A dotting device

Abstract

The utility model relates to a kind of dotting device, including the rack fixed by bolt in the side of equipment, the surface of the rack is slidably connected with lifting frame by sliding groove, the surface of the rack is provided with the calibration mechanism for adjusting the height of lifting frame;The utility model relates to the technical field of dotting.It is ensured that the pressure feedback control mechanism pressure switch+spring+sliding fixing frame of a kind of dotting device is constant, and the consistency of the dotting strength is not influenced by pen point wearout.Combination precise height calibration mechanism, stable pen clamping design and reliable limit protection, efficient, accurate, reliable and strong adaptability of the automated dotting function are realized, and many defects of traditional dotting mode are effectively overcome.

Description

Technical Field

[0001] This utility model relates to the field of dotting technology, specifically a dotting device. Background Technology

[0002] In the processing of automotive dry-fill products, it is often necessary to make precise markings on the workpiece surface (such as drawing positioning lines, marking center points, and identifying defect locations). Traditional manual marking methods are inefficient, inconsistent, and dependent on the operator's skill level, making it difficult to ensure that the pressure and positional accuracy of each mark are exactly the same.

[0003] While existing automated or semi-automated tracking devices can improve efficiency, they generally suffer from the following pain points:

[0004] Poor pressure control: The pressure applied during dotting is a key factor affecting the clarity and consistency of markings. Existing devices often lack reliable pressure feedback and adjustment mechanisms. As dotting markers (such as styluses and pen tips) wear down naturally with use, their effective length shortens. If the device continues to move according to a preset fixed stroke, the actual pressure upon contact with the workpiece will be significantly reduced, resulting in unclear markings, failure to form effective indentations, or excessively faint ink. Operators need to frequently manually adjust the stroke or replace the pen tip, impacting efficiency and automation.

[0005] Inconvenient height adjustment: For workpieces of different thicknesses and shapes, or applications requiring different dotting heights, the height of the dotting pen needs to be flexibly adjusted. Existing adjustment mechanisms are often not precise enough or cumbersome to operate (such as requiring complete disassembly or the use of shims), making it difficult to achieve quick and accurate fine-tuning, which affects the accuracy and adaptability of the dotting position.

[0006] Impact and stability: The impact force at the moment of dotting may cause slight deviation or vibration of the pen tip or pen body, affecting the dotting accuracy (dot position deviation) and the long-term stability of the device, and may even damage the pen tip or drive components.

[0007] Pen tip fixation reliability: Simple clamping methods may loosen under repeated impacts, causing the pen tip to deflect or slide during dotting, affecting the marking quality. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a dotting device that solves the aforementioned problems.

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution: a dotting device, including a frame fixed to the side of the equipment by bolts, a lifting frame slidably connected to the surface of the frame through a sliding groove, and a calibration mechanism for adjusting the height of the lifting frame provided on the surface of the frame;

[0010] A movable block driven by a cylinder is slidably connected to the surface of the lifting frame. A fixed frame is slidably connected to the surface of the movable block. A dotted marker pen is locked to the surface of the fixed frame by a locking ring. A connecting rod is fixedly connected to the right side of the fixed frame. A push plate is fixedly connected to the surface of the movable block. One end of the connecting rod passes through one side of the push plate and extends to the other side of the push plate. The surface of the connecting rod is slidably connected to the inner cavity of the push plate. A return spring is sleeved on the surface of the connecting rod. The two ends of the return spring abut against the sides of the push plate and the fixed frame, respectively. A fixed frame is located on the surface of the movable block. The pressure switch at the right end of the connecting rod, when in use, activates the cylinder to move the moving block to the left, which in turn moves the fixed frame to the left, causing the marking pen to mark the workpiece. During marking, the marking pen is impacted, causing the fixed frame to move to the right on the moving block, compressing the return spring, which in turn moves the connecting rod to impact the pressure switch. Once the pressure switch reaches its trigger pressure, it controls the cylinder to retract, completing the marking process. The pressure switch ensures the marking force and maintains a good marking effect even after the marking pen wears down over time, allowing for proper marking of the workpiece.

[0011] As a further embodiment of this utility model: a limiting plate located on the right side of the fixing frame is fixedly connected to the surface of the moving block, and the limiting plate limits the movement of the connecting rod to prevent it from moving excessively and causing damage to the pressure switch.

[0012] As a further embodiment of this utility model: the calibration mechanism includes two positioning plates fixed above and below the lifting frame respectively. One side of the positioning plate is threaded with a limit bolt. The two ends of the two limit bolts abut against the upper and lower sides of the lifting frame respectively. By adjusting the extension length of the limit bolts to abut against the two sides of the lifting frame, the height of the lifting frame is adjusted, thereby adjusting the position of the dot marker.

[0013] As a further embodiment of this utility model: a collar sleeved on the end of the dot marker is fixedly connected to the left side of the fixing frame. The collar fixes the dot marker more accurately and can prevent it from shifting due to force when dotting.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] Key features: Precise and consistent pressure applied to the dots, automatically adapting to nib wear.

[0016] Key innovation: The introduction of a linkage feedback mechanism consisting of a pressure switch, a reset spring, and a sliding fixing bracket.

[0017] Detailed explanation of effects:

[0018] Force sensing: When the dot marker touches the workpiece surface and applies pressure, the impact force will push the fixed frame to slide to the right relative to the moving block.

[0019] Spring buffering and energy storage: The sliding of the fixed frame will compress the return spring on the connecting rod.

[0020] Pressure triggering: The connecting rod moves to the right with the fixed frame, and its right end impacts the pressure switch. When the force generated by the compressed spring reaches the preset trigger threshold of the pressure switch, the switch is activated.

[0021] Automatic feedback control: After the pressure switch is triggered, a signal is immediately sent to control the cylinder to retract the moving block and the dotting pen.

[0022] Adaptability to Wear: This is the most critical advantage. As the pen tip wears down and shortens, its contact point with the workpiece will advance. However, this device does not rely on a fixed end point of the stroke. As long as the pen contacts the workpiece and applies sufficient pressure, the pressure switch is triggered, and the cylinder immediately retracts. Therefore, regardless of the degree of pen tip wear, the device can ensure that the actual pressure for each marking remains constant at the set value, ensuring clear and consistent markings. This completely solves the problem of unclear markings caused by pen tip wear, significantly extends the effective maintenance cycle, and improves automation reliability.

[0023] Precise and convenient height adjustment (calibration mechanism):

[0024] Structure: A sliding groove is provided on the frame, along which the lifting frame can slide. Positioning plates are fixed at the top and bottom of the lifting frame, and limit bolts are screwed onto the positioning plates.

[0025] Effect: By rotating the upper and lower limit bolts, the ends of the lifting frame can be tightened or loosened against the upper and lower surfaces, allowing for fine-tuning and locking of the lifting frame's height position within the sliding groove. This design is more precise, stable, and convenient than overall movement or shim adjustment, and can quickly adapt to the height requirements of different workpieces or markings, ensuring the accuracy of the marking positions.

[0026] Reliable pen hold and anti-deflection:

[0027] Structure: The fixing bracket locks the marker pen with a locking ring, and a fixed connecting collar is added to its left side.

[0028] Effect: The locking ring provides the main clamping force, while the collar at the end of the pen barrel provides auxiliary support and positioning, forming a two-point fixation. This structure greatly enhances the rigidity and stability of the dotting pen, effectively preventing the pen tip from deflecting or wobbling during dotting impact, ensuring the accuracy of the dotting position, and reducing the risk of pen tip damage.

[0029] Institutional protection and travel restrictions:

[0030] Structure: A limit plate is fixed on the movable block on the right side of the fixed frame.

[0031] Effect: The limit plate restricts the maximum sliding stroke of the fixed bracket relative to the moving block. This effectively prevents the connecting rod from excessively shifting to the right and violently impacting or even damaging the pressure switch under abnormal conditions, thus improving the safety and durability of the device.

[0032] Reset function: After the marking is completed, the reset spring pushes the fixing bracket and connecting rod to the left to reset, disengaging them from the pressure switch and preparing for the next marking action. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 This utility model Figure 1 A magnified view of a portion of point A in the middle.

[0035] In the diagram: 1. Frame; 2. Sliding groove; 3. Lifting frame; 4. Moving block; 5. Positioning plate; 6. Limit bolt; 7. Marking pen; 8. Fixing frame; 9. Limit plate; 10. Push plate; 11. Return spring; 12. Connecting rod; 13. Pressure switch. Detailed Implementation

[0036] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0037] Please see Figure 1-2 The present invention provides a technical solution: a dotting device, including a frame 1 fixed to the side of the equipment by bolts, a lifting frame 3 slidably connected to the surface of the frame 1 through a sliding groove 2, and a calibration mechanism for adjusting the height of the lifting frame 3 provided on the surface of the frame 1.

[0038] The surface of the lifting frame 3 is slidably connected to a moving block 4 driven by a cylinder. The surface of the moving block 4 is slidably connected to a fixed frame 8. A dot marker 7 is locked to the surface of the fixed frame 8 by a locking ring. A connecting rod 12 is fixedly connected to the right side of the fixed frame 8. A push plate 10 is fixedly connected to the surface of the moving block 4. One end of the connecting rod 12 passes through one side of the push plate 10 and extends to the other side of the push plate 10. The surface of the connecting rod 12 is slidably connected to the inner cavity of the push plate 10. A return spring 11 is sleeved on the surface of the connecting rod 12. The two ends of the return spring 11 abut against the sides of the push plate 10 and the fixed frame 8, respectively. A pressure switch 13 located at the right end of the connecting rod 12 is fixedly connected to the surface of the moving block 4.

[0039] The surface of the movable block 4 is fixedly connected to a limiting plate 9 located on the right side of the fixed frame 8.

[0040] The calibration mechanism includes two positioning plates 5 fixed on the upper and lower parts of the lifting frame 3, respectively. One side of the positioning plate 5 is threaded with a limit bolt 6, and the two ends of the two limit bolts 6 abut against the upper and lower parts of the lifting frame 3, respectively.

[0041] The left side of the fixing frame 8 is fixedly connected to a collar that is sleeved on the end of the dot marker pen 7.

[0042] Initial preparation for using this utility model:

[0043] Securely install frame 1 on the side of equipment such as a workbench or robotic arm using bolts.

[0044] Based on the workpiece height and dot position requirements, adjust the calibration mechanism: the limit bolts 6 on the upper and lower positioning plates 5 of the rotating lifting frame 3, finely adjust the height of the lifting frame 3 in the sliding groove 2 of the frame 1, and tighten and lock it. This determines the basic Z-axis height position of the dot pen 7.

[0045] Insert the marker pen 7 into the holder 8 and secure it firmly using the locking ring, ensuring the pen tip faces the workpiece. The end of the pen barrel should be embedded in the collar on the left side of the holder 8 for double securing.

[0046] Adjust the workpiece position or move the entire device so that the tip of the dotting pen 7 is directly above the X / Y plane position of the workpiece position to be dotted.

[0047] Start the dot loop:

[0048] The control system is activated, driving the cylinder to extend.

[0049] The cylinder piston rod pushes the moving block 4 along the track on the lifting frame 3, which is not clearly marked in the diagram, but the moving block 4 and the lifting frame 3 are slidably connected and move horizontally to the left toward the workpiece.

[0050] The moving block 4 drives the fixed frame 8 to move to the left through the sliding connection on its surface. At this time, the return spring 11 is in a natural or slightly compressed state.

[0051] The fixed frame 8 drives the dot marker 7 to move to the left until the pen tip contacts the surface of the workpiece.

[0052] Execution and Pressure Feedback:

[0053] The pen tip generates an impact force the instant it contacts the workpiece.

[0054] This impact force pushes the fixed frame 8 to overcome the elastic force of the return spring 11 and slide to the right relative to the moving block 4 which is moving to the left.

[0055] The fixed frame 8 moves the connecting rod 12 to the right together.

[0056] The right end of the connecting rod 12 compresses the return spring 11 and moves toward the pressure switch 13.

[0057] When the distance that the fixing bracket 8 and the connecting rod 12 slide to the right causes the force generated by the compression of the reset spring 11 to reach the preset trigger pressure threshold of the pressure switch 13, the right end of the connecting rod 12 triggers the pressure switch 13.

[0058] Automatic end of marking and reset:

[0059] Once pressure switch 13 is triggered, it immediately sends an electrical signal to the control system.

[0060] Upon receiving the signal, the control system immediately controls the cylinder to retract the piston rod.

[0061] The cylinder pulls the moving block 4 to the right, away from the workpiece.

[0062] At this point, the compressed return spring 11 begins to release its elastic force.

[0063] The reset spring 11 pushes the fixed frame 8 to slide to the left relative to the moving block 4 that is moving to the right, and at the same time drives the connecting rod 12 to move to the left, so that its right end is disengaged from the pressure switch 13.

[0064] The dot marker 7 leaves the workpiece surface along with the fixing frame 8, leaving clear and consistent markings or lines on the workpiece.

[0065] The moving block 4 returns to its initial position, and the fixed frame 8 and connecting rod 12 are also fully reset under the action of the return spring 11. The entire device is ready to perform the next dotting operation.

[0066] Key protection mechanisms:

[0067] During the sliding of the fixed frame 8 to the right, if the stroke is too large, for example, if the pressure switch does not respond in time, the right side of the fixed frame 8 will contact the limit plate 9 on the moving block 4, thereby preventing the fixed frame 8 from continuing to move to the right and protecting the pressure switch 13 and the connecting rod 12 from damage by excessive impact force.

[0068] In summary, the core innovation of this dotting device lies in its intelligent pressure feedback control mechanism—a pressure switch, spring, and sliding bracket—ensuring consistent dotting force unaffected by pen tip wear. Combined with a precise height calibration mechanism, a robust pen clamp design, and reliable limit protection, it achieves efficient, accurate, reliable, and highly adaptable automated dotting functionality, effectively overcoming many shortcomings of traditional dotting methods.

[0069] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A dotting device, comprising a frame (1) fixed to the side of the equipment by bolts, characterized in that: The frame (1) is slidably connected to a lifting frame (3) via a sliding groove (2), and the surface of the frame (1) is provided with a calibration mechanism for adjusting the height of the lifting frame (3). The surface of the lifting frame (3) is slidably connected to a moving block (4) driven by a cylinder. The surface of the moving block (4) is slidably connected to a fixed frame (8). The surface of the fixed frame (8) is locked with a dot marker pen (7) by a locking ring. A connecting rod (12) is fixedly connected to the right side of the fixed frame (8). A push plate (10) is fixedly connected to the surface of the moving block (4). One end of the connecting rod (12) passes through one side of the push plate (10) and extends to the other side of the push plate (10). The surface of the connecting rod (12) is slidably connected to the inner cavity of the push plate (10). A return spring (11) is sleeved on the surface of the connecting rod (12). The two ends of the return spring (11) abut against the sides of the push plate (10) and the fixed frame (8) respectively. A pressure switch (13) located at the right end of the connecting rod (12) is fixedly connected to the surface of the moving block (4).

2. The dotting device according to claim 1, characterized in that: The surface of the movable block (4) is fixedly connected to a limiting plate (9) located on the right side of the fixing frame (8).

3. The dotting device according to claim 1, characterized in that: The calibration mechanism includes two positioning plates (5) fixed on the upper and lower sides of the lifting frame (3), respectively. One side of the positioning plate (5) is threaded with a limit bolt (6), and the two ends of the limit bolt (6) abut against the upper and lower sides of the lifting frame (3) respectively.

4. The dotting device according to claim 1, characterized in that: The left side of the fixing frame (8) is fixedly connected to a collar sleeved on the end of the dot marker pen (7).

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