Gap measurement tool, flatness measurement tool, and measurement device

Abstract

The present application relates to a gap measuring tool, comprising a wedge-shaped body, a wedge-shaped surface of which comprises a first edge and a second edge forming a wedge-shaped top corner, the first edge abutting against one side of a gap during measurement, and a plurality of parallel scale lines located on the second edge, the scale lines forming a non-perpendicular angle with the second edge. The present application also relates to a surface difference measuring tool, comprising: a body comprising a housing, and a scale disc provided on a bottom surface of the body, the scale disc comprising a plurality of scale lines; a pointer for indicating the scale lines; at least two parallel reference columns fixed on the housing, one end of each reference column being fixed on the housing and the other end extending out of the housing by the same height; at least one telescopic column parallel to the reference columns and capable of linear motion relative to the housing; and a transmission mechanism capable of transmitting the linear motion of the telescopic column to the pointer. The present application also relates to a detection device comprising the aforementioned gap measuring tool and the aforementioned surface difference measuring tool.

Description

Technical Field

[0001] The present invention relates to a gap measuring tool, a surface difference measuring tool, and a measuring device including the gap measuring tool and the surface difference measuring tool. Background Technology

[0002] In industrial production, it is often necessary to inspect whether the quality of products or assembly is within the specified acceptable tolerance range. For example, in the process of assembling automobiles, it is necessary to check whether the size of the gap between the taillights is within the specified tolerance range, and it is also necessary to check whether the height difference (called surface difference) between the outer surfaces of the taillights is within the specified tolerance range.

[0003] The current technical solution used for testing is to use traditional segmented feeler gauges and surface difference gauges to detect the gaps between the taillights and the surface differences between the outer surfaces of the taillights, respectively.

[0004] A segmented feeler gauge consists of multiple long, thin measuring strips, each with a specific thickness and marked with corresponding readings, such as 2mm, 1mm, 1 / 2mm, 1 / 4mm, etc. Each thickness has a specific color for easy identification, and multiple strips can be used for each thickness. All strips are connected together at one end along their length in a pivotable manner relative to each other. In use, for example, when checking the gap between car taillights, the measuring person first visually assesses the gap between the two taillights. Then, holding the segmented feeler gauge, the person selects a suitable thickness or combination of strips based on experience. The selected strip or combination of strips is then inserted into the gap between the taillights, and adjustments are made as needed. For example, if the selected gauge piece or gauge piece combination is too thick to be inserted into the gap between the taillights, replace it with a gauge piece or gauge piece combination of smaller thickness and insert it into the taillight gap; if the selected gauge piece or gauge piece combination is too thin and cannot fill the gap when inserted into the taillight gap, and there is a large remaining space, replace it with a gauge piece or gauge piece combination of larger thickness and insert it into the taillight gap.

[0005] This process often requires surveyors to repeatedly try different gauges and combinations based on their experience. Only after selecting the appropriate gauges and combinations can the size of the gap between the two taillights be estimated based on the thickness of the finally selected gauges and combinations. Therefore, the operation time is relatively long. Furthermore, the measurement method is stepped, and the measurement accuracy cannot be accurate to below 0.1mm. When the measured gap or surface difference value is between two gauge scales, it can only be estimated.

[0006] The surface difference gauge used to measure the surface difference between the outer surfaces of a car's taillights is similar to a segmented feeler gauge. It also consists of multiple thin, elongated (usually rectangular) gauge pieces, connected at one end along their length in a pivotable manner relative to each other. The difference is that the other end of each gauge piece along its length is not flat in the width direction, but includes a step. Each gauge piece's step has a specific height, and the surface difference reading corresponding to its step height is marked on it, such as 0.25mm, 0.75mm, 1mm…2.5mm, 3mm, 3.5mm, 4mm, etc. The first gauge piece generally has no step; that is, its end is flat, so its surface difference reading is zero. In use, the measuring person first determines the height difference between the outer surfaces of the two taillights by observation or touch. Then, based on experience, a suitable gauge piece is selected and placed across the gap between the taillights on their outer surfaces, so that the two sides of the gauge piece's step rest against the two outer surfaces on either side of the gap. If both sides of the step can fit or nearly fit with both outer surfaces, estimate the surface difference value based on the reading of the gauge. If one side of the step cannot fit with the corresponding outer surface of the headlight and there is a visible distance between them, replace the gauge with one that has a larger or smaller reading, depending on which side of the step does not fit with the headlight's outer surface. Repeat the above process until both sides of the step of the gauge can fit or nearly fit with the outer surfaces of both headlights, and then read the reading of the gauge to estimate the surface difference value.

[0007] Therefore, measurements using a facet gauge require the surveyor to repeatedly change and select suitable gauge pieces to obtain the final measurement result, resulting in a long operation time. Furthermore, the measurement method is stepped, and the measurement accuracy is only an estimate, depending on the difference in readings between gauge pieces, leading to relatively low accuracy.

[0008] During automobile assembly, it is often necessary to measure both the gap size and surface difference of the taillights at the same workstation and in the same process. However, as mentioned above, the measuring personnel need to carry two different tools to perform these two measurements separately, which brings inconvenience to the measurement work.

[0009] In summary, the existing technology using traditional segmented feeler gauges and surface difference gauges has the following disadvantages:

[0010] 1) Stepped measurement method has low measurement accuracy.

[0011] 2) The operation time is relatively long, and the measurement results are unstable, depending on the experience of the measurement personnel.

[0012] 3) Inconvenient to operate. Summary of the Invention

[0013] The measuring device provided by this invention can at least partially solve the above-mentioned technical problems existing in the prior art. Therefore, the object of this invention is to provide a measuring device that can quickly measure gap size and / or surface difference, and can measure in a stepless manner, thereby improving the measurement accuracy of gap size and / or surface difference.

[0014] Another object of the present invention is to provide a measuring device that can measure both gap size and surface difference, thus making the measuring operation convenient.

[0015] Another object of the present invention is to provide a measuring device that is simple in structure and manufacture, low in cost, and has high precision.

[0016] Another object of the present invention is to provide a measuring device that is small enough to be carried on one's person, thereby facilitating measurement work.

[0017] This invention provides a gap measuring tool, comprising a wedge-shaped body. The wedge-shaped surface of the wedge-shaped body includes a first side and a second side forming a wedge apex angle α. When the gap measuring tool performs a measurement, the first side abuts against one side of the gap to be measured. Multiple parallel scale lines are located at or near the second side. The key feature is that the scale lines form a non-perpendicular angle γ with the second side, and the gap to be measured forms an acute angle β relative to a horizontal line. The non-perpendicular angle γ satisfies the condition: γ = β - α. Therefore, during measurement, the scale lines of the gap measuring tool are horizontal, allowing for convenient and accurate readings.

[0018] Preferably, the scale mark h on each scale line is determined according to the following formula: d×sinα=h, where d is the distance from the intersection of each scale line and the second side to the vertex of the wedge.

[0019] Preferably, the wedge-shaped body further includes two side surfaces, which intersect the wedge-shaped surface at the first side and the second side, respectively. The gap to be measured is formed by two parallel surfaces. When the gap measuring tool performs the measurement, the side surface where the first side is located can fit against one of the surfaces forming the gap to be measured.

[0020] Preferably, a qualified scale range is marked on the wedge surface according to the predetermined tolerance requirements, which makes it easier for measuring personnel to judge the product quality.

[0021] This application also provides a surface difference measuring tool, comprising: a main body including a housing, and a scale dial with multiple graduation lines provided on the bottom surface of the main body; a pointer for indicating the graduation lines on the scale dial; at least two parallel reference posts fixed to the housing, one end of each reference post being fixed to the housing and the other end extending from the housing at the same height; at least one telescopic post parallel to the reference posts and capable of linear movement relative to the housing; and a transmission mechanism capable of transmitting the linear movement of the telescopic post to the pointer. Therefore, this application provides a mechanical surface difference measuring tool that is simple to use and provides accurate measurement results.

[0022] Preferably, the telescopic column passes through a through hole in the housing and is capable of linear movement along the through hole.

[0023] Preferably, the transmission mechanism includes: a gear capable of rotating integrally and concentrically with the pointer; a rack meshing with the gear, one longitudinal end of the rack being fixed to the telescopic column; and an elastic member, such as a spring, located between the other longitudinal end of the rack and the housing, so that the rack abuts against the housing via the elastic member, the rack being capable of linear movement together with the telescopic column, and returning to its initial position via the elastic member.

[0024] Preferably, the transmission mechanism further includes a rod, one end of which is fixed to the telescopic column or integrally formed with the telescopic column, and the other end of which abuts against the housing through the elastic element. The rack is fixed to the rod or integrally formed with the rod.

[0025] Preferably, the rod comprises two separate parts, each of which is integrally fixed to the rack. This facilitates the installation of the rod within the housing.

[0026] Preferably, the rod includes a first plane, and the rack is fixed to the rod on the first plane.

[0027] Preferably, the other end of the rod includes a flange, and one end of the elastic element abuts against the flange.

[0028] Preferably, the transmission mechanism further includes a positioning mechanism for guiding the movement of the rack. Preferably, the positioning mechanism includes a positioning rod, one end of which is fixed to the housing and the other end is inserted into the other end of the rod, allowing the rod to move linearly along the positioning rod. Preferably, the elastic element surrounds the positioning rod.

[0029] Preferably, the surface difference measuring tool further includes a limiting device, which is fixed on the housing and directly or indirectly abuts against one end of the elastic element to limit the initial position of the elastic element.

[0030] Preferably, the limiting device is fixed to the housing in an adjustable manner, thereby enabling adjustment of the initial position of the elastic element. For example, the limiting device is fixed to the housing via an elongated hole and screws.

[0031] Preferably, the limiting device abuts against the flange to limit the initial position of the elastic element.

[0032] Preferably, the rod includes a second plane, and the lower surface of the limiting device approaches or contacts the second plane of the rod. Preferably, lubrication is applied between the second plane and the lower surface of the limiting device.

[0033] Preferably, a smaller plane is defined at the ends of the two reference columns, and the planes of the two reference columns are flush with each other and coplanar. Preferably, the telescopic column also defines a smaller plane at the top surface of its free end.

[0034] Preferably, the housing has a fan-shaped outer contour on the side near the dial and a straight outer contour on the other sides.

[0035] Preferably, the zero mark in the scale is located in the middle of the plurality of scale lines, with a scale line on one side indicating a positive reading and a scale line on the other side indicating a negative reading. When the elastic element is in the initial position, the pointer indicates the scale line at one end of the dial.

[0036] This application also provides a detection device, including: a gap measuring tool according to the above description, and a surface difference measuring tool according to the above description.

[0037] Preferably, one side of the gap measuring tool is flush with one side of the surface difference measuring tool.

[0038] The measuring device of the present invention has the following advantages:

[0039] 1) It can quickly measure gap size and / or surface difference, and improve the measurement accuracy of gap size and / or surface difference;

[0040] 2) It can measure both gap size and surface difference, thus making the measurement work convenient;

[0041] 3) Its structure and manufacturing are simple, its cost is low, and the tool itself has high precision;

[0042] 4) Its size is suitable for carrying around, further facilitating measurement work. Attached Figure Description

[0043] The accompanying drawings illustrate a preferred embodiment of the present invention, wherein:

[0044] Figure 1 A perspective view of the measuring device according to the present invention is shown;

[0045] Figure 2 A front view of the measuring device according to the present invention is shown;

[0046] Figure 3 A right view of the measuring device according to the present invention is shown;

[0047] Figure 4 A bottom view of the measuring device according to the present invention is shown;

[0048] Figure 5 Is with Figure 2 A similar front view of the measuring device according to the invention, wherein the panel is removed to show the internal structure;

[0049] Figure 6 This is a schematic diagram illustrating the measurement of the gap between two car taillights using the measuring device according to the invention;

[0050] Figure 7 This is a schematic diagram showing... Figure 6 A magnified view of a gap measured using the measuring device according to the present invention;

[0051] Figure 8 This is a schematic diagram illustrating the measurement of the surface difference between the outer surfaces of two car taillights using the measuring device according to the invention. Detailed Implementation

[0052] refer to Figure 1-5 The figure shows a measuring device 1 according to the present invention. As shown, the measuring device 1 of the present invention comprises two parts: a gap measuring tool 2 and a surface difference measuring tool 3, which can be assembled together as a single device as shown, or they can be two separate tools used individually.

[0053] like Figure 1 , 2 As shown in Figure 5, the gap measuring tool 2 includes a wedge-shaped body, wherein the wedge-shaped surface includes two intersecting sides 4 and 5, and an acute apex angle α (see Figure 5). Figure 7 The wedge-shaped body may also include two opposing side surfaces, located on opposite sides of the wedge-shaped surface, with one side surface 33 intersecting the wedge-shaped surface at edge 4.

[0054] The longitudinal length *l* of the measuring tool determines its overall size, while the size of the apex angle *α* determines the length *l*. A larger apex angle *α* results in a shorter length *l* and denser graduations, while a smaller apex angle *α* results in a longer length *l* and sparser graduations. Therefore, the appropriate apex angle *α* is selected based on the required length and graduation density of the gap measuring tool 2. For example, when the gap measuring tool 2 is used alone, it can have a larger length *l*, thus allowing for a smaller apex angle *α*. When the gap measuring tool 2 is fixed together with the surface difference measuring tool 3 to form a single device 1, a larger apex angle *α* can be used, thereby keeping the overall size of the measuring device 1 small and convenient for the measuring personnel to carry and use.

[0055] See Figure 2 , 5 In section 7, the scale line 6 of the gap measuring tool 2 is not perpendicular to the wedge edge 5, but forms a certain angle γ with the wedge edge 5. The following section explains in detail how to determine the angle γ and the readings of each scale line 6 in conjunction with the use of the gap measuring tool 2.

[0056] See Figure 7 A partially enlarged view is shown of measuring a gap using the gap measuring tool 2 according to the invention, wherein the readings of each scale line 6 are omitted for clarity. In use, the wedge-shaped gap measuring tool 2 is inserted into the gap 7 between the two taillights of a car, such that the side 33 containing one edge 4 forming the wedge is in contact with one side of the gap 7. At this point, the scale corresponding to point A at the opening of the gap 7 on the other edge 5 forming the wedge represents the width of the gap 7. Figure 7 As shown, when one side 4 of the wedge-shaped gap measuring tool 2 is attached to one side of the gap 7, it is preferable that the scale line 6 of the gap measuring tool 2 is parallel to the horizontal line connecting the openings of the gap 7.

[0057] As mentioned above, when manufacturing the gap measuring tool, the apex angle α of the gap measuring tool 2 is determined according to actual needs (the length of the gap measuring tool 2 and the density of the scale lines, etc.), and the tilt angle β of the rear taillight itself (see...) Figure 7 This is also known (automotive design parameters). Continue to refer to... Figure 7 Since the two sides 8 and 9 that form the gap 7 are parallel to each other, the angle between the side 5 of the wedge and the side 9 of the gap is α. Similarly, since the two sides 8 and 9 that form the gap 7 are parallel to each other, the following equation holds:

[0058] γ + α = β, therefore γ = β - α.

[0059] This allows us to determine the angle γ between the gap measuring tool 2 and the wedge-shaped edge 5.

[0060] The scale of the gap measuring tool 2 needs to be determined, specifically the reading of each scale line 6. It should be noted that the reading of scale line 6 represents the perpendicular distance or shortest distance between the parallel edges 8 and 9 that form the gap 7, referred to as the gap width w. Still referring to... Figure 7 The distance d from the vertex B of the gap measuring tool 2 to the intersection point between each scale line 6 and the edge 5 is a known value. If a perpendicular line is drawn from the intersection point between a scale line 6 and the wedge-shaped edge 5 to any side 8 or 9, then the length h of this perpendicular line corresponds to the width w of the gap. Therefore, for example, in... Figure 7 In the right triangle ABC shown in the figure, the following equations hold:

[0061] d×sinα=h,

[0062] Since d and α are both known values, the calculated h is the reading of the scale line 6. Furthermore, according to predetermined tolerance requirements, acceptable scale intervals can be marked on the gap measuring tool 2 using different colors, making it easier for measuring personnel to judge product quality.

[0063] Therefore, the apex angle α of the gap measuring tool 2, the tilt angle γ of the scale line, and the readings of each scale line are determined according to the above method, thereby obtaining the gap measuring tool 2 according to the present invention. The present invention does not use the traditional gauge plate measurement method, but instead uses a wedge-shaped gauge to measure the gap, and designs a suitable oblique scale line for reading based on the special angle of the taillight's shape, making reading convenient and accurate, with a measurement precision of up to 0.02 mm.

[0064] The following is for reference Figure 1-5 8. Explain the structure and use of the surface difference measuring device 3. Figure 5 The mechanical measuring device 1 of the present invention is shown in the figure, wherein the panel 23 (see Figure 2 The area is removed to show the internal structure of the surface difference measuring tool 3.

[0065] The face difference measuring tool 3 according to the present invention mainly includes: a main body 20, which includes a panel 23 and a housing 24, wherein a fan-shaped scale 25 is provided on the bottom surface of the main body 20, and the housing 24 preferably has a fan-shaped outer contour on one side of the scale 25 and a straight outer contour on the other side; a pointer 10 for indicating the scale on the scale 25; at least two parallel reference posts 11, 12 fixed to the housing 24, one end of each reference post being fixed to the housing 24, and the other end extending from the housing and defining a small planar top surface 26 at its end, the planar top surfaces 26 of the two reference posts 11, 12 being flush with each other and coplanar; at least one telescopic post 13 parallel to the reference posts 11, 12 and capable of linear movement relative to the housing 24, for example, the telescopic post 13 passing through a hole in the housing ( Figure 5(not visible in the middle), and is capable of linear movement along the hole, the top surface of the telescopic column 13 at its free end also defines a small plane 27; and a transmission mechanism 28 capable of transmitting the linear movement of the telescopic column 13 to the pointer 10.

[0066] according to Figure 5 In the illustrated embodiment, the transmission mechanism 28 mainly includes: a gear 14, which is fixed to the bottom surface of the main body 20 and can rotate concentrically with the pointer 10; a rack 15 meshing with the gear 14; a rod 18, one end of which is fixed to the telescopic column 13 or integrally formed with the telescopic column, and the other end of which includes a flange 29; the rack 15 is fixed to the rod 18, for example, by at least one screw 16, or integrally formed with the rod 18; a positioning rod 30, one end of which is fixed to the housing 24, and the other end of which is inserted into the flange 29 and / or the hollow portion of the rod; and a spring 17 sleeved on the positioning rod 30, one end of which abuts against the housing 24 and the other end of which abuts against the flange 29.

[0067] Preferably, the transmission mechanism 28 further includes an adjusting limit block 19, which is fixed to the housing 24, for example, by screws 31, and abuts against the flange 29 on the side opposite to the spring 17, thereby limiting the spring 17. Figure 5 The position of the pointer 10 in the lower part of the dial is as follows. If the initial position of the pointer 10 of the face difference measuring tool 3 is not aligned with the end scale of the dial 25 when not in use, the position of the adjustment limit block 19 needs to be adjusted so that the pointer 10 is aligned with the end scale of the dial 25. For this purpose, the adjustment limit block 19 may include an elongated hole (not shown in the figure), and a circular threaded hole is provided on the housing 24. The screw 31 passes through the elongated hole in the adjustment limit block 19 and is screwed into the circular threaded hole in the housing, thereby fixing the adjustment limit block 19 to the housing 24. Of course, the opposite can also be true: an elongated hole is provided on the housing 24, and a circular threaded hole is provided on the adjustment limit block 19. When adjusting the initial position of the pointer 10, first loosen the screw 31, and then adjust the position along the longitudinal direction of the elongated hole of the rod 18 ( Figure 5 Move the adjusting limit block 19 in the vertical direction to adjust the longitudinal position of the adjusting limit block 19 on the housing 24, thereby adjusting the initial position of the pointer. After the adjustment is completed, tighten the screw 31 again.

[0068] Preferably, for ease of installation, the rod 18 is formed comprising two separate parts, each of which is fixed to the rack 15 by screws 16. Preferably, the rod 18 is cylindrical, and the rack is a planar component. For ease of installation, two parallel planes are machined at opposite diameter positions on the cylindrical rod 18. Figure 5 Only the upper machining plane 32 is shown; the lower machining plane, which is parallel to it and has a diameter opposite to it, is shown in the image. Figure 5 The threaded hole is not visible in the middle and passes through the two machined planes. The rack 15 of the plane is made to fit against the lower machined plane of the rod 18, and the screw 16 passes through the threaded hole in the rod 18 and is tightened onto the upper machined plane 32. The lower surface of the adjusting limit block 31 contacts the upper machined plane. To facilitate the relative movement of the rod 18 relative to the adjusting limit block 19 (which will be described in detail below), lubricating oil is applied between the lower surface of the adjusting limit block 31 and the upper machined plane.

[0069] Other transmission mechanisms can be envisioned to convert the linear movement of the telescopic column 13 into the movement of the pointer 10, thereby indicating the corresponding scale corresponding to the linear movement distance of the telescopic column 13.

[0070] The measurement range of the face difference measuring tool 3 can be set, for example, to ±3 mm. And as described above, when the telescopic column 13 of the face difference measuring tool 3 is in the free position, the pointer 10 is aligned with a scale line at one end. The zero scale line is located at the center of the scale, with positive and negative readings on either side. For example, it can be specified that when the telescopic column 13 is in a free, extended state relative to the reference columns 11 and 12, the pointer 10 indicates a negative reading (…). Figure 5 When the telescopic column 13 is in a shortened state relative to the reference columns 11 and 12, the pointer 10 indicates a positive reading (not shown).

[0071] See Figure 8 This describes how to use the surface difference measuring tool 3 of the present invention.

[0072] First, based on the description above, the structure of the surface difference measurement tool 3 is as follows: Figure 5 As shown: the telescopic column 13 passes through a hole in the housing 24 and is fixed to the column 18 or is integrally formed with the column 18; the rack 15 is fixed to the column 18 or is integrally formed with the column 18; the upper end of the column 18 includes a flange 29; the upper end of the positioning rod 30 is fixed to the housing 24, and the other end is inserted into the hollow part of the flange 29; the spring 17 surrounds the positioning rod 30, one end of the spring 17 abuts against the housing 24, and the other end abuts against the flange 29. The telescopic column 13, rod 18, rack 15, and flange 29, which are fixed or integrally formed, can move integrally along... Figure 5 The linear motion shown in the diagram is constrained at the upper end by the positioning rod 30 and at the lower end by the hole in the housing 24 (the hole in the housing through which the telescopic column 13 passes).

[0073] Due to the above structure, when the telescopic column 13 is pressed on its end face 27, the integrated component will move into the housing, and the linearly moving rack 15 will drive the gear 14 to rotate, so the pointer 10 will rotate and indicate the scale on the dial corresponding to the length of the linear movement of the rack; when the pressure is removed, the integrated component will move out of the housing under the action of the spring 17, and the rack 15 will drive the gear 14 to rotate in the opposite direction, so the pointer will return to the initial position.

[0074] An optional adjusting limit block 19 is fixed to the housing 24 by screws and, as described above, its fixed position on the housing 24 can be adjusted. This adjusting limit block 19 can restrict the flange 29 in... Figure 5 The lowest position, i.e., the lowest position of the integrated component along the longitudinal direction, corresponds to the initial position of pointer 10. The highest position of the integrated component along the longitudinal direction can be defined in various ways. For example, when setting the adjusting limit block 19, the interference between the lower end of the adjusting limit block 19 and the screw 16 is adjusted to define the highest position of the integrated component along the longitudinal direction; or the flange 29 can be provided with a circumferential protrusion, and the protrusion and... Figure 5 When the inner part of the housing located above is in contact, the uppermost position of the integral component along the longitudinal direction is defined; and other limiting methods known in the art.

[0075] See Figure 8 When measuring the surface difference between two rear taillights using the surface difference measuring tool 3 of this invention, firstly, the top surface 26 of the two reference posts 11, 12 of the surface difference measuring tool 3 is placed against the surface 21 of one taillight, and the top surface 27 of the telescopic post 13 is placed against the surface 22 of the other taillight. Based on the height difference between the two taillight surfaces 21, 22, the telescopic post 13 will remain stationary or extend / retract along its longitudinal direction. The reading indicated by the pointer 10 is the surface difference value between the two taillight surfaces 21, 22. (Refer to...) Figure 5 The dial 25 can be specified as follows: when the surface of the headlight that the telescopic column 13 abuts against is lower than the surface of the headlight that the reference columns 11 and 12 abut against, the reading is negative; when the surface of the headlight that the telescopic column 13 abuts against is higher than the surface of the headlight that the reference columns 11 and 12 abut against, the reading is positive; and vice versa.

[0076] As described above, the surface difference measuring tool 3 of the present invention is a mechanical surface difference measuring tool, which has low manufacturing cost, simple use process, high detection accuracy, and measurement accuracy can reach ±0.01mm.

[0077] The gap measuring tool 2 and the surface difference measuring tool 3 according to the present invention can be used individually or in combination, such as... Figure 1-8 As shown. When the gap measuring tool 2 and the surface difference measuring tool 3 according to the present invention are combined to form the detection device 1 of the present invention, it is preferable that the side 33 of the gap measuring tool 2 is aligned with the flat surface of the housing 24 of the surface difference measuring tool 3. As described above, the apex angle α of the gap measuring tool 2 is determined so that the size of the entire detection device 1 is suitable for inspection personnel to carry, and the user only needs to carry the detection device 1 of the present invention to complete both gap and surface difference detection.

[0078] The detection device of the present invention has the following advantages:

[0079] 1) Improve measurement accuracy.

[0080] 2) Reduces measurement time and simplifies operation; it allows for direct measurement of gaps and surface differences, eliminating the need for multiple selection and trial measurement steps.

[0081] 3) It integrates two measuring tools into one, making it convenient to use for workstations that require both gap and surface difference inspection.

[0082] From the description provided based on the preferred embodiments, it will be apparent to those skilled in the art that modifications can be made without departing from the scope of the invention as defined by the following claims.

Claims

1. A surface difference measurement tool, comprising: The main body includes a shell, and a scale is provided on the bottom surface of the main body, the scale including multiple scale lines; A pointer is used to indicate the scale lines on the dial; At least two parallel reference posts are fixed to the housing, with one end of each reference post fixed to the housing and the other end extending from the housing at the same height; At least one telescopic column parallel to the reference column and capable of linear movement relative to the housing; as well as A transmission mechanism capable of transmitting the linear motion of the telescopic column to the rotational motion of the pointer. The transmission mechanism includes: A gear that can rotate concentrically and integrally with the pointer; A rack meshing with the gear, one longitudinal end of the rack being fixed to the telescopic column; and An elastic element located between the other longitudinal end of the rack and the housing. Therefore, the rack abuts against the housing via an elastic element, allowing it to move linearly together with the telescopic column and return to its initial position via the elastic element. The surface difference measuring tool further includes a limiting device, which is adjustablely fixed to the housing. The limiting device directly or indirectly abuts against one end of the elastic element to limit the initial position of the elastic element and can adjust the initial position of the elastic element.

2. The face difference measuring tool according to claim 1, characterized in that, The telescopic column passes through a through hole in the housing and is capable of linear movement along the through hole.

3. The face difference measuring tool according to claim 1, characterized in that, The elastic element is a spring.

4. The face difference measuring tool according to claim 1, characterized in that, The transmission mechanism also includes a rod, one end of which is fixed to the telescopic column or integrally formed with the telescopic column, and the other end of which abuts against the housing through the elastic element. The rack is fixed to the rod or integrally formed with the rod.

5. The surface difference measuring tool according to claim 4, characterized in that, The rod comprises two separate parts, which are fixed together with the rack.

6. The face difference measuring tool according to claim 4, characterized in that, The rod includes a first plane, and the rack is fixed to the rod on the first plane.

7. The face difference measuring tool according to any one of claims 4-6, characterized in that, The other end of the rod includes a flange, and one end of the elastic element abuts against the flange.

8. The face difference measuring tool according to any one of claims 4-6, characterized in that, The transmission mechanism also includes a positioning mechanism for guiding the movement of the rack.

9. The face difference measuring tool according to claim 8, characterized in that, The positioning mechanism includes a positioning rod, one end of which is fixed to the housing, and the other end is inserted into the other end of the rod, so that the rod can move linearly along the positioning rod.

10. The face difference measuring tool according to claim 9, characterized in that, The elastic element surrounds the positioning rod.

11. The face difference measuring tool according to claim 1, characterized in that, The limiting device is fixed to the housing by an elongated hole and screws.

12. The face difference measuring tool according to claim 7, characterized in that, The limiting device abuts against the flange to limit the initial position of the elastic element.

13. The face difference measuring tool according to claim 12, characterized in that, The rod includes a second plane, and the lower surface of the limiting device approaches or contacts the second plane of the rod.

14. The face difference measuring tool according to claim 13, characterized in that, Lubrication is applied between the second plane and the lower surface of the limiting device.

15. The face difference measuring tool according to claim 1, characterized in that, A smaller plane is defined at the ends of two reference pillars, and the planes of the two reference pillars are flush with each other and coplanar.

16. The face difference measuring tool according to claim 15, characterized in that, The telescopic column also defines a smaller plane on the top surface of its free end.

17. The face difference measuring tool according to claim 1, characterized in that, The housing has a fan-shaped outer contour on the side near the dial and a straight outer contour on the other sides.

18. The face difference measuring tool according to claim 1, characterized in that, The zero mark in the scale is located in the middle of the multiple scale lines. The scale line on one side indicates a positive reading, and the scale line on the other side indicates a negative reading. When the elastic element is in the initial position, the pointer indicates the scale line at one end of the dial.

19. A gap and surface difference detection device, comprising: A gap measuring tool, and The face difference measuring tool according to any one of claims 1-18, The gap measuring tool includes a wedge-shaped body. The wedge-shaped surface of the wedge-shaped body includes a first side and a second side forming a wedge apex angle α. When the gap measuring tool performs a measurement, the first side abuts against one side of the gap to be measured. Multiple parallel scale lines representing the gap width are located on or near the second side of the wedge-shaped surface. Wherein, the scale line forms a non-perpendicular angle γ with the second side, and the gap to be measured forms an acute angle β with respect to the horizontal line, and the non-perpendicular angle γ satisfies the following condition: γ=β-α, The graduation h on each scale line is determined by the following formula: d×sinα=h, Where d is the distance from the intersection of each scale line and the second side to the vertex of the wedge.

20. The gap and surface difference detection device according to claim 19, characterized in that, The wedge-shaped body also includes two side surfaces, which intersect the wedge-shaped surface at the first side and the second side, respectively. The gap to be measured is formed by two parallel surfaces. When the gap measuring tool performs the measurement, the side surface where the first side is located can fit against one of the surfaces forming the gap to be measured.

21. The gap and surface difference detection device according to claim 19 or 20, characterized in that, According to the predetermined tolerance requirements of the measurement, the qualified scale range is marked on the wedge surface.

22. The gap and surface difference detection device according to claim 19, characterized in that, One side of the gap measuring tool is flush with one side of the surface difference measuring tool.

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