CN109931852B - Blind hole depth auxiliary measuring tool and blind hole depth measuring device - Google Patents

Blind hole depth auxiliary measuring tool and blind hole depth measuring device Download PDF

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CN109931852B
CN109931852B CN201910148307.9A CN201910148307A CN109931852B CN 109931852 B CN109931852 B CN 109931852B CN 201910148307 A CN201910148307 A CN 201910148307A CN 109931852 B CN109931852 B CN 109931852B
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blind hole
transition rod
depth
hole depth
transition
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CN109931852A (en
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曾庆飞
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Wuhan Marine Machinery Plant Co Ltd
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Wuhan Marine Machinery Plant Co Ltd
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Abstract

The invention discloses a blind hole depth auxiliary measuring tool and a blind hole depth measuring device. The auxiliary measuring tool for the depth of the blind hole comprises an installation cylinder, a transition rod, a return spring and a threaded compression ring, wherein the transition rod is coaxially inserted into the installation cylinder. Can insert the installation section of thick bamboo when measuring in the blind hole of awaiting measuring, make benchmark outward flange paste with the workpiece surface mutually, the measuring stick of the micrometer of the degree of depth offsets with the terminal surface of the second end of transition rod, promote the transition rod through the measuring stick and contact bottom the blind hole, because before inserting the installation section of thick bamboo in the blind hole, the distance between the terminal surface of the first end of transition rod and the benchmark outward flange can obtain in advance, the distance that the micrometer of adjusting degree of depth promotes the transition rod and removes can obtain through the micrometer of the degree of depth, the distance between the terminal surface of the first end of transition rod and the benchmark outward flange, the distance that the micrometer of adjusting degree of depth promotes the transition rod and removes both sums of distance is the degree of depth of blind hole promptly. The measuring range of the depth micrometer is improved, and the blind hole with larger depth can be measured.

Description

Blind hole depth auxiliary measuring tool and blind hole depth measuring device
Technical Field
The invention relates to the field of measuring tools, in particular to a blind hole depth auxiliary measuring tool and a blind hole depth measuring device.
Background
Blind holes are holes that connect the surface and inner layers of a workpiece without penetrating the workpiece. Such as a hole in which a stud is partially inserted.
The depth of the blind hole is usually measured after the blind hole is drilled on the surface of the workpiece, so that other structures can be conveniently matched with the blind hole.
At present, a depth micrometer is usually adopted to measure the depth of a blind hole, the measuring range of the depth micrometer is usually smaller and is generally only 100mm, the depth micrometer with the larger measuring range is only about 300mm, and the deeper blind hole cannot be measured.
Disclosure of Invention
The embodiment of the invention provides a blind hole depth auxiliary measuring tool and a blind hole depth measuring device, which can increase the measuring range of a depth micrometer. The technical scheme is as follows:
on one hand, the embodiment of the invention provides a blind hole depth measuring device which comprises an installation cylinder, a transition rod, a return spring and a threaded compression ring, the outer wall of the mounting cylinder is provided with a reference outer flange, the first end of the mounting cylinder is provided with a limiting inner flange, the transition rod is coaxially inserted into the mounting cylinder, the first end of the transition rod is positioned outside the first end of the mounting cylinder, the second end of the transition rod is positioned in the mounting cylinder, the outer wall of the transition rod is provided with a limiting outer flange, the reset spring is coaxially sleeved outside the transition rod, two ends of the reset spring are respectively abutted against the limiting outer flange and the limiting inner flange, the threaded press ring is positioned in the installation cylinder and is in threaded connection with the inner wall of the installation cylinder, the screw thread clamping ring with spacing outward flange contact, spacing outward flange is located the screw thread clamping ring with between the reset spring.
Optionally, the transition rod has zero set graduation lines on the outer wall.
Optionally, the distance from the zero setting scale line to the end face of the second end of the transition rod along the axial direction of the transition rod is equal to the distance from the end faces of the two ends of the mounting cylinder.
Optionally, the auxiliary measuring tool comprises a plurality of said transition rods of different lengths.
Optionally, the end surface of the first end of the transition rod is spherically convex.
Optionally, the difference between the inner diameter of the limiting inner flange and the outer diameter of the transition rod is not more than 0.1 mm.
Optionally, the mounting barrel further comprises a protective cover detachably disposed at the second end of the mounting barrel.
Optionally, a sealing gasket is clamped between the protective cover and the second end face of the mounting barrel.
Optionally, the auxiliary measuring tool is a metal structural member.
In another aspect, an embodiment of the present invention provides a blind hole depth measuring apparatus, which includes the blind hole depth auxiliary measuring tool according to the first aspect.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least: through setting up an installation section of thick bamboo, transition pole and reset spring, the first end of an installation section of thick bamboo has spacing interior flange, and the coaxial cartridge of transition pole has spacing exterior flange on the outer wall of transition pole in an installation section of thick bamboo, and the coaxial cover of reset spring is established outside the transition pole, and reset spring's both ends are supported respectively and are leaned on spacing exterior flange and spacing interior flange, and through setting up the screw clamping ring, the screw clamping ring can be pressed spacing exterior flange on reset spring. Because the first end of transition pole is located outside the first end of installation section of thick bamboo, when the second end of promotion transition pole like this, reset spring compression changes, and the length that the first end of transition pole stretches out the installation section of thick bamboo will change. Because the outer wall of the mounting cylinder is provided with the reference outer flange, the first end of the mounting cylinder can be inserted into the blind hole to be measured during measurement, so that the reference outer flange is attached to the surface of a workpiece, then, a base of the depth micrometer is tightly attached to the end face of the second end of the mounting cylinder by using the depth micrometer, a measuring rod of the depth micrometer is abutted against the end face of the second end of the transition rod, the depth micrometer is adjusted, the transition rod is pushed to be in contact with the bottom of the blind hole by the measuring rod, since the distance between the end face of the first end of the transition rod and the reference outer flange can be obtained in advance before the mounting cylinder is inserted into the blind hole, for example, the blind hole depth adjusting device is obtained by measuring, the distance for adjusting the depth micrometer to push the transition rod to move can be obtained by the depth micrometer, and the sum of the distance between the end face of the first end of the transition rod and the reference outer flange and the distance for adjusting the depth micrometer to push the transition rod to move is the depth of the blind hole. The measuring range of the depth micrometer is improved, and the blind hole with larger depth can be measured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a blind hole depth auxiliary measuring tool according to an embodiment of the present invention;
fig. 2 is a schematic view of a usage status of a blind hole depth measuring device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a blind hole depth auxiliary measuring tool according to an embodiment of the present invention. As shown in fig. 1, the blind hole depth auxiliary measuring tool comprises a mounting cylinder 10, a transition rod 20, a return spring 30 and a threaded compression ring 40.
The outer wall of the mounting cylinder 10 is provided with a reference outer flange 11, and the first end of the mounting cylinder 10 is provided with a limiting inner flange 12.
The transition rod 20 is coaxially inserted into the mounting cylinder 10, a first end of the transition rod 20 is located outside the first end of the mounting cylinder 10, and a second end of the transition rod 20 is located inside the mounting cylinder 10. The transition rod 20 has a limiting outer flange 21 on its outer wall.
The reset spring 30 is coaxially sleeved outside the transition rod 20, and two ends of the reset spring 30 respectively abut against the limiting outer flange 21 and the limiting inner flange 12. The threaded collar 40 is located within the mounting cylinder 10. The threaded compression ring 40 is in threaded connection with the inner wall of the installation barrel 10, the threaded compression ring 40 is in contact with the limiting outer flange 21, and the limiting outer flange 21 is located between the threaded compression ring 40 and the return spring 30.
Through setting up an installation section of thick bamboo, transition pole and reset spring, the first end of an installation section of thick bamboo has spacing interior flange, and the coaxial cartridge of transition pole has spacing exterior flange on the outer wall of transition pole in an installation section of thick bamboo, and the coaxial cover of reset spring is established outside the transition pole, and reset spring's both ends are supported respectively and are leaned on spacing exterior flange and spacing interior flange, and through setting up the screw clamping ring, the screw clamping ring can be pressed spacing exterior flange on reset spring. Because the first end of transition pole is located outside the first end of installation section of thick bamboo, when the second end of promotion transition pole like this, reset spring compression changes, and the length that the first end of transition pole stretches out the installation section of thick bamboo will change. Because the outer wall of the mounting cylinder is provided with the reference outer flange, the first end of the mounting cylinder can be inserted into the blind hole to be measured during measurement, so that the reference outer flange is attached to the surface of a workpiece, then, a base of the depth micrometer is tightly attached to the end face of the second end of the mounting cylinder by using the depth micrometer, a measuring rod of the depth micrometer is abutted against the end face of the second end of the transition rod, the depth micrometer is adjusted, the transition rod is pushed to be in contact with the bottom of the blind hole by the measuring rod, since the distance between the end face of the first end of the transition rod and the reference outer flange can be obtained in advance before the mounting cylinder is inserted into the blind hole, for example, the blind hole depth adjusting device is obtained by measuring, the distance for adjusting the depth micrometer to push the transition rod to move can be obtained by the depth micrometer, and the sum of the distance between the end face of the first end of the transition rod and the reference outer flange and the distance for adjusting the depth micrometer to push the transition rod to move is the depth of the blind hole. The measuring range of the depth micrometer is improved, and the blind hole with larger depth can be measured.
As shown in fig. 1, the transition rod 20 may have zero-set graduations 20a on the outer wall thereof. The terminal surface of the first end of benchmark outward flange 11 and transition rod 20 is H at the ascending distance of transition rod 20 axial, through screwing screw clamping ring 40, promote spacing outward flange 21 by screw clamping ring 40, transition rod 20 is along axial displacement, make zero set scale mark 20a align with the terminal surface of the first end of installation section of thick bamboo 10, note H this moment, screw clamping ring 40 is screwed when using blind hole degree of depth auxiliary measuring instrument like this at every turn, make zero set scale mark 20a align the back with the terminal surface of the first end of installation section of thick bamboo 10, just can know this moment the terminal surface of benchmark outward flange 11 and the first end of transition rod 20 is H at transition rod 20 axial distance, and need not measure again. After the measurement is completed, the threaded press ring 40 can be screwed to extend the return spring 30, so that the return spring 30 is prevented from being deformed and loosened due to long-time compression, or the blind hole depth auxiliary measuring tool can be disassembled, the return spring 30 is taken out, and the blind hole depth auxiliary measuring tool is assembled when in use.
Alternatively, the distance D from the zero-setting scale line 20a of the transition rod 20 to the end surface of the second end of the transition rod 20 in the axial direction of the transition rod 20 may be equal to the distance D between the end surfaces of the two ends of the mounting cylinder 10. Thus, after the zero-set scale lines 20a are aligned with the end surface of the first end of the mounting cylinder 10, the end surface of the second end of the transition rod 20 can be aligned with the end surface of the second end of the mounting cylinder 10. When measuring, hug closely the base of degree of depth micrometer on the terminal surface of the second end of installation section of thick bamboo 10, degree of depth micrometer is in 0 scale, and the terminal surface of the measuring stick of degree of depth micrometer just offsets with the terminal surface of the second end of transition rod 20, and the scale of degree of depth micrometer just can be more direct reflects the distance that the measuring stick promoted transition rod 20 and remove like this, the measurement of being more convenient for.
Alternatively, the auxiliary measuring tool may include a plurality of transition rods 20 of different lengths. Thus, the range of the depth micrometer can be further changed by replacing the transition rod 20 with different lengths.
Further, each transition rod 20 may have zero-set graduation marks 20a thereon. In addition, for each transition rod 20, the distance from the zero-setting scale line 20a of the transition rod 20 to the end surface of the second end of the transition rod 20 is equal to the distance from the end surfaces of the two ends of the installation cylinder 10.
As shown in fig. 1, the end surface of the first end of the transition rod 20 may be spherically convex. This facilitates the contact of the transition rod 20 with the bottom of the blind hole.
The limiting inner flange 12 and the transition rod 20 can be in clearance fit so as to facilitate the movement of the transition rod 20. Illustratively, the difference between the inner diameter of the inner restraining flange 12 and the outer diameter of the transition rod 20 may be no more than 0.1 mm. If the clearance between the limiting inner flange 12 and the transition rod 20 is too small, clamping stagnation is easy to occur, and the movement of the transition rod 20 is inconvenient, and if the clearance between the limiting inner flange 12 and the transition rod 20 is too large, the transition rod 20 is easy to incline, and the measurement precision is influenced.
As shown in fig. 1, the blind hole depth auxiliary measuring tool may further include a protective cover 50. A shield cover 50 is detachably provided at the second end of the mounting barrel 10. Because the terminal surface of the second end of installation section of thick bamboo 10 needs to paste mutually with the base of degree of depth micrometer, the terminal surface of the second end of transition rod 20 needs to offset with the measuring stick of degree of depth micrometer, the roughness of the terminal surface of the second end of installation section of thick bamboo 10, the roughness of the terminal surface of the second end of transition rod 20 all can influence measured accurate degree, consequently protect blind hole degree of depth appurtenance through setting up protective cover 50, avoid the fish tail, be favorable to ensureing measurement accuracy.
Further, a sealing gasket 51 may be interposed between the protecting cover 50 and the second end face of the mounting tube 10. Through setting up sealing gasket 51, avoid the direct second end terminal surface contact with the installation section of thick bamboo 10 of protective cover 50, can prevent the second end terminal surface of protective cover 50 fish tail installation section of thick bamboo 10.
Illustratively, sealing gasket 51 may be a rubber gasket.
Alternatively, the blind hole depth auxiliary measuring tool may be a metal structural member. The adoption of the metal structural part can reduce the deformation of the tool, particularly avoid the deformation of the transition rod 20, the reference outer flange 11 and the mounting cylinder 10, and is beneficial to ensuring the measurement accuracy. Illustratively, the blind hole depth auxiliary measuring tool may be a stainless steel structural member.
The embodiment of the invention also provides a blind hole depth measuring device which comprises a depth micrometer 60 and a blind hole depth auxiliary measuring tool shown in figure 1.
Fig. 2 is a schematic view of a usage status of a blind hole depth measuring device according to an embodiment of the present invention. As shown in fig. 2, the base 62 of the micrometer 60 is attached to the end surface of the second end of the mounting tube 10, and the measuring rod 61 of the micrometer 60 abuts against the end surface of the second end of the transition rod 20.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The blind hole depth auxiliary measuring tool is characterized by comprising an installation cylinder (10), a transition rod (20), a reset spring (30) and a threaded compression ring (40), wherein a reference outer flange (11) is arranged on the outer wall of the installation cylinder (10), the reference outer flange (11) is used for being attached to the surface of a workpiece, a limiting inner flange (12) is arranged inside a first end of the installation cylinder (10), the transition rod (20) is coaxially inserted into the installation cylinder (10), the first end of the transition rod (20) is positioned outside the first end of the installation cylinder (10), a second end of the transition rod (20) is positioned inside the installation cylinder (10), a limiting outer flange (21) is arranged on the outer wall of the transition rod (20), the reset spring (30) is coaxially sleeved outside the transition rod (20), and two ends of the reset spring (30) are respectively abutted against the limiting outer flange (21) and the limiting inner flange (12), screw thread clamping ring (40) are located in installation section of thick bamboo (10), screw thread clamping ring (40) with the inner wall threaded connection of installation section of thick bamboo (10), screw thread clamping ring (40) with spacing outward flange (21) contact, spacing outward flange (21) are located screw thread clamping ring (40) with between reset spring (30), zero set scale mark (20a) have on the outer wall of transition pole (20), follow the axial of transition pole (20) zero set scale mark (20a) are arrived the distance of the terminal surface of the second end of transition pole (20) with the distance of installation section of thick bamboo (10) both ends terminal surface equals.
2. Blind hole depth auxiliary measuring tool according to claim 1, characterized in that it comprises a plurality of said transition rods (20) of different lengths.
3. Blind hole depth auxiliary measuring tool according to claim 1, characterized in that the end surface of the first end of the transition rod (20) is spherically convex.
4. Blind hole depth auxiliary measuring tool according to claim 1, characterized in that the difference between the inner diameter of the inner limiting flange (12) and the outer diameter of the transition rod (20) does not exceed 0.1 mm.
5. The blind hole depth auxiliary measuring tool according to claim 1, further comprising a protective cover (50), wherein the protective cover (50) is detachably disposed at the second end of the mounting barrel (10).
6. The auxiliary blind hole depth measuring tool as claimed in claim 5, wherein a sealing gasket (51) is sandwiched between the protecting cover (50) and the second end face of the mounting barrel (10).
7. The auxiliary blind hole depth measuring tool according to claim 1, wherein the auxiliary blind hole depth measuring tool is a metal structural member.
8. A blind hole depth measuring device is characterized by comprising a depth micrometer and a blind hole depth auxiliary measuring tool according to any one of claims 1 to 7.
CN201910148307.9A 2019-02-28 2019-02-28 Blind hole depth auxiliary measuring tool and blind hole depth measuring device Active CN109931852B (en)

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CN113914176B (en) * 2021-10-14 2022-11-04 河南宏盛工程监理有限公司 Highway pavement flatness detection marking device and detection marking method

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