Ruling device

By designing a scribing device that includes mounting components, abutment mechanisms, and support mechanisms, the problem of tedious and inaccurate manual scribing of complex-shaped parts has been solved, achieving precise and stable scribing results.

CN224476201UActive Publication Date: 2026-07-10NGC (HUAIAN) HIGH SPEED GEAR MFG CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NGC (HUAIAN) HIGH SPEED GEAR MFG CO LTD
Filing Date
2025-08-22
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing technologies for scribing complex-shaped parts, such as turbine blades and irregular molds, rely on cumbersome and complex manual measurement and scribing methods with large errors, making it difficult to meet accuracy requirements.

Method used

A marking device is designed, including a mounting component, a contact mechanism, and a support mechanism. The contact mechanism contacts the part through a support frame and a contact wheel. The support mechanism is provided with stability by first and second support parts. The moving mounting component drives the contact mechanism and the support mechanism to move synchronously to achieve accurate marking.

Benefits of technology

It improves the accuracy and stability of scribing on complex-shaped parts, has a simple structure and is easy to operate, and is suitable for precise scribing of regular or irregular shaped parts.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model belongs to the field of machining technology and discloses a scribing device. The scribing device is used to scribble lines on parts. It includes a mounting component, a contact mechanism, and a support mechanism. The contact mechanism is used to contact the part and is movably connected to the mounting component along the contact direction. A scribing component is mounted on the contact mechanism. Movement of the contact mechanism relative to the part drives the scribing component to scribble lines on the part. The support mechanism includes a first support portion and a second support portion disposed on both sides of the contact mechanism along the movement direction of the mounting component. Both the first and second support portions are connected to the mounting component and are used to contact the part. This scribing device has a simple structure and is easy to operate. When the contact mechanism contacts the part and moves along the side wall of the part, it ensures the consistency and stability of the contact angle between the contact mechanism and the part, greatly improving the accuracy of the scribing position.
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Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a scribing device. Background Technology

[0002] In the processing of certain sheet metal parts, it is necessary to scribble a line around the outer contour of the sheet metal part with a margin, and then remove the excess edge of the part according to the drawn line to meet the assembly dimension requirements of the part. For parts with straight segments on the outer contour, workers can measure the distance and use a ruler to scribble lines on the surface of the part. However, for parts with outer contours composed of complex lines (such as arcs, wavy lines, etc.), manual measurement and scribing is extremely tedious and complex, and has a large error. Therefore, manual scribing is not suitable for processing complex shaped parts such as turbine blades and irregular molds. Utility Model Content

[0003] The purpose of this invention is to provide a marking device that is simple in structure, highly practical, and can improve the accuracy of marking positions.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This utility model provides a marking device, comprising:

[0006] Installation components;

[0007] The abutting mechanism includes a support frame and an abutting wheel. The support frame is connected to the mounting component along a first direction, and the abutting wheel is rotatably mounted on the support frame. The abutting wheel is used to abut against the part. The first direction is the abutting direction between the abutting mechanism and the part.

[0008] A scribing component is provided on the support frame and is used to scribing lines on the part.

[0009] The support mechanism includes a first support portion and a second support portion distributed on both sides of the abutment mechanism. Both the first support portion and the second support portion are connected to the mounting member and their positions relative to the mounting member are adjustable. Both the first support portion and the second support portion are used to abut against the part.

[0010] Preferably, the abutment mechanism further includes an elastic element and a sliding rod, the sliding rod being disposed on the mounting member along the first direction, the support frame being slidably disposed on the sliding rod, and the elastic element being disposed between the support frame and the mounting member.

[0011] Preferably, the abutting mechanism further includes a connecting rod, which is adjustablely positioned on the support frame along the first direction, and the marking member is detachably connected to the connecting rod, with scale lines marked on the connecting rod.

[0012] Preferably, the end of the connecting rod is provided with an assembly ring, the assembly ring is provided with a fixing member, and the assembly ring has a mounting through groove;

[0013] The marking element is axially inserted into the mounting slot, the fixing element is screwed to the assembly ring, and the end of the fixing element extending out of the assembly ring abuts against the marking element.

[0014] Preferably, the support frame includes a first connecting part and a second connecting part, the first connecting part is disposed on the slide rod, the connecting rod is disposed on the second connecting part, the first connecting part is rotatably connected to the second connecting part, and the rotation axis of the first connecting part is perpendicular to the first direction and parallel to the movement direction of the mounting component.

[0015] Preferably, the first support includes a first support rod and a first support wheel. The first support rod is rotatably connected to the mounting member and can be locked relative to the mounting member. The first support wheel is rotatably disposed at the end of the first support rod away from the mounting member and is used to abut against the part.

[0016] Preferably, the second support includes a second support rod and a second support wheel. The second support rod is rotatably connected to the mounting member and can be locked relative to the mounting member. The second support wheel is rotatably disposed on the second support rod and is used to abut against the part.

[0017] Preferably, the support mechanism further includes an adjustment component, which is slidably disposed on the mounting member along a first direction. The adjustment component is respectively connected to the first support rod and the second support rod. When the adjustment component moves along the first direction, the first support rod and the second support rod rotate respectively to drive the first support wheel and the second support wheel to move away from or closer to each other.

[0018] Preferably, the first support rod and the second support rod are rotatably connected to the mounting component via a first pin, and the mounting component has a sliding groove on it facing the first pin along the first direction;

[0019] The adjustment assembly includes two locking plates and a second pin slidably disposed in the sliding groove. The first support rod and the second support rod are rotatably connected to the second pin through the locking plates, and the angle between the first support rod and the first direction and the angle between the second support rod and the first direction are the same.

[0020] Preferably, the mounting component has a grip portion with an anti-slip structure.

[0021] The beneficial effects of this utility model are as follows:

[0022] The scribing device provided by this utility model is used to scribble lines on parts. The scribing device includes a mounting component, a contact mechanism, and a support mechanism. A support frame is connected to the mounting component along a first direction. A contact wheel on the support frame abuts against the part, and a scribing component is mounted on the support frame. Therefore, when the contact mechanism moves relative to the part, it can drive the scribing component to scribble lines on the part. The support mechanism includes a first support portion and a second support portion distributed on both sides of the contact mechanism. Both the first and second support portions are used to abut against the part, which can improve the stability of the scribing device during scribing. Simultaneously, because the first and second support portions are located on... The two sides of the abutting mechanism provide support, so when the abutting mechanism abuts against the part and moves along the side wall of the part, it can ensure the consistency and stability of the abutting angle between the abutting mechanism and the part, and prevent the abutting mechanism from deviating during the movement, which would cause the distance between the drawn line and the edge of the part to change, thus greatly improving the accuracy of the scribing position. In addition, since both the abutting mechanism and the support mechanism are connected to the mounting part, the abutting mechanism and the support mechanism can be moved synchronously by moving the mounting part, so as to accurately scribing lines on the part according to the set dimensions. The structure is simple, the operation is convenient, and the practicality is strong. Attached Figure Description

[0023] Figure 1 This is a first-view structural schematic diagram of the marking device provided in a specific embodiment of the present utility model;

[0024] Figure 2 This is a second-view structural schematic diagram of the marking device provided in a specific embodiment of the present utility model;

[0025] Figure 3 This is a top view of the marking device provided in a specific embodiment of this utility model.

[0026] In the picture:

[0027] 1-Installation component; 11-Sliding groove;

[0028] 2-Abutting mechanism; 21-Bearing frame; 22-Elastic element; 23-Slide rod; 24-Connecting rod; 25-Assembly ring; 251-Fixing element; 26-Abutting wheel;

[0029] 3-Support mechanism; 31-First support part; 311-First support rod; 312-First support wheel; 32-Second support part; 321-Second support rod; 322-Second support wheel; 33-Adjusting component; 331-Second pin; 332-Locking piece; 34-First pin;

[0030] 4- Marking component. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] like Figures 1 to 3As shown, this utility model provides a scribing device for scribing lines on parts. The scribing device includes a mounting component 1, a contact mechanism 2, and a support mechanism 3 for contacting the parts. The contact mechanism 2 includes a support frame 21 and a contact wheel 26. The support frame 21 is connected to the mounting component 1 along a first direction, and the contact wheel 26 is rotatably disposed on the support frame 21 for contacting the parts. The first direction is the contact direction between the contact mechanism 2 and the parts. A scribing component 4 is disposed on the support frame 21 and is used for scribing lines on the parts. The support mechanism 3 includes a first support portion 31 and a second support portion 32 distributed on both sides of the contact mechanism 2. Both the first support portion 31 and the second support portion 32 are connected to the mounting component 1 and their positions relative to the mounting component 1 are adjustable. Both the first support portion 31 and the second support portion 32 are used for contacting the parts.

[0036] In this embodiment, since the abutting mechanism 2 abuts against the part, and the bearing frame 21 of the abutting mechanism 2 is provided with a scribing element 4, the abutting mechanism 2 can drive the scribing element 4 to scribble on the part when it moves relative to the part; the support mechanism 3 includes a first support part 31 and a second support part 32 distributed on both sides of the abutting mechanism 2. Both the first support part 31 and the second support part 32 are used to abut against the part, which can improve the stability of the scribing device when scribing; at the same time, since the first support part 31 and the second support part 32 provide support for the abutting mechanism 2 on both sides of the abutting mechanism 2, Therefore, when the abutting mechanism 2 abuts against the part and moves along the side wall of the part, it can ensure the consistency and stability of the abutting angle between the abutting mechanism 2 and the part, and prevent the abutting mechanism 2 from deviating during the movement, which would cause the distance between the drawn line and the edge of the part to change, thereby greatly improving the accuracy of the drawing position. In addition, since the abutting mechanism 2 and the support mechanism 3 are both connected to the mounting part 1, the abutting mechanism 2 and the support mechanism 3 can be moved synchronously by moving the mounting part 1, so as to accurately draw lines on the part according to the set dimensions. The structure is simple, the operation is convenient, and the practicality is strong.

[0037] Specifically, this scribing device is used for scribing on the surface of parts with regular or irregular shapes. The part to be scribed has at least a side wall and an end face. During scribing, the abutting mechanism 2 abuts against the side wall of the part, and the scribing element 4 scribes on the end face of the part. The abutting mechanism 2 moves around the side wall of the part once, and the scribing element 4 draws the outer contour line of the part on the end face. The mounting part 1 is for hand gripping. When scribing, the operator can move the mounting part 1 to move the entire scribing device along the side wall of the part to scribing. It is understood that the scribing element 4 can be a pen, which draws lines by contacting and moving with the end face of the part; the scribing element 4 can also be a commonly used engraving knife or needle, which engraves lines by contacting and moving with the end face of the part. Specifically, as... Figure 2As shown, the abutting wheel 26 is rotatably mounted on the support frame 21. The abutting wheel 26 is used to abut against the part. The abutting wheel 26 can reduce the friction between the support frame 21 and the side wall of the part, so that the scribing device can move smoothly along the side wall of the part, thereby greatly improving the stability during scribing.

[0038] The specific structure of the abutment mechanism 2 can be set according to the actual situation. For example, such as... Figure 2 and Figure 3 As shown, the abutment mechanism 2 also includes an elastic element 22 and a sliding rod 23. The sliding rod 23 is disposed on the mounting part 1 along the first direction. The support frame 21 is slidably disposed on the sliding rod 23. The elastic element 22 is disposed between the support frame 21 and the mounting part 1. The scribing element 4 is disposed on the support frame 21. The elastic element 22 can automatically adjust the distance between the support frame 21 and the mounting part 1 according to the undulation of the side wall of the part, thereby driving the scribing element 4 on the support frame 21 to accurately draw the outline lines according to the shape of the outer contour of the part. Specifically, the support frame 21 is mounted on the slide rod 23, and the support frame 21 can slide along the slide rod 23 under the action of the elastic member 22. When scribing, the support frame 21 abuts against the side wall of the part under the elastic force of the elastic member 22. When passing the side wall with the middle protrusion, the support frame 21 approaches the mounting member 1 along the first direction and compresses the elastic member 22. Then the scribing member 4 on the support frame 21 will be driven to move towards the mounting member 1 along the first direction, thereby replicating the outer contour of the part with the middle protrusion. When passing the side wall with the middle concavity, the support frame 21 moves away from the mounting member 1 along the first direction under the elastic force of the elastic member 22. Then the scribing member 4 on the support frame 21 will be driven to move away from the mounting member 1 along the first direction, thereby replicating the outer contour of the part with the middle concavity. During this process, since the first support part 31 and the second support part 32 always abut against the side wall of the part, the mounting member 1 will not move along the first direction with the protrusion or concavity of the side wall.

[0039] To facilitate adjustment of the distance between the scribing component 4 and the side wall of the part, in order to meet the machining allowance requirements of different parts, such as... Figure 1 As shown, the abutment mechanism 2 also includes a connecting rod 24, which is adjustablely positioned on the support frame 21 along the first direction. The scribing component 4 is detachably connected to the connecting rod 24, and scale lines are marked on the connecting rod 24. In this embodiment, the scribing component 4 is fixedly positioned at the end of the connecting rod 24 away from the support frame 21. Since the connecting rod 24 is movably positioned on the support frame 21, the distance between the scribing component 4 and the side wall of the part can be adjusted by adjusting the position of the connecting rod 24 on the support frame 21 to meet the processing requirements of different parts. At the same time, since scale lines are marked on the connecting rod 24, the distance between the drawn line and the side wall of the part can be clearly known.

[0040] The assembly method of the scribing component 4 and the connecting rod 24 can be set according to the actual situation, as long as they can be detachably connected to each other, so that the scribing component 4 can be replaced according to the type of part. For example, such as Figure 1 and Figure 2 As shown, the end of the connecting rod 24 is provided with an assembly ring 25, and a fixing member 251 is provided on the assembly ring 25. The assembly ring 25 has a mounting groove. The scribing member 4 is axially inserted into the mounting groove. The fixing member 251 is screwed to the assembly ring 25, and the end of the fixing member 251 extending out of the assembly ring 25 abuts against the scribing member 4. Specifically, the assembly ring 25 and the connecting rod 24 are integrally formed. The assembly ring 25 has a threaded hole. The fixing member 251 is a bolt. The fixing member 251 is screwed into the threaded hole and abuts against the scribing member 4, thereby fixing the scribing member 4 and allowing adjustment according to the thickness of the scribing member 4.

[0041] To further improve the applicability of the marking device, the support frame 21 includes a first connecting part and a second connecting part. The first connecting part is disposed on the slide rod 23, and the connecting rod 24 is disposed on the second connecting part. The first connecting part is rotatably connected to the second connecting part, and the rotation axis of the first connecting part is perpendicular to the first direction and parallel to the movement direction of the mounting part 1. By rotating the first connecting part, the included angle between the marking part 4 and the end face of the part can be adjusted to meet the marking requirements of parts with different shapes. Furthermore, the second connecting part can also be configured as a vertically extendable structure, thereby further improving the applicability of the marking device.

[0042] The specific structures of the first support part 31 and the second support part 32 can be configured according to actual conditions, as long as they can provide stable support for the mounting part 1. For example, such as Figure 1 and Figure 3 As shown, the first support part 31 includes a first support rod 311 and a first support wheel 312. The first support rod 311 is rotatably connected to the mounting part 1 and can be locked relative to the mounting part 1. The first support wheel 312 is rotatably disposed on the first support rod 311 and is used to abut against the part. The second support part 32 includes a second support rod 321 and a second support wheel 322. The second support rod 321 is rotatably connected to the mounting part 1 and can be locked relative to the mounting part 1. The second support wheel 322 is rotatably disposed on the second support rod 321 and is used to abut against the part. The first support wheel 312, the second support wheel 322 cooperate with the abutment wheel 26 to reduce the friction between the scribing device and the side wall of the part, thereby further improving the stability during scribing.

[0043] like Figure 1As shown, the support mechanism 3 also includes an adjustment component 33, which is slidably disposed on the mounting member 1 along the first direction. The adjustment component 33 is connected to the first support rod 311 and the second support rod 321 respectively. When the adjustment component 33 moves along the first direction, the first support rod 311 and the second support rod 321 rotate respectively to drive the first support wheel 312 and the second support wheel 322 to move away from or closer to each other. By moving the adjustment component 33, the distance between the first support wheel 312 and the second support wheel 322 can be adjusted, so that the support mechanism 3 can adapt to curved surfaces with different curvatures or planes with different lengths, thereby improving the practicality of the marking device.

[0044] In this embodiment, as Figure 3 As shown, the first support rod 311 and the second support rod 321 have the same structure and size, and are symmetrically arranged on both sides of the abutment mechanism 2. The adjustment component 33 can adjust the first support rod 311 and the second support rod 321 synchronously.

[0045] The specific structure of the adjustment component 33 can be set according to the actual situation, as long as it can achieve synchronous adjustment of the first support part 31 and the second support part 32. For example, as shown in the figure... Figure 1 and Figure 3As shown, the first support rod 311 and the second support rod 321 are rotatably connected to the mounting component 1 via the first pin 34. The mounting component 1 has a sliding groove 11 along the first direction, directly opposite the first pin 34. The adjusting assembly 33 includes two locking plates 332 and a second pin 331 slidably disposed in the sliding groove 11. The first support rod 311 and the second support rod 321 are rotatably connected to the second pin 331 via the locking plates 332, and the angle between the first support rod 311 and the first direction and the angle between the second support rod 321 and the first direction are the same. Specifically, the two locking plates 332 are symmetrically arranged on both sides of the abutment mechanism 2. The first support rod 311 and the second support rod 321 can rotate about the first pin 34 as an axis, and the first support rod 311... The second support rod 321 is also symmetrically arranged on both sides of the abutment mechanism 2. Each of the two locking plates 332 has a first end and a second end along its length. The second ends of the two locking plates 332 are rotatably connected to the first support rod 311 and the second support rod 321, respectively. The first ends of the two locking plates 332 are rotatably connected through the second pin 331. Thus, the two locking plates 332, the first support rod 311, and the second support rod 321 form a movable quadrilateral structure. When the second pin 331 drives the first end of the locking plate 332 to move along the sliding groove 11, the second end of the locking plate 332 will push the first support rod 311 or the second support rod 321 to rotate around the first pin 34, thereby realizing the adjustment of the distance between the first support wheel 312 and the second support wheel 322. It is understandable that, since the first support rod 311 and the second support rod 321 are symmetrically arranged on both sides of the abutment mechanism 2, and the sliding groove 11 is set directly opposite the first pin 34, when the first support rod 311 and the second support rod 321 are adjusted by moving the second pin 331, the first support rod 311 and the second support rod 321 can always maintain a symmetrical state with respect to the abutment mechanism 2.

[0046] Specifically, the first pin 34 is threaded to the mounting part 1, and the first pin 34 can lock the first support rod 311 and the second support rod 321 onto the mounting part 1 to prevent the first support rod 311 and the second support rod 321 from rotating; the second pin 331 always maintains a rotational engagement with the first support rod 311 and the second support rod 321, and the second pin 331 can move along the sliding groove 11.

[0047] In this embodiment, both the abutment mechanism 2 and the support mechanism 3 are connected to the mounting part 1, and the mounting part 1 is for human hand gripping. Therefore, the worker can move the entire marking device to perform marking operations by holding and moving the mounting part 1. Specifically, the mounting part 1 has a cylindrical gripping part. In order to increase the friction between the human hand and the gripping part and improve the controllability of the marking device, the gripping part is provided with an anti-slip structure. The anti-slip structure can be an anti-slip groove or an anti-slip ridge.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A marking device, characterized in that, include: Mounting component (1); The abutting mechanism (2) includes a support frame (21) and an abutting wheel (26). The support frame (21) is connected to the mounting member (1) along a first direction. The abutting wheel (26) is rotatably disposed on the support frame (21). The abutting wheel (26) is used to abut against the part. The first direction is the abutting direction between the abutting mechanism (2) and the part. A scribing component (4) is disposed on the support frame (21), and the scribing component (4) is used to scribing on the part; The support mechanism (3) includes a first support portion (31) and a second support portion (32) distributed on both sides of the abutting mechanism (2). The first support portion (31) and the second support portion (32) are both connected to the mounting member (1) and their positions relative to the mounting member (1) are adjustable. The first support portion (31) and the second support portion (32) are both used to abut against the part.

2. The marking device according to claim 1, characterized in that, The abutting mechanism (2) further includes an elastic element (22) and a slide rod (23). The slide rod (23) is disposed on the mounting member (1) along the first direction. The support frame (21) is slidably disposed on the slide rod (23). The elastic element (22) is disposed between the support frame (21) and the mounting member (1).

3. The marking device according to claim 2, characterized in that, The abutting mechanism (2) further includes a connecting rod (24), which is adjustablely positioned on the support frame (21) along the first direction. The marking member (4) is detachably connected to the connecting rod (24), and scale lines are marked on the connecting rod (24).

4. The marking device according to claim 3, characterized in that, The end of the connecting rod (24) is provided with an assembly ring (25), and a fastener (251) is provided on the assembly ring (25). The assembly ring (25) has a mounting groove. The marking member (4) is axially inserted into the mounting slot, the fixing member (251) is screwed to the assembly ring (25), and the end of the fixing member (251) extending out of the assembly ring (25) abuts against the marking member (4).

5. The marking device according to claim 2, characterized in that, The support frame (21) includes a first connecting part and a second connecting part. The first connecting part is disposed on the slide rod (23), and the marking member (4) is disposed on the second connecting part. The second connecting part is rotatably connected to the first connecting part, and the rotation axis of the second connecting part is perpendicular to the first direction and parallel to the moving direction of the mounting member (1).

6. The marking device according to claim 1, characterized in that, The first support part (31) includes a first support rod (311) and a first support wheel (312). The first support rod (311) is rotatably connected to the mounting member (1) and can be locked relative to the mounting member (1). The first support wheel (312) is rotatably disposed at the end of the first support rod (311) away from the mounting member (1). The first support wheel (312) is used to abut against the part.

7. The marking device according to claim 6, characterized in that, The second support part (32) includes a second support rod (321) and a second support wheel (322). The second support rod (321) is rotatably connected to the mounting member (1) and can be locked relative to the mounting member (1). The second support wheel (322) is rotatably disposed on the second support rod (321) and is used to abut against the part.

8. The marking device according to claim 7, characterized in that, The support mechanism (3) further includes an adjustment component (33), which is slidably disposed on the mounting member (1) along a first direction. The adjustment component (33) is connected to the first support rod (311) and the second support rod (321) respectively. When the adjustment component (33) moves along the first direction, the first support rod (311) and the second support rod (321) rotate respectively to drive the first support wheel (312) and the second support wheel (322) to move away from or closer to each other.

9. The marking device according to claim 8, characterized in that, The first support rod (311) and the second support rod (321) are rotatably connected to the mounting component (1) via a first pin (34). The mounting component (1) has a sliding groove (11) on it facing the first pin (34) along the first direction. The adjustment assembly (33) includes two locking plates (332) and a second pin (331) slidably disposed in the sliding groove (11). The first support rod (311) and the second support rod (321) are rotatably connected to the second pin (331) through the locking plates (332), and the angle between the first support rod (311) and the first direction and the angle between the second support rod (321) and the first direction are the same.

10. The marking device according to any one of claims 1-9, characterized in that, The mounting component (1) has a grip portion, on which an anti-slip structure is provided.