CN114688943A - Gap measuring tool, surface difference measuring tool and measuring device - Google Patents

Abstract

The invention relates to a gap measuring tool, which comprises a wedge-shaped main body, wherein the wedge-shaped surface of the wedge-shaped main body comprises a first edge and a second edge which form a wedge-shaped vertex angle, the first edge is abutted against one side of a gap during measurement, a plurality of parallel scale marks are positioned on the second edge, and the scale marks and the second edge form a non-perpendicular angle. The invention also relates to a surface difference measuring tool comprising: a main body including a housing, and a dial provided on a bottom surface of the main body, the dial including a plurality of scale lines; the pointer is used for indicating the scale marks; at least two parallel reference posts fixed on the housing, one end of each reference post 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 column and capable of linear movement relative to the housing; and a transmission mechanism capable of transmitting the linear motion of the telescopic column to the pointer. The invention also relates to a detection device, which comprises the gap measuring tool and the surface difference measuring tool.

Description

Gap measuring tool, surface difference measuring tool and measuring device

Technical Field

The present invention relates to a gap measuring tool, a surface difference measuring tool, and a measuring apparatus including the gap measuring tool and the surface difference measuring tool.

Background

In industrial production, it is often necessary to check whether the product quality or the assembly quality is within a specified acceptable tolerance. For example, in the assembly process of an automobile, it is necessary to detect whether the size of the gap of the tail lamp is within a predetermined tolerance range, and also to detect whether the height difference (referred to as a surface difference) between the outer surfaces of the tail lamp is within a predetermined tolerance range.

The technical scheme for detection at present adopts a traditional split type clearance gauge and a surface difference gauge to respectively detect a gap between rear tail lamps and a surface difference between the outer surfaces of the rear tail lamps.

The segmented feeler comprises a plurality of elongate thin gauges each having a specific thickness and bearing a corresponding reading thereon, for example 2mm, 1mm, 1/2mm, 1/4mm, etc., each gauge having a specific colour for easy identification, a plurality of gauges being provided for each thickness, all gauges being pivotally connected together at one end in the length direction with respect to each other. When the measuring device is used, for example, when a gap between the rear tail lights of an automobile is detected, a measuring person firstly visually judges the gap between the two rear tail lights, then selects a measuring piece or a measuring piece combination with proper thickness by holding the split-type feeler according to experience, then inserts the selected measuring piece or the measuring piece combination into the gap between the rear tail lights, and makes proper adjustment according to actual conditions. For example, if a selected gauge or gauge combination is too thick to be inserted into the gap between the rear tail lights, a smaller gauge or gauge combination is replaced and inserted into the gap between the rear tail lights; if the selected gauge or gauge combination is too thin to fill the gap when inserted into the taillight gap, and the remaining space is large, the gauge or gauge combination of greater thickness is replaced and inserted into the taillight gap.

This process often requires repeated attempts by the measuring staff based on the experience of the measurement, and the suitable gauge and gauge combination are selected by replacement, so that the size of the gap between the two rear tail lights can be estimated based on the thickness of the finally selected gauge and gauge combination, and thus the operation time is long. And the measuring mode is stepped, the measuring precision cannot be accurate to be less than 0.1mm, and when the measured gap or surface difference value is between two measuring sheet scales, only the measurement can be carried out.

A surface difference gauge used in measuring a surface difference between outer surfaces of rear lights of an automobile is similar to a split-type clearance gauge and includes a plurality of elongated (generally rectangular) thin gauge pieces, one end of which in a length direction is pivotally connected with respect to each other. Except that the other end of each tablet in the length direction is not flat in the width direction but includes a step, the step of each tablet having a specific height and marked thereon with a surface difference reading corresponding to the height of the step thereof, for example, 0.25mm, 0.75mm, 1mm … 2.5.5 mm, 3mm, 3.5mm, 4mm, etc. The first of these gauges typically has no step, i.e., the end of the gauge is flat, so its face difference reading is zero. When the measuring device is used, firstly, a measurer judges the height difference between the outer surfaces of the two rear tail lamps through observation or touch and the like, then, a proper measuring sheet is selected according to experience, the selected measuring sheet spans the gap between the rear tail lamps and is placed on the outer surfaces of the two rear tail lamps, and the two sides of the step of the measuring sheet are respectively abutted against the two outer surfaces of the two sides of the gap. If the two sides of the step can be attached to or approximately attached to the two outer surfaces, estimating a surface difference value according to the reading of the measuring sheet; if one side of the step can not be jointed with the outer surface of the corresponding vehicle lamp and the step and the outer surface of the vehicle lamp are in a visible distance, the measuring sheet with larger or smaller reading is replaced according to which side of the step is not jointed with the outer surface of the vehicle lamp, the above process is repeated until both sides of the step of the measuring sheet can be jointed or approximately jointed with the outer surfaces of the two vehicle lamps, and the reading estimation surface difference value of the measuring sheet is read.

Therefore, the measurement using the surface difference ruler also requires a measuring person to repeatedly replace and select a proper measuring sheet to obtain a final measurement result, so that the operation time is long. And the measurement mode is also stepped, the measurement precision is also an estimated value, the measurement precision depends on the difference value of the readings between the measuring sheets, and the measurement precision is lower.

In the automobile assembling process, the size of the gap of the automobile tail lamp and the surface difference are usually measured at the same station and in the same process, but as mentioned above, a measurer needs to carry two tools to respectively carry out the two measurements, which brings inconvenience to the measurement work.

In summary, the measurement using the conventional split feeler and level-difference gauge in the prior art has the following disadvantages:

1) the step-type measuring mode has lower measuring precision,

2) the operation time is long, the measurement result is unstable, depending on the experience of the measuring personnel,

3) the operation is inconvenient.

Disclosure of Invention

The present invention provides a measuring device that at least partially solves the above technical problems of the prior art. It is therefore an object of the present invention to provide a measuring device which is capable of measuring a gap size and/or a surface difference quickly and in a stepless manner, and which improves the accuracy of the measurement of the gap size and/or the surface difference.

Another object of the present invention is to provide a measuring apparatus which can measure both the gap size and the profile difference, thereby facilitating the measuring work.

A further object of the present invention is to provide a measuring device which is simple in construction and manufacture, low in cost, and with high accuracy of the tool itself.

It is still another object of the present invention to provide a measuring device, which is suitable for being carried about, and further provides convenience for the measurement.

The invention provides a gap measuring tool, which comprises a wedge-shaped main body, wherein the wedge-shaped surface of the wedge-shaped main body comprises a first edge and a second edge which form a wedge-shaped vertex angle alpha, the first edge is abutted against one side of a gap to be measured when the gap measuring tool is used for measuring, and a plurality of parallel scale marks are positioned at or close to the second edge, the gap measuring tool is characterized in that the scale marks and the second edge form a non-vertical angle gamma, the gap to be measured forms an acute angle beta relative to a horizontal line, and the non-vertical angle gamma meets the following conditions: γ ═ β - α. Therefore, during measurement, the scale marks of the gap measuring tool are in a horizontal state and can be read conveniently and accurately.

Preferably, the scale h on each scale mark is determined according to the following formula: and d x sin α ═ h, wherein d is the length of the intersection of each tick mark with said second edge from the apex of the wedge.

Preferably, the wedge-shaped body further comprises two side surfaces intersecting the wedge-shaped surface at a first edge and a second edge, respectively, the gap to be measured is formed by two surfaces parallel to each other, and the side surface where the first edge is located is capable of abutting against one of the surfaces forming the gap to be measured when the gap measuring tool is performing measurement.

Preferably, qualified scale intervals are marked on the wedge-shaped surface according to a preset tolerance requirement, so that measuring personnel can judge the product quality more conveniently.

The application also provides a face difference measuring tool, includes: a main body including a housing and a dial provided on a bottom surface of the main body, the dial including a plurality of scale lines; the pointer is used for indicating the scale marks on the dial; at least two parallel reference posts fixed on the housing, one end of each reference post being fixed on the housing and the other end extending out of the housing by the same height; at least one telescoping post parallel to the reference post and linearly movable relative to the housing; and a transmission mechanism capable of transmitting the linear motion of the telescopic column to the pointer. Therefore, the application provides a mechanical surface difference measuring tool which is simple to use and accurate in measuring result.

Preferably, the telescopic column passes through a through hole on the housing and can move linearly along the through hole.

Preferably, the transmission mechanism comprises: a gear that is rotatable concentrically and integrally with the pointer; the rack is meshed with the gear, and one longitudinal end of the rack is fixed on the telescopic column; and an elastic member, such as a spring, between the other longitudinal end of the rack and the housing, so that the rack abuts against the housing through the elastic member, the rack being linearly movable together with the telescopic column and returned to its original position through the elastic member.

Preferably, the transmission mechanism further comprises a rod, one end of the rod is fixed on or integrated with the telescopic column, the other end of the rod abuts against the housing through the elastic element, and the rack is fixed on or integrated with the rod.

Preferably, the lever includes two separate portions, each of which is fixed integrally with the rack. Thereby facilitating the mounting of the rod in the housing.

Preferably, the rod comprises a first plane, the rack being fixed to the rod in the first plane.

Preferably, said other end of said rod comprises a flange against which one end of said resilient element abuts.

Preferably, the transmission mechanism further comprises a positioning mechanism for guiding the movement of the rack. Preferably, the positioning mechanism includes a positioning rod having one end fixed to the housing and the other end inserted into the other end of the rod so that the rod can move linearly along the positioning rod, and preferably, the elastic member surrounds the positioning rod.

Preferably, the surface difference measuring tool further comprises a limiting device, the limiting device is fixed on the shell, and the limiting device directly or indirectly abuts against one end of the elastic element and is used for limiting the initial position of the elastic element.

Preferably, the stop means is adjustably fixed to the housing so as to be able to adjust the initial position of the resilient element, for example, the stop means is fixed to the housing by means of an elongated hole and a screw.

Preferably, the stop means abuts against the flange for limiting the initial position of the resilient element.

Preferably, the rod comprises a second flat surface, the lower surface of the stop means being close to or in contact with the second flat surface of the rod, preferably with a lubricating measure applied between the second flat surface and the lower surface of the stop means.

Preferably, the smaller planar top surfaces are defined at the ends of two reference posts, said planar top surfaces of two said reference posts being flush and coplanar with each other, and preferably the top surfaces of said telescopic posts at their free ends also define the smaller planar surface.

Preferably, the housing has a scalloped outer contour on one side adjacent the dial and a flat outer contour on the other side.

Preferably, a zero scale line of the scale lines is located at the middle of the plurality of scale lines, the scale line on one side thereof is marked with a positive reading, the scale line on the other side is marked with a negative reading, and the pointer indicates the scale line at one end of the dial when the elastic member is in the initial position.

The present application further provides a detection device, including: according to the aforementioned gap measuring tool, and according to the aforementioned surface difference measuring tool.

Preferably, one side of the gap measuring means is flush with one side of the surface difference measuring means.

The measuring device of the invention has the following advantages:

1) the gap size and/or the surface difference can be measured quickly, and the measurement accuracy of the gap size and/or the surface difference is improved;

2) the device can measure the size sum and the surface difference of the gap, so that the measurement operation is convenient;

3) the structure and the manufacture are simple, the cost is low, and the tool has high precision;

4) the size is suitable for being carried about, and further convenience is provided for measurement work.

Drawings

The accompanying drawings illustrate preferred embodiments of the invention, in which:

fig. 1 shows a perspective view of a measuring device according to the invention;

FIG. 2 shows a front view of a measuring device according to the invention;

FIG. 3 shows a right side view of a measuring device according to the present invention;

FIG. 4 shows a bottom view of a measuring device according to the present invention;

FIG. 5 is a front view similar to FIG. 2 of a measuring device according to the present invention with a panel removed to show internal structure;

FIG. 6 is a schematic view showing the measurement of the gap between two tail lights of an automobile using a measuring device according to the present invention;

FIG. 7 is a schematic diagram showing a close-up view of the gap measured in FIG. 6 using a measuring device according to the present invention;

fig. 8 is a schematic view showing a measurement of a surface difference between outer surfaces of two tail lights for automobiles using the measuring device according to the present invention.

Detailed Description

Referring to fig. 1-5, a measuring device 1 according to the present invention is shown. As shown, the measuring device 1 of the invention comprises two parts: the gap measuring means 2 and the surface difference measuring means 3 may be assembled together as a single unit as shown in the drawing, or may be two separate and used individually.

As shown in fig. 1, 2 and 5, the gap measuring tool 2 comprises a wedge-shaped body, wherein the wedge surface comprises two intersecting edges 4 and 5 and an acute angle α (see fig. 7). The wedge-shaped body may also comprise two opposite side surfaces, one on each side of the wedge-shaped face, wherein one side surface 33 meets the wedge-shaped face at the edge 4.

The longitudinal length l of the measuring tool determines the overall size of the measuring tool, the size of the vertex angle alpha determines the size of the length l, the larger the vertex angle alpha is, the shorter the length l is, the denser the scale marks on the measuring tool are, the smaller the vertex angle alpha is, the longer the length l is, and the thinner the scale marks on the measuring tool are. Therefore, the appropriate vertex angle α is selected according to the actual conditions such as the required length of the gap measuring tool 2 and the density of the scale marks. For example, when the gap measuring tool 2 is used alone, it may have a larger length l, and thus a smaller apex angle α may be used; when the gap measuring means 2 and the surface difference measuring means 3 are fixed together into an integral device 1, a larger vertex angle α can be used, thereby keeping the overall size of the measuring device 1 small and facilitating the carrying and use of the measuring personnel.

Referring to fig. 2, 5 and 7, the graduation marks 6 of the gap measuring tool 2 are not perpendicular to the wedge-shaped edge 5, but form an angle γ with the wedge-shaped edge 5. The following is a detailed description of how the angle y is determined and the readings of the respective graduation marks 6 in connection with the use of the gap measuring tool 2.

Referring to fig. 7, there is shown an enlarged partial view of the gap measured using the gap measuring tool 2 according to the present invention, with the readings of the various graduation marks 6 omitted for clarity. In use, the wedge-shaped gap measuring tool 2 is inserted into the gap 7 between the two rear headlights of a motor vehicle such that the side 33 on which the one edge 4 forming the wedge-shape abuts one side of the gap 7. At this time, the other side 5 forming the wedge shape is at the scale corresponding to the point a at the opening of the slit 7, i.e. the width of the slit 7. As shown in fig. 7, when the side 33 of the wedge-shaped gap measuring tool 2 on which the one side 4 is located abuts on the one side of the gap 7, the graduation marks 6 of the gap measuring tool 2 are preferably parallel to the horizontal line of the opening of the gap 7.

As described above, in 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, the density of scale lines, and the like), and the inclination angle β of the rear lamp itself (see fig. 7) is also known (automobile design parameter). With continued reference to fig. 7, since the two sides 8, 9 forming the slit 7 are parallel to each other, the angle between the wedge-shaped side 5 and the slit side 9 is α, and also since the two sides 8, 9 forming the slit 7 are parallel to each other, the following equation holds:

γ + α, and thus γ - α,

thereby determining the angle gamma between the edge 5 of the gap measuring tool 2 and the wedge.

The scale of the gap-measuring tool 2, i.e. the reading of each graduation mark 6, needs to be determined. It is noted that the reading of the graduation marks 6 represents the vertical or shortest distance between the parallel sides 8, 9 forming said slit 7, which is called the width w of the slit. Still referring to fig. 7, the distance d from the apex B of the gap measuring tool 2 to the intersection between each tick mark 6 and the side 5 is a known number, and if a perpendicular is made from the intersection between one tick mark 6 and the wedge-shaped side 5 to either side 8, 9, the length h of the perpendicular corresponds to the width w of the gap. Thus, for example, in the right triangle ABC shown in fig. 7, the following equation holds:

d×sinα＝h，

since d and α are both known numbers, the calculated h is the reading of the tick mark 6. Qualified scale intervals can be marked on the gap measuring tool 2 according to preset tolerance requirements, for example, by different colors, so that measuring personnel can judge the product quality more conveniently.

Therefore, the apex angle α of the gap measuring tool 2, the inclination angle γ of the scale lines, and the readings of the respective scale lines are determined in the above method, thereby obtaining the gap measuring tool 2 according to the present invention. The invention does not adopt the traditional measuring sheet type measuring method, but uses the wedge-shaped measuring scale to measure the gap, designs the inclined scale mark suitable for reading according to the special angle of the appearance of the rear tail lamp, and has convenient and accurate reading and measuring precision reaching 0.02 mm.

The structure and use of the surface difference measuring device 3 will be described below with reference to fig. 1 to 5 and 8. The mechanical measuring device 1 of the present invention is shown in fig. 5, in which a panel 23 (see fig. 2) is removed to show the internal structure of the surface difference measuring tool 3.

The surface difference measuring tool 3 according to the present invention mainly includes: a main body 20 including a panel 23 and a housing 24, a dial 25 such as a sector shape being provided on a bottom surface of the main body 20, the housing 24 preferably having a sector-shaped outer contour on one side of the dial 25 and a flat outer contour on the other side; a pointer 10 for indicating scales on the dial 25; at least two parallel reference posts 11, 12 fixed to said housing 24, each reference post having one end fixed to said housing 24 and the other end extending from said housing and defining a smaller planar top surface 26 at its distal end, said planar top surfaces 26 of said two reference posts 11, 12 being flush and coplanar with each other; at least one telescopic column 13 parallel to said reference columns 11, 12 and capable of linear movement with respect to said housing 24, for example said telescopic column 13 passing through a hole (not visible in fig. 5) in the housing and capable of linear movement along said hole, the top surface of said telescopic column 13 at its free end also defining a smaller plane 27; and a transmission mechanism 28 capable of transmitting the linear movement of said telescopic column 13 to the cursor 10.

According to the embodiment shown in fig. 5, the transmission mechanism 28 mainly comprises: a gear 14 fixed on a bottom surface of the body 20, capable of rotating concentrically with the pointer 10; a rack 15 engaged with the gear 14; a rod 18, one end of said rod 18 being fixed to or integral with said telescopic column 13, the other end of said rod 18 comprising a flange 29, said rack 15 being fixed to said rod 18, for example by means of at least one screw 16, or integral with said 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 member 29 and/or the hollow portion of the rod; and a spring 17 sleeved on the positioning rod 30, wherein one end of the spring is abutted against the shell 24, and the other end of the spring is abutted against the flange piece 29.

Preferably, the transmission mechanism 28 further comprises an adjustment stopper 19 fixed to the housing 24, for example by means of a screw 31, and abutting against the flange member 29 on the side opposite to the spring 17, so as to limit the position of the lower end of the spring 17 in fig. 5. 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 stopper 19 needs to be adjusted so that the pointer 10 is aligned with the end scale of the dial 25. To this end, the adjustment stopper 19 may include an elongated hole (not shown), a circular threaded hole is provided in the housing 24, and the screw 31 is screwed into the circular threaded hole in the housing through the elongated hole in the adjustment stopper 19, thereby fixing the adjustment stopper 19 to the housing 24. Of course, it is also possible to provide the housing 24 with an elongated hole and the adjustment stop 19 with a circular threaded hole. In adjusting the initial position of the pointer 10, the screw 31 is first loosened, and the adjustment stopper 19 is moved in the longitudinal direction (up-down direction in fig. 5) of the elongated hole of the lever 18 to adjust the longitudinal position of the adjustment stopper 19 on the housing 24, thereby adjusting the initial position of the pointer, and the screw 31 is retightened after the adjustment is completed.

Preferably, for the sake of mounting, the rod 18 is formed to comprise two separate parts, which are respectively fixed to the rack 15 by means of screws 16. Preferably, the shank 18 is a cylindrical shank and the rack is a planar member machined to form two parallel planar surfaces at diametrically opposed locations on the cylindrical shank 18 for ease of installation, with only the upper machined planar surface 32 being shown in fig. 5, and the lower machined planar surface parallel and diametrically opposed thereto not being visible in fig. 5, through which threaded bores are formed. So that the flat rack 15 abuts the lower machined surface of the bar 18 and the screw 16 is screwed onto the upper machined surface 32 through a threaded hole in the bar 18. The lower surface of the adjustment stopper 31 is in contact with the upper processing plane, and lubricating oil is applied between the lower surface of the adjustment stopper 31 and the upper processing plane in order to facilitate relative movement of the lever 18 with respect to the adjustment stopper 19 (which will be described in detail later).

Other transmission mechanisms are conceivable for converting the linear movement of the telescopic column 13 into the movement of the pointer 10, so that the corresponding scale is indicated corresponding to the linear movement distance of the telescopic column 13.

The measurement range of the surface difference measuring tool 3 may be set to, for example, ± 3 mm. And as mentioned above, when the telescopic column 13 of the face difference measuring tool 3 is in the free position, the pointer 10 is aligned with the graduation mark of one end. The zero scale mark is positioned at the center of the dial, and positive reading and negative reading are respectively arranged on the two sides of the dial. For example, it may be provided that said pointer 10 indicates a negative reading when the telescopic column 13 is in the extended free state with respect to the reference columns 11, 12 (fig. 5), said pointer 10 indicates a positive reading when the telescopic column 13 is in the shortened state with respect to the reference columns 11, 12 (not shown).

Referring to fig. 8, a method of using the surface difference measuring tool 3 of the present invention is explained.

First, the structure of the surface difference measuring tool 3 is known from the above description, as shown in fig. 5: the telescopic column 13 is fixed to the column 18 or is integral with the column 18 through a hole in the housing 24; the rack 15 is fixed to the column 18 or is formed integrally with the column 18; the upper end of the post 18 includes a flange member 29; the upper end of the positioning rod 30 is fixed on the shell 24, and the other end is inserted into the hollow part of the flange member 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 member 29. The telescopic column 13, the rod 18, the rack 15, and the flange member 29, which are fixed or formed integrally, are linearly movable integrally in the up-down direction shown in fig. 5, and the linear movement direction of the integral member is restrained by the positioning rod 30 at the upper end and by the hole in the housing 24 (the hole in the housing through which the telescopic column 13 passes) at the lower end.

Due to the above structure, when the telescopic column 13 is pressed on the end face 27 thereof, the integral part will move towards the inside of the casing, the rack 15 moving linearly drives the gear 14 to rotate, and therefore the pointer 10 rotates, indicating on the dial the scale corresponding to the length of the linear movement of the rack; when the pressure is removed, the integral part moves outwards of the housing under the action of the spring 29, the rack 15 rotates the pinion 14 in the opposite direction, and the cursor therefore returns to the initial position.

The optional adjustment stop 19 is fixed to the housing 24 by screws and is adjustable in its position on the housing 24 as described above. The adjustment stopper 19 can restrict the lowermost position of the flange member 29 in fig. 5, i.e., the lowermost position of the integral unit in the longitudinal direction, corresponding to the initial position of the pointer 10. The uppermost position of the integral part in the longitudinal direction may be defined in various ways. For example, when the adjustment stopper 19 is provided, the interference between the lower end of the adjustment stopper 19 and the screw 16 defines the uppermost position of the integrated member in the longitudinal direction; or the flange member 29 may be provided with a circumferential projection which, when in contact with the interior of the housing, which is located above in figure 5, defines the uppermost position of the integral part in the longitudinal direction; and other means of retention known in the art.

Referring to fig. 8, when the surface difference between the two rear lamps is measured by the surface difference measuring tool 3 of the present invention, the planar top surfaces 26 of the two reference posts 11, 12 of the surface difference measuring tool 3 are first abutted against the surface 21 of one of the lamps, the planar top surface 27 of the telescopic post 13 is abutted against the surface 22 of the other lamp, the telescopic post 13 is kept still or is telescopic in its longitudinal direction according to the height difference between the two lamp surfaces 21, 22, and the reading indicated by the pointer 10 is the surface difference value between the two lamp surfaces 21, 22. Referring to the scale 25 of fig. 5, it may be provided that: when the surface of the lamp against which the telescopic column 13 abuts is lower than the surface of the lamp against which the reference columns 11, 12 abut, the reading is negative; when the surface of the lamp against which the telescopic column 13 abuts is higher than the surface of the lamp against which the reference columns 11, 12 abut, the reading is positive; and vice versa.

As described above, the surface difference measuring tool 3 of the present invention is a mechanical surface difference measuring tool, and has the advantages of low manufacturing cost, simple use process, high detection precision, and measurement precision up to +/-0.01 mm.

The gap measuring tool 2 and the surface difference measuring tool 3 according to the present invention may be used alone or in combination as shown in fig. 1 to 8. When the gap measuring tool 2 and the surface difference measuring tool 3 according to the present invention are combined together into the inspection device 1 of the present invention, it is preferable that the side face 33 of the gap measuring tool 2 be aligned with the flat surface of the case 24 side of the surface difference measuring tool 3. As described above, the vertex angle α of the gap measuring tool 2 is determined, so that the size of the whole detecting device 1 is suitable for the detecting person to carry, and the user can complete the gap and surface difference detection only by carrying the detecting device 1 of the present invention.

The invention is qualified by the detection of the Liaoning institute of measurement.

The detection device of the invention has the following advantages:

1) the measurement precision is improved, and the measurement accuracy is improved,

2) the measuring time is reduced, the operation is simple, the degree can be directly measured no matter the gap and the surface difference are measured, the step of selecting the test quantity slices for many times is omitted,

3) two measuring tools are integrated, and the device is convenient to use and aims at stations required by gap and surface difference detection.

From the description provided of the preferred embodiments, it is clear that a person skilled in the art may make modifications without thereby departing from the scope of the invention as defined by the following claims.

Claims (10)

1. A gap measuring tool comprising a wedge-shaped body, the wedge-shaped surface of which comprises a first edge and a second edge forming a wedge apex angle alpha, the first edge abutting against a side of a gap to be measured when the gap measuring tool is performing a measurement, a plurality of parallel graduation marks being located at or near the second edge,

characterized in that the graduation mark forms a non-perpendicular angle γ with the second side, the gap to be measured forms an acute angle β with respect to the horizontal, the non-perpendicular angle γ satisfying the following condition:

γ＝β-α。

2. the gap measuring tool of claim 1 wherein the scale h on each scale mark is determined according to the following equation:

d×sinα＝h，

wherein d is the length of the intersection of each tick mark with the second edge from the apex of the wedge.

3. The gap measuring tool according to claim 1 or 2, wherein the wedge-shaped body further comprises two side surfaces intersecting the wedge-shaped surface at a first edge and a second edge, respectively, the gap to be measured being formed by two surfaces parallel to each other, the side surface where the first edge is located being able to abut against one of the surfaces forming the gap to be measured when the gap measuring tool is performing a measurement.

4. A gap measuring tool as claimed in any one of claims 1 to 3, wherein acceptable scale intervals are marked on the wedge face according to predetermined tolerance requirements for measurement.

5. A surface difference measuring tool comprising:

a main body including a housing and a dial provided on a bottom surface of the main body, the dial including a plurality of scale lines;

the pointer is used for indicating the scale marks on the dial;

at least two parallel reference posts fixed on the housing, one end of each reference post 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 column and capable of linear movement relative to the housing; and

a transmission mechanism capable of transmitting the linear motion of the telescopic column to the pointer.

6. The surface difference measuring tool of claim 5, wherein the telescopic post passes through a through hole in the housing and is linearly movable along the through hole.

7. The surface difference measuring tool according to claim 5 or 6, wherein the transmission mechanism includes:

a gear that is rotatable concentrically and integrally with the pointer;

the rack is meshed with the gear, and one longitudinal end of the rack is fixed on the telescopic column; and

an elastic member, such as a spring,

the rack is thus abutted against the housing by the elastic member, and the rack is capable of linear movement together with the telescopic column and is returned to its original position by the elastic member.

8. The surface difference measuring tool according to claim 7, wherein the transmission mechanism further comprises a rod, one end of which is fixed to or integrated with the telescopic post, the other end of which abuts against the housing through the elastic member, and the rack is fixed to or integrated with the rod.

9. The surface difference measuring tool as claimed in claim 8, wherein the rod includes two separate portions, each of which is fixed integrally with the rack.

10. A surface difference measuring tool according to claim 8 or 9, wherein said rod comprises a first planar surface, said rack being fixed to said rod in said first planar surface.

Images