Error proofing device for workpiece clamping mechanism

Abstract

The invention discloses a mistake-proofing device for a workpiece clamping mechanism, and relates to the technical field of mistake-proofing devices.The mistake-proofing device comprises a fixed base used for being installed on the workpiece clamping mechanism, and a rotating arm is rotatably arranged on the fixed base around a rotating axis extending in the second direction; the rotating arm is suitable for being assembled on the side, facing the workpiece clamping mechanism, of the workpiece in the first direction, a contact part is formed at the first end of the rotating arm in the length direction of the rotating arm and used for making contact with the positioning face, a pointer structure is formed at the second end of the rotating arm, and the indicating structure is located on one side of the pointer structure in the second direction. The side, facing the pointer structure, of the indication structure is provided with a first horizontal line, and the first direction, the second direction and the third direction are perpendicular to one another. Therefore, whether the workpiece is clamped in place or not can be quickly judged according to whether the pointer structure points to the first horizontal line or not, and the mistake proofing device is simple in structure, low in manufacturing cost, small in occupied space, not prone to causing misjudgment and capable of meeting the requirement for batch product production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of error-proofing devices, in particular to an error-proofing device for a workpiece clamping mechanism. BACKGROUND

[0002] In related art, there are generally two methods for determining whether the clamping mechanism is clamped in place during the machining process of the gearbox housing. One is the air tightness detection method, which requires an external air source, design and manufacture of air line, and design of PLC program on the operating system of the numerical control equipment for electrical aspects to determine whether the sealed air detection pressure is within the qualified range. The equipment numerical control system and the clamp need to be modified, which has a long modification cycle and high cost. The other is to detect whether there is a gap between the positioning surface of each workpiece and the supporting surface of the clamping mechanism by using a feeler gauge. This repeated action is easily affected by emotions, physical strength, and attention fluctuations, which can cause operation errors and quality problems. SUMMARY The present application aims to at least solve one of the technical problems in the prior art. To this end, one object of the present application is to provide an error-proofing device for a workpiece clamping mechanism, which can quickly determine whether the workpiece is clamped in place by whether the pointer structure points to the first horizontal line. The error-proofing device has a simple structure, low manufacturing cost, and small space occupation, and is not easy to cause misjudgment, which meets the requirements of batch product production. The error-proofing device for a workpiece clamping mechanism according to the embodiments of the present application, the workpiece has a positioning surface for abutting against the supporting surface of the workpiece clamping mechanism along a first direction, and the error-proofing device comprises: a fixed seat for mounting on the workpiece clamping mechanism; a rotating arm rotatably arranged on the fixed seat about a rotating axis extending in a second direction, and the rotating arm is adapted to be assembled on the side of the workpiece facing the workpiece clamping mechanism along the first direction. Along the length direction of the rotating arm, the first end of the rotating arm is formed with a contact portion for contacting the positioning surface, and the second end of the rotating arm is formed with a pointer structure, an indication structure located on one side of the pointer structure along the second direction, and the side facing the pointer structure has a first horizontal line extending in a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0003] The error-proof device for the workpiece clamping mechanism according to the embodiments of the present application is capable of intuitively displaying the clamping state of the workpiece by the rotation direction of the pointer structure, and has high error-proof capability. The workpiece clamping state can be quickly judged by whether the pointer structure points to the first horizontal line, which is a passive error-proof method and does not depend on the vigilance of the operator, thereby reducing the risk of quality problems of the workpiece caused by the judgment error of the operator. Compared with the traditional air tightness detection method and the method of repeatedly measuring the positioning surface by measuring tools, the error-proof device has a simple structure and can quickly detect without depending on the operation skill, thereby improving the measurement efficiency and ensuring the subsequent machining precision of the workpiece.

[0004] According to some embodiments of the present application, the first direction is the height direction of the error-proof device, and the height of the rotation axis is the same as the height of the first horizontal line along the first direction.

[0005] According to some embodiments of the present application, the rotating arm has a first side wall suitable for facing the workpiece along the first direction, the first side wall is formed with a contact boss, the contact boss is arranged adjacent to the first end, and the contact boss is a contact part.

[0006] According to some embodiments of the present application, the contact boss extends along the second direction.

[0007] According to some embodiments of the present application, the outer surface of the contact boss is an arc-shaped structure.

[0008] According to some embodiments of the present application, the pointer structure has a second side wall and a third side wall on both sides thereof along the first direction, the second side wall and the third side wall extend in a direction close to each other from the first end to the second end, and the end portion of the second side wall away from the first end is connected to the end portion of the third side wall away from the first end.

[0009] According to some embodiments of the present application, the side of the indication structure facing the pointer structure further has a plurality of second horizontal lines, the plurality of second horizontal lines are respectively located on both sides of the first horizontal line along the first direction, and the second horizontal lines extend along the third direction.

[0010] According to some embodiments of the present application, the fixing seat has two mounting walls, the two mounting walls are opposite and spaced apart along the second direction to form an assembly space between the two mounting walls, the rotating arm is arranged in the assembly space and is rotatably arranged on at least one mounting wall.

[0011] According to some embodiments of the present application, the error-proof device further comprises a pivot shaft, the pivot shaft is arranged in the rotating arm and the two mounting walls along the second direction, so that the rotating arm is rotatably arranged on the fixing seat.

[0012] According to some embodiments of the present application, the fixing base further has a mounting base, the mounting base and the mounting wall are arranged along the first direction, and the mounting wall is fixed to the mounting base. The mounting base is used for mounting to the workpiece clamping mechanism.

[0013] Additional aspects and advantages of the present application will be made apparent from the following description, which proceeds with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which: Figure 1 is a structural schematic diagram of the error-proofing device of the embodiment of the present application; Figure 2 is an indication diagram of the pointer structure when the workpiece is not clamped in place in the embodiment of the present application; Figure 3 is another indication diagram of the pointer structure when the workpiece is not clamped in place in the embodiment of the present application; Figure 4 is an indication diagram of the pointer structure when the workpiece is clamped in place in the embodiment of the present application.

[0015] Reference Signs: error-proofing device 100; fixing base 10; mounting wall 11; assembly space 12; pivot shaft 13; mounting base 14; rotating arm 20; contact portion 21; pointer structure 22; first side wall 23; contact boss 24; second side wall 24; third side wall 25; indication structure 30; first horizontal line 31; second horizontal line 32; workpiece clamping mechanism 200; support surface 201; workpiece 300; positioning surface 301. DETAILED DESCRIPTION

[0016] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0017] The following description refers to the accompanying drawings. Figures 1-4 The error-proofing device 100 for the workpiece clamping mechanism 200 according to the embodiment of the present application is described below, the workpiece 300 has a positioning surface 301 used for being opposite and abutting to the support surface 201 of the workpiece clamping mechanism 200 along the first direction, and the error-proofing device 100 comprises: The fixed seat 10 is used to be installed on the workpiece clamping mechanism 200. The rotating arm 20 is rotatably arranged on the fixed seat 10 around the rotating axis extending along the second direction, and the rotating arm 20 is suitable for being assembled on the side of the workpiece 300 facing the workpiece clamping mechanism 200 along the first direction. The first end of the rotating arm 20 is formed with a contact part 21 for contacting the positioning surface 301 along the length direction of the rotating arm 20. The second end of the rotating arm 20 is formed with a pointer structure 22, The indicating structure 30 is located on the side of the pointer structure 22 along the second direction, and the side facing the pointer structure 22 of the indicating structure 30 has a first horizontal line 31 extending along the third direction. The first direction, the second direction and the third direction are perpendicular to each other.

[0018] As shown in the first aspect of the present application, Figure 1 The first direction is the Z direction, the second direction is the Y direction, and the third direction is the X direction. The workpiece 300 has a positioning surface 301. When the workpiece 300 is clamped in place, the positioning surface 301 is opposite and abuts the supporting surface 201 of the workpiece clamping mechanism 200 along the first direction. The error-proofing device 100 includes a fixed seat 10 for installation on the workpiece clamping mechanism 200. In some embodiments of the present application, the fixed seat 10 and the workpiece clamping mechanism 200 can be fixedly connected by bolts, or the fixed seat 10 and the workpiece clamping mechanism 200 can be fixedly connected by clamping, but the present application is not limited thereto. The fixed seat 10 and the workpiece clamping mechanism 200 can also be fixedly connected by other means, as long as the fixed seat 10 is used to be installed on the workpiece clamping mechanism 200. The fixed seat 10 is installed on the workpiece clamping mechanism 200, which can integrate the error-proofing device 100 on the workpiece clamping mechanism, and can continuously prevent errors during the clamping process of the workpiece 300, so that the worker can adjust the workpiece 300 synchronously, without the need for additional error-proofing operation after the workpiece 300 is installed, which is beneficial to reduce the workload of the worker.

[0019] The rotating arm 20 is rotatably arranged on the fixed seat 10 around the rotating axis extending along the second direction. In some embodiments of the present application, the rotating arm 20 and the fixed seat 10 can be rotatably connected by a rotating shaft, or the rotating arm 20 and the fixed seat 10 can be rotatably connected by a bearing, but the present application is not limited thereto. The rotating arm 20 and the fixed seat 10 can also be rotatably connected by other means, as long as the rotating arm 20 is rotatably arranged on the fixed seat 10 around the rotating axis extending along the second direction.

[0020] As shown in the first aspect of the present application, Figure 1 And Figure 2As shown, the rotating arm 20 is adapted to be assembled to the side of the workpiece 300 facing the workpiece clamping mechanism 200 in the first direction, i.e. the rotating arm 20 is assembled below the workpiece 300, so that the rotating arm 20 can contact the positioning surface 301 of the workpiece 300. Along the length direction of the rotating arm 20, the first end of the rotating arm 20 forms a contact portion 21 (the first end of the rotating arm 20 refers to the end of the rotating arm 20 facing the workpiece 300), which is used to contact the positioning surface 301, and the second end of the rotating arm 20 (the second end of the rotating arm 20 refers to the end of the rotating arm 20 away from the workpiece 300) forms a pointer structure 22, which can be used to indicate whether the workpiece 300 is clamped in place.

[0021] Specifically, as shown in the figures, Figure 4 When the positioning surface 301 of the workpiece 300 is opposite, parallel and adhered to the support surface 201 of the workpiece clamping mechanism 200 in the first direction, the positioning surface 301 of the workpiece 300 is also opposite and parallel to the contact portion 21 in the first direction, at this time, the direction of the pointer structure 22 is parallel to the support surface 201 of the workpiece clamping mechanism 200, indicating that the workpiece 300 is clamped in place. As shown in the figures, Figure 2 and Figure 3 When there is an angle between the positioning surface 301 of the workpiece 300 and the support surface 201 of the workpiece clamping mechanism 200, there is also an angle between the positioning surface 301 of the workpiece 300 and the contact portion 21, at this time, the direction of the pointer structure 22 also forms an angle with the support surface 201 of the workpiece clamping mechanism 200, indicating that the workpiece 300 is not clamped in place.

[0022] The indicating structure 30 can be configured as an indicating board with scale lines, along the second direction, the indicating structure 30 is located on one side of the pointer structure 22, and the side of the indicating structure 30 facing the pointer structure 22 has a first horizontal line 31, which extends along a third direction, which is parallel to the support surface 201, when the pointer structure 22 points to the first horizontal line 31, it indicates that the workpiece 300 is clamped in place, when the pointer structure 22 points above or below the first horizontal line 31, the workpiece 300 is not clamped in place.

[0023] Thus, by the rotating direction of the pointer structure 22, it can be determined whether the workpiece 300 is clamped in place, avoiding the quality problem of unqualified workpiece 300 due to not clamped in place, and the error-proof device 100 has simple structure, low manufacturing cost, small space occupation, and meets the requirements of batch production.

[0024] The error-proof device 100 for the workpiece clamping mechanism 200 according to the embodiment of the present application, the rotation direction of the pointer structure 22 directly shows the clamping state of the workpiece 300, has high error-proof ability, and can quickly judge whether the workpiece 300 is clamped in place through whether the pointer structure 22 points to the first horizontal line 31, is a passive error-proof, does not depend on the vigilance of the operator, and can further reduce the risk of quality problems of the workpiece 300 caused by the judgment error of the operator. And compared with the traditional air-tight detection method and the method of repeatedly measuring the positioning surface 301 by measuring tools, the error-proof device 100 has simple structure and can realize rapid detection without depending on operation skills, which can improve the measurement efficiency and ensure the subsequent machining precision of the workpiece 300.

[0025] According to some embodiments of the present application, as shown in Figure 4 The first direction is the height direction of the error-proof device 100, and along the first direction, the height of the rotation axis is the same as the height of the first horizontal line 31.

[0026] The height of the rotation axis is the same as the height of the first horizontal line 31, so that the pointer structure 22 points to the first horizontal line 31 and is located in the horizontal position. Since the support surface 201 is used as a reference and is in the horizontal position, when the workpiece 300 is clamped in place, the positioning surface 301 of the workpiece 300 is attached to the support surface 201, i.e., the positioning surface 301 is in the horizontal position. Through the lever principle of the rotating arm 20, the contact surface in contact with the positioning surface 301 is in the horizontal position, so that the pointer structure 22 points to the first horizontal line 31. The error-proof device 100 directly shows the clamping state of the workpiece 300 and has high error-proof ability. As long as the pointer structure 22 does not point to the first horizontal line 31, it means that the workpiece 300 is not installed in place, which can avoid the next work of the worker and can avoid the batch quality accident caused by the clamping of the workpiece 300 not in place. It is a passive error-proof and does not depend on the vigilance of the operator, which can further reduce the risk of quality problems of the workpiece 300 caused by the judgment error of the operator.

[0027] And, compared with the traditional air-tight detection method and the method of repeatedly measuring the positioning surface 301 by measuring tools, the use process of the error-proof device 100 is simple, which can realize rapid detection without depending on operation skills, can improve the measurement efficiency and ensure the subsequent machining precision of the workpiece 300.

[0028] According to some embodiments of the present application, as shown in Figure 1 Along the first direction, the rotating arm 20 has a first side wall 23 suitable for facing the workpiece 300, the first side wall 23 is formed with a contact boss 24, the contact boss 24 is arranged adjacent to the first end, and the contact boss 24 is the contact part 21.

[0029] The rotating arm 20 has a first side wall 23 suitable for facing the workpiece 300, and the first side wall 23 is formed with a contact boss 24, which can be integrally formed with the first side wall 23 or fixedly connected with the first side wall 23 by bonding, but the application is not limited thereto, and the contact boss 24 and the first side wall 23 can also be fixedly connected by other means as long as the first side wall 23 is formed with the contact boss 24.

[0030] The flatness error, wear or dust can cause mispositioning, the contact boss 24 is arranged in abutment with the first end, the contact boss 24 is the contact part 21, can realize point contact or line contact between the rotating arm 20 and the positioning surface 301, avoid face contact between the first side wall 23 and the positioning surface 301, and can reduce the error. When a larger contact surface is contacted, the force point and the wind direction can not be clear, the contact boss 24 as a clear and local contact point can receive a slight change of the positioning surface 301 of the workpiece 300 in the first direction, and a large swing of the pointer structure 22 occurs, that is, the principle of leverage, and the small can be seen as the large, which can intuitively show whether the workpiece 300 is clamped in place.

[0031] According to some embodiments of the application, as shown in Figure 1 The contact boss 24 can extend in the second direction to form line contact between the contact boss 24 and the positioning surface 301, which can greatly improve the stability, rigidity and durability of the contact under the premise of ensuring high precision and certainty, and ensure that a reliable, durable and repeatable reference can be established between the contact part 21 (contact boss 24) and the positioning surface 301 of the workpiece 300, so that the levelness information of the positioning surface 301 of the workpiece 300 is stably and accurately transmitted to the pointer structure 22, and the long-term reliable operation of the whole error-proof device 100 is finally ensured.

[0032] According to some embodiments of the application, as shown in Figure 1 The outer surface of the contact boss 24 can be an arc structure, which can introduce controllable and low-friction rotational freedom while maintaining line contact between the contact boss 24 and the positioning surface 301, thereby improving the fault tolerance and smoothness of the error-proof device 100. It is ensured that the rotating arm 20 can smoothly and sensitively respond to the change of the position of the workpiece 300 and point to the most accurate position. The arc surface can automatically adapt to the slight non-parallelism, and when the contact boss 24 is stressed, the arc contact will naturally stabilize at the position where the force is perpendicular to the normal direction of the arc surface, thereby realizing uniform force transmission and optimal contact stress distribution, compensating for slight machining and assembly errors, and thereby improving the measurement accuracy of the error-proof device 100 to ensure the subsequent machining quality of the workpiece 300.

[0033] According to some embodiments of the application, as shown in Figure 1As shown, along the first direction, the pointer structure 22 has a second side wall 24 and a third side wall 25 on two sides thereof, respectively, and the second side wall 24 and the third side wall 25 extend in a direction close to each other from the first end to the second end, and the end of the second side wall 24 away from the first end is connected to the end of the third side wall 25 away from the first end. The second side wall 24 and the third side wall 25 form a closed triangular cross section, which provides the pointer structure 22 with high torsional stiffness, effectively prevents the pointer structure 22 from being twisted in the direction of its own axis, ensures the pointing accuracy of the pointer tip, and further improves the measurement accuracy of the error-proof device 100.

[0034] According to some embodiments of the present application, as shown in Figures 1-4 As shown, the side of the indicating structure 30 facing the pointer structure 22 also has a plurality of second horizontal lines 32, and along the first direction, the plurality of second horizontal lines 32 are respectively located on two sides of the first horizontal line 31, and the second horizontal lines 32 extend along the third direction.

[0035] Among them, the side of the indicating structure 30 facing the pointer structure 22 also has a plurality of second horizontal lines 32, and in some embodiments of the present application, the side of the indicating structure 30 facing the pointer structure 22 can also have two, four, six, etc. The number of second horizontal lines 32, but the present application is not limited to this, and the side of the indicating structure 30 facing the pointer structure 22 can also have other numbers of second horizontal lines 32, as long as the side of the indicating structure 30 facing the pointer structure 22 also has a plurality of second horizontal lines 32.

[0036] Along the first direction, the plurality of second horizontal lines 32 are respectively symmetrically located on two sides of the first horizontal line 31, and the second horizontal lines 32 extend along the third direction. Through the arrangement of the plurality of second horizontal lines 32, the operator can intuitively see the deviation degree of the workpiece 300, and through the deviation scale number between the second horizontal lines 32 and the first horizontal line 31, the operator can be guided to finely adjust or greatly adjust the workpiece 300, so that the adjustment process becomes fast, intuitive and one-time, and the adjustment time is greatly reduced.

[0037] According to some embodiments of the present application, as shown in Figure 1 As shown, the fixing seat 10 has two mounting walls 11, and the two mounting walls 11 are opposite and spaced apart along the second direction to form an assembly space 12 between the two mounting walls 11, and the rotating arm 20 is arranged in the assembly space 12 and is rotatably arranged on at least one mounting wall 11.

[0038] The two mounting walls 11 are opposite and spaced apart along the second direction to form an assembly space 12 between the two mounting walls 11, which provides a protected area for the rotating arm 20, avoiding direct collision and interference with external objects. The rotating arm 20 penetrates the assembly space 12 and is rotatably arranged on at least one mounting wall 11. In some embodiments of the present application, the rotating arm 20 can be arranged on one of the mounting walls 11, or the rotating arm 20 can be arranged on both mounting walls 11 (the present application is described by taking this embodiment as an example), which can provide symmetrical and balanced support for the rotating arm 20, greatly enhancing the overall rigidity and stability of the error-proof device 100, thereby ensuring the reliability of the error-proof device 100 for the workpiece 300.

[0039] According to some embodiments of the present application, as shown in Figure 1 The error-proof device 100 further comprises a pivot shaft 13, which penetrates the rotating arm 20 and the two mounting walls 11 along the second direction, so that the rotating arm 20 is rotatably arranged on the fixed base 10.

[0040] The pivot shaft 13 penetrates the rotating arm 20 and the two mounting walls 11 along the second direction, so that the rotating arm 20 is rotatably arranged on the fixed base 10, which can provide symmetrical and balanced support for the rotating arm 20. The force is dispersed to the two mounting walls 11 through the pivot shaft 13, avoiding the problem of excessive stress concentration at a single support point, greatly enhancing the overall rigidity and stability of the error-proof device 100, and further ensuring the reliability of the error-proof device 100 for the workpiece 300.

[0041] According to some embodiments of the present application, as shown in Figure 1 The fixed base 10 can further have a mounting base 14, which is arranged along the first direction with the mounting walls 11, and the mounting walls 11 are fixed to the mounting base 14. The mounting base 14 is used for mounting on the workpiece clamping mechanism 200.

[0042] The mounting base 14 and the mounting walls 11 are arranged along the first direction, and the mounting walls 11 are fixed to the mounting base 14, which provides a unified reference surface for the two mounting walls 11, can ensure the relative position accuracy of the two mounting walls 11 and the workpiece clamping mechanism 200, and can effectively suppress the interference of external vibration on the pointing stability of the pointer structure 22. Moreover, the two mounting walls 11 are mounted to the workpiece clamping mechanism 200 through the mounting base 14, so that the mistake-proofing device 100 only needs to be connected to the workpiece clamping mechanism 200 through the mounting base 14, which reduces the installation difficulty of the mistake-proofing device 100. Moreover, the force transmitted by the two mounting walls 11 can be evenly dispersed to the workpiece clamping mechanism 200 through the mounting base 14, which avoids the local deformation of the workpiece clamping mechanism 200 caused by the direct mounting of the mounting seat 10 to the workpiece clamping mechanism 200, and effectively improves the service life of the workpiece clamping mechanism 200 and the mistake-proofing device 100.

[0043] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A mistake prevention device for a workpiece clamping mechanism, characterized by, The workpiece has a positioning surface for abutting against a support surface of the workpiece clamping mechanism along a first direction, and the error-proofing device comprises: a fixing base for being mounted on the workpiece clamping mechanism; a rotating arm rotatably provided on the fixing base about a rotating axis extending along a second direction, and adapted to be assembled on a side of the workpiece facing the workpiece clamping mechanism along the first direction, a first end of the rotating arm being formed with a contact portion for contacting the positioning surface along a length direction of the rotating arm, and a pointer structure being formed at a second end of the rotating arm, an indicating structure located on one side of the pointer structure along the second direction and having a first horizontal line on a side facing the pointer structure, the first horizontal line extending along a third direction, the first direction, the second direction and the third direction being perpendicular to each other.

2. The mistake prevention device for a workpiece clamping mechanism according to claim 1, characterized by, The first direction is a height direction of the error-proofing device, and the height of the rotating axis and the height of the first horizontal line are the same along the first direction.

3. The mistake prevention device for a workpiece clamping mechanism according to claim 1, characterized by, The rotating arm has a first side wall adapted to face the workpiece along the first direction, the first side wall being formed with a contact boss adjacent to the first end, the contact boss being the contact portion.

4. The mistake prevention device for a workpiece clamping mechanism according to claim 3, characterized by, The contact boss extends along the second direction.

5. The mistake prevention device for a workpiece clamping mechanism according to claim 3, characterized by, An outer surface of the contact boss is an arc-shaped structure.

6. The mistake preventing device for a workpiece clamping mechanism according to claim 1, characterized by, The pointer structure has a second side wall and a third side wall on two sides thereof along the first direction, the second side wall and the third side wall extending towards each other from the first end to the second end, and an end of the second side wall away from the first end is connected to an end of the third side wall away from the first end.

7. The mistake preventing device for a workpiece clamping mechanism according to claim 1, characterized by, The side of the indicating structure facing the pointer structure further has a plurality of second horizontal lines located on two sides of the first horizontal line along the first direction, the second horizontal lines extending along the third direction.

8. The mistake prevention device for a workpiece clamping mechanism according to any one of claims 1 to 7, characterized in that, The fixing base has two mounting walls opposite and spaced apart along the second direction to form an assembly space between the two mounting walls, the rotating arm being provided in the assembly space and rotatably provided on at least one of the mounting walls.

9. The mistake prevention device for a workpiece clamping mechanism according to claim 8, characterized by, The error-proofing device further comprises a pivot shaft provided in the rotating arm and the two mounting walls along the second direction, so that the rotating arm is rotatably provided on the fixing base.

10. The mistake prevention device for a workpiece clamping mechanism according to claim 8, characterized by, The fixing base further has a mounting base arranged along the first direction and fixed to the mounting walls, the mounting base being used for being mounted on the workpiece clamping mechanism.

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