An engineering quality flatness detector

Abstract

This invention proposes an engineering quality flatness testing instrument, including a ruler. A side constraint plate is fixedly connected to one side of the ruler, and a top constraint plate is fixedly connected to the top of the ruler. The advantages of this invention are: the ruler is placed on the road surface, and a counterweight hangs down to the road surface under gravity, causing the longer end of a lever to tilt upwards via a connecting rod. The tilting height of each lever is identified using scale lines, allowing the highest lever to be found. A feeler gauge is inserted between the ruler and the road surface at this lever to measure the gap height. Since one end of the lever is longer than the other, the vertical displacement of the shorter end will cause a multiple vertical displacement of the longer end. Utilizing this principle, along with the connecting rod and counterweight, the height of the gap between the ruler and the road surface can be magnified multiple times, making it easier for workers to identify. Combined with scale lines, it is easier to accurately find the maximum gap, reducing errors and resulting in more accurate test data.

Description

Technical Field

[0001] This utility model relates to the field of flatness testing technology, and in particular to an engineering quality flatness testing instrument. Background Technology

[0002] Smoothness testing is an important technical means of measuring the smoothness of road surfaces, ground surfaces, or other surfaces. Its results directly affect surface performance, driving comfort, and safety. In road engineering, building construction, and industrial manufacturing, smoothness testing is a key step in quality control.

[0003] In existing technologies, the smoothness of road surfaces is typically inspected using a three-meter straightedge and feeler gauges. During the inspection, workers place the three-meter straightedge flat at the inspection location, visually determine the maximum gap between the straightedge and the road surface, and then insert a feeler gauge into that gap to measure its height. Since the gap between the road surface and the straightedge is generally not very large, determining the maximum gap visually is prone to error, which can affect the accuracy of the inspection data. Therefore, this paper proposes an improved engineering quality smoothness inspection instrument. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to provide an engineering quality flatness testing instrument to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, one embodiment of this utility model provides an engineering quality flatness testing instrument, including a ruler. A side constraint plate is fixedly connected to one side of the ruler, and a top constraint plate is fixedly connected to the top of the ruler. Both the side constraint plate and the top constraint plate are provided with several limiting grooves. A shaft is rotatably connected in the limiting groove. A shorter lever closer to the side constraint plate is fixedly connected to the shaft. A connecting rod is rotatably connected to one end of the shorter side of the lever. A counterweight is fixedly connected to the bottom end of the connecting rod. Several horizontally set scale lines are provided on the side of the top constraint plate away from the side constraint plate.

[0007] Preferably, in any of the above embodiments, the ruler has a pivot in the middle, and the ruler, the constraint plate, and the top constraint plate can be folded around the pivot.

[0008] Preferably, in any of the above embodiments, the top constraint plate is provided with locking rods on both sides of the ruler's pivot, and one of the locking rods is fitted with a locking plate that can be fastened to the other locking rod.

[0009] The above technical solution employs a ruler as the main body of the testing device, ensuring its bottom surface is flat. Based on usage habits, its total length is generally [m]. A pivot is installed in the middle of the ruler; rotating it halves the length of the folded ruler, making it easier to retrieve and store. Side and top constraint plates, with their respective limiting grooves, constrain the connecting rods and levers, preventing displacement in other directions. A locking rod and locking plate are installed on the top constraint plate; after the ruler is unfolded, the locking plate can be rotated to lock onto another locking rod, thus fixing the ruler's shape.

[0010] Preferably, in any of the above schemes, the shaft is disposed in the limiting groove on one side near the side constraint plate, and a plurality of the limiting grooves are evenly arranged along the length of the ruler.

[0011] The above technical solution employs a shaft that provides a mounting platform for the lever. One end of the lever is longer than the other; vertical displacement of the shorter end causes a multiple-fold vertical displacement of the longer end. Utilizing this principle, along with a connecting rod and a counterweight, the height of the gap between the ruler and the road surface can be magnified several times, facilitating worker identification. Specifically, during inspection, the ruler is placed on the road surface, and the counterweight hangs down to the surface under gravity. This counterweight, through the connecting rod, causes the longer end of the lever to tilt upwards. Workers can then determine the location of the largest gap based on the tilting heights of multiple levers. Several evenly distributed limiting grooves provide space for multiple sets of shafts, levers, and other structures, helping to ensure inspection accuracy.

[0012] Preferably, in any of the above schemes, the scale lines are of different colors, and the colors of the scale lines gradually change from light to dark from bottom to top.

[0013] The above technical solution involves setting several scale lines on the top constraint plate. When determining the location of the largest gap, the lever that crosses the scale line can be directly observed. Different colors are used for the scale lines to facilitate alignment by the staff. The scale lines gradually darken to make them easier for the staff to distinguish.

[0014] Preferably, one end of the ruler is fixedly connected to a mounting frame, a vertical drive assembly is provided inside the mounting frame, a driveable slider is provided on the vertical drive assembly, and an infrared emitter is provided on the slider.

[0015] The above technical solution involves setting up an installation frame, a vertical drive assembly, a slider, and an infrared emitter. During the inspection process, the operator can use the vertical drive assembly to move the slider vertically, which in turn moves the infrared emitter vertically. The infrared emitter then emits infrared rays, and the specific height of levers with small differences is determined based on the landing point of the infrared rays, thus improving the accuracy of the inspection.

[0016] Preferably, in any of the above solutions, the end of the ruler without a mounting frame is provided with an end plate, the vertical drive assembly is a lead screw rotatably connected within the mounting frame, and a rotating handle is fixedly connected to the top of the lead screw.

[0017] The above technical solution employs an end plate at the end of the ruler to receive the infrared rays, preventing the infrared emitter from being unable to find its landing point when it is higher than all levers. A lead screw drives the slider, resulting in a simple structure and low cost. A handle is provided on the lead screw for easy rotation by the operator.

[0018] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0019] 1. This engineering quality flatness testing instrument, through the setting of side constraint plates, top constraint plates, limiting grooves, shafts, levers, connecting rods, counterweights, and scale lines, works as follows: A ruler is placed on the road surface, and the counterweight hangs down to the road surface under gravity, causing the longer end of the lever to tilt upwards via the connecting rod. The scale lines are used to identify the tilting height of each lever, pinpointing the highest lever. A feeler gauge is then inserted between the ruler and the road surface at that lever to measure the gap height. Since one end of the lever is longer than the other, the vertical displacement of the shorter end will cause a multiple of vertical displacement of the longer end. Utilizing this principle, along with the connecting rods and counterweights, the height of the gap between the ruler and the road surface can be magnified, making it easier for workers to identify. Combined with the scale lines, it is easier to accurately find the maximum gap, reducing errors and resulting in more accurate test data.

[0020] 2. The flatness testing instrument for this project uses different colored scale lines to facilitate alignment by the staff. The scale lines gradually darken, making them easier for staff to distinguish. By incorporating a mounting frame, vertical drive assembly, slider, and infrared emitter, during testing, the staff can use the vertical drive assembly to move the slider vertically, which in turn moves the infrared emitter vertically. The emitter then emits infrared light, and the point where the infrared light falls is used to determine the specific height of levers with small differences, thus improving testing accuracy.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a first-view structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the second-view structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the third-view structure of this utility model;

[0026] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0027] In the diagram: 1-ruler, 2-side constraint plate, 3-top constraint plate, 4-limiting groove, 5-shaft, 6-lever, 7-connecting rod, 8-counterweight, 9-scale line, 10-mounting frame, 11-vertical drive assembly, 12-slider, 13-infrared emitter, 14-end plate. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] like Figures 1-4 As shown, this utility model includes a ruler 1, a side constraint plate 2 fixedly connected to one side of the ruler 1, and a top constraint plate 3 fixedly connected to the top of the ruler 1. Both the side constraint plate 2 and the top constraint plate 3 are provided with several limiting grooves 4. A shaft 5 is rotatably connected in the limiting groove 4. A shorter lever 6 is fixedly connected to the shaft 5 near the side constraint plate 2. A connecting rod 7 is rotatably connected to one end of the shorter side of the lever 6. A counterweight 8 is fixedly connected to the bottom end of the connecting rod 7. Several horizontally set scale lines 9 are provided on the side of the top constraint plate 3 away from the side constraint plate 2.

[0031] Example 1: A pivot is provided in the middle of the ruler 1, allowing the ruler 1, constraint plate 2, and top constraint plate 3 to be folded. Locking rods are provided on both sides of the pivot on the top constraint plate 3, with a locking plate fitted onto one of the locking rods to fasten to the other. The ruler 1, as the main body of the detection device, should have a flat bottom surface. Based on usage habits, its total length is generally 3m. The pivot in the middle of the ruler 1 halves its length after folding, making it easier to use and store. The side constraint plate 2 and top constraint plate 3, with their respective limiting grooves 4, constrain the connecting rod 7 and lever 6, preventing displacement in other directions. Locking rods and locking plates are provided on the top constraint plate 3; after the ruler 1 is unfolded, the locking plate can be rotated to fasten to the other locking rod, thus fixing the shape of the ruler 1.

[0032] Example 2: The shaft 5 is located within the limiting groove 4 on one side near the side constraint plate 2. Several limiting grooves 4 are evenly arranged along the length of the ruler 1. The shaft 5 provides an installation platform for the lever 6. One end of the lever 6 is longer than the other. The vertical displacement of the shorter end will cause the longer end to undergo a multiple vertical displacement. Utilizing this principle, in conjunction with the connecting rod 7 and the counterweight 8, the height of the gap between the ruler 1 and the road surface can be magnified multiple times, making it easier for workers to identify. Specifically, during the inspection, the ruler 1 is placed on the road surface. The counterweight 8 hangs down to the road surface under gravity and, through the connecting rod 7, causes the longer end of the lever 6 to tilt upwards. At this time, workers can assess the location of the largest gap based on the tilting height of multiple levers 6. Several evenly arranged limiting grooves 4 provide space for multiple sets of shafts 5, levers 6, and other structures, which helps to ensure inspection accuracy.

[0033] Several scale lines 9 are of different colors, with the color gradually increasing from light to dark from bottom to top. Several scale lines 9 are set on the top constraint plate 3, allowing direct observation of the lever 6 that crosses the scale line when determining the position of the largest gap. The different colors of the scale lines 9 facilitate alignment by the staff. The gradual darkening of the scale lines 9 makes them easier for the staff to distinguish.

[0034] Example 3: A mounting frame 10 is fixedly connected to one end of a ruler 1. A vertical drive assembly 11 is installed inside the mounting frame 10. A drivable slider 12 is installed on the vertical drive assembly 11, and an infrared emitter 13 is installed on the slider 12. By setting up the mounting frame 10, the vertical drive assembly 11, the slider 12, and the infrared emitter 13, during the inspection work, the operator can use the vertical drive assembly 11 to drive the slider 12 to move vertically as needed, thereby driving the infrared emitter 13 to move vertically. The infrared emitter 13 emits infrared rays, and the specific height of the lever with small differences is determined based on the landing point of the infrared rays, thus improving the accuracy of the inspection.

[0035] The ruler 1 has an end plate 14 at the end without the mounting frame 10. The vertical drive assembly 11 uses a lead screw rotatably connected within the mounting frame 10, with a handle fixedly connected to the top of the lead screw. The end plate 14 at the end of the ruler 1 can receive infrared rays, preventing the infrared emitter 13 from not finding the infrared ray landing point when it is higher than all levers 6. The lead screw drives the slider 12, resulting in a simple structure and low cost. The handle on the lead screw facilitates rotation by the operator.

[0036] The working principle of this utility model is as follows:

[0037] S1. Place ruler 1 on the road surface. The counterweight 8 hangs down to the road surface under the action of gravity, and the longer end of lever 6 is lifted by the connecting rod 7.

[0038] S2. Use the scale line 9 to identify the tilt height of each lever 6 and find the highest lever 6. Insert a feeler gauge between the ruler 1 and the road surface at the lever 6 to measure the height of the gap.

[0039] Compared with the prior art, the present invention has the following advantages:

[0040] 1. The engineering quality flatness testing instrument, through the setting of side constraint plate 2, top constraint plate 3, limiting groove 4, shaft 5, lever 6, connecting rod 7, counterweight 8, and scale line 9, etc., during the testing work, the ruler 1 is placed on the road surface, and the counterweight 8 hangs down to the road surface under the action of gravity, and drives the longer end of lever 6 to tilt up through the connecting rod 7. The scale line 9 is used to identify the tilting height of each lever 6, and the highest lever 6 is identified. A feeler gauge is inserted between the ruler 1 and the road surface at the lever 6 to measure the height of the gap. One end of lever 6 is longer than the other. The vertical displacement of the shorter end will cause the longer end to have a multiple vertical displacement. Using this principle, in conjunction with the connecting rod 7 and the counterweight 8, the height of the gap between the ruler 1 and the road surface can be magnified many times, making it easier for the staff to identify. With the help of the scale line 9, it is easier to accurately find the maximum gap, reduce the error, and make the test data more accurate.

[0041] 2. The flatness testing instrument for this project uses different colors for the scale lines 9, making it easier for workers to align them. The scale lines 9 gradually darken, making them easier for workers to distinguish. By setting up the mounting frame 10, vertical drive assembly 11, slider 12, and infrared emitter 13, during the testing process, workers can use the vertical drive assembly 11 to drive the slider 12 to move vertically, which in turn drives the infrared emitter 13 to move vertically. The infrared emitter 13 emits infrared rays, and the specific height of levers with small differences is determined based on the landing point of the infrared rays, improving the accuracy of the test.

Claims

1. An instrument for detecting the quality of a flatness of an engineering, comprising a ruler (1); characterized in that, A side constraint plate (2) is fixedly connected to one side of the ruler (1), and a top constraint plate (3) is fixedly connected to the top of the ruler (1). Several limiting grooves (4) are provided on both the side constraint plate (2) and the top constraint plate (3). A shaft (5) is rotatably connected in the limiting groove (4). A shorter lever (6) is fixedly connected to the shaft (5) on the side closer to the side constraint plate (2). A connecting rod (7) is rotatably connected to one end of the shorter side of the lever (6). A counterweight (8) is fixedly connected to the bottom end of the connecting rod (7). Several horizontally set scale lines (9) are provided on the side of the top constraint plate (3) away from the side constraint plate (2).

2. An instrument for detecting the quality of a flatness according to claim 1, characterized in that: The ruler (1) has a pivot in the middle, and the ruler (1), the constraint plate (2) and the top constraint plate (3) can be folded with respect to the pivot.

3. An instrument for detecting the quality of a flatness according to claim 2, characterized in that: Locking rods are provided on both sides of the pivot of the ruler (1) on the top constraint plate (3), and a locking plate that can be fastened to the other locking rod is sleeved on one of the locking rods.

4. An instrument for detecting the quality of a surface levelling according to claim 3, characterized in that: The shaft (5) is set in the limiting groove (4) on one side near the side constraint plate (2), and several of the limiting grooves (4) are evenly arranged along the length direction of the ruler (1).

5. An instrument for detecting the quality of a surface levelling according to claim 4, characterised in that: The scale lines (9) are of different colors, and the colors of the scale lines (9) gradually change from light to dark from bottom to top.

6. An instrument for detecting the quality of grading as claimed in claim 5, characterized in that: One end of the ruler (1) is fixedly connected to a mounting frame (10). A vertical drive assembly (11) is provided inside the mounting frame (10). A driveable slider (12) is provided on the vertical drive assembly (11). An infrared emitter (13) is provided on the slider (12).

7. An engineered quality flatness detector as claimed in claim 6, wherein: The ruler (1) has an end plate (14) at one end without the mounting frame (10). The vertical drive assembly (11) is a lead screw rotatably connected to the mounting frame (10), and a rotating handle is fixedly connected to the top of the lead screw.

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