CN214793574U - Bolt axial force measuring device - Google Patents
Bolt axial force measuring device Download PDFInfo
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- CN214793574U CN214793574U CN202022813780.5U CN202022813780U CN214793574U CN 214793574 U CN214793574 U CN 214793574U CN 202022813780 U CN202022813780 U CN 202022813780U CN 214793574 U CN214793574 U CN 214793574U
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- measuring device
- force measuring
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- axial force
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Abstract
The utility model belongs to the technical field of the bolt detects, the utility model provides a bolt axial force measuring device, bolt axial force measuring device installs in the measuring hole of bolt, bolt axial force measuring device includes: the pull rod passes through the shell, the nut of spiro union in the one end of pull rod and install the strainometer in the pull rod. The utility model provides a bolt axial force measuring device has adopted the integrated form structure, uses expanding structure, has guaranteed the laminating of bolt axial force measuring device and bolt, has realized the high accuracy measurement of axial force, has reduced the installation degree of difficulty of axial force measuring transducer, has realized the reuse of sensor, the cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of the bolt detects, concretely relates to bolt axial force measuring device.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
Whether the pre-tightening axial force of the bolt is proper or not is related to the reliability and safety of the structure work, and the accuracy of the axial force measurement is particularly important in the product development process. The existing bolt axial force testing means mainly comprise an ultrasonic wave measuring method and a strain gauge measuring method. The ultrasonic measurement method has high requirements on the surface quality of the bolt and has low measurement precision; the strain gauge measurement method has high requirements on measuring personnel, the operation difficulty is high, and the sensor cannot be reused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the poor operation of bolt axial force measurement accuracy is complicated and difficult to realize reuse among the prior art at least, this purpose is realized through following technical scheme:
the utility model provides a bolt axial force measuring device, bolt axial force measuring device includes:
the shell comprises a shell body and a butting part, the shell body is of a cylindrical structure, the butting part is annularly arranged outside one end of the shell body, a through hole extending along the axial direction of the shell body is formed in the shell body, and at least two opening structures are arranged at the other end of the shell body along the axial direction;
the pull rod is arranged in the through hole and sequentially comprises a fixed section, a main body section and a reducing section along the axial direction, at least part of the fixed section extends out of one end of the shell, at least part of the reducing section extends out of the other end of the shell, the diameter of the reducing section is gradually increased from one end connected with the main body section to the end far away from the main body section, and the maximum diameter size of the reducing section is larger than that of the through hole;
a fixing member connected to the fixing segment and abutting against the abutting portion;
a strain gauge, at least a portion of the strain gauge mounted inside the tie rod.
The utility model provides a bolt axial force measuring device has adopted the integrated form structure, uses expanding structure, has guaranteed the laminating of bolt axial force measuring device and bolt, has realized the high accuracy measurement of axial force, has reduced the installation degree of difficulty of axial force measuring transducer, has realized the reuse of sensor, the cost is reduced.
In addition, according to the utility model discloses a bolt axial force measuring device still can have following additional technical characterstic:
in some embodiments of the present invention, the number of the opening structures is two, and two of the opening structures are disposed in a central symmetry manner with the axis of the housing as a central line.
In some embodiments of the present invention, the axial length of the opening structure is greater than half of the axial length of the housing.
The utility model discloses an in some embodiments, the surface of canned paragraph is equipped with the external screw thread, the mounting is the nut, the nut be equipped with can with the external screw thread assorted internal thread of canned paragraph.
In some embodiments of the present invention, the inside of the pull rod is provided with a mounting hole, and the mounting hole penetrates through the pull rod along the axial direction.
In some embodiments of the present invention, the bolt axial force measuring device further includes a filler filled in the mounting hole.
In some embodiments of the present invention, the strain gauge includes a strain gauge and a signal line electrically connected to the strain gauge, the strain gauge is disposed inside the pull rod, and the signal line penetrates out of the pull rod.
In some embodiments of the present invention, the strain gage is bonded to the inner sidewall of the pull rod.
In some embodiments of the invention, the through hole inside the housing portion is a cylindrical through hole, the main body section having a cylindrical outer surface.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 schematically shows a structural schematic view of a bolt axial force measuring apparatus according to an embodiment of the present invention;
fig. 2 schematically shows a cross-sectional schematic view of a bolt axial force measuring device according to an embodiment of the present invention;
fig. 3 schematically shows a structural view of a bolt axial force measuring device according to an embodiment of the present invention when assembled in a bolt;
the reference symbols in the drawings denote the following:
10: bolt, 11: measuring a hole;
20: housing, 21: case portion, 22: an abutting portion, 23: an open structure;
30: tie rod, 31: fixed segment, 32: main body section, 33: diameter-changing section, 34: mounting hole, 35: a filler;
40: a fixing member;
50: strain gauge, 51: and a signal line.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "second" and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, an element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "inner", "side", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, the utility model provides a bolt axial force measuring device, bolt axial force measuring device includes:
the housing 20, the housing 20 includes a housing portion 21 and an abutting portion 22, the housing portion 21 is a cylindrical structure, the abutting portion 22 is annularly disposed outside one end of the housing portion 21, a through hole extending along an axial direction of the housing portion 21 is formed in the housing portion 21, and at least two opening structures 23 are disposed at the other end of the housing portion 21 along the axial direction;
the pull rod 30 is installed in the through hole, the pull rod 30 sequentially comprises a fixed section 31, a main body section 32 and a reducing section 33 along the axial direction, at least part of the fixed section 31 extends out of one end of the shell 20, at least part of the reducing section extends out of the other end of the shell 20, the diameter of the reducing section 33 is gradually increased from one end connected with the main body section 32 to the end far away from the main body section 32, and the maximum diameter size of the reducing section 33 is larger than that of the through hole;
a fixing member 40, the fixing member 40 being connected to the fixing segment 31 and abutting against the abutting portion 22;
and a strain gauge, at least a part of which is mounted inside the tie rod 30.
The using method of the device comprises the following steps: in the preparation stage of the bolt axial force measurement test, firstly, a measuring hole 11 is processed on the bolt 10, a bolt axial force measuring device is placed in the measuring hole 11 to ensure that the abutting part 22 is in close contact with the top surface of the bolt 10, then the nut 40 is screwed to enable the pull rod 30 to move upwards, the shell 20 expands to be tightly pressed with the inner surface of the measuring hole 11, sliding is not generated, and the bolt axial force measuring device is installed. After the mounting is completed, the signal line 51 is connected to calibrate and test the axial force. After the test is finished, the nut 40 is loosened, the pull rod 30 is knocked downwards, the shell 20 contracts, and the bolt axial force measuring device can be easily taken out, so that the bolt axial force measuring device can be repeatedly used.
The utility model provides a bolt axial force measuring device has adopted the integrated form structure, uses expanding structure, has guaranteed the laminating of bolt axial force measuring device and bolt 10, has realized the high accuracy measurement of axial force, has reduced the installation degree of difficulty of axial force measuring transducer, has realized the reuse of sensor, the cost is reduced.
In some embodiments of the present invention, the number of the opening structures 23 is two, and the two opening structures 23 are disposed symmetrically about the axis of the shell 20, so that the bolt 10 is more stable when being clamped.
In some embodiments of the present invention, the axial length of the opening structure 23 is greater than half of the axial length of the housing portion 21, so that the opening structure 23 can expand to a larger extent, and the bolt axial force measuring device can be used for bolts 10 with different widths.
In some embodiments of the present invention, the surface of the fixing section 31 is provided with an external thread, and the fixing member 40 is a nut provided with an internal thread capable of matching with the external thread of the fixing section 31.
In some embodiments of the present invention, the inside of the pull rod 30 is provided with a mounting hole 34, the mounting hole 34 penetrates through the pull rod 30 along the axial direction, and the strain gauge 50 can be adhered at any position, which is convenient for measurement.
In some embodiments of the present invention, the bolt axial force measuring device further includes a filler 35 filled in the strain gauge measuring hole 34, and plays a role of protecting the strain gauge 50 and the signal line 51.
In some embodiments of the present invention, the strain gauge includes a strain gauge 50 and a signal line 51 electrically connected to the strain gauge 50, the signal line 51 penetrates through the strain gauge measuring hole 34, the strain gauge 50 is disposed inside the pull rod 30, and the signal line 51 penetrates through the pull rod 30 for outputting a strain signal.
In some embodiments of the present invention, the strain gauge 50 is bonded to the inner side wall of the pull rod 30, and the position of the strain gauge 50 can be conveniently adjusted according to the measured actual conditions.
In some embodiments of the present invention, the through hole inside the housing portion 21 is a cylindrical through hole, and the main body section 32 has a cylindrical outer surface, so that the cylindrical structure is convenient to process.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A bolt axial force measuring device, characterized by comprising:
the shell comprises a shell body and a butting part, the shell body is of a cylindrical structure, the butting part is annularly arranged outside one end of the shell body, a through hole extending along the axial direction of the shell body is formed in the shell body, and at least two opening structures are arranged at the other end of the shell body along the axial direction;
the pull rod is arranged in the through hole and sequentially comprises a fixed section, a main body section and a reducing section along the axial direction, at least part of the fixed section extends out of one end of the shell, at least part of the reducing section extends out of the other end of the shell, the diameter of the reducing section is gradually increased from one end connected with the main body section to the end far away from the main body section, and the maximum diameter size of the reducing section is larger than that of the through hole;
a fixing member connected to the fixing segment and abutting against the abutting portion;
a strain gauge, at least a portion of the strain gauge mounted inside the tie rod.
2. The bolt axial force measuring device according to claim 1, wherein the number of the opening structures is two, and the two opening structures are arranged in a central symmetry manner with the axis of the housing as a center line.
3. The bolt axial force measuring device of claim 1, wherein the axial length of the opening structure is greater than half of the axial length of the housing.
4. The bolt axial force measuring device of claim 1, wherein the surface of the fixing section is provided with an external thread, the fixing member is a nut, and the nut is provided with an internal thread capable of matching with the external thread of the fixing section.
5. The bolt axial force measuring device of claim 1, wherein a mounting hole is formed in the pull rod, and the mounting hole penetrates through the pull rod in the axial direction.
6. The bolt shaft force measuring device according to claim 5, further comprising a filler filled in the mounting hole.
7. The bolt shaft force measuring device according to claim 1, wherein the strain gauge includes a strain gauge and a signal line electrically connected to the strain gauge, the strain gauge is provided inside the tie rod, and the signal line is provided through the tie rod.
8. The bolt shaft force measuring device of claim 7, wherein the strain gage is bonded to an inner sidewall of the tie rod.
9. The bolt shaft force measuring device of claim 1, wherein the through bore inside the housing portion is a cylindrical through bore, the body section having a cylindrical outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022813780.5U CN214793574U (en) | 2020-11-27 | 2020-11-27 | Bolt axial force measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022813780.5U CN214793574U (en) | 2020-11-27 | 2020-11-27 | Bolt axial force measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214793574U true CN214793574U (en) | 2021-11-19 |
Family
ID=78710006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022813780.5U Active CN214793574U (en) | 2020-11-27 | 2020-11-27 | Bolt axial force measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214793574U (en) |
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2020
- 2020-11-27 CN CN202022813780.5U patent/CN214793574U/en active Active
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