A measuring tool for detecting flatness

Abstract

This utility model relates to the field of inspection tool technology and discloses a flatness measuring tool, comprising: a base, a positioning frame, and a measuring plate. The base has a groove on its surface for positioning and loading the part to be inspected. The positioning frame is disposed on the top of the base, forming a receiving space together with the base. The measuring plate is installed within the receiving space, with its top surface slidingly engaged with the positioning frame and its bottom surface slidingly engaged with the base near the groove. A detection surface is provided on the side of the measuring plate near the groove, which contacts the surface of the part to be inspected. The detection surface slides linearly along the length or width of the groove to measure the flatness of the part to be inspected.

Description

Technical Field

[0001] This utility model relates to the field of inspection tool technology, specifically a measuring tool for detecting flatness. Background Technology

[0002] Flatness inspection tools are used to determine the flatness of part surfaces. Existing tools are mostly handheld gauges, visual inspection, or large precision instruments. Manual inspection relies on operator experience, and uneven pressure can easily lead to errors. Large instruments are complex in structure, expensive, and have cumbersome inspection processes, making them unsuitable for batch inspection of parts. This results in low inspection efficiency and unstable accuracy, making it difficult to meet the needs of rapid and accurate inspection in production.

[0003] Therefore, there is an urgent need for a measuring tool to detect flatness to solve the above problems. Utility Model Content

[0004] Based on the above, the purpose of this utility model is to provide a measuring tool for detecting flatness, so as to solve the problems of unstable accuracy of manual detection, high cost of large instruments and unsuitability for batch detection.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a measuring tool for detecting flatness, comprising:

[0006] A base, the surface of which is provided with a groove for positioning and loading the part to be tested;

[0007] A positioning frame is disposed on the top of the base, forming an accommodating space together with the base;

[0008] A measuring plate is installed in the receiving space. The top surface of the measuring plate is slidably engaged with the positioning frame, and the bottom surface of the measuring plate is slidably engaged with the base near the groove. A detection surface is provided on the side of the measuring plate near the groove. The detection surface is used to contact the surface of the part to be tested, and the detection surface slides in a straight line along the length or width extension direction of the groove to measure the flatness of the part to be tested.

[0009] As a preferred embodiment of a flatness measuring tool, it further includes a driving component disposed on the positioning frame for driving the measuring plate to slide along the length or width direction of the groove.

[0010] As a preferred embodiment of a flatness testing tool, the drive assembly includes a crank-connecting rod mechanism and a drive source, the drive source being mounted on the positioning frame, and the crank-connecting rod mechanism being connected between the drive source and the measuring plate.

[0011] As a preferred embodiment of a flatness measuring tool, the crank-connecting rod mechanism includes a short crank, a first slider, and a long connecting rod. The short crank is connected to the output shaft of the drive source and the first slider, respectively. The surface of the long connecting rod is provided with a first long groove, and the first slider is inserted into the first long groove and slides in cooperation with the first long groove. The surface of the positioning frame is provided with a second long groove, and the bottom of the long connecting rod is provided with a second slider. The second slider is connected to the measuring plate through the second long groove.

[0012] As a preferred embodiment of a flatness measuring tool, the direction of the first long groove is perpendicular to the direction of the second long groove, so that the measuring plate can slide along the length or width direction of the groove through orthogonal constraints.

[0013] As a preferred embodiment of a flatness testing tool, the driving source is a stepper motor. The output shaft of the stepper motor is connected to the short crank. The stepper motor is used to drive the short crank to rotate through a control pulse signal, and then drive the measuring plate to slide along the second long groove through the long connecting rod. When the measuring plate encounters abnormal resistance due to the flatness of the part to be tested, the stepper motor can detect the abnormality through a stall or step loss state feedback.

[0014] As a preferred embodiment of a flatness measuring tool, it further includes a guide rail, wherein a bracket is mounted on the slider portion of the guide rail, the bracket is connected to the positioning frame, and the guide rail is used to fix the distance of the accommodating space.

[0015] As a preferred embodiment of a flatness measuring tool, the surface of the bracket is provided with a groove for guiding the drive source, the groove being used to guide and constrain the drive source.

[0016] As a preferred embodiment of a flatness testing instrument, a vibrator is mounted on the side of the base. The vibrator is used to drive the part to be tested to fit into the groove by vibrating at a preset frequency before testing.

[0017] As a preferred embodiment of a flatness measuring tool, the inner wall of the groove serves as a positioning reference surface, which is in contact with the outer peripheral wall of the part to be tested, thereby limiting the displacement of the part within the groove.

[0018] The beneficial effects of this utility model are as follows: the part to be tested is positioned by the groove of the base, and the sliding cooperation between the positioning frame and the measuring plate makes the detection surface of the measuring plate slide stably along the groove direction and fit against the surface of the part; the changes in the contact state between the measuring plate and the surface of the part (such as jamming and gap) intuitively reflect the unevenness of the surface of the part, thereby realizing the rapid detection of the flatness of the part, simplifying the complex structure of traditional testing equipment, and improving the detection efficiency and ease of operation. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure in the first direction of a flatness measuring tool provided by this utility model;

[0020] Figure 2 A schematic diagram of the overall structure in the second direction of a flatness measuring tool provided by this utility model;

[0021] Figure 3 A bottom view of a flatness measuring tool provided by this utility model, with the base removed;

[0022] Figure 4 A schematic diagram of the overall structure of the base in a flatness measuring tool provided by this utility model;

[0023] Figure 5 An exploded view of the crank connecting rod in a flatness measuring tool provided by this utility model.

[0024] The following are the labeling elements in the figure:

[0025] 1. Base; 2. Positioning frame; 3. Measuring plate; 4. Groove; 5. Accommodation space; 6. Detection surface; 7. Drive assembly;

[0026] 701. Crank-connecting rod mechanism; 711. Short crank; 712. First slider; 713. Long connecting rod; 714. First long slot; 715. Second long slot; 716. Second slider;

[0027] 702. Driver source;

[0028] 8. Guide rail; 9. Bracket; 10. Slide groove; 11. Vibrator; 12. Positioning reference surface. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0033] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0034] In one embodiment of this utility model, such as Figure 1-5 As shown, a flatness measuring tool is provided, comprising: a base 1, a positioning frame 2, and a measuring plate 3. The base 1 has a groove 4 on its surface for positioning and loading the part to be inspected. The positioning frame 2 is disposed on the top of the base 1, forming a receiving space 5 together with the base 1. The measuring plate 3 is installed within the receiving space 5, with its top surface slidingly engaged with the positioning frame 2 and its bottom surface slidingly engaged with the base 1 near the groove 4. A detection surface 6 is provided on the side of the measuring plate 3 near the groove 4, which contacts the surface of the part to be inspected. The detection surface 6 slides linearly along the length or width of the groove 4 to measure the flatness of the part to be inspected.

[0035] The flatness testing tool provided by this utility model positions the part to be tested through the groove 4 of the base 1. Combined with the sliding cooperation between the positioning frame 2 and the measuring plate 3, the testing surface 6 of the measuring plate 3 slides stably along the groove 4 and fits against the surface of the part. By observing the changes in the contact state between the measuring plate 3 and the surface of the part (such as jamming or gaps), the unevenness of the part surface is intuitively reflected, thereby realizing the rapid detection of the flatness of the part. This simplifies the complex structure of traditional testing equipment and improves the testing efficiency and ease of operation.

[0036] Preferably, the inner wall of the groove 4 is a positioning reference surface 12, which fits against the outer peripheral wall of the part to be tested, thereby limiting the horizontal displacement of the part in the groove 4 and preventing the part from shifting during testing; thus ensuring that the contact position between the testing surface 6 of the measuring plate 3 and the surface of the part is stable, reducing the testing error caused by the shaking of the part, and improving the accuracy of flatness testing.

[0037] The flatness testing instrument also includes a drive component 7, which is mounted on the positioning frame 2 and used to drive the measuring plate 3 to slide along the length or width of the groove 4. The drive component 7 on the positioning frame 2 allows the measuring plate 3 to slide automatically along the length or width of the groove 4, replacing manual pushing; thus avoiding problems such as uneven force and unstable speed caused by manual operation, ensuring a uniform and stable testing process, improving the consistency and efficiency of flatness testing, and reducing manual labor intensity.

[0038] Specifically, the drive assembly 7 includes a crank-connecting rod mechanism 701 and a drive source 702. The drive source 702 is mounted on the positioning frame 2, and the crank-connecting rod mechanism 701 connects the drive source 702 and the measuring plate 3. Through the cooperation of the drive source 702 and the crank-connecting rod mechanism 701, the rotational motion of the drive source 702 is converted into the smooth linear sliding of the measuring plate 3, resulting in more uniform force transmission and improved automation.

[0039] Furthermore, the crank-connecting rod mechanism 701 includes a short crank 711, a first slider 712, and a long connecting rod 713. The short crank 711 is connected to the output shaft of the drive source 702 and the first slider 712, respectively. The surface of the long connecting rod 713 is provided with a first long groove 714. The first slider 712 is inserted into the first long groove 714 and slides in cooperation with the first long groove 714. The surface of the positioning frame 2 is provided with a second long groove 715. The bottom of the long connecting rod 713 is provided with a second slider 716. The second slider 716 is connected to the measuring plate 3 through the second long groove 715. Through the cooperation of the short crank 711, the first slider 712 and the first long groove 714 of the long connecting rod 713, combined with the sliding constraint of the second slider 716 at the bottom of the long connecting rod 713 and the second long groove 715 of the positioning frame 2, the rotational motion of the drive source 702 is transformed into the precise linear sliding of the measuring plate 3 through double guidance; thereby avoiding transmission deviation, ensuring that the measuring plate 3 moves stably along the set trajectory, improving the accuracy and consistency of flatness detection, reducing mechanical wear and extending the equipment life.

[0040] Furthermore, the direction of the first long groove 714 is perpendicular to the direction of the second long groove 715, so that the measuring plate 3 can slide along the length or width direction of the groove 4 through orthogonal constraint. Through the perpendicular orthogonal constraint of the first long groove 714 and the second long groove 715, the power transmission direction of the crank connecting rod mechanism 701 is precisely defined, and the measuring plate 3 can only slide along the length or width direction of the groove 4; thereby avoiding lateral offset during transmission, ensuring that the detection surface 6 always contacts the part surface along the set path, and improving the directional accuracy and reliability of the flatness detection results.

[0041] Preferably, the drive source 702 is a stepper motor. The output shaft of the stepper motor is connected to a short crank 711. The stepper motor drives the short crank 711 to rotate via control pulse signals, which in turn drives the measuring plate 3 to slide along the second long groove 715 via the long connecting rod 713. When the measuring plate 3 encounters abnormal resistance due to the flatness of the part to be inspected, the stepper motor can detect the abnormality by showing a stall or step loss state. By connecting the stepper motor to the short crank 711, controlling the rotation with pulse signals to drive the measuring plate 3 to slide, and providing feedback on abnormal resistance through stall or step loss, the power output is precise and controllable, and the abnormality can be identified. This achieves smooth drive and rapid defect response, improves the degree of automation in inspection, reduces human judgment errors, and ensures the accuracy and efficiency of flatness inspection.

[0042] This flatness testing tool also includes a guide rail 8, with a bracket 9 mounted on the slider of the guide rail 8. The bracket 9 is connected to the positioning frame 2, and the guide rail 8 is used to fix the distance of the accommodating space 5. By connecting the slider of the guide rail 8 to the positioning frame 2 via the bracket 9, the distance of the accommodating space 5 is fixed, ensuring that the fit clearance between the measuring plate 3 and the base 1 and positioning frame 2 remains stable. This avoids the measuring plate 3 from sliding, jamming, or shifting due to changes in space, ensuring that the contact state between the testing surface 6 and the part surface is consistent, and improving the stability and repeatability accuracy of flatness testing.

[0043] Preferably, the surface of the bracket 9 is provided with a groove 10 for guiding the drive source 702. The groove 10 is used to guide and constrain the drive source 702. By guiding and constraining the drive source 702 through the groove 10 on the surface of the bracket 9, the transmission components of the drive source 702 move along a preset trajectory, avoiding interference caused by deviation; thereby ensuring a stable power transmission path, reducing interference with the sliding of the measuring plate 3, ensuring uniform contact between the detection surface 6 and the part surface, and improving the accuracy of flatness detection and the smoothness of equipment operation.

[0044] Preferably, a vibrator 11 is installed on the side of the base 1. The vibrator 11 on the side of the base 1 vibrates at a preset frequency, so that the part to be tested is fully attached to the groove 4 before testing, eliminating the placement gap; thereby ensuring that the positioning reference of the part is uniform, avoiding the deviation of the contact position of the measuring plate 3 due to the loosening of the part, improving the consistency of the reference and the accuracy of the results of flatness testing, and reducing the impact of human placement error.

[0045] 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 changes or modifications 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 modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A measuring tool for detecting flatness, characterized in that, include: A base, the surface of which is provided with a groove for positioning and loading the part to be tested; A positioning frame is disposed on the top of the base, forming an accommodating space together with the base; A measuring plate is installed in the receiving space. The top surface of the measuring plate is slidably engaged with the positioning frame, and the bottom surface of the measuring plate is slidably engaged with the base near the groove. A detection surface is provided on the side of the measuring plate near the groove. The detection surface is used to contact the surface of the part to be tested, and the detection surface slides in a straight line along the length or width extension direction of the groove to measure the flatness of the part to be tested.

2. The flatness measuring tool according to claim 1, characterized in that, It also includes a drive component, disposed on the positioning frame, for driving the measuring plate to slide along the length or width direction of the groove.

3. The flatness measuring tool according to claim 2, characterized in that, The drive assembly includes a crank-connecting rod mechanism and a drive source. The drive source is mounted on the positioning frame, and the crank-connecting rod mechanism is connected between the drive source and the measuring plate.

4. The flatness measuring tool according to claim 3, characterized in that, The crank-connecting rod mechanism includes a short crank, a first slider, and a long connecting rod. The short crank is connected to the output shaft of the drive source and the first slider, respectively. The surface of the long connecting rod is provided with a first long groove. The first slider is inserted into the first long groove and slides into the first long groove. The surface of the positioning frame is provided with a second long groove. The bottom of the long connecting rod is provided with a second slider. The second slider is connected to the measuring plate through the second long groove.

5. A flatness measuring tool according to claim 4, characterized in that, The direction of the first long groove is perpendicular to the direction of the second long groove, so that the measuring plate can slide along the length or width direction of the groove through orthogonal constraints.

6. A flatness measuring tool according to claim 4 or 5, characterized in that, The driving source is a stepper motor. The output shaft of the stepper motor is connected to the short crank. The stepper motor is used to drive the short crank to rotate through the control pulse signal, and then drive the measuring plate to slide along the second long groove through the long connecting rod. When the measuring plate is subjected to abnormal resistance due to the flatness of the part to be tested, the stepper motor can detect the abnormality through stall or step loss.

7. A flatness measuring tool according to any one of claims 1-5, characterized in that, It also includes a guide rail, the slider portion of which is equipped with a bracket, the bracket being connected to the positioning frame, and the guide rail being used to fix the distance of the accommodating space.

8. A flatness measuring tool according to claim 7, characterized in that, The surface of the bracket is provided with a groove for guiding the drive source, and the groove is used to guide and constrain the drive source.

9. A flatness measuring tool according to any one of claims 1-5, characterized in that, A vibrator is mounted on the side of the base. The vibrator is used to drive the part to be tested to fit into the groove by vibrating at a preset frequency before testing.

10. A flatness measuring tool according to claim 1, characterized in that, The inner wall of the groove serves as a positioning reference surface, which is in contact with the outer peripheral wall of the part to be tested, thereby limiting the displacement of the part within the groove.

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