is connected to the lens in the lens unit through the lens holder and drives the lens to flip. When the limiting horizontal shaft rotates in the limiting groove and approaches the side wall of the limiting groove, the limiting groove blocks the limiting horizontal shaft, making it impossible for the limiting horizontal shaft to rotate, and then the rotating shaft is also unable to rotate, thereby achieving the purpose of limiting the position of the lens. The limiting mechanism of the present application is close to the lens unit and can effectively limit the position of the lens, thereby improving the dynamic response of the galvanometer motor. Moreover, the limiting mechanism of the present application has a simple structure and is easy to install, which greatly reduces the difficulty of assembling the galvanometer motor.

[0060] The above embodiments are only used to illustrate the present application and are not intended to limit the present application. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the scope of the present application. Therefore, all equivalent technical solutions should also fall within the scope disclosed in the present application.

Claims

1. A galvanometer motor with a limiting mechanism, comprising: The wire control unit, housing unit, and lens unit are connected in sequence, wherein the housing unit includes a housing, and a stator assembly and a rotor assembly are disposed inside the housing. The rotor assembly includes a rotating shaft and a limiting horizontal shaft radially extending through the rotating shaft; a first end of the housing is connected to a bearing seat, and a second end of the housing is connected to a limiting washer; In which, the two ends of the rotating shaft are rotatably fixed in the housing through a first bearing and a second bearing respectively, the first bearing is arranged in the bearing seat, and the second bearing is arranged in the housing and close to the second end of the housing, and the limiting washer blocks and limits the axial position of the second bearing; the limiting washer has a limiting groove, and the limiting horizontal axis passes through the second end of the housing and can be rotatably accommodated in the limiting groove to form a limiting mechanism.

2. The galvanometer motor with a limiting mechanism according to claim 1, characterized in that: The limiting horizontal axis includes a cylindrical body with a first through hole. The cylindrical body includes an opening. The opening passes through at least a portion of the side wall of the cylindrical body and is connected to the first through hole.

3. The galvanometer motor with a limiting mechanism according to claim 1, characterized in that: The limiting washer includes a second through hole and one or more first connecting holes, the second through hole is located in the middle of the limiting washer, and is used to accommodate the passage of the rotating shaft; the limiting groove includes a first groove and a second groove arranged opposite to each other in the upper and lower parts, the first groove and the second groove extend from the second through hole to the outside of the limiting washer, and are used to accommodate the limiting horizontal axis; the connecting hole is used to fix the limiting washer to the outer shell.

4. The galvanometer motor with a limiting mechanism according to claim 3, characterized in that: Further including: A connecting piece connects the limiting washer and the housing.

5. The galvanometer motor with a limiting mechanism according to claim 4, characterized in that: Further including: A connecting ring is provided on a side of the limiting washer away from the housing, and the connecting ring at least partially covers the first groove and the second groove.

6. The galvanometer motor with a limiting mechanism according to claim 5, characterized in that: The connecting ring includes one or more second connecting holes, which are connected to the connecting member and clamp the limiting washer between the shells.

7. The galvanometer motor with a limiting mechanism according to claim 1, characterized in that: The stator assembly includes a coil and a stator, wherein the coil is nested in the stator.

8. The galvanometer motor with a limiting mechanism according to claim 7, characterized in that: The stator is a magnetic ring, and the stator is bonded to the coil.

9. The galvanometer motor with a limiting mechanism according to claim 1, characterized in that: The wire control unit includes: an FPCB board, a back cover, a light emitting board and a receiving light board. The receiving light board is arranged on the FPCB board, the light emitting board is arranged on the back cover, the back cover is buckled on the FPCB board, and the light emitting board and the receiving light board are connected using a flexible cable.

10. The galvanometer motor with a limiting mechanism according to claim 9, characterized in that: The material of the back cover is metal.

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