A sample testing device

Abstract

The utility model discloses a kind of sample detection devices, including horizontal workbench and the detection mechanism being set on it. The detection mechanism includes stand, moving assembly and measuring assembly. Among them, moving assembly can be vertically moved along the axial direction of stand, measuring assembly is rotatably arranged on moving assembly, so that it can adjust the included angle formed between it and workbench mesa axis. Measuring assembly can be abutted with sample placed on workbench in the process of vertical movement and / or rotation, so as to realize the detection of sample flatness and straightness. The device is stable in structure, easy to operate, through the cooperation of moving and rotating function, the error caused by manual operation can be effectively avoided, and the detection accuracy and efficiency are improved.

Description

Technical Field

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

[0002] Flatness and straightness are key geometric tolerance indicators for evaluating the machining quality of mechanical parts, molds, sheet metal, and other workpieces. Traditional inspection methods typically rely on precision measuring tools (such as feeler gauges, knife-edge rulers, and levels) or large coordinate measuring machines (CMMs). Among these, using tools such as knife-edge rulers and straightedges in conjunction with the optical gap method is a relatively common manual method. The principle is to place the measuring edge of the ruler in contact with the surface being measured, and judge the error by observing the size and shape of the gap transmitted through the light from the back.

[0003] However, existing manual inspection methods of this kind have significant shortcomings: First, the inspection process heavily relies on the operator's experience and skills, requires high visual observation skills, and is highly subjective with poor consistency. Second, it is difficult to maintain stability when manually holding the measuring instrument, and measurement errors are easily introduced due to shaking or uneven force, affecting the accuracy and repeatability of the inspection. Third, adjusting the inspection angle and height is inconvenient, and for features to be measured in different positions and directions, it is necessary to repeatedly place the workpiece or change tools, which is inefficient. In addition, when the ambient light is insufficient or the lighting angle is poor, it is difficult to clearly observe tiny light gaps, affecting the reliability and sensitivity of the inspection. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a sample testing device. To achieve the aforementioned objective, this utility model adopts the following technical solution: A sample testing device, comprising: A horizontally positioned workbench is used to place the test sample. The testing mechanism, set on the workbench, includes: A column vertically fixed to the workbench; A movable component is connected to the column in a manner that allows it to move vertically along the axial direction of the column; The measuring component is rotatably mounted on the movable component, allowing the measuring component to adjust the angle between itself and the axis of the worktable surface. The measuring component can come into contact with the sample during vertical movement and / or rotation to detect the flatness and straightness of the sample.

[0005] Furthermore, the column is provided with an inwardly recessed receiving cavity. The detection mechanism further includes a rotating part, which is arranged along the axial direction of the column and located within the receiving cavity, allowing it to rotate along the column. The movable component is sleeved on the rotating part and is allowed to engage with the rotating part in a threaded manner, so that the movable component is driven to move during the rotation of the rotating part.

[0006] Furthermore, the moving component includes a slider disposed within the receiving cavity and abutting against the column on both sides, and a connecting seat disposed on the slider for connecting with the measuring component.

[0007] Furthermore, the connecting seat includes a connecting plate disposed on the slider in a corresponding manner, and a connecting shaft with its two ends respectively disposed on the connecting plate. A connection hole is provided at the end of the measuring component, and the connection hole is fitted onto the connecting shaft so that the measuring component can rotate along the connecting shaft.

[0008] Furthermore, the measuring component is configured as a strip-shaped structure, with its thickness gradually increasing from one side that abuts against the sample to the other, so that the measuring component and the sample can abut against each other in a line contact manner.

[0009] Furthermore, the device also includes an illumination assembly configured to allow a light beam to be emitted toward the sample, thereby making the gap between the sample and the measuring assembly visible.

[0010] Furthermore, the lighting components include: A support column is set on the workbench and extends upward, such that the radial extension line of the support column is perpendicular to the radial extension line of the upright column. A motion component is connected to the support column in a manner that allows it to move vertically along the axis of the support column; A light emitting unit is mounted on the moving component, and its light direction is directed toward the measuring component.

[0011] Furthermore, the support pillar has an inwardly recessed chamber. The lighting assembly also includes a pivot shaft arranged along the axial direction of the support column and located within the cavity, allowing it to rotate along the support column. The motion component is sleeved on the rotating shaft and is allowed to be threaded together with the rotating shaft so that the motion component is driven to move during the rotation of the rotating shaft.

[0012] Furthermore, the light emitting unit is configured as any lighting device capable of zooming.

[0013] Furthermore, the device also includes a drive unit selectively disposed on the rotating part and / or the rotating shaft, the drive unit being configured to allow rotation of the rotating part and / or the rotating shaft.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Achieves highly sensitive and stable line contact detection, improving detection accuracy and reliability: By setting up a horizontal worktable and a detection mechanism on it, which includes a vertically fixed column, a movable component that can move precisely vertically along the column axis, and a measuring component rotatably mounted on the movable component, a stable and adjustable detection benchmark is constructed. This device replaces the traditional method of manually holding a ruler. The measuring component uses its movement and rotation functions to contact the sample for detection, eliminating the influence of human shaking or uneven force on the measurement results, ensuring the stability and consistency of the measurement process, thereby improving the accuracy and reliability of flatness and straightness detection.

[0015] 2. It enables convenient and precise adjustment of the detection angle and height, enhancing the adaptability and ease of operation of the device: The measuring component can be adjusted to the angle formed between itself and the axis of the worktable, eliminating the need for the operator to repeatedly move or reposition the sample. Simultaneously, the cooperation between the rotating part and the moving component allows for stepless and precise adjustment of the measuring component's height, facilitating quick and easy control of contact pressure and locating the optimal measurement point. This design improves the efficiency and flexibility of the detection process, overcoming the shortcomings of traditional methods such as inconvenient adjustments and cumbersome tool changes.

[0016] 3. The microscopic gaps are made explicit, reducing reliance on operator experience and enhancing the objectivity and intuitiveness of judgment: By setting up the illumination component, a bright, focusable beam can be precisely projected behind the contact area between the measuring edge and the sample surface. This backlighting transforms micron-level light-transmitting gaps into bright, clearly visible light bands, making deviations in flatness or straightness appear as intuitive optical images. This reduces the stringent requirements on the operator's visual observation abilities, minimizes subjective judgment errors, and makes the test results more objective, easier to identify and evaluate, especially improving the problem of insufficient detection sensitivity under ordinary ambient light. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the sample testing device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the detection mechanism according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the overall structure of the lighting assembly according to an embodiment of the present utility model.

[0018] In the attached drawings: sample testing device 100, workbench 1, testing mechanism 2, column 21, receiving cavity 211, moving component 22, slider 221, connecting seat 222, connecting plate 2221, connecting shaft 2222, measuring component 23, connecting hole 231, rotating part 24, lighting component 3, support column 31, chamber 311, motion component 32, light emitting part 33, rotating shaft 34. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] To better understand the purpose, structure, and function of this utility model, the following detailed description of a sample testing device of this utility model is provided in conjunction with the accompanying drawings.

[0021] Figure 1 The illustration schematically shows a sample testing device according to the present invention. In such a way... Figure 1 In the illustrated embodiment, the sample testing device 100 includes a horizontally arranged worktable 1 for placing the sample to be tested. A testing mechanism 2 is provided on the worktable 1. The testing mechanism 2 includes a column 21 vertically fixed to the worktable 1, a moving component 22, and a measuring component 23.

[0022] Among them, such as Figure 1 As shown, the movable component 22 is connected to the column 21 in a manner that allows it to move vertically along the axis of the column 21. The measuring component 23 is rotatably mounted on the movable component 22. In this manner, the measuring component 23 can adjust the angle formed between itself and the axis of the worktable 1. With this arrangement, the measuring component 23 can come into contact with the sample on the worktable 1 during vertical movement and / or rotation to detect the flatness and straightness of the sample.

[0023] In one embodiment, such as Figure 1 , 2 As shown, a recessed receiving cavity 211 is provided on the column 21. The detection mechanism 2 also includes a rotating part 24, which is arranged along the axial direction of the column 21 and located within the receiving cavity 211, and can rotate about its own axis. A moving component 22 is sleeved on the rotating part 24 and is allowed to be threadedly engaged with the rotating part 24, so that the moving component 22 is driven to move along the axial direction of the column 21 during the rotation of the rotating part 24.

[0024] Specifically, in this configuration, when the detection height of the measuring component 23 needs to be adjusted, the operator can manually or via a drive mechanism rotate the rotating part 24. Since the moving component 22 is threaded onto the rotating part 24 and is guided and restricted by the receiving cavity 211, the rotational motion of the rotating part 24 is converted into the linear lifting motion of the moving component 22, thereby driving the measuring component 23 fixed thereon to the preset detection position.

[0025] In the illustrated embodiment, such as Figure 2 As shown, the moving component 22 includes a slider 221 disposed within the receiving cavity 211 and abutting against the inner wall of the column 21 on both sides, and a connecting seat 222 disposed on the slider 221 for connecting with the measuring component 23. The cooperation between the slider 221 and the receiving cavity 211 ensures that the moving component 22 can only move smoothly in the vertical direction, preventing radial sway and improving positioning accuracy.

[0026] According to one embodiment of the present invention, such as Figure 2 As shown, the connecting seat 222 includes a connecting plate 2221 disposed opposite to the slider 221, and a connecting shaft 2222 fixed at both ends to the connecting plate 2221. A connecting hole 231 is provided at the end of the measuring component 23, and the connecting hole 231 is sleeved on the connecting shaft 2222, so that the measuring component 23 can rotate around the connecting shaft 2222.

[0027] Specifically, in this connection method, the measuring component 23 can be adjusted to adjust the angle between itself and the axis of the worktable 1. When it is necessary to test the inclined surface of the sample, the operator can easily rotate the measuring component 23 manually to adjust its relative angle with the sample to make the working surface of the measuring component 23 form a suitable contact state with the edge of the sample to be tested.

[0028] In a preferred embodiment, such as Figure 2 As shown, the measuring component 23 is configured as a strip-shaped plate structure. Its thickness gradually increases from the measuring side, which is used to contact the sample, towards the back side, forming a wedge-shaped cross-section. This allows the measuring component 23 to achieve line contact with the sample surface with its sharp measuring edges when it contacts the sample.

[0029] Compared to surface contact, this line contact method offers higher detection sensitivity. When the sample has minor flatness deviations or straightness defects, a visible light gap will form between the measuring edge and the sample surface, making it easier for the operator to observe and judge.

[0030] According to a preferred embodiment of the present invention, such as Figure 2As shown, an elastic ring (not shown) is also provided on the connecting shaft 2222. The elastic ring is configured to be interference-fitted with the connecting hole 231 so that the operator needs to overcome the deformation of the elastic ring when rotating the measuring component 23. This prevents the measuring component 23 from shifting after contacting the sample. In this embodiment, the elastic ring is made of rubber.

[0031] According to one embodiment of the present invention, such as Figure 1 , 3 As shown, the apparatus 100 also includes an illumination assembly 3. The illumination assembly 3 is configured to emit a light beam toward the sample, thereby making the gap between the sample and the measuring assembly 23 visible. The illumination assembly 3 includes a support column 31, a motion assembly 32, and a light emitting section 33. The support column 31 is mounted on the worktable 1 and extends upward, with the axis of the support column 31 perpendicular to the projection of the axis of the column 21 onto the horizontal plane. The motion assembly 32 is connected to the support column 31 in a manner capable of vertical movement along the axial direction of the support column 31. The light emitting section 33 is mounted on the motion assembly 32 and directs its illumination toward the contact area between the measuring assembly 23 and the sample.

[0032] In one embodiment, such as Figure 3 As shown, a recessed chamber 311 is provided on the support column 31. The lighting assembly 3 also includes a rotating shaft 34, which is arranged along the axial direction of the support column 31 and located within the chamber 311, and is capable of rotating about its own axis. A motion assembly 32 is sleeved on the rotating shaft 34 and is allowed to be threadedly engaged with the rotating shaft 34, so that the motion assembly 32 is driven to move along the axial direction of the support column 31 during the rotation of the rotating shaft 34.

[0033] Specifically, in this configuration, the operator can rotate the shaft 34 to precisely adjust the vertical height of the light emitting unit 33 via threaded transmission, thereby accurately projecting the light beam onto the edge position where the measuring component 23 contacts the sample. The light beam illuminates from the back of the measuring component 23. When a gap exists between the measuring edge and the sample surface, the light passes through the gap, forming a bright light band, making even micron-level gaps clearly visible, thus improving the intuitiveness and accuracy of the detection.

[0034] In one embodiment, such as Figure 3 As shown, the light emitting unit 33 is configured as any zoomable lighting device, such as an adjustable-focus LED flashlight or spotlight. By adjusting the focal length, the light beam can be focused into a narrow and bright strip of light, accurately illuminating the detection area, and the illumination range can be flexibly adjusted according to the size of different samples and detection requirements.

[0035] According to one embodiment of the present invention, such as Figure 1As shown, the device 100 also includes a drive unit (not shown in the figure). The drive unit may be selectively disposed on the rotating part 24 and / or the rotating shaft 34. The drive unit is configured to allow the rotating part 24 and / or the rotating shaft 34 to rotate. In this embodiment, the drive unit may be a manual knob, a stepper motor, or a servo motor, etc. When configured as a motor drive, it can also be connected to a control system to realize automatic and precise control of the detection height and lighting height, further improving detection efficiency and automation level.

[0036] The operation of the sample testing device 100 according to this utility model is as follows.

[0037] First, place the sample to be tested stably on the horizontal worktable 1. Based on the approximate position of the sample's characteristics to be measured (such as edge straightness or surface flatness), manually rotate the measuring component 23 around the connecting shaft 2222 until its wedge-shaped measuring edge is approximately parallel to the direction to be measured.

[0038] Then, adjust the height of the measuring component 23. By rotating the rotating part 24 inside the rotating column 21 (manually or via the drive part), drive the moving component 22 and the measuring component 23 to descend vertically until the measuring edge of the measuring component 23 approaches but does not contact the sample surface.

[0039] Next, fine-tuning and testing are performed. The height of the measuring component 23 is slowly lowered or finely adjusted while observing the contact between the measuring edge and the sample surface. The illumination component 3 is turned on, and the height and focal length of the light emitting unit 33 are adjusted so that the light beam is projected from behind the measuring component 23 onto the contact area. The rotating unit 24 is slowly rotated manually or using the drive unit to slowly lower the measuring component 23.

[0040] When the measuring edge contacts the highest point of the sample surface, the light is blocked. At this time, the operator can observe the change in the light gap in the contact area. If the sample is completely flat, the light gap will be uniform or completely dark; if there are unevenness, an uneven light band will appear, and the width and shape of the light band directly reflect the deviation in straightness or flatness.

[0041] After the test is completed, the rotating part 24 is reversed to raise the measuring component 23 and remove the sample, thus completing one test operation. Through the above structural design and operation process, the sample testing device of this utility model achieves rapid, intuitive, and highly sensitive testing of the flatness and straightness of the sample.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A sample testing device, characterized in that, include: A horizontally set workbench (1) is used to place the test sample; The testing mechanism (2) is disposed on the workbench (1), and the testing mechanism (2) includes: The column (21) is vertically fixed to the workbench (1); The movable component (22) is connected to the column (21) in a manner that allows it to move vertically along the axis of the column (21); The measuring component (23) is rotatably mounted on the moving component (22) so that the measuring component (23) can adjust the angle between itself and the axis of the worktable (1); The measuring component (23) can come into contact with the sample during vertical movement and / or rotation to detect the flatness and straightness of the sample.

2. The sample testing device according to claim 1, characterized in that, An inwardly recessed receiving cavity (211) is provided on the column (21). The detection mechanism (2) further includes a rotating part (24), which is arranged along the axial direction of the column (21) and located within the receiving cavity (211), and is allowed to rotate along the column (21). The movable component (22) is sleeved on the rotating part (24) and is allowed to be threaded together with the rotating part (24) so ​​that the movable component (22) is driven to move during the rotation of the rotating part (24).

3. The sample testing device according to claim 2, characterized in that, The moving component (22) includes a slider (221) disposed in the receiving cavity (211) and abutting against the column (21) on both sides respectively, and a connecting seat (222) disposed on the slider (221) for connecting with the measuring component (23).

4. The sample testing device according to claim 3, characterized in that, The connecting seat (222) includes a connecting plate (2221) disposed on the slider (221) in a corresponding manner, and a connecting shaft (2222) disposed at both ends on the connecting plate (2221). A connecting hole (231) is provided at the end of the measuring component (23), and the connecting hole (231) is sleeved on the connecting shaft (2222) so that the measuring component (23) can rotate along the connecting shaft (2222).

5. The sample testing device according to claim 4, characterized in that, The measuring component (23) is configured as a strip plate structure, and its thickness gradually increases from the side that it abuts against the sample to the other side, so that the measuring component (23) and the sample can abut against each other in a line contact manner.

6. The sample testing device according to claim 5, characterized in that, The device (100) also includes an illumination assembly (3) configured to allow a light beam to be emitted toward the sample to make the gap between the sample and the measuring assembly (23) visible.

7. The sample testing device according to claim 6, characterized in that, The lighting component (3) includes: The support (31) is set on the workbench (1) and extends upward, such that the radial extension of the support (31) is perpendicular to the radial extension of the column (21). The motion component (32) is connected to the support column (31) in a manner that allows it to move vertically along the axis of the support column (31); The light emitting part (33) is disposed on the motion component (32) and its light emitting direction is directed toward the measuring component (23).

8. The sample testing device according to claim 7, characterized in that, An inwardly recessed chamber (311) is provided on the support column (31). The lighting assembly (3) also includes a pivot (34) which is arranged axially along the support column (31) and located within the chamber (311), allowing it to rotate along the support column (31). The motion component (32) is sleeved on the rotating shaft (34) and is allowed to be threaded together with the rotating shaft (34) so ​​that the motion component (32) is driven to move during the rotation of the rotating shaft (34).

9. The sample testing device according to claim 8, characterized in that, The light emitting unit (33) is configured as an arbitrary lighting device capable of zooming.

10. The sample testing device according to claim 9, characterized in that, The device (100) also includes a drive unit selectively disposed on the rotating part (24) and / or the rotating shaft (34), the drive unit being configured to allow the rotating part (24) and / or the rotating shaft (34) to rotate.

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