CN211717313U - Aperture gauge - Google Patents

Abstract

The application relates to measuring tool technical field, discloses an utensil is examined to aperture includes: a body including one or more contact portions for contacting an inner wall of the hole; the rotating device is hinged with the body and can enable the body to rotate along a hinged point; the measuring device is movably arranged on the body relative to the contact part and at least partially extends out of the body. The inner diameter of the hole can be measured only by rotating the body back and forth for a plurality of times, and the operation is simple and convenient.

Description

Aperture gauge

Technical Field

The application relates to the technical field of measuring tools, for example to an utensil is examined to aperture.

Background

In actual production, a plurality of special holes are often encountered, namely the hole diameter of the outer end is smaller and the hole diameter of the inner end is larger. At present, with the popularization of numerical control machine tools, the processing requirements of the special holes can be basically met, but the problem that the diameter of each part of the special hole is detected in the production process is always unsolved. At present, a factory generally adopts three-coordinate measurement, and three-coordinate detection needs special equipment and is complex to operate, so that the aperture of a special hole cannot be conveniently measured in a part machining field.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides an aperture checking fixture to solve the technical problem that the existing measuring equipment cannot conveniently measure the aperture of a special hole.

In some embodiments, the aperture gauge comprises: a body including one or more contact portions for contacting an inner wall of the hole; the rotating device is hinged with the body and can enable the body to rotate along a hinged point; the measuring device is movably arranged on the body relative to the contact part and at least partially extends out of the body.

The aperture detection tool provided by the embodiment of the disclosure can realize the following technical effects: when measuring, rotary device makes the body rotatory certain angle to inside stretching into the hole with body and the measuring device who sets up on the body, then continue to make measuring device remove under the contact force effect of downthehole wall through continuing to rotate the body, thereby confirm the internal diameter in hole, only need make a round trip to rotate the body like this just can measure out the internal diameter of hole several times, easy operation is convenient.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a front view of an aperture gauge provided by an embodiment of the present disclosure;

FIG. 2 is a top view of an aperture gauge provided by embodiments of the present disclosure;

fig. 3 is a schematic view of a measurement state of an aperture gauge provided by the embodiment of the disclosure.

Reference numerals:

1: a body; 2: a measuring device; 3: a contact portion; 4: an elastic member; 5: a bolt; 6: a nut; 7: a first support bar; 8: a second support bar; 9: a rotating device; 100: a bore diameter gauge; 200: and (5) a workpiece to be detected.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

As shown in fig. 1-3, in some embodiments the aperture gauge 100 includes a body 1, a rotation device 9, and a measurement device 2. The body 1 is generally of a plate-like structure, for example a rectangular plate, on one end of which along the long side a contact portion 3 is provided for contacting the inner wall of the hole, and on the other end a measuring device 2 is provided, the measuring device 2 being capable of moving towards or away from the contact portion 3. The body 1 may also have other shapes, such as a star shape, with a contact portion 3 provided along the end of a plurality of spokes radiating in the star shape, one of which is provided with a measuring device 2. The contact portion 3 and the body 1 may be integrally formed, or may be detachably connected, for example, fixed to the body 1 by bolts or clamping. Therefore, different contact parts 3 can be replaced according to the size of the actual workpiece 200 to be measured and the measuring working condition, and the measurement is convenient.

The measuring device 2 is movably arranged on the body 1 relative to the contact part 3 and at least partially extends out of the body 1. During measurement, the measuring device 2 is in contact with the inner wall of the hole of the workpiece 200, and the contact portion 3 disposed on the body 1 is also in contact with the inner wall of the hole of the workpiece 200, and the change in the diameter of the inner wall of the hole forces the measuring device 2 to move relative to the moving portion to adapt to the size of the hole. The movement of the measuring device 2 relative to the contact part 3 is normally an irreversible movement, i.e. it cannot be restored to its original position by its own action after a change of position by the inner wall of the hole or by human force. Thus, the change of the measured value can be prevented in the process of taking out the aperture checking fixture 100 or reading after the measurement is completed.

And the rotating device 9 is hinged with the body 1 and can enable the body 1 to rotate along a hinged point. Alternatively, the rotation device 9 may be powered electrically or by other forms of power to effect rotation of the body 1 about the hinge point relative to the rotation device 9, or to artificially control rotation of the body 1.

The principle of measurement is as follows: the outer end of the special-shaped hole is small in aperture, the inner end of the special-shaped hole is large in aperture, and the size of the body 1 of the common aperture detection tool 100 is matched with the size of the aperture to be detected, so that the aperture detection tool 100 cannot directly enter the region to be detected of the inner end hole through the outer end hole smaller than the size of the outer end hole. The aperture detection tool 100 enables the body 1 to rotate by a certain angle through the rotating device 9, so that the size of the body 1 in the radial direction of a hole to be detected is reduced, and the small hole in the outer end can smoothly enter a region to be detected. After entering the area to be measured, the body 1 is rotated back and forth through the rotating device 9, the measuring device 2 moves relative to the contact part 3 under the action of the inner wall of the hole, and the measuring device 2 and the contact part 3 are always in contact with the inner wall of the hole in the moving process. After the measurement is completed, the body 1 is rotated again by the rotating device 9, and the aperture checking fixture 100 is taken out. And finally, the aperture to be measured is obtained by reading the distance and the angle of the relative contact of the measuring device 2.

In some embodiments, the body 1 comprises two contacts 3, the measuring device 2 being moved along a perpendicular bisector of a line connecting the two contacts 3. Alternatively, the body 1 is an isosceles triangle, the contact parts 3 are arranged on two base angles of the isosceles triangle, and the measuring device 2 is arranged on a vertex angle and moves along the center line of the isosceles triangle. The diameter of the hole to be measured is determined by the contact of the three points with the inner wall of the hole to be measured, so that the measurement error is greatly reduced.

In some embodiments, the body 1 is provided with a chute along which the measuring device 2 translates. The body 1 is provided with a dovetail-shaped sliding groove, and the measuring device 2 is matched with the sliding groove and can move horizontally along the sliding groove. Optionally, the surface of the chute and the surface of the measuring device 2 are coated with a high hardness to improve the wear resistance of the chute and the measuring device 2. Optionally, a mesh-shaped groove is formed in the surface of the sliding chute, and lubricating oil is filled in the groove to further reduce friction between the sliding chute and the measuring device 2.

In some embodiments, the measuring device 2 is elastically fixed in the direction of the normal of the contact surface with the chute. Optionally, the measuring device 2 is provided with a long hole along the moving direction, a through hole is formed in the corresponding position of the body 1, and the bolt 5 sequentially penetrates through the body 1, the measuring device 2 and the elastic piece 4 from the bottom surface of the body and then is in threaded connection with the nut 6, so that the measuring device 2 is fixed on the body. Thus, the bolt 5 presses the measuring device 2 on the body 1 through the elastic piece 4, and under the action of the elastic force of the elastic piece 4, the measuring device 2 can not move autonomously under the action of gravity, and can also move under the action of the inner wall of the hole to finish measurement.

In some embodiments, the rotation means 9 are hinged to the body 1 by two hinge points. Alternatively, the rotating device 9 comprises two cylinders, the ends of the two cylinders are connected with the body 1 in a hinged manner, and the body 1 rotates at a certain angle relative to the two hinged points along with the extension or contraction of the two cylinders.

In some embodiments, the rotation means 9 comprise a first support bar 7 and a second support bar 8, one end of each of which is hinged to the body 1, the body 1 being rotated by the movement of the two support bars in opposite directions of its axis. Optionally, the two support rods are arranged in parallel and are aligned with the body 1 in the measuring position. Thus, the body 1 can be rotated by a certain angle through the movement of the two support rods along the direction of the axis of the body. Alternatively, the support bars are symmetrically arranged along the midpoint between the measuring device 2 and the contact portion 3.

In some embodiments, the two support rods are provided with markings at the same length from the respective hinge point. When the line connecting the two marks is perpendicular to the axis of the hole, the body 1 is also perpendicular to the axis of the hole, and is right at the measuring position. Alternatively, the marker can be made of fluorescent material, and the posture of the body 1 can be conveniently judged when the measurement environment is dim.

In some embodiments, the tip of the contact portion 3 and/or the measurement portion is rounded. Optionally, the diameter of the circular arc is adapted to the diameter of the hole to be measured, for example, slightly smaller than the diameter of the hole to be measured, so that the contact portion 3 and the measuring device 2 better fit with the inner wall of the hole, and the measurement accuracy is improved.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. Each embodiment may be described with emphasis on differences from other embodiments, and like parts may be referred to each other between the respective embodiments. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the first element are renamed consistently and all occurrences of the second element are renamed consistently. The first and second elements are both elements, but may not be the same element.

Claims (10)

1. An utensil is examined to aperture, its characterized in that includes:

a body including one or more contact portions for contacting an inner wall of the hole;

the rotating device is hinged with the body and can enable the body to rotate along a hinged point;

the measuring device is movably arranged on the body relative to the contact part and at least partially extends out of the body.

2. The aperture gauge of claim 1, wherein the body comprises a contact portion, and the measuring device is movable toward and away from the contact portion.

3. The aperture gauge of claim 1, wherein the body comprises two contact portions, and the measuring device moves along a perpendicular bisector of a line connecting the two contact portions.

4. The aperture gauge of claim 2 or 3, wherein the body is provided with a sliding groove along which the measuring device translates.

5. The aperture gauge of claim 4, wherein the measuring device is resiliently fixed in a direction normal to a contact surface with the chute.

6. The aperture gauge of claim 1, wherein the rotation device is hinged to the body by two hinge points.

7. The aperture gauge of claim 6, wherein the rotating device comprises a first support rod and a second support rod, one end of each of the first support rod and the second support rod is hinged to the body, and the body is rotated by the first support rod and the second support rod moving in opposite directions along the axis of the body.

8. The aperture inspection tool according to claim 7, wherein the first support bar and the second support bar are provided with marks at the same distance from the respective hinge points.

9. The aperture gauge of claim 1, wherein the contact portion has a rounded distal end.

10. The aperture gauge of claim 1, wherein the end of the measuring device protruding out of the body portion is rounded.

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