Quick positioning fixture and laser engraving device

Abstract

The utility model discloses a quick positioning fixture and laser engraving device relates to laser engraving machine technical field, including work table, laser engraving device ontology and engraving plate, the symmetrical setting of clamp plate has a number of accurate positioning components, and accurate positioning components include the shell, and the middle part fixed connection of shell inner chamber has connecting rod, and the outer surface of shell inner chamber and connecting rod are slidably connected with the limit block in common, and the side fixed connection of connecting rod away from limit block has electromagnet, and the side fixed connection of limit block close to electromagnet has magnet. The utility model discloses through the slider no.

Description

Technical Field

[0001] This utility model relates to the field of laser engraving machine technology, specifically to a rapid positioning fixture and a laser engraving device. Background Technology

[0002] Laser engraving is an advanced manufacturing technology based on CNC technology and using laser as the processing medium. This technology uses a laser beam to irradiate the surface of the material, causing the material to undergo physical changes such as melting and vaporization in an instant, thereby achieving the purpose of engraving, cutting, or marking. Laser engraving technology has the characteristics of high precision, high efficiency, non-contact processing, and wide applicability. It can be applied to the processing of various materials such as wood products, acrylic, plastic sheets, metal sheets, and stone. Among them, dot matrix engraving is a common form of laser engraving. By swinging the laser head left and right and moving it up and down, a series of lines composed of dots are engraved, which ultimately form a complete image or text. The text or pattern engraved by this technology has no scratches, the surface of the object remains smooth, and the text will not wear off.

[0003] In laser engraving, the fixture, as the core tool for fixing the engraving plate, directly affects the processing accuracy and efficiency. Although existing fixture designs can achieve rapid clamping and positioning of the engraving plate, they still face significant limitations in practical applications. After changing the engraving plate, it is necessary to re-clamp and reposition it, which not only increases the complexity of the operation but may also reduce processing efficiency. More importantly, the accuracy and positioning method of the fixture are directly related to the magnitude of processing errors. Due to factors such as wear and deformation during design, manufacturing, or use, the engraving plate after re-clamping and positioning often cannot maintain the consistency with the initial positioning, resulting in processing quality problems such as pattern offset and uneven edges, and may increase the difficulty and cost of subsequent processing. In addition, if the accuracy and stability of the fixture are insufficient, it will directly affect the accuracy and stability of laser engraving, thereby adversely affecting the processing quality and production efficiency of the product.

[0004] Chinese patent document CN210254720U discloses a pneumatic positioning and centering fixture for a laser engraving equipment, including a positioning seat, a coarse positioning pin disposed on the positioning seat and corresponding to the workpiece positioning hole, a fine positioning mechanism disposed on the positioning seat and corresponding to the workpiece center hole, and a side positioning mechanism disposed on the side of the positioning seat and corresponding to the side of the workpiece; however, the following defects still exist in the implementation process:

[0005] Although the device described in the above literature can quickly, efficiently and accurately achieve center positioning and side clamping of the workpiece, greatly improving the positioning and clamping efficiency of the workpiece, the device in the above literature needs to be re-clamped and positioned after the engraving plate is replaced. This not only increases the complexity of operation, but may also reduce the processing efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a rapid positioning fixture and a laser engraving device to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] The quick positioning fixture includes a worktable, a laser engraving device body, and an engraving plate. A lifting assembly is fixedly connected to the middle of the upper part of the worktable. The upper part of the lifting assembly is fixedly connected to the lower part of the laser engraving device body. A clamping assembly is fixedly connected to one side of the upper part of the worktable. The clamping assembly includes a connecting seat. The connecting seat has symmetrically opened slide grooves. Several sliders are slidably connected to the inner cavity of each slide groove. The upper ends of the sliders are symmetrically fixedly connected to a clamping plate. Several precision positioning components are symmetrically arranged on the clamping plate. The precision positioning component includes a shell. A connecting rod is fixedly connected to the middle of the inner cavity of the shell. A limit block is slidably connected to the inner cavity of the shell and the outer surface of the connecting rod. An electromagnet is fixedly connected to the side of the connecting rod away from the limit block. A magnet is fixedly connected to the side of the limit block near the electromagnet. A spring is fixedly connected to the opposite surfaces of the magnet and the electromagnet. A pushing assembly is provided on one side of the connecting seat. The pushing assembly is used to push the engraving plate to move.

[0009] Using the above technical solution, the lifting component drives the laser engraving device body to rise and fall, allowing the laser engraving device body to engrave on plates of different thicknesses. The slider two drives the two clamping plates to move, thereby clamping and fixing plates of different sizes. The two clamping plates are used for coarse positioning of the plate. The spring force drives the spring to extend, which pushes the limiting block to slide in the inner cavity of the outer shell. The limiting block is used to position the plate between the two clamping plates, thereby enabling precise positioning of the plate using several fine positioning components.

[0010] A further improvement of the present invention is that the clamping assembly includes a guide rod and a bidirectional threaded rod. The guide rod on the same side is slidably connected to two sliders, and the bidirectional threaded rod on the same side is threadedly connected to two sliders. A support block is rotatably connected to one side of the bidirectional threaded rod. The lower end of the support block is fixedly connected to the upper end of the worktable. A motor is fixedly connected to the side of the support block away from the connecting seat, and the motor output shaft is fixedly connected to the bidirectional threaded rod. The connecting seat is rotatably connected to the bidirectional threaded rod, and the connecting seat is fixedly connected to the guide rod.

[0011] In the above technical solution, since the bidirectional threaded rod is fixedly connected to the motor output shaft, the motor can drive the bidirectional threaded rod to rotate. Then, the bidirectional threaded rod is threadedly connected to two sliders. When the bidirectional threaded rod rotates, it can drive the two sliders to move, and then drive the two clamping plates to move, so that the two clamping plates can limit the engraving plates of different sizes.

[0012] A further improvement of the present invention is that the pushing component includes a second support plate, the second support plate is fixedly connected to the connecting seat, an electric push rod is fixedly connected to the upper part of the second support plate, and a docking plate is fixedly connected to the side of the electric push rod near the connecting seat.

[0013] In the above technical solution, the support plate is fixedly connected to the connecting seat, and then the connecting seat is fixedly connected to the electric push rod. The connecting seat can support and connect the electric push rod. A docking plate is fixedly connected to the side of the electric push rod telescopic rod near the connecting seat. The docking plate can contact the carving plate placed on the two clamps, and then the electric push rod can be used to push the carving plate to move, which facilitates the replacement of the carved plate after it has been carved.

[0014] A further improvement of the present invention is that the lifting assembly includes a support column, the lower end of which is fixedly connected to the upper end of the worktable, an operating disc is rotatably connected to the upper part of the support column, a screw is fixedly connected to the lower end of the operating disc, a slider is threadedly connected to the outer surface of the screw, the slider is slidably connected to the support column, a support plate is fixedly connected to one side of the slider, the support plate is slidably connected to the support column, and the upper end of the support plate is fixedly connected to the lower end of the laser engraving device body.

[0015] Using the above technical solution, rotating the operating disc drives the screw to rotate. Since the screw is threadedly connected to the slider, rotating the screw causes the slider to rise and fall. As the slider rises and falls, it causes the support plate to rise and fall. Since the upper end of the support plate is fixedly connected to the lower end of the laser engraving device body, the laser engraving device body rises and falls as the support plate rises and falls. The position and height of the laser engraving device body can then be adjusted according to the thickness of the engraving plate.

[0016] A further improvement to the technical solution of this utility model is that the engraving plate is symmetrically provided with several positioning grooves.

[0017] By adopting the above technical solution, several positioning grooves are symmetrically opened on the engraving plate, so that the positioning grooves can cooperate with the adjacent limiting blocks to quickly fix and position the engraving plate.

[0018] A further improvement of this utility model is that the limiting block is made of rubber material.

[0019] Using the above technical solution, when the spring pushes the limiting block to slide in the inner cavity of the outer shell, and the limiting block contacts the inner cavity of the positioning groove, the limiting block is made of rubber material, which has elasticity and flexibility, and can reduce the occurrence of scratches and other problems caused by the collision of the limiting block with the engraving plate.

[0020] A further improvement to the technical solution of this utility model is that the second slider is I-shaped.

[0021] By adopting the above technical solution, the second slider is set to an I-shape, which can reduce the friction during its movement and improve the movement accuracy.

[0022] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0023] 1. This utility model uses a lifting component to drive the laser engraving device body to rise and fall, allowing the laser engraving device body to engrave on plates of different thicknesses. A slider can move two clamping plates, which can then hold and fix plates of different sizes, providing coarse positioning. A spring's elasticity extends, pushing a limiting block to slide within the outer cavity, positioning the plate between the two clamping plates. Several fine positioning components then provide precise positioning of the plate, reducing operational complexity and improving processing efficiency.

[0024] 2. This utility model allows the operation of a control panel to rotate, which in turn drives a screw to rotate. Since the screw is threadedly connected to a slider, the rotation of the screw causes the slider to rise and fall. As the slider rises and falls, it in turn causes the support plate to rise and fall. Because the upper end of the support plate is fixedly connected to the lower end of the laser engraving device body, the rise and fall of the support plate causes the laser engraving device body to rise and fall. This allows the height of the laser engraving device body to be adjusted according to the thickness of the engraving plate, making the device suitable for engraving plates of different thicknesses and improving its practicality and versatility. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the clamping assembly of this utility model. Figure 1 ;

[0029] Figure 4 This is a schematic diagram of the clamping assembly of this utility model. Figure 2 ;

[0030] Figure 5This is a schematic diagram of the precision positioning component of this utility model;

[0031] Figure 6 This is a schematic diagram of the pushing component of this utility model;

[0032] Figure 7 This is a schematic diagram of the lifting component of this utility model;

[0033] Figure 8 This is a schematic diagram of the engraving of this utility model.

[0034] In the diagram: 1. Workbench; 2. Lifting assembly; 21. Support column; 22. Screw; 23. Control panel; 24. Slider one; 25. Support plate one; 3. Laser engraving device body; 4. Clamping assembly; 41. Connecting seat; 42. Slide groove; 43. Slider two; 44. Guide rod; 45. Support block; 46. Motor; 47. Bidirectional threaded rod; 5. Clamping plate; 6. Precision positioning assembly; 61. Housing; 62. Connecting rod; 63. Limiting block; 64. Spring; 65. Electromagnet; 66. Magnet; 7. Engraving plate; 71. Positioning groove; 8. Pushing assembly; 81. Support plate two; 82. Electric push rod; 83. Connecting plate. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to embodiments:

[0036] Example 1

[0037] like Figure 1 - Figure 5 As shown, this utility model provides a quick positioning fixture, including a worktable 1, a laser engraving device body 3, and an engraving plate 7; a lifting assembly 2 is fixedly connected to the upper middle part of the worktable 1, and the upper part of the lifting assembly 2 is fixedly connected to the lower end of the laser engraving device body 3; a clamping assembly 4 is fixedly connected to one side of the upper end of the worktable 1, the clamping assembly 4 includes a connecting seat 41, the connecting seat 41 is symmetrically provided with sliding grooves 42, and a plurality of sliders 43 are slidably connected to the inner cavity of each sliding groove 42; the upper ends of the plurality of sliders 43 are symmetrically fixedly connected with clamping plates 5, and the clamping plates 5 are symmetrically provided with... The device is equipped with several precision positioning components 6. Each precision positioning component 6 includes a housing 61. A connecting rod 62 is fixedly connected to the center of the inner cavity of the housing 61. A limit block 63 is slidably connected to the inner cavity of the housing 61 and the outer surface of the connecting rod 62. An electromagnet 65 is fixedly connected to the side of the connecting rod 62 away from the limit block 63. A magnet 66 is fixedly connected to the side of the limit block 63 close to the electromagnet 65. A spring 64 is fixedly connected to the opposite surfaces of the magnet 66 and the electromagnet 65. A pushing component 8 is provided on one side of the connecting seat 41. The pushing component 8 is used to push the engraving plate 7 to move.

[0038] In this embodiment, the lifting component 2 can drive the laser engraving device body 3 to rise and fall, thereby allowing the laser engraving device body 3 to adjust its position and height according to the engraving plate 7 of different thicknesses. The laser engraving device body 3 can perform laser engraving on the engraving plate 7. The two clamping plates 5 can limit the position of the engraving plate 7 and perform coarse positioning on the engraving plate 7. The elastic force of the spring 64 drives the spring 64 to extend, and then pushes the limiting block 63 to slide in the inner cavity of the outer shell 61. The limiting block 63 can be used to position the engraving plate 7 between the two clamping plates 5, thereby enabling the engraving plate 7 to be accurately positioned using several fine positioning components 6.

[0039] Example 2

[0040] like Figure 8 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the clamping assembly 4 includes a guide rod 44 and a bidirectional threaded rod 47. The guide rod 44 on the same side is slidably connected to two sliders 43, and the bidirectional threaded rod 47 on the same side is threadedly connected to the two sliders 43. A support block 45 is rotatably connected to one side of the bidirectional threaded rod 47. The lower end of the support block 45 is fixedly connected to the upper end of the worktable 1. A motor 46 is fixedly connected to the side of the support block 45 away from the connecting seat 41, and the output shaft of the motor 46 is fixedly connected to the bidirectional threaded rod 47. The connecting seat 41 is rotatably connected to the bidirectional threaded rod 47 and fixedly connected to the guide rod 44. The engraving plate 7 is symmetrically provided with several positioning grooves 71. The limiting block 63 is made of rubber material, and the sliders 43 are I-shaped.

[0041] In this embodiment, when rapid positioning and clamping of the engraving plate 7 is required, the operator first places the engraving plate 7 between two clamping plates 5. Then, the controller controls the motor 46 to run, using the output shaft of the motor 46 to drive the bidirectional threaded rod 47 to rotate. As the bidirectional threaded rod 47 rotates, it drives the two sliders 43 to move towards their opposite faces. As the two sliders 43 move, they drive the two clamping plates 5 towards the engraving plate 7, thus allowing the two clamping plates 5 to define the position of the engraving plate 7 and to perform coarse positioning and correction as the two clamping plates 5 move. Once the inner walls of the two clamping plates 5 contact the side walls of the engraving plate 7, the controller stops the motor 46. This process... During the process, two clamping plates 5 are used to roughly position and limit the engraving plate 7. At this time, the engraving plate 7 can also slide between the two clamping plates 5. Then, the engraving plate 7 is slid between the two clamping plates 5 towards the side closer to the laser engraving device body 3. When the engraving plate 7 slides, it will apply a force to the limiting block 63, causing the limiting block 63 to move towards the electromagnet 65. Then, the limiting block 63 will apply a force to the spring 64, causing the spring 64 to contract. When the limiting block 63 contacts the inner cavity of the positioning groove 71, under the elastic force of the spring 64, it will cause the spring 64 to extend, and then push the limiting block 63 to slide towards the positioning groove 71. Thus, through the cooperation of the limiting block 63 and the positioning groove 71, the position of the engraving plate 7 can be positioned and fixed.

[0042] Example 3

[0043] like Figure 7 As shown, based on Embodiment 2, this utility model provides a technical solution: Preferably, the lifting assembly 2 includes a support column 21, the lower end of the support column 21 is fixedly connected to the upper end of the worktable 1, an operation disk 23 is rotatably connected to the upper part of the support column 21, a screw 22 is fixedly connected to the lower end of the operation disk 23, a slider 24 is threadedly connected to the outer surface of the screw 22, the slider 24 is slidably connected to the support column 21, a support plate 25 is fixedly connected to one side of the slider 24, the support plate 25 is slidably connected to the support column 21, and the upper end of the support plate 25 is fixedly connected to the lower end of the laser engraving device body 3.

[0044] In this embodiment, the operator then rotates the operating disk 23, which in turn rotates the screw 22. Since the screw 22 and the slider 24 are threadedly connected, when the screw 22 rotates, it causes the slider 24 to slide downward within the cavity of the support column 21. Since the slider 24 is fixedly connected to the support plate 25, the support plate 25 slides downward along with the slider 24. Then, the support plate 25 causes the laser engraving device body 3 to slide downward, thus facilitating the adjustment of the position and height of the laser engraving device body 3 according to the thickness of the engraving plate 7. After the position and height of the laser engraving device body 3 are adjusted, the laser engraving device body 3 is controlled by the program to perform laser engraving on the engraving plate 7.

[0045] Example 4

[0046] like Figure 6 As shown, based on Embodiment 3, this utility model provides a technical solution: preferably, the pushing component 8 includes a second support plate 81, the second support plate 81 is fixedly connected to the connecting seat 41, an electric push rod 82 is fixedly connected to the upper part of the second support plate 81, and a docking plate 83 is fixedly connected to the side of the electric push rod 82 near the connecting seat 41.

[0047] In this embodiment, when the laser engraving device body 3 is laser engraving the engraving plate 7, the operator can place the new engraving plate 7 between the two clamping plates 5. After the old engraving plate 7 is engraved, the controller controls the electromagnet 65 to be energized. The energized electromagnet 65 generates a magnetic force, which attracts the magnet 66 to move towards the electromagnet 65. Then, when the magnet 66 moves, it will drive the limiting block 63 to move away from the positioning groove 71. Then, the limiting block 63 will disengage from the inner cavity of the positioning groove 71, and the position of the engraving plate 7 will be released. Then, the controller controls the electric push rod 82 to run, and the extension of the electric push rod 82 will be used to... The retracting rod pushes the docking plate 83 to move towards the engraving plate 7, and then the docking plate 83 pushes the new engraving plate 7 towards the old engraving plate 7. Then the old engraving plate 7 is pushed away from directly under the laser engraving device body 3. When the old engraving plate 7 is pushed away, the controller controls the electromagnet 65 to be de-energized. Then, under the elastic force of the spring 64, the magnet 66 and the limiting block 63 will be reset. Then, when the new engraving plate 7 slides towards one side of the laser engraving device body 3, the above steps will be repeated. The position of the new engraving plate 7 is positioned and fixed by the cooperation of the limiting block 63 and the positioning groove 71. Then the laser engraving device body 3 is used to engrave it.

[0048] The working principle of this rapid positioning fixture and laser engraving device is explained in detail below.

[0049] like Figure 1 -Figure 8 As shown, when quick positioning and clamping of the engraving plate 7 is required, the operator first places the engraving plate 7 between two clamping plates 5. Then, the controller controls the motor 46 to run, and the output shaft of the motor 46 drives the bidirectional threaded rod 47 to rotate. When the bidirectional threaded rod 47 rotates, it drives the two sliders 43 to move towards their opposite faces. When the two sliders 43 move, they drive the two clamping plates 5 to move towards the engraving plate 7. Thus, the two clamping plates 5 can be used to limit the position of the engraving plate 7, and the position of the engraving plate 7 can be corrected and coarsely positioned when the two clamping plates 5 move. When the inner wall of the two clamping plates 5 contacts the side wall of the engraving plate 7, the controller controls the motor 46 to stop moving. The engraving plate 7 is roughly positioned and limited by two clamping plates 5. At this time, the engraving plate 7 can also slide between the two clamping plates 5. Then, the engraving plate 7 is slid between the two clamping plates 5 towards the side closer to the laser engraving device body 3. When the engraving plate 7 slides, it will apply a force to the limiting block 63, causing the limiting block 63 to move towards the electromagnet 65. Then, the limiting block 63 will apply a force to the spring 64, causing the spring 64 to contract. When the limiting block 63 contacts the inner cavity of the positioning groove 71, under the elastic force of the spring 64, it will cause the spring 64 to extend, and then push the limiting block 63 to slide towards the positioning groove 71. Thus, through the cooperation of the limiting block 63 and the positioning groove 71, the position of the engraving plate 7 can be positioned and fixed.

[0050] Next, the operator rotates the control panel 23, which in turn rotates the screw 22. Since the screw 22 and the slider 24 are threadedly connected, when the screw 22 rotates, it will cause the slider 24 to slide downward in the inner cavity of the support column 21. Since the slider 24 is fixedly connected to the support plate 25, the support plate 25 will slide downward together when the slider 24 slides downward. Then, the support plate 25 can drive the laser engraving device body 3 to slide downward, so that the laser engraving device body 3 can be adjusted in position and height according to the thickness of the engraving plate 7. After the position and height of the laser engraving device body 3 is adjusted, the laser engraving device body 3 is controlled by the program to run, and laser engraving can be performed on the engraving plate 7 using the laser engraving device body 3.

[0051] When the laser engraving device body 3 is laser engraving the engraving plate 7, the operator can place the new engraving plate 7 between the two clamping plates 5. After the old engraving plate 7 is engraved, the controller controls the electromagnet 65 to be energized. The energized electromagnet 65 generates a magnetic force, which attracts the magnet 66 to move in the direction of the electromagnet 65. Then, when the magnet 66 moves, it will drive the limiting block 63 to move away from the positioning groove 71. Then, the limiting block 63 will disengage from the inner cavity of the positioning groove 71, and the position fixation of the engraving plate 7 will be released. Then, the controller controls the electric push rod 82 to run, and the extension rod of the electric push rod 82 pushes... The docking plate 83 moves toward the engraving plate 7, and then the docking plate 83 pushes the new engraving plate 7 toward the old engraving plate 7. Then the old engraving plate 7 is pushed away from directly below the laser engraving device body 3. When the old engraving plate 7 is pushed away, the controller controls the electromagnet 65 to be de-energized. Then, under the elastic force of the spring 64, the magnet 66 and the limiting block 63 will be reset. Then, when the new engraving plate 7 slides toward one side of the laser engraving device body 3, the above steps will be repeated. The position of the new engraving plate 7 is positioned and fixed by the cooperation of the limiting block 63 and the positioning groove 71. Then the laser engraving device body 3 is used to engrave it.

[0052] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A quick positioning fixture, comprising a worktable (1), a laser engraving device body (3), and an engraving plate (7); characterized in that: A lifting assembly (2) is fixedly connected to the upper middle part of the worktable (1). The upper part of the lifting assembly (2) is fixedly connected to the lower end of the laser engraving device body (3). A clamping assembly (4) is fixedly connected to one side of the upper end of the worktable (1). The clamping assembly (4) includes a connecting seat (41). The connecting seat (41) is symmetrically provided with a sliding groove (42). Several sliders (43) are slidably connected to the inner cavity of the sliding groove (42). The upper ends of several sliders (43) are symmetrically fixedly connected with a clamping plate (5). Several precision positioning components (6) are symmetrically arranged on the clamping plate (5). The precision positioning components (6) include an outer... The shell (61) has a connecting rod (62) fixedly connected to the middle of its inner cavity. The inner cavity of the shell (61) and the outer surface of the connecting rod (62) are slidably connected to a limiting block (63). An electromagnet (65) is fixedly connected to the side of the connecting rod (62) away from the limiting block (63). A magnet (66) is fixedly connected to the side of the limiting block (63) close to the electromagnet (65). A spring (64) is fixedly connected to the opposite side of the magnet (66) and the electromagnet (65). A pushing component (8) is provided on one side of the connecting seat (41). The pushing component (8) is used to push the engraving plate (7) to move.

2. The quick positioning fixture according to claim 1, characterized in that: The clamping assembly (4) includes a guide rod (44) and a bidirectional threaded rod (47). The guide rod (44) on the same side is slidably connected to two sliders (43), and the bidirectional threaded rod (47) on the same side is threadedly connected to two sliders (43). A support block (45) is rotatably connected to one side of the bidirectional threaded rod (47). The lower end of the support block (45) is fixedly connected to the upper end of the worktable (1). A motor (46) is fixedly connected to the side of the support block (45) away from the connecting seat (41), and the output shaft of the motor (46) is fixedly connected to the bidirectional threaded rod (47). The connecting seat (41) is rotatably connected to the bidirectional threaded rod (47), and the connecting seat (41) is fixedly connected to the guide rod (44).

3. The quick positioning fixture according to claim 1, characterized in that: The pushing component (8) includes a second support plate (81), which is fixedly connected to the connecting seat (41). An electric push rod (82) is fixedly connected to the upper part of the second support plate (81), and a docking plate (83) is fixedly connected to the side of the electric push rod (82) near the connecting seat (41).

4. The quick positioning fixture according to claim 1, characterized in that: The lifting assembly (2) includes a support column (21), the lower end of which is fixedly connected to the upper end of the worktable (1). An operating disk (23) is rotatably connected to the upper part of the support column (21). A screw (22) is fixedly connected to the lower end of the operating disk (23). A slider (24) is threadedly connected to the outer surface of the screw (22). The slider (24) is slidably connected to the support column (21). A support plate (25) is fixedly connected to one side of the slider (24). The support plate (25) is slidably connected to the support column (21). The upper end of the support plate (25) is fixedly connected to the lower end of the laser engraving device body (3).

5. The quick positioning fixture according to claim 1, characterized in that: The engraving plate (7) is symmetrically provided with several positioning grooves (71).

6. The quick positioning fixture according to claim 1, characterized in that: The limiting block (63) is made of rubber material.

7. The quick positioning fixture according to claim 1, characterized in that: The second slider (43) is I-shaped.

8. A laser engraving device, characterized in that: The quick positioning fixture described in any one of claims 1-7 is applicable.

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