A precision screw laser engraving marking positioning device

Abstract

The present application relates to screw machining positioning technical field, specifically, a kind of precision screw laser engraving marking positioning device.More specifically, a kind of precision screw laser engraving marking positioning device is provided, including mainframe cabinet, lifting stand and laser marking head, the mainframe cabinet of laser marking head is directly below and is provided with protractor on it, the protractor is opened with several supporting grooves in the form of array on outer circumferential surface, the supporting groove is used to accommodate and position the screw to be marked, and supporting groove corresponds with laser marking head, each supporting groove inner cavity is attached with the supporting piece for supporting the screw to be marked, and the supporting piece has support portion for carrying screw bottom, and traction portion located on both sides of support portion and extending towards outside;The supporting cavity is not only used to provide axial support for screw head, and when protractor station switches, supporting piece support portion is retracted to form radial constraint to screw shank, so as to overcome the tendency of spinning centrifugal force to screw, guarantee the stability of conveying process.

Description

Technical Field

[0001] This invention relates to the field of screw processing and positioning technology, and more specifically, to a precision screw laser engraving and marking positioning device. Background Technology

[0002] Screws, as a standardized hardware fastener, come in a wide variety of specifications, covering a large range of diameters and head shapes, from M1 to M10. In current rotary laser marking processes, the support grooves on the edge of the indexing plate (i.e., the slots used to accommodate screws) are mostly rigid structures with fixed dimensions.

[0003] In current rotary laser marking processes, the support grooves (i.e., the slots for accommodating screws) on the edge of the indexing plate are mostly rigid structures with fixed dimensions. In actual production, to ensure the smooth insertion of large-sized, large-diameter screws, the opening size and inner diameter of these support grooves are often preset to be relatively wide during the design phase.

[0004] However, this fixed-size slot design introduces significant limitations in applicability. When machining miniature screws with small head sizes, a noticeable circumferential gap forms between the screw's outer diameter and the slot width, as the screw's outer diameter is much smaller. In this situation, the support groove cannot effectively limit the bottom and constrain the screw head radially, meaning the screw is prone to skewing and wobbling under gravity or micro-vibrations from the indexing plate's operation. It is difficult to achieve precise and stable positioning of small screws while maintaining compatibility with large-size specifications. Summary of the Invention

[0005] To achieve the above objectives, a precision screw laser engraving and marking positioning device includes a main cabinet, a lifting frame, and a laser marking head that can move vertically on the lifting frame. A dividing plate is provided on the main cabinet directly below the laser marking head. The dividing plate has several support grooves arranged in an array along its outer circumference. The support grooves are used to accommodate and position the screws to be marked, and the support grooves correspond to the laser marking head. Each support groove has a support piece attached to its inner cavity for supporting the screws to be marked. The support piece has a support portion for supporting the bottom of the screw, and traction portions located on both sides of the support portion and extending outward. The indexing plate is also equipped with a toggle mechanism and a traction mechanism. The traction part of the support plate is hooked around the toggle mechanism. The traction part and the toggle mechanism are connected to the traction mechanism set inside the indexing plate. When the traction mechanism applies traction force to the traction parts on both sides, the traction mechanism is used to drive the traction parts on both sides to move away from each other, forcing the two ends of the support part to transition and retract towards the traction part along the toggle mechanism. The actuating mechanism can detach the support from the inner cavity of the support groove by rotating, so that the support and the inner cavity of the support groove form a tight embrace with the opening retracted, thereby providing top support and circumferential wrapping for the screw to be marked.

[0006] The traction mechanism includes an expansion plate arranged in a radially perpendicular direction along the indexing plate. A first chamber is provided inside the indexing plate. The expansion plate is slidably disposed in the first chamber. One end of the expansion plate is fixedly connected to the traction part of the support plate, and the other end extends and abuts against the push plate. The expansion plate is provided with a slider that is slidably connected to the first chamber, and the movement direction of the expansion plates on both sides is perpendicular to the radial movement direction of the push plate.

[0007] The push plate is tapered at one end near the expansion plate, and a slope is provided at the contact point between the push plate and the expansion plate. A push rod is fixedly connected to the other end of the push plate. A drive plate is provided at the center of the indexing plate, and several protrusions are provided on the outer edge of the drive plate. The far end of the push rod abuts against the recess formed between two adjacent protrusions. A return spring is fitted on the top rod. The return spring is located in the second cavity formed within the indexing plate. One end of the return spring is fixed to the inner wall of the second cavity, and the other end is fixed to the push plate. Furthermore, a compression spring is elastically connected between the expansion plate and the inner wall of the first cavity.

[0008] The actuating mechanism is a paddle block located at the connection between the support plate traction part and the support part. The paddle block is in the shape of an eccentrically driven cam block, which has a driving surface for supporting the support plate traction part and an eccentric arc surface for peeling the support plate support part from the inner wall of the support groove and forcing it to bend and shrink inward.

[0009] The drive surface of the dial is coaxially connected to a rotating shaft, which passes through the indexing plate and is rotatably connected to the indexing plate. The rotating shaft is covered with a top cover, which is fixedly located on the surface of the indexing plate. A torsion spring is sleeved on the rotating shaft, with one end of the torsion spring fixedly connected to the rotating shaft and the other end fixedly connected to the top cover.

[0010] A slot is provided on the lever block, and a column is arranged coaxially with the rotating shaft in the slot. Both ends of the column are fixedly connected to the inner wall of the slot. Several traction ropes are wound around the shaft of the column, wherein one end of the traction rope is fixed to the column and the other end extends to be fixed to the expansion plate.

[0011] A third chamber is provided inside the indexing plate, between the two expansion plates. The third chamber is connected to the inner cavity of the support groove, and the axis of the third chamber is perpendicular to the tangent of the corresponding support plate support. A tension spring is elastically fixedly connected between the third chamber and the support plate support. An auxiliary rod is coaxially sleeved inside the tension spring. One end of the auxiliary rod is fixedly connected to the support plate support, and the other end slides through the third chamber of the indexing plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In this precision screw laser engraving and positioning device, during the transition from the support section to the traction section, the support plate, in conjunction with the rotating action of the lever, forces the support plate to peel off from the inner wall of the support groove, forming a bent and retracted state. This creates a support cavity that matches the size of the screw head to be processed. This support cavity not only provides axial support for the screw head but also, during indexing position switching, the retraction of the support plate creates radial constraint on the screw stalk, thereby overcoming the tendency of centrifugal force to throw the screw out and ensuring the stability of the conveying process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the indexing plate and 111 in this invention; Figure 3 This is a schematic diagram of the support groove of the present invention; Figure 4 This is a schematic diagram of the interior of the indexing plate of the present invention; Figure 5 This is a schematic diagram of the exploded structure of the drive disc and push rod of the present invention; Figure 6 This is a schematic diagram illustrating the principle of lateral movement of the expansion plate in this invention; Figure 7 This is a schematic diagram illustrating the transition principle from the support portion to the traction portion of the present invention. Figure 8 This is a schematic diagram of the rotating paddle of the present invention; Figure 9 For the present invention Figure 8 Enlarged diagram of point A in the diagram; Figure 10 This is a schematic diagram of the shrinkage deformation of the support piece in this invention.

[0014] 100. Main unit cabinet; 101. Lifting stand; 102. Laser marking head; 110. Indexing plate; 111. Rotary motor; 112. Support groove; 120. Support plate; 122. Auxiliary rod; 123. Tension spring; 130. Pulley; 131. Traction rope; 132. Column; 133. Shaft; 134. Top cover; 135. Torsion spring; 200. Traction mechanism; 210. Expansion plate; 220. Push plate; 221. Push rod; 222. Drive motor; 223. Drive disc; 224. Return spring; 225. Compression spring. Detailed Implementation

[0015] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0016] Therefore, in view of the above-mentioned problems, the present invention provides a precision screw laser engraving and positioning device, with reference to... Figure 1 , Figure 2 As shown, the system includes a main unit cabinet 100, a lifting frame 101, and a vertically movable laser marking head 102 mounted on the lifting frame 101. An indexing plate 110 is mounted on the main unit cabinet 100 directly below the laser marking head 102. Figure 3 In the process, the indexing plate 110 has several support grooves 112 arranged in an array along its outer circumference. The support grooves 112 are used to accommodate and position the screws to be marked, and the support grooves 112 correspond to the laser marking head 102. That is, before marking the screws, the marking surface (screw head) of the screws is kept facing upwards and the threaded area (that is, the screw shank) is facing downwards. The screws are then placed in the support grooves 112, so that the screw head rests on the support grooves 112. Then, the indexing plate 110 rotates to transport the corresponding screws to be marked in the support grooves 112 to the marking area one by one. The marking work is completed after the screws pass through the laser marking head 102.

[0017] When the indexing plate rotates 110 degrees, return to Figure 2 As shown, a rotary motor 111 is fixedly installed on the main unit cabinet 100. The output shaft of the rotary motor 111 is coaxially connected to the indexing plate 110. After the screw to be marked is placed in the support groove 112, the rotary motor 111 is started to drive the indexing plate 110 and several screws to be marked to rotate, so that the screws to be marked pass through the marking area one by one for marking. After all the screws to be marked are marked, they are taken out from the support groove 112 and the next round of marking work is carried out.

[0018] exist Figure 3In order to ensure that the screw to be marked can be smoothly placed into the support groove 112 for marking, the inner diameter of the U-shaped cavity formed inside the support groove 112 is larger than the outer diameter of the screw. The advantage is that the screw can be accommodated without interference within the U-shaped support groove 112, and there is a gap between the support groove 112 and the outer diameter of the screw; during marking, depending on the screw head type, this gap can accommodate subsequent... Figure 4 The support plate 120 in the middle is deformed and adjusted so that the support plate 120 can bear the corresponding screw head, thereby improving the adaptability of the device.

[0019] Secondly, return to Figure 2 As shown, to accommodate screws of different lengths to be marked, the indexing plate 110 in this embodiment is not directly mounted on the main unit cabinet 100. Specifically, the indexing plate 110 is suspended above the main unit cabinet 100 via a central rotary motor 111, such that the bottom surface of the indexing plate 110 is spaced apart from the top surface of the main unit cabinet 100; and a preset clearance space is formed between the bottom surface of the indexing plate 110 and the top surface of the main unit cabinet 100, which is used to accommodate the screw shank. In actual operation, the screw to be marked is placed in the support groove 112, and its longer shank can extend downward through the support groove 112 and directly into the clearance space; thus avoiding interference between the screw shank and the top surface of the main unit cabinet 100 below due to excessive length, ensuring that the equipment can process screws of various lengths.

[0020] Immediately afterwards, combined Figure 4 , Figure 6 As shown, each support groove 112 has a support piece 120 attached to its inner cavity to support the screw to be marked. The support piece 120 is attached to the inner wall of the support groove 112. The support piece 120 has a certain elastic sheet structure, such as an elastic metal sheet. The support piece 120 is divided into a support part for supporting the bottom of the screw and a traction part located on both sides of the support part and extending outward. The indexing plate 110 is also provided with a toggle mechanism and a traction mechanism 200. The traction part of the support piece 120 is hooked around the toggle mechanism. The traction part and the toggle mechanism are connected to the traction mechanism 200 located inside the indexing plate 110. When the traction mechanism 200 applies a traction force to the traction parts on both sides, the traction mechanism 200 drives the traction parts on both sides to move away from each other, forcing the two ends of the support part to transition and contract towards the traction part along the toggle mechanism, thereby narrowing the support area. At the same time, under the traction of the traction mechanism 200, the actuating mechanism rotates at a certain angle around the connection between it and the indexing plate 110. The actuating mechanism can separate the support part from the inner cavity of the support groove 112 by rotating, so that the support part and the inner cavity of the support groove 112 form a tight hugging state with the opening shrinking inward, thereby forming top support and circumferential wrapping of the screw to be marked.

[0021] First, during the transition from the support portion of the support plate 120 to the actuating mechanism, the actuating mechanism adjusts the support portion. The support portion bends inward through deformation and disengages from the inner cavity of the support groove 112, narrowing the support area so that the support portion can be adapted to the screw head of the corresponding size, thereby achieving the supporting function for that type of screw head. Specifically, the traction mechanism 200 includes an expansion plate 210 arranged in a radially vertical direction along the indexing plate 110. The expansion plates 210 are arranged symmetrically. Structurally, a first chamber is provided inside the indexing plate 110, and the expansion plates 210 are slidably disposed in the first chamber. One end of the expansion plate 210 is fixedly connected to the traction portion of the support plate 120, and the other end extends and abuts against the push plate 220.

[0022] To constrain the movement direction of the expansion plate 210, a slider is provided on the expansion plate 210 that is slidably connected to the first chamber. The cooperation between the slider and the first chamber is used to limit the movement direction of the expansion plate 210; ensuring that the movement direction of the expansion plates 210 on both sides is perpendicular to the radial movement direction of the push plate 220 (i.e., as shown in the figure). Figure 7 (The lateral force component direction indicated by the middle arrow) thereby converts the radial thrust of the push plate 220 into the expansion force on the expansion plate 210, providing lateral pulling power for the traction unit.

[0023] Furthermore, such as Figure 5 and Figure 6 As shown, the push plate 220 is tapered at one end near the expansion plate 210, and the push plate 220 and the expansion plate 210 have a slope at the contact point. The other end of the push plate 220 is fixedly connected to the push rod 221. A drive plate 223 is provided at the center of the indexing plate 110. Several protrusions are provided on the outer edge of the drive plate 223. The distal end of the push rod 221 abuts against the recess formed between two adjacent protrusions. That is, in the initial state, the distal end of the push rod 221 naturally abuts against the recess. At this time, the device maintains a supporting posture for screws of conventional size.

[0024] When the equipment needs to accommodate screws with smaller head sizes, the curvature of the support portion of the support plate 120 needs to be changed to shrink the inner cavity. At this time, the drive motor 222, which is fixed on the indexing plate 110 and coaxially connected to the drive plate 223, is used. As the drive plate 223 rotates, the distal end of the push rod 221 is forced to slide out from the recess of the drive plate 223 and climb onto the protrusion. This sliding process forces the push rod 221 to drive the push plate 220 to feed radially toward the center.

[0025] In this process, to ensure the movement and reset of the push plate 220, a reset spring 224 is fitted onto the push rod 221. The reset spring 224 is located in the second cavity formed within the indexing plate 110. One end of the reset spring 224 is fixed to the inner wall of the second cavity, and the other end is fixed to the push plate 220. Furthermore, a compression spring 225 is elastically connected between the expansion plate 210 and the inner wall of the first cavity (see reference). Figure 7 (As shown); In this way, when the push plate 220 is fed inward, the push rod 221 drives the push plate 220 to move radially to one side, which needs to overcome the elastic potential energy of the return spring 224 and the compression spring 225. First, the slope of the push plate 220 is attached to one end of the expansion plate 210, and the applied component force forces the expansion plates 210 on both sides to slide backward in a direction perpendicular to the radial direction. At the same time as the expansion plates 210 slide backward, a pulling force is applied to the traction part of the support plate 120. Under the action of this pulling force, the support part of the support plate 120, which was originally attached to the wall, is forced to detach from the inner cavity of the support groove 112. The support part of the support plate 120 undergoes elastic deformation and bends and shrinks inward, thereby adapting to support screw heads with smaller dimensions.

[0026] See again Figure 8 and Figure 9 As shown, in order to achieve the peeling and retraction of the support portion of the support piece 120, the actuation mechanism in this embodiment is specifically manifested as an eccentrically driven actuating block 130.

[0027] like Figure 8 As shown, the actuating mechanism is a lever 130 located at the connection between the traction part and the support part of the support piece 120. The lever 130 is eccentrically driven in the shape of a cam block, having two key surfaces: a driving surface for supporting the traction part of the support piece 120, and an eccentric arc surface for peeling the support part of the support piece 120 from the inner wall of the support groove 112 and forcing it to bend and retract. When the support part of the support piece 120 is against the inner wall of the support groove 112, the driving surface of the lever 130 is in contact with the connection between the traction part and the support part of the support piece 120, i.e., the transition point; when the lever 130 moves... Figure 8 When rotating in the direction of the center arrow, as the rotation amplitude increases, the eccentric arc surface of the lever 130 gradually contacts the support portion of the support piece 120 by utilizing the eccentric contour change of the lever 130. The eccentric arc surface generates an inward peeling force on the support portion. This peeling force forces the support portion, which was originally attached to the inner wall of the support groove 112, to detach from its constraint and forces the support portion to undergo inward elastic bending and shrinkage. The shrinkage of the support portion forms a support cavity that matches the size of the screw head to be processed, thereby reducing the support opening.

[0028] In other words, during the transition from the support section to the traction section, the support section of the support piece 120, in conjunction with the rotation of the lever 130, forces the support section of the support piece 120 to peel off from the inner wall of the support groove 112, forming a bent and retracted state, thereby creating a support cavity that matches the size of the screw head to be processed. This support cavity not only provides axial support for the screw head, but also, when the indexing plate 110 switches positions, the retraction of the support section of the support piece 120 creates radial constraint on the screw stalk, thereby overcoming the tendency of the centrifugal force to throw the screw out and ensuring the stability of the conveying process.

[0029] On the other hand, such as Figure 9 As shown, the dial block 130 is rotatably connected to the indexing plate 110 via a coaxially arranged rotating shaft 133, and the rotating shaft 133 passes through the interior of the indexing plate 110. In this embodiment, a top cover 134 is provided on the outer side of the shaft end of the rotating shaft 133 located above the indexing plate 110.

[0030] In this embodiment, when the lever 130 is reset, a torsion spring 135 is also sleeved on the rotating shaft 133. The torsion spring 135 is fixed to the lever 130 and the top cover 134 respectively. When the expansion plate 210 moves laterally, the lever 130 rotates around the rotating shaft 133, and the eccentric arc surface of its surface rotates accordingly, pushing the force against the support part of the support plate 120, causing it to disengage from the inner wall of the support groove 112 and bend inward to tighten the screw. When the external traction force is removed, under the elastic restoring force of the torsion spring 135, the lever 130 drives the rotating shaft 133 to rotate in the opposite direction to reset, thereby restoring the support part to a flat, wall-hugging state, ready for the screw loading at the next station.

[0031] Combination Figure 8 and Figure 9 As shown, this embodiment further optimizes the connection between the lever 130 and the expansion plate 210. Initially, the lever 130 is subjected to the elastic force of the torsion spring 135, while its driving surface is in contact with the transition connection of the support plate 120. Therefore, when the support portion of the support plate 120 is bent inward under force and during its transition from the support portion to the traction portion, sliding friction occurs with the driving surface of the lever 130. At this time, this friction alone is insufficient to overcome the resistance of the torsion spring 135 in the initial stage, making it impossible to drive the lever 130 to rotate.

[0032] Therefore, a slot is provided on the lever 130, and a column 132 is arranged coaxially with the rotating shaft 133 within the slot. Specifically, both ends of the column 132 are fixedly connected to the inner wall of the slot, and several turns of traction rope 131 are wound around the shaft of the column 132, wherein one end of the traction rope 131 is fixed to the column 132, and the other end extends to be fixed to the expansion plate 210; based on the above structure, the working principle of the equipment when dealing with small-sized screws is as follows: When the push plate 220 radially feeds and pushes the expansion plates 210 on both sides to slide backwards, the expansion plates 210 first begin to pull the traction part, causing the support part of the support plate 120 to tend to contract towards the traction part. At this time, the contact surface between the support part and the lever block 130 generates initial friction; at the same time, the backward movement of the expansion plate 210 will synchronously pull the traction rope 131 fixed on the column 132 outwards.

[0033] With the cooperation of the initial frictional force, combined with the outward forced pulling force applied to the column 132 by the traction rope 131, the two forces form a resultant force, which together overcomes the elastic potential energy of the torsion spring 135 sleeved on the rotating shaft 133, forcing the paddle block 130 to overcome the resistance of the torsion spring 135 as a whole, and move along... Figure 8 The arrow direction set in the text has been rotated.

[0034] Specifically, such as Figure 10 As shown, the rotation of the lever 130 further causes its eccentric arc surface to push the support portion of the support plate 120, causing the support portion of the support plate 120 to detach from the inner wall of the support groove 112 and bend inward, thereby supporting the screw of this type; when the indexing plate 110 rotates and generates centrifugal force, attempting to throw the screw out of the support groove 112, the bent and inward support portion will constrain the screw shank portion, preventing the screw from flying out during processing or when the indexing plate 110 changes positions.

[0035] In addition, considering that the screw to be processed has a certain weight, in order to prevent the support plate 120 from losing the rigid support of the wall after it detaches from the inner wall of the support groove 112 and bends and shrinks inward, thus failing to support the screw, this embodiment adds an auxiliary component for the support part inside the indexing plate 110.

[0036] Specifically, a third chamber is provided inside the indexing plate 110, located between the two expansion plates 210. The third chamber is connected to the inner cavity of the support groove 112, and the axis of the third chamber is perpendicular to the tangent of the support portion of the corresponding support piece 120. That is, the direction of the supporting force in the third chamber is always perpendicular to the horizontal reference plane of the support portion in this state. Furthermore, a tension spring 123 is elastically fixedly connected between the interior of the third chamber and the support portion of the support piece 120. An auxiliary rod 122 is coaxially sleeved inside the tension spring 123. One end of the auxiliary rod 122 is fixedly connected to the support portion of the support piece 120, and the other end slides through the third chamber of the indexing plate 110.

[0037] In actual processing, when the support end of the support plate 120 detaches from the inner wall of the support groove 112 and undergoes bending deformation, the tension spring 123 is stretched, and the auxiliary rod 122 partially slides outward, but part of the auxiliary rod 122 is still located inside the indexing plate 110. Since the rigid attachment support of the side wall is lost, the weight of the screw will be entirely pressed on the support part. At this time, since the axis of the third chamber is perpendicular to the tangent of the support part, the auxiliary rod 122 can always bear the gravity in the vertical direction. The screw placed on the support part is pressed down under the action of gravity, and the auxiliary rod 122 provides support for the support part, thereby avoiding the problem of lateral tilting caused by the bending deformation of the support part, so that the support part can still provide stable support force for the screw in the suspended state.

[0038] Once the screw marking is completed, the processed screw can be removed by a robotic arm or manually. When switching to a larger marked screw model, the push plate 220 cancels the power, and the torsion spring 135 drives the lever 130 to rotate in the opposite direction to reset. Under the elastic action of the tension spring 123, the support plate 120 loses the pushing force and moves closer to the inner wall of the support groove 112, and the support cavity reopens.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precision screw laser engraving and marking positioning device, comprising a main unit cabinet (100), a lifting frame (101), and a laser marking head (102) that can move vertically on the lifting frame (101), wherein an indexing plate (110) is provided on the main unit cabinet (100) directly below the laser marking head (102), characterized in that: The indexing plate (110) has a plurality of support grooves (112) arranged in an array along its outer circumference. The support grooves (112) are used to accommodate and position the screws to be marked, and the support grooves (112) correspond to the laser marking head (102). Each support groove (112) has a support piece (120) attached to its inner cavity for supporting the screws to be marked. The support piece (120) has a support portion for supporting the bottom of the screw, and a traction portion located on both sides of the support portion and extending outward. The indexing plate (110) is also provided with a toggle mechanism and a traction mechanism (200). The traction part of the support plate (120) is wrapped around and hooked on the toggle mechanism. The traction part and the toggle mechanism are connected to the traction mechanism (200) provided inside the indexing plate (110). When the traction mechanism (200) applies traction force to the traction parts on both sides, the traction mechanism (200) is used to drive the traction parts on both sides to make a divergent movement, forcing the two ends of the support part to transition and contract towards the traction part along the toggle mechanism. The actuating mechanism can detach the support from the inner cavity of the support groove (112) by rotating, so that the support and the inner cavity of the support groove (112) form a tight embrace with the opening retracted, thereby forming top support and circumferential wrapping for the screw to be marked.

2. The precision screw laser engraving and marking positioning device according to claim 1, characterized in that: A rotary motor (111) is fixedly installed on the main unit cabinet (100), and the output shaft of the rotary motor (111) is coaxially connected to the indexing plate (110); The indexing plate (110) and the main unit cabinet (100) are spaced apart to form a clearance space between the bottom of the indexing plate (110) and the upper surface of the main unit cabinet (100); the clearance space is used to accommodate the screw rod portion passing through the support groove (112).

3. The precision screw laser engraving and marking positioning device according to claim 1, characterized in that: The support groove (112) is U-shaped with an outward opening and its inner diameter is larger than the outer diameter of the screw rod of the screw to be marked.

4. The precision screw laser engraving and positioning device according to claim 1, characterized in that: The traction mechanism (200) includes an expansion plate (210) arranged in a radially vertical direction along the indexing plate (110). A first chamber is provided inside the indexing plate (110). The expansion plate (210) is slidably disposed in the first chamber. One end of the expansion plate (210) is fixedly connected to the traction part of the support plate (120), and the other end extends and abuts against the push plate (220). The expansion plate (210) is provided with a slider that is slidably connected to the first chamber, and the movement direction of the expansion plates (210) on both sides is perpendicular to the radial movement direction of the push plate (220).

5. The precision screw laser engraving and marking positioning device according to claim 4, characterized in that: The push plate (220) is conical at one end near the expansion plate (210), and the push plate (220) and the expansion plate (210) have a slope at the contact point. The other end of the push plate (220) is fixedly connected to a push rod (221). A drive plate (223) is provided at the center of the indexing plate (110), and the outer edge of the drive plate (223) has several protrusions. The far end of the push rod (221) abuts against the recess formed between two adjacent protrusions. A drive motor (222) is fixedly installed on the indexing plate (110) and coaxially connected to the drive plate (223).

6. The precision screw laser engraving and marking positioning device according to claim 5, characterized in that: A return spring (224) is fitted on the top rod (221). The return spring (224) is located in the second cavity formed in the indexing plate (110). One end of the return spring (224) is fixed to the inner wall of the second cavity, and the other end is fixed to the push plate (220). Furthermore, a compression spring (225) is elastically connected between the expansion plate (210) and the inner wall of the first cavity.

7. The precision screw laser engraving and marking positioning device according to claim 4, characterized in that: The actuating mechanism is a toggle block (130) located at the connection between the traction part and the support part of the support piece (120). The toggle block (130) is in the shape of an eccentrically driven cam block, having a driving surface for supporting the traction part of the support piece (120) and an eccentric arc surface for peeling the support part of the support piece (120) from the inner wall of the support groove (112) and forcing it to bend and shrink inward.

8. The precision screw laser engraving and positioning device according to claim 7, characterized in that: The drive surface of the dial (130) is coaxially connected to a rotating shaft (133), which passes through the indexing plate (110) and is rotatably connected to the indexing plate (110). The rotating shaft (133) is covered by a top cover (134), which is fixed on the surface of the indexing plate (110). A torsion spring (135) is sleeved on the rotating shaft (133), with one end of the torsion spring (135) fixedly connected to the rotating shaft (133) and the other end fixedly connected to the top cover (134).

9. The precision screw laser engraving and marking positioning device according to claim 8, characterized in that: A slot is provided on the lever (130), and a column (132) is arranged coaxially with the rotating shaft (133) in the slot. The two ends of the column (132) are fixedly connected to the inner wall of the slot. Several traction ropes (131) are wound around the shaft of the column (132). One end of the traction rope (131) is fixed to the column (132), and the other end extends to be fixed to the expansion plate (210).

10. The precision screw laser engraving and marking positioning device according to claim 4, characterized in that: A third chamber is provided inside the indexing plate (110) between the two expansion plates (210). The third chamber is connected to the inner cavity of the support groove (112). The axis of the third chamber is perpendicular to the tangent of the support part of the corresponding support piece (120). A tension spring (123) is elastically fixed between the interior of the third chamber and the support part of the support piece (120). An auxiliary rod (122) is coaxially sleeved inside the tension spring (123). One end of the auxiliary rod (122) is fixedly connected to the support part of the support piece (120), and the other end slides through the third chamber of the indexing plate (110).

Images