A flatness measuring device

Abstract

This utility model discloses a flatness measuring device, belonging to the field of mechanical measurement technology. It includes: a gantry-type support, a moving component, and a measuring component. The gantry-type support includes two vertical frames and a horizontal frame perpendicular to the vertical frames, with both ends of the horizontal frame connected to the two vertical frames respectively. A leveling plate is provided at the bottom of each vertical frame. The moving component includes a slider, which is slidably engaged with the horizontal frame. The measuring component includes a connecting plate, a measuring gauge for measuring flatness, and a coarse adjustment unit. The connecting plate and the slider are connected through the coarse adjustment unit, which can adjust the distance between the connecting plate and the slider. The measuring gauge is detachably connected to the connecting plate. This utility model ensures both measurement accuracy and improves measurement efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mechanical measurement technology, and in particular to a flatness measuring device. Background Technology

[0002] In industrial production, flatness measurement is a crucial quality control step. Currently used flatness measurement equipment suffers from the following problems: On the one hand, while high-precision coordinate measuring machines (CMMs) and laser scanners offer high measurement accuracy, they are expensive to purchase, complex to operate and maintain, and bulky, making them inconvenient for on-site use. On the other hand, while traditional flat plate feeler gauge measurement methods are simple and easy to implement, they suffer from low accuracy and inefficiency, failing to meet the precision requirements of modern industry. Utility Model Content

[0003] In view of this, it is necessary to provide a flatness measuring device to solve the problems of poor measurement accuracy and low efficiency of existing flatness measuring instruments.

[0004] This utility model provides a flatness measuring device, comprising: A portal frame includes two vertical frames and a horizontal frame perpendicular to the vertical frames. The two ends of the horizontal frame are respectively connected to the two vertical frames. A leveling plate is provided at the bottom of the vertical frames. A movable component, the movable component including a slider, the slider being slidably engaged with the crossbeam; The measuring assembly includes a connecting plate, a measuring gauge for measuring flatness, and a coarse adjustment unit. The connecting plate and the slider are connected through the coarse adjustment unit, which can adjust the distance between the connecting plate and the slider. The measuring gauge is detachably connected to the connecting plate.

[0005] Furthermore, the coarse adjustment unit includes a first connecting hole, which is an elongated hole. The first connecting hole is opened on the connecting plate, and bolts pass through different positions of the first connecting hole to connect with the slider, so as to adjust the distance between the connecting plate and the slider.

[0006] Furthermore, the coarse adjustment unit includes a second connecting hole, and a plurality of second connecting holes are arranged in an opposite array. The second connecting holes are opened on the slider, and bolts pass through the connecting plate and connect to different second connecting holes to adjust the distance between the connecting plate and the slider.

[0007] Furthermore, the measuring assembly also includes a fine adjustment unit. The measuring instrument is connected to the connecting plate through the fine adjustment unit. The fine adjustment unit includes a fixing sleeve and a fastening bolt that are fixedly connected to the connecting plate. The measuring instrument is inserted into the fixing sleeve at different depths, and the fastening bolt abuts against the measuring instrument through the fixing sleeve.

[0008] Furthermore, the moving component also includes a moving unit, which includes a lead screw and a nut seat. The two ends of the lead screw are connected to the cross frame via brackets, and one end of the nut seat is connected to the connecting plate. The nut seat is threadedly connected to the lead screw.

[0009] Furthermore, the moving unit also includes a handwheel, which is rotatably connected to the lead screw.

[0010] Furthermore, the measuring instrument is a dial indicator or a lever indicator.

[0011] Furthermore, the bottom of the finding plate is provided with a finding plane for adapting to the reference plane, and the top of the finding plate is fixedly connected to the vertical frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) A flatness measuring device of this utility model is provided with a moving component and a measuring component. The moving component includes a slider, which is slidably engaged with a crossbeam. The slider can move along the crossbeam along a preset trajectory. The measuring component includes a connecting plate, a measuring gauge for measuring flatness, and a coarse adjustment unit. The connecting plate and the slider are connected through the coarse adjustment unit, which can adjust the distance between the connecting plate and the slider. The measuring gauge is detachably connected to the connecting plate. The coarse adjustment unit can adjust the distance between the measuring gauge and the reference plane, thereby adjusting the degree of contact between the measuring head of the measuring gauge and the plane of the part to be measured as needed. By combining the slider and the measuring gauge, continuous multi-point measurement can be achieved, significantly improving the detection efficiency. The slider drives the measuring gauge to move stably along a predetermined trajectory, improving the detection accuracy.

[0013] (2) A flatness measuring device of this utility model is provided with a portal frame, which includes two vertical frames and a horizontal frame perpendicular to the vertical frames. The two ends of the horizontal frame are connected to the two vertical frames respectively. The horizontal frame and the vertical frames are combined to form a portal structure, which is stable and has high support strength. The bottom of the vertical frame is provided with a leveling plate, which can cooperate with the reference plane to keep the overall level of the device. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the moving component and the measuring component in this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the structure of the moving component and the measuring component in this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the measuring component in this utility model. Figure 1 ; Figure 6 This is a schematic diagram of the measuring component in this utility model. Figure 2 ; Figure 7 This is a schematic diagram of the fine adjustment unit in this utility model.

[0015] In the diagram, 100 is a portal frame; 110 is a vertical frame; 111 is a flat plate; and 120 is a horizontal frame. 200. Moving component; 210. Slider; 220. Moving unit; 221. Lead screw; 222. Nut seat; 223. Handwheel; 300. Measuring component; 310. Connecting plate; 320. Measuring gauge; 330. Coarse adjustment unit; 331. First connecting hole; 332. Second connecting hole; 340. Fine adjustment unit; 341. Fixing sleeve; 342. Fastening bolt. Detailed Implementation

[0016] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0017] The flatness measuring device in this embodiment relates to the field of mechanical measurement technology. With the help of the moving unit 220 and the support unit, the device as a whole can be kept in a standard measuring posture, effectively eliminating the measurement data deviation caused by the tilt of the device, and improving the accuracy and efficiency of flatness detection.

[0018] Please see Figures 1 to 7This embodiment of a flatness measuring device includes a portal frame 100, a moving component 200, and a measuring component 300. The measuring component 300 can measure the height at different positions on a plane. The moving component 200 can guide the measuring component 300 to move stably along a predetermined trajectory, and the measurement can represent linear data representing flatness. The portal frame 100 can both support the moving component 200 and the measuring component 300, and also provide a positioning base.

[0019] The portal frame 100 includes two vertical frames 110 and a horizontal frame 120 perpendicular to the vertical frames 110. Both ends of the horizontal frame 120 are connected to the two vertical frames 110 respectively. The horizontal frame 120 and the vertical frames 110 combine to form a portal structure, which is structurally stable and has high support strength. A leveling plate 111 is provided at the bottom of the vertical frame 110. The leveling plate 111 can mate with a reference plane to maintain the overall levelness of the device.

[0020] The moving component 200 includes a slider 210, which is slidably engaged with the crossbeam 120. The slider 210 can move along the crossbeam 120 along a preset trajectory. The measuring component 300 includes a connecting plate 310, a measuring gauge 320 for measuring flatness, and a coarse adjustment unit 330. The connecting plate 310 and the slider 210 are connected by the coarse adjustment unit 330, which can adjust the distance between the connecting plate 310 and the slider 210. The measuring gauge 320 is detachably connected to the connecting plate 310. The coarse adjustment unit 330 can adjust the distance between the measuring gauge 320 and the reference plane, thereby adjusting the degree of contact between the measuring head of the measuring gauge 320 and the plane of the part to be measured as needed. By combining the slider 210 and the measuring gauge 320, continuous multi-point measurement can be achieved, significantly improving inspection efficiency. The slider 210 drives the measuring gauge 320 to move stably along a predetermined trajectory, improving inspection accuracy.

[0021] During operation, the leveling plate 111 should be aligned with the reference plane to ensure the device is horizontal. Push the slider 210 along the crossbeam 120 to the position to be measured. Adjust the relative distance between the connecting plate 310 and the slider 210 using the coarse adjustment unit 330, so that the measuring instrument 320 contacts the surface being measured. The measuring instrument 320 is detachably fixed to the connecting plate 310, facilitating the replacement of measuring tools with different ranges or types. When multiple measurements are required, the slider 210 can be slid to move the measuring instrument 320 along the crossbeam 120, and the adjustment function of the coarse adjustment unit 330 can be used to quickly locate the measurement points.

[0022] In some embodiments, please refer to Figure 5The coarse adjustment unit 330 includes a first connecting hole 331, which is an elongated hole located on the connecting plate 310. A screw hole is provided on the slider 210. Bolts pass through different positions of the first connecting hole 331 and connect to the screw holes of the slider 210, thus fixing the connecting plate 310 to the slider 210. By adjusting the bolts to fit different positions of the first connecting hole 331, the distance between the connecting plate 310 and the slider 210 can be adjusted, allowing the measuring head of the measuring instrument 320 to be adapted to parts of different heights.

[0023] In the specific implementation process, the first connecting hole 331 is an elongated hole opened along the length of the connecting plate 310, which can be achieved by milling. The bolt can be adjusted in position along the first connecting hole 331, thereby changing the overlapping area of ​​the connecting plate 310 and the slider 210, and thus changing the distance between the bottom of the connecting plate 310 and the plane to be measured.

[0024] When it is necessary to adjust the distance between the measuring instrument 320 and the plane to be measured, the operator can loosen the bolts, adjust the connecting plate 310 to move along the first connecting hole 331 to the appropriate position, and then tighten the bolts 342 to achieve stepless adjustment of the distance between the connecting plate 310 and the plane to be measured.

[0025] In some embodiments, please refer to Figure 6 The coarse adjustment unit 330 includes a second connecting hole 332. Multiple second connecting holes 332 are arranged in a relative array. The second connecting holes 332 are opened on the slider 210. Bolts pass through the connecting plate 310 and connect to different second connecting holes 332 of the slider 210. Through the cooperation of the array of second connecting holes 332 and bolts, not only is the structure of the adjustment mechanism simplified, but the manufacturing cost is also reduced. At the same time, positioning errors caused by mechanical transmission clearance during sliding are avoided.

[0026] In the specific implementation process, the second connecting holes 332 are multiple through holes arranged at intervals along the length direction of the slider 210. Specifically, they can be equidistantly distributed round or square holes. By selecting different hole positions, the distance between the connecting plate 310 and the slider 210 can be coarsely adjusted. The bolts are threaded fasteners, specifically hexagonal head bolts or flange bolts. By tightening the nuts, the connecting plate 310 and the slider 210 are locked at the selected hole positions. The surface of the connecting plate 310 is machined with two rows of second connecting holes 332 symmetrically distributed along its length direction, each row containing multiple holes.

[0027] When it is necessary to adjust the distance between the measuring instrument 320 and the plane to be measured, the operator can loosen the bolts, slide the connecting plate 310 along the slider 210 to the target position, and then tighten the bolts through the corresponding holes. For example, if the distance between the two rows of holes is 50 mm, each adjustment can achieve a distance change in integer multiples of 50 mm.

[0028] In some embodiments, please refer to Figure 7 The measuring assembly 300 also includes a fine adjustment unit 340. The measuring instrument 320 and the connecting plate 310 are connected through the fine adjustment unit 340. The fine adjustment unit 340 includes a fixing sleeve 341 fixedly connected to the connecting plate 310 and a fastening bolt 342. The shaft tube of the measuring instrument 320 is inserted into the fixing sleeve 341 at different depths. The fastening bolt 342 abuts against the measuring instrument 320 through the fixing sleeve 341, so that the operator can perform precise fine adjustment after coarse adjustment and positioning, ensuring that the measuring instrument 320 probe forms a stable contact with the measured surface, thereby improving the reliability of the flatness detection data.

[0029] In practical implementation, the fixing sleeve 341 is a cylindrical structure rigidly connected to the connecting plate 310. It can be made of metal or engineering plastic and serves to enclose the shaft of the measuring instrument 320 and provide axial movement guidance. The fastening bolt 342 is a threaded connector penetrating the side wall of the fixing sleeve 341. It can be a set screw structure with a knob, where tightening pushes the bolt end into contact with the rod of the measuring instrument 320, locking the position of the measuring instrument 320. The rod of the measuring instrument 320 forms a clearance fit with the inner hole of the fixing sleeve 341, specifically using a hole-shaft fit with an H7 / h6 tolerance grade, allowing the measuring instrument 320 to be finely adjusted axially within the fixing sleeve 341.

[0030] When it is necessary to adjust the contact position between the probe of the measuring instrument 320 and the surface to be measured, first loosen the fastening bolt 342 to release the constraint on the measuring instrument 320, then move the measuring instrument 320 axially along the inner hole of the fixing sleeve 341 to the target position, and then tighten the fastening bolt 342 so that its end presses against the rod of the measuring instrument 320 to complete the fixation. This process can achieve a fine adjustment accuracy of 0.01 mm after the coarse adjustment unit 330 has completed the millimeter-level distance adjustment.

[0031] In some embodiments, please refer to Figure 3 and Figure 4 The moving component 200 includes a moving unit 220, which includes a lead screw 221 and a nut seat 222. Both ends of the lead screw 221 are connected to the crossbeam 120 via brackets, and one end of the nut seat 222 is connected to the connecting plate 310. The nut seat 222 is threadedly connected to the lead screw 221. Through the transmission mechanism of the lead screw 221 and the nut seat 222, rotational motion is converted into linear displacement, avoiding the offset of the measuring instrument 320 caused by direct force application, and reducing the impact of mechanical backlash on the measurement results. The moving unit 220 can improve the repeatability and reliability of flatness inspection while retaining the advantages of simple structure and low cost, making it suitable for rapid on-site measurement in the workshop.

[0032] Traditional flatness measuring tools rely on manually pushing the slider 210, which suffers from inaccurate positioning and is prone to wobbling. The moving unit 220 can achieve precise control over the position and movement trajectory of the measuring instrument 320, thus solving the above problems.

[0033] In practical implementation, the lead screw 221 is a drive shaft with helical grooves on its surface, which can be implemented using a trapezoidal thread or a ball screw 221. It converts rotational motion into linear motion to drive the nut seat 222 to move axially. The nut seat 222 is a connecting component with threaded holes that match the lead screw 221. It can be made of cast iron or aluminum alloy and is used to convert the rotational motion of the lead screw 221 into the linear displacement of the connecting plate 310. The bracket is a support structure used to fix the lead screw 221. It can be formed by welding U-shaped steel plates and fixed to the cross frame 120 at both ends with bolts to maintain the stable operation of the lead screw 221.

[0034] Specifically, the two ends of the lead screw 221 are fixed to the crossbeam 120 by brackets, and the nut seat 222 is rigidly connected to the connecting plate 310. When the lead screw 221 rotates, the nut seat 222 moves along the axial direction of the lead screw 221, causing the connecting plate 310 and the measuring instrument 320 to move synchronously. This structure achieves continuous adjustment of the position of the measuring instrument 320 through the precise fit of the threaded pair, eliminating the gap error caused by the traditional manual push-pull slider 210, thereby improving measurement accuracy.

[0035] It should be noted that the moving unit 220 also includes a handwheel 223, which is rotatably connected to the lead screw 221. The handwheel 223 is fixedly installed at the end of the lead screw 221. When the operator rotates the handwheel 223 clockwise or counterclockwise, the lead screw 221 rotates synchronously. At this time, the nut seat 222, which is threaded into the lead screw 221, moves along the axial direction of the lead screw 221, causing the slider 210 and the measuring component 300 to be displaced on the crossbeam 120. The handwheel 223 drive structure relies entirely on manual operation, which reduces the equipment manufacturing cost and improves the applicability of the device in environments without power.

[0036] In some embodiments, the measuring instrument 320 is a dial indicator or a lever indicator.

[0037] A dial indicator is a mechanical measuring instrument that converts minute linear displacement into pointer rotation angle through a gear transmission mechanism. Specifically, it can be implemented using a mechanical dial indicator with a graduation of 0.001 mm. It offers high measurement accuracy and stability, making it suitable for scenarios requiring high-precision flatness measurement. A lever dial indicator, on the other hand, is a contact measuring instrument that converts minute displacement of the measuring rod into pointer deflection through a lever transmission mechanism. Specifically, it can be implemented using a lever dial indicator with a graduation of 0.01 mm. Its measuring head is adjustable at multiple angles, making it suitable for flatness measurement in confined spaces or on complex surfaces.

[0038] By leveraging the high sensitivity of dial indicators or lever gauges, quantitative detection of flatness deviations is achieved, while retaining the advantages of simple device structure and portability, thus meeting the needs for rapid flatness detection in general industrial scenarios.

[0039] In the flatness measuring device, a dial indicator or lever gauge is detachably fixed to the connecting plate 310. When the moving component 200 moves the measuring gauge 320 along the surface being measured, the probe of the measuring gauge 320 contacts the surface and generates a displacement signal. The flatness deviation is determined by reading the pointer deflection or the digital display value. The dial indicator is suitable for high-precision testing requirements, while the lever gauge can adapt to space-constrained measurement environments. Both can be flexibly selected according to the actual working conditions.

[0040] In some embodiments, please refer to Figure 1 and Figure 2 The bottom of the plate 111 is provided with a plane for matching the reference plane, and the top of the plate 111 is fixedly connected to the vertical frame 110.

[0041] By using an independently configured plane 111 for surface contact positioning with the reference surface, the measuring component 300 maintains a stable vertical posture, thereby improving the repeatability and accuracy of flatness testing and meeting the rapid positioning requirements in industrial settings. When measuring flatness, the plane 111 utilizes its high-precision surface positioning to establish a horizontal reference, effectively isolating the influence of bracket processing errors on measurement accuracy.

[0042] In practical implementation, the leveling plate 111 is a plate-like structure with a flat contact surface, which can be made of metal or hard polymer material. Its bottom plane is ground to form a leveling surface, which is used to fit with the external reference surface to ensure the verticality of the vertical frame 110 after installation. The leveling surface is a precision-machined flat surface, which can be formed by grinding. Its flatness error can be controlled at the micrometer level. It achieves rapid leveling of the device by making full contact with the reference surface.

[0043] The leveling plate 111 is fixed to the bottom of the vertical frame 110 by welding or bolting at the top. During installation, the operator places the leveling plate against a reference surface near the workpiece to be measured, using the friction between the leveling plate and the reference surface to maintain the stability of the device. After the leveling plate contacts the reference surface, the tilt error of the device can be eliminated by adjusting the position of the vertical frame 110, ensuring that the horizontal frame 120 is in a horizontal state, providing an accurate reference for subsequent flatness measurement.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A flatness measuring device, characterized in that, include: A portal frame includes two vertical frames and a horizontal frame perpendicular to the vertical frames. The two ends of the horizontal frame are respectively connected to the two vertical frames. A leveling plate is provided at the bottom of the vertical frames. A movable component, the movable component including a slider, the slider being slidably engaged with the crossbeam; The measuring assembly includes a connecting plate, a measuring gauge for measuring flatness, and a coarse adjustment unit. The connecting plate and the slider are connected through the coarse adjustment unit, which can adjust the distance between the connecting plate and the slider. The measuring gauge is detachably connected to the connecting plate.

2. The flatness measuring device according to claim 1, characterized in that, The coarse adjustment unit includes a first connecting hole, which is an elongated hole. The first connecting hole is opened on the connecting plate, and bolts pass through different positions of the first connecting hole to connect with the slider, so as to adjust the distance between the connecting plate and the slider.

3. The flatness measuring device according to claim 1, characterized in that, The coarse adjustment unit includes a second connecting hole, and a plurality of the second connecting holes are arranged in an array opposite to each other. The second connecting holes are opened on the slider, and bolts pass through the connecting plate and are connected to different second connecting holes to adjust the distance between the connecting plate and the slider.

4. A flatness measuring device according to any one of claims 1-3, characterized in that, The measuring assembly also includes a fine adjustment unit. The measuring instrument is connected to the connecting plate through the fine adjustment unit. The fine adjustment unit includes a fixing sleeve and a fastening bolt that are fixedly connected to the connecting plate. The measuring instrument is inserted into the fixing sleeve at different depths, and the fastening bolt abuts against the measuring instrument through the fixing sleeve.

5. A flatness measuring device according to claim 1, characterized in that, The moving component further includes a moving unit, which includes a lead screw and a nut seat. The two ends of the lead screw are connected to the cross frame via a bracket, and one end of the nut seat is connected to the connecting plate. The nut seat is threadedly connected to the lead screw.

6. The flatness measuring device according to claim 5, characterized in that, The moving unit also includes a handwheel, which is rotatably connected to the lead screw.

7. The flatness measuring device according to claim 1, characterized in that, The measuring instrument is a dial indicator or a lever indicator.

8. A flatness measuring device according to claim 1, characterized in that, The bottom of the finding plate is provided with a finding plane for matching with the reference plane, and the top of the finding plate is fixedly connected to the vertical frame.

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