Laser head protection mechanism and laser cutting machine

Abstract

The laser head protection mechanism comprises a base and a movable seat, the base is fixedly connected with a mechanical arm, the movable seat is fixedly connected with a laser head, and the base is provided with a first side face, a second side face and a magnetic attraction part on the first side face and the second side face. The movable seat is provided with a first connecting surface and a second connecting surface, electromagnetic suction plates are arranged on the first connecting surface and the second connecting surface, after assembly, the first connecting surface is attached to the first side surface, the second connecting surface is attached to the second side surface, and the electromagnetic suction plates attract the magnetic suction parts in a power-on state; wherein an anti-falling device is arranged between the movable seat and the base to prevent the movable seat and the laser head from falling, the movable seat is provided with a bearing part and an offset sensor, the bearing part is connected with the base to bear the weight of the movable seat and the laser head, and the offset sensor is used for detecting the deviation value between the movable seat and the base. And the offset sensor is electrically connected with the electromagnetic suction plate. And during collision, the laser head can fall off, and the laser head is prevented from falling off and being broken in cooperation with the anti-falling device.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting technology, and in particular to a laser head protection mechanism and a laser cutting machine. Background Technology

[0002] In related technologies, laser cutting operations are usually carried out by a robotic arm to drive the laser head to achieve automated cutting of workpieces. Due to the complex structure of some workpieces, it is necessary to cut various holes, grooves and other structures inside the workpiece. Accidents may occur during the movement of the laser head, such as the laser head colliding with the workpiece or the fixture, which may lead to problems such as damage to the laser head or the workpiece. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a laser head protection mechanism that can protect the laser head in the event of a collision.

[0004] According to a first aspect of the present invention, a laser head protection mechanism includes a base and a movable seat. A robotic arm is fixedly connected to the base, and a laser head is fixedly connected to the movable seat. The base has a first side and a second side, forming an angle between them. Magnetic suction portions are provided on the first and second side. The movable seat has a first connecting surface and a second connecting surface, and electromagnetic suction plates are provided on the first and second connecting surfaces. After assembly, the first connecting surface adheres to the first side, and the second connecting surface adheres to the second side. The electromagnetic suction plates attract the magnetic suction portions when energized. An anti-drop device is provided between the movable seat and the base to prevent the movable seat and laser head from falling. The movable seat has a load-bearing component and an offset sensor. The load-bearing component is connected to the base to support the weight of the movable seat and the laser head. The offset sensor detects the deviation between the movable seat and the base and is electrically connected to the electromagnetic suction plate.

[0005] The laser head protection mechanism according to the embodiment of this utility model has at least the following beneficial effects:

[0006] In the laser head protection mechanism with the above structure, the robotic arm and the laser head are connected through a base and a movable seat. During normal operation, the first and second sides of the base cooperate with the first and second connecting surfaces of the movable seat, respectively, and the electromagnetic suction plate attracts the magnetic suction part. The weight of the movable seat and the laser head is supported by the load-bearing component. When the laser head collides with the workpiece or the fixture, the movable seat will shift. If the offset sensor detects that the deviation value exceeds the preset range, the electromagnetic suction plate will be de-energized. After losing the attraction force, the movable seat and the laser head can be detached, avoiding hard collisions and preventing damage to the laser head and the workpiece. In addition, an anti-drop device is provided between the movable seat and the base to prevent the movable seat and the laser head from falling and being damaged.

[0007] According to some embodiments of the first aspect of the present invention, a magnetic attraction part is provided on the first side and two magnetic attraction parts are provided on the second side. The magnetic attraction parts are elongated and arranged vertically, and the magnetic attraction parts penetrate the base longitudinally. The shape of the electromagnetic attraction plate matches the magnetic attraction parts.

[0008] According to some embodiments of the first aspect of this utility model, the anti-fall device includes a plurality of tension springs, the two ends of which are respectively fixed to the base and the movable seat by fasteners.

[0009] According to some embodiments of the first aspect of this utility model, the anti-fall device has four tension springs, the fastener is a bolt, and the upper ends of the base and the movable seat are provided with threaded holes for installing the bolts.

[0010] According to some embodiments of the first aspect of the present invention, the load-bearing component is a pin fixed to the movable seat and abuts against the upper end surface of the base, and at least one of the load-bearing components is arranged on the first connecting surface and the second connecting surface.

[0011] According to some embodiments of the first aspect of this utility model, the base is provided with a detection terminal, and after the base and the movable seat are assembled, the detection end of the offset sensor is aligned with the detection terminal.

[0012] According to some embodiments of the first aspect of the present invention, the movable seat is connected to two offset sensors to correspond to the first connecting surface and the second connecting surface, the movable seat is provided with a protective hole, and the detection end of the offset sensor is located in the protective hole.

[0013] According to some embodiments of the first aspect of this utility model, the movable seat is provided with a power terminal, the power terminal is electrically connected to the offset sensor and the laser head, and the electromagnetic suction plate is electrically connected to the laser head.

[0014] According to some embodiments of the first aspect of the present invention, the base is provided with a positioning ball head, the movable seat is provided with a spherical groove that cooperates with the positioning ball head, and the positioning ball head is provided on the first side or the second side.

[0015] The laser cutting machine according to a second aspect embodiment of the present invention includes the laser head protection mechanism described in the first aspect embodiment.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a schematic diagram of the laser head protection mechanism in use according to the second aspect embodiment of the present utility model;

[0019] Figure 2 for Figure 1 A magnified view of point A in the image;

[0020] Figure 3 This is a schematic diagram of the structure of the laser head protection mechanism according to the first aspect of this utility model. Figure 1 ;

[0021] Figure 4 This is a schematic diagram of the structure of the laser head protection mechanism according to the first aspect of this utility model. Figure 2 ;

[0022] Figure 5 This is an exploded view of the laser head protection mechanism according to the first aspect of the present invention. Figure 1 ;

[0023] Figure 6 This is an exploded view of the laser head protection mechanism according to the first aspect of the present invention. Figure 2 .

[0024] Figure label:

[0025] Base 100, first side 101, second side 102, magnetic suction part 110, detection terminal 120, positioning ball head 130, movable seat 200, first connecting surface 201, second connecting surface 202, protective hole 203, spherical groove 204, electromagnetic suction plate 210, load-bearing component 220, offset sensor 230, power terminal 240, laser head 300, anti-fall device 400, tension spring 410, fastener 420, robotic arm 500. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 6 This invention proposes a laser head protection mechanism, which aims to add a protective mechanism to the laser head to protect it during processing and prevent damage from collisions.

[0031] The laser head protection mechanism mainly includes a base 100 and a movable seat 200. The base 100 serves as the fixed foundation for the fixed connection of the robotic arm, while the movable seat 200 is used to fix and install the laser head 300. Through ingenious design, a stable connection under normal working conditions and rapid separation in the event of a collision are achieved.

[0032] The base 100 is generally a square structure, including a first side 101 and a second side 102. The included angle between the first side 101 and the second side 102 can be adjusted according to actual needs to adapt to different installation environments and the working angle of the laser head 300, typically using a 90° angle. At least one magnetic suction part 110 is provided on each of the first side 101 and the second side 102. The magnetic suction part 110 is typically made of steel and is used to cooperate with the electromagnetic suction plate 210 on the movable base 200.

[0033] The movable seat 200 corresponds to the base 100 and has a first connecting surface 201 and a second connecting surface 202. At least one electromagnetic chuck 210 is provided on the first connecting surface 201 and the second connecting surface 202 respectively. When the electromagnetic chuck 210 is energized, it can generate magnetic attraction force and attract each other with the magnetic attraction part 110 on the base 100, thereby realizing a stable connection between the movable seat 200 and the base 100.

[0034] In addition, the movable base 200 is equipped with a load-bearing component 220 and an offset sensor 230. The load-bearing component 220 supports the weight of the movable base 200 and the laser head 300, ensuring that it will not fall off due to gravity during normal operation. The load-bearing component 220 is typically designed as a robust and durable structure, and can be made of metal or high-strength plastic to ensure that it can withstand large loads for a long time. The offset sensor 230 is used to detect the deviation between the movable base 200 and the base 100. When the laser head 300 is impacted, the movable base 200 will shift, and the offset sensor 230 can capture this change in real time and convert it into an electrical signal for transmission.

[0035] To prevent the movable base 200 and laser head 300 from falling due to loss of support when they separate from the base 100, an anti-fall device 400 is installed between the movable base 200 and the base 100. The function of the anti-fall device 400 is to provide a certain supporting force when the movable base 200 falls, preventing the movable base 200 and laser head 300 from falling directly to the ground and injuring the laser head 300.

[0036] The working principle of the laser head protection mechanism in this application is as follows:

[0037] Under normal operating conditions, the first side 101 and the second side 102 of the base 100 are in close contact with the first connecting surface 201 and the second connecting surface 202 of the movable seat 200. When energized, the electromagnetic suction plate 210 generates magnetic attraction, attracting the magnetic suction part 110 on the base 100, thereby achieving a stable connection between the movable seat 200 and the base 100. At the same time, the load-bearing component 220 supports the weight of the movable seat 200 and the laser head 300, ensuring the stability and safety of the entire structure.

[0038] When the laser head 300 collides with the workpiece or fixture during processing, the movable seat 200 will shift. At this time, the offset sensor 230 can detect this change and measure the deviation between the movable seat 200 and the base 100. If the deviation exceeds a preset range, it indicates that the collision force is too large and may damage the laser head 300. In this case, the control system will immediately cut off the power to the electromagnetic chuck 210, causing it to lose its suction force.

[0039] After the electromagnetic suction plate 210 is de-energized, the movable seat 200 and the laser head 300 will no longer be constrained by the base 100, and the two can detach to prevent hard collision. Due to the presence of the anti-fall device 400, the movable seat 200 and the laser head 300 will not fall directly to the ground, thus avoiding damage caused by falling.

[0040] The laser head protection mechanism of this application has significant technical advantages:

[0041] 1. Improved safety: The electromagnetic chuck 210 and the magnetic suction part 110 work together to achieve a stable connection between the movable seat 200 and the base 100. In the event of a collision, the electromagnetic chuck 210 can quickly cut off the power, allowing the movable seat 200 and the laser head 300 to separate in time, avoiding a hard collision and effectively protecting the laser head 300 and preventing the workpiece from being scratched.

[0042] 2. Enhanced stability: The design of the load-bearing component 220 ensures that the movable base 200 and laser head 300 remain stable under normal operating conditions and will not fall off due to gravity. Meanwhile, the real-time monitoring by the offset sensor 230 also ensures the stability and reliability of the entire structure.

[0043] 3. Reduce losses: The anti-fall device 400 effectively prevents damage caused by the movable seat 200 and laser head 300 falling after separation, reducing maintenance and replacement costs.

[0044] 4. Easy to maintain: The laser head protection mechanism of this invention has a simple structure, is easy to disassemble and install, and facilitates daily maintenance. At the same time, the connections between the components are tight and reliable, making it less prone to malfunctions and damage.

[0045] 5. Wide range of applications: Due to the flexibility of the design of the base 100 and the movable seat 200, they can be adjusted and modified according to different application requirements. Therefore, the laser head protection mechanism of the present invention is suitable for various laser processing equipment and scenarios.

[0046] Reference Figures 3 to 6In some embodiments of this application, two magnetic suction parts 110 are provided on the first side 101 of the base 100, and one magnetic suction part 110 is provided on the second side 102, adopting an asymmetrical layout design. The first side 101 corresponds to the connection direction between the base 100 and the movable seat 200. Increasing the number of magnetic suction parts 110 can enhance the adsorption stability. Even if one magnetic suction part 110 fails unexpectedly, the remaining magnetic suction parts 110 can still ensure a reliable connection between the movable seat 200 and the base 100. The magnetic suction part 110 adopts a long strip design and is arranged vertically, which is beneficial to increase the adsorption area and adsorption force. The magnetic suction part 110 penetrates the base 100 longitudinally. Matching the magnetic suction part 110, the electromagnetic suction plate 210 on the movable seat 200 is also designed as a long strip that matches the shape of the magnetic suction part 110, ensuring that the two can form the maximum contact area when they are in contact, maximizing the adsorption effect and improving the stability of use. It should be understood that both the base 100 and the movable seat 200 are provided with slots for installing the magnetic suction part 110 and the electromagnetic suction plate 210, so that after the magnetic suction part 110 and the electromagnetic suction plate 210 are installed, the first side 101, the second side 102, the first connecting surface 201 and the second connecting surface 202 can maintain a flat state, which is beneficial for separation after collision.

[0047] Reference Figures 3 to 6 In some embodiments of this application, the anti-fall device 400 uses multiple tension springs 410 as core components. The two ends of the tension springs 410 are firmly connected to the base 100 and the movable seat 200 by fasteners 420 (such as bolts). The tension springs 410 are selected based on their good elasticity and restoring force, which can provide necessary cushioning when the movable seat 200 falls. At the same time, when the electromagnetic chuck 210 is de-energized and releases the movable seat 200, the tension springs 410 can prevent the movable seat 200 from falling suddenly, avoiding secondary damage to the laser head 300.

[0048] In one specific embodiment, four tension springs 410 are used, distributed on the upper ends of the base 100 and the movable seat 200. In order to simplify the installation process and ensure the firmness of the connection, threaded holes are designed on the upper ends of the base 100 and the movable seat 200 so that bolts can be used as fasteners 420 to directly fix the two ends of the tension springs 410 in place. This not only facilitates installation and maintenance, but also ensures that the anti-fall device 400 can continue to function effectively during long-term use.

[0049] In addition, the anti-fall device 400 can also adopt a structure such as a cable or a net, which can support the movable seat 200 when it falls.

[0050] Reference Figures 3 to 6In some embodiments of this application, the load-bearing component 220 of the present invention is a pin fixed to the movable seat 200. The pin directly abuts against the upper surface of the base 100, bearing the heavy responsibility of supporting the weight of the movable seat 200 and the laser head 300, in conjunction with the magnetic attraction of the electromagnetic chuck 210 and the magnetic attraction part 110. The advantage of using the pin as the load-bearing component 220 is that it has a simple structure, high strength, and is easy to process, and can reliably transmit gravity, ensuring the stability of the movable seat 200 in a static state.

[0051] To improve load-bearing stability, at least one load-bearing component 220 (i.e., a pin) is arranged on the first connecting surface 201 and the second connecting surface 202 respectively. In practical applications, the number and position of the pins can be flexibly adjusted according to the specific size, weight, and expected load of the movable seat 200 to achieve the best load-bearing effect.

[0052] It should be understood that the pin is cylindrical, so the contact area between the pin and the base 100 is small. Under the premise of meeting the support requirements, this facilitates the movable seat 200 to detach from the base 100 and reduces the resistance to movement.

[0053] In addition, the load-bearing component 220 can also adopt a snap-fit ​​or snap-fit ​​structure to fix and support the base 100 and the movable seat 200, so as to meet the requirements of bearing the weight.

[0054] Reference Figure 4 and Figure 6 In some embodiments of this application, a detection terminal 120 is provided on the base 100. After the base 100 and the movable seat 200 are assembled, the detection end of the offset sensor 230 is aligned with the detection terminal 120, so that the offset sensor 230 can accurately and reliably detect the offset of the movable seat 200.

[0055] Furthermore, two offset sensors 230 are connected to the movable base 200, corresponding to the first connecting surface 201 and the second connecting surface 202 respectively. Regardless of the direction in which the movable base 200 shifts, the shift can be detected promptly. Simultaneously, the movable base 200 is also provided with protective holes 203, within which the detection ends of the offset sensors 230 are located, enhancing the stability and reliability of the laser head protection mechanism. The use of two offset sensors 230 provides redundant detection capability; even if one sensor fails, the other can continue to operate. The design of the protective holes 203 protects the detection ends of the offset sensors 230 from direct impacts from external objects, extending the sensor's lifespan.

[0056] In specific implementation, the protective hole 203 can be designed as a circle, square or other shapes to adapt to different models of offset sensor 230. The offset sensor 230 can be a contact type, photoelectric type or through-beam type structure, all of which can meet the usage requirements.

[0057] Reference Figures 3 to 6 In some embodiments of this application, the movable base 200 is provided with a power terminal 240, which is electrically connected to the offset sensor 230 and the laser head 300. Simultaneously, the electromagnetic chuck 210 is also electrically connected to the laser head 300. The laser head 300 supplies power to the offset sensor 230 and the electromagnetic chuck 210, and when disconnected, all three move synchronously without affecting the circuit connection. The laser head 300 receives information output from the offset sensor 230 and controls the on / off state of the electromagnetic chuck 210 to accurately match whether the laser head 300 is in a collision state. In specific implementations, the power terminal 240 can be designed as a pin, socket, or other form of electrical connection element, installed at a predetermined position on the movable base 200.

[0058] Reference Figures 3 to 6 In some embodiments of this application, a positioning ball head 130 is provided on the base 100, and a spherical groove 204 that mates with the positioning ball head 130 is provided on the movable seat 200. The positioning ball head 130 can be provided on the first side 101 or the second side 102 of the base 100 to position the movable seat 200 and improve its stability.

[0059] In the event of an accidental collision that causes the movable seat 200 to detach, workers can quickly restore the movable seat 200 to its assembly position. By utilizing the cooperation of the positioning ball head 130 and the spherical groove 204, the movable seat 200 can be quickly and accurately positioned, reducing downtime and resuming production.

[0060] Reference Figure 1 The second aspect of this utility model provides a laser cutting machine. The robotic arm 500 of the laser cutting machine is connected to the laser head 300 via the laser head protection mechanism of the first aspect embodiment. The robotic arm 500 drives the laser head 300 to move, thereby cutting the workpiece. The laser cutting machine incorporates all the technical solutions of the laser head protection mechanism and possesses all the technical effects of the laser head protection mechanism, which will not be elaborated further.

[0061] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A laser head protection mechanism, characterized by, The utility model relates to a laser head protection mechanism, comprising: a base fixedly connected with a mechanical arm, the base being provided with a first side and a second side forming an included angle between the first side and the second side, the first side and the second side being provided with magnetic attraction parts; a movable seat fixedly connected with a laser head, the movable seat being provided with a first connecting surface and a second connecting surface, the first connecting surface and the second connecting surface being provided with electromagnetic suction plates, after assembly, the first connecting surface is attached to the first side, the second connecting surface is attached to the second side, and the electromagnetic suction plates attract the magnetic attraction parts in the electrified state; wherein a fall-preventing device is arranged between the movable seat and the base to prevent the movable seat and the laser head from falling, the movable seat is provided with a load-bearing component and a deviation sensor, the load-bearing component is connected to the base to bear the weight of the movable seat and the laser head, the deviation sensor is used to detect the deviation value between the movable seat and the base, and the deviation sensor is electrically connected with the electromagnetic suction plates.

2. The laser head protection mechanism of claim 1, wherein, The first side is provided with one magnetic attraction part, the second side is provided with two magnetic attraction parts, the magnetic attraction parts are long strips arranged vertically, the magnetic attraction parts longitudinally penetrate the base, and the shape of the electromagnetic suction plates matches that of the magnetic attraction parts.

3. The laser head protection mechanism of claim 1, wherein, The fall-preventing device comprises a plurality of tension springs, both ends of the tension springs are fixed to the base and the movable seat respectively through fasteners.

4. The laser head protection mechanism of claim 3, wherein, The fall-preventing device has four tension springs, the fasteners are bolts, and the upper ends of the base and the movable seat are provided with threaded holes to install the bolts.

5. The laser head protection mechanism of claim 1, wherein, The load-bearing component is a pin fixed to the movable seat and abutting against the upper end surface of the base, and the first connecting surface and the second connecting surface are arranged with at least one load-bearing component.

6. The laser head protection mechanism of claim 1, wherein, The base is provided with a detection terminal, after assembly of the base and the movable seat, the detection end of the deviation sensor is aligned with the detection terminal.

7. The laser head protection mechanism of claim 6, wherein, The movable seat is connected with two deviation sensors to correspond to the first connecting surface and the second connecting surface, the movable seat is provided with a protection hole, and the detection end of the deviation sensor is located in the protection hole.

8. The laser head protection mechanism of claim 6, wherein, The movable seat is provided with an electricity connection terminal, the electricity connection terminal is electrically connected with the deviation sensor and the laser head, and the electromagnetic suction plates are electrically connected with the laser head.

9. The laser head protection mechanism of claim 1, wherein, The base is provided with a positioning ball head, the movable seat is provided with a spherical groove matched with the positioning ball head, and the positioning ball head is arranged on the first side or the second side.

10. Laser cutting machine, characterized in that, The utility model relates to a laser head protection mechanism, comprising: a base fixedly connected with a mechanical arm, the base being provided with a first side and a second side forming an included angle between the first side and the second side, the first side and the second side being provided with magnetic attraction parts; a movable seat fixedly connected with a laser head, the movable seat being provided with a first connecting surface and a second connecting surface, the first connecting surface and the second connecting surface being provided with electromagnetic suction plates, after assembly, the first connecting surface is attached to the first side, the second connecting surface is attached to the second side, and the electromagnetic suction plates attract the magnetic attraction parts in the electrified state; wherein a fall-preventing device is arranged between the movable seat and the base to prevent the movable seat and the laser head from falling, the movable seat is provided with a load-bearing component and a deviation sensor, the load-bearing component is connected to the base to bear the weight of the movable seat and the laser head, the deviation sensor is used to detect the deviation value between the movable seat and the base, and the deviation sensor is electrically connected with the electromagnetic suction plates. The first side is provided with one magnetic attraction part, the second side is provided with two magnetic attraction parts, the magnetic attraction parts are long strips arranged vertically, the magnetic attraction parts longitudinally penetrate the base, and the shape of the electromagnetic suction plates matches that of the magnetic attraction parts. The fall-preventing device comprises a plurality of tension springs, both ends of the tension springs are fixed to the base and the movable seat respectively through fasteners. The fall-preventing device has four tension springs, the fasteners are bolts, and the upper ends of the base and the movable seat are provided with threaded holes to install the bolts. The load-bearing component is a pin fixed to the movable seat and abutting against the upper end surface of the base, and the first connecting surface and the second connecting surface are arranged with at least one load-bearing component. The base is provided with a detection terminal, after assembly of the base and the movable seat, the detection end of the deviation sensor is aligned with the detection terminal. The movable seat is connected with two deviation sensors to correspond to the first connecting surface and the second connecting surface, the movable seat is provided with a protection hole, and the detection end of the deviation sensor is located in the protection hole. The movable seat is provided with an electricity connection terminal, the electricity connection terminal is electrically connected with the deviation sensor and the laser head, and the electromagnetic suction plates are electrically connected with the laser head. The base is provided with a positioning ball head, the movable seat is provided with a spherical groove matched with the positioning ball head, and the positioning ball head is arranged on the first side or the second side. The utility model relates to a laser head protection mechanism, comprising: a base fixedly connected with a mechanical arm, the base being provided with a first side and a second side forming an included angle between the first side and the second side, the first side and the second side being provided with magnetic attraction parts; a movable seat fixedly connected with a laser head, the movable seat being provided with a first connecting surface and a second connecting surface, the first connecting surface and the second connecting surface being provided with electromagnetic suction plates, after assembly, the first connecting surface is attached to the first side, the second connecting surface is attached to the second side, and the electromagnetic suction plates attract the magnetic attraction parts in the electrified state; wherein a fall-preventing device is arranged between the movable seat and the base to prevent the movable seat and the laser head from falling, the movable seat is provided with a load-bearing component and a deviation sensor, the load-bearing component is connected to the base to bear the weight of the movable seat and the laser head, the deviation sensor is used to detect the deviation value between the movable seat and the base, and the deviation sensor is electrically connected with the electromagnetic suction plates.

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