Galvanometer motor and handheld laser welding gun

Abstract

The galvanometer motor comprises a galvanometer, an adjusting support and a driving motor, the driving motor comprises a motor body and an output shaft connected with the motor body, and the adjusting support is connected with the output shaft and the galvanometer and used for adjusting the included angle between the plane where the galvanometer is located and the output shaft. Therefore, the included angle between the plane where the galvanometer is located and the output shaft meets the installation standard, manufacturing and assembling errors are eliminated, the yield of the galvanometer motor is increased, and the manufacturing cost of the galvanometer motor is reduced. When the galvanometer motor is applied to the handheld laser welding gun, due to the fact that the yield of the galvanometer motor is high, the manufacturing cost of the handheld laser welding gun is reduced.

Description

Technical Field

[0001] This utility model relates to the field of laser processing technology, and in particular to a galvanometer motor and a handheld laser welding gun. Background Technology

[0002] In the field of laser processing, a galvanometer motor is a special type of oscillating motor. By controlling the rotation angle of its output shaft, the oscillation angle of the lens connected to it can be controlled, thereby constraining and manipulating the laser beam. Typically, the output shaft of the galvanometer motor and the lens are connected and fixed via a connector structure to maintain a preset angle between them. However, during manufacturing and assembly, machining errors can easily lead to deviations or defects in the angle between the lens and the galvanometer motor's output shaft, resulting in a lower product cost and higher manufacturing costs. Utility Model Content

[0003] The purpose of this invention is to propose a galvanometer motor and a handheld laser welding gun, which aims to solve the problem that in the manufacturing and assembly process of existing lenses and galvanometer motors, the angle between the lens and the output shaft of the galvanometer motor is easily deviated or unqualified due to processing errors, resulting in low product cost and high manufacturing cost.

[0004] In a first aspect, the present invention provides a galvanometer motor, the galvanometer motor including a galvanometer, an adjusting bracket and a drive motor, the drive motor including a motor body and an output shaft connected to the motor body, the adjusting bracket connecting the output shaft and the galvanometer, and used to adjust the angle between the plane of the galvanometer and the output shaft.

[0005] In one embodiment, the adjusting bracket includes a first connecting frame, a second connecting frame, and an adjusting member. The first connecting frame is fixed to the end of the output shaft away from the motor body. One end of the second connecting frame is rotatably connected to the first connecting frame, and the other end is provided with the galvanometer. The adjusting member passes through the first connecting frame and abuts against the second connecting frame to lock the rotational state of the second connecting frame relative to the first connecting frame.

[0006] In one embodiment, the adjusting bracket further includes a rotating shaft, and the first connecting frame includes a first side plate and a second side plate disposed opposite to each other. The rotating shaft passes through the first side plate, the second connecting frame, and the second side plate to rotatably connect the second connecting frame to the first connecting frame.

[0007] In one embodiment, the second connecting frame is provided with a fixing groove;

[0008] In this configuration, a portion of the galvanometer is bonded and fixed within the fixing groove, or the galvanometer is snapped and fixed within the fixing groove.

[0009] In one embodiment, the adjusting bracket is provided with weight-reducing holes; and / or,

[0010] The motor body is capable of driving the output shaft to vibrate at a frequency of not less than 20,000 Hz.

[0011] In one embodiment, the angle between the plane containing the galvanometer and the output shaft is between 0° and 45°; and / or,

[0012] The vertical distance between the center point of the galvanometer and the extension line of the output shaft is 0-6mm.

[0013] In one embodiment, the galvanometer is a glass mirror, a crystal mirror, or a metal mirror made of a metallic material. The galvanometer includes a reflective surface and a cooling surface disposed opposite each other. The reflective surface of the metal mirror is coated with a metallic film layer formed of a metallic material; and / or,

[0014] The plane containing the galvanometer is set at an acute angle to the output shaft.

[0015] Secondly, this utility model also provides a handheld laser welding gun, which includes the galvanometer motor of any of the above embodiments.

[0016] In one embodiment, the handheld laser welding gun is provided with an optical path channel extending in a first direction, a gun barrel extending in a second direction, and a mounting cavity connecting the optical path channel and the gun barrel.

[0017] The handheld laser welding gun also includes several connectors. A connecting plate is provided on the outer wall of the motor body. The connecting plate is provided with several connecting holes. The several connecting holes are distributed circumferentially at intervals on the connecting plate. The several connectors are correspondingly inserted through the several connecting holes and are detachably connected to the cavity wall of the mounting cavity so as to install the galvanometer motor in the mounting cavity.

[0018] In one embodiment, the connecting plate is provided with a sealing groove, and the sealing ring is accommodated in the groove wall of the sealing groove and elastically abuts against the cavity wall of the mounting cavity.

[0019] The present invention has the following beneficial effects:

[0020] The galvanometer motor of this invention uses an adjusting bracket that connects the output shaft and the galvanometer, and is used to adjust the angle between the plane of the galvanometer and the output shaft, so that the angle between the plane of the galvanometer and the output shaft meets the installation standard, eliminating manufacturing and assembly errors, increasing the yield of the galvanometer motor, and reducing the manufacturing cost of the galvanometer motor.

[0021] Applying the aforementioned galvanometer motor to a handheld laser welding gun reduces the manufacturing cost of the handheld laser welding gun due to the high yield rate of the galvanometer motor. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] in:

[0024] Figure 1 This is a schematic diagram of the galvanometer motor in a handheld laser welding gun in one embodiment.

[0025] Figure 2 for Figure 1 The diagram shows another angle of the galvanometer motor.

[0026] Figure 3 for Figure 1 The top view of the galvanometer motor is shown.

[0027] Figure 4 for Figure 1 The diagram shows the optical path of the galvanometer motor.

[0028] Reference numerals: 100, galvanometer; 110, reflecting surface; 120, cooling surface; 130, metal film layer;

[0029] 200. Adjusting bracket; 210. First connecting frame; 211. First side plate; 212. Second side plate; 220. Second connecting frame; 221. Fixing groove; 222. Weight reduction hole; 230. Adjusting component; 240. Rotating shaft;

[0030] 300. Drive motor; 310. Motor body; 311. Connecting plate; 312. Connecting hole; 313. Sealing groove; 320. Output shaft. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of the stated features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] This utility model discloses a handheld laser welding gun, which can perform laser welding and other laser processing on workpieces. One embodiment of the handheld laser welding gun includes a galvanometer motor, which is used to adjust the transmission direction of the laser beam, thereby performing laser processing on the workpiece using the laser beam.

[0035] In one embodiment, please refer to Figures 1 to 4 The galvanometer motor includes a galvanometer 100, an adjustment bracket 200, and a drive motor 300. The drive motor 300 includes a motor body 310 and an output shaft 320 connected to the motor body 310. The adjustment bracket 200 connects the output shaft 320 and the galvanometer 100 and is used to adjust the angle between the plane where the galvanometer 100 is located and the output shaft 320, so that the angle between the plane where the galvanometer 100 is located and the output shaft 320 meets the installation standard, eliminates manufacturing and assembly errors, increases the yield of the galvanometer motor, and thus reduces the manufacturing cost of the handheld laser welding gun.

[0036] In one embodiment, please refer to Figures 1 to 4The adjusting bracket 200 includes a first connecting bracket 210, a second connecting bracket 220, and an adjusting member 230. The first connecting bracket 210 is fixed to the end of the output shaft 320 away from the motor body 310. One end of the second connecting bracket 220 is rotatably connected to the first connecting bracket 210, and the other end is provided with a galvanometer 100. The adjusting member 230 passes through the first connecting bracket 210 and abuts against the second connecting bracket 220 to lock the rotation state of the second connecting bracket 220 relative to the first connecting bracket 210. With this configuration, after the second connecting frame 220 rotates to a preset angle relative to the first connecting frame 210, the adjusting member 230 can lock the rotation state of the first connecting frame 210 and the second connecting frame 220, keeping the rotation state of the second connecting frame 220 relative to the first connecting frame 210 unchanged. This allows for fine-tuning of the angle between the first connecting frame 210 and the second connecting frame 220, thereby adjusting the angle between the plane where the galvanometer 100 is located and the output shaft 320 to a preset angle, meeting the installation standards, eliminating manufacturing and assembly errors, and increasing the yield of the galvanometer motor.

[0037] Furthermore, in this embodiment, the adjusting bracket 200 also includes a rotating shaft 240. The first connecting bracket 210 includes a first side plate 211 and a second side plate 212 disposed opposite to each other. The rotating shaft 240 passes through the first side plate 211, the second connecting bracket 220, and the second side plate 212 to rotatably connect the second connecting bracket 220 to the first connecting bracket 210. This arrangement facilitates the rotatable connection of one end of the second connecting bracket 220 to the first connecting bracket 210. Specifically, the adjusting member 230 can be selected as a screw or bolt. The first side plate 211 or the second side plate 212 is provided with screw holes adapted to the adjusting member 230.

[0038] Of course, in other embodiments, an arc-shaped groove may also be provided on the first side plate 211 or the second side plate 212, and a screw hole may be provided on the second connecting frame 220. The adjusting member 230 passes through the arc-shaped groove and is threadedly connected to the screw hole of the second connecting frame 220 to lock the rotation state of the first connecting frame 210 and the second connecting frame 220.

[0039] In one embodiment, please refer to Figures 1 to 4 The second connecting frame 220 has a fixing groove 221, and a part of the galvanometer 100 is glued and fixed in the fixing groove 221, thereby stably installing the galvanometer 100 on the second connecting frame 220.

[0040] Specifically, the wall of the fixing groove 221 is fitted with the galvanometer 100 with a clearance to reduce friction during assembly. Adhesive is applied between the fixing groove 221 and the galvanometer 100 to maintain the position of the galvanometer 100 and the second connecting bracket 220. Furthermore, to prevent the adjusting bracket 200 from loosening during ultrasonic vibration, screws can be used to fix the galvanometer 100 to the second connecting bracket 220 in addition to the adhesive fixation between the fixing groove 221 and the galvanometer 100. Of course, in other embodiments, the galvanometer 100 can also be snap-fitted into the fixing groove 221, or the fixing groove 221 and the galvanometer 100 can be threaded together.

[0041] In one embodiment, please refer to Figures 1 to 4 The adjusting bracket 200 is provided with a weight reduction hole 222, which reduces the swing inertia of the adjusting bracket 200, reduces the load on the drive motor 300, adapts to the low-power drive motor 300, and increases the service life of the drive motor 300.

[0042] In one embodiment, the plane where the galvanometer 100 is located is set at an angle of 0°-90° to the output shaft 320, so that the installation angle of the galvanometer motor can be designed according to the handheld laser welding gun, which facilitates the flexible distribution of the galvanometer motor on the handheld laser welding gun and is conducive to the miniaturization design of the handheld laser welding gun.

[0043] Specifically, when the plane where the galvanometer 100 is located is set at a 0° angle to the output shaft 320, the output shaft 320 is located on the plane where the galvanometer 100 is located. In addition, the plane where the galvanometer 100 is located can also be set at an acute angle to the output shaft 320 or be set perpendicular to it.

[0044] Furthermore, in this embodiment, the angle between the plane containing the galvanometer 100 and the output shaft 320 is between 0° and 45°, such as... Figure 4 As shown in angle α, specifically, the angle between the plane where the galvanometer 100 is located and the output shaft 320 can be selected as 0°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, or 45°. This setting reduces the sway angle of the output shaft 320 in the drive motor 300, thereby reducing the load inertia of the drive motor 300 and facilitating the placement of the drive motor 300.

[0045] Furthermore, in this embodiment, the vertical distance between the center point of the galvanometer 100 and the extended line of the output shaft 320 is 0mm-6mm, such as... Figure 4As shown in Figure L, specifically, the vertical distance between the center point of the galvanometer 100 and the extended line of the output shaft 320 can be selected as 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, or 6mm. This setting can compensate for the swing angle of the output shaft 320 in the drive motor 300, achieving a large swing amplitude. Under the condition of constant power of the drive motor 300, the swing frequency of the output shaft 320 in the drive motor 300 can be increased, thereby extending the service life of the drive motor 300 and adapting to various motors of high and low power.

[0046] By limiting the dimensions as described above, the laser processing effect is better when the distance from the center of the reflective surface 110 to the laser landing point is between 98mm and 108mm. Specifically, the distance from the center of the reflective surface 110 to the laser landing point can be selected as 98mm, 100mm, 103mm, 105mm or 108mm.

[0047] In one embodiment, the motor body 310 can drive the output shaft 320 to vibrate at a frequency of not less than 20,000 Hz, thereby enabling ultrasonic dust removal.

[0048] Understandably, the vibration frequency of the motor body 310 driving the galvanometer 100 is typically between 200Hz and 650Hz. Within this frequency range, the galvanometer 100 can be driven to perform its regular functions, changing the circular spot to a straight spot, reducing the assembly gap requirements of the welded parts during the welding process, thereby achieving a larger weld pool and better weld strength.

[0049] Since the motor body 310 in this embodiment is equipped with an ultrasonic dust removal function that vibrates at a frequency of not less than 20,000 Hz, in addition to its original functions, when the handheld laser welding gun needs maintenance, the ultrasonic dust removal function can remove the dust on the galvanometer 100 in just a few minutes, thus ensuring a high reflectivity of the galvanometer 100. Specifically, the drive motor 300 can be selected from resonant ultrasonic motors, vibration motors, wave-shaped ultrasonic motors, and piezoelectric ceramic drive motors, etc. Under normal working conditions, the drive motor can drive the galvanometer to swing to achieve optical path adjustment. When maintenance is required, the ultrasonic dust removal function can be achieved by switching the operating frequency of the drive motor 300 through the controller.

[0050] In one embodiment, please refer to Figures 1 to 4The galvanometer 100 is a metal mirror made of a metallic material. The galvanometer 100 includes a reflecting surface 110 and a cooling surface 120 arranged opposite each other. A metallic film layer 130 formed of a metallic material is deposited on the reflecting surface 110. The metallic film layer 130 ensures that the reflecting surface 110 has a high reflectivity, that is, a reflectivity greater than or equal to 99.9%, in order to reduce energy loss and heat generation, thus ensuring that the output energy meets the requirements of laser processing such as laser welding. Specifically, the reflecting surface 110 is deposited with a film layer formed of aluminum, gold, or silver. Among these, the film layer formed of gold has better reflectivity than that formed of silver, and the film layer formed of aluminum has higher durability than that formed of gold or silver.

[0051] Furthermore, in this embodiment, the galvanometer 100 is a mirror body made of copper or stainless steel. It is understood that, compared to existing glass lenses and crystal lenses, the galvanometer 100 of this embodiment has better structural strength, better surface flatness, and lower manufacturing cost.

[0052] Meanwhile, when using glass mirrors, the film layer on its reflective surface 110 is usually a dielectric film, that is, a non-metallic compound film layer. The coating process for this film layer is both thick and costly. The high thickness of this film layer can easily lead to the formation of pits in some areas of the reflective surface 110. These pits absorb heat, which causes the temperature of the glass mirror to rise, affecting the reflectivity of the glass mirror and making it susceptible to high temperatures.

[0053] In this embodiment, the galvanometer 100 has a metal film layer 130. While maintaining its reflectivity, the metal film layer 130 is thinner than that of a dielectric film. The metal film layer 130 has fewer coating impurities, resulting in higher quality and lower cost. It absorbs less heat, exhibits more stable optical performance at high temperatures, can withstand higher power lasers, and has higher reliability, thus improving the overall performance of the handheld laser welding gun.

[0054] Specifically, the thickness of the galvanometer 100 is 0.8mm-1.2mm. The thinner the galvanometer 100, the better, to reduce weight while maintaining its strength. Specifically, the thickness of the galvanometer 100 can be selected as 0.8mm, 0.9mm, 1.0mm, 1.1mm, or 1.2mm. The flatness of the galvanometer 100 is no higher than 100nm, and the mirror surface of the galvanometer 100 is arc-shaped to ensure the reflectivity of its reflecting surface 110. Specifically, the shape of the galvanometer 100 can be prismatic, circular, elliptical, or rectangular, so that the reflecting surface 110 of the galvanometer 100 can effectively accommodate all the beam spots of the laser beam.

[0055] In one embodiment, please refer to Figures 1 to 4The handheld laser welding gun has an optical path channel extending in a first direction, a gun barrel extending in a second direction, and a mounting cavity connecting the optical path channel and the gun barrel. The galvanometer motor is installed in the mounting cavity, and the output shaft 320 of the drive motor 300 is set at an angle to the second direction, which helps to reduce the installation size of the galvanometer motor in the first direction after installation, and facilitates the miniaturization design of the handheld laser welding gun.

[0056] In this embodiment, the handheld laser welding gun also includes several connectors. A connecting plate 311 is provided on the outer wall of the motor body 310, and several connecting holes 312 are provided on the connecting plate 311. The several connecting holes 312 are distributed circumferentially at intervals on the connecting plate 311. Several connectors are correspondingly inserted into the several connecting holes 312 and are detachably connected to the cavity wall of the mounting cavity to install the galvanometer motor in the mounting cavity. With the setting of the galvanometer motor, the laser beam from the optical path channel can be reflected by the galvanometer motor and transported along the central axis of the gun barrel.

[0057] Specifically, the connecting hole 312 can be a threaded hole, which can be used to improve the installation accuracy of the motor body 310, such as the coaxiality between the motor body 310 and the mounting hole in the mounting cavity. Furthermore, a number of connecting holes 312 are evenly distributed around the flange, and the number of connecting holes 312 can be 2, 3, 4 or other quantities.

[0058] In one embodiment, please refer to Figures 1 to 4 The connecting plate 311 is provided with a sealing groove 313, and the sealing ring is housed in the groove wall of the sealing groove 313 and elastically abuts against the cavity wall of the mounting cavity. The sealing ring serves two purposes: firstly, it prevents external dust from entering the mounting cavity, thus keeping the galvanometer 100 clean; secondly, by elastically abutting the motor body 310 against the groove wall of the mounting groove, it reduces the problem of vibration of the motor body 310 during handheld laser welding gun use, or loosening of the connection between the motor and the gun body during motor vibration, especially ultrasonic vibration.

[0059] Specifically, the sealing ring is made of silicone, rubber, etc. Furthermore, the sealing ring can be made of fluororubber, which makes it have better high-temperature performance. The width and depth of the sealing groove 313 can be adjusted as needed.

[0060] In this embodiment, the sealing groove 313 is annular, and its width is 0.8mm-1.2mm. Specifically, the width of the sealing groove 313 can be selected as 0.8mm, 0.9mm, 1.0mm, 1.1mm, or 1.2mm. The depth of the sealing groove 313 is 0.7mm-0.9mm. Specifically, the depth of the sealing groove 313 can be selected as 0.7mm, 0.8mm, or 0.9mm.

[0061] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A galvanometer motor characterized by comprising: The galvanometer motor comprises a galvanometer, an adjusting support and a driving motor, the driving motor comprises a motor body and an output shaft connected with the motor body, and the adjusting support connects the output shaft and the galvanometer and is used for adjusting the included angle between the plane where the galvanometer is located and the output shaft.

2. The galvanometer motor according to claim 1, characterized by The adjusting support comprises a first connecting frame, a second connecting frame and an adjusting piece, the first connecting frame is fixed to the end of the output shaft away from the motor body, one end of the second connecting frame is rotationally connected with the first connecting frame, and the other end is provided with the galvanometer, and the adjusting piece penetrates through the first connecting frame and abuts against the second connecting frame to lock the rotational state of the second connecting frame relative to the first connecting frame.

3. The galvanometer motor according to claim 2, characterized by The adjusting support further comprises a rotating shaft, the first connecting frame comprises oppositely arranged first and second side plates, and the rotating shaft penetrates through the first side plate, the second connecting frame and the second side plate to rotationally connect the second connecting frame with the first connecting frame.

4. The galvanometer motor according to claim 2, characterized by A fixing groove is formed in the second connecting frame. Part of the galvanometer is fixedly bonded in the fixing groove, or the galvanometer is fixedly clamped in the fixing groove.

5. The galvanometer motor according to claim 1, characterized by The adjusting support is provided with a weight-reducing hole; and / or The motor body can drive the output shaft to vibrate at a frequency of not less than 20000 Hz.

6. The galvanometer motor according to claim 1, characterized by The included angle between the plane where the galvanometer is located and the output shaft is between 0° and 45°; and / or The perpendicular distance between the center point of the galvanometer and the extension line of the output shaft is 0-6 mm.

7. The galvanometer motor according to claim 1, characterized by The galvanometer is a glass mirror, a crystal mirror or a metal mirror made of a metal material, the galvanometer comprises oppositely arranged reflecting surfaces and cooling surfaces, and a metal film layer made of a metal material is coated on the reflecting surface of the metal mirror; and / or The plane where the galvanometer is located is arranged at an acute angle with the output shaft.

8. A hand-held laser welding gun characterized by, The handheld laser welding gun comprises the galvanometer motor according to any one of claims 1 to 7.

9. The handheld laser welding gun of claim 8, wherein, The handheld laser welding gun is provided with a light path channel extending in a first direction, a gun barrel extending in a second direction and a mounting cavity communicating the light path channel and the gun barrel; The handheld laser welding gun further comprises a plurality of connecting pieces, a connecting disc is arranged on the outer wall of the motor body, a plurality of connecting holes are arranged on the connecting disc, the plurality of connecting holes are distributed at intervals in the circumferential direction of the connecting disc, and the plurality of connecting pieces are one-to-one correspondingly arranged in the plurality of connecting holes and detachably connected with the cavity wall of the mounting cavity to mount the galvanometer motor in the mounting cavity.

10. The handheld laser welding gun of claim 9, wherein, A sealing groove is arranged on the connecting disc, a sealing ring is accommodated in the groove wall of the sealing groove and elastically abuts against the cavity wall of the mounting cavity.

Images